libgcc/configure.ac

   1 dnl Process this file with autoconf to produce a configure script.
   2
   3 sinclude(../config/acx.m4)
   4 sinclude(../config/no-executables.m4)
   5
   6 AC_PREREQ(2.59)
   7 AC_INIT([GNU C Runtime Library], 1.0,,[libgcc])
   8 AC_CONFIG_SRCDIR([static-object.mk])
   9
  10 AC_ARG_WITH(target-subdir,
  11 [  --with-target-subdir=SUBDIR      Configuring in a subdirectory for target])
  12 AC_ARG_WITH(cross-host,
  13 [  --with-cross-host=HOST           Configuring with a cross compiler])
  14 AC_ARG_WITH(ld,
  15 [  --with-ld               arrange to use the specified ld (full pathname)])
  16
  17 if test "${srcdir}" = "."; then
  18   if test -n "${with_build_subdir}"; then
  19     libgcc_topdir="${srcdir}/../.."
  20     with_target_subdir=
  21   elif test -z "${with_target_subdir}"; then
  22     libgcc_topdir="${srcdir}/.."
  23   else
  24     if test "${with_target_subdir}" != "."; then
  25       libgcc_topdir="${srcdir}/${with_multisrctop}../.."
  26     else
  27       libgcc_topdir="${srcdir}/${with_multisrctop}.."
  28     fi
  29   fi
  30 else
  31   libgcc_topdir="${srcdir}/.."
  32 fi
  33 AC_SUBST(libgcc_topdir)
  34 AC_CONFIG_AUX_DIR($libgcc_topdir)
  35
  36 AC_ARG_ENABLE(shared,
  37 [  --disable-shared        don't provide a shared libgcc],
  38 [
  39   case $enable_shared in
  40   yes | no) ;;
  41   *)
  42     enable_shared=no
  43     IFS="${IFS=         }"; ac_save_ifs="$IFS"; IFS="${IFS}:,"
  44     for pkg in $enableval; do
  45       if test "X$pkg" = "Xgcc" || test "X$pkg" = "Xlibgcc"; then
  46         enable_shared=yes
  47       fi
  48     done
  49     IFS="$ac_save_ifs"
  50     ;;
  51   esac
  52 ], [enable_shared=yes])
  53 AC_SUBST(enable_shared)
  54
  55 AC_ARG_WITH(slibdir,
  56 [  --with-slibdir=DIR      shared libraries in DIR [LIBDIR]],
  57 slibdir="$with_slibdir",
  58 if test "${enable_version_specific_runtime_libs+set}" = set; then
  59   slibdir='$(libsubdir)'
  60 elif test "$host" != "$target"; then
  61   slibdir='$(build_tooldir)/lib'
  62 else
  63   slibdir='$(libdir)'
  64 fi)
  65 AC_SUBST(slibdir)
  66
  67 AC_PROG_INSTALL
  68
  69 AC_PROG_AWK
  70 # We need awk; bail out if it's missing.
  71 case ${AWK} in
  72   "") AC_MSG_ERROR([can't build without awk, bailing out]) ;;
  73 esac
  74
  75 AC_CANONICAL_HOST
  76 ACX_NONCANONICAL_HOST
  77 GCC_TOPLEV_SUBDIRS
  78
  79 dnl These must be called before AM_PROG_LIBTOOL, because it may want
  80 dnl to call AC_CHECK_PROG.
  81 AC_CHECK_TOOL(AR, ar)
  82 AC_CHECK_TOOL(LIPO, lipo, :)
  83 AC_CHECK_TOOL(NM, nm)
  84 AC_CHECK_TOOL(RANLIB, ranlib, :)
  85 AC_CHECK_TOOL(STRIP, strip, :)
  86 AC_PROG_LN_S
  87
  88 GCC_NO_EXECUTABLES
  89 AC_PROG_CC
  90 AC_PROG_CPP_WERROR
  91
  92 # Check for decimal float support.
  93 AC_CACHE_CHECK([whether decimal floating point is supported], [libgcc_cv_dfp],
  94                [AC_COMPILE_IFELSE([_Decimal32 x;], [libgcc_cv_dfp=yes],
  95                                   [libgcc_cv_dfp=no])])
  96 decimal_float=$libgcc_cv_dfp
  97 AC_SUBST(decimal_float)
  98
  99 # Collect host-machine-specific information.
 100 . ${srcdir}/config.host
 101
 102 # Check for visibility support.  This is after config.host so that
 103 # we can check for asm_hidden_op.
 104 AC_CACHE_CHECK([for __attribute__((visibility("hidden")))],
 105     libgcc_cv_hidden_visibility_attribute, [
 106         echo 'int __attribute__ ((visibility ("hidden"))) foo (void) { return 1; }' > conftest.c
 107         libgcc_cv_hidden_visibility_attribute=no
 108         if AC_TRY_COMMAND(${CC-cc} -Werror -S conftest.c -o conftest.s 1>&AS_MESSAGE_LOG_FD); then
 109             if grep "\\$asm_hidden_op.*foo" conftest.s >/dev/null; then
 110                 libgcc_cv_hidden_visibility_attribute=yes
 111             fi
 112         fi
 113         rm -f conftest.*
 114     ])
 115
 116 if test $libgcc_cv_hidden_visibility_attribute = yes; then
 117     vis_hide='-fvisibility=hidden -DHIDE_EXPORTS'
 118 else
 119     vis_hide=
 120 fi
 121 AC_SUBST(vis_hide)
 122
 123 # Conditionalize the makefile for this target machine.
 124 tmake_file_=
 125 for f in ${tmake_file}
 126 do
 127         if test -f ${srcdir}/config/$f
 128         then
 129                 tmake_file_="${tmake_file_} \$(srcdir)/config/$f"
 130         fi
 131 done
 132 tmake_file="${tmake_file_}"
 133 AC_SUBST(tmake_file)
 134
 135 # Substitute configuration variables
 136 AC_SUBST(extra_parts)
 137 AC_SUBST(asm_hidden_op)
 138
 139 # We need multilib support.
 140 AC_CONFIG_FILES([Makefile])
 141 AC_CONFIG_COMMANDS([default],
 142   [[test -z "$CONFIG_HEADERS" || echo timestamp > stamp-h
 143 if test -n "$CONFIG_FILES"; then
 144   # FIXME: We shouldn't need to set ac_file
 145   ac_file=Makefile
 146   . ${libgcc_topdir}/config-ml.in
 147 fi]],
 148 [[srcdir=${srcdir}
 149 host=${host}
 150 target=${target}
 151 with_target_subdir=${with_target_subdir}
 152 with_multisubdir=${with_multisubdir}
 153 ac_configure_args="--enable-multilib ${ac_configure_args}"
 154 CONFIG_SHELL=${CONFIG_SHELL-/bin/sh}
 155 libgcc_topdir=${libgcc_topdir}
 156 CC="${CC}"
 157 ]])
 158 AC_OUTPUT