gcc/configure.ac

   1 # configure.ac for GCC
   2 # Process this file with autoconf to generate a configuration script.
   3
   4 # Copyright (C) 1997-2017 Free Software Foundation, Inc.
   5
   6 #This file is part of GCC.
   7
   8 #GCC is free software; you can redistribute it and/or modify it under
   9 #the terms of the GNU General Public License as published by the Free
  10 #Software Foundation; either version 3, or (at your option) any later
  11 #version.
  12
  13 #GCC is distributed in the hope that it will be useful, but WITHOUT
  14 #ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  15 #FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  16 #for more details.
  17
  18 #You should have received a copy of the GNU General Public License
  19 #along with GCC; see the file COPYING3.  If not see
  20 #<http://www.gnu.org/licenses/>.
  21
  22 # --------------------------------
  23 # Initialization and sanity checks
  24 # --------------------------------
  25
  26 AC_PREREQ(2.64)
  27 AC_INIT
  28 AC_CONFIG_SRCDIR(tree.c)
  29 AC_CONFIG_HEADER(auto-host.h:config.in)
  30
  31 gcc_version=`cat $srcdir/BASE-VER`
  32
  33 # Determine the host, build, and target systems
  34 AC_CANONICAL_BUILD
  35 AC_CANONICAL_HOST
  36 AC_CANONICAL_TARGET
  37
  38 # Determine the noncanonical host name, for Ada.
  39 ACX_NONCANONICAL_HOST
  40
  41 # Determine the noncanonical target name, for directory use.
  42 ACX_NONCANONICAL_TARGET
  43
  44 # Used for constructing correct paths for offload compilers.
  45 real_target_noncanonical=${target_noncanonical}
  46 accel_dir_suffix=
  47
  48 # Determine the target- and build-specific subdirectories
  49 GCC_TOPLEV_SUBDIRS
  50
  51 # Set program_transform_name
  52 AC_ARG_PROGRAM
  53
  54 # Check for bogus environment variables.
  55 # Test if LIBRARY_PATH contains the notation for the current directory
  56 # since this would lead to problems installing/building glibc.
  57 # LIBRARY_PATH contains the current directory if one of the following
  58 # is true:
  59 # - one of the terminals (":" and ";") is the first or last sign
  60 # - two terminals occur directly after each other
  61 # - the path contains an element with a dot in it
  62 AC_MSG_CHECKING(LIBRARY_PATH variable)
  63 changequote(,)dnl
  64 case ${LIBRARY_PATH} in
  65   [:\;]* | *[:\;] | *[:\;][:\;]* |  *[:\;]. | .[:\;]*| . | *[:\;].[:\;]* )
  66     library_path_setting="contains current directory"
  67     ;;
  68   *)
  69     library_path_setting="ok"
  70     ;;
  71 esac
  72 changequote([,])dnl
  73 AC_MSG_RESULT($library_path_setting)
  74 if test "$library_path_setting" != "ok"; then
  75 AC_MSG_ERROR([
  76 *** LIBRARY_PATH shouldn't contain the current directory when
  77 *** building gcc. Please change the environment variable
  78 *** and run configure again.])
  79 fi
  80
  81 # Test if GCC_EXEC_PREFIX contains the notation for the current directory
  82 # since this would lead to problems installing/building glibc.
  83 # GCC_EXEC_PREFIX contains the current directory if one of the following
  84 # is true:
  85 # - one of the terminals (":" and ";") is the first or last sign
  86 # - two terminals occur directly after each other
  87 # - the path contains an element with a dot in it
  88 AC_MSG_CHECKING(GCC_EXEC_PREFIX variable)
  89 changequote(,)dnl
  90 case ${GCC_EXEC_PREFIX} in
  91   [:\;]* | *[:\;] | *[:\;][:\;]* |  *[:\;]. | .[:\;]*| . | *[:\;].[:\;]* )
  92     gcc_exec_prefix_setting="contains current directory"
  93     ;;
  94   *)
  95     gcc_exec_prefix_setting="ok"
  96     ;;
  97 esac
  98 changequote([,])dnl
  99 AC_MSG_RESULT($gcc_exec_prefix_setting)
 100 if test "$gcc_exec_prefix_setting" != "ok"; then
 101 AC_MSG_ERROR([
 102 *** GCC_EXEC_PREFIX shouldn't contain the current directory when
 103 *** building gcc. Please change the environment variable
 104 *** and run configure again.])
 105 fi
 106
 107 # -----------
 108 # Directories
 109 # -----------
 110
 111 # Specify the local prefix
 112 local_prefix=
 113 AC_ARG_WITH(local-prefix,
 114 [AS_HELP_STRING([--with-local-prefix=DIR],
 115                 [specifies directory to put local include])],
 116 [case "${withval}" in
 117 yes)    AC_MSG_ERROR(bad value ${withval} given for local include directory prefix) ;;
 118 no)     ;;
 119 *)      local_prefix=$with_local_prefix ;;
 120 esac])
 121
 122 # Default local prefix if it is empty
 123 if test x$local_prefix = x; then
 124         local_prefix=/usr/local
 125 fi
 126
 127 AC_ARG_WITH([native-system-header-dir],
 128   [  --with-native-system-header-dir=dir
 129                           use dir as the directory to look for standard
 130                           system header files in.  Defaults to /usr/include.],
 131 [
 132  case ${with_native_system_header_dir} in
 133  yes|no) AC_MSG_ERROR([bad value ${withval} given for --with-native-system-header-dir]) ;;
 134  /* | [[A-Za-z]]:[[\\/]]*) ;;
 135  *) AC_MSG_ERROR([--with-native-system-header-dir argument ${withval} must be an absolute directory]) ;;
 136  esac
 137  configured_native_system_header_dir="${withval}"
 138 ], [configured_native_system_header_dir=])
 139
 140 AC_ARG_WITH(build-sysroot,
 141   [AS_HELP_STRING([--with-build-sysroot=sysroot],
 142                   [use sysroot as the system root during the build])],
 143   [if test x"$withval" != x ; then
 144      SYSROOT_CFLAGS_FOR_TARGET="--sysroot=$withval"
 145    fi],
 146   [SYSROOT_CFLAGS_FOR_TARGET=])
 147 AC_SUBST(SYSROOT_CFLAGS_FOR_TARGET)
 148
 149 if test "x$prefix" = xNONE; then
 150  test_prefix=/usr/local
 151 else
 152  test_prefix=$prefix
 153 fi
 154 if test "x$exec_prefix" = xNONE; then
 155  test_exec_prefix=$test_prefix
 156 else
 157  test_exec_prefix=$exec_prefix
 158 fi
 159
 160 AC_ARG_WITH(sysroot,
 161 [AS_HELP_STRING([[--with-sysroot[=DIR]]],
 162                 [search for usr/lib, usr/include, et al, within DIR])],
 163 [
 164  case ${with_sysroot} in
 165  /) ;;
 166  */) with_sysroot=`echo $with_sysroot | sed 's,/$,,'` ;;
 167  esac
 168  case ${with_sysroot} in
 169  yes) TARGET_SYSTEM_ROOT='${exec_prefix}/${target_noncanonical}/sys-root' ;;
 170  *) TARGET_SYSTEM_ROOT=$with_sysroot ;;
 171  esac
 172
 173  TARGET_SYSTEM_ROOT_DEFINE='-DTARGET_SYSTEM_ROOT=\"$(TARGET_SYSTEM_ROOT)\"'
 174  CROSS_SYSTEM_HEADER_DIR='$(TARGET_SYSTEM_ROOT)$${sysroot_headers_suffix}$(NATIVE_SYSTEM_HEADER_DIR)'
 175
 176  case ${TARGET_SYSTEM_ROOT} in
 177  "${test_prefix}"|"${test_prefix}/"*|\
 178  "${test_exec_prefix}"|"${test_exec_prefix}/"*|\
 179  '${prefix}'|'${prefix}/'*|\
 180  '${exec_prefix}'|'${exec_prefix}/'*)
 181    t="$TARGET_SYSTEM_ROOT_DEFINE -DTARGET_SYSTEM_ROOT_RELOCATABLE"
 182    TARGET_SYSTEM_ROOT_DEFINE="$t"
 183    ;;
 184  esac
 185 ], [
 186  TARGET_SYSTEM_ROOT=
 187  TARGET_SYSTEM_ROOT_DEFINE=
 188  CROSS_SYSTEM_HEADER_DIR='$(gcc_tooldir)/sys-include'
 189 ])
 190 AC_SUBST(TARGET_SYSTEM_ROOT)
 191 AC_SUBST(TARGET_SYSTEM_ROOT_DEFINE)
 192 AC_SUBST(CROSS_SYSTEM_HEADER_DIR)
 193
 194 # Don't set gcc_gxx_include_dir to gxx_include_dir since that's only
 195 # passed in by the toplevel make and thus we'd get different behavior
 196 # depending on where we built the sources.
 197 gcc_gxx_include_dir=
 198 # Specify the g++ header file directory
 199 AC_ARG_WITH(gxx-include-dir,
 200 [AS_HELP_STRING([--with-gxx-include-dir=DIR],
 201                 [specifies directory to put g++ header files])],
 202 [case "${withval}" in
 203 yes)    AC_MSG_ERROR(bad value ${withval} given for g++ include directory) ;;
 204 no)     ;;
 205 *)      gcc_gxx_include_dir=$with_gxx_include_dir ;;
 206 esac])
 207
 208 # This logic must match libstdc++-v3/acinclude.m4:GLIBCXX_EXPORT_INSTALL_INFO.
 209 if test x${gcc_gxx_include_dir} = x; then
 210   if test x${enable_version_specific_runtime_libs} = xyes; then
 211     gcc_gxx_include_dir='${libsubdir}/include/c++'
 212   else
 213     libstdcxx_incdir='include/c++/$(version)'
 214     if test x$host != x$target; then
 215        libstdcxx_incdir="$target_alias/$libstdcxx_incdir"
 216     fi
 217     gcc_gxx_include_dir="\$(libsubdir)/\$(libsubdir_to_prefix)$libstdcxx_incdir"
 218   fi
 219 fi
 220
 221 gcc_gxx_include_dir_add_sysroot=0
 222 if test "${with_sysroot+set}" = set; then
 223   gcc_gxx_without_sysroot=`expr "${gcc_gxx_include_dir}" : "${with_sysroot}"'\(.*\)'`
 224   if test "${gcc_gxx_without_sysroot}"; then
 225     if test x${with_sysroot} != x/; then
 226       gcc_gxx_include_dir="${gcc_gxx_without_sysroot}"
 227     fi
 228     gcc_gxx_include_dir_add_sysroot=1
 229   fi
 230 fi
 231
 232 AC_ARG_WITH(cpp_install_dir,
 233 [AC_HELP_STRING([--with-cpp-install-dir=DIR],
 234                 [install the user visible C preprocessor in DIR
 235                  (relative to PREFIX) as well as PREFIX/bin])],
 236 [if test x$withval = xyes; then
 237   AC_MSG_ERROR([option --with-cpp-install-dir requires an argument])
 238 elif test x$withval != xno; then
 239   cpp_install_dir=$withval
 240 fi])
 241
 242 # We would like to our source tree to be readonly.  However when releases or
 243 # pre-releases are generated, the flex/bison generated files as well as the
 244 # various formats of manuals need to be included along with the rest of the
 245 # sources.  Therefore we have --enable-generated-files-in-srcdir to do
 246 # just that.
 247
 248 AC_MSG_CHECKING([whether to place generated files in the source directory])
 249   dnl generated-files-in-srcdir is disabled by default
 250   AC_ARG_ENABLE(generated-files-in-srcdir,
 251     [AS_HELP_STRING([--enable-generated-files-in-srcdir],
 252                     [put copies of generated files in source dir
 253                      intended for creating source tarballs for users
 254                      without texinfo bison or flex])],
 255       generated_files_in_srcdir=$enableval,
 256       generated_files_in_srcdir=no)
 257
 258 AC_MSG_RESULT($generated_files_in_srcdir)
 259
 260 if test "$generated_files_in_srcdir" = "yes"; then
 261   GENINSRC=''
 262 else
 263   GENINSRC='#'
 264 fi
 265 AC_SUBST(GENINSRC)
 266
 267 # -------------------
 268 # Find default linker
 269 # -------------------
 270
 271 # With GNU ld
 272 AC_ARG_WITH(gnu-ld,
 273 [AS_HELP_STRING([--with-gnu-ld], [arrange to work with GNU ld])],
 274 gnu_ld_flag="$with_gnu_ld",
 275 gnu_ld_flag=no)
 276
 277 case $target in
 278     *darwin*) ld64_flag=yes;; # Darwin can only use a ld64-compatible linker.
 279     *) ld64_flag=no;;
 280 esac
 281
 282 # With pre-defined ld
 283 AC_ARG_WITH(ld,
 284 [AS_HELP_STRING([--with-ld], [arrange to use the specified ld (full pathname)])],
 285 DEFAULT_LINKER="$with_ld")
 286 if test x"${DEFAULT_LINKER+set}" = x"set"; then
 287   if test ! -x "$DEFAULT_LINKER"; then
 288     AC_MSG_ERROR([cannot execute: $DEFAULT_LINKER: check --with-ld or env. var. DEFAULT_LINKER])
 289   elif $DEFAULT_LINKER -v < /dev/null 2>&1 | grep GNU > /dev/null; then
 290     gnu_ld_flag=yes
 291   elif $DEFAULT_LINKER -v < /dev/null 2>&1 | grep ld64- > /dev/null; then
 292     ld64_flag=yes
 293   fi
 294   AC_DEFINE_UNQUOTED(DEFAULT_LINKER,"$DEFAULT_LINKER",
 295         [Define to enable the use of a default linker.])
 296 fi
 297
 298 AC_MSG_CHECKING([whether a default linker was specified])
 299 if test x"${DEFAULT_LINKER+set}" = x"set"; then
 300   if test x"$gnu_ld_flag" = x"no"; then
 301     AC_MSG_RESULT([yes ($DEFAULT_LINKER)])
 302   else
 303     AC_MSG_RESULT([yes ($DEFAULT_LINKER - GNU ld)])
 304   fi
 305 else
 306   AC_MSG_RESULT(no)
 307 fi
 308
 309 # With demangler in GNU ld
 310 AC_ARG_WITH(demangler-in-ld,
 311 [AS_HELP_STRING([--with-demangler-in-ld], [try to use demangler in GNU ld])],
 312 demangler_in_ld="$with_demangler_in_ld",
 313 demangler_in_ld=yes)
 314
 315 # ----------------------
 316 # Find default assembler
 317 # ----------------------
 318
 319 # With GNU as
 320 AC_ARG_WITH(gnu-as,
 321 [AS_HELP_STRING([--with-gnu-as], [arrange to work with GNU as])],
 322 gas_flag="$with_gnu_as",
 323 gas_flag=no)
 324
 325 AC_ARG_WITH(as,
 326 [AS_HELP_STRING([--with-as], [arrange to use the specified as (full pathname)])],
 327 DEFAULT_ASSEMBLER="$with_as")
 328 if test x"${DEFAULT_ASSEMBLER+set}" = x"set"; then
 329   if test ! -x "$DEFAULT_ASSEMBLER"; then
 330     AC_MSG_ERROR([cannot execute: $DEFAULT_ASSEMBLER: check --with-as or env. var. DEFAULT_ASSEMBLER])
 331   elif $DEFAULT_ASSEMBLER -v < /dev/null 2>&1 | grep GNU > /dev/null; then
 332     gas_flag=yes
 333   fi
 334   AC_DEFINE_UNQUOTED(DEFAULT_ASSEMBLER,"$DEFAULT_ASSEMBLER",
 335         [Define to enable the use of a default assembler.])
 336 fi
 337
 338 AC_MSG_CHECKING([whether a default assembler was specified])
 339 if test x"${DEFAULT_ASSEMBLER+set}" = x"set"; then
 340   if test x"$gas_flag" = x"no"; then
 341     AC_MSG_RESULT([yes ($DEFAULT_ASSEMBLER)])
 342   else
 343     AC_MSG_RESULT([yes ($DEFAULT_ASSEMBLER - GNU as)])
 344   fi
 345 else
 346   AC_MSG_RESULT(no)
 347 fi
 348
 349 # ---------------
 350 # Find C compiler
 351 # ---------------
 352
 353 # If a non-executable a.out is present (e.g. created by GNU as above even if
 354 # invoked with -v only), the IRIX 6 native ld just overwrites the existing
 355 # file, even when creating an executable, so an execution test fails.
 356 # Remove possible default executable files to avoid this.
 357 #
 358 # FIXME: This really belongs into AC_PROG_CC and can be removed once
 359 # Autoconf includes it.
 360 rm -f a.out a.exe b.out
 361
 362 # Find the native compiler
 363 AC_PROG_CC
 364 AC_PROG_CXX
 365 ACX_PROG_GNAT([-I"$srcdir"/ada/libgnat])
 366
 367 # Do configure tests with the C++ compiler, since that's what we build with.
 368 AC_LANG(C++)
 369
 370 # Remove the -O2: for historical reasons, unless bootstrapping we prefer
 371 # optimizations to be activated explicitly by the toplevel.
 372 case "$CC" in
 373   */prev-gcc/xgcc*) ;;
 374   *) CFLAGS=`echo "$CFLAGS " | sed -e "s/-Ofast[[       ]]//" -e "s/-O[[gs]][[  ]]//" -e "s/-O[[0-9]]*[[        ]]//" `
 375      CXXFLAGS=`echo "$CXXFLAGS " | sed -e "s/-Ofast[[   ]]//" -e "s/-O[[gs]][[  ]]//" -e "s/-O[[0-9]]*[[        ]]//" ` ;;
 376 esac
 377 AC_SUBST(CFLAGS)
 378 AC_SUBST(CXXFLAGS)
 379
 380 # Determine PICFLAG for target gnatlib.
 381 GCC_PICFLAG_FOR_TARGET
 382 AC_SUBST(PICFLAG_FOR_TARGET)
 383
 384 # -------------------------
 385 # Check C compiler features
 386 # -------------------------
 387
 388 AC_USE_SYSTEM_EXTENSIONS
 389 AC_PROG_CPP
 390 AC_C_INLINE
 391
 392 AC_SYS_LARGEFILE
 393
 394 # sizeof(char) is 1 by definition.
 395 AC_CHECK_SIZEOF(void *)
 396 AC_CHECK_SIZEOF(short)
 397 AC_CHECK_SIZEOF(int)
 398 AC_CHECK_SIZEOF(long)
 399 AC_CHECK_TYPES([long long], [AC_CHECK_SIZEOF(long long)])
 400 GCC_STDINT_TYPES
 401 if test x"$ac_cv_c_uint64_t" = x"no" -o x"$ac_cv_c_int64_t" = x"no"; then
 402   AC_MSG_ERROR([uint64_t or int64_t not found])
 403 fi
 404
 405 # check what underlying integer type int64_t uses
 406 AC_CACHE_CHECK(for int64_t underlying type, ac_cv_int64_t_type, [
 407 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
 408 #ifdef HAVE_STDINT_H
 409 #include <stdint.h>
 410 #endif
 411 template <typename T> struct X { };
 412 template <>
 413 struct X<long> { typedef long t; };
 414 ]], [[X<int64_t>::t x;]])],[ac_cv_int64_t_type=long],[ac_cv_int64_t_type="long long"])])
 415 if test "$ac_cv_int64_t_type" = "long"; then
 416   AC_DEFINE(INT64_T_IS_LONG, 1,
 417   [Define if int64_t uses long as underlying type.])
 418 else
 419 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
 420 #ifdef HAVE_STDINT_H
 421 #include <stdint.h>
 422 #endif
 423 template <typename T> struct X { };
 424 template <>
 425 struct X<long long> { typedef long long t; };
 426 ]], [[X<int64_t>::t x;]])],[],[AC_MSG_ERROR([error verifying int64_t uses long long])])
 427 fi
 428
 429 AC_CACHE_CHECK(for std::swap in <utility>, ac_cv_std_swap_in_utility, [
 430 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
 431 #include <utility>
 432 ]], [[int a, b; std::swap(a,b);]])],[ac_cv_std_swap_in_utility=yes],[ac_cv_std_swap_in_utility=no])])
 433 if test $ac_cv_std_swap_in_utility = yes; then
 434   AC_DEFINE(HAVE_SWAP_IN_UTILITY, 1,
 435   [Define if <utility> defines std::swap.])
 436 fi
 437
 438 # Check whether compiler is affected by placement new aliasing bug (PR 29286).
 439 # If the host compiler is affected by the bug, and we build with optimization
 440 # enabled (which happens e.g. when cross-compiling), the pool allocator may
 441 # get miscompiled.  Use -fno-strict-aliasing to work around this problem.
 442 # Since there is no reliable feature check for the presence of this bug,
 443 # we simply use a GCC version number check.  (This should never trigger for
 444 # stages 2 or 3 of a native bootstrap.)
 445 aliasing_flags=
 446 if test "$GCC" = yes; then
 447   saved_CXXFLAGS="$CXXFLAGS"
 448
 449   # The following test compilation will succeed if and only if $CXX accepts
 450   # -fno-strict-aliasing *and* is older than GCC 4.3.
 451   CXXFLAGS="$CXXFLAGS -fno-strict-aliasing"
 452   AC_MSG_CHECKING([whether $CXX is affected by placement new aliasing bug])
 453   AC_COMPILE_IFELSE([
 454 #if (__GNUC__ > 4) || (__GNUC__ == 4 && __GNUC_MINOR__ >= 3)
 455 #error compiler not affected by placement new aliasing bug
 456 #endif
 457 ],
 458     [AC_MSG_RESULT([yes]); aliasing_flags='-fno-strict-aliasing'],
 459     [AC_MSG_RESULT([no])])
 460
 461   CXXFLAGS="$saved_CXXFLAGS"
 462 fi
 463 AC_SUBST(aliasing_flags)
 464
 465
 466
 467 # ---------------------
 468 # Warnings and checking
 469 # ---------------------
 470
 471 # Check $CC warning features (if it's GCC).
 472 # We want to use -pedantic, but we don't want warnings about
 473 # * 'long long'
 474 # * variadic macros
 475 # * overlong strings
 476 # * C++11 narrowing conversions in { }
 477 # So, we only use -pedantic if we can disable those warnings.
 478
 479 # In stage 1, disable -Wformat warnings from old GCCs about new % codes
 480 AC_ARG_ENABLE(build-format-warnings,
 481   AS_HELP_STRING([--disable-build-format-warnings],[don't use -Wformat while building GCC]),
 482   [],[enable_build_format_warnings=yes])
 483 AS_IF([test $enable_build_format_warnings = no],
 484       [wf_opt=-Wno-format],[wf_opt=])
 485 ACX_PROG_CXX_WARNING_OPTS(
 486         m4_quote(m4_do([-W -Wall -Wno-narrowing -Wwrite-strings ],
 487                        [-Wcast-qual $wf_opt])), [loose_warn])
 488 ACX_PROG_CC_WARNING_OPTS(
 489         m4_quote(m4_do([-Wstrict-prototypes -Wmissing-prototypes])),
 490         [c_loose_warn])
 491 ACX_PROG_CXX_WARNING_OPTS(
 492         m4_quote(m4_do([-Wmissing-format-attribute ],
 493                        [-Woverloaded-virtual])), [strict_warn])
 494 ACX_PROG_CC_WARNING_OPTS(
 495         m4_quote(m4_do([-Wold-style-definition -Wc++-compat])), [c_strict_warn])
 496 ACX_PROG_CXX_WARNING_ALMOST_PEDANTIC(
 497         m4_quote(m4_do([-Wno-long-long -Wno-variadic-macros ],
 498                        [-Wno-overlength-strings])), [strict_warn])
 499 ACX_PROG_CXX_WARNINGS_ARE_ERRORS([manual], [strict_warn])
 500
 501 # The above macros do nothing if the compiler is not GCC.  However, the
 502 # Makefile has more goo to add other flags, so these variables are used
 503 # to enable warnings only for GCC.
 504 warn_cflags=
 505 warn_cxxflags=
 506 if test "x$GCC" = "xyes"; then
 507   warn_cflags='$(GCC_WARN_CFLAGS)'
 508   warn_cxxflags='$(GCC_WARN_CXXFLAGS)'
 509 fi
 510 AC_SUBST(warn_cflags)
 511 AC_SUBST(warn_cxxflags)
 512
 513 # Disable exceptions and RTTI if building with g++
 514 ACX_PROG_CC_WARNING_OPTS(
 515         m4_quote(m4_do([-fno-exceptions -fno-rtti -fasynchronous-unwind-tables])),
 516                        [noexception_flags])
 517
 518 # Enable expensive internal checks
 519 is_release=
 520 if test x"`cat $srcdir/DEV-PHASE`" != xexperimental; then
 521   is_release=yes
 522 fi
 523
 524 AC_ARG_ENABLE(checking,
 525 [AS_HELP_STRING([[--enable-checking[=LIST]]],
 526                 [enable expensive run-time checks.  With LIST,
 527                  enable only specific categories of checks.
 528                  Categories are: yes,no,all,none,release.
 529                  Flags are: assert,df,extra,fold,gc,gcac,gimple,misc,
 530                  rtlflag,rtl,runtime,tree,valgrind,types])],
 531 [ac_checking_flags="${enableval}"],[
 532 # Determine the default checks.
 533 if test x$is_release = x ; then
 534   ac_checking_flags=yes,extra
 535 else
 536   ac_checking_flags=release
 537 fi])
 538 IFS="${IFS=     }"; ac_save_IFS="$IFS"; IFS="$IFS,"
 539 for check in release $ac_checking_flags
 540 do
 541         case $check in
 542         # these set all the flags to specific states
 543         yes)            ac_assert_checking=1 ; ac_checking=1 ; ac_df_checking= ;
 544                         ac_fold_checking= ; ac_gc_checking=1 ; ac_extra_checking= ;
 545                         ac_gc_always_collect= ; ac_gimple_checking=1 ; ac_rtl_checking= ;
 546                         ac_rtlflag_checking=1 ; ac_runtime_checking=1 ;
 547                         ac_tree_checking=1 ; ac_valgrind_checking= ;
 548                         ac_types_checking=1 ;;
 549         no|none)        ac_assert_checking= ; ac_checking= ; ac_df_checking= ;
 550                         ac_fold_checking= ; ac_gc_checking= ; ac_extra_checking= ;
 551                         ac_gc_always_collect= ; ac_gimple_checking= ; ac_rtl_checking= ;
 552                         ac_rtlflag_checking= ; ac_runtime_checking= ;
 553                         ac_tree_checking= ; ac_valgrind_checking= ;
 554                         ac_types_checking= ;;
 555         all)            ac_assert_checking=1 ; ac_checking=1 ; ac_df_checking=1 ;
 556                         ac_fold_checking=1 ; ac_gc_checking=1 ; ac_extra_checking=1 ;
 557                         ac_gc_always_collect=1 ; ac_gimple_checking=1 ; ac_rtl_checking=1 ;
 558                         ac_rtlflag_checking=1 ; ac_runtime_checking=1 ;
 559                         ac_tree_checking=1 ; ac_valgrind_checking= ;
 560                         ac_types_checking=1 ;;
 561         release)        ac_assert_checking=1 ; ac_checking= ; ac_df_checking= ;
 562                         ac_fold_checking= ; ac_gc_checking= ; ac_extra_checking= ;
 563                         ac_gc_always_collect= ; ac_gimple_checking= ; ac_rtl_checking= ;
 564                         ac_rtlflag_checking= ; ac_runtime_checking=1 ;
 565                         ac_tree_checking= ; ac_valgrind_checking= ;
 566                         ac_types_checking= ;;
 567         # these enable particular checks
 568         assert)         ac_assert_checking=1 ;;
 569         df)             ac_df_checking=1 ;;
 570         extra)          ac_extra_checking=1 ;;
 571         fold)           ac_fold_checking=1 ;;
 572         gc)             ac_gc_checking=1 ;;
 573         gcac)           ac_gc_always_collect=1 ;;
 574         gimple)         ac_gimple_checking=1 ;;
 575         misc)           ac_checking=1 ;;
 576         rtl)            ac_rtl_checking=1 ;;
 577         rtlflag)        ac_rtlflag_checking=1 ;;
 578         runtime)        ac_runtime_checking=1 ;;
 579         tree)           ac_tree_checking=1 ;;
 580         types)          ac_types_checking=1 ;;
 581         valgrind)       ac_valgrind_checking=1 ;;
 582         *)      AC_MSG_ERROR(unknown check category $check) ;;
 583         esac
 584 done
 585 IFS="$ac_save_IFS"
 586
 587 nocommon_flag=""
 588 if test x$ac_checking != x ; then
 589   AC_DEFINE(CHECKING_P, 1,
 590 [Define to 0/1 if you want more run-time sanity checks.  This one gets a grab
 591 bag of miscellaneous but relatively cheap checks.])
 592   nocommon_flag=-fno-common
 593 else
 594   AC_DEFINE(CHECKING_P, 0)
 595 fi
 596 AC_SUBST(nocommon_flag)
 597 if test x$ac_extra_checking != x ; then
 598   AC_DEFINE(ENABLE_EXTRA_CHECKING, 1,
 599 [Define to 0/1 if you want extra run-time checking that might affect code
 600 generation.])
 601 else
 602   AC_DEFINE(ENABLE_EXTRA_CHECKING, 0)
 603 fi
 604 if test x$ac_df_checking != x ; then
 605   AC_DEFINE(ENABLE_DF_CHECKING, 1,
 606 [Define if you want more run-time sanity checks for dataflow.])
 607 fi
 608 if test x$ac_assert_checking != x ; then
 609   AC_DEFINE(ENABLE_ASSERT_CHECKING, 1,
 610 [Define if you want assertions enabled.  This is a cheap check.])
 611 fi
 612 if test x$ac_gimple_checking != x ; then
 613   AC_DEFINE(ENABLE_GIMPLE_CHECKING, 1,
 614 [Define if you want operations on GIMPLE (the basic data structure of
 615 the high-level optimizers) to be checked for dynamic type safety at
 616 runtime.  This is moderately expensive.])
 617 fi
 618 GCC_TARGET_TEMPLATE(ENABLE_RUNTIME_CHECKING)
 619 if test x$ac_runtime_checking != x ; then
 620   AC_DEFINE(ENABLE_RUNTIME_CHECKING, 1,
 621 [Define if you want runtime assertions enabled.  This is a cheap check.])
 622 fi
 623 if test x$ac_tree_checking != x ; then
 624   AC_DEFINE(ENABLE_TREE_CHECKING, 1,
 625 [Define if you want all operations on trees (the basic data
 626    structure of the front ends) to be checked for dynamic type safety
 627    at runtime.  This is moderately expensive.
 628    ])
 629   TREECHECKING=yes
 630 fi
 631 if test x$ac_types_checking != x ; then
 632   AC_DEFINE(ENABLE_TYPES_CHECKING, 1,
 633 [Define if you want all gimple types to be verified after gimplifiation.
 634    This is cheap.
 635    ])
 636 fi
 637 AC_SUBST(TREECHECKING)
 638 if test x$ac_rtl_checking != x ; then
 639   AC_DEFINE(ENABLE_RTL_CHECKING, 1,
 640 [Define if you want all operations on RTL (the basic data structure
 641    of the optimizer and back end) to be checked for dynamic type safety
 642    at runtime.  This is quite expensive.])
 643 fi
 644 if test x$ac_rtlflag_checking != x ; then
 645   AC_DEFINE(ENABLE_RTL_FLAG_CHECKING, 1,
 646 [Define if you want RTL flag accesses to be checked against the RTL
 647    codes that are supported for each access macro.  This is relatively
 648    cheap.])
 649 fi
 650 if test x$ac_gc_checking != x ; then
 651   AC_DEFINE(ENABLE_GC_CHECKING, 1,
 652 [Define if you want the garbage collector to do object poisoning and
 653    other memory allocation checks.  This is quite expensive.])
 654 fi
 655 if test x$ac_gc_always_collect != x ; then
 656   AC_DEFINE(ENABLE_GC_ALWAYS_COLLECT, 1,
 657 [Define if you want the garbage collector to operate in maximally
 658    paranoid mode, validating the entire heap and collecting garbage at
 659    every opportunity.  This is extremely expensive.])
 660 fi
 661 if test x$ac_fold_checking != x ; then
 662   AC_DEFINE(ENABLE_FOLD_CHECKING, 1,
 663 [Define if you want fold checked that it never destructs its argument.
 664    This is quite expensive.])
 665 fi
 666 valgrind_path_defines=
 667 valgrind_command=
 668
 669 dnl # This check AC_REQUIREs various stuff, so it *must not* be inside
 670 dnl # an if statement.  This was the source of very frustrating bugs
 671 dnl # in converting to autoconf 2.5x!
 672 AC_CHECK_HEADER(valgrind.h, have_valgrind_h=yes, have_valgrind_h=no)
 673
 674 # It is certainly possible that there's valgrind but no valgrind.h.
 675 # GCC relies on making annotations so we must have both.
 676 AC_MSG_CHECKING(for VALGRIND_DISCARD in <valgrind/memcheck.h>)
 677 AC_PREPROC_IFELSE([AC_LANG_SOURCE(
 678   [[#include <valgrind/memcheck.h>
 679 #ifndef VALGRIND_DISCARD
 680 #error VALGRIND_DISCARD not defined
 681 #endif]])],
 682   [gcc_cv_header_valgrind_memcheck_h=yes],
 683   [gcc_cv_header_valgrind_memcheck_h=no])
 684 AC_MSG_RESULT($gcc_cv_header_valgrind_memcheck_h)
 685 AC_MSG_CHECKING(for VALGRIND_DISCARD in <memcheck.h>)
 686 AC_PREPROC_IFELSE([AC_LANG_SOURCE(
 687   [[#include <memcheck.h>
 688 #ifndef VALGRIND_DISCARD
 689 #error VALGRIND_DISCARD not defined
 690 #endif]])],
 691   [gcc_cv_header_memcheck_h=yes],
 692   [gcc_cv_header_memcheck_h=no])
 693 AC_MSG_RESULT($gcc_cv_header_memcheck_h)
 694 if test $gcc_cv_header_valgrind_memcheck_h = yes; then
 695   AC_DEFINE(HAVE_VALGRIND_MEMCHECK_H, 1,
 696         [Define if valgrind's valgrind/memcheck.h header is installed.])
 697 fi
 698 if test $gcc_cv_header_memcheck_h = yes; then
 699   AC_DEFINE(HAVE_MEMCHECK_H, 1,
 700         [Define if valgrind's memcheck.h header is installed.])
 701 fi
 702
 703 if test x$ac_valgrind_checking != x ; then
 704   AM_PATH_PROG_WITH_TEST(valgrind_path, valgrind,
 705         [$ac_dir/$ac_word --version | grep valgrind- >/dev/null 2>&1])
 706   if test "x$valgrind_path" = "x" \
 707     || (test $have_valgrind_h = no \
 708         && test $gcc_cv_header_memcheck_h = no \
 709         && test $gcc_cv_header_valgrind_memcheck_h = no); then
 710         AC_MSG_ERROR([*** Can't find both valgrind and valgrind/memcheck.h, memcheck.h or valgrind.h])
 711   fi
 712   valgrind_path_defines=-DVALGRIND_PATH='\"'$valgrind_path'\"'
 713   valgrind_command="$valgrind_path -q"
 714   AC_DEFINE(ENABLE_VALGRIND_CHECKING, 1,
 715 [Define if you want to run subprograms and generated programs
 716    through valgrind (a memory checker).  This is extremely expensive.])
 717 fi
 718 AC_SUBST(valgrind_path_defines)
 719 AC_SUBST(valgrind_command)
 720
 721 # Enable code coverage collection
 722 AC_ARG_ENABLE(coverage,
 723 [AS_HELP_STRING([[--enable-coverage[=LEVEL]]],
 724                 [enable compiler's code coverage collection.
 725                  Use to measure compiler performance and locate
 726                  unused parts of the compiler. With LEVEL, specify
 727                  optimization. Values are opt, noopt,
 728                  default is noopt])],
 729 [case "${enableval}" in
 730   yes|noopt)
 731     coverage_flags="-fprofile-arcs -ftest-coverage -frandom-seed=\$@ -O0 -fkeep-inline-functions -fkeep-static-functions"
 732     ;;
 733   opt)
 734     coverage_flags="-fprofile-arcs -ftest-coverage -frandom-seed=\$@ -O2 -fkeep-inline-functions -fkeep-static-functions"
 735     ;;
 736   no)
 737     # a.k.a. --disable-coverage
 738     coverage_flags=""
 739     ;;
 740   *)
 741     AC_MSG_ERROR(unknown coverage setting $enableval)
 742     ;;
 743 esac],
 744 [coverage_flags=""])
 745 AC_SUBST(coverage_flags)
 746
 747 AC_ARG_ENABLE(gather-detailed-mem-stats,
 748 [AS_HELP_STRING([--enable-gather-detailed-mem-stats],
 749                 [enable detailed memory allocation stats gathering])], [],
 750 [enable_gather_detailed_mem_stats=no])
 751 gather_stats=`if test $enable_gather_detailed_mem_stats != no; then echo 1; else echo 0; fi`
 752 AC_DEFINE_UNQUOTED(GATHER_STATISTICS, $gather_stats,
 753 [Define to enable detailed memory allocation stats gathering.])
 754
 755 AC_ARG_ENABLE(valgrind-annotations,
 756 [AS_HELP_STRING([--enable-valgrind-annotations],
 757                 [enable valgrind runtime interaction])], [],
 758 [enable_valgrind_annotations=no])
 759 if test x$enable_valgrind_annotations != xno \
 760     || test x$ac_valgrind_checking != x; then
 761   if (test $have_valgrind_h = no \
 762       && test $gcc_cv_header_memcheck_h = no \
 763       && test $gcc_cv_header_valgrind_memcheck_h = no); then
 764     AC_MSG_ERROR([*** Can't find valgrind/memcheck.h, memcheck.h or valgrind.h])
 765   fi
 766   AC_DEFINE(ENABLE_VALGRIND_ANNOTATIONS, 1,
 767 [Define to get calls to the valgrind runtime enabled.])
 768 fi
 769
 770 # -------------------------------
 771 # Miscenalleous configure options
 772 # -------------------------------
 773
 774 # With stabs
 775 AC_ARG_WITH(stabs,
 776 [AS_HELP_STRING([--with-stabs],
 777                 [arrange to use stabs instead of host debug format])],
 778 stabs="$with_stabs",
 779 stabs=no)
 780
 781 # Determine whether or not multilibs are enabled.
 782 AC_ARG_ENABLE(multilib,
 783 [AS_HELP_STRING([--enable-multilib],
 784                 [enable library support for multiple ABIs])],
 785 [], [enable_multilib=yes])
 786 AC_SUBST(enable_multilib)
 787
 788 # Determine whether or not multiarch is enabled.
 789 AC_ARG_ENABLE(multiarch,
 790 [AS_HELP_STRING([--enable-multiarch],
 791                 [enable support for multiarch paths])],
 792 [case "${enableval}" in
 793 yes|no|auto) enable_multiarch=$enableval;;
 794 *) AC_MSG_ERROR(bad value ${enableval} given for --enable-multiarch option) ;;
 795 esac], [enable_multiarch=auto])
 796 if test x${enable_multiarch} = xauto; then
 797   if test x${with_native_system_header_dir} != x; then
 798     ma_msg_suffix=", disabled auto check (configured with --native-system-header-dir)"
 799     enable_multiarch=no
 800   fi
 801   if test x$host != x$target && test "x$with_sysroot" = x; then
 802     ma_msg_suffix=", disabled auto check (cross build configured without --with-sysroot)"
 803     enable_multiarch=no
 804   fi
 805 fi
 806 AC_MSG_CHECKING(for multiarch configuration)
 807 AC_SUBST(enable_multiarch)
 808 AC_MSG_RESULT($enable_multiarch$ma_msg_suffix)
 809
 810 # needed for setting the multiarch name for soft-float/hard-float ABIs
 811 AC_SUBST(with_cpu)
 812 AC_SUBST(with_float)
 813
 814 # Enable __cxa_atexit for C++.
 815 AC_ARG_ENABLE(__cxa_atexit,
 816 [AS_HELP_STRING([--enable-__cxa_atexit], [enable __cxa_atexit for C++])],
 817 [], [])
 818
 819 # Enable C extension for decimal float if target supports it.
 820 GCC_AC_ENABLE_DECIMAL_FLOAT([$target])
 821
 822 dfp=`if test $enable_decimal_float != no; then echo 1; else echo 0; fi`
 823 AC_DEFINE_UNQUOTED(ENABLE_DECIMAL_FLOAT, $dfp,
 824 [Define to 1 to enable decimal float extension to C.])
 825
 826 # Use default_decimal_float for dependency.
 827 enable_decimal_float=$default_decimal_float
 828
 829 bid=`if test $enable_decimal_float = bid; then echo 1; else echo 0; fi`
 830 AC_DEFINE_UNQUOTED(ENABLE_DECIMAL_BID_FORMAT, $bid,
 831 [Define to 1 to specify that we are using the BID decimal floating
 832 point format instead of DPD])
 833
 834 # Enable C extension for fixed-point arithmetic.
 835 AC_ARG_ENABLE(fixed-point,
 836 [AS_HELP_STRING([--enable-fixed-point],
 837                 [enable fixed-point arithmetic extension to C])],
 838 [],
 839 [
 840   case $target in
 841     arm*)
 842       enable_fixed_point=yes
 843       ;;
 844
 845     mips*-*-*)
 846       enable_fixed_point=yes
 847       ;;
 848     *)
 849       AC_MSG_WARN([fixed-point is not supported for this target, ignored])
 850       enable_fixed_point=no
 851       ;;
 852   esac
 853 ])
 854 AC_SUBST(enable_fixed_point)
 855
 856 fixedpoint=`if test $enable_fixed_point = yes; then echo 1; else echo 0; fi`
 857 AC_DEFINE_UNQUOTED(ENABLE_FIXED_POINT, $fixedpoint,
 858 [Define to 1 to enable fixed-point arithmetic extension to C.])
 859
 860 # Enable threads
 861 # Pass with no value to take the default
 862 # Pass with a value to specify a thread package
 863 AC_ARG_ENABLE(threads,
 864 [AS_HELP_STRING([[--enable-threads[=LIB]]],
 865                 [enable thread usage for target GCC,
 866                  using LIB thread package])],,
 867 [enable_threads=''])
 868
 869 AC_ARG_ENABLE(tls,
 870 [AS_HELP_STRING([--enable-tls],
 871                 [enable or disable generation of tls code
 872                  overriding the assembler check for tls support])],
 873 [
 874   case $enable_tls in
 875     yes | no) ;;
 876     *) AC_MSG_ERROR(['$enable_tls' is an invalid value for --enable-tls.
 877 Valid choices are 'yes' and 'no'.]) ;;
 878   esac
 879 ], [enable_tls=''])
 880
 881 AC_ARG_ENABLE(vtable-verify,
 882 [AS_HELP_STRING([--enable-vtable-verify],
 883                 [enable vtable verification feature])],,
 884 [enable_vtable_verify=no])
 885 vtable_verify=`if test x$enable_vtable_verify = xyes; then echo 1; else echo 0; fi`
 886 AC_DEFINE_UNQUOTED(ENABLE_VTABLE_VERIFY, $vtable_verify,
 887 [Define 0/1 if vtable verification feature is enabled.])
 888
 889 AC_ARG_ENABLE(objc-gc,
 890 [AS_HELP_STRING([--enable-objc-gc],
 891                 [enable the use of Boehm's garbage collector with
 892                  the GNU Objective-C runtime])],
 893 if test x$enable_objc_gc = xno; then
 894         objc_boehm_gc=''
 895 else
 896         objc_boehm_gc=1
 897 fi,
 898 objc_boehm_gc='')
 899
 900 AC_ARG_WITH(dwarf2,
 901 [AS_HELP_STRING([--with-dwarf2], [force the default debug format to be DWARF 2])],
 902 dwarf2="$with_dwarf2",
 903 dwarf2=no)
 904
 905 AC_ARG_ENABLE(shared,
 906 [AS_HELP_STRING([--disable-shared], [don't provide a shared libgcc])],
 907 [
 908   case $enable_shared in
 909   yes | no) ;;
 910   *)
 911     enable_shared=no
 912     IFS="${IFS=         }"; ac_save_ifs="$IFS"; IFS="${IFS}:,"
 913     for pkg in $enableval; do
 914       if test "X$pkg" = "Xgcc" || test "X$pkg" = "Xlibgcc"; then
 915         enable_shared=yes
 916       fi
 917     done
 918     IFS="$ac_save_ifs"
 919     ;;
 920   esac
 921 ], [enable_shared=yes])
 922 AC_SUBST(enable_shared)
 923
 924 AC_ARG_WITH(specs,
 925   [AS_HELP_STRING([--with-specs=SPECS],
 926                   [add SPECS to driver command-line processing])],
 927   [CONFIGURE_SPECS=$withval],
 928   [CONFIGURE_SPECS=]
 929 )
 930 AC_SUBST(CONFIGURE_SPECS)
 931
 932 ACX_PKGVERSION([GCC])
 933 ACX_BUGURL([https://gcc.gnu.org/bugs/])
 934
 935 # Sanity check enable_languages in case someone does not run the toplevel
 936 # configure # script.
 937 AC_ARG_ENABLE(languages,
 938 [AS_HELP_STRING([--enable-languages=LIST], [specify which front-ends to build])],
 939 [case ,${enable_languages}, in
 940        ,,|,yes,)
 941                 # go safe -- we cannot be much sure without the toplevel
 942                 # configure's
 943                 # analysis of which target libs are present and usable
 944                 enable_languages=c
 945                 ;;
 946          *,all,*)
 947                 AC_MSG_ERROR([only the toplevel supports --enable-languages=all])
 948                 ;;
 949         *,c,*)
 950                 ;;
 951         *)
 952                 enable_languages=c,${enable_languages}
 953                 ;;
 954 esac],
 955 [enable_languages=c])
 956
 957 if test x"$enable_as_accelerator_for" != x; then
 958   AC_DEFINE(ACCEL_COMPILER, 1,
 959     [Define if this compiler should be built as the offload target compiler.])
 960   enable_as_accelerator=yes
 961   case "${target}" in
 962     *-intelmicemul-*)
 963       # In this case we expect offload compiler to be built as native, so we
 964       # need to rename the driver to avoid clashes with host's drivers.
 965       program_transform_name="s&^&${target}-&" ;;
 966   esac
 967   sedscript="s#${target_noncanonical}#${enable_as_accelerator_for}-accel-${target_noncanonical}#"
 968   program_transform_name=`echo $program_transform_name | sed $sedscript`
 969   accel_dir_suffix=/accel/${target_noncanonical}
 970   real_target_noncanonical=${enable_as_accelerator_for}
 971 fi
 972 AC_SUBST(enable_as_accelerator)
 973 AC_SUBST(real_target_noncanonical)
 974 AC_SUBST(accel_dir_suffix)
 975
 976 for tgt in `echo $enable_offload_targets | sed 's/,/ /g'`; do
 977   tgt=`echo $tgt | sed 's/=.*//'`
 978
 979   if echo "$tgt" | grep "^hsa" > /dev/null ; then
 980     enable_hsa=1
 981   else
 982     enable_offloading=1
 983   fi
 984
 985   if test x"$offload_targets" = x; then
 986     offload_targets=$tgt
 987   else
 988     offload_targets="$offload_targets,$tgt"
 989   fi
 990 done
 991 AC_DEFINE_UNQUOTED(OFFLOAD_TARGETS, "$offload_targets",
 992   [Define to offload targets, separated by commas.])
 993 if test x"$enable_offloading" != x; then
 994   AC_DEFINE(ENABLE_OFFLOADING, 1,
 995     [Define this to enable support for offloading.])
 996 else
 997   AC_DEFINE(ENABLE_OFFLOADING, 0,
 998     [Define this to enable support for offloading.])
 999 fi
1000
1001 if test x"$enable_hsa" = x1 ; then
1002   AC_DEFINE(ENABLE_HSA, 1,
1003     [Define this to enable support for generating HSAIL.])
1004 fi
1005
1006 AC_ARG_WITH(multilib-list,
1007 [AS_HELP_STRING([--with-multilib-list], [select multilibs (AArch64, SH and x86-64 only)])],
1008 :,
1009 with_multilib_list=default)
1010
1011 # -------------------------
1012 # Checks for other programs
1013 # -------------------------
1014
1015 AC_PROG_MAKE_SET
1016
1017 # Find some useful tools
1018 AC_PROG_AWK
1019 # We need awk to create options.c and options.h.
1020 # Bail out if it's missing.
1021 case ${AWK} in
1022   "") AC_MSG_ERROR([can't build without awk, bailing out]) ;;
1023 esac
1024
1025 gcc_AC_PROG_LN_S
1026 ACX_PROG_LN($LN_S)
1027 AC_PROG_RANLIB
1028 ranlib_flags=""
1029 AC_SUBST(ranlib_flags)
1030
1031 gcc_AC_PROG_INSTALL
1032
1033 # See if cmp has --ignore-initial.
1034 gcc_AC_PROG_CMP_IGNORE_INITIAL
1035
1036 # See if we have the mktemp command.
1037 AC_CHECK_PROG(have_mktemp_command, mktemp, yes, no)
1038
1039 # See if makeinfo has been installed and is modern enough
1040 # that we can use it.
1041 ACX_CHECK_PROG_VER(MAKEINFO, makeinfo, --version,
1042   [GNU texinfo.* \([0-9][0-9.]*\)],
1043   [4.[7-9]*|4.[1-9][0-9]*|[5-9]*|[1-9][0-9]*])
1044 if test $gcc_cv_prog_makeinfo_modern = no; then
1045   AC_MSG_WARN([
1046 *** Makeinfo is missing or too old.
1047 *** Info documentation will not be built.])
1048   BUILD_INFO=
1049 else
1050   BUILD_INFO=info
1051 fi
1052 AC_SUBST(BUILD_INFO)
1053
1054 # Is pod2man recent enough to regenerate manpages?
1055 AC_MSG_CHECKING([for recent Pod::Man])
1056 if (perl -e 'use 1.10 Pod::Man') >/dev/null 2>&1; then
1057   AC_MSG_RESULT(yes)
1058   GENERATED_MANPAGES=generated-manpages
1059 else
1060   AC_MSG_RESULT(no)
1061   GENERATED_MANPAGES=
1062 fi
1063 AC_SUBST(GENERATED_MANPAGES)
1064
1065 MISSING="${CONFIG_SHELL-/bin/sh} $ac_aux_dir/missing"
1066
1067 # How about lex?
1068 dnl Don't use AC_PROG_LEX; we insist on flex.
1069 dnl LEXLIB is not useful in gcc.
1070 AC_CHECK_PROGS([FLEX], flex, [$MISSING flex])
1071
1072 # Bison?
1073 AC_CHECK_PROGS([BISON], bison, [$MISSING bison])
1074
1075 # Binutils are not build modules, unlike bison/flex/makeinfo.  So we
1076 # check for build == host before using them.
1077
1078 # NM
1079 if test x${build} = x${host} && test -f $srcdir/../binutils/nm.c \
1080   && test -d ../binutils ; then
1081   NM='${objdir}/../binutils/nm-new'
1082 else
1083   AC_CHECK_PROG(NM, nm, nm, ${CONFIG_SHELL-/bin/sh} ${srcdir}/../missing nm)
1084 fi
1085
1086 # AR
1087 if test x${build} = x${host} && test -f $srcdir/../binutils/ar.c \
1088   && test -d ../binutils ; then
1089   AR='${objdir}/../binutils/ar'
1090 else
1091   AC_CHECK_PROG(AR, ar, ar, ${CONFIG_SHELL-/bin/sh} ${srcdir}/../missing ar)
1092 fi
1093
1094 # The jit documentation looks better if built with sphinx, but can be
1095 # built with texinfo if sphinx is not available.
1096 # Set "doc_build_sys" to "sphinx" or "texinfo" accordingly.
1097 AC_CHECK_PROG(doc_build_sys, sphinx-build, sphinx, texinfo)
1098
1099 # --------------------
1100 # Checks for C headers
1101 # --------------------
1102
1103 # Need to reject headers which give warnings, so that the -Werror bootstrap
1104 # works later. *sigh*  This needs to come before all header checks.
1105 AC_PROG_CPP_WERROR
1106
1107 AC_HEADER_STDC
1108 AC_HEADER_TIME
1109 ACX_HEADER_STRING
1110 AC_HEADER_SYS_WAIT
1111 AC_HEADER_TIOCGWINSZ
1112 AC_CHECK_HEADERS(limits.h stddef.h string.h strings.h stdlib.h time.h iconv.h \
1113                  fcntl.h ftw.h unistd.h sys/file.h sys/time.h sys/mman.h \
1114                  sys/resource.h sys/param.h sys/times.h sys/stat.h \
1115                  direct.h malloc.h langinfo.h ldfcn.h locale.h wchar.h)
1116
1117 # Check for thread headers.
1118 AC_CHECK_HEADER(thread.h, [have_thread_h=yes], [have_thread_h=])
1119 AC_CHECK_HEADER(pthread.h, [have_pthread_h=yes], [have_pthread_h=])
1120
1121 # These tests can't be done till we know if we have limits.h.
1122 gcc_AC_C_CHAR_BIT
1123 AC_C_BIGENDIAN
1124
1125 # ----------------------
1126 # Checks for C++ headers
1127 # ----------------------
1128
1129 dnl Autoconf will give an error in the configure script if there is no
1130 dnl C++ preprocessor.  Hack to prevent that.
1131 m4_pushdef([AC_MSG_ERROR], m4_defn([AC_MSG_WARN]))[]dnl
1132 AC_PROG_CXXCPP
1133 m4_popdef([AC_MSG_ERROR])[]dnl
1134
1135 AC_CHECK_HEADERS(unordered_map)
1136 AC_CHECK_HEADERS(tr1/unordered_map)
1137 AC_CHECK_HEADERS(ext/hash_map)
1138
1139 # --------
1140 # Dependency checking.
1141 # --------
1142
1143 ZW_CREATE_DEPDIR
1144 AC_CONFIG_COMMANDS([gccdepdir],[
1145   ${CONFIG_SHELL-/bin/sh} $ac_aux_dir/mkinstalldirs build/$DEPDIR
1146   for lang in $subdirs c-family common
1147   do
1148       ${CONFIG_SHELL-/bin/sh} $ac_aux_dir/mkinstalldirs $lang/$DEPDIR
1149   done], [subdirs="$subdirs" ac_aux_dir=$ac_aux_dir DEPDIR=$DEPDIR])
1150
1151 ZW_PROG_COMPILER_DEPENDENCIES([CXX])
1152
1153 # --------
1154 # UNSORTED
1155 # --------
1156
1157
1158 # These libraries may be used by collect2.
1159 # We may need a special search path to get them linked.
1160 AC_CACHE_CHECK(for collect2 libraries, gcc_cv_collect2_libs,
1161 [save_LIBS="$LIBS"
1162 for libs in '' -lld -lmld \
1163                 '-L/usr/lib/cmplrs/cc2.11 -lmld' \
1164                 '-L/usr/lib/cmplrs/cc3.11 -lmld'
1165 do
1166         LIBS="$libs"
1167         AC_TRY_LINK_FUNC(ldopen,
1168                 [gcc_cv_collect2_libs="$libs"; break])
1169 done
1170 LIBS="$save_LIBS"
1171 test -z "$gcc_cv_collect2_libs" && gcc_cv_collect2_libs='none required'])
1172 case $gcc_cv_collect2_libs in
1173         "none required")        ;;
1174         *)      COLLECT2_LIBS=$gcc_cv_collect2_libs ;;
1175 esac
1176 AC_SUBST(COLLECT2_LIBS)
1177
1178 # When building Ada code on Alpha, we need exc_resume which is usually in
1179 # -lexc.  So test for it.
1180 save_LIBS="$LIBS"
1181 LIBS=
1182 AC_SEARCH_LIBS(exc_resume, exc)
1183 GNAT_LIBEXC="$LIBS"
1184 LIBS="$save_LIBS"
1185 AC_SUBST(GNAT_LIBEXC)
1186
1187 # To support -mcpu=native on Solaris/SPARC, we need libkstat.
1188 save_LIBS="$LIBS"
1189 LIBS=
1190 AC_SEARCH_LIBS(kstat_open, kstat)
1191 EXTRA_GCC_LIBS="$LIBS"
1192 LIBS="$save_LIBS"
1193 AC_SUBST(EXTRA_GCC_LIBS)
1194
1195 # Some systems put ldexp and frexp in libm instead of libc; assume
1196 # they're both in the same place.  jcf-dump needs them.
1197 save_LIBS="$LIBS"
1198 LIBS=
1199 AC_SEARCH_LIBS(ldexp, m)
1200 LDEXP_LIB="$LIBS"
1201 LIBS="$save_LIBS"
1202 AC_SUBST(LDEXP_LIB)
1203
1204 # Use <inttypes.h> only if it exists,
1205 # doesn't clash with <sys/types.h>, declares intmax_t and defines
1206 # PRId64
1207 AC_MSG_CHECKING(for inttypes.h)
1208 AC_CACHE_VAL(gcc_cv_header_inttypes_h,
1209 [AC_COMPILE_IFELSE([AC_LANG_PROGRAM(
1210 [[#define __STDC_FORMAT_MACROS
1211 #include <sys/types.h>
1212 #include <inttypes.h>]],
1213   [[intmax_t i = -1;
1214 #ifndef PRId64
1215 choke me
1216 #endif]])],
1217   [gcc_cv_header_inttypes_h=yes],
1218   [gcc_cv_header_inttypes_h=no])])
1219 AC_MSG_RESULT($gcc_cv_header_inttypes_h)
1220 if test $gcc_cv_header_inttypes_h = yes; then
1221   AC_DEFINE(HAVE_INTTYPES_H, 1,
1222         [Define if you have a working <inttypes.h> header file.])
1223 fi
1224
1225 dnl Disabled until we have a complete test for buggy enum bitfields.
1226 dnl gcc_AC_C_ENUM_BF_UNSIGNED
1227
1228 define(gcc_UNLOCKED_FUNCS, clearerr_unlocked feof_unlocked dnl
1229   ferror_unlocked fflush_unlocked fgetc_unlocked fgets_unlocked dnl
1230   fileno_unlocked fprintf_unlocked fputc_unlocked fputs_unlocked dnl
1231   fread_unlocked fwrite_unlocked getchar_unlocked getc_unlocked dnl
1232   putchar_unlocked putc_unlocked)
1233 AC_CHECK_FUNCS(times clock kill getrlimit setrlimit atoq \
1234         popen sysconf strsignal getrusage nl_langinfo \
1235         gettimeofday mbstowcs wcswidth mmap setlocale \
1236         gcc_UNLOCKED_FUNCS madvise)
1237
1238 if test x$ac_cv_func_mbstowcs = xyes; then
1239   AC_CACHE_CHECK(whether mbstowcs works, gcc_cv_func_mbstowcs_works,
1240 [    AC_RUN_IFELSE([AC_LANG_SOURCE([[#include <stdlib.h>
1241 int main()
1242 {
1243   mbstowcs(0, "", 0);
1244   return 0;
1245 }]])],
1246     [gcc_cv_func_mbstowcs_works=yes],
1247     [gcc_cv_func_mbstowcs_works=no],
1248     [gcc_cv_func_mbstowcs_works=yes])])
1249   if test x$gcc_cv_func_mbstowcs_works = xyes; then
1250     AC_DEFINE(HAVE_WORKING_MBSTOWCS, 1,
1251   [Define this macro if mbstowcs does not crash when its
1252    first argument is NULL.])
1253   fi
1254 fi
1255
1256 AC_CHECK_TYPE(ssize_t, int)
1257 AC_CHECK_TYPE(caddr_t, char *)
1258
1259 GCC_AC_FUNC_MMAP_BLACKLIST
1260
1261 case "${host}" in
1262 *-*-*vms*)
1263   # Under VMS, vfork works very differently than on Unix. The standard test
1264   # won't work, and it isn't easily adaptable. It makes more sense to
1265   # just force it.
1266   ac_cv_func_vfork_works=yes
1267   ;;
1268 esac
1269 AC_FUNC_FORK
1270
1271 AM_ICONV
1272
1273 # Until we have in-tree GNU iconv:
1274 LIBICONV_DEP=
1275 if test -f "$LTLIBICONV"; then
1276   LIBICONV_DEP=$LTLIBICONV
1277 fi
1278 AC_SUBST(LIBICONV_DEP)
1279
1280 AM_LC_MESSAGES
1281
1282 AM_LANGINFO_CODESET
1283
1284 # We will need to find libiberty.h and ansidecl.h
1285 saved_CFLAGS="$CFLAGS"
1286 CFLAGS="$CFLAGS -I${srcdir} -I${srcdir}/../include $GMPINC"
1287 saved_CXXFLAGS="$CXXFLAGS"
1288 CXXFLAGS="$CXXFLAGS -I${srcdir} -I${srcdir}/../include $GMPINC"
1289
1290 # gcc_AC_CHECK_DECLS doesn't support overloaded functions, so use the
1291 # normal autoconf function for these.  But force definition of
1292 # HAVE_DECL_BASENAME like gcc_AC_CHECK_DECLS does, to suppress the bizarre
1293 # basename handling in libiberty.h.
1294 AC_CHECK_DECLS([basename(const char*), strstr(const char*,const char*)], , ,[
1295 #undef HAVE_DECL_BASENAME
1296 #define HAVE_DECL_BASENAME 1
1297 #include "ansidecl.h"
1298 #include "system.h"])
1299
1300 gcc_AC_CHECK_DECLS(getenv atol atoll asprintf sbrk abort atof getcwd getwd \
1301         madvise stpcpy strnlen strsignal strverscmp \
1302         strtol strtoul strtoll strtoull setenv unsetenv \
1303         errno snprintf vsnprintf vasprintf malloc realloc calloc \
1304         free getopt clock getpagesize ffs gcc_UNLOCKED_FUNCS, , ,[
1305 #include "ansidecl.h"
1306 #include "system.h"])
1307
1308 gcc_AC_CHECK_DECLS(getrlimit setrlimit getrusage, , ,[
1309 #include "ansidecl.h"
1310 #include "system.h"
1311 #ifdef HAVE_SYS_RESOURCE_H
1312 #include <sys/resource.h>
1313 #endif
1314 ])
1315
1316 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
1317 #include "ansidecl.h"
1318 #include "system.h"
1319 #ifdef HAVE_SYS_RESOURCE_H
1320 #include <sys/resource.h>
1321 #endif
1322 ]], [[rlim_t l = 0;]])],[],[AC_DEFINE([rlim_t],[long],
1323 [Define to `long' if <sys/resource.h> doesn't define.])])
1324
1325 # On AIX 5.2, <ldfcn.h> conflicts with <fcntl.h>, as both define incompatible
1326 # FREAD and FWRITE macros.  Fortunately, for GCC's single usage of ldgetname
1327 # in collect2.c, <fcntl.h> isn't visible, but the configure test below needs
1328 # to undef these macros to get the correct value for HAVE_DECL_LDGETNAME.
1329 gcc_AC_CHECK_DECLS(ldgetname, , ,[
1330 #include "ansidecl.h"
1331 #include "system.h"
1332 #ifdef HAVE_LDFCN_H
1333 #undef FREAD
1334 #undef FWRITE
1335 #include <ldfcn.h>
1336 #endif
1337 ])
1338
1339 gcc_AC_CHECK_DECLS(times, , ,[
1340 #include "ansidecl.h"
1341 #include "system.h"
1342 #ifdef HAVE_SYS_TIMES_H
1343 #include <sys/times.h>
1344 #endif
1345 ])
1346
1347 gcc_AC_CHECK_DECLS(sigaltstack, , ,[
1348 #include "ansidecl.h"
1349 #include "system.h"
1350 #include <signal.h>
1351 ])
1352
1353 # More time-related stuff.
1354 AC_CACHE_CHECK(for struct tms, ac_cv_struct_tms, [
1355 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
1356 #include "ansidecl.h"
1357 #include "system.h"
1358 #ifdef HAVE_SYS_TIMES_H
1359 #include <sys/times.h>
1360 #endif
1361 ]], [[struct tms tms;]])],[ac_cv_struct_tms=yes],[ac_cv_struct_tms=no])])
1362 if test $ac_cv_struct_tms = yes; then
1363   AC_DEFINE(HAVE_STRUCT_TMS, 1,
1364   [Define if <sys/times.h> defines struct tms.])
1365 fi
1366
1367 # use gcc_cv_* here because this doesn't match the behavior of AC_CHECK_TYPE.
1368 # revisit after autoconf 2.50.
1369 AC_CACHE_CHECK(for clock_t, gcc_cv_type_clock_t, [
1370 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
1371 #include "ansidecl.h"
1372 #include "system.h"
1373 ]], [[clock_t x;]])],[gcc_cv_type_clock_t=yes],[gcc_cv_type_clock_t=no])])
1374 if test $gcc_cv_type_clock_t = yes; then
1375   AC_DEFINE(HAVE_CLOCK_T, 1,
1376   [Define if <time.h> defines clock_t.])
1377 fi
1378
1379 # Check if F_SETLKW is supported by fcntl.
1380 AC_CACHE_CHECK(for F_SETLKW, ac_cv_f_setlkw, [
1381 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
1382 #include <fcntl.h>]], [[
1383 struct flock fl;
1384 fl.l_whence = 0;
1385 fl.l_start = 0;
1386 fl.l_len = 0;
1387 fl.l_pid = 0;
1388 return fcntl (1, F_SETLKW, &fl);]])],
1389 [ac_cv_f_setlkw=yes],[ac_cv_f_setlkw=no])])
1390 if test $ac_cv_f_setlkw = yes; then
1391   AC_DEFINE(HOST_HAS_F_SETLKW, 1,
1392   [Define if F_SETLKW supported by fcntl.])
1393 fi
1394
1395 # Restore CFLAGS, CXXFLAGS from before the gcc_AC_NEED_DECLARATIONS tests.
1396 CFLAGS="$saved_CFLAGS"
1397 CXXFLAGS="$saved_CXXFLAGS"
1398
1399 # mkdir takes a single argument on some systems.
1400 gcc_AC_FUNC_MKDIR_TAKES_ONE_ARG
1401
1402 # File extensions
1403 manext='.1'
1404 objext='.o'
1405 AC_SUBST(manext)
1406 AC_SUBST(objext)
1407
1408 # With Setjmp/Longjmp based exception handling.
1409 AC_ARG_ENABLE(sjlj-exceptions,
1410 [AS_HELP_STRING([--enable-sjlj-exceptions],
1411                 [arrange to use setjmp/longjmp exception handling])],
1412 [case $target in
1413   *-*-hpux10*)
1414     if test $enableval != yes; then
1415       AC_MSG_WARN([dwarf2 exceptions not supported, sjlj exceptions forced])
1416       enableval=yes
1417     fi
1418     ;;
1419 esac
1420 force_sjlj_exceptions=yes],
1421 [case $target in
1422   *-*-hpux10*)
1423     force_sjlj_exceptions=yes
1424     enableval=yes
1425     ;;
1426   lm32*-*-*)
1427      force_sjlj_exceptions=yes
1428      enableval=yes
1429      ;;
1430   *)
1431     force_sjlj_exceptions=no
1432     ;;
1433 esac])
1434 if test $force_sjlj_exceptions = yes; then
1435   sjlj=`if test $enableval = yes; then echo 1; else echo 0; fi`
1436   AC_DEFINE_UNQUOTED(CONFIG_SJLJ_EXCEPTIONS, $sjlj,
1437     [Define 0/1 to force the choice for exception handling model.])
1438 fi
1439
1440 # --------------------------------------------------------
1441 # Build, host, and target specific configuration fragments
1442 # --------------------------------------------------------
1443
1444 # Collect build-machine-specific information.
1445 . ${srcdir}/config.build || exit 1
1446
1447 # Collect host-machine-specific information.
1448 . ${srcdir}/config.host || exit 1
1449
1450 target_gtfiles=
1451
1452 # Collect target-machine-specific information.
1453 . ${srcdir}/config.gcc || exit 1
1454
1455 extra_objs="${host_extra_objs} ${extra_objs}"
1456 extra_gcc_objs="${host_extra_gcc_objs} ${extra_gcc_objs}"
1457
1458 # Default the target-machine variables that were not explicitly set.
1459 if test x"$tm_file" = x
1460 then tm_file=$cpu_type/$cpu_type.h; fi
1461
1462 if test x"$extra_headers" = x
1463 then extra_headers=; fi
1464
1465 if test x$md_file = x
1466 then md_file=$cpu_type/$cpu_type.md; fi
1467
1468 if test x$out_file = x
1469 then out_file=$cpu_type/$cpu_type.c; fi
1470
1471 if test x"$tmake_file" = x
1472 then tmake_file=$cpu_type/t-$cpu_type
1473 fi
1474
1475 # Support --enable-initfini-array.
1476 if test x$enable_initfini_array != xno; then
1477   tm_file="${tm_file} initfini-array.h"
1478 fi
1479
1480 if test x"$dwarf2" = xyes
1481 then tm_file="$tm_file tm-dwarf2.h"
1482 fi
1483
1484 # Say what files are being used for the output code and MD file.
1485 echo "Using \`$srcdir/config/$out_file' for machine-specific logic."
1486 echo "Using \`$srcdir/config/$md_file' as machine description file."
1487
1488 # If any of the xm_file variables contain nonexistent files, warn
1489 # about them and drop them.
1490
1491 bx=
1492 for x in $build_xm_file; do
1493   if    test -f $srcdir/config/$x
1494   then      bx="$bx $x"
1495   else      AC_MSG_WARN($srcdir/config/$x does not exist.)
1496   fi
1497 done
1498 build_xm_file="$bx"
1499
1500 hx=
1501 for x in $host_xm_file; do
1502   if    test -f $srcdir/config/$x
1503   then      hx="$hx $x"
1504   else      AC_MSG_WARN($srcdir/config/$x does not exist.)
1505   fi
1506 done
1507 host_xm_file="$hx"
1508
1509 tx=
1510 for x in $xm_file; do
1511   if    test -f $srcdir/config/$x
1512   then      tx="$tx $x"
1513   else      AC_MSG_WARN($srcdir/config/$x does not exist.)
1514   fi
1515 done
1516 xm_file="$tx"
1517
1518 count=a
1519 for f in $tm_file; do
1520         count=${count}x
1521 done
1522 if test $count = ax; then
1523         echo "Using \`$srcdir/config/$tm_file' as target machine macro file."
1524 else
1525         echo "Using the following target machine macro files:"
1526         for f in $tm_file; do
1527                 echo "  $srcdir/config/$f"
1528         done
1529 fi
1530
1531 if test x$use_long_long_for_widest_fast_int = xyes; then
1532         AC_DEFINE(USE_LONG_LONG_FOR_WIDEST_FAST_INT, 1,
1533 [Define to 1 if the 'long long' type is wider than 'long' but still
1534 efficiently supported by the host hardware.])
1535 fi
1536
1537 gnu_ld_bool=`if test x"$gnu_ld" = x"yes"; then echo 1; else echo 0; fi`
1538 AC_DEFINE_UNQUOTED(HAVE_GNU_LD, $gnu_ld_bool, [Define to 1 if using GNU ld.])
1539
1540 gnu_as_bool=`if test x"$gas" = x"yes"; then echo 1; else echo 0; fi`
1541 AC_DEFINE_UNQUOTED(HAVE_GNU_AS, $gnu_as_bool, [Define to 1 if using GNU as.])
1542
1543 count=a
1544 for f in $host_xm_file; do
1545         count=${count}x
1546 done
1547 if test $count = a; then
1548         :
1549 elif test $count = ax; then
1550         echo "Using \`$srcdir/config/$host_xm_file' as host machine macro file."
1551 else
1552         echo "Using the following host machine macro files:"
1553         for f in $host_xm_file; do
1554                 echo "  $srcdir/config/$f"
1555         done
1556 fi
1557 echo "Using ${out_host_hook_obj} for host machine hooks."
1558
1559 if test "$host_xm_file" != "$build_xm_file"; then
1560         count=a
1561         for f in $build_xm_file; do
1562                 count=${count}x
1563         done
1564         if test $count = a; then
1565                 :
1566         elif test $count = ax; then
1567                 echo "Using \`$srcdir/config/$build_xm_file' as build machine macro file."
1568         else
1569                 echo "Using the following build machine macro files:"
1570                 for f in $build_xm_file; do
1571                         echo "  $srcdir/config/$f"
1572                 done
1573         fi
1574 fi
1575
1576 if test -n "$configured_native_system_header_dir"; then
1577   native_system_header_dir=$configured_native_system_header_dir
1578 fi
1579 NATIVE_SYSTEM_HEADER_DIR="$native_system_header_dir"
1580 AC_SUBST(NATIVE_SYSTEM_HEADER_DIR)
1581
1582 case ${host} in
1583   powerpc*-*-darwin*)
1584     AC_CACHE_CHECK([whether mcontext_t fields have underscores],
1585       gcc_cv_mcontext_underscores,
1586       AC_COMPILE_IFELSE([
1587 #include <sys/cdefs.h>
1588 #include <sys/signal.h>
1589 #include <ucontext.h>
1590 int main() { mcontext_t m; if (m->ss.srr0) return 0; return 0; }
1591 ],
1592         gcc_cv_mcontext_underscores=no, gcc_cv_mcontext_underscores=yes))
1593       if test $gcc_cv_mcontext_underscores = yes; then
1594         AC_DEFINE(HAS_MCONTEXT_T_UNDERSCORES,,dnl
1595           [mcontext_t fields start with __])
1596       fi
1597     ;;
1598 esac
1599
1600 # ---------
1601 # Threading
1602 # ---------
1603
1604 # Check if a valid thread package
1605 case ${enable_threads} in
1606   "" | no)
1607     # No threads
1608     target_thread_file='single'
1609     ;;
1610   yes)
1611     # default
1612     target_thread_file='single'
1613     ;;
1614   aix | dce | lynx | mipssde | posix | rtems | \
1615   single | tpf | vxworks | win32)
1616     target_thread_file=${enable_threads}
1617     ;;
1618   *)
1619     echo "${enable_threads} is an unknown thread package" 1>&2
1620     exit 1
1621     ;;
1622 esac
1623
1624 if test x${thread_file} = x; then
1625   # No thread file set by target-specific clauses in config.gcc,
1626   # so use file chosen by default logic above
1627   thread_file=${target_thread_file}
1628 fi
1629
1630 # --------
1631 # UNSORTED
1632 # --------
1633
1634 use_cxa_atexit=no
1635 if test x$enable___cxa_atexit = xyes || \
1636    test x$enable___cxa_atexit = x -a x$default_use_cxa_atexit = xyes; then
1637   if test x$host = x$target; then
1638     case $host in
1639       # mingw32 doesn't have __cxa_atexit but uses atexit registration
1640       # keyed to flag_use_cxa_atexit
1641       *-*-mingw32*)
1642         use_cxa_atexit=yes
1643         ;;
1644       powerpc-ibm-aix*)
1645         use_cxa_atexit=yes
1646         ;;
1647       *)
1648         AC_CHECK_FUNC(__cxa_atexit,[use_cxa_atexit=yes],
1649           [echo "__cxa_atexit can't be enabled on this target"])
1650         ;;
1651     esac
1652   else
1653     # We can't check for __cxa_atexit when building a cross, so assume
1654     # it is available
1655     use_cxa_atexit=yes
1656   fi
1657   if test x$use_cxa_atexit = xyes; then
1658     AC_DEFINE(DEFAULT_USE_CXA_ATEXIT, 2,
1659       [Define if you want to use __cxa_atexit, rather than atexit, to
1660       register C++ destructors for local statics and global objects.
1661       This is essential for fully standards-compliant handling of
1662       destructors, but requires __cxa_atexit in libc.])
1663   fi
1664 fi
1665
1666 # Look for a file containing extra machine modes.
1667 if test -n "$extra_modes" && test -f $srcdir/config/$extra_modes; then
1668   extra_modes_file='$(srcdir)'/config/${extra_modes}
1669   AC_SUBST(extra_modes_file)
1670   AC_DEFINE_UNQUOTED(EXTRA_MODES_FILE, "config/$extra_modes",
1671   [Define to the name of a file containing a list of extra machine modes
1672    for this architecture.])
1673 fi
1674
1675 # Convert extra_options into a form suitable for Makefile use.
1676 extra_opt_files=
1677 all_opt_files=
1678 for f in $extra_options; do
1679   extra_opt_files="$extra_opt_files \$(srcdir)/config/$f"
1680   all_opt_files="$all_opt_files $srcdir/config/$f"
1681 done
1682 AC_SUBST(extra_opt_files)
1683
1684 # auto-host.h is the file containing items generated by autoconf and is
1685 # the first file included by config.h.
1686 # If host=build, it is correct to have bconfig include auto-host.h
1687 # as well.  If host!=build, we are in error and need to do more
1688 # work to find out the build config parameters.
1689 if test x$host = x$build
1690 then
1691         build_auto=auto-host.h
1692 else
1693         # We create a subdir, then run autoconf in the subdir.
1694         # To prevent recursion we set host and build for the new
1695         # invocation of configure to the build for this invocation
1696         # of configure.
1697         tempdir=build.$$
1698         rm -rf $tempdir
1699         mkdir $tempdir
1700         cd $tempdir
1701         case ${srcdir} in
1702         /* | [A-Za-z]:[\\/]* ) realsrcdir=${srcdir};;
1703         *) realsrcdir=../${srcdir};;
1704         esac
1705         # Clearing GMPINC is necessary to prevent host headers being
1706         # used by the build compiler.  Defining GENERATOR_FILE stops
1707         # system.h from including gmp.h.
1708         CC="${CC_FOR_BUILD}" CFLAGS="${CFLAGS_FOR_BUILD}" \
1709         CXX="${CXX_FOR_BUILD}" CXXFLAGS="${CXXFLAGS_FOR_BUILD}" \
1710         LD="${LD_FOR_BUILD}" LDFLAGS="${LDFLAGS_FOR_BUILD}" \
1711         GMPINC="" CPPFLAGS="${CPPFLAGS} -DGENERATOR_FILE" \
1712         ${realsrcdir}/configure \
1713                 --enable-languages=${enable_languages-all} \
1714                 --target=$target_alias --host=$build_alias --build=$build_alias
1715
1716         # We just finished tests for the build machine, so rename
1717         # the file auto-build.h in the gcc directory.
1718         mv auto-host.h ../auto-build.h
1719         cd ..
1720         rm -rf $tempdir
1721         build_auto=auto-build.h
1722 fi
1723 AC_SUBST(build_subdir)
1724
1725 tm_file="${tm_file} defaults.h"
1726 tm_p_file="${tm_p_file} tm-preds.h"
1727 host_xm_file="auto-host.h ansidecl.h ${host_xm_file}"
1728 build_xm_file="${build_auto} ansidecl.h ${build_xm_file}"
1729 # We don't want ansidecl.h in target files, write code there in ISO/GNU C.
1730 # put this back in temporarily.
1731 xm_file="auto-host.h ansidecl.h ${xm_file}"
1732
1733 # --------
1734 # UNSORTED
1735 # --------
1736
1737 changequote(,)dnl
1738 # Compile in configure arguments.
1739 if test -f configargs.h ; then
1740         # Being re-configured.
1741         gcc_config_arguments=`grep configuration_arguments configargs.h | sed -e 's/.*"\([^"]*\)".*/\1/'`
1742         gcc_config_arguments="$gcc_config_arguments : (reconfigured) $TOPLEVEL_CONFIGURE_ARGUMENTS"
1743 else
1744         gcc_config_arguments="$TOPLEVEL_CONFIGURE_ARGUMENTS"
1745 fi
1746
1747 # Double all backslashes and backslash all quotes to turn
1748 # gcc_config_arguments into a C string.
1749 sed -e 's/\\/\\\\/g; s/"/\\"/g' <<EOF >conftest.out
1750 $gcc_config_arguments
1751 EOF
1752 gcc_config_arguments_str=`cat conftest.out`
1753 rm -f conftest.out
1754
1755 cat > configargs.h <<EOF
1756 /* Generated automatically. */
1757 static const char configuration_arguments[] = "$gcc_config_arguments_str";
1758 static const char thread_model[] = "$thread_file";
1759
1760 static const struct {
1761   const char *name, *value;
1762 } configure_default_options[] = $configure_default_options;
1763 EOF
1764 changequote([,])dnl
1765
1766 changequote(,)dnl
1767 gcc_BASEVER=`cat $srcdir/BASE-VER`
1768 gcc_DEVPHASE=`cat $srcdir/DEV-PHASE`
1769 gcc_DATESTAMP=`cat $srcdir/DATESTAMP`
1770 if test -f $srcdir/REVISION ; then
1771         gcc_REVISION=`cat $srcdir/REVISION`
1772 else
1773         gcc_REVISION=""
1774 fi
1775 cat > plugin-version.h <<EOF
1776 #include "configargs.h"
1777
1778 #define GCCPLUGIN_VERSION_MAJOR   `echo $gcc_BASEVER | sed -e 's/^\([0-9]*\).*$/\1/'`
1779 #define GCCPLUGIN_VERSION_MINOR   `echo $gcc_BASEVER | sed -e 's/^[0-9]*\.\([0-9]*\).*$/\1/'`
1780 #define GCCPLUGIN_VERSION_PATCHLEVEL   `echo $gcc_BASEVER | sed -e 's/^[0-9]*\.[0-9]*\.\([0-9]*\)$/\1/'`
1781 #define GCCPLUGIN_VERSION  (GCCPLUGIN_VERSION_MAJOR*1000 + GCCPLUGIN_VERSION_MINOR)
1782
1783 static char basever[] = "$gcc_BASEVER";
1784 static char datestamp[] = "$gcc_DATESTAMP";
1785 static char devphase[] = "$gcc_DEVPHASE";
1786 static char revision[] = "$gcc_REVISION";
1787
1788 /* FIXME plugins: We should make the version information more precise.
1789    One way to do is to add a checksum. */
1790
1791 static struct plugin_gcc_version gcc_version = {basever, datestamp,
1792                                                 devphase, revision,
1793                                                 configuration_arguments};
1794 EOF
1795 changequote([,])dnl
1796
1797 # Determine what GCC version number to use in filesystem paths.
1798 GCC_BASE_VER
1799
1800 # Internationalization
1801 ZW_GNU_GETTEXT_SISTER_DIR
1802
1803 # If LIBINTL contains LIBICONV, then clear LIBICONV so we don't get
1804 # -liconv on the link line twice.
1805 case "$LIBINTL" in *$LIBICONV*)
1806         LIBICONV= ;;
1807 esac
1808
1809 AC_ARG_ENABLE(secureplt,
1810 [AS_HELP_STRING([--enable-secureplt],
1811                 [enable -msecure-plt by default for PowerPC])],
1812 [], [])
1813
1814 AC_ARG_ENABLE(mingw-wildcard,
1815 [AS_HELP_STRING([--enable-mingw-wildcard],
1816                 [Set whether to expand wildcard on command-line.
1817                  Default to platform configuration])],
1818 [],[enable_mingw_wildcard=platform])
1819 AS_IF([test x"$enable_mingw_wildcard" != xplatform ],
1820       [AC_DEFINE_UNQUOTED(MINGW_DOWILDCARD,
1821                  $(test x"$enable_mingw_wildcard" = xno; echo $?),
1822                  [Value to set mingw's _dowildcard to.])])
1823
1824 AC_ARG_ENABLE(leading-mingw64-underscores,
1825   AS_HELP_STRING([--enable-leading-mingw64-underscores],
1826                  [enable leading underscores on 64 bit mingw targets]),
1827   [],[])
1828 AS_IF([ test x"$enable_leading_mingw64_underscores" = xyes ],
1829   [AC_DEFINE(USE_MINGW64_LEADING_UNDERSCORES, 1,
1830     [Define if we should use leading underscore on 64 bit mingw targets])])
1831
1832 AC_ARG_ENABLE(cld,
1833 [AS_HELP_STRING([--enable-cld], [enable -mcld by default for 32bit x86])], [],
1834 [enable_cld=no])
1835
1836 AC_ARG_ENABLE(frame-pointer,
1837 [AS_HELP_STRING([--enable-frame-pointer],
1838                 [enable -fno-omit-frame-pointer by default for 32bit x86])], [],
1839 [
1840 case $target_os in
1841 linux* | darwin[[8912]]*)
1842   # Enable -fomit-frame-pointer by default for Linux and Darwin with
1843   # DWARF2.
1844   enable_frame_pointer=no
1845   ;;
1846 *)
1847   enable_frame_pointer=yes
1848   ;;
1849 esac
1850 ])
1851
1852 # Windows32 Registry support for specifying GCC installation paths.
1853 AC_ARG_ENABLE(win32-registry,
1854 [AS_HELP_STRING([--disable-win32-registry],
1855                 [disable lookup of installation paths in the
1856                  Registry on Windows hosts])
1857 AS_HELP_STRING([--enable-win32-registry], [enable registry lookup (default)])
1858 AS_HELP_STRING([--enable-win32-registry=KEY],
1859                [use KEY instead of GCC version as the last portion
1860                 of the registry key])],,)
1861
1862 case $host_os in
1863   win32 | pe | cygwin* | mingw32*)
1864     if test "x$enable_win32_registry" != xno; then
1865       AC_SEARCH_LIBS(RegOpenKeyExA, advapi32,, [enable_win32_registry=no])
1866     fi
1867
1868     if test "x$enable_win32_registry" != xno; then
1869       AC_DEFINE(ENABLE_WIN32_REGISTRY, 1,
1870   [Define to 1 if installation paths should be looked up in the Windows
1871    Registry. Ignored on non-Windows hosts.])
1872
1873       if test "x$enable_win32_registry" != xyes \
1874          && test "x$enable_win32_registry" != x; then
1875         AC_DEFINE_UNQUOTED(WIN32_REGISTRY_KEY, "$enable_win32_registry",
1876   [Define to be the last component of the Windows registry key under which
1877    to look for installation paths.  The full key used will be
1878    HKEY_LOCAL_MACHINE/SOFTWARE/Free Software Foundation/{WIN32_REGISTRY_KEY}.
1879    The default is the GCC version number.])
1880       fi
1881     fi
1882   ;;
1883 esac
1884
1885 # Get an absolute path to the GCC top-level source directory
1886 holddir=`${PWDCMD-pwd}`
1887 cd $srcdir
1888 topdir=`${PWDCMD-pwd}`
1889 cd $holddir
1890
1891 # Conditionalize the makefile for this host machine.
1892 xmake_file=
1893 for f in ${host_xmake_file}
1894 do
1895         if test -f ${srcdir}/config/$f
1896         then
1897                 xmake_file="${xmake_file} \$(srcdir)/config/$f"
1898         fi
1899 done
1900
1901 # Conditionalize the makefile for this target machine.
1902 tmake_file_=
1903 for f in ${tmake_file}
1904 do
1905         if test -f ${srcdir}/config/$f
1906         then
1907                 tmake_file_="${tmake_file_} \$(srcdir)/config/$f"
1908         fi
1909 done
1910 tmake_file="${tmake_file_}"
1911
1912 out_object_file=`basename $out_file .c`.o
1913 common_out_object_file=`basename $common_out_file .c`.o
1914
1915 tm_file_list="options.h"
1916 tm_include_list="options.h insn-constants.h"
1917 for f in $tm_file; do
1918   case $f in
1919     ./* )
1920        f=`echo $f | sed 's/^..//'`
1921        tm_file_list="${tm_file_list} $f"
1922        tm_include_list="${tm_include_list} $f"
1923        ;;
1924     defaults.h )
1925        tm_file_list="${tm_file_list} \$(srcdir)/$f"
1926        tm_include_list="${tm_include_list} $f"
1927        ;;
1928     * )
1929        tm_file_list="${tm_file_list} \$(srcdir)/config/$f"
1930        tm_include_list="${tm_include_list} config/$f"
1931        ;;
1932   esac
1933 done
1934
1935 tm_p_file_list=
1936 tm_p_include_list=
1937 for f in $tm_p_file; do
1938   case $f in
1939     tm-preds.h )
1940        tm_p_file_list="${tm_p_file_list} $f"
1941        tm_p_include_list="${tm_p_include_list} $f"
1942        ;;
1943     * )
1944        tm_p_file_list="${tm_p_file_list} \$(srcdir)/config/$f"
1945        tm_p_include_list="${tm_p_include_list} config/$f"
1946   esac
1947 done
1948
1949 xm_file_list=
1950 xm_include_list=
1951 for f in $xm_file; do
1952   case $f in
1953     ansidecl.h )
1954        xm_file_list="${xm_file_list} \$(srcdir)/../include/$f"
1955        xm_include_list="${xm_include_list} $f"
1956        ;;
1957     auto-host.h )
1958        xm_file_list="${xm_file_list} $f"
1959        xm_include_list="${xm_include_list} $f"
1960        ;;
1961     * )
1962        xm_file_list="${xm_file_list} \$(srcdir)/config/$f"
1963        xm_include_list="${xm_include_list} config/$f"
1964        ;;
1965   esac
1966 done
1967
1968 host_xm_file_list=
1969 host_xm_include_list=
1970 for f in $host_xm_file; do
1971   case $f in
1972     ansidecl.h )
1973        host_xm_file_list="${host_xm_file_list} \$(srcdir)/../include/$f"
1974        host_xm_include_list="${host_xm_include_list} $f"
1975        ;;
1976     auto-host.h )
1977        host_xm_file_list="${host_xm_file_list} $f"
1978        host_xm_include_list="${host_xm_include_list} $f"
1979        ;;
1980     * )
1981        host_xm_file_list="${host_xm_file_list} \$(srcdir)/config/$f"
1982        host_xm_include_list="${host_xm_include_list} config/$f"
1983        ;;
1984   esac
1985 done
1986
1987 build_xm_file_list=
1988 for f in $build_xm_file; do
1989   case $f in
1990     ansidecl.h )
1991        build_xm_file_list="${build_xm_file_list} \$(srcdir)/../include/$f"
1992        build_xm_include_list="${build_xm_include_list} $f"
1993        ;;
1994     auto-build.h | auto-host.h )
1995        build_xm_file_list="${build_xm_file_list} $f"
1996        build_xm_include_list="${build_xm_include_list} $f"
1997        ;;
1998     * )
1999        build_xm_file_list="${build_xm_file_list} \$(srcdir)/config/$f"
2000        build_xm_include_list="${build_xm_include_list} config/$f"
2001        ;;
2002   esac
2003 done
2004
2005 # Define macro CROSS_DIRECTORY_STRUCTURE in compilation if this is a
2006 # cross-compiler which does not use the native headers and libraries.
2007 # Also use all.cross instead of all.internal and adjust SYSTEM_HEADER_DIR.
2008 CROSS=                                          AC_SUBST(CROSS)
2009 ALL=all.internal                                AC_SUBST(ALL)
2010 SYSTEM_HEADER_DIR='$(NATIVE_SYSTEM_HEADER_DIR)' AC_SUBST(SYSTEM_HEADER_DIR)
2011 BUILD_SYSTEM_HEADER_DIR=$SYSTEM_HEADER_DIR      AC_SUBST(BUILD_SYSTEM_HEADER_DIR)
2012
2013 if test x$host != x$target || test "x$TARGET_SYSTEM_ROOT" != x ||
2014    test x$build != x$host || test "x$with_build_sysroot" != x; then
2015   if test "x$with_build_sysroot" != x; then
2016     BUILD_SYSTEM_HEADER_DIR=$with_build_sysroot'$${sysroot_headers_suffix}$(NATIVE_SYSTEM_HEADER_DIR)'
2017   else
2018     BUILD_SYSTEM_HEADER_DIR='$(CROSS_SYSTEM_HEADER_DIR)'
2019   fi
2020
2021   if test x$host != x$target
2022   then
2023     CROSS="-DCROSS_DIRECTORY_STRUCTURE"
2024     ALL=all.cross
2025     SYSTEM_HEADER_DIR=$BUILD_SYSTEM_HEADER_DIR
2026   elif test "x$TARGET_SYSTEM_ROOT" != x; then
2027     SYSTEM_HEADER_DIR='$(CROSS_SYSTEM_HEADER_DIR)'
2028   fi
2029
2030   if test "x$with_build_sysroot" != "x"; then
2031     target_header_dir="${with_build_sysroot}${native_system_header_dir}"
2032   elif test "x$with_sysroot" = x; then
2033     target_header_dir="${test_exec_prefix}/${target_noncanonical}/sys-include"
2034   elif test "x$with_sysroot" = xyes; then
2035     target_header_dir="${test_exec_prefix}/${target_noncanonical}/sys-root${native_system_header_dir}"
2036   else
2037     target_header_dir="${with_sysroot}${native_system_header_dir}"
2038   fi
2039 else
2040   target_header_dir=${native_system_header_dir}
2041 fi
2042
2043 # If this is a cross-compiler that does not
2044 # have its own set of headers then define
2045 # inhibit_libc
2046
2047 # If this is using newlib, without having the headers available now,
2048 # then define inhibit_libc in LIBGCC2_CFLAGS.
2049 # This prevents libgcc2 from containing any code which requires libc
2050 # support.
2051 : ${inhibit_libc=false}
2052 if { { test x$host != x$target && test "x$with_sysroot" = x ; } ||
2053        test x$with_newlib = xyes ; } &&
2054      { test "x$with_headers" = xno || test ! -f "$target_header_dir/stdio.h"; } ; then
2055        inhibit_libc=true
2056 fi
2057 AC_SUBST(inhibit_libc)
2058
2059 # When building gcc with a cross-compiler, we need to adjust things so
2060 # that the generator programs are still built with the native compiler.
2061 # Also, we cannot run fixincludes.
2062
2063 # These are the normal (build=host) settings:
2064 CC_FOR_BUILD='$(CC)'            AC_SUBST(CC_FOR_BUILD)
2065 CXX_FOR_BUILD='$(CXX)'          AC_SUBST(CXX_FOR_BUILD)
2066 BUILD_CFLAGS='$(ALL_CFLAGS)'    AC_SUBST(BUILD_CFLAGS)
2067 BUILD_CXXFLAGS='$(ALL_CXXFLAGS)' AC_SUBST(BUILD_CXXFLAGS)
2068 BUILD_LDFLAGS='$(LDFLAGS)'      AC_SUBST(BUILD_LDFLAGS)
2069 STMP_FIXINC=stmp-fixinc         AC_SUBST(STMP_FIXINC)
2070
2071 BUILD_NO_PIE_CFLAGS='$(NO_PIE_CFLAGS)' AC_SUBST(BUILD_NO_PIE_CFLAGS)
2072 BUILD_NO_PIE_FLAG='$(NO_PIE_FLAG)' AC_SUBST(BUILD_NO_PIE_FLAG)
2073
2074 # And these apply if build != host, or we are generating coverage data
2075 if test x$build != x$host || test "x$coverage_flags" != x
2076 then
2077     BUILD_CFLAGS='$(INTERNAL_CFLAGS) $(T_CFLAGS) $(CFLAGS_FOR_BUILD)'
2078     BUILD_CXXFLAGS='$(INTERNAL_CFLAGS) $(T_CFLAGS) $(CXXFLAGS_FOR_BUILD)'
2079     BUILD_LDFLAGS='$(LDFLAGS_FOR_BUILD)'
2080
2081     NO_PIE_CFLAGS_FOR_BUILD=${NO_PIE_CFLAGS_FOR_BUILD-${NO_PIE_CFLAGS}}
2082     NO_PIE_FLAG_FOR_BUILD=${NO_PIE_FLAG_FOR_BUILD-${NO_PIE_FLAG}}
2083     BUILD_NO_PIE_CFLAGS='$(NO_PIE_CFLAGS_FOR_BUILD)'
2084     BUILD_NO_PIE_FLAG='$(NO_PIE_FLAG_FOR_BUILD)'
2085 fi
2086 AC_SUBST(NO_PIE_CFLAGS_FOR_BUILD)
2087 AC_SUBST(NO_PIE_FLAG_FOR_BUILD)
2088
2089 # Expand extra_headers to include complete path.
2090 # This substitutes for lots of t-* files.
2091 extra_headers_list=
2092 # Prepend $(srcdir)/config/${cpu_type}/ to every entry in extra_headers.
2093 for file in ${extra_headers} ; do
2094   extra_headers_list="${extra_headers_list} \$(srcdir)/config/${cpu_type}/${file}"
2095 done
2096
2097 # If use_gcc_tgmath is set, append ginclude/tgmath.h.
2098 if test x"$use_gcc_tgmath" = xyes
2099 then extra_headers_list="${extra_headers_list} \$(srcdir)/ginclude/tgmath.h"
2100 fi
2101
2102 # Define collect2 in Makefile.
2103 case $host_can_use_collect2 in
2104   no) collect2= ;;
2105   *) collect2='collect2$(exeext)' ;;
2106 esac
2107 AC_SUBST([collect2])
2108
2109 # Add a definition of USE_COLLECT2 if system wants one.
2110 case $use_collect2 in
2111   no) use_collect2= ;;
2112   "") ;;
2113   *)
2114     host_xm_defines="${host_xm_defines} USE_COLLECT2"
2115     xm_defines="${xm_defines} USE_COLLECT2"
2116     case $host_can_use_collect2 in
2117       no)
2118         AC_MSG_ERROR([collect2 is required but cannot be built on this system])
2119         ;;
2120     esac
2121     ;;
2122 esac
2123
2124 AC_DEFINE_UNQUOTED(LTOPLUGINSONAME,"${host_lto_plugin_soname}",
2125 [Define to the name of the LTO plugin DSO that must be
2126   passed to the linker's -plugin=LIB option.])
2127
2128 # ---------------------------
2129 # Assembler & linker features
2130 # ---------------------------
2131
2132 # During stage 2, ld is actually gcc/collect-ld, which is a small script to
2133 # discern between when to use prev-ld/ld-new and when to use ld/ld-new.
2134 # However when ld-new is first executed from the build tree, libtool will
2135 # relink it as .libs/lt-ld-new, so that it can give it an RPATH that refers
2136 # to the build tree.  While doing this we need to use the previous-stage
2137 # linker, or we have an infinite loop.  The presence of a shell script as
2138 # ld/ld-new, and the fact that the script *uses ld itself*, is what confuses
2139 # the gcc/collect-ld script.  So we need to know how libtool works, or
2140 # exec-tool will fail.
2141
2142 m4_defun([_LT_CONFIG_COMMANDS], [])
2143 AC_PROG_LIBTOOL
2144 AC_SUBST(objdir)
2145 AC_SUBST(enable_fast_install)
2146
2147 # Identify the assembler which will work hand-in-glove with the newly
2148 # built GCC, so that we can examine its features.  This is the assembler
2149 # which will be driven by the driver program.
2150 #
2151 # If build != host, and we aren't building gas in-tree, we identify a
2152 # build->target assembler and hope that it will have the same features
2153 # as the host->target assembler we'll be using.
2154 gcc_cv_gas_major_version=
2155 gcc_cv_gas_minor_version=
2156 gcc_cv_as_gas_srcdir=`echo $srcdir | sed -e 's,/gcc$,,'`/gas
2157
2158 m4_pattern_allow([AS_FOR_TARGET])dnl
2159 AS_VAR_SET_IF(gcc_cv_as,, [
2160 if test -x "$DEFAULT_ASSEMBLER"; then
2161         gcc_cv_as="$DEFAULT_ASSEMBLER"
2162 elif test -f $gcc_cv_as_gas_srcdir/configure.ac \
2163      && test -f ../gas/Makefile \
2164      && test x$build = x$host; then
2165         gcc_cv_as=../gas/as-new$build_exeext
2166 elif test -x as$build_exeext; then
2167         # Build using assembler in the current directory.
2168         gcc_cv_as=./as$build_exeext
2169 elif ( set dummy $AS_FOR_TARGET; test -x $[2] ); then
2170         gcc_cv_as="$AS_FOR_TARGET"
2171 else
2172         AC_PATH_PROG(gcc_cv_as, $AS_FOR_TARGET)
2173 fi])
2174
2175 ORIGINAL_AS_FOR_TARGET=$gcc_cv_as
2176 AC_SUBST(ORIGINAL_AS_FOR_TARGET)
2177 case "$ORIGINAL_AS_FOR_TARGET" in
2178   ./as | ./as$build_exeext) ;;
2179   *) AC_CONFIG_FILES(as:exec-tool.in, [chmod +x as]) ;;
2180 esac
2181
2182 AC_MSG_CHECKING(what assembler to use)
2183 if test "$gcc_cv_as" = ../gas/as-new$build_exeext; then
2184   # Single tree build which includes gas.  We want to prefer it
2185   # over whatever linker top-level may have detected, since
2186   # we'll use what we're building after installation anyway.
2187   AC_MSG_RESULT(newly built gas)
2188   in_tree_gas=yes
2189   _gcc_COMPUTE_GAS_VERSION
2190   in_tree_gas_is_elf=no
2191   if grep 'obj_format = elf' ../gas/Makefile > /dev/null \
2192      || (grep 'obj_format = multi' ../gas/Makefile \
2193          && grep 'extra_objects =.* obj-elf' ../gas/Makefile) > /dev/null
2194   then
2195     in_tree_gas_is_elf=yes
2196   fi
2197 else
2198   AC_MSG_RESULT($gcc_cv_as)
2199   in_tree_gas=no
2200 fi
2201
2202 default_ld=
2203 AC_ARG_ENABLE(ld,
2204 [[  --enable-ld[=ARG]       build ld [ARG={default,yes,no}]]],
2205 [case "${enableval}" in
2206  no)
2207    default_ld=ld.gold
2208    ;;
2209  esac])
2210
2211 install_gold_as_default=no
2212 AC_ARG_ENABLE(gold,
2213 [[  --enable-gold[=ARG]     build gold [ARG={default,yes,no}]]],
2214 [case "${enableval}" in
2215  default)
2216    install_gold_as_default=yes
2217    ;;
2218  yes)
2219    if test x${default_ld} != x; then
2220      install_gold_as_default=yes
2221    fi
2222    ;;
2223  no)
2224    ;;
2225  *)
2226    AC_MSG_ERROR([invalid --enable-gold argument])
2227    ;;
2228  esac])
2229
2230 # Identify the linker which will work hand-in-glove with the newly
2231 # built GCC, so that we can examine its features.  This is the linker
2232 # which will be driven by the driver program.
2233 #
2234 # If build != host, and we aren't building gas in-tree, we identify a
2235 # build->target linker and hope that it will have the same features
2236 # as the host->target linker we'll be using.
2237 gcc_cv_gld_major_version=
2238 gcc_cv_gld_minor_version=
2239 gcc_cv_ld_gld_srcdir=`echo $srcdir | sed -e 's,/gcc$,,'`/ld
2240 gcc_cv_ld_gold_srcdir=`echo $srcdir | sed -e 's,/gcc$,,'`/gold
2241 gcc_cv_ld_bfd_srcdir=`echo $srcdir | sed -e 's,/gcc$,,'`/bfd
2242
2243 AS_VAR_SET_IF(gcc_cv_ld,, [
2244 if test -x "$DEFAULT_LINKER"; then
2245         gcc_cv_ld="$DEFAULT_LINKER"
2246 elif test $install_gold_as_default = yes \
2247      && test -f $gcc_cv_ld_gold_srcdir/configure.ac \
2248      && test -f ../gold/Makefile \
2249      && test x$build = x$host; then
2250         gcc_cv_ld=../gold/ld-new$build_exeext
2251 elif test -f $gcc_cv_ld_gld_srcdir/configure.ac \
2252      && test -f ../ld/Makefile \
2253      && test x$build = x$host; then
2254         gcc_cv_ld=../ld/ld-new$build_exeext
2255 elif test -x collect-ld$build_exeext; then
2256         # Build using linker in the current directory.
2257         gcc_cv_ld=./collect-ld$build_exeext
2258 elif ( set dummy $LD_FOR_TARGET; test -x $[2] ); then
2259         gcc_cv_ld="$LD_FOR_TARGET"
2260 else
2261         AC_PATH_PROG(gcc_cv_ld, $LD_FOR_TARGET)
2262 fi])
2263
2264 ORIGINAL_PLUGIN_LD_FOR_TARGET=$gcc_cv_ld
2265 PLUGIN_LD_SUFFIX=`basename $gcc_cv_ld | sed -e "s,$target_alias-,,"`
2266 # if the PLUGIN_LD is set ld-new, just have it as ld
2267 # as that is the installed named.
2268 if test x$PLUGIN_LD_SUFFIX = xld-new \
2269    || test x$PLUGIN_LD_SUFFIX = xcollect-ld ; then
2270   PLUGIN_LD_SUFFIX=ld
2271 fi
2272 AC_ARG_WITH(plugin-ld,
2273 [AS_HELP_STRING([[--with-plugin-ld=[ARG]]], [specify the plugin linker])],
2274 [if test x"$withval" != x; then
2275    ORIGINAL_PLUGIN_LD_FOR_TARGET="$withval"
2276    PLUGIN_LD_SUFFIX="$withval"
2277  fi])
2278 AC_SUBST(ORIGINAL_PLUGIN_LD_FOR_TARGET)
2279 AC_DEFINE_UNQUOTED(PLUGIN_LD_SUFFIX, "$PLUGIN_LD_SUFFIX", [Specify plugin linker])
2280
2281 # Check to see if we are using gold instead of ld
2282 AC_MSG_CHECKING(whether we are using gold)
2283 ld_is_gold=no
2284 if test x$gcc_cv_ld != x; then
2285   if $gcc_cv_ld --version 2>/dev/null | sed 1q \
2286      | grep "GNU gold" > /dev/null; then
2287     ld_is_gold=yes
2288   fi
2289 fi
2290 AC_MSG_RESULT($ld_is_gold)
2291
2292 AC_MSG_CHECKING(gold linker with split stack support as non default)
2293 # Check to see if default ld is not gold, but gold is
2294 # available and has support for split stack.  If gcc was configured
2295 # with gold then no checking is done.
2296 #
2297 if test x$ld_is_gold = xno && which ${gcc_cv_ld}.gold >/dev/null 2>&1; then
2298
2299 # For platforms other than powerpc64*, enable as appropriate.
2300
2301   gold_non_default=no
2302   ld_gold=`which ${gcc_cv_ld}.gold`
2303 # Make sure this gold has minimal split stack support
2304   if $ld_gold --help 2>/dev/null | grep split-stack-adjust-size >/dev/null 2>&1; then
2305     ld_vers=`$ld_gold --version | sed 1q`
2306     gold_vers=`echo $ld_vers | sed -n \
2307           -e 's,^[[^)]]*[[  ]]\([[0-9]][[0-9]]*\.[[0-9]][[0-9]]*[[^)]]*\)) .*$,\1,p'`
2308     case $target in
2309 # check that the gold version contains the complete split stack support
2310 # on powerpc64 big and little endian
2311       powerpc64*-*-*)
2312         case "$gold_vers" in
2313           2.25.[[1-9]]*|2.2[[6-9]][[.0-9]]*|2.[[3-9]][[.0-9]]*|[[3-9]].[[.0-9]]*) gold_non_default=yes
2314           ;;
2315           *) gold_non_default=no
2316           ;;
2317         esac
2318         ;;
2319     esac
2320   fi
2321   if test $gold_non_default = yes; then
2322     AC_DEFINE(HAVE_GOLD_NON_DEFAULT_SPLIT_STACK, 1,
2323             [Define if the gold linker supports split stack and is available as a non-default])
2324   fi
2325 fi
2326 AC_MSG_RESULT($gold_non_default)
2327
2328 ORIGINAL_LD_FOR_TARGET=$gcc_cv_ld
2329 AC_SUBST(ORIGINAL_LD_FOR_TARGET)
2330 case "$ORIGINAL_LD_FOR_TARGET" in
2331   ./collect-ld | ./collect-ld$build_exeext) ;;
2332   *) AC_CONFIG_FILES(collect-ld:exec-tool.in, [chmod +x collect-ld]) ;;
2333 esac
2334
2335 AC_MSG_CHECKING(what linker to use)
2336 if test "$gcc_cv_ld" = ../ld/ld-new$build_exeext \
2337    || test "$gcc_cv_ld" = ../gold/ld-new$build_exeext; then
2338         # Single tree build which includes ld.  We want to prefer it
2339         # over whatever linker top-level may have detected, since
2340         # we'll use what we're building after installation anyway.
2341         AC_MSG_RESULT(newly built ld)
2342         in_tree_ld=yes
2343         in_tree_ld_is_elf=no
2344         if (grep 'EMUL = .*elf' ../ld/Makefile \
2345             || grep 'EMUL = .*linux' ../ld/Makefile \
2346             || grep 'EMUL = .*lynx' ../ld/Makefile) > /dev/null; then
2347           in_tree_ld_is_elf=yes
2348         elif test "$ld_is_gold" = yes; then
2349           in_tree_ld_is_elf=yes
2350         fi
2351         for f in $gcc_cv_ld_bfd_srcdir/configure $gcc_cv_ld_gld_srcdir/configure $gcc_cv_ld_gld_srcdir/configure.ac $gcc_cv_ld_gld_srcdir/Makefile.in
2352         do
2353 changequote(,)dnl
2354                 gcc_cv_gld_version=`sed -n -e 's/^[     ]*VERSION=[^0-9A-Za-z_]*\([0-9]*\.[0-9]*.*\)/VERSION=\1/p' < $f`
2355                 if test x$gcc_cv_gld_version != x; then
2356                         break
2357                 fi
2358         done
2359         case $gcc_cv_gld_version in
2360           VERSION=[0-9]*) ;;
2361 changequote([,])dnl
2362           *) AC_MSG_ERROR([[cannot find version of in-tree linker]]) ;;
2363 changequote(,)dnl
2364         esac
2365         gcc_cv_gld_major_version=`expr "$gcc_cv_gld_version" : "VERSION=\([0-9]*\)"`
2366         gcc_cv_gld_minor_version=`expr "$gcc_cv_gld_version" : "VERSION=[0-9]*\.\([0-9]*\)"`
2367 changequote([,])dnl
2368         ORIGINAL_LD_BFD_FOR_TARGET=../ld/ld-new$build_exeext
2369         ORIGINAL_LD_GOLD_FOR_TARGET=../gold/ld-new$build_exeext
2370 else
2371         AC_MSG_RESULT($gcc_cv_ld)
2372         in_tree_ld=no
2373         gcc_cvs_ld_program=`dirname $gcc_cv_ld`/`basename $gcc_cv_ld $host_exeext`
2374         ORIGINAL_LD_BFD_FOR_TARGET=${gcc_cvs_ld_program}.bfd$host_exeext
2375         ORIGINAL_LD_GOLD_FOR_TARGET=${gcc_cvs_ld_program}.gold$host_exeext
2376 fi
2377
2378 AC_SUBST(ORIGINAL_LD_BFD_FOR_TARGET)
2379 AC_SUBST(ORIGINAL_LD_GOLD_FOR_TARGET)
2380
2381 # Figure out what nm we will be using.
2382 gcc_cv_binutils_srcdir=`echo $srcdir | sed -e 's,/gcc$,,'`/binutils
2383 AS_VAR_SET_IF(gcc_cv_nm,, [
2384 if test -f $gcc_cv_binutils_srcdir/configure.ac \
2385      && test -f ../binutils/Makefile \
2386      && test x$build = x$host; then
2387         gcc_cv_nm=../binutils/nm-new$build_exeext
2388 elif test -x nm$build_exeext; then
2389         gcc_cv_nm=./nm$build_exeext
2390 elif ( set dummy $NM_FOR_TARGET; test -x $[2] ); then
2391         gcc_cv_nm="$NM_FOR_TARGET"
2392 else
2393         AC_PATH_PROG(gcc_cv_nm, $NM_FOR_TARGET)
2394 fi])
2395
2396 AC_MSG_CHECKING(what nm to use)
2397 if test "$gcc_cv_nm" = ../binutils/nm-new$build_exeext; then
2398         # Single tree build which includes binutils.
2399         AC_MSG_RESULT(newly built nm)
2400         in_tree_nm=yes
2401 else
2402         AC_MSG_RESULT($gcc_cv_nm)
2403         in_tree_nm=no
2404 fi
2405
2406 ORIGINAL_NM_FOR_TARGET=$gcc_cv_nm
2407 AC_SUBST(ORIGINAL_NM_FOR_TARGET)
2408 case "$ORIGINAL_NM_FOR_TARGET" in
2409   ./nm | ./nm$build_exeext) ;;
2410   *) AC_CONFIG_FILES(nm:exec-tool.in, [chmod +x nm]) ;;
2411 esac
2412
2413
2414 # Figure out what objdump we will be using.
2415 AS_VAR_SET_IF(gcc_cv_objdump,, [
2416 if test -f $gcc_cv_binutils_srcdir/configure.ac \
2417      && test -f ../binutils/Makefile \
2418      && test x$build = x$host; then
2419         # Single tree build which includes binutils.
2420         gcc_cv_objdump=../binutils/objdump$build_exeext
2421 elif test -x objdump$build_exeext; then
2422         gcc_cv_objdump=./objdump$build_exeext
2423 elif ( set dummy $OBJDUMP_FOR_TARGET; test -x $[2] ); then
2424         gcc_cv_objdump="$OBJDUMP_FOR_TARGET"
2425 else
2426         AC_PATH_PROG(gcc_cv_objdump, $OBJDUMP_FOR_TARGET)
2427 fi])
2428
2429 AC_MSG_CHECKING(what objdump to use)
2430 if test "$gcc_cv_objdump" = ../binutils/objdump$build_exeext; then
2431         # Single tree build which includes binutils.
2432         AC_MSG_RESULT(newly built objdump)
2433 elif test x$gcc_cv_objdump = x; then
2434         AC_MSG_RESULT(not found)
2435 else
2436         AC_MSG_RESULT($gcc_cv_objdump)
2437 fi
2438
2439 # Figure out what readelf we will be using.
2440 AS_VAR_SET_IF(gcc_cv_readelf,, [
2441 if test -f $gcc_cv_binutils_srcdir/configure.ac \
2442      && test -f ../binutils/Makefile \
2443      && test x$build = x$host; then
2444         # Single tree build which includes binutils.
2445         gcc_cv_readelf=../binutils/readelf$build_exeext
2446 elif test -x readelf$build_exeext; then
2447         gcc_cv_readelf=./readelf$build_exeext
2448 elif ( set dummy $READELF_FOR_TARGET; test -x $[2] ); then
2449         gcc_cv_readelf="$READELF_FOR_TARGET"
2450 else
2451         AC_PATH_PROG(gcc_cv_readelf, $READELF_FOR_TARGET)
2452 fi])
2453
2454 AC_MSG_CHECKING(what readelf to use)
2455 if test "$gcc_cv_readelf" = ../binutils/readelf$build_exeext; then
2456         # Single tree build which includes binutils.
2457         AC_MSG_RESULT(newly built readelf)
2458 elif test x$gcc_cv_readelf = x; then
2459         AC_MSG_RESULT(not found)
2460 else
2461         AC_MSG_RESULT($gcc_cv_readelf)
2462 fi
2463
2464 # Figure out what assembler alignment features are present.
2465 gcc_GAS_CHECK_FEATURE([.balign and .p2align], gcc_cv_as_balign_and_p2align,
2466  [2,6,0],,
2467 [.balign 4
2468 .p2align 2],,
2469 [AC_DEFINE(HAVE_GAS_BALIGN_AND_P2ALIGN, 1,
2470   [Define if your assembler supports .balign and .p2align.])])
2471
2472 gcc_GAS_CHECK_FEATURE([.p2align with maximum skip], gcc_cv_as_max_skip_p2align,
2473  [2,8,0],,
2474  [.p2align 4,,7],,
2475 [AC_DEFINE(HAVE_GAS_MAX_SKIP_P2ALIGN, 1,
2476   [Define if your assembler supports specifying the maximum number
2477    of bytes to skip when using the GAS .p2align command.])])
2478
2479 gcc_GAS_CHECK_FEATURE([.literal16], gcc_cv_as_literal16,
2480  [2,8,0],,
2481  [.literal16],,
2482 [AC_DEFINE(HAVE_GAS_LITERAL16, 1,
2483   [Define if your assembler supports .literal16.])])
2484
2485 gcc_GAS_CHECK_FEATURE([working .subsection -1], gcc_cv_as_subsection_m1,
2486  [elf,2,9,0],,
2487  [conftest_label1: .word 0
2488 .subsection -1
2489 conftest_label2: .word 0
2490 .previous],
2491  [if test x$gcc_cv_nm != x; then
2492     $gcc_cv_nm conftest.o | grep conftest_label1 > conftest.nm1
2493     $gcc_cv_nm conftest.o | grep conftest_label2 | sed -e 's/label2/label1/' > conftest.nm2
2494     if cmp conftest.nm1 conftest.nm2 > /dev/null 2>&1
2495     then :
2496     else gcc_cv_as_subsection_m1=yes
2497     fi
2498     rm -f conftest.nm1 conftest.nm2
2499   fi],
2500  [AC_DEFINE(HAVE_GAS_SUBSECTION_ORDERING, 1,
2501   [Define if your assembler supports .subsection and .subsection -1 starts
2502    emitting at the beginning of your section.])])
2503
2504 gcc_GAS_CHECK_FEATURE([.weak], gcc_cv_as_weak,
2505  [2,2,0],,
2506  [      .weak foobar],,
2507 [AC_DEFINE(HAVE_GAS_WEAK, 1, [Define if your assembler supports .weak.])])
2508
2509 gcc_GAS_CHECK_FEATURE([.weakref], gcc_cv_as_weakref,
2510  [2,17,0],,
2511  [      .weakref foobar, barfnot],,
2512 [AC_DEFINE(HAVE_GAS_WEAKREF, 1, [Define if your assembler supports .weakref.])])
2513
2514 gcc_GAS_CHECK_FEATURE([.nsubspa comdat], gcc_cv_as_nsubspa_comdat,
2515  [2,15,91],,
2516  [      .SPACE $TEXT$
2517         .NSUBSPA $CODE$,COMDAT],,
2518 [AC_DEFINE(HAVE_GAS_NSUBSPA_COMDAT, 1, [Define if your assembler supports .nsubspa comdat option.])])
2519
2520 # .hidden needs to be supported in both the assembler and the linker,
2521 # because GNU LD versions before 2.12.1 have buggy support for STV_HIDDEN.
2522 # This is irritatingly difficult to feature test for; we have to check the
2523 # date string after the version number.  If we've got an in-tree
2524 # ld, we don't know its patchlevel version, so we set the baseline at 2.13
2525 # to be safe.
2526 # The gcc_GAS_CHECK_FEATURE call just sets a cache variable.
2527 case "${target}" in
2528   *-*-aix*)
2529     conftest_s='        .globl foobar,hidden'
2530     ;;
2531   *)
2532     conftest_s='        .hidden foobar
2533 foobar:'
2534     ;;
2535 esac
2536 gcc_GAS_CHECK_FEATURE([.hidden], gcc_cv_as_hidden,
2537  [elf,2,13,0],, [$conftest_s])
2538 case "${target}" in
2539   *-*-darwin*)
2540     # Darwin as has some visibility support, though with a different syntax.
2541     gcc_cv_as_hidden=yes
2542     ;;
2543 esac
2544
2545 # gnu_indirect_function type is an extension proposed at
2546 # http://groups.google/com/group/generic-abi/files. It allows dynamic runtime
2547 # selection of function implementation
2548 AC_ARG_ENABLE(gnu-indirect-function,
2549  [AS_HELP_STRING([--enable-gnu-indirect-function],
2550                  [enable the use of the @gnu_indirect_function to glibc systems])],
2551  [case $enable_gnu_indirect_function in
2552     yes | no) ;;
2553     *) AC_MSG_ERROR(['$enable_gnu_indirect_function' is an invalid value for --enable-gnu-indirect-function.
2554 Valid choices are 'yes' and 'no'.]) ;;
2555   esac],
2556  [enable_gnu_indirect_function="$default_gnu_indirect_function"])
2557
2558 gif=`if test x$enable_gnu_indirect_function = xyes; then echo 1; else echo 0; fi`
2559 AC_DEFINE_UNQUOTED(HAVE_GNU_INDIRECT_FUNCTION, $gif,
2560 [Define if your system supports gnu indirect functions.])
2561
2562
2563 changequote(,)dnl
2564 if test $in_tree_ld != yes ; then
2565   ld_ver=`$gcc_cv_ld --version 2>/dev/null | sed 1q`
2566   if echo "$ld_ver" | grep GNU > /dev/null; then
2567     if test x"$ld_is_gold" = xyes; then
2568       # GNU gold --version looks like this:
2569       #
2570       # GNU gold (GNU Binutils 2.21.51.20110225) 1.11
2571       #
2572       # We extract the binutils version which is more familiar and specific
2573       # than the gold version.
2574       ld_vers=`echo $ld_ver | sed -n \
2575           -e 's,^[^)]*[  ]\([0-9][0-9]*\.[0-9][0-9]*[^)]*\)) .*$,\1,p'`
2576     else
2577       # GNU ld --version looks like this:
2578       #
2579       # GNU ld (GNU Binutils) 2.21.51.20110225
2580       ld_vers=`echo $ld_ver | sed -n \
2581           -e 's,^.*[     ]\([0-9][0-9]*\.[0-9][0-9]*.*\)$,\1,p'`
2582     fi
2583     ld_date=`echo $ld_ver | sed -n 's,^.*\([2-9][0-9][0-9][0-9]\)[-]*\([01][0-9]\)[-]*\([0-3][0-9]\).*$,\1\2\3,p'`
2584     ld_vers_major=`expr "$ld_vers" : '\([0-9]*\)'`
2585     ld_vers_minor=`expr "$ld_vers" : '[0-9]*\.\([0-9]*\)'`
2586     ld_vers_patch=`expr "$ld_vers" : '[0-9]*\.[0-9]*\.\([0-9]*\)'`
2587   else
2588     case "${target}" in
2589       *-*-solaris2*)
2590         # See acinclude.m4 (gcc_SUN_LD_VERSION) for the version number
2591         # format.
2592         #
2593         # Don't reuse gcc_gv_sun_ld_vers_* in case a linker other than
2594         # /usr/ccs/bin/ld has been configured.
2595         ld_ver=`$gcc_cv_ld -V 2>&1`
2596         if echo "$ld_ver" | grep 'Solaris Link Editors' > /dev/null; then
2597           ld_vers=`echo $ld_ver | sed -n \
2598             -e 's,^.*: 5\.[0-9][0-9]*-\([0-9]\.[0-9][0-9]*\).*$,\1,p'`
2599           ld_vers_major=`expr "$ld_vers" : '\([0-9]*\)'`
2600           ld_vers_minor=`expr "$ld_vers" : '[0-9]*\.\([0-9]*\)'`
2601         fi
2602         ;;
2603     esac
2604   fi
2605 fi
2606 changequote([,])dnl
2607
2608 AC_CACHE_CHECK(linker for .hidden support, gcc_cv_ld_hidden,
2609 [[if test $in_tree_ld = yes ; then
2610   gcc_cv_ld_hidden=no
2611   if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 13 -o "$gcc_cv_gld_major_version" -gt 2 \
2612      && test $in_tree_ld_is_elf = yes; then
2613      gcc_cv_ld_hidden=yes
2614   fi
2615 else
2616   gcc_cv_ld_hidden=yes
2617   if test x"$ld_is_gold" = xyes; then
2618     :
2619   elif echo "$ld_ver" | grep GNU > /dev/null; then
2620     case "${target}" in
2621       mmix-knuth-mmixware)
2622         # The linker emits by default mmo, not ELF, so "no" is appropriate.
2623         gcc_cv_ld_hidden=no
2624         ;;
2625     esac
2626     if test 0"$ld_date" -lt 20020404; then
2627       if test -n "$ld_date"; then
2628         # If there was date string, but was earlier than 2002-04-04, fail
2629         gcc_cv_ld_hidden=no
2630       elif test -z "$ld_vers"; then
2631         # If there was no date string nor ld version number, something is wrong
2632         gcc_cv_ld_hidden=no
2633       else
2634         test -z "$ld_vers_patch" && ld_vers_patch=0
2635         if test "$ld_vers_major" -lt 2; then
2636           gcc_cv_ld_hidden=no
2637         elif test "$ld_vers_major" -eq 2 -a "$ld_vers_minor" -lt 12; then
2638           gcc_cv_ld_hidden="no"
2639         elif test "$ld_vers_major" -eq 2 -a "$ld_vers_minor" -eq 12 -a "$ld_vers_patch" -eq 0; then
2640           gcc_cv_ld_hidden=no
2641         fi
2642       fi
2643     fi
2644   else
2645     case "${target}" in
2646       *-*-aix[789]*)
2647         gcc_cv_ld_hidden=yes
2648         ;;
2649       *-*-darwin*)
2650         # Darwin ld has some visibility support.
2651         gcc_cv_ld_hidden=yes
2652         ;;
2653       hppa64*-*-hpux* | ia64*-*-hpux*)
2654         gcc_cv_ld_hidden=yes
2655         ;;
2656       *-*-solaris2.1[0-9]*)
2657         # Support for .hidden in Sun ld appeared in Solaris 9 FCS, but
2658         # .symbolic was only added in Solaris 9 12/02.
2659         gcc_cv_ld_hidden=yes
2660         ;;
2661       *)
2662         gcc_cv_ld_hidden=no
2663         ;;
2664     esac
2665   fi
2666 fi]])
2667 libgcc_visibility=no
2668 AC_SUBST(libgcc_visibility)
2669 GCC_TARGET_TEMPLATE([HAVE_GAS_HIDDEN])
2670 if test $gcc_cv_as_hidden = yes && test $gcc_cv_ld_hidden = yes; then
2671   libgcc_visibility=yes
2672   AC_DEFINE(HAVE_GAS_HIDDEN, 1,
2673   [Define if your assembler and linker support .hidden.])
2674 fi
2675
2676 AC_MSG_CHECKING(linker read-only and read-write section mixing)
2677 gcc_cv_ld_ro_rw_mix=unknown
2678 if test $in_tree_ld = yes ; then
2679   if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 10 -o "$gcc_cv_gld_major_version" -gt 2 \
2680      && test $in_tree_ld_is_elf = yes; then
2681     gcc_cv_ld_ro_rw_mix=read-write
2682   fi
2683 elif test x$gcc_cv_as != x -a x$gcc_cv_ld != x -a x$gcc_cv_objdump != x ; then
2684   echo '.section myfoosect, "a"' > conftest1.s
2685   echo '.section myfoosect, "aw"' > conftest2.s
2686   echo '.byte 1' >> conftest2.s
2687   echo '.section myfoosect, "a"' > conftest3.s
2688   echo '.byte 0' >> conftest3.s
2689   if $gcc_cv_as -o conftest1.o conftest1.s > /dev/null 2>&1 \
2690      && $gcc_cv_as -o conftest2.o conftest2.s > /dev/null 2>&1 \
2691      && $gcc_cv_as -o conftest3.o conftest3.s > /dev/null 2>&1 \
2692      && $gcc_cv_ld -shared -o conftest1.so conftest1.o \
2693         conftest2.o conftest3.o > /dev/null 2>&1; then
2694     gcc_cv_ld_ro_rw_mix=`$gcc_cv_objdump -h conftest1.so \
2695                          | sed -e '/myfoosect/!d' -e N`
2696     if echo "$gcc_cv_ld_ro_rw_mix" | grep CONTENTS > /dev/null; then
2697       if echo "$gcc_cv_ld_ro_rw_mix" | grep READONLY > /dev/null; then
2698         gcc_cv_ld_ro_rw_mix=read-only
2699       else
2700         gcc_cv_ld_ro_rw_mix=read-write
2701       fi
2702     fi
2703   fi
2704 changequote(,)dnl
2705   rm -f conftest.* conftest[123].*
2706 changequote([,])dnl
2707 fi
2708 if test x$gcc_cv_ld_ro_rw_mix = xread-write; then
2709         AC_DEFINE(HAVE_LD_RO_RW_SECTION_MIXING, 1,
2710   [Define if your linker links a mix of read-only
2711    and read-write sections into a read-write section.])
2712 fi
2713 AC_MSG_RESULT($gcc_cv_ld_ro_rw_mix)
2714
2715 gcc_AC_INITFINI_ARRAY
2716
2717 # Check if we have .[us]leb128, and support symbol arithmetic with it.
2718 gcc_GAS_CHECK_FEATURE([.sleb128 and .uleb128], gcc_cv_as_leb128,
2719   [elf,2,11,0],,
2720 [       .data
2721         .uleb128 L2 - L1
2722 L1:
2723         .uleb128 1280
2724         .sleb128 -1010
2725 L2:],
2726 [[# GAS versions before 2.11 do not support uleb128,
2727   # despite appearing to.
2728   # ??? There exists an elf-specific test that will crash
2729   # the assembler.  Perhaps it's better to figure out whether
2730   # arbitrary sections are supported and try the test.
2731   as_ver=`$gcc_cv_as --version 2>/dev/null | sed 1q`
2732   if echo "$as_ver" | grep GNU > /dev/null; then
2733     as_vers=`echo $as_ver | sed -n \
2734         -e 's,^.*[       ]\([0-9][0-9]*\.[0-9][0-9]*.*\)$,\1,p'`
2735     as_major=`expr "$as_vers" : '\([0-9]*\)'`
2736     as_minor=`expr "$as_vers" : '[0-9]*\.\([0-9]*\)'`
2737     if test $as_major -eq 2 && test $as_minor -lt 11
2738     then :
2739     else gcc_cv_as_leb128=yes
2740     fi
2741   fi]],
2742   [AC_DEFINE(HAVE_AS_LEB128, 1,
2743     [Define if your assembler supports .sleb128 and .uleb128.])],
2744   [AC_DEFINE(HAVE_AS_LEB128, 0,
2745     [Define if your assembler supports .sleb128 and .uleb128.])])
2746
2747 # Check if we have assembler support for unwind directives.
2748 gcc_GAS_CHECK_FEATURE([cfi directives], gcc_cv_as_cfi_directive,
2749   ,,
2750 [       .text
2751         .cfi_startproc
2752         .cfi_offset 0, 0
2753         .cfi_same_value 1
2754         .cfi_def_cfa 1, 2
2755         .cfi_escape 1, 2, 3, 4, 5
2756         .cfi_endproc],
2757 [case "$target" in
2758   *-*-solaris*)
2759     # If the linker used on Solaris (like Sun ld) isn't capable of merging
2760     # read-only and read-write sections, we need to make sure that the
2761     # assembler used emits read-write .eh_frame sections.
2762     if test "x$gcc_cv_ld_ro_rw_mix" != xread-write; then
2763       if test "x$gcc_cv_objdump" != x; then
2764         if $gcc_cv_objdump -h conftest.o 2>/dev/null | \
2765                 sed -e /.eh_frame/!d -e N | grep READONLY > /dev/null; then
2766           gcc_cv_as_cfi_directive=no
2767         else
2768           case "$target" in
2769             i?86-*-solaris2.1[[0-9]]* | x86_64-*-solaris2.1[[0-9]]*)
2770               # On Solaris/x86, make sure that GCC and assembler agree on using
2771               # read-only .eh_frame sections for 64-bit.
2772               if test x$gas = xyes; then
2773                  as_ix86_64_opt="--64"
2774               else
2775                  as_ix86_64_opt="-xarch=amd64"
2776               fi
2777               if $gcc_cv_as $as_ix86_64_opt -o conftest.o conftest.s > /dev/null 2>&1 && \
2778                 $gcc_cv_objdump -h conftest.o 2>/dev/null | \
2779                         sed -e /.eh_frame/!d -e N | \
2780                         grep READONLY > /dev/null; then
2781                 gcc_cv_as_cfi_directive=yes
2782               else
2783                 gcc_cv_as_cfi_directive=no
2784               fi
2785               ;;
2786             *)
2787               gcc_cv_as_cfi_directive=yes
2788               ;;
2789           esac
2790         fi
2791       else
2792         # no objdump, err on the side of caution
2793         gcc_cv_as_cfi_directive=no
2794       fi
2795     else
2796       gcc_cv_as_cfi_directive=yes
2797     fi
2798     ;;
2799   *-*-*)
2800     gcc_cv_as_cfi_directive=yes
2801     ;;
2802 esac])
2803 if test $gcc_cv_as_cfi_directive = yes && test x$gcc_cv_objdump != x; then
2804 gcc_GAS_CHECK_FEATURE([working cfi advance], gcc_cv_as_cfi_advance_working,
2805   ,,
2806 [       .text
2807         .cfi_startproc
2808         .cfi_adjust_cfa_offset 64
2809         .skip 75040, 0
2810         .cfi_adjust_cfa_offset 128
2811         .cfi_endproc],
2812 [[
2813 if $gcc_cv_objdump -Wf conftest.o 2>/dev/null \
2814     | grep 'DW_CFA_advance_loc[24]:[    ][      ]*75040[        ]' >/dev/null; then
2815    gcc_cv_as_cfi_advance_working=yes
2816 fi
2817 ]])
2818 else
2819   # no objdump, err on the side of caution
2820   gcc_cv_as_cfi_advance_working=no
2821 fi
2822 GCC_TARGET_TEMPLATE(HAVE_GAS_CFI_DIRECTIVE)
2823 AC_DEFINE_UNQUOTED(HAVE_GAS_CFI_DIRECTIVE,
2824   [`if test $gcc_cv_as_cfi_directive = yes \
2825        && test $gcc_cv_as_cfi_advance_working = yes; then echo 1; else echo 0; fi`],
2826   [Define 0/1 if your assembler supports CFI directives.])
2827
2828 GCC_TARGET_TEMPLATE(HAVE_GAS_CFI_PERSONALITY_DIRECTIVE)
2829 gcc_GAS_CHECK_FEATURE([cfi personality directive],
2830   gcc_cv_as_cfi_personality_directive, ,,
2831 [       .text
2832         .cfi_startproc
2833         .cfi_personality 0, symbol
2834         .cfi_endproc])
2835 AC_DEFINE_UNQUOTED(HAVE_GAS_CFI_PERSONALITY_DIRECTIVE,
2836   [`if test $gcc_cv_as_cfi_personality_directive = yes;
2837     then echo 1; else echo 0; fi`],
2838   [Define 0/1 if your assembler supports .cfi_personality.])
2839
2840 gcc_GAS_CHECK_FEATURE([cfi sections directive],
2841   gcc_cv_as_cfi_sections_directive, ,,
2842 [       .text
2843         .cfi_sections .debug_frame, .eh_frame
2844         .cfi_startproc
2845         .cfi_endproc],
2846 [case $target_os in
2847   win32 | pe | cygwin* | mingw32*)
2848     # Need to check that we generated the correct relocation for the
2849     # .debug_frame section.  This was fixed for binutils 2.21.
2850     gcc_cv_as_cfi_sections_directive=no
2851     if test "x$gcc_cv_objdump" != x; then
2852      if $gcc_cv_objdump -j .debug_frame -r conftest.o 2>/dev/null | \
2853         grep secrel > /dev/null; then
2854       gcc_cv_as_cfi_sections_directive=yes
2855      fi
2856     fi
2857     ;;
2858   *)
2859     gcc_cv_as_cfi_sections_directive=yes
2860     ;;
2861 esac])
2862 GCC_TARGET_TEMPLATE(HAVE_GAS_CFI_SECTIONS_DIRECTIVE)
2863 AC_DEFINE_UNQUOTED(HAVE_GAS_CFI_SECTIONS_DIRECTIVE,
2864   [`if test $gcc_cv_as_cfi_sections_directive = yes;
2865     then echo 1; else echo 0; fi`],
2866   [Define 0/1 if your assembler supports .cfi_sections.])
2867
2868 # GAS versions up to and including 2.11.0 may mis-optimize
2869 # .eh_frame data.
2870 gcc_GAS_CHECK_FEATURE(eh_frame optimization, gcc_cv_as_eh_frame,
2871   [elf,2,12,0],,
2872 [       .text
2873 .LFB1:
2874         .4byte  0
2875 .L1:
2876         .4byte  0
2877 .LFE1:
2878         .section        .eh_frame,"aw",@progbits
2879 __FRAME_BEGIN__:
2880         .4byte  .LECIE1-.LSCIE1
2881 .LSCIE1:
2882         .4byte  0x0
2883         .byte   0x1
2884         .ascii "z\0"
2885         .byte   0x1
2886         .byte   0x78
2887         .byte   0x1a
2888         .byte   0x0
2889         .byte   0x4
2890         .4byte  1
2891         .p2align 1
2892 .LECIE1:
2893 .LSFDE1:
2894         .4byte  .LEFDE1-.LASFDE1
2895 .LASFDE1:
2896         .4byte  .LASFDE1-__FRAME_BEGIN__
2897         .4byte  .LFB1
2898         .4byte  .LFE1-.LFB1
2899         .byte   0x4
2900         .4byte  .LFE1-.LFB1
2901         .byte   0x4
2902         .4byte  .L1-.LFB1
2903 .LEFDE1:],
2904 [  dnl # For autoconf 2.5x, must protect trailing spaces with @&t@.
2905 cat > conftest.lit <<EOF
2906  0000 10000000 00000000 017a0001 781a0004  .........z..x...
2907  0010 01000000 12000000 18000000 00000000  ................
2908  0020 08000000 04080000 0044               .........D      @&t@
2909 EOF
2910 cat > conftest.big <<EOF
2911  0000 00000010 00000000 017a0001 781a0004  .........z..x...
2912  0010 00000001 00000012 00000018 00000000  ................
2913  0020 00000008 04000000 0844               .........D      @&t@
2914 EOF
2915   # If the assembler didn't choke, and we can objdump,
2916   # and we got the correct data, then succeed.
2917   # The text in the here-document typically retains its unix-style line
2918   # endings, while the output of objdump will use host line endings.
2919   # Therefore, use diff -b for the comparisons.
2920   if test x$gcc_cv_objdump != x \
2921   && $gcc_cv_objdump -s -j .eh_frame conftest.o 2>/dev/null \
2922      | tail -3 > conftest.got \
2923   && { diff -b conftest.lit conftest.got > /dev/null 2>&1 \
2924     || diff -b conftest.big conftest.got > /dev/null 2>&1; }
2925   then
2926     gcc_cv_as_eh_frame=yes
2927   elif AC_TRY_COMMAND($gcc_cv_as -o conftest.o --traditional-format /dev/null); then
2928     gcc_cv_as_eh_frame=buggy
2929   else
2930     # Uh oh, what do we do now?
2931     gcc_cv_as_eh_frame=no
2932   fi])
2933
2934 if test $gcc_cv_as_eh_frame = buggy; then
2935   AC_DEFINE(USE_AS_TRADITIONAL_FORMAT, 1,
2936   [Define if your assembler mis-optimizes .eh_frame data.])
2937 fi
2938
2939 gcc_GAS_CHECK_FEATURE(section merging support, gcc_cv_as_shf_merge,
2940  [elf,2,12,0], [--fatal-warnings],
2941  [.section .rodata.str, "aMS", @progbits, 1])
2942 if test $gcc_cv_as_shf_merge = no; then
2943   gcc_GAS_CHECK_FEATURE(section merging support, gcc_cv_as_shf_merge,
2944     [elf,2,12,0], [--fatal-warnings],
2945     [.section .rodata.str, "aMS", %progbits, 1])
2946 fi
2947 AC_DEFINE_UNQUOTED(HAVE_GAS_SHF_MERGE,
2948   [`if test $gcc_cv_as_shf_merge = yes; then echo 1; else echo 0; fi`],
2949 [Define 0/1 if your assembler supports marking sections with SHF_MERGE flag.])
2950
2951 gcc_GAS_CHECK_FEATURE([stabs directive], gcc_cv_as_stabs_directive, ,,
2952 [.stabs "gcc2_compiled.",60,0,0,0],,
2953 [AC_DEFINE(HAVE_AS_STABS_DIRECTIVE, 1,
2954   [Define if your assembler supports .stabs.])])
2955
2956 gcc_GAS_CHECK_FEATURE([COMDAT group support (GNU as)],
2957  gcc_cv_as_comdat_group,
2958  [elf,2,16,0], [--fatal-warnings],
2959  [.section .text,"axG",@progbits,.foo,comdat])
2960 if test $gcc_cv_as_comdat_group = yes; then
2961   gcc_cv_as_comdat_group_percent=no
2962   gcc_cv_as_comdat_group_group=no
2963 else
2964  gcc_GAS_CHECK_FEATURE([COMDAT group support (GNU as, %type)],
2965    gcc_cv_as_comdat_group_percent,
2966    [elf,2,16,0], [--fatal-warnings],
2967    [.section .text,"axG",%progbits,.foo,comdat])
2968  if test $gcc_cv_as_comdat_group_percent = yes; then
2969    gcc_cv_as_comdat_group_group=no
2970  else
2971    case "${target}" in
2972      # Sun as uses a completely different syntax.
2973      *-*-solaris2*)
2974        case "${target}" in
2975          sparc*-*-solaris2*)
2976            conftest_s='
2977                .group foo,".text%foo",#comdat
2978                .section ".text%foo", #alloc,#execinstr,#progbits
2979                .globl foo
2980              foo:
2981              '
2982            ;;
2983          i?86-*-solaris2* | x86_64-*-solaris2.1[[0-9]]*)
2984            conftest_s='
2985                .group foo,.text%foo,#comdat
2986                .section .text%foo, "ax", @progbits
2987                .globl  foo
2988              foo:
2989              '
2990            ;;
2991        esac
2992        gcc_GAS_CHECK_FEATURE([COMDAT group support (Sun as, .group)],
2993          gcc_cv_as_comdat_group_group,
2994          ,, [$conftest_s])
2995        ;;
2996    esac
2997    if test -z "${gcc_cv_as_comdat_group_group+set}"; then
2998      gcc_cv_as_comdat_group_group=no
2999    fi
3000  fi
3001 fi
3002 if test x"$ld_is_gold" = xyes; then
3003   comdat_group=yes
3004 elif test $in_tree_ld = yes ; then
3005   comdat_group=no
3006   if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 16 -o "$gcc_cv_gld_major_version" -gt 2 \
3007      && test $in_tree_ld_is_elf = yes; then
3008      comdat_group=yes
3009   fi
3010 elif echo "$ld_ver" | grep GNU > /dev/null; then
3011   comdat_group=yes
3012   if test 0"$ld_date" -lt 20050308; then
3013     if test -n "$ld_date"; then
3014       # If there was date string, but was earlier than 2005-03-08, fail
3015       comdat_group=no
3016     elif test "$ld_vers_major" -lt 2; then
3017       comdat_group=no
3018     elif test "$ld_vers_major" -eq 2 -a "$ld_vers_minor" -lt 16; then
3019       comdat_group=no
3020     fi
3021   fi
3022 else
3023 changequote(,)dnl
3024   case "${target}" in
3025     *-*-solaris2.1[1-9]*)
3026       comdat_group=no
3027       # Sun ld has COMDAT group support since Solaris 9, but it doesn't
3028       # interoperate with GNU as until Solaris 11 build 130, i.e. ld
3029       # version 1.688.
3030       #
3031       # If using Sun as for COMDAT group as emitted by GCC, one needs at
3032       # least ld version 1.2267.
3033       if test "$ld_vers_major" -gt 1; then
3034         comdat_group=yes
3035       elif test "x$gas_flag" = xyes && test "$ld_vers_minor" -ge 1688; then
3036         comdat_group=yes
3037       elif test "$ld_vers_minor" -ge 2267; then
3038         comdat_group=yes
3039       fi
3040       ;;
3041     *)
3042       # Assume linkers other than GNU ld don't support COMDAT group.
3043       comdat_group=no
3044       ;;
3045   esac
3046 changequote([,])dnl
3047 fi
3048 # Allow overriding the automatic COMDAT group tests above.
3049 AC_ARG_ENABLE(comdat,
3050   [AS_HELP_STRING([--enable-comdat], [enable COMDAT group support])],
3051   [comdat_group="$enable_comdat"])
3052 if test $comdat_group = no; then
3053   gcc_cv_as_comdat_group=no
3054   gcc_cv_as_comdat_group_percent=no
3055   gcc_cv_as_comdat_group_group=no
3056 fi
3057 AC_DEFINE_UNQUOTED(HAVE_COMDAT_GROUP,
3058   [`if test $gcc_cv_as_comdat_group = yes \
3059     || test $gcc_cv_as_comdat_group_percent = yes \
3060     || test $gcc_cv_as_comdat_group_group = yes; then echo 1; else echo 0; fi`],
3061 [Define 0/1 if your assembler and linker support COMDAT groups.])
3062
3063 gcc_GAS_CHECK_FEATURE([line table discriminator support],
3064  gcc_cv_as_discriminator,
3065  [2,19,51],,
3066 [       .text
3067         .file 1 "conf.c"
3068         .loc 1 1 0 discriminator 1],,
3069 [AC_DEFINE(HAVE_GAS_DISCRIMINATOR, 1,
3070   [Define if your assembler supports the .loc discriminator sub-directive.])])
3071
3072 # Thread-local storage - the check is heavily parameterized.
3073 conftest_s=
3074 tls_first_major=
3075 tls_first_minor=
3076 tls_as_opt=
3077 case "$target" in
3078 changequote(,)dnl
3079   alpha*-*-*)
3080     conftest_s='
3081         .section ".tdata","awT",@progbits
3082 foo:    .long   25
3083         .text
3084         ldq     $27,__tls_get_addr($29)         !literal!1
3085         lda     $16,foo($29)                    !tlsgd!1
3086         jsr     $26,($27),__tls_get_addr        !lituse_tlsgd!1
3087         ldq     $27,__tls_get_addr($29)         !literal!2
3088         lda     $16,foo($29)                    !tlsldm!2
3089         jsr     $26,($27),__tls_get_addr        !lituse_tlsldm!2
3090         ldq     $1,foo($29)                     !gotdtprel
3091         ldah    $2,foo($29)                     !dtprelhi
3092         lda     $3,foo($2)                      !dtprello
3093         lda     $4,foo($29)                     !dtprel
3094         ldq     $1,foo($29)                     !gottprel
3095         ldah    $2,foo($29)                     !tprelhi
3096         lda     $3,foo($2)                      !tprello
3097         lda     $4,foo($29)                     !tprel'
3098         tls_first_major=2
3099         tls_first_minor=13
3100         tls_as_opt=--fatal-warnings
3101         ;;
3102   arc*-*-*)
3103     conftest_s='
3104         add_s r0,r0, @foo@tpoff'
3105         tls_first_major=2
3106         tls_first_minor=23
3107         ;;
3108   cris-*-*|crisv32-*-*)
3109     conftest_s='
3110         .section ".tdata","awT",@progbits
3111 x:      .long   25
3112         .text
3113         move.d x:IE,$r10
3114         nop'
3115         tls_first_major=2
3116         tls_first_minor=20
3117         tls_as_opt=--fatal-warnings
3118         ;;
3119   frv*-*-*)
3120     conftest_s='
3121         .section ".tdata","awT",@progbits
3122 x:      .long   25
3123         .text
3124         call    #gettlsoff(x)'
3125         tls_first_major=2
3126         tls_first_minor=14
3127         ;;
3128   hppa*-*-linux*)
3129     conftest_s='
3130 t1:     .reg    %r20
3131 t2:     .reg    %r21
3132 gp:     .reg    %r19
3133         .section ".tdata","awT",@progbits
3134 foo:    .long   25
3135         .text
3136         .align  4
3137         addil LT%foo-$tls_gdidx$,gp
3138         ldo RT%foo-$tls_gdidx$(%r1),%arg0
3139         b __tls_get_addr
3140         nop
3141         addil LT%foo-$tls_ldidx$,gp
3142         b __tls_get_addr
3143         ldo RT%foo-$tls_ldidx$(%r1),%arg0
3144         addil LR%foo-$tls_dtpoff$,%ret0
3145         ldo RR%foo-$tls_dtpoff$(%r1),%t1
3146         mfctl %cr27,%t1
3147         addil LT%foo-$tls_ieoff$,gp
3148         ldw RT%foo-$tls_ieoff$(%r1),%t2
3149         add %t1,%t2,%t3
3150         mfctl %cr27,%t1
3151         addil LR%foo-$tls_leoff$,%t1
3152         ldo RR%foo-$tls_leoff$(%r1),%t2'
3153         tls_first_major=2
3154         tls_first_minor=15
3155         tls_as_opt=--fatal-warnings
3156         ;;
3157   arm*-*-*)
3158     conftest_s='
3159         .section ".tdata","awT",%progbits
3160 foo:    .long   25
3161         .text
3162 .word foo(gottpoff)
3163 .word foo(tpoff)
3164 .word foo(tlsgd)
3165 .word foo(tlsldm)
3166 .word foo(tlsldo)'
3167         tls_first_major=2
3168         tls_first_minor=17
3169         ;;
3170   i[34567]86-*-* | x86_64-*-*)
3171     case "$target" in
3172       i[34567]86-*-solaris2.* | x86_64-*-solaris2.1[0-9]*)
3173         on_solaris=yes
3174         ;;
3175       *)
3176         on_solaris=no
3177         ;;
3178     esac
3179     if test x$on_solaris = xyes && test x$gas_flag = xno; then
3180       conftest_s='
3181         .section .tdata,"awt",@progbits'
3182       tls_first_major=0
3183       tls_first_minor=0
3184       tls_section_flag=t
3185 changequote([,])dnl
3186       AC_DEFINE(TLS_SECTION_ASM_FLAG, 't',
3187 [Define to the flag used to mark TLS sections if the default (`T') doesn't work.])
3188 changequote(,)dnl
3189     else
3190       conftest_s='
3191         .section ".tdata","awT",@progbits'
3192       tls_first_major=2
3193       tls_first_minor=14
3194       tls_section_flag=T
3195       tls_as_opt="--fatal-warnings"
3196     fi
3197     case "$target" in
3198       i[34567]86-*-*)
3199         conftest_s="$conftest_s
3200 foo:    .long   25
3201         .text
3202         movl    %gs:0, %eax
3203         leal    foo@tlsgd(,%ebx,1), %eax
3204         leal    foo@tlsldm(%ebx), %eax
3205         leal    foo@dtpoff(%eax), %edx
3206         movl    foo@gottpoff(%ebx), %eax
3207         subl    foo@gottpoff(%ebx), %eax
3208         addl    foo@gotntpoff(%ebx), %eax
3209         movl    foo@indntpoff, %eax
3210         movl    \$foo@tpoff, %eax
3211         subl    \$foo@tpoff, %eax
3212         leal    foo@ntpoff(%ecx), %eax"
3213         ;;
3214       x86_64-*-*)
3215         if test x$on_solaris = xyes; then
3216           case $gas_flag in
3217             yes) tls_as_opt="$tls_as_opt --64" ;;
3218             no)  tls_as_opt="$tls_as_opt -xarch=amd64" ;;
3219           esac
3220         fi
3221         conftest_s="$conftest_s
3222 foo:    .long   25
3223         .text
3224         movq    %fs:0, %rax
3225         leaq    foo@tlsgd(%rip), %rdi
3226         leaq    foo@tlsld(%rip), %rdi
3227         leaq    foo@dtpoff(%rax), %rdx
3228         movq    foo@gottpoff(%rip), %rax
3229         movq    \$foo@tpoff, %rax"
3230         ;;
3231     esac
3232     ;;
3233   ia64-*-*)
3234     conftest_s='
3235         .section ".tdata","awT",@progbits
3236 foo:    data8   25
3237         .text
3238         addl    r16 = @ltoff(@dtpmod(foo#)), gp
3239         addl    r17 = @ltoff(@dtprel(foo#)), gp
3240         addl    r18 = @ltoff(@tprel(foo#)), gp
3241         addl    r19 = @dtprel(foo#), gp
3242         adds    r21 = @dtprel(foo#), r13
3243         movl    r23 = @dtprel(foo#)
3244         addl    r20 = @tprel(foo#), gp
3245         adds    r22 = @tprel(foo#), r13
3246         movl    r24 = @tprel(foo#)'
3247         tls_first_major=2
3248         tls_first_minor=13
3249         tls_as_opt=--fatal-warnings
3250         ;;
3251   microblaze*-*-*)
3252     conftest_s='
3253         .section .tdata,"awT",@progbits
3254 x:
3255         .word 2
3256         .text
3257         addik r5,r20,x@TLSGD
3258         addik r5,r20,x@TLSLDM'
3259         tls_first_major=2
3260         tls_first_minor=20
3261         tls_as_opt='--fatal-warnings'
3262         ;;
3263   mips*-*-*)
3264     conftest_s='
3265         .section .tdata,"awT",@progbits
3266 x:
3267         .word 2
3268         .text
3269         addiu $4, $28, %tlsgd(x)
3270         addiu $4, $28, %tlsldm(x)
3271         lui $4, %dtprel_hi(x)
3272         addiu $4, $4, %dtprel_lo(x)
3273         lw $4, %gottprel(x)($28)
3274         lui $4, %tprel_hi(x)
3275         addiu $4, $4, %tprel_lo(x)'
3276         tls_first_major=2
3277         tls_first_minor=16
3278         tls_as_opt='-32 --fatal-warnings'
3279         ;;
3280   m68k-*-*)
3281     conftest_s='
3282         .section .tdata,"awT",@progbits
3283 x:
3284         .word 2
3285         .text
3286 foo:
3287         move.l x@TLSGD(%a5),%a0
3288         move.l x@TLSLDM(%a5),%a0
3289         move.l x@TLSLDO(%a5),%a0
3290         move.l x@TLSIE(%a5),%a0
3291         move.l x@TLSLE(%a5),%a0'
3292         tls_first_major=2
3293         tls_first_minor=19
3294         tls_as_opt='--fatal-warnings'
3295         ;;
3296   nios2-*-*)
3297       conftest_s='
3298         .section ".tdata","awT",@progbits'
3299         tls_first_major=2
3300         tls_first_minor=23
3301         tls_as_opt="--fatal-warnings"
3302         ;;
3303   aarch64*-*-*)
3304     conftest_s='
3305         .section ".tdata","awT",%progbits
3306 foo:    .long   25
3307         .text
3308         adrp  x0, :tlsgd:x
3309         add   x0, x0, #:tlsgd_lo12:x
3310         bl    __tls_get_addr
3311         nop'
3312         tls_first_major=2
3313         tls_first_minor=20
3314         tls_as_opt='--fatal-warnings'
3315         ;;
3316   powerpc-ibm-aix*)
3317     conftest_s='
3318         .extern __get_tpointer
3319         .toc
3320 LC..1:
3321         .tc a[TC],a[TL]@le
3322         .csect .text[PR]
3323 .tlstest:
3324         lwz 9,LC..1(2)
3325         bla __get_tpointer
3326         lwzx 3,9,3
3327         .globl a
3328         .csect a[TL],4
3329 a:
3330         .space 4'
3331         tls_first_major=0
3332         tls_first_minor=0
3333         ;;
3334   powerpc64*-*-*)
3335     conftest_s='
3336         .section ".tdata","awT",@progbits
3337         .align 3
3338 ld0:    .space 8
3339 ld1:    .space 8
3340 x1:     .space 8
3341 x2:     .space 8
3342 x3:     .space 8
3343         .text
3344         addi 3,2,ld0@got@tlsgd
3345         bl .__tls_get_addr
3346         nop
3347         addi 3,2,ld1@toc
3348         bl .__tls_get_addr
3349         nop
3350         addi 3,2,x1@got@tlsld
3351         bl .__tls_get_addr
3352         nop
3353         addi 9,3,x1@dtprel
3354         bl .__tls_get_addr
3355         nop
3356         addis 9,3,x2@dtprel@ha
3357         addi 9,9,x2@dtprel@l
3358         bl .__tls_get_addr
3359         nop
3360         ld 9,x3@got@dtprel(2)
3361         add 9,9,3
3362         bl .__tls_get_addr
3363         nop'
3364         tls_first_major=2
3365         tls_first_minor=14
3366         tls_as_opt="-a64 --fatal-warnings"
3367         ;;
3368   powerpc*-*-*)
3369     conftest_s='
3370         .section ".tdata","awT",@progbits
3371         .align 2
3372 ld0:    .space 4
3373 ld1:    .space 4
3374 x1:     .space 4
3375 x2:     .space 4
3376 x3:     .space 4
3377         .text
3378         addi 3,31,ld0@got@tlsgd
3379         bl __tls_get_addr
3380         addi 3,31,x1@got@tlsld
3381         bl __tls_get_addr
3382         addi 9,3,x1@dtprel
3383         addis 9,3,x2@dtprel@ha
3384         addi 9,9,x2@dtprel@l
3385         lwz 9,x3@got@tprel(31)
3386         add 9,9,x@tls
3387         addi 9,2,x1@tprel
3388         addis 9,2,x2@tprel@ha
3389         addi 9,9,x2@tprel@l'
3390         tls_first_major=2
3391         tls_first_minor=14
3392         tls_as_opt="-a32 --fatal-warnings"
3393         ;;
3394   riscv*-*-*)
3395     conftest_s='
3396         .section .tdata,"awT",@progbits
3397 x:      .word 2
3398         .text
3399         la.tls.gd a0,x
3400         call __tls_get_addr'
3401         tls_first_major=2
3402         tls_first_minor=21
3403         tls_as_opt='--fatal-warnings'
3404         ;;
3405   s390-*-*)
3406     conftest_s='
3407         .section ".tdata","awT",@progbits
3408 foo:    .long   25
3409         .text
3410         .long   foo@TLSGD
3411         .long   foo@TLSLDM
3412         .long   foo@DTPOFF
3413         .long   foo@NTPOFF
3414         .long   foo@GOTNTPOFF
3415         .long   foo@INDNTPOFF
3416         l       %r1,foo@GOTNTPOFF(%r12)
3417         l       %r1,0(%r1):tls_load:foo
3418         bas     %r14,0(%r1,%r13):tls_gdcall:foo
3419         bas     %r14,0(%r1,%r13):tls_ldcall:foo'
3420         tls_first_major=2
3421         tls_first_minor=14
3422         tls_as_opt="-m31 --fatal-warnings"
3423         ;;
3424   s390x-*-*)
3425     conftest_s='
3426         .section ".tdata","awT",@progbits
3427 foo:    .long   25
3428         .text
3429         .quad   foo@TLSGD
3430         .quad   foo@TLSLDM
3431         .quad   foo@DTPOFF
3432         .quad   foo@NTPOFF
3433         .quad   foo@GOTNTPOFF
3434         lg      %r1,foo@GOTNTPOFF(%r12)
3435         larl    %r1,foo@INDNTPOFF
3436         brasl   %r14,__tls_get_offset@PLT:tls_gdcall:foo
3437         brasl   %r14,__tls_get_offset@PLT:tls_ldcall:foo'
3438         tls_first_major=2
3439         tls_first_minor=14
3440         tls_as_opt="-m64 -Aesame --fatal-warnings"
3441         ;;
3442   sh-*-* | sh[123456789lbe]*-*-*)
3443     conftest_s='
3444         .section ".tdata","awT",@progbits
3445 foo:    .long   25
3446         .text
3447         .long   foo@TLSGD
3448         .long   foo@TLSLDM
3449         .long   foo@DTPOFF
3450         .long   foo@GOTTPOFF
3451         .long   foo@TPOFF'
3452         tls_first_major=2
3453         tls_first_minor=13
3454         tls_as_opt=--fatal-warnings
3455         ;;
3456   sparc*-*-*)
3457     case "$target" in
3458       sparc*-sun-solaris2.*)
3459         on_solaris=yes
3460         ;;
3461       *)
3462         on_solaris=no
3463         ;;
3464     esac
3465     if test x$on_solaris = xyes && test x$gas_flag = xno; then
3466       conftest_s='
3467         .section ".tdata",#alloc,#write,#tls'
3468         tls_first_major=0
3469         tls_first_minor=0
3470     else
3471       conftest_s='
3472         .section ".tdata","awT",@progbits'
3473         tls_first_major=2
3474         tls_first_minor=14
3475         tls_as_opt="-32 --fatal-warnings"
3476     fi
3477     conftest_s="$conftest_s
3478 foo:    .long   25
3479         .text
3480         sethi   %tgd_hi22(foo), %o0
3481         add     %o0, %tgd_lo10(foo), %o1
3482         add     %l7, %o1, %o0, %tgd_add(foo)
3483         call    __tls_get_addr, %tgd_call(foo)
3484         sethi   %tldm_hi22(foo), %l1
3485         add     %l1, %tldm_lo10(foo), %l2
3486         add     %l7, %l2, %o0, %tldm_add(foo)
3487         call    __tls_get_addr, %tldm_call(foo)
3488         sethi   %tldo_hix22(foo), %l3
3489         xor     %l3, %tldo_lox10(foo), %l4
3490         add     %o0, %l4, %l5, %tldo_add(foo)
3491         sethi   %tie_hi22(foo), %o3
3492         add     %o3, %tie_lo10(foo), %o3
3493         ld      [%l7 + %o3], %o2, %tie_ld(foo)
3494         add     %g7, %o2, %o4, %tie_add(foo)
3495         sethi   %tle_hix22(foo), %l1
3496         xor     %l1, %tle_lox10(foo), %o5
3497         ld      [%g7 + %o5], %o1"
3498         ;;
3499   tilepro*-*-*)
3500       conftest_s='
3501         .section ".tdata","awT",@progbits
3502 foo:    .long   25
3503         .text
3504         addli   r0, zero, tls_gd(foo)
3505         auli    r0, zero, tls_gd_ha16(foo)
3506         addli   r0, r0, tls_gd_lo16(foo)
3507         jal     __tls_get_addr
3508         addli   r0, zero, tls_ie(foo)
3509         auli    r0, r0, tls_ie_ha16(foo)
3510         addli   r0, r0, tls_ie_lo16(foo)'
3511         tls_first_major=2
3512         tls_first_minor=22
3513         tls_as_opt="--fatal-warnings"
3514         ;;
3515   tilegx*-*-*)
3516       conftest_s='
3517         .section ".tdata","awT",@progbits
3518 foo:    .long   25
3519         .text
3520         shl16insli r0, zero, hw0_last_tls_gd(foo)
3521         shl16insli r0, zero, hw1_last_tls_gd(foo)
3522         shl16insli r0, r0,   hw0_tls_gd(foo)
3523         jal        __tls_get_addr
3524         shl16insli r0, zero, hw1_last_tls_ie(foo)
3525         shl16insli r0, r0,   hw0_tls_ie(foo)'
3526         tls_first_major=2
3527         tls_first_minor=22
3528         tls_as_opt="--fatal-warnings"
3529         ;;
3530   xtensa*-*-*)
3531     conftest_s='
3532         .section ".tdata","awT",@progbits
3533 foo:    .long   25
3534         .text
3535         movi    a8, foo@TLSFUNC
3536         movi    a10, foo@TLSARG
3537         callx8.tls a8, foo@TLSCALL'
3538         tls_first_major=2
3539         tls_first_minor=19
3540         ;;
3541 changequote([,])dnl
3542 esac
3543 set_have_as_tls=no
3544 if test "x$enable_tls" = xno ; then
3545   : # TLS explicitly disabled.
3546 elif test "x$enable_tls" = xyes ; then
3547   set_have_as_tls=yes # TLS explicitly enabled.
3548 elif test -z "$tls_first_major"; then
3549   : # If we don't have a check, assume no support.
3550 else
3551   gcc_GAS_CHECK_FEATURE(thread-local storage support, gcc_cv_as_tls,
3552   [$tls_first_major,$tls_first_minor,0], [$tls_as_opt], [$conftest_s],,
3553   [set_have_as_tls=yes])
3554 fi
3555 if test $set_have_as_tls = yes ; then
3556   AC_DEFINE(HAVE_AS_TLS, 1,
3557             [Define if your assembler and linker support thread-local storage.])
3558 fi
3559
3560 # Target-specific assembler checks.
3561
3562 AC_MSG_CHECKING(linker -Bstatic/-Bdynamic option)
3563 gcc_cv_ld_static_dynamic=no
3564 gcc_cv_ld_static_option='-Bstatic'
3565 gcc_cv_ld_dynamic_option='-Bdynamic'
3566 if test $in_tree_ld = yes ; then
3567   if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 10 -o "$gcc_cv_gld_major_version" -gt 2; then
3568     gcc_cv_ld_static_dynamic=yes
3569   fi
3570 elif test x$gcc_cv_ld != x; then
3571   # Check if linker supports -Bstatic/-Bdynamic option
3572   if $gcc_cv_ld --help 2>&1 | grep -- -Bstatic > /dev/null \
3573      && $gcc_cv_ld --help 2>&1 | grep -- -Bdynamic > /dev/null; then
3574       gcc_cv_ld_static_dynamic=yes
3575   else
3576     case "$target" in
3577       # AIX ld uses -b flags
3578       *-*-aix4.[[23]]* | *-*-aix[[5-9]]*)
3579         gcc_cv_ld_static_dynamic=yes
3580         gcc_cv_ld_static_option="-bstatic"
3581         gcc_cv_ld_dynamic_option="-bdynamic"
3582         ;;
3583       # HP-UX ld uses -a flags to select between shared and archive.
3584       *-*-hpux*)
3585         if test x"$gnu_ld" = xno; then
3586           gcc_cv_ld_static_dynamic=yes
3587           gcc_cv_ld_static_option="-aarchive_shared"
3588           gcc_cv_ld_dynamic_option="-adefault"
3589         fi
3590         ;;
3591       # Solaris 2 ld always supports -Bstatic/-Bdynamic.
3592       *-*-solaris2*)
3593         gcc_cv_ld_static_dynamic=yes
3594         ;;
3595     esac
3596   fi
3597 fi
3598 if test x"$gcc_cv_ld_static_dynamic" = xyes; then
3599         AC_DEFINE(HAVE_LD_STATIC_DYNAMIC, 1,
3600 [Define if your linker supports -Bstatic/-Bdynamic or equivalent options.])
3601         AC_DEFINE_UNQUOTED(LD_STATIC_OPTION, "$gcc_cv_ld_static_option",
3602 [Define to the linker option to disable use of shared objects.])
3603         AC_DEFINE_UNQUOTED(LD_DYNAMIC_OPTION, "$gcc_cv_ld_dynamic_option",
3604 [Define to the linker option to enable use of shared objects.])
3605 fi
3606 AC_MSG_RESULT($gcc_cv_ld_static_dynamic)
3607
3608 if test x"$demangler_in_ld" = xyes; then
3609   AC_MSG_CHECKING(linker --demangle support)
3610   gcc_cv_ld_demangle=no
3611   if test $in_tree_ld = yes; then
3612     if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 14 -o "$gcc_cv_gld_major_version" -gt 2; then \
3613       gcc_cv_ld_demangle=yes
3614     fi
3615   elif test x$gcc_cv_ld != x -a x"$gnu_ld" = xyes; then
3616     # Check if the GNU linker supports --demangle option
3617     if $gcc_cv_ld --help 2>&1 | grep no-demangle > /dev/null; then
3618       gcc_cv_ld_demangle=yes
3619     fi
3620   fi
3621   if test x"$gcc_cv_ld_demangle" = xyes; then
3622     AC_DEFINE(HAVE_LD_DEMANGLE, 1,
3623 [Define if your linker supports --demangle option.])
3624   fi
3625   AC_MSG_RESULT($gcc_cv_ld_demangle)
3626 fi
3627
3628 AC_MSG_CHECKING(linker plugin support)
3629 gcc_cv_lto_plugin=0
3630 if test -f liblto_plugin.la; then
3631   save_ld_ver="$ld_ver"
3632   save_ld_vers_major="$ld_vers_major"
3633   save_ld_vers_minor="$ld_vers_minor"
3634   save_ld_is_gold="$ld_is_gold"
3635
3636   ld_is_gold=no
3637
3638   if test $in_tree_ld = yes -a x"$ORIGINAL_PLUGIN_LD_FOR_TARGET" = x"$gcc_cv_ld"; then
3639     ld_ver="GNU ld"
3640     # FIXME: ld_is_gold?
3641     ld_vers_major="$gcc_cv_gld_major_version"
3642     ld_vers_minor="$gcc_cv_gld_minor_version"
3643   else
3644     # Determine plugin linker version.
3645     # FIXME: Partial duplicate from above, generalize.
3646 changequote(,)dnl
3647     ld_ver=`$ORIGINAL_PLUGIN_LD_FOR_TARGET --version 2>/dev/null | sed 1q`
3648     if echo "$ld_ver" | grep GNU > /dev/null; then
3649       if echo "$ld_ver" | grep "GNU gold" > /dev/null; then
3650         ld_is_gold=yes
3651         ld_vers=`echo $ld_ver | sed -n \
3652             -e 's,^[^)]*[        ]\([0-9][0-9]*\.[0-9][0-9]*[^)]*\)) .*$,\1,p'`
3653       else
3654         ld_vers=`echo $ld_ver | sed -n \
3655             -e 's,^.*[   ]\([0-9][0-9]*\.[0-9][0-9]*.*\)$,\1,p'`
3656       fi
3657       ld_vers_major=`expr "$ld_vers" : '\([0-9]*\)'`
3658       ld_vers_minor=`expr "$ld_vers" : '[0-9]*\.\([0-9]*\)'`
3659     fi
3660 changequote([,])dnl
3661   fi
3662
3663   # Determine plugin support.
3664   if echo "$ld_ver" | grep GNU > /dev/null; then
3665     # Require GNU ld or gold 2.21+ for plugin support by default.
3666     if test "$ld_vers_major" -eq 2 -a "$ld_vers_minor" -ge 21; then
3667       gcc_cv_lto_plugin=2
3668     # Allow -fuse-linker-plugin to enable plugin support in GNU gold 2.20.
3669     elif test "$ld_is_gold" = yes -a "$ld_vers_major" -eq 2 -a "$ld_vers_minor" -eq 20; then
3670       gcc_cv_lto_plugin=1
3671     fi
3672   fi
3673
3674   ld_ver="$save_ld_ver"
3675   ld_vers_major="$save_ld_vers_major"
3676   ld_vers_minor="$save_ld_vers_minor"
3677   ld_is_gold="$save_ld_is_gold"
3678 fi
3679 AC_DEFINE_UNQUOTED(HAVE_LTO_PLUGIN, $gcc_cv_lto_plugin,
3680   [Define to the level of your linker's plugin support.])
3681 AC_MSG_RESULT($gcc_cv_lto_plugin)
3682
3683 # Target OS-specific assembler checks.
3684
3685 case "$target_os" in
3686   darwin*)
3687     gcc_GAS_CHECK_FEATURE([-mmacosx-version-min option],
3688       gcc_cv_as_mmacosx_version_min,,
3689       [-mmacosx-version-min=10.1], [.text],,
3690       [AC_DEFINE(HAVE_AS_MMACOSX_VERSION_MIN_OPTION, 1,
3691         [Define if your Mac OS X assembler supports the -mmacos-version-min option.])])
3692     ;;
3693 esac
3694
3695 # Target CPU-specific assembler checks.
3696
3697 case "$target" in
3698   aarch64*-*-*)
3699     gcc_GAS_CHECK_FEATURE([-mabi option], gcc_cv_as_aarch64_mabi,,
3700                           [-mabi=lp64], [.text],,,)
3701     if test x$gcc_cv_as_aarch64_mabi = xyes; then
3702       AC_DEFINE(HAVE_AS_MABI_OPTION, 1,
3703                 [Define if your assembler supports the -mabi option.])
3704     else
3705       if test x$with_abi = xilp32; then
3706         AC_MSG_ERROR([Assembler does not support -mabi=ilp32.\
3707                      Upgrade the Assembler.])
3708       fi
3709       if test x"$with_multilib_list" = xdefault; then
3710         TM_MULTILIB_CONFIG=lp64
3711       else
3712         aarch64_multilibs=`echo $with_multilib_list | sed -e 's/,/ /g'`
3713         for aarch64_multilib in ${aarch64_multilibs}; do
3714           case ${aarch64_multilib} in
3715             ilp32)
3716               AC_MSG_ERROR([Assembler does not support -mabi=ilp32.\
3717                             Upgrade the Assembler.])
3718               ;;
3719             *)
3720               ;;
3721           esac
3722         done
3723       fi
3724     fi
3725     # Check if we have binutils support for relocations types needed by -fpic
3726     gcc_GAS_CHECK_FEATURE([-fpic relocs], gcc_cv_as_aarch64_picreloc,,,
3727     [
3728         .text
3729         ldr     x0, [[x2, #:gotpage_lo15:globalsym]]
3730     ],,[AC_DEFINE(HAVE_AS_SMALL_PIC_RELOCS, 1,
3731         [Define if your assembler supports relocs needed by -fpic.])])
3732     # Enable default workaround for AArch64 Cortex-A53 erratum 835769.
3733     AC_ARG_ENABLE(fix-cortex-a53-835769,
3734     [
3735 AS_HELP_STRING([--enable-fix-cortex-a53-835769],
3736         [enable workaround for AArch64 Cortex-A53 erratum 835769 by default])
3737 AS_HELP_STRING([--disable-fix-cortex-a53-835769],
3738         [disable workaround for AArch64 Cortex-A53 erratum 835769 by default])
3739     ],
3740       [
3741         case $enableval in
3742           yes)
3743             tm_defines="${tm_defines} TARGET_FIX_ERR_A53_835769_DEFAULT=1"
3744             ;;
3745           no)
3746             ;;
3747           *)
3748             AC_MSG_ERROR(['$enableval' is an invalid value for --enable-fix-cortex-a53-835769.\
3749   Valid choices are 'yes' and 'no'.])
3750             ;;
3751
3752         esac
3753       ],
3754     [])
3755     # Enable default workaround for AArch64 Cortex-A53 erratum 843419.
3756     AC_ARG_ENABLE(fix-cortex-a53-843419,
3757     [
3758 AS_HELP_STRING([--enable-fix-cortex-a53-843419],
3759         [enable workaround for AArch64 Cortex-A53 erratum 843419 by default])
3760 AS_HELP_STRING([--disable-fix-cortex-a53-843419],
3761         [disable workaround for AArch64 Cortex-A53 erratum 843419 by default])
3762     ],
3763       [
3764         case $enableval in
3765           yes)
3766             tm_defines="${tm_defines} TARGET_FIX_ERR_A53_843419_DEFAULT=1"
3767             ;;
3768           no)
3769             ;;
3770           *)
3771             AC_MSG_ERROR(['$enableval' is an invalid value for --enable-fix-cortex-a53-843419.\
3772   Valid choices are 'yes' and 'no'.])
3773             ;;
3774
3775         esac
3776       ],
3777     [])
3778     ;;
3779
3780   # All TARGET_ABI_OSF targets.
3781   alpha*-*-linux* | alpha*-*-*bsd*)
3782     gcc_GAS_CHECK_FEATURE([explicit relocation support],
3783         gcc_cv_as_alpha_explicit_relocs, [2,12,0],,
3784 [       .set nomacro
3785         .text
3786         extbl   $3, $2, $3      !lituse_bytoff!1
3787         ldq     $2, a($29)      !literal!1
3788         ldq     $4, b($29)      !literal!2
3789         ldq_u   $3, 0($2)       !lituse_base!1
3790         ldq     $27, f($29)     !literal!5
3791         jsr     $26, ($27), f   !lituse_jsr!5
3792         ldah    $29, 0($26)     !gpdisp!3
3793         lda     $0, c($29)      !gprel
3794         ldah    $1, d($29)      !gprelhigh
3795         lda     $1, d($1)       !gprellow
3796         lda     $29, 0($29)     !gpdisp!3],,
3797     [AC_DEFINE(HAVE_AS_EXPLICIT_RELOCS, 1,
3798   [Define if your assembler supports explicit relocations.])])
3799     gcc_GAS_CHECK_FEATURE([jsrdirect relocation support],
3800         gcc_cv_as_alpha_jsrdirect_relocs, [2,16,90],,
3801 [       .set nomacro
3802         .text
3803         ldq     $27, a($29)     !literal!1
3804         jsr     $26, ($27), a   !lituse_jsrdirect!1],,
3805     [AC_DEFINE(HAVE_AS_JSRDIRECT_RELOCS, 1,
3806   [Define if your assembler supports the lituse_jsrdirect relocation.])])
3807     ;;
3808
3809   avr-*-*)
3810     gcc_GAS_CHECK_FEATURE([--mlink-relax option], gcc_cv_as_avr_mlink_relax,,
3811       [--mlink-relax], [.text],,
3812       [AC_DEFINE(HAVE_AS_AVR_MLINK_RELAX_OPTION, 1,
3813                 [Define if your avr assembler supports --mlink-relax option.])])
3814
3815     gcc_GAS_CHECK_FEATURE([-mrmw option], gcc_cv_as_avr_mrmw,,
3816       [-mrmw], [.text],,
3817       [AC_DEFINE(HAVE_AS_AVR_MRMW_OPTION, 1,
3818                 [Define if your avr assembler supports -mrmw option.])])
3819
3820     gcc_GAS_CHECK_FEATURE([__gcc_isr pseudo instruction],
3821       gcc_cv_as_avr_mgccisr,,
3822       [-mgcc-isr], [.text
3823                     __gcc_isr 1
3824                     __gcc_isr 2
3825                     __gcc_isr 0,r24
3826                    ],,
3827       [AC_DEFINE(HAVE_AS_AVR_MGCCISR_OPTION, 1,
3828                 [Define if your avr assembler supports -mgcc-isr option.])])
3829
3830     # Check how default linker description file implements .rodata for
3831     # avrxmega3 (PR21472).  avr-gcc assumes .rodata is *not* loaded to
3832     # RAM so avr-gcc skips __do_copy_data for .rodata objects.
3833     AC_MSG_CHECKING(binutils for avrxmega3 .rodata support)
3834     cat > conftest.s <<EOF
3835         .section .rodata,"a",@progbits
3836         .global xxvaryy
3837     ;; avr-nm should print "... R xxvaryy", not "... D xxvaryy".
3838     xxvaryy:
3839         .word 1
3840 EOF
3841     rm -f conftest.nm
3842     AC_TRY_COMMAND([$gcc_cv_as -mmcu=avrxmega3 conftest.s -o conftest.o])
3843     AC_TRY_COMMAND([$gcc_cv_ld -mavrxmega3 conftest.o -o conftest.elf])
3844     AC_TRY_COMMAND([$gcc_cv_nm conftest.elf > conftest.nm])
3845     if test -s conftest.nm
3846     then
3847         if grep ' R xxvaryy' conftest.nm > /dev/null; then
3848             AC_MSG_RESULT(yes)
3849             AC_DEFINE(HAVE_LD_AVR_AVRXMEGA3_RODATA_IN_FLASH, 1,
3850                 [Define if your default avr linker script for avrxmega3 leaves .rodata in flash.])
3851         else
3852             AC_MSG_RESULT(no: avrxmega3 .rodata located in RAM)
3853             echo "$as_me: nm output was" >&AS_MESSAGE_LOG_FD
3854             cat conftest.nm >&AS_MESSAGE_LOG_FD
3855             avr_ld_ver="`$gcc_cv_ld -v | sed -e 's:^.* ::'`"
3856             AC_MSG_WARN([[support for avrxmega3 .rodata in flash needs Binutils 2.29 or higher (have $avr_ld_ver)]])
3857         fi
3858     else
3859         AC_MSG_RESULT(test failed)
3860         echo "$as_me: failed program was" >&AS_MESSAGE_LOG_FD
3861         cat conftest.s >&AS_MESSAGE_LOG_FD
3862         AC_MSG_WARN([[see `config.log' for details]])
3863     fi
3864     rm -f conftest.s conftest.o conftest.elf conftest.nm
3865     ;;
3866
3867   cris-*-*)
3868     gcc_GAS_CHECK_FEATURE([-no-mul-bug-abort option],
3869       gcc_cv_as_cris_no_mul_bug,[2,15,91],
3870       [-no-mul-bug-abort], [.text],,
3871       [AC_DEFINE(HAVE_AS_NO_MUL_BUG_ABORT_OPTION, 1,
3872                 [Define if your assembler supports the -no-mul-bug-abort option.])])
3873     ;;
3874
3875   sparc*-*-*)
3876     gcc_GAS_CHECK_FEATURE([.register], gcc_cv_as_sparc_register_op,,,
3877       [.register %g2, #scratch],,
3878       [AC_DEFINE(HAVE_AS_REGISTER_PSEUDO_OP, 1,
3879                 [Define if your assembler supports .register.])])
3880
3881     gcc_GAS_CHECK_FEATURE([-relax option], gcc_cv_as_sparc_relax,,
3882       [-relax], [.text],,
3883       [AC_DEFINE(HAVE_AS_RELAX_OPTION, 1,
3884                 [Define if your assembler supports -relax option.])])
3885
3886     gcc_GAS_CHECK_FEATURE([GOTDATA_OP relocs],
3887       gcc_cv_as_sparc_gotdata_op,,
3888       [-K PIC],
3889 [.text
3890 .align 4
3891 foo:
3892         nop
3893 bar:
3894         sethi %gdop_hix22(foo), %g1
3895         xor    %g1, %gdop_lox10(foo), %g1
3896         ld    [[%l7 + %g1]], %g2, %gdop(foo)],
3897       [if test x$gcc_cv_ld != x \
3898        && $gcc_cv_ld -o conftest conftest.o -G > /dev/null 2>&1; then
3899          if test x$gcc_cv_objdump != x; then
3900            if $gcc_cv_objdump -s -j .text conftest 2> /dev/null \
3901               | grep ' 03000004 82186004 c405c001'> /dev/null 2>&1; then
3902                gcc_cv_as_sparc_gotdata_op=no
3903            else
3904                gcc_cv_as_sparc_gotdata_op=yes
3905            fi
3906          fi
3907        fi
3908        rm -f conftest],
3909       [AC_DEFINE(HAVE_AS_SPARC_GOTDATA_OP, 1,
3910                 [Define if your assembler and linker support GOTDATA_OP relocs.])])
3911
3912     gcc_GAS_CHECK_FEATURE([unaligned pcrel relocs],
3913       gcc_cv_as_sparc_ua_pcrel,,
3914       [-K PIC],
3915 [.text
3916 foo:
3917         nop
3918 .data
3919 .align 4
3920 .byte 0
3921 .uaword %r_disp32(foo)],
3922       [if test x$gcc_cv_ld != x \
3923        && $gcc_cv_ld -o conftest conftest.o -G > /dev/null 2>&1; then
3924          gcc_cv_as_sparc_ua_pcrel=yes
3925        fi
3926        rm -f conftest],
3927       [AC_DEFINE(HAVE_AS_SPARC_UA_PCREL, 1,
3928                 [Define if your assembler and linker support unaligned PC relative relocs.])
3929
3930       gcc_GAS_CHECK_FEATURE([unaligned pcrel relocs against hidden symbols],
3931         gcc_cv_as_sparc_ua_pcrel_hidden,,
3932         [-K PIC],
3933 [.data
3934 .align 4
3935 .byte 0x31
3936 .uaword %r_disp32(foo)
3937 .byte 0x32, 0x33, 0x34
3938 .global foo
3939 .hidden foo
3940 foo:
3941 .skip 4],
3942         [if test x$gcc_cv_ld != x && test x$gcc_cv_objdump != x \
3943          && $gcc_cv_ld -o conftest conftest.o -G > /dev/null 2>&1 \
3944          && $gcc_cv_objdump -s -j .data conftest 2> /dev/null \
3945             | grep ' 31000000 07323334' > /dev/null 2>&1; then
3946             if $gcc_cv_objdump -R conftest 2> /dev/null \
3947                | grep 'DISP32' > /dev/null 2>&1; then
3948                 :
3949             else
3950                 gcc_cv_as_sparc_ua_pcrel_hidden=yes
3951             fi
3952          fi
3953          rm -f conftest],
3954          [AC_DEFINE(HAVE_AS_SPARC_UA_PCREL_HIDDEN, 1,
3955                    [Define if your assembler and linker support unaligned PC relative relocs against hidden symbols.])])
3956     ]) # unaligned pcrel relocs
3957
3958     gcc_GAS_CHECK_FEATURE([offsetable %lo()],
3959       gcc_cv_as_sparc_offsetable_lo10,,
3960       [-xarch=v9],
3961 [.text
3962         or %g1, %lo(ab) + 12, %g1
3963         or %g1, %lo(ab + 12), %g1],
3964       [if test x$gcc_cv_objdump != x \
3965        && $gcc_cv_objdump -s -j .text conftest.o 2> /dev/null \
3966           | grep ' 82106000 82106000' > /dev/null 2>&1; then
3967          gcc_cv_as_sparc_offsetable_lo10=yes
3968        fi],
3969        [AC_DEFINE(HAVE_AS_OFFSETABLE_LO10, 1,
3970                  [Define if your assembler supports offsetable %lo().])])
3971
3972     gcc_GAS_CHECK_FEATURE([FMAF, HPC, and VIS 3.0 instructions],
3973       gcc_cv_as_sparc_fmaf,,
3974       [-xarch=v9d],
3975       [.text
3976        .register %g2, #scratch
3977        .register %g3, #scratch
3978        .align 4
3979        fmaddd %f0, %f2, %f4, %f6
3980        addxccc %g1, %g2, %g3
3981        fsrl32 %f2, %f4, %f8
3982        fnaddd %f10, %f12, %f14],,
3983       [AC_DEFINE(HAVE_AS_FMAF_HPC_VIS3, 1,
3984                 [Define if your assembler supports FMAF, HPC, and VIS 3.0 instructions.])])
3985
3986     gcc_GAS_CHECK_FEATURE([SPARC4 instructions],
3987       gcc_cv_as_sparc_sparc4,,
3988       [-xarch=sparc4],
3989       [.text
3990        .register %g2, #scratch
3991        .register %g3, #scratch
3992        .align 4
3993        cxbe %g2, %g3, 1f
3994 1:     cwbneg %g2, %g3, 1f
3995 1:     sha1
3996        md5
3997        aes_kexpand0 %f4, %f6, %f8
3998        des_round %f38, %f40, %f42, %f44
3999        camellia_f %f54, %f56, %f58, %f60
4000        kasumi_fi_xor %f46, %f48, %f50, %f52],,
4001       [AC_DEFINE(HAVE_AS_SPARC4, 1,
4002                 [Define if your assembler supports SPARC4 instructions.])])
4003
4004     gcc_GAS_CHECK_FEATURE([SPARC5 and VIS 4.0 instructions],
4005       gcc_cv_as_sparc_sparc5,,
4006       [-xarch=sparc5],
4007       [.text
4008        .register %g2, #scratch
4009        .register %g3, #scratch
4010        .align 4
4011        subxc %g1, %g2, %g3
4012        fpadd8 %f0, %f2, %f4],,
4013       [AC_DEFINE(HAVE_AS_SPARC5_VIS4, 1,
4014                 [Define if your assembler supports SPARC5 and VIS 4.0 instructions.])])
4015
4016     gcc_GAS_CHECK_FEATURE([SPARC6 instructions],
4017       gcc_cv_as_sparc_sparc6,,
4018       [-xarch=sparc6],
4019       [.text
4020        .register %g2, #scratch
4021        .register %g3, #scratch
4022        .align 4
4023        rd %entropy, %g1
4024        fpsll64x %f0, %f2, %f4],,
4025       [AC_DEFINE(HAVE_AS_SPARC6, 1,
4026                 [Define if your assembler supports SPARC6 instructions.])])
4027
4028     gcc_GAS_CHECK_FEATURE([LEON instructions],
4029       gcc_cv_as_sparc_leon,,
4030       [-Aleon],
4031       [.text
4032        .register %g2, #scratch
4033        .register %g3, #scratch
4034        .align 4
4035        smac %g2, %g3, %g1
4036        umac %g2, %g3, %g1
4037        casa [[%g2]] 0xb, %g3, %g1],,
4038       [AC_DEFINE(HAVE_AS_LEON, 1,
4039                 [Define if your assembler supports LEON instructions.])])
4040     ;;
4041
4042 changequote(,)dnl
4043   i[34567]86-*-* | x86_64-*-*)
4044 changequote([,])dnl
4045     case $target_os in
4046       cygwin*)
4047         # Full C++ conformance when using a shared libstdc++-v3 requires some
4048         # support from the Cygwin DLL, which in more recent versions exports
4049         # wrappers to aid in interposing and redirecting operators new, delete,
4050         # etc., as per n2800 #17.6.4.6 [replacement.functions].  Check if we
4051         # are configuring for a version of Cygwin that exports the wrappers.
4052         if test x$host = x$target && test x$host_cpu = xi686; then
4053           AC_CHECK_FUNC([__wrap__Znaj],[gcc_ac_cygwin_dll_wrappers=yes],[gcc_ac_cygwin_dll_wrappers=no])
4054         else
4055           # Can't check presence of libc functions during cross-compile, so
4056           # we just have to assume we're building for an up-to-date target.
4057           gcc_ac_cygwin_dll_wrappers=yes
4058         fi
4059         AC_DEFINE_UNQUOTED(USE_CYGWIN_LIBSTDCXX_WRAPPERS,
4060           [`if test $gcc_ac_cygwin_dll_wrappers = yes; then echo 1; else echo 0; fi`],
4061           [Define if you want to generate code by default that assumes that the
4062            Cygwin DLL exports wrappers to support libstdc++ function replacement.])
4063     esac
4064     case $target_os in
4065       cygwin* | pe | mingw32*)
4066         # Recent binutils allows the three-operand form of ".comm" on PE.  This
4067         # definition is used unconditionally to initialise the default state of
4068         # the target option variable that governs usage of the feature.
4069         gcc_GAS_CHECK_FEATURE([.comm with alignment], gcc_cv_as_comm_has_align,
4070          [2,19,52],,[.comm foo,1,32])
4071         AC_DEFINE_UNQUOTED(HAVE_GAS_ALIGNED_COMM,
4072           [`if test $gcc_cv_as_comm_has_align = yes; then echo 1; else echo 0; fi`],
4073           [Define if your assembler supports specifying the alignment
4074            of objects allocated using the GAS .comm command.])
4075         # Used for DWARF 2 in PE
4076         gcc_GAS_CHECK_FEATURE([.secrel32 relocs],
4077           gcc_cv_as_ix86_pe_secrel32,
4078           [2,15,91],,
4079 [.text
4080 foo:    nop
4081 .data
4082         .secrel32 foo],
4083           [if test x$gcc_cv_ld != x \
4084            && $gcc_cv_ld -o conftest conftest.o > /dev/null 2>&1; then
4085              gcc_cv_as_ix86_pe_secrel32=yes
4086            fi
4087            rm -f conftest],
4088           [AC_DEFINE(HAVE_GAS_PE_SECREL32_RELOC, 1,
4089             [Define if your assembler and linker support 32-bit section relative relocs via '.secrel32 label'.])])
4090         # Test if the assembler supports the extended form of the .section
4091         # directive that specifies section alignment.  LTO support uses this,
4092         # but normally only after installation, so we warn but don't fail the
4093         # configure if LTO is enabled but the assembler does not support it.
4094         gcc_GAS_CHECK_FEATURE([.section with alignment], gcc_cv_as_section_has_align,
4095           [2,20,1],-fatal-warnings,[.section lto_test,"dr0"])
4096         if test x$gcc_cv_as_section_has_align != xyes; then
4097           case ",$enable_languages," in
4098             *,lto,*)
4099               AC_MSG_WARN([LTO for $target requires binutils >= 2.20.1, but version found appears insufficient; LTO will not work until binutils is upgraded.])
4100               ;;
4101           esac
4102         fi
4103         ;;
4104     esac
4105
4106     gcc_GAS_CHECK_FEATURE([-xbrace_comment], gcc_cv_as_ix86_xbrace_comment,,
4107       [-xbrace_comment=no], [.text],,
4108       [AC_DEFINE(HAVE_AS_XBRACE_COMMENT_OPTION, 1,
4109                 [Define if your assembler supports -xbrace_comment option.])])
4110
4111     # Test if the assembler supports the section flag 'e' for specifying
4112     # an excluded section.
4113     gcc_GAS_CHECK_FEATURE([.section with e], gcc_cv_as_section_has_e,
4114       [2,22,51], [--fatal-warnings],
4115 [.section foo1,"e"
4116 .byte 0,0,0,0])
4117     AC_DEFINE_UNQUOTED(HAVE_GAS_SECTION_EXCLUDE,
4118       [`if test $gcc_cv_as_section_has_e = yes; then echo 1; else echo 0; fi`],
4119       [Define if your assembler supports specifying the section flag e.])
4120
4121     gcc_GAS_CHECK_FEATURE([filds and fists mnemonics],
4122        gcc_cv_as_ix86_filds,,,
4123        [filds (%ebp); fists (%ebp)],,
4124        [AC_DEFINE(HAVE_AS_IX86_FILDS, 1,
4125          [Define if your assembler uses filds and fists mnemonics.])])
4126
4127     gcc_GAS_CHECK_FEATURE([fildq and fistpq mnemonics],
4128        gcc_cv_as_ix86_fildq,,,
4129        [fildq (%ebp); fistpq (%ebp)],,
4130        [AC_DEFINE(HAVE_AS_IX86_FILDQ, 1,
4131          [Define if your assembler uses fildq and fistq mnemonics.])])
4132
4133     gcc_GAS_CHECK_FEATURE([cmov syntax],
4134       gcc_cv_as_ix86_cmov_sun_syntax,,,
4135       [cmovl.l %edx, %eax],,
4136       [AC_DEFINE(HAVE_AS_IX86_CMOV_SUN_SYNTAX, 1,
4137         [Define if your assembler supports the Sun syntax for cmov.])])
4138
4139     gcc_GAS_CHECK_FEATURE([ffreep mnemonic],
4140       gcc_cv_as_ix86_ffreep,,,
4141       [ffreep %st(1)],,
4142       [AC_DEFINE(HAVE_AS_IX86_FFREEP, 1,
4143         [Define if your assembler supports the ffreep mnemonic.])])
4144
4145     gcc_GAS_CHECK_FEATURE([.quad directive],
4146       gcc_cv_as_ix86_quad,,,
4147       [.quad 0],,
4148       [AC_DEFINE(HAVE_AS_IX86_QUAD, 1,
4149         [Define if your assembler supports the .quad directive.])])
4150
4151     gcc_GAS_CHECK_FEATURE([sahf mnemonic],
4152       gcc_cv_as_ix86_sahf,,,
4153       [.code64
4154        sahf],,
4155       [AC_DEFINE(HAVE_AS_IX86_SAHF, 1,
4156         [Define if your assembler supports the sahf mnemonic in 64bit mode.])])
4157
4158     gcc_GAS_CHECK_FEATURE([interunit movq mnemonic],
4159       gcc_cv_as_ix86_interunit_movq,,,
4160       [.code64
4161        movq %mm0, %rax
4162        movq %rax, %xmm0])
4163     AC_DEFINE_UNQUOTED(HAVE_AS_IX86_INTERUNIT_MOVQ,
4164       [`if test $gcc_cv_as_ix86_interunit_movq = yes; then echo 1; else echo 0; fi`],
4165       [Define if your assembler supports interunit movq mnemonic.])
4166
4167     gcc_GAS_CHECK_FEATURE([hle prefixes],
4168       gcc_cv_as_ix86_hle,,,
4169       [lock xacquire cmpxchg %esi, (%ecx)],,
4170       [AC_DEFINE(HAVE_AS_IX86_HLE, 1,
4171         [Define if your assembler supports HLE prefixes.])])
4172
4173     gcc_GAS_CHECK_FEATURE([swap suffix],
4174       gcc_cv_as_ix86_swap,,,
4175       [movl.s %esp, %ebp],,
4176       [AC_DEFINE(HAVE_AS_IX86_SWAP, 1,
4177         [Define if your assembler supports the swap suffix.])])
4178
4179     gcc_GAS_CHECK_FEATURE([different section symbol subtraction],
4180       gcc_cv_as_ix86_diff_sect_delta,,,
4181       [.section .rodata
4182 .L1:
4183         .long .L2-.L1
4184         .long .L3-.L1
4185         .text
4186 .L3:    nop
4187 .L2:    nop],,
4188       [AC_DEFINE(HAVE_AS_IX86_DIFF_SECT_DELTA, 1,
4189         [Define if your assembler supports the subtraction of symbols in different sections.])])
4190
4191     gcc_GAS_CHECK_FEATURE([rep and lock prefix],
4192         gcc_cv_as_ix86_rep_lock_prefix,,,
4193         [rep movsl
4194          rep ret
4195          rep nop
4196          rep bsf %ecx, %eax
4197          rep bsr %ecx, %eax
4198          lock addl %edi, (%eax,%esi)
4199          lock orl $0, (%esp)],,
4200         [AC_DEFINE(HAVE_AS_IX86_REP_LOCK_PREFIX, 1,
4201           [Define if the assembler supports 'rep <insn>, lock <insn>'.])])
4202
4203     gcc_GAS_CHECK_FEATURE([ud2 mnemonic],
4204         gcc_cv_as_ix86_ud2,,,
4205         [ud2],,
4206       [AC_DEFINE(HAVE_AS_IX86_UD2, 1,
4207         [Define if your assembler supports the 'ud2' mnemonic.])])
4208
4209     # Enforce 32-bit output with gas and gld.
4210     if test x$gas = xyes; then
4211       as_ix86_gas_32_opt="--32"
4212     fi
4213     if echo "$ld_ver" | grep GNU > /dev/null; then
4214       if $gcc_cv_ld -V 2>/dev/null | grep elf_i386_sol2 > /dev/null; then
4215         ld_ix86_gld_32_opt="-melf_i386_sol2"
4216       else
4217         ld_ix86_gld_32_opt="-melf_i386"
4218       fi
4219     fi
4220
4221     gcc_GAS_CHECK_FEATURE([R_386_TLS_GD_PLT reloc],
4222         gcc_cv_as_ix86_tlsgdplt,,
4223         [$as_ix86_gas_32_opt],
4224         [call    tls_gd@tlsgdplt],
4225         [if test x$gcc_cv_ld != x \
4226          && $gcc_cv_ld $ld_ix86_gld_32_opt -o conftest conftest.o -G > /dev/null 2>&1; then
4227            gcc_cv_as_ix86_tlsgdplt=yes
4228          fi
4229          rm -f conftest],
4230       [AC_DEFINE(HAVE_AS_IX86_TLSGDPLT, 1,
4231         [Define if your assembler and linker support @tlsgdplt.])])
4232
4233     conftest_s='
4234         .section .tdata,"aw'$tls_section_flag'",@progbits
4235 tls_ld:
4236         .section .text,"ax",@progbits
4237          call    tls_ld@tlsldmplt'
4238
4239     gcc_GAS_CHECK_FEATURE([R_386_TLS_LDM_PLT reloc],
4240         gcc_cv_as_ix86_tlsldmplt,,
4241         [$as_ix86_gas_32_opt],
4242         [$conftest_s],
4243         [if test x$gcc_cv_ld != x \
4244          && $gcc_cv_ld $ld_ix86_gld_32_opt -o conftest conftest.o -G > /dev/null 2>&1; then
4245            gcc_cv_as_ix86_tlsldmplt=yes
4246          fi
4247          rm -f conftest])
4248     AC_DEFINE_UNQUOTED(HAVE_AS_IX86_TLSLDMPLT,
4249       [`if test $gcc_cv_as_ix86_tlsldmplt = yes; then echo 1; else echo 0; fi`],
4250       [Define to 1 if your assembler and linker support @tlsldmplt.])
4251
4252     conftest_s='
4253         .section .text,"ax",@progbits
4254         .globl  _start
4255         .type   _start, @function
4256 _start:
4257         leal    value@tlsldm(%ebx), %eax
4258         call    ___tls_get_addr@plt
4259
4260         .section .tdata,"aw'$tls_section_flag'",@progbits
4261         .type   value, @object
4262 value:'
4263     gcc_GAS_CHECK_FEATURE([R_386_TLS_LDM reloc],
4264         gcc_cv_as_ix86_tlsldm,,
4265         [$as_ix86_gas_32_opt],
4266         [$conftest_s],
4267         [if test x$gcc_cv_ld != x && test x$gcc_cv_objdump != x \
4268             && $gcc_cv_ld $ld_ix86_gld_32_opt -o conftest conftest.o $ld_tls_libs -lc > /dev/null 2>&1; then
4269            if $gcc_cv_objdump -d conftest 2>/dev/null | grep nop > /dev/null \
4270               || dis conftest 2>/dev/null | grep nop > /dev/null; then
4271              gcc_cv_as_ix86_tlsldm=yes
4272            fi
4273          fi
4274          rm -f conftest])
4275     AC_DEFINE_UNQUOTED(HAVE_AS_IX86_TLSLDM,
4276       [`if test $gcc_cv_as_ix86_tlsldm = yes; then echo 1; else echo 0; fi`],
4277       [Define to 1 if your assembler and linker support @tlsldm.])
4278
4279     conftest_s='
4280         .data
4281 bar:
4282         .byte 1
4283         .text
4284         .global _start
4285 _start:
4286          cmpl $0, bar@GOT
4287          jmp *_start@GOT'
4288     gcc_GAS_CHECK_FEATURE([R_386_GOT32X reloc],
4289         gcc_cv_as_ix86_got32x,,
4290         [$as_ix86_gas_32_opt],
4291         [$conftest_s],
4292         [if test x$gcc_cv_ld != x && test x$gcc_cv_objdump != x \
4293             && test x$gcc_cv_readelf != x \
4294             && $gcc_cv_readelf --relocs --wide conftest.o 2>&1 \
4295                | grep R_386_GOT32X > /dev/null 2>&1 \
4296             && $gcc_cv_ld $ld_ix86_gld_32_opt -o conftest conftest.o > /dev/null 2>&1; then
4297            if $gcc_cv_objdump -dw conftest 2>&1 \
4298               | grep 0xffffff > /dev/null 2>&1; then
4299              gcc_cv_as_ix86_got32x=no
4300            else
4301              gcc_cv_as_ix86_got32x=yes
4302            fi
4303          fi
4304          rm -f conftest])
4305     AC_DEFINE_UNQUOTED(HAVE_AS_IX86_GOT32X,
4306       [`if test x"$gcc_cv_as_ix86_got32x" = xyes; then echo 1; else echo 0; fi`],
4307       [Define 0/1 if your assembler and linker support @GOT.])
4308
4309     gcc_GAS_CHECK_FEATURE([GOTOFF in data],
4310       gcc_cv_as_ix86_gotoff_in_data, [2,11,0],
4311       [$as_ix86_gas_32_opt],
4312 [       .text
4313 .L0:
4314         nop
4315         .data
4316         .long .L0@GOTOFF])
4317     AC_DEFINE_UNQUOTED(HAVE_AS_GOTOFF_IN_DATA,
4318       [`if test $gcc_cv_as_ix86_gotoff_in_data = yes; then echo 1; else echo 0; fi`],
4319       [Define true if the assembler supports '.long foo@GOTOFF'.])
4320
4321     conftest_s='
4322         .section .text,"ax",@progbits
4323         .globl  _start
4324         .type   _start, @function
4325 _start:
4326         leal    ld@tlsldm(%ecx), %eax
4327         call    *___tls_get_addr@GOT(%ecx)
4328         leal    gd@tlsgd(%ecx), %eax
4329         call    *___tls_get_addr@GOT(%ecx)
4330
4331         .section .tdata,"aw'$tls_section_flag'",@progbits
4332         .type   ld, @object
4333 ld:
4334         .byte 0
4335         .globl  gd
4336         .type   gd, @object
4337 gd:
4338         .byte 0'
4339     gcc_GAS_CHECK_FEATURE([calling ___tls_get_addr via GOT],
4340         gcc_cv_as_ix86_tls_get_addr_via_got,,
4341         [$as_ix86_gas_32_opt],
4342         [$conftest_s],
4343         [if test x$gcc_cv_ld != x \
4344             && $gcc_cv_ld $ld_ix86_gld_32_opt -o conftest conftest.o > /dev/null 2>&1; then
4345            gcc_cv_as_ix86_tls_get_addr_via_got=yes
4346          fi
4347          rm -f conftest])
4348     AC_DEFINE_UNQUOTED(HAVE_AS_IX86_TLS_GET_ADDR_GOT,
4349       [`if test x"$gcc_cv_as_ix86_tls_get_addr_via_got" = xyes; then echo 1; else echo 0; fi`],
4350       [Define 0/1 if your assembler and linker support calling ___tls_get_addr via GOT.])
4351     ;;
4352
4353   ia64*-*-*)
4354     gcc_GAS_CHECK_FEATURE([ltoffx and ldxmov relocs],
4355         gcc_cv_as_ia64_ltoffx_ldxmov_relocs, [2,14,0],,
4356 [       .text
4357         addl r15 = @ltoffx(x#), gp
4358         ;;
4359         ld8.mov r16 = [[r15]], x#],,
4360     [AC_DEFINE(HAVE_AS_LTOFFX_LDXMOV_RELOCS, 1,
4361           [Define if your assembler supports ltoffx and ldxmov relocations.])])
4362
4363     ;;
4364
4365   powerpc*-*-*)
4366
4367     case $target in
4368       *-*-darwin*)
4369         gcc_GAS_CHECK_FEATURE([.machine directive support],
4370           gcc_cv_as_machine_directive,,,
4371           [     .machine ppc7400])
4372         if test x$gcc_cv_as_machine_directive != xyes; then
4373           echo "*** This target requires an assembler supporting \".machine\"" >&2
4374           echo you can get it from: ftp://gcc.gnu.org/pub/gcc/infrastructure/cctools-528.5.dmg >&2
4375           test x$build = x$target && exit 1
4376         fi
4377         ;;
4378     esac
4379
4380     case $target in
4381       *-*-aix*) conftest_s='    .machine "pwr5"
4382         .csect .text[[PR]]
4383         mfcr 3,128';;
4384       *-*-darwin*) conftest_s=' .text
4385         mfcr r3,128';;
4386       *) conftest_s='   .machine power4
4387         .text
4388         mfcr 3,128';;
4389     esac
4390
4391     gcc_GAS_CHECK_FEATURE([mfcr field support],
4392       gcc_cv_as_powerpc_mfcrf, [2,14,0],,
4393       [$conftest_s],,
4394       [AC_DEFINE(HAVE_AS_MFCRF, 1,
4395           [Define if your assembler supports mfcr field.])])
4396
4397     case $target in
4398       *-*-aix*) conftest_s='    .machine "pwr5"
4399         .csect .text[[PR]]
4400         popcntb 3,3';;
4401       *) conftest_s='   .machine power5
4402         .text
4403         popcntb 3,3';;
4404     esac
4405
4406     gcc_GAS_CHECK_FEATURE([popcntb support],
4407       gcc_cv_as_powerpc_popcntb, [2,17,0],,
4408       [$conftest_s],,
4409       [AC_DEFINE(HAVE_AS_POPCNTB, 1,
4410           [Define if your assembler supports popcntb field.])])
4411
4412     case $target in
4413       *-*-aix*) conftest_s='    .machine "pwr5x"
4414         .csect .text[[PR]]
4415         frin 1,1';;
4416       *) conftest_s='   .machine power5
4417         .text
4418         frin 1,1';;
4419     esac
4420
4421     gcc_GAS_CHECK_FEATURE([fp round support],
4422       gcc_cv_as_powerpc_fprnd, [2,17,0],,
4423       [$conftest_s],,
4424       [AC_DEFINE(HAVE_AS_FPRND, 1,
4425           [Define if your assembler supports fprnd.])])
4426
4427     case $target in
4428       *-*-aix*) conftest_s='    .machine "pwr6"
4429         .csect .text[[PR]]
4430         mffgpr 1,3';;
4431       *) conftest_s='   .machine power6
4432         .text
4433         mffgpr 1,3';;
4434     esac
4435
4436     gcc_GAS_CHECK_FEATURE([move fp gpr support],
4437       gcc_cv_as_powerpc_mfpgpr, [2,19,2],,
4438       [$conftest_s],,
4439       [AC_DEFINE(HAVE_AS_MFPGPR, 1,
4440           [Define if your assembler supports mffgpr and mftgpr.])])
4441
4442     case $target in
4443       *-*-aix*) conftest_s='    .csect .text[[PR]]
4444 LCF..0:
4445         addis 11,30,_GLOBAL_OFFSET_TABLE_-LCF..0@ha';;
4446       *-*-darwin*)
4447         conftest_s='    .text
4448 LCF0:
4449         addis r11,r30,_GLOBAL_OFFSET_TABLE_-LCF0@ha';;
4450       *) conftest_s='   .text
4451 .LCF0:
4452         addis 11,30,_GLOBAL_OFFSET_TABLE_-.LCF0@ha';;
4453     esac
4454
4455     gcc_GAS_CHECK_FEATURE([rel16 relocs],
4456       gcc_cv_as_powerpc_rel16, [2,17,0], -a32,
4457       [$conftest_s],,
4458       [AC_DEFINE(HAVE_AS_REL16, 1,
4459           [Define if your assembler supports R_PPC_REL16 relocs.])])
4460
4461     case $target in
4462       *-*-aix*) conftest_s='    .machine "pwr6"
4463         .csect .text[[PR]]
4464         cmpb 3,4,5';;
4465       *) conftest_s='   .machine power6
4466         .text
4467         cmpb 3,4,5';;
4468     esac
4469
4470     gcc_GAS_CHECK_FEATURE([compare bytes support],
4471       gcc_cv_as_powerpc_cmpb, [2,19,2], -a32,
4472       [$conftest_s],,
4473       [AC_DEFINE(HAVE_AS_CMPB, 1,
4474           [Define if your assembler supports cmpb.])])
4475
4476     case $target in
4477       *-*-aix*) conftest_s='    .machine "pwr6"
4478         .csect .text[[PR]]
4479         dadd 1,2,3';;
4480       *) conftest_s='   .machine power6
4481         .text
4482         dadd 1,2,3';;
4483     esac
4484
4485     gcc_GAS_CHECK_FEATURE([decimal float support],
4486       gcc_cv_as_powerpc_dfp, [2,19,2], -a32,
4487       [$conftest_s],,
4488       [AC_DEFINE(HAVE_AS_DFP, 1,
4489           [Define if your assembler supports DFP instructions.])])
4490
4491     case $target in
4492       *-*-aix*) conftest_s='    .machine "pwr7"
4493         .csect .text[[PR]]
4494         lxvd2x 1,2,3';;
4495       *) conftest_s='   .machine power7
4496         .text
4497         lxvd2x 1,2,3';;
4498     esac
4499
4500     gcc_GAS_CHECK_FEATURE([vector-scalar support],
4501       gcc_cv_as_powerpc_vsx, [2,19,2], -a32,
4502       [$conftest_s],,
4503       [AC_DEFINE(HAVE_AS_VSX, 1,
4504           [Define if your assembler supports VSX instructions.])])
4505
4506     case $target in
4507       *-*-aix*) conftest_s='    .machine "pwr7"
4508         .csect .text[[PR]]
4509         popcntd 3,3';;
4510       *) conftest_s='   .machine power7
4511         .text
4512         popcntd 3,3';;
4513     esac
4514
4515     gcc_GAS_CHECK_FEATURE([popcntd support],
4516       gcc_cv_as_powerpc_popcntd, [2,19,2], -a32,
4517       [$conftest_s],,
4518       [AC_DEFINE(HAVE_AS_POPCNTD, 1,
4519           [Define if your assembler supports POPCNTD instructions.])])
4520
4521     case $target in
4522       *-*-aix*) conftest_s='    .machine "pwr8"
4523         .csect .text[[PR]]';;
4524       *) conftest_s='   .machine power8
4525         .text';;
4526     esac
4527
4528     gcc_GAS_CHECK_FEATURE([power8 support],
4529       gcc_cv_as_powerpc_power8, [2,19,2], -a32,
4530       [$conftest_s],,
4531       [AC_DEFINE(HAVE_AS_POWER8, 1,
4532           [Define if your assembler supports POWER8 instructions.])])
4533
4534     case $target in
4535       *-*-aix*) conftest_s='    .machine "pwr9"
4536         .csect .text[[PR]]';;
4537       *) conftest_s='   .machine power9
4538         .text';;
4539     esac
4540
4541     gcc_GAS_CHECK_FEATURE([power9 support],
4542       gcc_cv_as_powerpc_power9, [2,19,2], -a32,
4543       [$conftest_s],,
4544       [AC_DEFINE(HAVE_AS_POWER9, 1,
4545           [Define if your assembler supports POWER9 instructions.])])
4546
4547     case $target in
4548       *-*-aix*) conftest_s='    .csect .text[[PR]]
4549         lwsync';;
4550       *) conftest_s='   .text
4551         lwsync';;
4552     esac
4553
4554     gcc_GAS_CHECK_FEATURE([lwsync support],
4555       gcc_cv_as_powerpc_lwsync, [2,19,2], -a32,
4556       [$conftest_s],,
4557       [AC_DEFINE(HAVE_AS_LWSYNC, 1,
4558           [Define if your assembler supports LWSYNC instructions.])])
4559
4560     case $target in
4561       *-*-aix*) conftest_s='    .machine "476"
4562         .csect .text[[PR]]
4563         dci 0';;
4564       *) conftest_s='   .machine "476"
4565         .text
4566         dci 0';;
4567     esac
4568
4569     gcc_GAS_CHECK_FEATURE([data cache invalidate support],
4570       gcc_cv_as_powerpc_dci, [9,99,0], -a32,
4571       [$conftest_s],,
4572       [AC_DEFINE(HAVE_AS_DCI, 1,
4573           [Define if your assembler supports the DCI/ICI instructions.])])
4574
4575     gcc_GAS_CHECK_FEATURE([.gnu_attribute support],
4576       gcc_cv_as_powerpc_gnu_attribute, [2,18,0],,
4577       [.gnu_attribute 4,1],,
4578       [AC_DEFINE(HAVE_AS_GNU_ATTRIBUTE, 1,
4579           [Define if your assembler supports .gnu_attribute.])])
4580
4581     gcc_GAS_CHECK_FEATURE([tls marker support],
4582       gcc_cv_as_powerpc_tls_markers, [2,20,0],,
4583       [ bl __tls_get_addr(x@tlsgd)],,
4584       [AC_DEFINE(HAVE_AS_TLS_MARKERS, 1,
4585           [Define if your assembler supports arg info for __tls_get_addr.])])
4586
4587     gcc_GAS_CHECK_FEATURE([prologue entry point marker support],
4588       gcc_cv_as_powerpc_entry_markers, [2,26,0],-a64 --fatal-warnings,
4589       [ .reloc .,R_PPC64_ENTRY; nop],,
4590       [AC_DEFINE(HAVE_AS_ENTRY_MARKERS, 1,
4591           [Define if your assembler supports the R_PPC64_ENTRY relocation.])])
4592
4593     case $target in
4594       *-*-aix*)
4595         gcc_GAS_CHECK_FEATURE([AIX .ref support],
4596           gcc_cv_as_aix_ref, [2,21,0],,
4597           [     .csect stuff[[rw]]
4598              stuff:
4599                 .long 1
4600                 .extern sym
4601                 .ref sym
4602           ],,
4603           [AC_DEFINE(HAVE_AS_REF, 1,
4604             [Define if your assembler supports .ref])])
4605
4606         gcc_GAS_CHECK_FEATURE([AIX DWARF location lists section support],
4607           gcc_cv_as_aix_dwloc, [2,21,0],,
4608           [     .dwsect 0xA0000
4609         Lframe..0:
4610                 .vbyte 4,Lframe..0
4611           ],,
4612           [AC_DEFINE(HAVE_XCOFF_DWARF_EXTRAS, 1,
4613             [Define if your assembler supports AIX debug frame section label reference.])])
4614         ;;
4615     esac
4616     ;;
4617
4618   mips*-*-*)
4619     gcc_GAS_CHECK_FEATURE([explicit relocation support],
4620       gcc_cv_as_mips_explicit_relocs, [2,14,0],,
4621 [       lw $4,%gp_rel(foo)($4)],,
4622       [if test x$target_cpu_default = x
4623        then target_cpu_default=MASK_EXPLICIT_RELOCS
4624        else target_cpu_default="($target_cpu_default)|MASK_EXPLICIT_RELOCS"
4625        fi])
4626
4627     gcc_GAS_CHECK_FEATURE([-mno-shared support],
4628       gcc_cv_as_mips_no_shared, [2,16,0], [-mno-shared], [nop],,
4629       [AC_DEFINE(HAVE_AS_NO_SHARED, 1,
4630                  [Define if the assembler understands -mno-shared.])])
4631
4632     gcc_GAS_CHECK_FEATURE([.gnu_attribute support],
4633       gcc_cv_as_mips_gnu_attribute, [2,18,0],,
4634       [.gnu_attribute 4,1],,
4635       [AC_DEFINE(HAVE_AS_GNU_ATTRIBUTE, 1,
4636           [Define if your assembler supports .gnu_attribute.])])
4637
4638     gcc_GAS_CHECK_FEATURE([.module support],
4639       gcc_cv_as_mips_dot_module,,[-32],
4640       [.module mips2
4641        .module fp=xx],,
4642       [AC_DEFINE(HAVE_AS_DOT_MODULE, 1,
4643           [Define if your assembler supports .module.])])
4644     if test x$gcc_cv_as_mips_dot_module = xno \
4645        && test x$with_fp_32 != x; then
4646       AC_MSG_ERROR(
4647         [Requesting --with-fp-32= requires assembler support for .module.])
4648     fi
4649
4650     gcc_GAS_CHECK_FEATURE([.micromips support],
4651       gcc_cv_as_micromips_support,,[--fatal-warnings],
4652       [.set micromips],,
4653       [AC_DEFINE(HAVE_GAS_MICROMIPS, 1,
4654           [Define if your assembler supports the .set micromips directive])])
4655
4656     gcc_GAS_CHECK_FEATURE([.dtprelword support],
4657       gcc_cv_as_mips_dtprelword, [2,18,0],,
4658       [.section .tdata,"awT",@progbits
4659 x:
4660         .word 2
4661         .text
4662         .dtprelword x+0x8000],,
4663       [AC_DEFINE(HAVE_AS_DTPRELWORD, 1,
4664           [Define if your assembler supports .dtprelword.])])
4665
4666     gcc_GAS_CHECK_FEATURE([DSPR1 mult with four accumulators support],
4667       gcc_cv_as_mips_dspr1_mult,,,
4668 [       .set    mips32r2
4669         .set    nodspr2
4670         .set    dsp
4671         madd    $ac3,$4,$5
4672         maddu   $ac3,$4,$5
4673         msub    $ac3,$4,$5
4674         msubu   $ac3,$4,$5
4675         mult    $ac3,$4,$5
4676         multu   $ac3,$4,$5],,
4677       [AC_DEFINE(HAVE_AS_DSPR1_MULT, 1,
4678           [Define if your assembler supports DSPR1 mult.])])
4679
4680     AC_MSG_CHECKING(assembler and linker for explicit JALR relocation)
4681     gcc_cv_as_ld_jalr_reloc=no
4682     if test $gcc_cv_as_mips_explicit_relocs = yes; then
4683       if test $in_tree_ld = yes ; then
4684         if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 20 -o "$gcc_cv_gld_major_version" -gt 2 \
4685            && test $in_tree_ld_is_elf = yes; then
4686           gcc_cv_as_ld_jalr_reloc=yes
4687         fi
4688       elif test x$gcc_cv_as != x -a x$gcc_cv_ld != x -a x$gcc_cv_objdump != x; then
4689         echo '  .ent x' > conftest.s
4690         echo 'x:        lw $2,%got_disp(y)($3)' >> conftest.s
4691         echo '  lw $25,%call16(y)($28)' >> conftest.s
4692         echo '  .reloc  1f,R_MIPS_JALR,y' >> conftest.s
4693         echo '1:        jalr $25' >> conftest.s
4694         echo '  .reloc  1f,R_MIPS_JALR,x' >> conftest.s
4695         echo '1:        jalr $25' >> conftest.s
4696         echo '  .end x' >> conftest.s
4697         if $gcc_cv_as -o conftest.o conftest.s >/dev/null 2>&AS_MESSAGE_LOG_FD \
4698            && $gcc_cv_ld -shared -o conftest.so conftest.o >/dev/null 2>&AS_MESSAGE_LOG_FD; then
4699           if $gcc_cv_objdump -d conftest.so | grep jalr >/dev/null 2>&1 \
4700              && $gcc_cv_objdump -d conftest.so | grep "bal.*<x>" >/dev/null 2>&1; then
4701             gcc_cv_as_ld_jalr_reloc=yes
4702           fi
4703         fi
4704         rm -f conftest.*
4705       fi
4706     fi
4707     if test $gcc_cv_as_ld_jalr_reloc = yes; then
4708       if test x$target_cpu_default = x; then
4709         target_cpu_default=MASK_RELAX_PIC_CALLS
4710       else
4711         target_cpu_default="($target_cpu_default)|MASK_RELAX_PIC_CALLS"
4712       fi
4713     fi
4714     AC_MSG_RESULT($gcc_cv_as_ld_jalr_reloc)
4715
4716     AC_CACHE_CHECK([linker for .eh_frame personality relaxation],
4717       [gcc_cv_ld_mips_personality_relaxation],
4718       [gcc_cv_ld_mips_personality_relaxation=no
4719        if test $in_tree_ld = yes ; then
4720          if test "$gcc_cv_gld_major_version" -eq 2 \
4721                  -a "$gcc_cv_gld_minor_version" -ge 21 \
4722                  -o "$gcc_cv_gld_major_version" -gt 2; then
4723            gcc_cv_ld_mips_personality_relaxation=yes
4724          fi
4725        elif test x$gcc_cv_as != x \
4726                  -a x$gcc_cv_ld != x \
4727                  -a x$gcc_cv_readelf != x ; then
4728          cat > conftest.s <<EOF
4729         .cfi_startproc
4730         .cfi_personality 0x80,indirect_ptr
4731         .ent test
4732 test:
4733         nop
4734         .end test
4735         .cfi_endproc
4736
4737         .section .data,"aw",@progbits
4738 indirect_ptr:
4739         .dc.a personality
4740 EOF
4741          if $gcc_cv_as -KPIC -o conftest.o conftest.s > /dev/null 2>&1 \
4742             && $gcc_cv_ld -o conftest conftest.o -shared > /dev/null 2>&1; then
4743            if $gcc_cv_readelf -d conftest 2>&1 \
4744               | grep TEXTREL > /dev/null 2>&1; then
4745              :
4746            elif $gcc_cv_readelf --relocs conftest 2>&1 \
4747                 | grep 'R_MIPS_REL32 *$' > /dev/null 2>&1; then
4748              :
4749            else
4750              gcc_cv_ld_mips_personality_relaxation=yes
4751            fi
4752          fi
4753        fi
4754        rm -f conftest.s conftest.o conftest])
4755     if test x$gcc_cv_ld_mips_personality_relaxation = xyes; then
4756             AC_DEFINE(HAVE_LD_PERSONALITY_RELAXATION, 1,
4757       [Define if your linker can relax absolute .eh_frame personality
4758 pointers into PC-relative form.])
4759     fi
4760
4761     gcc_GAS_CHECK_FEATURE([-mnan= support],
4762       gcc_cv_as_mips_nan,,
4763       [-mnan=2008],,,
4764       [AC_DEFINE(HAVE_AS_NAN, 1,
4765                  [Define if the assembler understands -mnan=.])])
4766     if test x$gcc_cv_as_mips_nan = xno \
4767        && test x$with_nan != x; then
4768       AC_MSG_ERROR(
4769         [Requesting --with-nan= requires assembler support for -mnan=])
4770     fi
4771     ;;
4772     s390*-*-*)
4773     gcc_GAS_CHECK_FEATURE([.gnu_attribute support],
4774       gcc_cv_as_s390_gnu_attribute, [2,18,0],,
4775       [.gnu_attribute 8,1],,
4776       [AC_DEFINE(HAVE_AS_GNU_ATTRIBUTE, 1,
4777           [Define if your assembler supports .gnu_attribute.])])
4778     gcc_GAS_CHECK_FEATURE([.machine and .machinemode support],
4779       gcc_cv_as_s390_machine_machinemode, [2,24,0],,
4780       [ .machinemode push
4781         .machinemode pop
4782         .machine push
4783         .machine pop],,
4784       [AC_DEFINE(HAVE_AS_MACHINE_MACHINEMODE, 1,
4785           [Define if your assembler supports .machine and .machinemode.])])
4786     gcc_GAS_CHECK_FEATURE([architecture modifiers support],
4787       gcc_cv_as_s390_architecture_modifiers, [2,26,0],,
4788       [ .machine z13+vx ],,
4789       [AC_DEFINE(HAVE_AS_ARCHITECTURE_MODIFIERS, 1,
4790           [Define if your assembler supports architecture modifiers.])])
4791     ;;
4792 esac
4793
4794 # Mips and HP-UX need the GNU assembler.
4795 # Linux on IA64 might be able to use the Intel assembler.
4796
4797 case "$target" in
4798   mips*-*-* | *-*-hpux* )
4799     if test x$gas_flag = xyes \
4800        || test x"$host" != x"$build" \
4801        || test ! -x "$gcc_cv_as" \
4802        || "$gcc_cv_as" -v < /dev/null 2>&1 | grep GNU > /dev/null; then
4803       :
4804     else
4805       echo "*** This configuration requires the GNU assembler" >&2
4806       exit 1
4807     fi
4808     ;;
4809 esac
4810
4811 # ??? Not all targets support dwarf2 debug_line, even within a version
4812 # of gas.  Moreover, we need to emit a valid instruction to trigger any
4813 # info to the output file.  So, as supported targets are added to gas 2.11,
4814 # add some instruction here to (also) show we expect this might work.
4815 # ??? Once 2.11 is released, probably need to add first known working
4816 # version to the per-target configury.
4817 case "$cpu_type" in
4818   aarch64 | alpha | arc | arm | avr | bfin | cris | i386 | m32c | m68k \
4819   | microblaze | mips | nios2 | pa | riscv | rs6000 | score | sparc | spu \
4820   | tilegx | tilepro | visium | xstormy16 | xtensa)
4821     insn="nop"
4822     ;;
4823   ia64 | s390)
4824     insn="nop 0"
4825     ;;
4826   mmix)
4827     insn="swym 0"
4828     ;;
4829 esac
4830 if test x"$insn" != x; then
4831  conftest_s="\
4832         .file 1 \"conftest.s\"
4833         .loc 1 3 0
4834         $insn"
4835  gcc_GAS_CHECK_FEATURE([dwarf2 debug_line support],
4836   gcc_cv_as_dwarf2_debug_line,
4837   [elf,2,11,0],, [$conftest_s],
4838   [if test x$gcc_cv_objdump != x \
4839    && $gcc_cv_objdump -h conftest.o 2> /dev/null \
4840       | grep debug_line > /dev/null 2>&1; then
4841      gcc_cv_as_dwarf2_debug_line=yes
4842    fi])
4843
4844 # The .debug_line file table must be in the exact order that
4845 # we specified the files, since these indices are also used
4846 # by DW_AT_decl_file.  Approximate this test by testing if
4847 # the assembler bitches if the same index is assigned twice.
4848  gcc_GAS_CHECK_FEATURE([buggy dwarf2 .file directive],
4849   gcc_cv_as_dwarf2_file_buggy,,,
4850 [       .file 1 "foo.s"
4851         .file 1 "bar.s"])
4852
4853  if test $gcc_cv_as_dwarf2_debug_line = yes \
4854  && test $gcc_cv_as_dwarf2_file_buggy = no; then
4855         AC_DEFINE(HAVE_AS_DWARF2_DEBUG_LINE, 1,
4856   [Define if your assembler supports dwarf2 .file/.loc directives,
4857    and preserves file table indices exactly as given.])
4858  fi
4859
4860  gcc_GAS_CHECK_FEATURE([--gdwarf2 option],
4861   gcc_cv_as_gdwarf2_flag,
4862   [elf,2,11,0], [--gdwarf2], [$insn],,
4863   [AC_DEFINE(HAVE_AS_GDWARF2_DEBUG_FLAG, 1,
4864 [Define if your assembler supports the --gdwarf2 option.])])
4865
4866  gcc_GAS_CHECK_FEATURE([--gstabs option],
4867   gcc_cv_as_gstabs_flag,
4868   [elf,2,11,0], [--gstabs], [$insn],,
4869   [AC_DEFINE(HAVE_AS_GSTABS_DEBUG_FLAG, 1,
4870 [Define if your assembler supports the --gstabs option.])])
4871
4872  gcc_GAS_CHECK_FEATURE([--debug-prefix-map option],
4873   gcc_cv_as_debug_prefix_map_flag,
4874   [2,18,0], [--debug-prefix-map /a=/b], [$insn],,
4875   [AC_DEFINE(HAVE_AS_DEBUG_PREFIX_MAP, 1,
4876 [Define if your assembler supports the --debug-prefix-map option.])])
4877 fi
4878
4879 gcc_GAS_CHECK_FEATURE([compressed debug sections],
4880   gcc_cv_as_compress_debug,,,,
4881   [# gas compiled without zlib cannot compress debug sections and warns
4882    # about it, but still exits successfully.  So check for this, too.
4883    if $gcc_cv_as --compress-debug-sections -o conftest.o conftest.s 2>&1 | grep -i warning > /dev/null
4884    then
4885      gcc_cv_as_compress_debug=0
4886    # Since binutils 2.26, gas supports --compress-debug-sections=type,
4887    # defaulting to the ELF gABI format.
4888    elif $gcc_cv_as --compress-debug-sections=zlib-gnu -o conftest.o conftest.s > /dev/null 2>&1
4889    then
4890      gcc_cv_as_compress_debug=2
4891      gcc_cv_as_compress_debug_option="--compress-debug-sections"
4892      gcc_cv_as_no_compress_debug_option="--nocompress-debug-sections"
4893    # Before binutils 2.26, gas only supported --compress-debug-options and
4894    # emitted the traditional GNU format.
4895    elif $gcc_cv_as --compress-debug-sections -o conftest.o conftest.s > /dev/null 2>&1
4896    then
4897      gcc_cv_as_compress_debug=1
4898      gcc_cv_as_compress_debug_option="--compress-debug-sections"
4899      gcc_cv_as_no_compress_debug_option="--nocompress-debug-sections"
4900    else
4901      gcc_cv_as_compress_debug=0
4902    fi])
4903 AC_DEFINE_UNQUOTED(HAVE_AS_COMPRESS_DEBUG, $gcc_cv_as_compress_debug,
4904 [Define to the level of your assembler's compressed debug section support.])
4905 AC_DEFINE_UNQUOTED(AS_COMPRESS_DEBUG_OPTION, "$gcc_cv_as_compress_debug_option",
4906 [Define to the assembler option to enable compressed debug sections.])
4907 AC_DEFINE_UNQUOTED(AS_NO_COMPRESS_DEBUG_OPTION, "$gcc_cv_as_no_compress_debug_option",
4908 [Define to the assembler option to disable compressed debug sections.])
4909
4910 gcc_GAS_CHECK_FEATURE([.lcomm with alignment], gcc_cv_as_lcomm_with_alignment,
4911  ,,
4912 [.lcomm bar,4,16],,
4913 [AC_DEFINE(HAVE_GAS_LCOMM_WITH_ALIGNMENT, 1,
4914   [Define if your assembler supports .lcomm with an alignment field.])])
4915
4916 if test x$with_sysroot = x && test x$host = x$target \
4917    && test "$prefix" != "/usr" && test "x$prefix" != "x$local_prefix" \
4918    && test "$prefix" != "NONE"; then
4919   AC_DEFINE_UNQUOTED(PREFIX_INCLUDE_DIR, "$prefix/include",
4920 [Define to PREFIX/include if cpp should also search that directory.])
4921 fi
4922
4923 # Determine the version of glibc, if any, used on the target.
4924 AC_MSG_CHECKING([for target glibc version])
4925 AC_ARG_WITH([glibc-version],
4926   [AS_HELP_STRING([--with-glibc-version=M.N],
4927     [assume GCC used with glibc version M.N or later])], [
4928 if [echo "$with_glibc_version" | grep '^[0-9][0-9]*\.[0-9][0-9]*$']; then
4929   glibc_version_major=`echo "$with_glibc_version" | sed -e 's/\..*//'`
4930   glibc_version_minor=`echo "$with_glibc_version" | sed -e 's/.*\.//'`
4931 else
4932   AC_MSG_ERROR([option --with-glibc-version requires a version number M.N])
4933 fi], [
4934 glibc_version_major=0
4935 glibc_version_minor=0
4936 [if test -f $target_header_dir/features.h \
4937   && glibc_version_major_define=`$EGREP '^[     ]*#[    ]*define[       ]+__GLIBC__[    ]+[0-9]' $target_header_dir/features.h` \
4938   && glibc_version_minor_define=`$EGREP '^[     ]*#[    ]*define[       ]+__GLIBC_MINOR__[      ]+[0-9]' $target_header_dir/features.h`; then
4939   glibc_version_major=`echo "$glibc_version_major_define" | sed -e 's/.*__GLIBC__[      ]*//'`
4940   glibc_version_minor=`echo "$glibc_version_minor_define" | sed -e 's/.*__GLIBC_MINOR__[        ]*//'`
4941 fi]])
4942 AC_MSG_RESULT([$glibc_version_major.$glibc_version_minor])
4943 AC_DEFINE_UNQUOTED([TARGET_GLIBC_MAJOR], [$glibc_version_major],
4944 [GNU C Library major version number used on the target, or 0.])
4945 AC_DEFINE_UNQUOTED([TARGET_GLIBC_MINOR], [$glibc_version_minor],
4946 [GNU C Library minor version number used on the target, or 0.])
4947
4948 AC_ARG_ENABLE(gnu-unique-object,
4949  [AS_HELP_STRING([--enable-gnu-unique-object],
4950    [enable the use of the @gnu_unique_object ELF extension on glibc systems])],
4951  [case $enable_gnu_unique_object in
4952     yes | no) ;;
4953     *) AC_MSG_ERROR(['$enable_gnu_unique_object' is an invalid value for --enable-gnu-unique-object.
4954 Valid choices are 'yes' and 'no'.]) ;;
4955   esac],
4956  [gcc_GAS_CHECK_FEATURE([gnu_unique_object], gcc_cv_as_gnu_unique_object,
4957    [elf,2,19,52],,
4958    [.type foo, '$target_type_format_char'gnu_unique_object],,
4959 # We need to unquote above to to use the definition from config.gcc.
4960 # Also check for ld.so support, i.e. glibc 2.11 or higher.
4961    [GCC_GLIBC_VERSION_GTE_IFELSE([2], [11], [enable_gnu_unique_object=yes], )]
4962    )])
4963 if test x$enable_gnu_unique_object = xyes; then
4964   AC_DEFINE(HAVE_GAS_GNU_UNIQUE_OBJECT, 1,
4965    [Define if your assembler supports @gnu_unique_object.])
4966 fi
4967
4968 AC_CACHE_CHECK([assembler for tolerance to line number 0],
4969  [gcc_cv_as_line_zero],
4970  [gcc_cv_as_line_zero=no
4971   if test $in_tree_gas = yes; then
4972     gcc_GAS_VERSION_GTE_IFELSE(2, 16, 91, [gcc_cv_as_line_zero=yes])
4973   elif test "x$gcc_cv_as" != x; then
4974     { echo '# 1 "test.s" 1'; echo '# 0 "" 2'; } > conftest.s
4975     if AC_TRY_COMMAND([$gcc_cv_as -o conftest.o conftest.s >&AS_MESSAGE_LOG_FD 2>conftest.out]) &&
4976        test "x`cat conftest.out`" = x
4977     then
4978       gcc_cv_as_line_zero=yes
4979     else
4980       echo "configure: failed program was" >&AS_MESSAGE_LOG_FD
4981       cat conftest.s >&AS_MESSAGE_LOG_FD
4982       echo "configure: error output was" >&AS_MESSAGE_LOG_FD
4983       cat conftest.out >&AS_MESSAGE_LOG_FD
4984     fi
4985     rm -f conftest.o conftest.s conftest.out
4986   fi])
4987 if test "x$gcc_cv_as_line_zero" = xyes; then
4988   AC_DEFINE([HAVE_AS_LINE_ZERO], 1,
4989 [Define if the assembler won't complain about a line such as # 0 "" 2.])
4990 fi
4991
4992 AC_MSG_CHECKING(support for thin archives)
4993 thin_archive_support=no
4994 echo 'int main (void) { return 0; }' > conftest.c
4995 if ($AR --version | sed 1q | grep "GNU ar" \
4996     && $CC $CFLAGS -c conftest.c \
4997     && $AR rcT conftest.a conftest.o \
4998     && $CC $CFLAGS $LDFLAGS -o conftest conftest.a) >/dev/null 2>&1; then
4999   thin_archive_support=yes
5000 fi
5001 rm -f conftest.c conftest.o conftest.a conftest
5002 AC_MSG_RESULT($thin_archive_support)
5003 AC_SUBST(thin_archive_support)
5004
5005 AC_MSG_CHECKING(linker PT_GNU_EH_FRAME support)
5006 gcc_cv_ld_eh_frame_hdr=no
5007 if test $in_tree_ld = yes ; then
5008   if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 12 -o "$gcc_cv_gld_major_version" -gt 2 \
5009      && test $in_tree_ld_is_elf = yes; then
5010     gcc_cv_ld_eh_frame_hdr=yes
5011   fi
5012 elif test x$gcc_cv_ld != x; then
5013   if echo "$ld_ver" | grep GNU > /dev/null; then
5014     # Check if linker supports --eh-frame-hdr option
5015     if $gcc_cv_ld --help 2>&1 | grep eh-frame-hdr > /dev/null; then
5016       gcc_cv_ld_eh_frame_hdr=yes
5017     fi
5018   else
5019     case "$target" in
5020       *-*-solaris2*)
5021         # Sun ld has various bugs in .eh_frame_hdr support before version 1.2251.
5022         if test "$ld_vers_major" -gt 1 || test "$ld_vers_minor" -ge 2251; then
5023           gcc_cv_ld_eh_frame_hdr=yes
5024         fi
5025         ;;
5026     esac
5027   fi
5028 fi
5029 GCC_TARGET_TEMPLATE([HAVE_LD_EH_FRAME_HDR])
5030 if test x"$gcc_cv_ld_eh_frame_hdr" = xyes; then
5031         AC_DEFINE(HAVE_LD_EH_FRAME_HDR, 1,
5032 [Define if your linker supports .eh_frame_hdr.])
5033 fi
5034 AC_MSG_RESULT($gcc_cv_ld_eh_frame_hdr)
5035
5036 AC_MSG_CHECKING(linker CIEv3 in .eh_frame support)
5037 gcc_cv_ld_eh_frame_ciev3=no
5038 if test $in_tree_ld = yes ; then
5039   if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 16 -o "$gcc_cv_gld_major_version" -gt 2 \
5040      && test $in_tree_ld_is_elf = yes; then
5041     gcc_cv_ld_eh_frame_ciev3=yes
5042   fi
5043 elif test x$gcc_cv_ld != x; then
5044   if echo "$ld_ver" | grep GNU > /dev/null; then
5045     gcc_cv_ld_eh_frame_ciev3=yes
5046     if test 0"$ld_date" -lt 20040513; then
5047       if test -n "$ld_date"; then
5048         # If there was date string, but was earlier than 2004-05-13, fail
5049         gcc_cv_ld_eh_frame_ciev3=no
5050       elif test "$ld_vers_major" -lt 2; then
5051         gcc_cv_ld_eh_frame_ciev3=no
5052       elif test "$ld_vers_major" -eq 2 -a "$ld_vers_minor" -lt 16; then
5053         gcc_cv_ld_eh_frame_ciev3=no
5054       fi
5055     fi
5056   else
5057     case "$target" in
5058       *-*-solaris2*)
5059         # Sun ld added support for CIE v3 in .eh_frame in Solaris 11.1.
5060         if test "$ld_vers_major" -gt 1 || test "$ld_vers_minor" -ge 2324; then
5061           gcc_cv_ld_eh_frame_ciev3=yes
5062         fi
5063         ;;
5064     esac
5065   fi
5066 fi
5067 AC_DEFINE_UNQUOTED(HAVE_LD_EH_FRAME_CIEV3,
5068   [`if test x"$gcc_cv_ld_eh_frame_ciev3" = xyes; then echo 1; else echo 0; fi`],
5069   [Define 0/1 if your linker supports CIE v3 in .eh_frame.])
5070 AC_MSG_RESULT($gcc_cv_ld_eh_frame_ciev3)
5071
5072 AC_MSG_CHECKING(linker position independent executable support)
5073 gcc_cv_ld_pie=no
5074 if test $in_tree_ld = yes ; then
5075   case "$target" in
5076     # Full PIE support on Solaris was only introduced in gld 2.26.
5077     *-*-solaris2*)  gcc_gld_pie_min_version=26 ;;
5078     *)              gcc_gld_pie_min_version=15 ;;
5079   esac
5080   if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge "$gcc_gld_pie_min_version" -o "$gcc_cv_gld_major_version" -gt 2 \
5081      && test $in_tree_ld_is_elf = yes; then
5082     gcc_cv_ld_pie=yes
5083   fi
5084 elif test x$gcc_cv_ld != x; then
5085   # Check if linker supports -pie option
5086   if $gcc_cv_ld --help 2>&1 | grep -- -pie > /dev/null; then
5087     gcc_cv_ld_pie=yes
5088     case "$target" in
5089       *-*-solaris2*)
5090         if echo "$ld_ver" | grep GNU > /dev/null \
5091           && test "$ld_vers_major" -eq 2 -a "$ld_vers_minor" -lt 26; then
5092           gcc_cv_ld_pie=no
5093         fi
5094         ;;
5095     esac
5096   else
5097     case "$target" in
5098       *-*-solaris2.1[[1-9]]*)
5099         # Solaris 11.x and Solaris 12 added PIE support.
5100         if $gcc_cv_ld -z help 2>&1 | grep -- type.*pie > /dev/null; then
5101           gcc_cv_ld_pie=yes
5102         fi
5103         ;;
5104     esac
5105   fi
5106 fi
5107 if test x"$gcc_cv_ld_pie" = xyes; then
5108         AC_DEFINE(HAVE_LD_PIE, 1,
5109 [Define if your linker supports PIE option.])
5110 fi
5111 AC_MSG_RESULT($gcc_cv_ld_pie)
5112
5113 AC_MSG_CHECKING(linker PIE support with copy reloc)
5114 gcc_cv_ld_pie_copyreloc=no
5115 if test $gcc_cv_ld_pie = yes ; then
5116   if test $in_tree_ld = yes ; then
5117     if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 25 -o "$gcc_cv_gld_major_version" -gt 2; then
5118       gcc_cv_ld_pie_copyreloc=yes
5119     fi
5120   elif test x$gcc_cv_as != x -a x$gcc_cv_ld != x ; then
5121     # Check if linker supports -pie option with copy reloc
5122     case "$target" in
5123     i?86-*-linux* | x86_64-*-linux*)
5124       cat > conftest1.s <<EOF
5125         .globl  a_glob
5126         .data
5127         .type   a_glob, @object
5128         .size   a_glob, 4
5129 a_glob:
5130         .long   2
5131 EOF
5132       cat > conftest2.s <<EOF
5133         .text
5134         .globl  main
5135         .type   main, @function
5136 main:
5137         movl    %eax, a_glob(%rip)
5138         .size   main, .-main
5139         .globl  ptr
5140         .section        .data.rel,"aw",@progbits
5141         .type   ptr, @object
5142 ptr:
5143         .quad   a_glob
5144 EOF
5145       if $gcc_cv_as --64 -o conftest1.o conftest1.s > /dev/null 2>&1 \
5146          && $gcc_cv_ld -shared -melf_x86_64 -o conftest1.so conftest1.o > /dev/null 2>&1 \
5147          && $gcc_cv_as --64 -o conftest2.o conftest2.s > /dev/null 2>&1 \
5148          && $gcc_cv_ld -pie -melf_x86_64 -o conftest conftest2.o conftest1.so > /dev/null 2>&1; then
5149         gcc_cv_ld_pie_copyreloc=yes
5150       fi
5151       rm -f conftest conftest1.so conftest1.o conftest2.o conftest1.s conftest2.s
5152       ;;
5153     esac
5154   fi
5155 fi
5156 AC_DEFINE_UNQUOTED(HAVE_LD_PIE_COPYRELOC,
5157   [`if test x"$gcc_cv_ld_pie_copyreloc" = xyes; then echo 1; else echo 0; fi`],
5158   [Define 0/1 if your linker supports -pie option with copy reloc.])
5159 AC_MSG_RESULT($gcc_cv_ld_pie_copyreloc)
5160
5161 AC_MSG_CHECKING(linker EH-compatible garbage collection of sections)
5162 gcc_cv_ld_eh_gc_sections=no
5163 if test $in_tree_ld = yes ; then
5164   if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 17 -o "$gcc_cv_gld_major_version" -gt 2 \
5165      && test $in_tree_ld_is_elf = yes; then
5166     gcc_cv_ld_eh_gc_sections=yes
5167   fi
5168 elif test x$gcc_cv_as != x -a x$gcc_cv_ld != x -a x$gcc_cv_objdump != x ; then
5169   cat > conftest.s <<EOF
5170         .section        .text
5171 .globl _start
5172         .type _start, @function
5173 _start:
5174         .long foo
5175         .size _start, .-_start
5176         .section        .text.foo,"ax",@progbits
5177         .type foo, @function
5178 foo:
5179         .long 0
5180         .size foo, .-foo
5181         .section        .gcc_except_table.foo,"a",@progbits
5182 .L0:
5183         .long 0
5184         .section        .eh_frame,"a",@progbits
5185         .long .L0
5186 EOF
5187   if $gcc_cv_as -o conftest.o conftest.s > /dev/null 2>&1; then
5188     if $gcc_cv_ld -o conftest conftest.o --entry=_start --gc-sections 2>&1 \
5189          | grep "gc-sections option ignored" > /dev/null; then
5190       gcc_cv_ld_eh_gc_sections=no
5191     elif $gcc_cv_objdump -h conftest 2> /dev/null \
5192          | grep gcc_except_table > /dev/null; then
5193       gcc_cv_ld_eh_gc_sections=yes
5194       # If no COMDAT groups, the compiler will emit .gnu.linkonce.t. sections.
5195       if test x$gcc_cv_as_comdat_group != xyes; then
5196         gcc_cv_ld_eh_gc_sections=no
5197         cat > conftest.s <<EOF
5198         .section        .text
5199 .globl _start
5200         .type _start, @function
5201 _start:
5202         .long foo
5203         .size _start, .-_start
5204         .section        .gnu.linkonce.t.foo,"ax",@progbits
5205         .type foo, @function
5206 foo:
5207         .long 0
5208         .size foo, .-foo
5209         .section        .gcc_except_table.foo,"a",@progbits
5210 .L0:
5211         .long 0
5212         .section        .eh_frame,"a",@progbits
5213         .long .L0
5214 EOF
5215         if $gcc_cv_as -o conftest.o conftest.s > /dev/null 2>&1; then
5216           if $gcc_cv_ld -o conftest conftest.o --entry=_start --gc-sections 2>&1 \
5217                | grep "gc-sections option ignored" > /dev/null; then
5218             gcc_cv_ld_eh_gc_sections=no
5219           elif $gcc_cv_objdump -h conftest 2> /dev/null \
5220                | grep gcc_except_table > /dev/null; then
5221             gcc_cv_ld_eh_gc_sections=yes
5222           fi
5223         fi
5224       fi
5225     fi
5226   fi
5227   rm -f conftest.s conftest.o conftest
5228 fi
5229 case "$target" in
5230   hppa*-*-linux*)
5231     # ??? This apparently exposes a binutils bug with PC-relative relocations.
5232     gcc_cv_ld_eh_gc_sections=no
5233     ;;
5234 esac
5235 if test x$gcc_cv_ld_eh_gc_sections = xyes; then
5236         AC_DEFINE(HAVE_LD_EH_GC_SECTIONS, 1,
5237   [Define if your linker supports garbage collection of
5238    sections in presence of EH frames.])
5239 fi
5240 AC_MSG_RESULT($gcc_cv_ld_eh_gc_sections)
5241
5242 AC_MSG_CHECKING(linker EH garbage collection of sections bug)
5243 gcc_cv_ld_eh_gc_sections_bug=no
5244 if test $in_tree_ld = yes ; then
5245   if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -lt 19 -o "$gcc_cv_gld_major_version" -lt 2 \
5246      && test $in_tree_ld_is_elf = yes; then
5247     gcc_cv_ld_eh_gc_sections_bug=yes
5248   fi
5249 elif test x$gcc_cv_as != x -a x$gcc_cv_ld != x -a x$gcc_cv_objdump != x -a x$gcc_cv_as_comdat_group = xyes; then
5250   gcc_cv_ld_eh_gc_sections_bug=yes
5251   cat > conftest.s <<EOF
5252         .section        .text
5253 .globl _start
5254         .type _start, @function
5255 _start:
5256         .long foo
5257         .size _start, .-_start
5258         .section        .text.startup.foo,"ax",@progbits
5259         .type foo, @function
5260 foo:
5261         .long 0
5262         .size foo, .-foo
5263         .section        .gcc_except_table.foo,"a",@progbits
5264 .L0:
5265         .long 0
5266         .section        .eh_frame,"a",@progbits
5267         .long .L0
5268 EOF
5269   if $gcc_cv_as -o conftest.o conftest.s > /dev/null 2>&1; then
5270     if $gcc_cv_ld -o conftest conftest.o --entry=_start --gc-sections 2>&1 \
5271          | grep "gc-sections option ignored" > /dev/null; then
5272       :
5273     elif $gcc_cv_objdump -h conftest 2> /dev/null \
5274          | grep gcc_except_table > /dev/null; then
5275       gcc_cv_ld_eh_gc_sections_bug=no
5276     fi
5277   fi
5278   rm -f conftest.s conftest.o conftest
5279 fi
5280 if test x$gcc_cv_ld_eh_gc_sections_bug = xyes; then
5281         AC_DEFINE(HAVE_LD_EH_GC_SECTIONS_BUG, 1,
5282   [Define if your linker has buggy garbage collection of
5283    sections support when .text.startup.foo like sections are used.])
5284 fi
5285 AC_MSG_RESULT($gcc_cv_ld_eh_gc_sections_bug)
5286
5287 AC_MSG_CHECKING(linker for compressed debug sections)
5288 # gold/gld support compressed debug sections since binutils 2.19/2.21
5289 # In binutils 2.26, gld gained support for the ELF gABI format.
5290 if test $in_tree_ld = yes ; then
5291   gcc_cv_ld_compress_debug=0
5292   if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 19 -o "$gcc_cv_gld_major_version" -gt 2 \
5293      && test $in_tree_ld_is_elf = yes && test $ld_is_gold = yes; then
5294     gcc_cv_ld_compress_debug=2
5295     gcc_cv_ld_compress_debug_option="--compress-debug-sections"
5296   elif test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 26 -o "$gcc_cv_gld_major_version" -gt 2 \
5297      && test $in_tree_ld_is_elf = yes && test $ld_is_gold = no; then
5298     gcc_cv_ld_compress_debug=3
5299     gcc_cv_ld_compress_debug_option="--compress-debug-sections"
5300   elif test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 21 -o "$gcc_cv_gld_major_version" -gt 2 \
5301      && test $in_tree_ld_is_elf = yes; then
5302     gcc_cv_ld_compress_debug=1
5303   fi
5304 elif echo "$ld_ver" | grep GNU > /dev/null; then
5305   if test "$ld_vers_major" -lt 2 \
5306      || test "$ld_vers_major" -eq 2 -a "$ld_vers_minor" -lt 21; then
5307     gcc_cv_ld_compress_debug=0
5308   elif test "$ld_vers_major" -eq 2 -a "$ld_vers_minor" -lt 26; then
5309     gcc_cv_ld_compress_debug=1
5310   else
5311     gcc_cv_ld_compress_debug=3
5312     gcc_cv_ld_compress_debug_option="--compress-debug-sections"
5313   fi
5314   if test $ld_is_gold = yes; then
5315     gcc_cv_ld_compress_debug=2
5316     gcc_cv_ld_compress_debug_option="--compress-debug-sections"
5317   fi
5318 else
5319 changequote(,)dnl
5320   case "${target}" in
5321     *-*-solaris2*)
5322       # Introduced in Solaris 11.2.
5323       if $gcc_cv_ld --help 2>&1 | grep -- '-z compress-sections' > /dev/null; then
5324         gcc_cv_ld_compress_debug=3
5325         gcc_cv_ld_compress_debug_option="-z compress-sections"
5326       else
5327         gcc_cv_ld_compress_debug=0
5328       fi
5329       ;;
5330     *)
5331       # Assume linkers other than GNU ld don't support compessed debug
5332       # sections.
5333       gcc_cv_ld_compress_debug=0
5334       ;;
5335   esac
5336 changequote([,])dnl
5337 fi
5338 AC_DEFINE_UNQUOTED(HAVE_LD_COMPRESS_DEBUG, $gcc_cv_ld_compress_debug,
5339 [Define to the level of your linker's compressed debug section support.])
5340 AC_DEFINE_UNQUOTED(LD_COMPRESS_DEBUG_OPTION, "$gcc_cv_ld_compress_debug_option",
5341 [Define to the linker option to enable compressed debug sections.])
5342 AC_MSG_RESULT($gcc_cv_ld_compress_debug)
5343
5344 if test x"$ld64_flag" = x"yes"; then
5345
5346   # Set defaults for possibly untestable items.
5347   gcc_cv_ld64_export_dynamic=0
5348
5349   if test "$build" = "$host"; then
5350     darwin_try_test=1
5351   else
5352     darwin_try_test=0
5353   fi
5354
5355   # On Darwin, because of FAT library support, it is often possible to execute
5356   # exes from compatible archs even when the host differs from the build system.
5357   case "$build","$host" in
5358     x86_64-*-darwin*,i?86-*-darwin* | powerpc64*-*-darwin*,powerpc*-*-darwin*)
5359         darwin_try_test=1;;
5360     *) ;;
5361   esac
5362
5363   # If the configurer specified a minimum ld64 version to be supported, then use
5364   # that to determine feature support.
5365   if test x"${gcc_cv_ld64_version}" != x; then
5366     AC_MSG_CHECKING(ld64 specified version)
5367     gcc_cv_ld64_major=`echo "$gcc_cv_ld64_version" | sed -e 's/\..*//'`
5368     AC_MSG_RESULT($gcc_cv_ld64_major)
5369    if test "$gcc_cv_ld64_major" -ge 236; then
5370       gcc_cv_ld64_export_dynamic=1
5371     fi
5372   elif test -x "$gcc_cv_ld" -a "$darwin_try_test" -eq 1; then
5373     # If the version was not specified, try to find it.
5374     AC_MSG_CHECKING(linker version)
5375     if test x"${gcc_cv_ld64_version}" = x; then
5376       gcc_cv_ld64_version=`$gcc_cv_ld -v 2>&1 | grep ld64 | sed s/.*ld64-// | awk '{print $1}'`
5377     fi
5378     AC_MSG_RESULT($gcc_cv_ld64_version)
5379
5380     AC_MSG_CHECKING(linker for -export_dynamic support)
5381     gcc_cv_ld64_export_dynamic=1
5382     if $gcc_cv_ld -export_dynamic < /dev/null 2>&1 | grep 'unknown option' > /dev/null; then
5383       gcc_cv_ld64_export_dynamic=0
5384     fi
5385     AC_MSG_RESULT($gcc_cv_ld64_export_dynamic)
5386   fi
5387
5388   if test x"${gcc_cv_ld64_version}" != x; then
5389     AC_DEFINE_UNQUOTED(LD64_VERSION, "${gcc_cv_ld64_version}",
5390       [Define to ld64 version.])
5391   fi
5392
5393   AC_DEFINE_UNQUOTED(LD64_HAS_EXPORT_DYNAMIC, $gcc_cv_ld64_export_dynamic,
5394   [Define to 1 if ld64 supports '-export_dynamic'.])
5395 fi
5396
5397 # --------
5398 # UNSORTED
5399 # --------
5400
5401 AC_CACHE_CHECK(linker --as-needed support,
5402 gcc_cv_ld_as_needed,
5403 [gcc_cv_ld_as_needed=no
5404 gcc_cv_ld_as_needed_option='--as-needed'
5405 gcc_cv_ld_no_as_needed_option='--no-as-needed'
5406 if test $in_tree_ld = yes ; then
5407   if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 16 -o "$gcc_cv_gld_major_version" -gt 2 \
5408      && test $in_tree_ld_is_elf = yes; then
5409     gcc_cv_ld_as_needed=yes
5410   fi
5411 elif test x$gcc_cv_ld != x; then
5412   # Check if linker supports --as-needed and --no-as-needed options
5413   if $gcc_cv_ld --help 2>&1 | grep as-needed > /dev/null; then
5414     gcc_cv_ld_as_needed=yes
5415   fi
5416   case "$target:$gnu_ld" in
5417     *-*-solaris2*:no)
5418       # Solaris 2 ld always supports -z ignore/-z record.  Prefer the native
5419       # forms.
5420       gcc_cv_ld_as_needed=yes
5421       gcc_cv_ld_as_needed_option="-z ignore"
5422       gcc_cv_ld_no_as_needed_option="-z record"
5423       ;;
5424   esac
5425 fi
5426 # --as-needed/-z ignore can only be used if libgcc_s.so.1 uses
5427 # dl_iterate_phdr, i.e. since Solaris 11.
5428 case "$target" in
5429   *-*-solaris2.1[[1-9]]*)
5430     case "$target" in
5431     i?86-*-* | x86_64-*-*)
5432       if echo "$ld_ver" | grep GNU > /dev/null; then
5433         # Doesn't work with gld on Solaris/x86 due to PR ld/12320.
5434         gcc_cv_ld_as_needed=no
5435       fi
5436       ;;
5437     esac
5438     ;;
5439   *-*-solaris2*)
5440     gcc_cv_ld_as_needed=no
5441     ;;
5442 esac
5443 ])
5444 if test x"$gcc_cv_ld_as_needed" = xyes; then
5445         AC_DEFINE(HAVE_LD_AS_NEEDED, 1,
5446 [Define if your linker supports --as-needed/--no-as-needed or equivalent options.])
5447         AC_DEFINE_UNQUOTED(LD_AS_NEEDED_OPTION, "$gcc_cv_ld_as_needed_option",
5448 [Define to the linker option to ignore unused dependencies.])
5449         AC_DEFINE_UNQUOTED(LD_NO_AS_NEEDED_OPTION, "$gcc_cv_ld_no_as_needed_option",
5450 [Define to the linker option to keep unused dependencies.])
5451 fi
5452
5453 AC_MSG_CHECKING(linker mapfile support for clearing hardware capabilities)
5454 saved_LDFLAGS="$LDFLAGS"
5455 for clearcap_map in sol2-clearcapv2.map sol2-clearcap.map; do
5456   LDFLAGS="$saved_LDFLAGS -Wl,-M,${srcdir}/config/$clearcap_map"
5457   AC_LINK_IFELSE([int main(void) {return 0;}],
5458     [gcc_cv_ld_clearcap=yes; break], [gcc_cv_ld_clearcap=no])
5459 done
5460 LDFLAGS="$saved_LDFLAGS"
5461 if test "x$gcc_cv_ld_clearcap" = xyes; then
5462   AC_DEFINE([HAVE_LD_CLEARCAP], 1,
5463 [Define if the linker supports clearing hardware capabilities via mapfile.])
5464   AC_CONFIG_LINKS([clearcap.map:${srcdir}/config/$clearcap_map])
5465 fi
5466 AC_MSG_RESULT($gcc_cv_ld_clearcap)
5467
5468 case "$target" in
5469   powerpc*-*-*)
5470     case "$target" in
5471       *le-*-linux*)
5472         emul_name="-melf32lppc"
5473         ;;
5474       *)
5475         emul_name="-melf32ppc"
5476         ;;
5477     esac
5478     AC_CACHE_CHECK(linker .gnu.attributes long double support,
5479     gcc_cv_ld_ppc_attr,
5480     [gcc_cv_ld_ppc_attr=no
5481     if test x"$ld_is_gold" = xyes; then
5482       gcc_cv_ld_ppc_attr=yes
5483     elif test $in_tree_ld = yes ; then
5484       if test "$gcc_cv_gld_major_version" -eq 2 \
5485                 -a "$gcc_cv_gld_minor_version" -ge 28 \
5486                 -o "$gcc_cv_gld_major_version" -gt 2; then
5487         gcc_cv_ld_ppc_attr=yes
5488       fi
5489     elif test x$gcc_cv_as != x -a x$gcc_cv_ld != x ; then
5490       # check that merging the long double .gnu_attribute doesn't warn
5491       cat > conftest1.s <<EOF
5492         .gnu_attribute 4,1
5493 EOF
5494       cat > conftest2.s <<EOF
5495         .gnu_attribute 4,9
5496 EOF
5497       if $gcc_cv_as -a32 -o conftest1.o conftest1.s > /dev/null 2>&1 \
5498          && $gcc_cv_as -a32 -o conftest2.o conftest2.s > /dev/null 2>&1 \
5499          && $gcc_cv_ld $emul_name -r -o conftest.o conftest1.o conftest2.o > /dev/null 2> conftest.err \
5500          && test ! -s conftest.err; then
5501         gcc_cv_ld_ppc_attr=yes
5502       fi
5503       rm -f conftest.err conftest.o conftest1.o conftest2.o conftest1.s conftest2.s
5504     fi
5505     ])
5506     if test x$gcc_cv_ld_ppc_attr = xyes; then
5507       AC_DEFINE(HAVE_LD_PPC_GNU_ATTR_LONG_DOUBLE, 1,
5508     [Define if your PowerPC linker has .gnu.attributes long double support.])
5509     fi
5510     ;;
5511 esac
5512
5513 case "$target:$tm_file" in
5514   powerpc64-*-freebsd* | powerpc64*-*-linux* | powerpc*-*-linux*rs6000/biarch64.h*)
5515   case "$target" in
5516      *le-*-linux*)
5517      emul_name="-melf64lppc"
5518       ;;
5519      *-*-linux*)
5520      emul_name="-melf64ppc"
5521       ;;
5522      *-*-freebsd*)
5523      emul_name="-melf64ppc_fbsd"
5524       ;;
5525   esac
5526     AC_CACHE_CHECK(linker support for omitting dot symbols,
5527     gcc_cv_ld_no_dot_syms,
5528     [gcc_cv_ld_no_dot_syms=no
5529     if test x"$ld_is_gold" = xyes; then
5530       gcc_cv_ld_no_dot_syms=yes
5531     elif test $in_tree_ld = yes ; then
5532       if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 16 -o "$gcc_cv_gld_major_version" -gt 2; then
5533         gcc_cv_ld_no_dot_syms=yes
5534       fi
5535     elif test x$gcc_cv_as != x -a x$gcc_cv_ld != x ; then
5536       cat > conftest1.s <<EOF
5537         .text
5538         bl .foo
5539 EOF
5540       cat > conftest2.s <<EOF
5541         .section ".opd","aw"
5542         .align 3
5543         .globl foo
5544         .type foo,@function
5545 foo:
5546         .quad .LEfoo,.TOC.@tocbase,0
5547         .text
5548 .LEfoo:
5549         blr
5550         .size foo,.-.LEfoo
5551 EOF
5552       if $gcc_cv_as -a64 -o conftest1.o conftest1.s > /dev/null 2>&1 \
5553          && $gcc_cv_as -a64 -o conftest2.o conftest2.s > /dev/null 2>&1 \
5554          && $gcc_cv_ld $emul_name -o conftest conftest1.o conftest2.o > /dev/null 2>&1; then
5555         gcc_cv_ld_no_dot_syms=yes
5556       fi
5557       rm -f conftest conftest1.o conftest2.o conftest1.s conftest2.s
5558     fi
5559     ])
5560     if test x"$gcc_cv_ld_no_dot_syms" = xyes; then
5561       AC_DEFINE(HAVE_LD_NO_DOT_SYMS, 1,
5562     [Define if your PowerPC64 linker only needs function descriptor syms.])
5563     fi
5564
5565     AC_CACHE_CHECK(linker large toc support,
5566     gcc_cv_ld_large_toc,
5567     [gcc_cv_ld_large_toc=no
5568     if test x"$ld_is_gold" = xyes; then
5569       gcc_cv_ld_large_toc=yes
5570     elif test $in_tree_ld = yes ; then
5571       if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 21 -o "$gcc_cv_gld_major_version" -gt 2; then
5572         gcc_cv_ld_large_toc=yes
5573       fi
5574     elif test x$gcc_cv_as != x -a x$gcc_cv_ld != x ; then
5575       cat > conftest.s <<EOF
5576         .section ".tbss","awT",@nobits
5577         .align 3
5578 ie0:    .space 8
5579         .global _start
5580         .text
5581 _start:
5582         addis 9,13,ie0@got@tprel@ha
5583         ld 9,ie0@got@tprel@l(9)
5584 EOF
5585       if $gcc_cv_as -a64 -o conftest.o conftest.s > /dev/null 2>&1 \
5586          && $gcc_cv_ld $emul_name --no-toc-sort -o conftest conftest.o > /dev/null 2>&1; then
5587         gcc_cv_ld_large_toc=yes
5588       fi
5589       rm -f conftest conftest.o conftest.s
5590     fi
5591     ])
5592     if test x"$gcc_cv_ld_large_toc" = xyes; then
5593       AC_DEFINE(HAVE_LD_LARGE_TOC, 1,
5594     [Define if your PowerPC64 linker supports a large TOC.])
5595     fi
5596
5597     AC_CACHE_CHECK(linker toc pointer alignment,
5598     gcc_cv_ld_toc_align,
5599     [if test x$gcc_cv_as != x -a x$gcc_cv_ld != x -a x$gcc_cv_nm != x; then
5600       cat > conftest.s <<EOF
5601         .global _start
5602         .text
5603 _start:
5604         addis 9,2,x@got@ha
5605         .section .data.rel.ro,"aw",@progbits
5606         .p2align 16
5607         .space 32768
5608 x:      .quad .TOC.
5609 EOF
5610       if $gcc_cv_as -a64 -o conftest.o conftest.s > /dev/null 2>&1 \
5611          && $gcc_cv_ld $emul_name -z norelro -o conftest conftest.o > /dev/null 2>&1; then
5612         gcc_cv_ld_toc_align=`$gcc_cv_nm conftest | ${AWK} '/\.TOC\./ { match ($0, "0[[[:xdigit:]]]*", a); print strtonum ("0x" substr(a[[0]], length(a[[0]])-3)) }'`
5613       fi
5614       rm -f conftest conftest.o conftest.s
5615     fi
5616     ])
5617     if test -n "$gcc_cv_ld_toc_align" && test $gcc_cv_ld_toc_align -gt 8; then
5618       AC_DEFINE_UNQUOTED(POWERPC64_TOC_POINTER_ALIGNMENT, $gcc_cv_ld_toc_align,
5619     [Define to .TOC. alignment forced by your linker.])
5620     fi
5621     ;;
5622 esac
5623
5624 case "$target" in
5625   *-*-aix*)
5626     AC_CACHE_CHECK(linker large toc support,
5627     gcc_cv_ld_large_toc,
5628     [gcc_cv_ld_large_toc=no
5629     if test x$gcc_cv_as != x ; then
5630       cat > conftest.s <<EOF
5631         .toc
5632 LC..1:
5633         .tc a[[TC]],a[[RW]]
5634         .extern a[[RW]]
5635         .csect .text[[PR]]
5636 .largetoctest:
5637         addis 9,LC..1@u(2)
5638         ld 3,LC..1@l(9)
5639 EOF
5640       if $gcc_cv_as -a64 -o conftest.o conftest.s > /dev/null 2>&1; then
5641         gcc_cv_ld_large_toc=yes
5642       fi
5643       rm -f conftest conftest.o conftest.s
5644     fi
5645     ])
5646     if test x"$gcc_cv_ld_large_toc" = xyes; then
5647       AC_DEFINE(HAVE_LD_LARGE_TOC, 1,
5648     [Define if your PowerPC64 linker supports a large TOC.])
5649     fi
5650     ;;
5651 esac
5652
5653 AC_CACHE_CHECK(linker --build-id support,
5654   gcc_cv_ld_buildid,
5655   [gcc_cv_ld_buildid=no
5656   if test $in_tree_ld = yes ; then
5657     if test "$gcc_cv_gld_major_version" -eq 2 -a \
5658        "$gcc_cv_gld_minor_version" -ge 18 -o \
5659        "$gcc_cv_gld_major_version" -gt 2 \
5660        && test $in_tree_ld_is_elf = yes; then
5661       gcc_cv_ld_buildid=yes
5662     fi
5663   elif test x$gcc_cv_ld != x; then
5664     if $gcc_cv_ld --help 2>&1 | grep build-id > /dev/null; then
5665       gcc_cv_ld_buildid=yes
5666     fi
5667   fi])
5668 if test x"$gcc_cv_ld_buildid" = xyes; then
5669   AC_DEFINE(HAVE_LD_BUILDID, 1,
5670   [Define if your linker supports --build-id.])
5671 fi
5672
5673 AC_ARG_ENABLE(linker-build-id,
5674 [AS_HELP_STRING([--enable-linker-build-id],
5675                 [compiler will always pass --build-id to linker])],
5676 [],
5677 enable_linker_build_id=no)
5678
5679 if test x"$enable_linker_build_id" = xyes; then
5680   if test x"$gcc_cv_ld_buildid" = xyes; then
5681     AC_DEFINE(ENABLE_LD_BUILDID, 1,
5682     [Define if gcc should always pass --build-id to linker.])
5683   else
5684     AC_MSG_WARN(--build-id is not supported by your linker; --enable-linker-build-id ignored)
5685   fi
5686 fi
5687
5688 # In binutils 2.21, GNU ld gained support for new emulations fully
5689 # supporting the Solaris 2 ABI.  Detect their presence in the linker used.
5690 AC_CACHE_CHECK(linker *_sol2 emulation support,
5691   gcc_cv_ld_sol2_emulation,
5692   [gcc_cv_ld_sol2_emulation=no
5693   if test $in_tree_ld = yes ; then
5694     if test "$gcc_cv_gld_major_version" -eq 2 -a \
5695        "$gcc_cv_gld_minor_version" -ge 21 -o \
5696        "$gcc_cv_gld_major_version" -gt 2 \
5697        && test $in_tree_ld_is_elf = yes; then
5698       gcc_cv_ld_sol2_emulation=yes
5699     fi
5700   elif test x$gcc_cv_ld != x; then
5701     if $gcc_cv_ld -V 2>/dev/null | sed -e '1,/Supported emulations/d;q' | \
5702        grep _sol2 > /dev/null; then
5703       gcc_cv_ld_sol2_emulation=yes
5704     fi
5705   fi])
5706 if test x"$gcc_cv_ld_sol2_emulation" = xyes; then
5707   AC_DEFINE(HAVE_LD_SOL2_EMULATION, 1,
5708   [Define if your linker supports the *_sol2 emulations.])
5709 fi
5710
5711 AC_CACHE_CHECK(linker --sysroot support,
5712   gcc_cv_ld_sysroot,
5713   [gcc_cv_ld_sysroot=no
5714   if test $in_tree_ld = yes ; then
5715       if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 16 -o "$gcc_cv_gld_major_version" -gt 2 ; then
5716         gcc_cv_ld_sysroot=yes
5717       fi
5718   elif test x$gcc_cv_ld != x; then
5719     if $gcc_cv_ld --help 2>&1 | grep sysroot > /dev/null; then
5720       gcc_cv_ld_sysroot=yes
5721     fi
5722   fi])
5723 if test x"$gcc_cv_ld_sysroot" = xyes; then
5724   AC_DEFINE(HAVE_LD_SYSROOT, 1,
5725   [Define if your linker supports --sysroot.])
5726 fi
5727
5728 case $target in
5729 *-*-solaris2*)
5730   # Check for system-provided CRTs on Solaris 11.x and Solaris 12.
5731   AC_CACHE_CHECK([system-provided CRTs on Solaris],
5732     gcc_cv_solaris_crts,
5733     [gcc_cv_solaris_crts=no
5734      if test x$host != x$target; then
5735        if test "x$with_sysroot" = xyes; then
5736          target_sysroot="${test_exec_prefix}/${target_noncanonical}/sys-root"
5737        else
5738          target_sysroot="${with_sysroot}"
5739        fi
5740      fi
5741      target_libdir="$target_sysroot/usr/lib"
5742      # At the time they were added, gcrt1.o became a symlink for backwards
5743      # compatibility on x86, while crt1.o was added on sparc, so check for that.
5744      case $target in
5745        i?86-*-solaris2* | x86_64-*-solaris2*)
5746          if test -h "$target_libdir/gcrt1.o"; then gcc_cv_solaris_crts=yes; fi
5747          ;;
5748        sparc*-*-solaris2*)
5749          if test -f "$target_libdir/crt1.o"; then gcc_cv_solaris_crts=yes; fi
5750          ;;
5751      esac])
5752   ;;
5753 esac
5754 if test x$gcc_cv_solaris_crts = xyes; then
5755   AC_DEFINE(HAVE_SOLARIS_CRTS, 1,
5756             [Define if the system-provided CRTs are present on Solaris.])
5757 fi
5758
5759 AC_ARG_ENABLE(libssp,
5760 [AS_HELP_STRING([--enable-libssp], [enable linking against libssp])],
5761 [case "${enableval}" in
5762   yes|no)
5763     ;;
5764   *)
5765     AC_MSG_ERROR([unknown libssp setting $enableval])
5766     ;;
5767 esac], [])
5768
5769 # Test for stack protector support in target C library.
5770 AC_CACHE_CHECK(__stack_chk_fail in target C library,
5771   gcc_cv_libc_provides_ssp,
5772   [gcc_cv_libc_provides_ssp=no
5773   if test "x$enable_libssp" = "xno"; then
5774     gcc_cv_libc_provides_ssp=yes
5775   elif test "x$enable_libssp" = "xyes"; then
5776     gcc_cv_libc_provides_ssp=no
5777   else
5778     case "$target" in
5779        *-*-musl*)
5780          # All versions of musl provide stack protector
5781          gcc_cv_libc_provides_ssp=yes;;
5782        *-*-linux* | *-*-kfreebsd*-gnu)
5783       # glibc 2.4 and later provides __stack_chk_fail and
5784       # either __stack_chk_guard, or TLS access to stack guard canary.
5785       GCC_GLIBC_VERSION_GTE_IFELSE([2], [4], [gcc_cv_libc_provides_ssp=yes], [
5786       [if test -f $target_header_dir/features.h \
5787          && $EGREP '^[  ]*#[    ]*define[       ]+__GNU_LIBRARY__[      ]+([1-9][0-9]|[6-9])' \
5788             $target_header_dir/features.h > /dev/null; then
5789         if $EGREP '^[   ]*#[    ]*define[       ]+__UCLIBC__[   ]+1' \
5790              $target_header_dir/features.h > /dev/null && \
5791              test -f $target_header_dir/bits/uClibc_config.h && \
5792              $EGREP '^[         ]*#[    ]*define[       ]+__UCLIBC_HAS_SSP__[   ]+1' \
5793              $target_header_dir/bits/uClibc_config.h > /dev/null; then
5794           gcc_cv_libc_provides_ssp=yes
5795         fi
5796       # all versions of Bionic support stack protector
5797       elif test -f $target_header_dir/sys/cdefs.h \
5798         && $EGREP '^[  ]*#[    ]*define[       ]+__BIONIC__[   ]+1' \
5799            $target_header_dir/sys/cdefs.h > /dev/null; then
5800          gcc_cv_libc_provides_ssp=yes
5801       fi]])
5802         ;;
5803        *-*-gnu*)
5804          # Avoid complicated tests (see
5805          # <http://gcc.gnu.org/ml/gcc/2008-10/msg00130.html>) and for now
5806          # simply assert that glibc does provide this, which is true for all
5807          # realistically usable GNU/Hurd configurations.
5808          # All supported versions of musl provide it as well
5809          gcc_cv_libc_provides_ssp=yes;;
5810        *-*-darwin* | *-*-freebsd* | *-*-netbsd*)
5811          AC_CHECK_FUNC(__stack_chk_fail,[gcc_cv_libc_provides_ssp=yes],
5812            [echo "no __stack_chk_fail on this target"])
5813         ;;
5814        *) gcc_cv_libc_provides_ssp=no ;;
5815     esac
5816   fi])
5817
5818 if test x$gcc_cv_libc_provides_ssp = xyes; then
5819   AC_DEFINE(TARGET_LIBC_PROVIDES_SSP, 1,
5820             [Define if your target C library provides stack protector support])
5821 fi
5822
5823 # Check whether --enable-default-ssp was given.
5824 AC_ARG_ENABLE(default-ssp,
5825 [AS_HELP_STRING([--enable-default-ssp],
5826   [enable Stack Smashing Protection as default])],[
5827 if test x$gcc_cv_libc_provides_ssp = xyes; then
5828   case "$target" in
5829     ia64*-*-*) enable_default_ssp=no ;;
5830     *) enable_default_ssp=$enableval ;;
5831   esac
5832 else
5833   enable_default_ssp=no
5834 fi],
5835 enable_default_ssp=no)
5836 if test x$enable_default_ssp = xyes ; then
5837   AC_DEFINE(ENABLE_DEFAULT_SSP, 1,
5838       [Define if your target supports default stack protector and it is enabled.])
5839 fi
5840 AC_SUBST([enable_default_ssp])
5841
5842 # Test for <sys/sdt.h> on the target.
5843 GCC_TARGET_TEMPLATE([HAVE_SYS_SDT_H])
5844 AC_MSG_CHECKING(sys/sdt.h in the target C library)
5845 have_sys_sdt_h=no
5846 if test -f $target_header_dir/sys/sdt.h; then
5847   have_sys_sdt_h=yes
5848   AC_DEFINE(HAVE_SYS_SDT_H, 1,
5849             [Define if your target C library provides sys/sdt.h])
5850 fi
5851 AC_MSG_RESULT($have_sys_sdt_h)
5852
5853 # Check if TFmode long double should be used by default or not.
5854 # Some glibc targets used DFmode long double, but with glibc 2.4
5855 # and later they can use TFmode.
5856 case "$target" in
5857   powerpc*-*-linux* | \
5858   sparc*-*-linux* | \
5859   s390*-*-linux* | \
5860   alpha*-*-linux*)
5861     AC_ARG_WITH(long-double-128,
5862       [AS_HELP_STRING([--with-long-double-128],
5863                       [use 128-bit long double by default])],
5864       gcc_cv_target_ldbl128="$with_long_double_128",
5865       [GCC_GLIBC_VERSION_GTE_IFELSE([2], [4], [gcc_cv_target_ldbl128=yes], [
5866       [gcc_cv_target_ldbl128=no
5867       grep '^[  ]*#[    ]*define[       ][      ]*__LONG_DOUBLE_MATH_OPTIONAL' \
5868         $target_header_dir/bits/wordsize.h > /dev/null 2>&1 \
5869       && gcc_cv_target_ldbl128=yes
5870       ]])])
5871     ;;
5872 esac
5873 if test x$gcc_cv_target_ldbl128 = xyes; then
5874   AC_DEFINE(TARGET_DEFAULT_LONG_DOUBLE_128, 1,
5875             [Define if TFmode long double should be the default])
5876 fi
5877
5878 # Check if the target LIBC supports exporting the AT_PLATFORM and AT_HWCAP
5879 # values in the TCB.  Currently, only GLIBC 2.23 and later support this.
5880 gcc_cv_libc_provides_hwcap_in_tcb=no
5881 case "$target" in
5882   powerpc*-*-linux*)
5883     GCC_GLIBC_VERSION_GTE_IFELSE([2], [23], [gcc_cv_libc_provides_hwcap_in_tcb=yes], )
5884     ;;
5885 esac
5886 if test x$gcc_cv_libc_provides_hwcap_in_tcb = xyes; then
5887   AC_DEFINE(TARGET_LIBC_PROVIDES_HWCAP_IN_TCB, 1,
5888             [Define if your target C Library provides the AT_HWCAP value in the TCB])
5889 fi
5890
5891 AC_MSG_CHECKING(dl_iterate_phdr in target C library)
5892 gcc_cv_target_dl_iterate_phdr=unknown
5893 case "$target" in
5894   # Restrict to Solaris 11+.  While most of the Solaris 11 linker changes
5895   # were backported to Solaris 10 Update 10, dl_iterate_phdr only lives in
5896   # libdl there, both complicating its use and breaking compatibility
5897   # between Solaris 10 updates.
5898   *-*-solaris2.1[[1-9]]*)
5899     # <link.h> needs both a dl_iterate_phdr declaration and support for
5900     # compilation with largefile support.
5901     if grep dl_iterate_phdr $target_header_dir/link.h > /dev/null 2>&1 \
5902       && grep 'large file capable' $target_header_dir/link.h > /dev/null 2>&1; then
5903       gcc_cv_target_dl_iterate_phdr=yes
5904     else
5905       gcc_cv_target_dl_iterate_phdr=no
5906     fi
5907     ;;
5908   *-*-dragonfly* | *-*-freebsd*)
5909     if grep dl_iterate_phdr $target_header_dir/sys/link_elf.h > /dev/null 2>&1; then
5910       gcc_cv_target_dl_iterate_phdr=yes
5911     else
5912       gcc_cv_target_dl_iterate_phdr=no
5913     fi
5914     ;;
5915   *-linux-musl*)
5916     gcc_cv_target_dl_iterate_phdr=yes
5917     ;;
5918 esac
5919 GCC_TARGET_TEMPLATE([TARGET_DL_ITERATE_PHDR])
5920 if test x$gcc_cv_target_dl_iterate_phdr = xyes; then
5921    AC_DEFINE(TARGET_DL_ITERATE_PHDR, 1,
5922 [Define if your target C library provides the `dl_iterate_phdr' function.])
5923 fi
5924 AC_MSG_RESULT($gcc_cv_target_dl_iterate_phdr)
5925
5926 # We no longer support different GC mechanisms.  Emit an error if
5927 # the user configures with --with-gc.
5928 AC_ARG_WITH(gc,
5929 [AS_HELP_STRING([--with-gc={page,zone}],
5930                 [this option is not supported anymore.  It used to choose
5931                  the garbage collection mechanism to use with the compiler])],
5932 [AC_MSG_ERROR([Configure option --with-gc is only supported up to GCC 4.7.x])],
5933 [])
5934
5935 # Libraries to use on the host.  This will normally be set by the top
5936 # level Makefile.  Here we simply capture the value for our Makefile.
5937 if test -z "${HOST_LIBS+set}"; then
5938   HOST_LIBS=
5939 fi
5940 AC_SUBST(HOST_LIBS)
5941
5942 # Use the system's zlib library.
5943 AM_ZLIB
5944
5945 dnl Very limited version of automake's enable-maintainer-mode
5946
5947 AC_MSG_CHECKING([whether to enable maintainer-specific portions of Makefiles])
5948   dnl maintainer-mode is disabled by default
5949   AC_ARG_ENABLE(maintainer-mode,
5950 [AS_HELP_STRING([--enable-maintainer-mode],
5951                 [enable make rules and dependencies not useful
5952                  (and sometimes confusing) to the casual installer])],
5953       maintainer_mode=$enableval,
5954       maintainer_mode=no)
5955
5956 AC_MSG_RESULT($maintainer_mode)
5957
5958 if test "$maintainer_mode" = "yes"; then
5959   MAINT=''
5960 else
5961   MAINT='#'
5962 fi
5963 AC_SUBST(MAINT)dnl
5964
5965 dnl Whether to prevent multiple front-ends from linking at the same time
5966
5967 AC_MSG_CHECKING([whether to avoid linking multiple front-ends at once])
5968   AC_ARG_ENABLE(link-mutex,
5969 [AS_HELP_STRING([--enable-link-mutex],
5970                 [avoid linking multiple front-ends at once to avoid thrashing
5971                  on the build machine])],
5972       do_link_mutex=$enableval,
5973       do_link_mutex=no)
5974 AC_MSG_RESULT($do_link_mutex)
5975
5976 if test "$do_link_mutex" = "yes"; then
5977    DO_LINK_MUTEX=true
5978 else
5979    DO_LINK_MUTEX=false
5980 fi
5981 AC_SUBST(DO_LINK_MUTEX)
5982
5983 # --------------
5984 # Language hooks
5985 # --------------
5986
5987 # Make empty files to contain the specs and options for each language.
5988 # Then add #include lines to for a compiler that has specs and/or options.
5989
5990 subdirs=
5991 lang_opt_files=
5992 lang_specs_files=
5993 lang_tree_files=
5994 # These (without "all_") are set in each config-lang.in.
5995 # `language' must be a single word so is spelled singularly.
5996 all_languages=
5997 all_compilers=
5998 all_outputs='Makefile'
5999 # List of language makefile fragments.
6000 all_lang_makefrags=
6001 # Additional files for gengtype
6002 all_gtfiles="$target_gtfiles"
6003
6004 # These are the languages that are set in --enable-languages,
6005 # and are available in the GCC tree.
6006 all_selected_languages=
6007
6008 # Add the language fragments.
6009 # Languages are added via two mechanisms.  Some information must be
6010 # recorded in makefile variables, these are defined in config-lang.in.
6011 # We accumulate them and plug them into the main Makefile.
6012 # The other mechanism is a set of hooks for each of the main targets
6013 # like `clean', `install', etc.
6014
6015 language_hooks="Make-hooks"
6016
6017 for lang in ${srcdir}/*/config-lang.in
6018 do
6019 changequote(,)dnl
6020         test "$lang" = "${srcdir}/*/config-lang.in" && continue
6021
6022         lang_alias=`sed -n -e 's,^language=['"'"'"'"]\(.*\)["'"'"'"'].*$,\1,p' -e 's,^language=\([^   ]*\).*$,\1,p' $lang`
6023         if test "x$lang_alias" = x
6024         then
6025               echo "$lang doesn't set \$language." 1>&2
6026               exit 1
6027         fi
6028         subdir="`echo $lang | sed -e 's,^.*/\([^/]*\)/config-lang.in$,\1,'`"
6029         subdirs="$subdirs $subdir"
6030
6031         # $gcc_subdir is where the gcc integration files are to be found
6032         # for a language, both for internal compiler purposes (compiler
6033         # sources implementing front-end to GCC tree converters), and for
6034         # build infrastructure purposes (Make-lang.in, etc.)
6035         #
6036         # This will be <subdir> (relative to $srcdir) if a line like
6037         # gcc_subdir="<subdir>" or gcc_subdir=<subdir>
6038         # is found in <langdir>/config-lang.in, and will remain <langdir>
6039         # otherwise.
6040         #
6041         # Except for the language alias (fetched above), the regular
6042         # "config-lang.in" contents are always retrieved from $gcc_subdir,
6043         # so a <langdir>/config-lang.in setting gcc_subdir typically sets
6044         # only this and the language alias.
6045
6046         gcc_subdir=`sed -n -e 's,^gcc_subdir=['"'"'"'"]\(.*\)["'"'"'"'].*$,\1,p' -e 's,^gcc_subdir=\([^   ]*\).*$,\1,p' $lang`
6047         if [ "$gcc_subdir" = "" ]; then
6048            gcc_subdir="$subdir"
6049         fi
6050
6051         case ",$enable_languages," in
6052         *,$lang_alias,*)
6053             all_selected_languages="$all_selected_languages $lang_alias"
6054             if test -f $srcdir/$gcc_subdir/lang-specs.h; then
6055                 lang_specs_files="$lang_specs_files $srcdir/$gcc_subdir/lang-specs.h"
6056             fi
6057             ;;
6058         esac
6059 changequote([,])dnl
6060
6061         language=
6062         boot_language=
6063         compilers=
6064         outputs=
6065         gtfiles=
6066         subdir_requires=
6067         . ${srcdir}/$gcc_subdir/config-lang.in
6068         if test "x$language" = x
6069         then
6070                 echo "${srcdir}/$gcc_subdir/config-lang.in doesn't set \$language." 1>&2
6071                 exit 1
6072         fi
6073
6074         ok=:
6075         case ",$enable_languages," in
6076                 *,$lang_alias,*) ;;
6077                 *)
6078                         for i in $subdir_requires; do
6079                                 test -f "${srcdir}/$i/config-lang.in" && continue
6080                                 ok=false
6081                                 break
6082                         done
6083                 ;;
6084         esac
6085         $ok || continue
6086
6087         all_lang_makefrags="$all_lang_makefrags \$(srcdir)/$gcc_subdir/Make-lang.in"
6088         if test -f $srcdir/$gcc_subdir/lang.opt; then
6089             lang_opt_files="$lang_opt_files $srcdir/$gcc_subdir/lang.opt"
6090             all_opt_files="$all_opt_files $srcdir/$gcc_subdir/lang.opt"
6091         fi
6092         if test -f $srcdir/$gcc_subdir/$subdir-tree.def; then
6093             lang_tree_files="$lang_tree_files $srcdir/$gcc_subdir/$subdir-tree.def"
6094         fi
6095         all_languages="$all_languages $language"
6096         all_compilers="$all_compilers $compilers"
6097         all_outputs="$all_outputs $outputs"
6098         all_gtfiles="$all_gtfiles [[$subdir]] $gtfiles"
6099         case ",$enable_languages," in
6100                 *,lto,*)
6101                     AC_DEFINE(ENABLE_LTO, 1, [Define to enable LTO support.])
6102                     enable_lto=yes
6103                     AC_SUBST(enable_lto)
6104                     ;;
6105                 *) ;;
6106         esac
6107 done
6108
6109 check_languages=
6110 for language in $all_selected_languages
6111 do
6112         check_languages="$check_languages check-$language"
6113 done
6114
6115 # We link each language in with a set of hooks, reached indirectly via
6116 # lang.${target}.  Only do so for selected languages.
6117
6118 rm -f Make-hooks
6119 touch Make-hooks
6120 target_list="all.cross start.encap rest.encap tags \
6121         install-common install-man install-info install-pdf install-html dvi \
6122         pdf html uninstall info man srcextra srcman srcinfo \
6123         mostlyclean clean distclean maintainer-clean install-plugin"
6124
6125 for t in $target_list
6126 do
6127         x=
6128         for lang in $all_selected_languages
6129         do
6130                 x="$x $lang.$t"
6131         done
6132         echo "lang.$t: $x" >> Make-hooks
6133 done
6134
6135 # --------
6136 # Option include files
6137 # --------
6138
6139 ${AWK} -f $srcdir/opt-include.awk $all_opt_files > option-includes.mk
6140 option_includes="option-includes.mk"
6141 AC_SUBST_FILE(option_includes)
6142
6143 # --------
6144 # UNSORTED
6145 # --------
6146
6147 # Create .gdbinit.
6148
6149 echo "dir ." > .gdbinit
6150 echo "dir ${srcdir}" >> .gdbinit
6151 if test x$gdb_needs_out_file_path = xyes
6152 then
6153         echo "dir ${srcdir}/config/"`dirname ${out_file}` >> .gdbinit
6154 fi
6155 if test "x$subdirs" != x; then
6156         for s in $subdirs
6157         do
6158                 echo "dir ${srcdir}/$s" >> .gdbinit
6159         done
6160 fi
6161 echo "source ${srcdir}/gdbinit.in" >> .gdbinit
6162 echo "python import sys; sys.path.append('${srcdir}'); import gdbhooks" >> .gdbinit
6163
6164 # Put a breakpoint on __asan_report_error to help with debugging buffer
6165 # overflow.
6166 case "$CFLAGS" in
6167 *-fsanitize=address*)
6168   echo "source ${srcdir}/gdbasan.in" >> .gdbinit
6169   ;;
6170 esac
6171
6172 gcc_tooldir='$(libsubdir)/$(libsubdir_to_prefix)$(target_noncanonical)'
6173 AC_SUBST(gcc_tooldir)
6174 AC_SUBST(dollar)
6175
6176 # Find a directory in which to install a shared libgcc.
6177
6178 AC_ARG_ENABLE(version-specific-runtime-libs,
6179 [AS_HELP_STRING([--enable-version-specific-runtime-libs],
6180                 [specify that runtime libraries should be
6181                  installed in a compiler-specific directory])])
6182
6183 # Substitute configuration variables
6184 AC_SUBST(subdirs)
6185 AC_SUBST(srcdir)
6186 AC_SUBST(all_compilers)
6187 AC_SUBST(all_gtfiles)
6188 AC_SUBST(all_lang_makefrags)
6189 AC_SUBST(all_languages)
6190 AC_SUBST(all_selected_languages)
6191 AC_SUBST(build_exeext)
6192 AC_SUBST(build_install_headers_dir)
6193 AC_SUBST(build_xm_file_list)
6194 AC_SUBST(build_xm_include_list)
6195 AC_SUBST(build_xm_defines)
6196 AC_SUBST(build_file_translate)
6197 AC_SUBST(check_languages)
6198 AC_SUBST(cpp_install_dir)
6199 AC_SUBST(xmake_file)
6200 AC_SUBST(tmake_file)
6201 AC_SUBST(TM_ENDIAN_CONFIG)
6202 AC_SUBST(TM_MULTILIB_CONFIG)
6203 AC_SUBST(TM_MULTILIB_EXCEPTIONS_CONFIG)
6204 AC_SUBST(extra_gcc_objs)
6205 AC_SUBST(user_headers_inc_next_pre)
6206 AC_SUBST(user_headers_inc_next_post)
6207 AC_SUBST(extra_headers_list)
6208 AC_SUBST(extra_objs)
6209 AC_SUBST(extra_programs)
6210 AC_SUBST(float_h_file)
6211 AC_SUBST(gcc_config_arguments)
6212 AC_SUBST(gcc_gxx_include_dir)
6213 AC_SUBST(gcc_gxx_include_dir_add_sysroot)
6214 AC_SUBST(host_exeext)
6215 AC_SUBST(host_xm_file_list)
6216 AC_SUBST(host_xm_include_list)
6217 AC_SUBST(host_xm_defines)
6218 AC_SUBST(out_host_hook_obj)
6219 AC_SUBST(install)
6220 AC_SUBST(lang_opt_files)
6221 AC_SUBST(lang_specs_files)
6222 AC_SUBST(lang_tree_files)
6223 AC_SUBST(local_prefix)
6224 AC_SUBST(md_file)
6225 AC_SUBST(objc_boehm_gc)
6226 AC_SUBST(out_file)
6227 AC_SUBST(out_object_file)
6228 AC_SUBST(common_out_file)
6229 AC_SUBST(common_out_object_file)
6230 AC_SUBST(tm_file_list)
6231 AC_SUBST(tm_include_list)
6232 AC_SUBST(tm_defines)
6233 AC_SUBST(tm_p_file_list)
6234 AC_SUBST(tm_p_include_list)
6235 AC_SUBST(xm_file_list)
6236 AC_SUBST(xm_include_list)
6237 AC_SUBST(xm_defines)
6238 AC_SUBST(use_gcc_stdint)
6239 AC_SUBST(c_target_objs)
6240 AC_SUBST(cxx_target_objs)
6241 AC_SUBST(fortran_target_objs)
6242 AC_SUBST(target_cpu_default)
6243
6244 AC_SUBST_FILE(language_hooks)
6245
6246 # Echo link setup.
6247 if test x${build} = x${host} ; then
6248   if test x${host} = x${target} ; then
6249     echo "Links are now set up to build a native compiler for ${target}." 1>&2
6250   else
6251     echo "Links are now set up to build a cross-compiler" 1>&2
6252     echo " from ${host} to ${target}." 1>&2
6253   fi
6254 else
6255   if test x${host} = x${target} ; then
6256     echo "Links are now set up to build (on ${build}) a native compiler" 1>&2
6257     echo " for ${target}." 1>&2
6258   else
6259     echo "Links are now set up to build (on ${build}) a cross-compiler" 1>&2
6260     echo " from ${host} to ${target}." 1>&2
6261   fi
6262 fi
6263
6264 AC_ARG_VAR(GMPLIBS,[How to link GMP])
6265 AC_ARG_VAR(GMPINC,[How to find GMP include files])
6266
6267 AC_ARG_VAR(ISLLIBS,[How to link isl])
6268 AC_ARG_VAR(ISLINC,[How to find isl include files])
6269 if test "x${ISLLIBS}" != "x" ; then
6270    AC_DEFINE(HAVE_isl, 1, [Define if isl is in use.])
6271 fi
6272
6273 GCC_ENABLE_PLUGINS
6274 AC_SUBST(pluginlibs)
6275 AC_SUBST(enable_plugin)
6276 if test x"$enable_plugin" = x"yes"; then
6277   AC_DEFINE(ENABLE_PLUGIN, 1, [Define to enable plugin support.])
6278 fi
6279
6280
6281 # Enable --enable-host-shared
6282 AC_ARG_ENABLE(host-shared,
6283 [AS_HELP_STRING([--enable-host-shared],
6284                 [build host code as shared libraries])],
6285 [PICFLAG=-fPIC], [PICFLAG=])
6286 AC_SUBST(enable_host_shared)
6287 AC_SUBST(PICFLAG)
6288
6289
6290 AC_ARG_ENABLE(libquadmath-support,
6291 [AS_HELP_STRING([--disable-libquadmath-support],
6292   [disable libquadmath support for Fortran])],
6293 ENABLE_LIBQUADMATH_SUPPORT=$enableval,
6294 ENABLE_LIBQUADMATH_SUPPORT=yes)
6295 if test "${ENABLE_LIBQUADMATH_SUPPORT}" != "no" ; then
6296   AC_DEFINE(ENABLE_LIBQUADMATH_SUPPORT, 1,
6297             [Define to 1 to enable libquadmath support])
6298 fi
6299
6300
6301 # Specify what hash style to use by default.
6302 AC_ARG_WITH([linker-hash-style],
6303 [AC_HELP_STRING([--with-linker-hash-style={sysv,gnu,both}],
6304                 [specify the linker hash style])],
6305 [case x"$withval" in
6306    xsysv)
6307      LINKER_HASH_STYLE=sysv
6308      ;;
6309    xgnu)
6310      LINKER_HASH_STYLE=gnu
6311      ;;
6312    xboth)
6313      LINKER_HASH_STYLE=both
6314      ;;
6315    *)
6316      AC_MSG_ERROR([$withval is an invalid option to --with-linker-hash-style])
6317      ;;
6318  esac],
6319 [LINKER_HASH_STYLE=''])
6320 if test x"${LINKER_HASH_STYLE}" != x; then
6321   AC_DEFINE_UNQUOTED(LINKER_HASH_STYLE, "$LINKER_HASH_STYLE",
6322                                          [The linker hash style])
6323 fi
6324
6325 # Specify what should be the default of -fdiagnostics-color option.
6326 AC_ARG_WITH([diagnostics-color],
6327 [AC_HELP_STRING([--with-diagnostics-color={never,auto,auto-if-env,always}],
6328                 [specify the default of -fdiagnostics-color option
6329                  auto-if-env stands for -fdiagnostics-color=auto if
6330                  GCC_COLOR environment variable is present and
6331                  -fdiagnostics-color=never otherwise])],
6332 [case x"$withval" in
6333    xnever)
6334      DIAGNOSTICS_COLOR_DEFAULT=DIAGNOSTICS_COLOR_NO
6335      ;;
6336    xauto)
6337      DIAGNOSTICS_COLOR_DEFAULT=DIAGNOSTICS_COLOR_AUTO
6338      ;;
6339    xauto-if-env)
6340      DIAGNOSTICS_COLOR_DEFAULT=-1
6341      ;;
6342    xalways)
6343      DIAGNOSTICS_COLOR_DEFAULT=DIAGNOSTICS_COLOR_YES
6344      ;;
6345    *)
6346      AC_MSG_ERROR([$withval is an invalid option to --with-diagnostics-color])
6347      ;;
6348  esac],
6349 [DIAGNOSTICS_COLOR_DEFAULT=DIAGNOSTICS_COLOR_AUTO])
6350 AC_DEFINE_UNQUOTED(DIAGNOSTICS_COLOR_DEFAULT, $DIAGNOSTICS_COLOR_DEFAULT,
6351                    [The default for -fdiagnostics-color option])
6352
6353 # Generate gcc-driver-name.h containing GCC_DRIVER_NAME for the benefit
6354 # of jit/jit-playback.c.
6355 cat > gcc-driver-name.h <<EOF
6356 #define GCC_DRIVER_NAME "${target_noncanonical}-gcc-${gcc_BASEVER}${exeext}"
6357 EOF
6358
6359 # Check whether --enable-default-pie was given.
6360 AC_ARG_ENABLE(default-pie,
6361 [AS_HELP_STRING([--enable-default-pie],
6362   [enable Position Independent Executable as default])],
6363 enable_default_pie=$enableval,
6364 enable_default_pie=no)
6365 if test x$enable_default_pie = xyes ; then
6366   AC_DEFINE(ENABLE_DEFAULT_PIE, 1,
6367       [Define if your target supports default PIE and it is enabled.])
6368 fi
6369 AC_SUBST([enable_default_pie])
6370
6371 # Check if -fno-PIE works.
6372 AC_CACHE_CHECK([for -fno-PIE option],
6373   [gcc_cv_c_no_fpie],
6374   [saved_CXXFLAGS="$CXXFLAGS"
6375    CXXFLAGS="$CXXFLAGS -fno-PIE"
6376    AC_COMPILE_IFELSE([int main(void) {return 0;}],
6377      [gcc_cv_c_no_fpie=yes],
6378      [gcc_cv_c_no_fpie=no])
6379    CXXFLAGS="$saved_CXXFLAGS"])
6380 if test "$gcc_cv_c_no_fpie" = "yes"; then
6381   NO_PIE_CFLAGS="-fno-PIE"
6382 fi
6383 AC_SUBST([NO_PIE_CFLAGS])
6384
6385 # Check if -no-pie works.
6386 AC_CACHE_CHECK([for -no-pie option],
6387   [gcc_cv_no_pie],
6388   [saved_LDFLAGS="$LDFLAGS"
6389    LDFLAGS="$LDFLAGS -no-pie"
6390    AC_LINK_IFELSE([int main(void) {return 0;}],
6391      [gcc_cv_no_pie=yes],
6392      [gcc_cv_no_pie=no])
6393    LDFLAGS="$saved_LDFLAGS"])
6394 if test "$gcc_cv_no_pie" = "yes"; then
6395   NO_PIE_FLAG="-no-pie"
6396 fi
6397 AC_SUBST([NO_PIE_FLAG])
6398
6399 # Check linker supports '-z bndplt'
6400 ld_bndplt_support=no
6401 AC_MSG_CHECKING(linker -z bndplt option)
6402 if test x"$ld_is_gold" = xno; then
6403   if test $in_tree_ld = yes ; then
6404     if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 25 -o "$gcc_cv_gld_major_version" -gt 2; then
6405       ld_bndplt_support=yes
6406     fi
6407   elif test x$gcc_cv_ld != x; then
6408     # Check if linker supports -a bndplt option
6409     if $gcc_cv_ld --help 2>&1 | grep -- '-z bndplt' > /dev/null; then
6410       ld_bndplt_support=yes
6411     fi
6412   fi
6413 fi
6414 if test x"$ld_bndplt_support" = xyes; then
6415   AC_DEFINE(HAVE_LD_BNDPLT_SUPPORT, 1,
6416         [Define if your linker supports -z bndplt])
6417 fi
6418 AC_MSG_RESULT($ld_bndplt_support)
6419
6420 # Check linker supports '--push-state'/'--pop-state'
6421 ld_pushpopstate_support=no
6422 AC_MSG_CHECKING(linker --push-state/--pop-state options)
6423 if test x"$ld_is_gold" = xno; then
6424   if test $in_tree_ld = yes ; then
6425     if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 25 -o "$gcc_cv_gld_major_version" -gt 2; then
6426       ld_pushpopstate_support=yes
6427     fi
6428   elif test x$gcc_cv_ld != x; then
6429     # Check if linker supports --push-state/--pop-state options
6430     if $gcc_cv_ld --help 2>&1 | grep -- '--push-state' > /dev/null; then
6431       ld_pushpopstate_support=yes
6432     fi
6433   fi
6434 fi
6435 if test x"$ld_pushpopstate_support" = xyes; then
6436   AC_DEFINE(HAVE_LD_PUSHPOPSTATE_SUPPORT, 1,
6437         [Define if your linker supports --push-state/--pop-state])
6438 fi
6439 AC_MSG_RESULT($ld_pushpopstate_support)
6440
6441 # Configure the subdirectories
6442 # AC_CONFIG_SUBDIRS($subdirs)
6443
6444 # Create the Makefile
6445 # and configure language subdirectories
6446 AC_CONFIG_FILES($all_outputs)
6447
6448 AC_CONFIG_COMMANDS([default],
6449 [
6450 case ${CONFIG_HEADERS} in
6451   *auto-host.h:config.in*)
6452   echo > cstamp-h ;;
6453 esac
6454 # Make sure all the subdirs exist.
6455 for d in $subdirs doc build common c-family
6456 do
6457     test -d $d || mkdir $d
6458 done
6459 ],
6460 [subdirs='$subdirs'])
6461 AC_OUTPUT
6462