gcc/config/darwin.h

   1 /* Target definitions for Darwin (macOS) systems.
   2    Copyright (C) 1989-2023 Free Software Foundation, Inc.
   3    Contributed by Apple Computer Inc.
   4
   5 This file is part of GCC.
   6
   7 GCC is free software; you can redistribute it and/or modify
   8 it under the terms of the GNU General Public License as published by
   9 the Free Software Foundation; either version 3, or (at your option)
  10 any later version.
  11
  12 GCC is distributed in the hope that it will be useful,
  13 but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 GNU General Public License for more details.
  16
  17 Under Section 7 of GPL version 3, you are granted additional
  18 permissions described in the GCC Runtime Library Exception, version
  19 3.1, as published by the Free Software Foundation.
  20
  21 You should have received a copy of the GNU General Public License and
  22 a copy of the GCC Runtime Library Exception along with this program;
  23 see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
  24 <http://www.gnu.org/licenses/>.  */
  25
  26 #ifndef CONFIG_DARWIN_H
  27 #define CONFIG_DARWIN_H
  28
  29 /* The definitions in this file are common to all processor types
  30    running Darwin, which is the kernel for macOS.  Darwin is
  31    basically a BSD user layer laid over a Mach kernel, then evolved
  32    for many years (at NeXT) in parallel with other Unix systems.  So
  33    while the runtime is a somewhat idiosyncratic Mach-based thing,
  34    other definitions look like they would for a BSD variant.  */
  35
  36 /* Although NeXT ran on many different architectures, as of Jan 2001
  37    the only supported Darwin targets are PowerPC and x86.  */
  38
  39 /* One of Darwin's NeXT legacies is the Mach-O format, which is partly
  40    like a.out and partly like COFF, with additional features like
  41    multi-architecture binary support.  */
  42
  43 #define DARWIN_X86 0
  44 #define DARWIN_PPC 0
  45
  46 #define OBJECT_FORMAT_MACHO 1
  47
  48 /* Suppress g++ attempt to link in the math library automatically. */
  49 #define MATH_LIBRARY ""
  50
  51 /* We have atexit.  */
  52
  53 #define HAVE_ATEXIT
  54
  55 /* Define an empty body for the function do_global_dtors() in libgcc2.c.  */
  56
  57 #define DO_GLOBAL_DTORS_BODY
  58
  59 /* Register static destructors to run from __cxa_atexit instead of putting
  60    them into a .mod_term_funcs section.  */
  61
  62 #define TARGET_DTORS_FROM_CXA_ATEXIT true
  63
  64 /* The string value for __SIZE_TYPE__.  */
  65
  66 #ifndef SIZE_TYPE
  67 #define SIZE_TYPE "long unsigned int"
  68 #endif
  69
  70 /* Type used for ptrdiff_t, as a string used in a declaration.  */
  71
  72 #undef  PTRDIFF_TYPE
  73 #define PTRDIFF_TYPE "int"
  74
  75 /* wchar_t is int.  */
  76
  77 #undef  WCHAR_TYPE
  78 #define WCHAR_TYPE "int"
  79 #undef  WCHAR_TYPE_SIZE
  80 #define WCHAR_TYPE_SIZE 32
  81
  82 #define INT8_TYPE "signed char"
  83 #define INT16_TYPE "short int"
  84 #define INT32_TYPE "int"
  85 #define INT64_TYPE "long long int"
  86 #define UINT8_TYPE "unsigned char"
  87 #define UINT16_TYPE "short unsigned int"
  88 #define UINT32_TYPE "unsigned int"
  89 #define UINT64_TYPE "long long unsigned int"
  90
  91 #define INT_LEAST8_TYPE "signed char"
  92 #define INT_LEAST16_TYPE "short int"
  93 #define INT_LEAST32_TYPE "int"
  94 #define INT_LEAST64_TYPE "long long int"
  95 #define UINT_LEAST8_TYPE "unsigned char"
  96 #define UINT_LEAST16_TYPE "short unsigned int"
  97 #define UINT_LEAST32_TYPE "unsigned int"
  98 #define UINT_LEAST64_TYPE "long long unsigned int"
  99
 100 #define INT_FAST8_TYPE "signed char"
 101 #define INT_FAST16_TYPE "short int"
 102 #define INT_FAST32_TYPE "int"
 103 #define INT_FAST64_TYPE "long long int"
 104 #define UINT_FAST8_TYPE "unsigned char"
 105 #define UINT_FAST16_TYPE "short unsigned int"
 106 #define UINT_FAST32_TYPE "unsigned int"
 107 #define UINT_FAST64_TYPE "long long unsigned int"
 108
 109 #define INTPTR_TYPE "long int"
 110 #define UINTPTR_TYPE "long unsigned int"
 111
 112 #define SIG_ATOMIC_TYPE "int"
 113
 114 /* Default to using the NeXT-style runtime, since that's what is
 115    pre-installed on Darwin systems.  */
 116
 117 #define NEXT_OBJC_RUNTIME 100508
 118
 119 /* Don't default to pcc-struct-return, because gcc is the only compiler, and
 120    we want to retain compatibility with older gcc versions.  */
 121
 122 #undef  DEFAULT_PCC_STRUCT_RETURN
 123 #define DEFAULT_PCC_STRUCT_RETURN 0
 124
 125 /* True if pragma ms_struct is in effect.  */
 126 extern GTY(()) int darwin_ms_struct;
 127
 128 /* Darwin has a user convenience feature where some linker options are exposed
 129    at the driver level (so one can type "-all_load" instead of "-Wl,-all_load"
 130    or "-Xlinker -all_load").  We retain this, but now these options are all
 131    marked as 'Driver' and we process them as early as possible so that they
 132    get allocated to the right toolchain command.  There are a couple of special
 133    cases where these driver opts are used multiple times, or to control
 134    operations on more than one command (e.g. dynamiclib).  These are handled
 135    specially and we then add %<xxxx specs for the commands that _don't_ need
 136    them.
 137    We keep a couple of cases where a negative option originally appeared after
 138    the positive alternate, potentially overriding it.
 139    When we report an error with %e, it seems necessary to strip the option
 140    before doing so, otherwise it survives to the cc1 command line (%e doesn't
 141    appear to abort the program before this).
 142    Right now there's no mechanism to split up the "variable portion" (%*) of
 143    the matched spec string, so where we have some driver specs that take 2
 144    or 3 arguments, these cannot be processed here, but are deferred until the
 145    LINK_SPEC, where they are copied verbatim.  */
 146
 147 #undef SUBTARGET_DRIVER_SELF_SPECS
 148 #define SUBTARGET_DRIVER_SELF_SPECS                                     \
 149   "%{static|fapple-kext|mkernel:%{shared|dynamic|dynamiclib: \
 150      %econflicting code generation switches}}",\
 151   "%{shared|dynamiclib:-Xlinker -dylib \
 152      %{allowable_client*:-Xlinker -allowable_client -Xlinker %*} \
 153        %<allowable_client* \
 154      %{bundle_loader*: %<bundle_loader* \
 155        %e-bundle_loader not allowed with -dynamiclib} \
 156      %{client_name*: %<client_name* \
 157        %e-client_name not allowed with -dynamiclib} \
 158      %{compatibility_version*:\
 159        -Xlinker -dylib_compatibility_version -Xlinker %*} \
 160        %<compatibility_version* \
 161      %{current_version*:-Xlinker -dylib_current_version -Xlinker %*} \
 162        %<current_version* \
 163      %{install_name*:-Xlinker -dylib_install_name -Xlinker %* } \
 164        %<install_name* \
 165      %{keep_private_externs: %<keep_private_externs \
 166        %e-keep_private_externs not allowed with -dynamiclib} \
 167      %{private_bundle: %<private_bundle \
 168        %e-private_bundle not allowed with -dynamiclib} \
 169     }",                                                 \
 170   "%{!dynamiclib:%{!shared: \
 171      %{bundle_loader*:-Xlinker -bundle_loader -Xlinker %*} \
 172        %<bundle_loader* \
 173      %{client_name*:-Xlinker -client_name -Xlinker %*} \
 174        %<client_name* \
 175      %{compatibility_version*: %<compatibility_version* \
 176        %e-compatibility_version only allowed with -dynamiclib} \
 177      %{current_version*: %<current_version* \
 178        %e-current_version only allowed with -dynamiclib} \
 179      %{install_name*: %<install_name* \
 180        %e-install_name only allowed with -dynamiclib} \
 181      %{keep_private_externs:-Xlinker -keep_private_externs} \
 182        %<keep_private_externs \
 183      %{private_bundle:-Xlinker -private_bundle} \
 184        %<private_bundle \
 185     }}",                                                                        \
 186   "%{all_load:-Xlinker -all_load} %<all_load",                          \
 187   "%{arch_errors_fatal:-Xlinker -arch_errors_fatal} \
 188     %<arch_errors_fatal",                                               \
 189   "%{bind_at_load:-Xlinker -bind_at_load} %<bind_at_load",              \
 190   "%{bundle:%{!dynamiclib:%{!shared: -Xlinker -bundle; \
 191                             :%e-bundle not allowed with -shared}; \
 192               :%e-bundle not allowed with -dynamiclib}}",               \
 193   "%{dead_strip:-Xlinker -dead_strip} %<dead_strip",                    \
 194   "%{dylib_file*:-Xlinker -dylib_file -Xlinker %*} %<dylib_file*",      \
 195   "%{dylinker:-Xlinker -dylinker} %<dylinker",                          \
 196   "%{dylinker_install_name*:-Xlinker -dylinker_install_name -Xlinker %*}\
 197     %<dylinker_install_name*",                                          \
 198   "%{exported_symbols_list*:-Xlinker -exported_symbols_list -Xlinker %*}\
 199     %<exported_symbols_list",                                           \
 200   "%{findirect-virtual-calls: -fapple-kext} %<findirect-virtual-calls", \
 201   "%{fterminated-vtables: -fapple-kext} %<fterminated-vtables",         \
 202   "%{fapple-kext|mkernel:-static}",                                     \
 203   "%{filelist*:-Xlinker -filelist -Xlinker %*} %<filelist*",            \
 204   "%{flat_namespace:-Xlinker -flat_namespace} %<flat_namespace",        \
 205   "%{force_cpusubtype_ALL:-Xassembler -force_cpusubtype_ALL} ",         \
 206   "%{force_flat_namespace: \
 207      %{!dynamiclib:-Xlinker -force_flat_namespace; \
 208        :%e-force_flat_namespace not allowed with -dynamiclib}} \
 209     %<force_flat_namespace",                                            \
 210   "%{framework*:-Xlinker -framework -Xlinker %*} %<framework*",         \
 211   "%{gfull:-g -fno-eliminate-unused-debug-symbols} %<gfull",            \
 212   "%{gused:-g -feliminate-unused-debug-symbols} %<gused",               \
 213   "%{gsplit-dwarf:%ngsplit-dwarf is not supported on this platform} \
 214     %<gsplit-dwarf",                                                    \
 215   "%{headerpad_max_install_names:-Xlinker -headerpad_max_install_names}\
 216     %<headerpad_max_install_names",                                     \
 217   "%{image_base*:-Xlinker -image_base -Xlinker %*} %<image_base*",      \
 218   "%{init*:-Xlinker -init -Xlinker %*} %<init*",                        \
 219   "%{multi_module:-Xlinker -multi_module} %<multi_module",              \
 220   "%{multiply_defined*:-Xlinker -multiply_defined -Xlinker %*} ",       \
 221   "%{multiplydefinedunused*:\
 222      -Xlinker -multiply_defined_unused -Xlinker %*} \
 223      %<multiplydefinedunused* ",                                        \
 224   "%{no_dead_strip_inits_and_terms:\
 225      -Xlinker -no_dead_strip_inits_and_terms} \
 226      %<no_dead_strip_inits_and_terms",                                  \
 227   "%{nofixprebinding:-Xlinker -nofixprebinding} %<nofixprebinding",     \
 228   "%{nomultidefs:-Xlinker -nomultidefs} %<nomultidefs",                 \
 229   "%{pagezero_size*:-Xlinker -pagezero_size -Xlinker %*} \
 230     %<pagezero_size",                                                   \
 231   "%{prebind:-Xlinker -prebind} %<prebind",                             \
 232   "%{noprebind:-Xlinker -noprebind} %<noprebind",                       \
 233   "%{prebind_all_twolevel_modules:\
 234      -Xlinker -prebind_all_twolevel_modules} \
 235      %<prebind_all_twolevel_modules",                                   \
 236   "%{preload:-Xlinker -preload} %<preload",                             \
 237   "%{read_only_relocs*:-Xlinker -read_only_relocs -Xlinker %*} \
 238      %<read_only_relocs*",                                              \
 239   "%{rpath*: -Xlinker -rpath -Xlinker %*}",                             \
 240   "%{seg_addr_table_filename*: \
 241      -Xlinker -seg_addr_table_filename -Xlinker %*} \
 242      %<seg_addr_table_filename*",                                       \
 243   "%{seg_addr_table*:-Xlinker -seg_addr_table -Xlinker %*} \
 244      %<seg_addr_table*",                                                \
 245   "%{seg1addr*:-Xlinker -image_base -Xlinker %*} %<seg1addr*",          \
 246   "%{seglinkedit:-Xlinker -seglinkedit} %<seglinkedit",                 \
 247   "%{noseglinkedit:-Xlinker -noseglinkedit} %<noseglinkedit",           \
 248   "%{segs_read_only_addr*:-Xlinker -segs_read_only_addr -Xlinker %*} \
 249     %<segs_read_only_addr*",                                            \
 250   "%{segs_read_write_addr*:-Xlinker -segs_read_write_addr -Xlinker %*} \
 251     %<segs_read_write_addr*",                                           \
 252   "%{single_module:-Xlinker -single_module} %<single_module",           \
 253   "%{sub_library*:-Xlinker -sub_library -Xlinker %*} %<sub_library*",   \
 254   "%{sub_umbrella*:-Xlinker -sub_umbrella -Xlinker %*} %<sub_umbrella*",\
 255   "%{twolevel_namespace:-Xlinker -twolevel_namespace} \
 256      %<twolevel_namespace",                                             \
 257   "%{twolevel_namespace_hints:-Xlinker -twolevel_namespace_hints} \
 258      %<twolevel_namespace_hints",                                       \
 259   "%{umbrella*:-Xlinker -umbrella -Xlinker %*} %<umbrella*",            \
 260   "%{undefined*:-Xlinker -undefined -Xlinker %*} %<undefined*",         \
 261   "%{unexported_symbols_list*:\
 262      -Xlinker -unexported_symbols_list -Xlinker %*} \
 263      %<unexported_symbols_list*",                                       \
 264   "%{weak_reference_mismatches*:\
 265     -Xlinker -weak_reference_mismatches -Xlinker %*} \
 266     %<weak_reference_mismatches*",                                      \
 267   "%{whyload:-Xlinker -whyload} %<whyload",                             \
 268   "%{whatsloaded:-Xlinker -whatsloaded} %<whatsloaded",                 \
 269   "%{w:-Xlinker -w}",                                                   \
 270   "%<y*",                                                               \
 271   "%<Mach "
 272
 273 #if LD64_HAS_DEMANGLE
 274 #define DARWIN_LD_DEMANGLE " -demangle "
 275 #else
 276 #define DARWIN_LD_DEMANGLE ""
 277 #endif
 278
 279 #if LD64_HAS_EXPORT_DYNAMIC
 280 #define DARWIN_RDYNAMIC "%{rdynamic:-export_dynamic}"
 281 #else
 282 #define DARWIN_RDYNAMIC "%{rdynamic:%nrdynamic is not supported}"
 283 #endif
 284
 285 #if LD64_HAS_PLATFORM_VERSION
 286 #define DARWIN_PLATFORM_ID \
 287   "%{mmacosx-version-min=*: -platform_version macos %* 0.0} "
 288 #else
 289 #define DARWIN_PLATFORM_ID \
 290   "%{mmacosx-version-min=*:-macosx_version_min %*} "
 291 #endif
 292
 293 /* Code built with mdynamic-no-pic does not support PIE/PIC, so  we disallow
 294    these combinations; we also ensure that the no_pie option is passed to
 295    ld64 on system versions that default to PIE when mdynamic-no-pic is given.
 296    FIXME: we should check that the linker supports the -pie and -no_pie.
 297    options.  */
 298 #define DARWIN_PIE_SPEC \
 299 "%{pie|fpie|fPIE:\
 300    %{mdynamic-no-pic: \
 301      %n'-mdynamic-no-pic' overrides '-pie', '-fpie' or '-fPIE'; \
 302      :%:version-compare(>= 10.5 mmacosx-version-min= -pie) }; \
 303    mdynamic-no-pic:%:version-compare(>= 10.7 mmacosx-version-min= -no_pie) } "
 304
 305 #define DARWIN_NOPIE_SPEC \
 306 "%{no-pie|fno-pie|fno-PIE: \
 307    %:version-compare(>= 10.7 mmacosx-version-min= -no_pie) }"
 308
 309 #define DARWIN_CC1_SPEC                                                 \
 310   "%<dynamic %<force_cpusubtype_ALL %<multiply_defined* %<dynamiclib"
 311
 312 /* When we are using embedded runpaths DARWIN_AT_RPATH is set. */
 313 #if DARWIN_AT_RPATH
 314 # define DARWIN_RPATH_LINK \
 315 "%{!r:%{!nostdlib:%{!nodefaultrpaths:%(darwin_rpaths)}}}"
 316 # define DARWIN_SHARED_LIBGCC "-lgcc_s.1.1"
 317 #else
 318 # define DARWIN_RPATH_LINK ""
 319 # define DARWIN_SHARED_LIBGCC \
 320 "%:version-compare(!> 10.11 mmacosx-version-min= -lgcc_s.1.1) \
 321  %:version-compare(>= 10.11 mmacosx-version-min= -lemutls_w) "
 322 #endif
 323
 324 #define SUBSUBTARGET_OVERRIDE_OPTIONS                                   \
 325   do {                                                                  \
 326     darwin_override_options ();                                         \
 327   } while (0)
 328
 329 #define SUBTARGET_C_COMMON_OVERRIDE_OPTIONS do {                        \
 330     if (flag_mkernel || flag_apple_kext)                                \
 331       {                                                                 \
 332         if (flag_use_cxa_atexit == 2)                                   \
 333           flag_use_cxa_atexit = 0;                                      \
 334         /* kexts should always be built without the coalesced sections  \
 335            because the kernel loader doesn't grok such sections.  */    \
 336         flag_weak = 0;                                                  \
 337         /* No RTTI in kexts.  */                                        \
 338         flag_rtti = 0;                                                  \
 339       }                                                                 \
 340   } while (0)
 341
 342 /* Machine dependent cpp options.  Don't add more options here, add
 343    them to darwin_cpp_builtins in darwin-c.cc.  */
 344
 345 #undef  CPP_SPEC
 346 #define CPP_SPEC "%{static:%{!dynamic:-D__STATIC__}}%{!static:-D__DYNAMIC__}" \
 347         " %{pthread:-D_REENTRANT} "
 348
 349 /* This is a fix for PR41260 by passing -no_compact_unwind on darwin10 and
 350    later until the assembler, linker and libunwind are able to deal with the
 351    output from GCC.
 352
 353    FIXME: we should check that the linker supports the option.
 354 */
 355
 356 #define DARWIN_NOCOMPACT_UNWIND \
 357 " %:version-compare(>= 10.6 mmacosx-version-min= -no_compact_unwind) "
 358
 359 /* In Darwin linker specs we can put -lcrt0.o and ld will search the library
 360    path for crt0.o or -lcrtx.a and it will search for libcrtx.a.  As for
 361    other ports, we can also put xxx.{o,a}%s and get the appropriate complete
 362    startfile absolute directory.  This latter point is important when we want
 363    to override ld's rule of .dylib being found ahead of .a and the user wants
 364    the convenience library to be linked.  */
 365
 366 /* The LINK_COMMAND spec is mostly a clone of the standard LINK_COMMAND_SPEC,
 367    plus precomp, libtool, and fat build additions.
 368
 369    In general, random Darwin linker flags should go into LINK_SPEC
 370    instead of LINK_COMMAND_SPEC.  The command spec is better for
 371    specifying the handling of options understood by generic Unix
 372    linkers, and for positional arguments like libraries.  */
 373
 374 #define LINK_COMMAND_SPEC_A \
 375    "%{!c:%{!E:%{!S:%{!M:%{!MM:%{!fsyntax-only:%{!fdump=*: \
 376     %(linker)" \
 377     DARWIN_LD_DEMANGLE \
 378     LINK_PLUGIN_SPEC \
 379     "%{flto*:%<fcompare-debug*} \
 380      %{flto} %{fno-lto} %{flto=*} \
 381     %l " \
 382     DARWIN_PLATFORM_ID \
 383     LINK_COMPRESS_DEBUG_SPEC \
 384    "%X %{s} %{t} %{Z} %{u*} \
 385     %{e*} %{r} \
 386     %{o*}%{!o:-o a.out} \
 387     %{!r:%{!nostdlib:%{!nostartfiles:%S}}} \
 388     %{L*} %(link_libgcc) %o \
 389     %{!r:%{!nostdlib:%{!nodefaultlibs:\
 390       %{fprofile-arcs|fprofile-generate*|coverage:-lgcov} \
 391       %{fopenacc|fopenmp|%:gt(%{ftree-parallelize-loops=*:%*} 1): \
 392         %{static|static-libgcc|static-libstdc++|static-libgfortran: \
 393           libgomp.a%s; : -lgomp }} \
 394       %{fgnu-tm: \
 395         %{static|static-libgcc|static-libstdc++|static-libgfortran: \
 396           libitm.a%s; : -litm }} \
 397       %{%:sanitize(address): -lasan } \
 398       %{%:sanitize(undefined): -lubsan } \
 399       %(link_ssp) \
 400       %:version-compare(>< 10.6 10.7 mmacosx-version-min= -ld10-uwfef) \
 401       %(link_gcc_c_sequence) \
 402       %{!nodefaultexport:%{dylib|dynamiclib|bundle: \
 403         %:version-compare(>= 10.11 asm_macosx_version_min= -U) \
 404         %:version-compare(>= 10.11 asm_macosx_version_min= ___emutls_get_address) \
 405         %:version-compare(>= 10.11 asm_macosx_version_min= -exported_symbol) \
 406         %:version-compare(>= 10.11 asm_macosx_version_min= ___emutls_get_address) \
 407         %:version-compare(>= 10.11 asm_macosx_version_min= -U) \
 408         %:version-compare(>= 10.11 asm_macosx_version_min= ___emutls_register_common) \
 409         %:version-compare(>= 10.11 asm_macosx_version_min= -exported_symbol) \
 410         %:version-compare(>= 10.11 asm_macosx_version_min= ___emutls_register_common) \
 411       }} \
 412     }}}\
 413     %{!r:%{!nostdlib:%{!nostartfiles:%E}}} %{T*} %{F*} "\
 414     DARWIN_PIE_SPEC \
 415     DARWIN_NOPIE_SPEC \
 416     DARWIN_RDYNAMIC \
 417     DARWIN_NOCOMPACT_UNWIND \
 418     DARWIN_RPATH_LINK \
 419     "}}}}}}} %<pie %<no-pie %<rdynamic %<X %<rpath %<nodefaultrpaths "
 420
 421 /* Spec that controls whether the debug linker is run automatically for
 422    a link step.  This needs to be done if there is a source file on the
 423    command line which will result in a temporary object (and debug is
 424    enabled).  */
 425
 426 #define DSYMUTIL_SPEC \
 427   "%{!c:%{!E:%{!S:%{!r:%{!M:%{!MM:%{!fsyntax-only:%{!fdump=*:\
 428      %{g*:%{!gctf:%{!gbtf:%{%:debug-level-gt(0): -idsym \
 429        %{.c|.cc|.C|.cpp|.cp|.c++|.cxx|.CPP|.m|.mm|.s|.f|.f90|\
 430          .f95|.f03|.f77|.for|.F|.F90|.F95|.F03|.d: -dsym }\
 431       }}}}\
 432    }}}}}}}}"
 433
 434 #define LINK_COMMAND_SPEC LINK_COMMAND_SPEC_A DSYMUTIL_SPEC
 435
 436 /* Tell collect2 to run dsymutil for us as necessary.  */
 437 #define COLLECT_RUN_DSYMUTIL 1
 438
 439 /* We only want one instance of %G, since libSystem (Darwin's -lc) does not
 440    depend on libgcc. */
 441 #undef  LINK_GCC_C_SEQUENCE_SPEC
 442 #define LINK_GCC_C_SEQUENCE_SPEC \
 443  "%G %{!nolibc:%L} "
 444
 445 /* ld64 supports a sysroot, it just has a different name and there's no easy
 446    way to check for it at config time.  */
 447 #undef HAVE_LD_SYSROOT
 448 #define HAVE_LD_SYSROOT 1
 449 /* It seems the only (working) way to get a space after %R is to append a
 450    dangling '/'.  */
 451 #define SYSROOT_SPEC "%{!isysroot*:-syslibroot %R/ } "
 452
 453 /* Do the same as clang, for now, and insert the sysroot for ld when an
 454    isysroot is specified.  */
 455 #define LINK_SYSROOT_SPEC "%{isysroot*:-syslibroot %*} "
 456
 457 /* Suppress the addition of extra prefix paths when a sysroot is in use.  */
 458 #define STANDARD_STARTFILE_PREFIX_1 ""
 459 #define STANDARD_STARTFILE_PREFIX_2 ""
 460
 461
 462 /* Please keep the random linker options in alphabetical order.
 463    Note that options taking arguments may appear multiple times on a command
 464    line with different arguments each time, so put a * after their names so
 465    all of them get passed.  */
 466 #define LINK_SPEC  \
 467   "%{static}%{!static:%{!dynamic:-dynamic}} \
 468    %:remove-outfile(-ldl) \
 469    %:remove-outfile(-lm) \
 470    %:remove-outfile(-lpthread) \
 471    %{fgnu-runtime: %{static|static-libgcc: \
 472                      %:replace-outfile(-lobjc libobjc-gnu.a%s); \
 473                     :%:replace-outfile(-lobjc -lobjc-gnu )}}\
 474    %{static|static-libgcc|static-libgfortran:%:replace-outfile(-lgfortran libgfortran.a%s)}\
 475    %{static|static-libgcc|static-libquadmath:%:replace-outfile(-lquadmath libquadmath.a%s)}\
 476    %{static|static-libgcc|static-libphobos:%:replace-outfile(-lgphobos libgphobos.a%s)}\
 477    %{static|static-libgcc|static-libstdc++|static-libgfortran:%:replace-outfile(-lgomp libgomp.a%s)}\
 478    %{static|static-libgcc|static-libstdc++:%:replace-outfile(-lstdc++ libstdc++.a%s)}\
 479    %{static|static-libgm2:%:replace-outfile(-lm2pim libm2pim.a%s)}\
 480    %{static|static-libgm2:%:replace-outfile(-lm2iso libm2iso.a%s)}\
 481    %{static|static-libgm2:%:replace-outfile(-lm2min libm2min.a%s)}\
 482    %{static|static-libgm2:%:replace-outfile(-lm2log libm2log.a%s)}\
 483    %{static|static-libgm2:%:replace-outfile(-lm2cor libm2cor.a%s)}\
 484   %{force_cpusubtype_ALL:-arch %(darwin_arch)} \
 485    %{!force_cpusubtype_ALL:-arch %(darwin_subarch)} "\
 486    LINK_SYSROOT_SPEC \
 487    "%{!multiply_defined*:%{shared-libgcc: \
 488      %:version-compare(< 10.5 mmacosx-version-min= -multiply_defined) \
 489      %:version-compare(< 10.5 mmacosx-version-min= suppress) }} \
 490    %{sectalign*} %{sectcreate*} %{sectobjectsymbols*}  %{sectorder*} \
 491    %{segaddr*} %{segcreate*} %{segprot*} "
 492
 493 /* Machine dependent libraries.  */
 494
 495 #define LIB_SPEC "%{!static:-lSystem}"
 496
 497 /* Note that by default, -lgcc_eh (which provides a statically-linked unwinder)
 498    is not used. This is because, in general, we need to unwind through system
 499    libraries that are linked with the shared unwinder in libunwind (or libgcc_s
 500    for OSX 10.4/5 [darwin8/9]).
 501
 502    When -static-libgcc is forced: < 10.6, use the unwinder in libgcc_eh (and
 503    find the emultls impl. there too).
 504
 505    For -static-libgcc: >= 10.6, the unwinder *still* comes from libSystem and
 506    we find the emutls impl from lemutls_w. In either case, the builtins etc.
 507    are linked from -lgcc.  The eh library is still available so that it could
 508    be specified explicitly if there is some reason to do so.
 509
 510    When we have specified shared-libgcc or any case that might require
 511    exceptions, we pull the libgcc content (including emulated tls) from
 512    -lgcc_s.1.1 in GCC and the unwinder from /usr/lib/libgcc_s.1 for < 10.6 and
 513    libSystem for >= 10.6 respectively.
 514    Otherwise, we just link the emutls/builtins from convenience libs.
 515
 516    We have to work around that DYLD_XXXX are disabled in macOS 10.11+ which
 517    means that any bootstrap trying to use a shared libgcc with a bumped SO-
 518    name will fail.  This means that we do not accept shared libgcc for these
 519    versions (the primary reason for forcing a shared libgcc was that it
 520    contained the unwinder on Darwin8 and 9).
 521
 522    When using the shared version of gcc_s.1.1 the unwinder is provided by:
 523      * Prior to 10.3.9, then we have to link the static eh lib, since there
 524        is no shared unwinder version on the system.
 525      * from 10.3.9 to 10.5, from /usr/lib/libgcc_s.1.dylib
 526      * from 10.6 onwards, from libSystem.dylib
 527 */
 528 #undef REAL_LIBGCC_SPEC
 529 #define REAL_LIBGCC_SPEC \
 530 "%{static-libgcc|static:                                                  \
 531     %:version-compare(!> 10.6 mmacosx-version-min= -lgcc_eh)              \
 532     %:version-compare(>= 10.6 mmacosx-version-min= -lemutls_w);           \
 533    shared-libgcc|fexceptions|fobjc-exceptions|fgnu-runtime:               \
 534    " DARWIN_SHARED_LIBGCC "                                               \
 535     %:version-compare(!> 10.3.9 mmacosx-version-min= -lgcc_eh)            \
 536     %:version-compare(>< 10.3.9 10.5 mmacosx-version-min= -lgcc_s.10.4)   \
 537     %:version-compare(>< 10.5 10.6 mmacosx-version-min= -lgcc_s.10.5);    \
 538    : -lemutls_w                                                           \
 539   } -lgcc "
 540
 541 /* We specify crt0.o as -lcrt0.o so that ld will search the library path.  */
 542
 543 #undef  STARTFILE_SPEC
 544 #define STARTFILE_SPEC                                                      \
 545 "%{dynamiclib|shared: %(darwin_dylib1) %{fgnu-tm: -lcrttms.o}}             \
 546  %{!dynamiclib:%{!shared:%{bundle:%(darwin_bundle1)}                        \
 547      %{!bundle:%{pg:%{static:-lgcrt0.o}                                     \
 548                      %{!static:%{object:-lgcrt0.o}                          \
 549                                %{!object:%{preload:-lgcrt0.o}               \
 550                                  %{!preload:-lgcrt1.o                       \
 551                                  %:version-compare(>= 10.8 mmacosx-version-min= -no_new_main) \
 552                                  %(darwin_crt2)}}}}    \
 553                 %{!pg:%{static:-lcrt0.o}                                    \
 554                       %{!static:%{object:-lcrt0.o}                          \
 555                                 %{!object:%{preload:-lcrt0.o}               \
 556                                   %{!preload: %(darwin_crt1)                \
 557                                               %(darwin_crt2)}}}}}}}         \
 558  %(darwin_crt3) "
 559
 560 /* We want a destructor last in the list.  */
 561 #define TM_DESTRUCTOR "%{fgnu-tm: -lcrttme.o}"
 562 #define ENDFILE_SPEC TM_DESTRUCTOR
 563
 564 #define DARWIN_EXTRA_SPECS                                              \
 565   { "darwin_crt1", DARWIN_CRT1_SPEC },                                  \
 566   { "darwin_crt2", DARWIN_CRT2_SPEC },                                  \
 567   { "darwin_crt3", DARWIN_CRT3_SPEC },                                  \
 568   { "darwin_dylib1", DARWIN_DYLIB1_SPEC },                              \
 569   { "darwin_bundle1", DARWIN_BUNDLE1_SPEC },                            \
 570   { "darwin_rpaths", DARWIN_RPATH_SPEC },
 571
 572 #define DARWIN_CRT1_SPEC                                                \
 573   "%:version-compare(!> 10.5 mmacosx-version-min= -lcrt1.o)             \
 574    %:version-compare(>< 10.5 10.6 mmacosx-version-min= -lcrt1.10.5.o)   \
 575    %:version-compare(>< 10.6 10.8 mmacosx-version-min= -lcrt1.10.6.o)   \
 576    %{fgnu-tm: -lcrttms.o}"
 577
 578 #define DARWIN_CRT2_SPEC ""
 579
 580 /* crt3.o provides __cxa_atexit on systems that don't have it (and a fix
 581    up for faulty versions on 10.4).  Since it's only used with C++, which
 582    requires passing -shared-libgcc, key off that to avoid unnecessarily
 583    adding a destructor to every program built for 10.4 or earlier.  */
 584
 585 #define DARWIN_CRT3_SPEC \
 586 "%{shared-libgcc:%:version-compare(< 10.5 mmacosx-version-min= crt3.o%s)}"
 587
 588 #define DARWIN_DYLIB1_SPEC                                              \
 589   "%:version-compare(!> 10.5 mmacosx-version-min= -ldylib1.o)           \
 590    %:version-compare(>< 10.5 10.6 mmacosx-version-min= -ldylib1.10.5.o)"
 591
 592 #define DARWIN_BUNDLE1_SPEC \
 593 "%{!static:%:version-compare(< 10.6 mmacosx-version-min= -lbundle1.o)   \
 594            %{fgnu-tm: -lcrttms.o}}"
 595
 596 #if DARWIN_AT_RPATH
 597 /* A default rpath, that picks up dependent libraries installed in the same
 598    director as one being loaded.  */
 599 #define DARWIN_RPATH_SPEC \
 600   "%:version-compare(>= 10.5 mmacosx-version-min= -rpath) \
 601    %:version-compare(>= 10.5 mmacosx-version-min= @loader_path) \
 602    %P "
 603 #else
 604 #define DARWIN_RPATH_SPEC ""
 605 #endif
 606
 607 #ifdef HAVE_AS_MMACOSX_VERSION_MIN_OPTION
 608 /* Emit macosx version (but only major).  */
 609 #define ASM_MMACOSX_VERSION_MIN_SPEC \
 610 "%{asm_macosx_version_min=*: -mmacosx-version-min=%* } \
 611    %<asm_macosx_version_min=* "
 612 #else
 613 #define ASM_MMACOSX_VERSION_MIN_SPEC " %<asm_macosx_version_min=* "
 614 #endif
 615
 616 #if HAVE_GNU_AS
 617 /* The options are added in gcc.cc for this case.  */
 618 #define ASM_OPTIONS ""
 619 #else
 620 /* When we detect that we're cctools or llvm as, we need to insert the right
 621    additional options.  Actually, currently these are the same as GAS.  */
 622 #define ASM_OPTIONS "%{v} %{w:-W} %{I*}"
 623 #endif
 624
 625 /* Default Darwin ASM_SPEC, very simple. */
 626 #define ASM_SPEC \
 627 "%{static} -arch %(darwin_arch) " \
 628 ASM_OPTIONS ASM_MMACOSX_VERSION_MIN_SPEC
 629
 630 #define ASM_DEBUG_SPEC  ""
 631 #undef  ASM_DEBUG_OPTION_SPEC
 632 #define ASM_DEBUG_OPTION_SPEC   ""
 633
 634 #define ASM_FINAL_SPEC \
 635   "%{gsplit-dwarf:%ngsplit-dwarf is not supported on this platform} \
 636      %<gsplit-dwarf"
 637
 638 /* We now require C++11 to bootstrap and newer tools than those based on
 639    stabs, so require DWARF-2, even if stabs is supported by the assembler.  */
 640
 641 #define DWARF2_DEBUGGING_INFO 1
 642 #define PREFERRED_DEBUGGING_TYPE DWARF2_DEBUG
 643
 644 #define DEBUG_FRAME_SECTION       "__DWARF,__debug_frame,regular,debug"
 645 #define DEBUG_INFO_SECTION        "__DWARF,__debug_info,regular,debug"
 646 #define DEBUG_ABBREV_SECTION      "__DWARF,__debug_abbrev,regular,debug"
 647 #define DEBUG_ARANGES_SECTION     "__DWARF,__debug_aranges,regular,debug"
 648 #define DEBUG_MACINFO_SECTION     "__DWARF,__debug_macinfo,regular,debug"
 649 #define DEBUG_LINE_SECTION        "__DWARF,__debug_line,regular,debug"
 650 #define DEBUG_LOC_SECTION         "__DWARF,__debug_loc,regular,debug"
 651 #define DEBUG_LOCLISTS_SECTION    "__DWARF,__debug_loclists,regular,debug"
 652
 653 #define DEBUG_STR_SECTION         "__DWARF,__debug_str,regular,debug"
 654 #define DEBUG_STR_OFFSETS_SECTION "__DWARF,__debug_str_offs,regular,debug"
 655 #define DEBUG_RANGES_SECTION      "__DWARF,__debug_ranges,regular,debug"
 656 #define DEBUG_RNGLISTS_SECTION    "__DWARF,__debug_rnglists,regular,debug"
 657 #define DEBUG_MACRO_SECTION       "__DWARF,__debug_macro,regular,debug"
 658
 659 #define DEBUG_LTO_INFO_SECTION    "__GNU_DWARF_LTO,__debug_info,regular,debug"
 660 #define DEBUG_LTO_ABBREV_SECTION  "__GNU_DWARF_LTO,__debug_abbrev,regular,debug"
 661 #define DEBUG_LTO_MACINFO_SECTION "__GNU_DWARF_LTO,__debug_macinfo,regular,debug"
 662 #define DEBUG_LTO_LINE_SECTION    "__GNU_DWARF_LTO,__debug_line,regular,debug"
 663 #define DEBUG_LTO_STR_SECTION     "__GNU_DWARF_LTO,__debug_str,regular,debug"
 664 #define DEBUG_LTO_MACRO_SECTION   "__GNU_DWARF_LTO,__debug_macro,regular,debug"
 665
 666 #define TARGET_WANT_DEBUG_PUB_SECTIONS true
 667 #define DEBUG_PUBNAMES_SECTION   ((debug_generate_pub_sections == 2) \
 668                                ? "__DWARF,__debug_gnu_pubn,regular,debug" \
 669                                : "__DWARF,__debug_pubnames,regular,debug")
 670
 671 #define DEBUG_PUBTYPES_SECTION   ((debug_generate_pub_sections == 2) \
 672                                ? "__DWARF,__debug_gnu_pubt,regular,debug" \
 673                                : "__DWARF,__debug_pubtypes,regular,debug")
 674
 675 /* GCC's definition of 'one_only' is the same as its definition of 'weak'.  */
 676 #define MAKE_DECL_ONE_ONLY(DECL) (DECL_WEAK (DECL) = 1)
 677
 678 /* Mach-O supports 'weak imports', and 'weak definitions' in coalesced
 679    sections.  machopic_select_section ensures that weak variables go in
 680    coalesced sections.  Weak aliases (or any other kind of aliases) are
 681    not supported.  Weak symbols that aren't visible outside the .s file
 682    are not supported.  */
 683 #define ASM_WEAKEN_DECL(FILE, DECL, NAME, ALIAS)                        \
 684   do {                                                                  \
 685     if (ALIAS)                                                          \
 686       {                                                                 \
 687         warning (0, "alias definitions not supported in Mach-O; ignored");      \
 688         break;                                                          \
 689       }                                                                 \
 690                                                                         \
 691     if (! DECL_EXTERNAL (DECL) && TREE_PUBLIC (DECL))                   \
 692       targetm.asm_out.globalize_label (FILE, NAME);                     \
 693     if (DECL_EXTERNAL (DECL))                                           \
 694       fputs ("\t.weak_reference ", FILE);                               \
 695     else if (lookup_attribute ("weak_import", DECL_ATTRIBUTES (DECL)))  \
 696       break;                                                            \
 697     else if (TREE_PUBLIC (DECL))                                        \
 698       fputs ("\t.weak_definition ", FILE);                              \
 699     else                                                                \
 700       break;                                                            \
 701     assemble_name (FILE, NAME);                                         \
 702     fputc ('\n', FILE);                                                 \
 703   } while (0)
 704
 705 /* Darwin has the pthread routines in libSystem, which every program
 706    links to, so there's no need for weak-ness for that.  */
 707 #define GTHREAD_USE_WEAK 0
 708
 709 /* On Darwin, we don't (at the time of writing) have linkonce sections
 710    with names, so it's safe to make the class data not comdat.  */
 711 #define TARGET_CXX_CLASS_DATA_ALWAYS_COMDAT hook_bool_void_false
 712
 713 /* For efficiency, on Darwin the RTTI information that is always
 714    emitted in the standard C++ library should not be COMDAT.  */
 715 #define TARGET_CXX_LIBRARY_RTTI_COMDAT hook_bool_void_false
 716
 717 /* We make exception information linkonce. */
 718 #undef TARGET_USES_WEAK_UNWIND_INFO
 719 #define TARGET_USES_WEAK_UNWIND_INFO 1
 720
 721 /* We need to use a nonlocal label for the start of an EH frame: the
 722    Darwin linker requires that a coalesced section start with a label.
 723    Unfortunately, it also requires that 'debug' sections don't contain
 724    labels.  */
 725 #undef FRAME_BEGIN_LABEL
 726 #define FRAME_BEGIN_LABEL (for_eh ? "EH_frame" : "Lframe")
 727
 728 /* Emit a label for the FDE corresponding to DECL.  EMPTY means
 729    emit a label for an empty FDE. */
 730 #define TARGET_ASM_EMIT_UNWIND_LABEL darwin_emit_unwind_label
 731
 732 /* Emit a label to separate the exception table.  */
 733 #define TARGET_ASM_EMIT_EXCEPT_TABLE_LABEL darwin_emit_except_table_label
 734
 735 /* Make an EH (personality or LDSA) symbol indirect as needed.  */
 736 #define TARGET_ASM_MAKE_EH_SYMBOL_INDIRECT darwin_make_eh_symbol_indirect
 737
 738 /* Some of Darwin's unwinders need current frame address state to be reset
 739    after a DW_CFA_restore_state recovers the register values.  */
 740 #undef TARGET_ASM_SHOULD_RESTORE_CFA_STATE
 741 #define TARGET_ASM_SHOULD_RESTORE_CFA_STATE darwin_should_restore_cfa_state
 742
 743 /* Our profiling scheme doesn't LP labels and counter words.  */
 744
 745 #define NO_PROFILE_COUNTERS     1
 746
 747 #undef  INIT_SECTION_ASM_OP
 748 #define INIT_SECTION_ASM_OP ""
 749
 750 #undef  INVOKE__main
 751
 752 #define TARGET_ASM_CONSTRUCTOR  machopic_asm_out_constructor
 753 #define TARGET_ASM_DESTRUCTOR   machopic_asm_out_destructor
 754
 755 /* Always prefix with an underscore.  */
 756
 757 #define USER_LABEL_PREFIX "_"
 758
 759 /* A dummy symbol that will be replaced with the function base name.  */
 760 #define MACHOPIC_FUNCTION_BASE_NAME "<pic base>"
 761
 762 /* Don't output a .file directive.  That is only used by the assembler for
 763    error reporting.  */
 764 #undef  TARGET_ASM_FILE_START_FILE_DIRECTIVE
 765 #define TARGET_ASM_FILE_START_FILE_DIRECTIVE false
 766
 767 #undef  TARGET_ASM_FILE_END
 768 #define TARGET_ASM_FILE_END darwin_file_end
 769
 770 /* Because Mach-O relocations have a counter from 1 to 255 for the
 771    section number they apply to, it is necessary to output all
 772    normal sections before the LTO sections, to make sure that the
 773    sections that may have relocations always have a section number
 774    smaller than 255.  */
 775 #undef  TARGET_ASM_LTO_START
 776 #define TARGET_ASM_LTO_START darwin_asm_lto_start
 777 #undef  TARGET_ASM_LTO_END
 778 #define TARGET_ASM_LTO_END darwin_asm_lto_end
 779
 780 #define ASM_OUTPUT_SKIP(FILE,SIZE)  \
 781   fprintf (FILE, "\t.space " HOST_WIDE_INT_PRINT_UNSIGNED"\n", SIZE)
 782
 783 /* Give ObjC methods pretty symbol names.  */
 784
 785 #undef  OBJC_GEN_METHOD_LABEL
 786 #define OBJC_GEN_METHOD_LABEL(BUF,IS_INST,CLASS_NAME,CAT_NAME,SEL_NAME,NUM) \
 787   do { if (CAT_NAME)                                                    \
 788          sprintf (BUF, "%c[%s(%s) %s]", (IS_INST) ? '-' : '+',          \
 789                   (CLASS_NAME), (CAT_NAME), (SEL_NAME));                \
 790        else                                                             \
 791          sprintf (BUF, "%c[%s %s]", (IS_INST) ? '-' : '+',              \
 792                   (CLASS_NAME), (SEL_NAME));                            \
 793      } while (0)
 794
 795 #undef ASM_DECLARE_OBJECT_NAME
 796 #define ASM_DECLARE_OBJECT_NAME(FILE, NAME, DECL) \
 797         darwin_asm_declare_object_name ((FILE), (NAME), (DECL))
 798
 799 /* The RTTI data (e.g., __ti4name) is common and public (and static),
 800    but it does need to be referenced via indirect PIC data pointers.
 801    The machopic_define_symbol calls are telling the machopic subsystem
 802    that the name *is* defined in this module, so it doesn't need to
 803    make them indirect.  */
 804
 805 #undef ASM_DECLARE_FUNCTION_NAME
 806 #define ASM_DECLARE_FUNCTION_NAME(FILE, NAME, DECL)                     \
 807   do {                                                                  \
 808     const char *xname = NAME;                                           \
 809     if (GET_CODE (XEXP (DECL_RTL (DECL), 0)) != SYMBOL_REF)             \
 810       xname = IDENTIFIER_POINTER (DECL_NAME (DECL));                    \
 811     if (! DECL_WEAK (DECL)                                              \
 812         && ((TREE_STATIC (DECL)                                         \
 813              && (!DECL_COMMON (DECL) || !TREE_PUBLIC (DECL)))           \
 814             || DECL_INITIAL (DECL)))                                    \
 815         machopic_define_symbol (DECL_RTL (DECL));                       \
 816     if ((TREE_STATIC (DECL)                                             \
 817          && (!DECL_COMMON (DECL) || !TREE_PUBLIC (DECL)))               \
 818         || DECL_INITIAL (DECL))                                         \
 819       (* targetm.encode_section_info) (DECL, DECL_RTL (DECL), false);   \
 820     ASM_OUTPUT_FUNCTION_LABEL (FILE, xname, DECL);                      \
 821   } while (0)
 822
 823 #undef TARGET_ASM_DECLARE_CONSTANT_NAME
 824 #define TARGET_ASM_DECLARE_CONSTANT_NAME darwin_asm_declare_constant_name
 825
 826 /* Wrap new method names in quotes so the assembler doesn't gag.
 827    Make Objective-C internal symbols local and in doing this, we need
 828    to accommodate the name mangling done by c++ on file scope locals.  */
 829
 830 int darwin_label_is_anonymous_local_objc_name (const char *name);
 831
 832 #undef  ASM_OUTPUT_LABELREF
 833 #define ASM_OUTPUT_LABELREF(FILE,NAME)                                       \
 834   do {                                                                       \
 835        const char *xname = (NAME);                                           \
 836        if (! strcmp (xname, MACHOPIC_FUNCTION_BASE_NAME))                    \
 837          machopic_output_function_base_name(FILE);                           \
 838        else if (xname[0] == '&' || xname[0] == '*')                          \
 839          {                                                                   \
 840            int len = strlen (xname);                                         \
 841            if (len > 6 && !strcmp ("$stub", xname + len - 5))                \
 842              machopic_validate_stub_or_non_lazy_ptr (xname);                 \
 843            else if (len > 7 && !strcmp ("$stub\"", xname + len - 6))         \
 844              machopic_validate_stub_or_non_lazy_ptr (xname);                 \
 845            else if (len > 14 && !strcmp ("$non_lazy_ptr", xname + len - 13)) \
 846              machopic_validate_stub_or_non_lazy_ptr (xname);                 \
 847            else if (len > 15 && !strcmp ("$non_lazy_ptr\"", xname + len - 14)) \
 848              machopic_validate_stub_or_non_lazy_ptr (xname);                 \
 849            if (xname[1] != '"' && name_needs_quotes (&xname[1]))             \
 850              fprintf (FILE, "\"%s\"", &xname[1]);                            \
 851            else                                                              \
 852              fputs (&xname[1], FILE);                                        \
 853          }                                                                   \
 854        else if (xname[0] == '+' || xname[0] == '-')                          \
 855          fprintf (FILE, "\"%s\"", xname);                                    \
 856        else if (darwin_label_is_anonymous_local_objc_name (xname))           \
 857          fprintf (FILE, "L%s", xname);                                       \
 858        else if (xname[0] != '"' && name_needs_quotes (xname))                \
 859          asm_fprintf (FILE, "\"%U%s\"", xname);                              \
 860        else                                                                  \
 861          asm_fprintf (FILE, "%U%s", xname);                                  \
 862   } while (0)
 863
 864 /* Output before executable code.  */
 865 #undef TEXT_SECTION_ASM_OP
 866 #define TEXT_SECTION_ASM_OP "\t.text"
 867
 868 /* Output before writable data.  */
 869
 870 #undef DATA_SECTION_ASM_OP
 871 #define DATA_SECTION_ASM_OP "\t.data"
 872
 873 #undef  ALIGN_ASM_OP
 874 #define ALIGN_ASM_OP            ".align"
 875
 876 #undef  ASM_OUTPUT_ALIGN
 877 #define ASM_OUTPUT_ALIGN(FILE,LOG)      \
 878   if ((LOG) != 0)                       \
 879     fprintf (FILE, "\t%s\t%d\n", ALIGN_ASM_OP, (LOG))
 880
 881 /* The maximum alignment which the object file format can support in bits
 882    which depends on the OS version and whether the object is a common
 883    variable.  */
 884
 885 #undef  MAX_OFILE_ALIGNMENT
 886 #define MAX_OFILE_ALIGNMENT ((1U << L2_MAX_OFILE_ALIGNMENT) * 8U)
 887
 888 /*  These are the three variants that emit referenced blank space.  */
 889 #define ASM_OUTPUT_ALIGNED_BSS(FILE, DECL, NAME, SIZE, ALIGN)           \
 890         darwin_output_aligned_bss ((FILE), (DECL), (NAME), (SIZE), (ALIGN))
 891
 892 #undef  ASM_OUTPUT_ALIGNED_DECL_LOCAL
 893 #define ASM_OUTPUT_ALIGNED_DECL_LOCAL(FILE, DECL, NAME, SIZE, ALIGN)    \
 894         darwin_asm_output_aligned_decl_local                            \
 895                                   ((FILE), (DECL), (NAME), (SIZE), (ALIGN))
 896
 897 #undef  ASM_OUTPUT_ALIGNED_DECL_COMMON
 898 #define ASM_OUTPUT_ALIGNED_DECL_COMMON(FILE, DECL, NAME, SIZE, ALIGN)   \
 899         darwin_asm_output_aligned_decl_common                           \
 900                                    ((FILE), (DECL), (NAME), (SIZE), (ALIGN))
 901
 902 /* The generic version, archs should over-ride where required.  */
 903 #define MACHOPIC_NL_SYMBOL_PTR_SECTION ".non_lazy_symbol_pointer"
 904
 905 /* Declare the section variables.  */
 906 #ifndef USED_FOR_TARGET
 907 enum darwin_section_enum {
 908 #define DEF_SECTION(NAME, FLAGS, DIRECTIVE, OBJC) NAME,
 909 #include "darwin-sections.def"
 910 #undef DEF_SECTION
 911   NUM_DARWIN_SECTIONS
 912 };
 913 extern GTY(()) section * darwin_sections[NUM_DARWIN_SECTIONS];
 914 #endif
 915
 916 #undef  TARGET_ASM_SELECT_SECTION
 917 #define TARGET_ASM_SELECT_SECTION machopic_select_section
 918
 919 #undef  TARGET_ASM_FUNCTION_SECTION
 920 #define TARGET_ASM_FUNCTION_SECTION darwin_function_section
 921
 922 #undef  TARGET_ASM_SELECT_RTX_SECTION
 923 #define TARGET_ASM_SELECT_RTX_SECTION machopic_select_rtx_section
 924 #undef  TARGET_ASM_UNIQUE_SECTION
 925 #define TARGET_ASM_UNIQUE_SECTION darwin_unique_section
 926 #undef  TARGET_ASM_FUNCTION_RODATA_SECTION
 927 #define TARGET_ASM_FUNCTION_RODATA_SECTION default_no_function_rodata_section
 928
 929 #undef  TARGET_ASM_TM_CLONE_TABLE_SECTION
 930 #define TARGET_ASM_TM_CLONE_TABLE_SECTION darwin_tm_clone_table_section
 931
 932 #undef  TARGET_ASM_RELOC_RW_MASK
 933 #define TARGET_ASM_RELOC_RW_MASK machopic_reloc_rw_mask
 934
 935 /* Globalizing directive for a label.  */
 936 #define GLOBAL_ASM_OP "\t.globl "
 937 #define TARGET_ASM_GLOBALIZE_LABEL darwin_globalize_label
 938
 939 /* Emit an assembler directive to set visibility for a symbol.  Used
 940    to support visibility attribute and Darwin's private extern
 941    feature.  */
 942 #undef TARGET_ASM_ASSEMBLE_VISIBILITY
 943 #define TARGET_ASM_ASSEMBLE_VISIBILITY darwin_assemble_visibility
 944
 945 /* Extra attributes for Darwin.  */
 946 #define SUBTARGET_ATTRIBUTE_TABLE                                            \
 947   /* { name, min_len, max_len, decl_req, type_req, fn_type_req,              \
 948        affects_type_identity, handler, exclude } */                          \
 949   { "apple_kext_compatibility", 0, 0, false, true, false, false,             \
 950     darwin_handle_kext_attribute, NULL },                                    \
 951   { "weak_import", 0, 0, true, false, false, false,                          \
 952     darwin_handle_weak_import_attribute, NULL }
 953
 954 /* Make local constant labels linker-visible, so that if one follows a
 955    weak_global constant, ld64 will be able to separate the atoms.  */
 956 #undef ASM_GENERATE_INTERNAL_LABEL
 957 #define ASM_GENERATE_INTERNAL_LABEL(LABEL,PREFIX,NUM)   \
 958   do {                                                  \
 959     if (strcmp ("LC", PREFIX) == 0)                     \
 960       sprintf (LABEL, "*%s%ld", "lC", (long)(NUM));     \
 961     else if (strcmp ("Lubsan_data", PREFIX) == 0)       \
 962       sprintf (LABEL, "*%s%ld", "lubsan_data", (long)(NUM));\
 963     else if (strcmp ("Lubsan_type", PREFIX) == 0)       \
 964       sprintf (LABEL, "*%s%ld", "lubsan_type", (long)(NUM));\
 965     else if (strcmp ("LASAN", PREFIX) == 0)     \
 966       sprintf (LABEL, "*%s%ld", "lASAN", (long)(NUM));\
 967     else if (strcmp ("LTRAMP", PREFIX) == 0)    \
 968       sprintf (LABEL, "*%s%ld", "lTRAMP", (long)(NUM));\
 969     else                                                \
 970       sprintf (LABEL, "*%s%ld", PREFIX, (long)(NUM));   \
 971   } while (0)
 972
 973 #undef TARGET_ASM_MARK_DECL_PRESERVED
 974 #define TARGET_ASM_MARK_DECL_PRESERVED darwin_mark_decl_preserved
 975
 976 /* Any port using this header needs to define the first available
 977    subtarget symbol bit: SYMBOL_FLAG_SUBT_DEP.  */
 978
 979 /* Is a variable. */
 980 #define MACHO_SYMBOL_FLAG_VARIABLE (SYMBOL_FLAG_SUBT_DEP)
 981 #define MACHO_SYMBOL_VARIABLE_P(RTX) \
 982   ((SYMBOL_REF_FLAGS (RTX) & MACHO_SYMBOL_FLAG_VARIABLE) != 0)
 983
 984 /* Set on a symbol that must be indirected, even when there is a
 985    definition in the TU.  The ABI mandates that common symbols are so
 986    indirected, as are weak.  If 'fix-and-continue' is operational then
 987    data symbols might also be.  */
 988
 989 #define MACHO_SYMBOL_FLAG_MUST_INDIRECT ((SYMBOL_FLAG_SUBT_DEP) << 1)
 990 #define MACHO_SYMBOL_MUST_INDIRECT_P(RTX) \
 991   ((SYMBOL_REF_FLAGS (RTX) & MACHO_SYMBOL_FLAG_MUST_INDIRECT) != 0)
 992
 993 /* Set on a symbol with SYMBOL_FLAG_FUNCTION or MACHO_SYMBOL_FLAG_VARIABLE
 994    to indicate that the function or variable is considered defined in this
 995    translation unit.  */
 996
 997 #define MACHO_SYMBOL_FLAG_DEFINED ((SYMBOL_FLAG_SUBT_DEP) << 2)
 998 #define MACHO_SYMBOL_DEFINED_P(RTX) \
 999   ((SYMBOL_REF_FLAGS (RTX) & MACHO_SYMBOL_FLAG_DEFINED) != 0)
1000
1001 /* Set on a symbol that has specified non-default visibility.  */
1002
1003 #define MACHO_SYMBOL_FLAG_HIDDEN_VIS ((SYMBOL_FLAG_SUBT_DEP) << 3)
1004 #define MACHO_SYMBOL_HIDDEN_VIS_P(RTX) \
1005   ((SYMBOL_REF_FLAGS (RTX) & MACHO_SYMBOL_FLAG_HIDDEN_VIS) != 0)
1006
1007 /* Set on a symbol that should be made visible to the linker (overriding
1008    'L' symbol prefixes).  */
1009
1010 #define MACHO_SYMBOL_FLAG_LINKER_VIS ((SYMBOL_FLAG_SUBT_DEP) << 4)
1011 #define MACHO_SYMBOL_LINKER_VIS_P(RTX) \
1012   ((SYMBOL_REF_FLAGS (RTX) & MACHO_SYMBOL_FLAG_LINKER_VIS) != 0)
1013
1014 /* Set on a symbol that is a pic stub or symbol indirection (i.e. the
1015    L_xxxxx${stub,non_lazy_ptr,lazy_ptr}.  */
1016
1017 #define MACHO_SYMBOL_FLAG_INDIRECTION ((SYMBOL_FLAG_SUBT_DEP) << 5)
1018 #define MACHO_SYMBOL_INDIRECTION_P(RTX) \
1019   ((SYMBOL_REF_FLAGS (RTX) & MACHO_SYMBOL_FLAG_INDIRECTION) != 0)
1020
1021 /* Set on a symbol to indicate when fix-and-continue style code
1022    generation is being used and the symbol refers to a static symbol
1023    that should be rebound from new instances of a translation unit to
1024    the original instance of the data.  */
1025
1026 #define MACHO_SYMBOL_FLAG_STATIC ((SYMBOL_FLAG_SUBT_DEP) << 6)
1027 #define MACHO_SYMBOL_STATIC_P(RTX) \
1028   ((SYMBOL_REF_FLAGS (RTX) & MACHO_SYMBOL_FLAG_STATIC) != 0)
1029
1030 /* Symbolic names for various things we might know about a symbol.  */
1031
1032 enum machopic_addr_class {
1033   MACHOPIC_UNDEFINED,
1034   MACHOPIC_DEFINED_DATA,
1035   MACHOPIC_UNDEFINED_DATA,
1036   MACHOPIC_DEFINED_FUNCTION,
1037   MACHOPIC_UNDEFINED_FUNCTION
1038 };
1039
1040 /* Macros defining the various PIC cases.  */
1041
1042 #undef  MACHO_DYNAMIC_NO_PIC_P
1043 #define MACHO_DYNAMIC_NO_PIC_P  (TARGET_MACHO_DYNAMIC_NO_PIC)
1044 #undef  MACHOPIC_INDIRECT
1045 #define MACHOPIC_INDIRECT       (flag_pic || MACHO_DYNAMIC_NO_PIC_P)
1046 #define MACHOPIC_JUST_INDIRECT  (MACHO_DYNAMIC_NO_PIC_P)
1047 #undef  MACHOPIC_PURE
1048 #define MACHOPIC_PURE           (flag_pic && ! MACHO_DYNAMIC_NO_PIC_P)
1049
1050 #undef TARGET_ENCODE_SECTION_INFO
1051 #define TARGET_ENCODE_SECTION_INFO  darwin_encode_section_info
1052 #undef TARGET_STRIP_NAME_ENCODING
1053 #define TARGET_STRIP_NAME_ENCODING  default_strip_name_encoding
1054
1055 #define GEN_BINDER_NAME_FOR_STUB(BUF,STUB,STUB_LENGTH)          \
1056   do {                                                          \
1057     const char *const stub_ = (STUB);                           \
1058     char *buffer_ = (BUF);                                      \
1059     strcpy (buffer_, stub_);                                    \
1060     if (stub_[0] == '"')                                        \
1061       {                                                         \
1062         strcpy (buffer_ + (STUB_LENGTH) - 1, "_binder\"");      \
1063       }                                                         \
1064     else                                                        \
1065       {                                                         \
1066         strcpy (buffer_ + (STUB_LENGTH), "_binder");            \
1067       }                                                         \
1068   } while (0)
1069
1070 #define GEN_SYMBOL_NAME_FOR_SYMBOL(BUF,SYMBOL,SYMBOL_LENGTH)    \
1071   do {                                                          \
1072     const char *const symbol_ = (SYMBOL);                       \
1073     char *buffer_ = (BUF);                                      \
1074     if (name_needs_quotes (symbol_) && symbol_[0] != '"')       \
1075       {                                                         \
1076           sprintf (buffer_, "\"%s\"", symbol_);                 \
1077       }                                                         \
1078     else                                                        \
1079       {                                                         \
1080         strcpy (buffer_, symbol_);                              \
1081       }                                                         \
1082   } while (0)
1083
1084 /* Given a symbol name string, create the lazy pointer version
1085    of the symbol name.  */
1086
1087 #define GEN_LAZY_PTR_NAME_FOR_SYMBOL(BUF,SYMBOL,SYMBOL_LENGTH)  \
1088   do {                                                          \
1089     const char *symbol_ = (SYMBOL);                             \
1090     char *buffer_ = (BUF);                                      \
1091     if (symbol_[0] == '"')                                      \
1092       {                                                         \
1093         strcpy (buffer_, "\"L");                                \
1094         strcpy (buffer_ + 2, symbol_ + 1);                      \
1095         strcpy (buffer_ + (SYMBOL_LENGTH), "$lazy_ptr\"");      \
1096       }                                                         \
1097     else if (name_needs_quotes (symbol_))                       \
1098       {                                                         \
1099         strcpy (buffer_, "\"L");                                \
1100         strcpy (buffer_ + 2, symbol_);                          \
1101         strcpy (buffer_ + (SYMBOL_LENGTH) + 2, "$lazy_ptr\"");  \
1102       }                                                         \
1103     else                                                        \
1104       {                                                         \
1105         strcpy (buffer_, "L");                                  \
1106         strcpy (buffer_ + 1, symbol_);                          \
1107         strcpy (buffer_ + (SYMBOL_LENGTH) + 1, "$lazy_ptr");    \
1108       }                                                         \
1109   } while (0)
1110
1111 #define EH_FRAME_SECTION_NAME   "__TEXT"
1112 #define EH_FRAME_SECTION_ATTR ",coalesced,no_toc+strip_static_syms+live_support"
1113
1114 #undef ASM_PREFERRED_EH_DATA_FORMAT
1115 #define ASM_PREFERRED_EH_DATA_FORMAT(CODE,GLOBAL)  \
1116   (((CODE) == 2 && (GLOBAL) == 1) || ((CODE) == 0 && (GLOBAL) == 1) \
1117    ? (DW_EH_PE_pcrel | DW_EH_PE_indirect | DW_EH_PE_sdata4) : \
1118      ((CODE) == 1 || (GLOBAL) == 0) ? DW_EH_PE_pcrel : DW_EH_PE_absptr)
1119
1120 #define ASM_OUTPUT_DWARF_DELTA(FILE,SIZE,LABEL1,LABEL2)  \
1121   darwin_asm_output_dwarf_delta (FILE, SIZE, LABEL1, LABEL2, 0)
1122
1123 #define ASM_OUTPUT_DWARF_OFFSET(FILE,SIZE,LABEL,OFFSET,BASE)  \
1124   darwin_asm_output_dwarf_offset (FILE, SIZE, LABEL, OFFSET, BASE)
1125
1126 #define ASM_MAYBE_OUTPUT_ENCODED_ADDR_RTX(ASM_OUT_FILE, ENCODING, SIZE, ADDR, DONE)     \
1127       if (ENCODING == ASM_PREFERRED_EH_DATA_FORMAT (2, 1)) {                            \
1128         darwin_non_lazy_pcrel (ASM_OUT_FILE, ADDR);                                     \
1129         goto DONE;                                                                      \
1130       }
1131
1132 /* Experimentally, putting jump tables in text is faster on SPEC.
1133    Also this is needed for correctness for coalesced functions.  */
1134
1135 #ifndef JUMP_TABLES_IN_TEXT_SECTION
1136 #define JUMP_TABLES_IN_TEXT_SECTION 1
1137 #endif
1138
1139 #define TARGET_TERMINATE_DW2_EH_FRAME_INFO false
1140
1141 #define TARGET_ASM_INIT_SECTIONS darwin_init_sections
1142 #undef TARGET_ASM_NAMED_SECTION
1143 #define TARGET_ASM_NAMED_SECTION darwin_asm_named_section
1144
1145 #define DARWIN_REGISTER_TARGET_PRAGMAS()                        \
1146   do {                                                          \
1147     if (!flag_preprocess_only)                                  \
1148       cpp_register_pragma (parse_in, NULL, "mark",              \
1149                            darwin_pragma_ignore, false);        \
1150     c_register_pragma (0, "options", darwin_pragma_options);    \
1151     c_register_pragma (0, "segment", darwin_pragma_ignore);     \
1152     c_register_pragma (0, "unused", darwin_pragma_unused);      \
1153     c_register_pragma (0, "ms_struct", darwin_pragma_ms_struct); \
1154   } while (0)
1155
1156 #undef ASM_APP_ON
1157 #define ASM_APP_ON ""
1158 #undef ASM_APP_OFF
1159 #define ASM_APP_OFF ""
1160
1161 void darwin_register_frameworks (const char *, const char *, int);
1162 void darwin_register_objc_includes (const char *, const char *, int);
1163 #define TARGET_EXTRA_PRE_INCLUDES darwin_register_objc_includes
1164 #define TARGET_EXTRA_INCLUDES darwin_register_frameworks
1165
1166 void add_framework_path (char *);
1167 #define TARGET_OPTF add_framework_path
1168
1169 #define TARGET_POSIX_IO
1170
1171 #define WINT_TYPE "int"
1172
1173 /* Every program on darwin links against libSystem which contains the pthread
1174    routines, so there's no need to explicitly call out when doing threaded
1175    work.  */
1176
1177 #undef GOMP_SELF_SPECS
1178 #define GOMP_SELF_SPECS ""
1179 #undef GTM_SELF_SPECS
1180 #define GTM_SELF_SPECS ""
1181
1182 /* Darwin disables section anchors by default.
1183    They should be enabled per arch where support exists in that arch.  */
1184 #define TARGET_ASM_OUTPUT_ANCHOR NULL
1185 #define DARWIN_SECTION_ANCHORS 0
1186
1187 #define HAVE_ENABLE_EXECUTE_STACK
1188
1189 /* For Apple KEXTs, we make the constructors return this to match gcc
1190    2.95.  */
1191 #define TARGET_CXX_CDTOR_RETURNS_THIS (darwin_kextabi_p)
1192 #define TARGET_KEXTABI flag_apple_kext
1193
1194 /* We have target-specific builtins.  */
1195 #define SUBTARGET_FOLD_BUILTIN darwin_fold_builtin
1196
1197 #define TARGET_N_FORMAT_TYPES 1
1198 #define TARGET_FORMAT_TYPES darwin_additional_format_types
1199
1200 #ifndef USED_FOR_TARGET
1201 extern void darwin_driver_init (unsigned int *,struct cl_decoded_option **);
1202 #define GCC_DRIVER_HOST_INITIALIZATION \
1203   darwin_driver_init (&decoded_options_count, &decoded_options)
1204 #endif
1205
1206 /* The Apple assembler and linker do not support constructor priorities.  */
1207 #undef SUPPORTS_INIT_PRIORITY
1208 #define SUPPORTS_INIT_PRIORITY 0
1209
1210 #undef STACK_CHECK_STATIC_BUILTIN
1211 #define STACK_CHECK_STATIC_BUILTIN 1
1212
1213 /* When building cross-compilers (and native crosses) we shall default to
1214    providing an osx-version-min of this unless overridden by the User.
1215    10.5 is the only version that fully supports all our archs so that's the
1216    fall-back default.  */
1217 #ifndef DEF_MIN_OSX_VERSION
1218 #define DEF_MIN_OSX_VERSION "10.5"
1219 #endif
1220
1221 /* Later versions of ld64 support coalescing weak code/data without requiring
1222    that they be placed in specially identified sections.  This is the earliest
1223    _tested_ version known to support this so far.  */
1224 #define MIN_LD64_NO_COAL_SECTS "236.3"
1225
1226 /* From at least version 62.1, ld64 can build symbol indirection stubs as
1227    needed, and there is no need for the compiler to emit them.  */
1228 #define MIN_LD64_OMIT_STUBS "62.1"
1229
1230 /* Emit start labels for init and term sections from this version.  */
1231 #define MIN_LD64_INIT_TERM_START_LABELS "136.0"
1232
1233 /* If we have no definition for the linker version, pick the minimum version
1234    that will bootstrap the compiler.  */
1235 #ifndef LD64_VERSION
1236 # ifndef  DEF_LD64
1237 #  define LD64_VERSION "85.2.1"
1238 # else
1239 #  define LD64_VERSION DEF_LD64
1240 # endif
1241 #endif
1242
1243 /* CTF and BTF support.  */
1244 #undef CTF_INFO_SECTION_NAME
1245 #define CTF_INFO_SECTION_NAME "__CTF_BTF,__ctf,regular,debug"
1246 #undef BTF_INFO_SECTION_NAME
1247 #define BTF_INFO_SECTION_NAME "__CTF_BTF,__btf,regular,debug"
1248
1249 #endif /* CONFIG_DARWIN_H */