gcc/config/darwin.h

   1 /* Target definitions for Darwin (Mac OS X) systems.
   2    Copyright (C) 1989-2013 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 Mac OS X.  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 /* Don't assume anything about the header files.  */
  47 #define NO_IMPLICIT_EXTERN_C
  48
  49 /* Suppress g++ attempt to link in the math library automatically. */
  50 #define MATH_LIBRARY ""
  51
  52 /* We have atexit.  */
  53
  54 #define HAVE_ATEXIT
  55
  56 /* Define an empty body for the function do_global_dtors() in libgcc2.c.  */
  57
  58 #define DO_GLOBAL_DTORS_BODY
  59
  60 /* The string value for __SIZE_TYPE__.  */
  61
  62 #ifndef SIZE_TYPE
  63 #define SIZE_TYPE "long unsigned int"
  64 #endif
  65
  66 /* Type used for ptrdiff_t, as a string used in a declaration.  */
  67
  68 #undef  PTRDIFF_TYPE
  69 #define PTRDIFF_TYPE "int"
  70
  71 /* wchar_t is int.  */
  72
  73 #undef  WCHAR_TYPE
  74 #define WCHAR_TYPE "int"
  75 #undef  WCHAR_TYPE_SIZE
  76 #define WCHAR_TYPE_SIZE 32
  77
  78 #define INT8_TYPE "signed char"
  79 #define INT16_TYPE "short int"
  80 #define INT32_TYPE "int"
  81 #define INT64_TYPE "long long int"
  82 #define UINT8_TYPE "unsigned char"
  83 #define UINT16_TYPE "short unsigned int"
  84 #define UINT32_TYPE "unsigned int"
  85 #define UINT64_TYPE "long long unsigned int"
  86
  87 #define INT_LEAST8_TYPE "signed char"
  88 #define INT_LEAST16_TYPE "short int"
  89 #define INT_LEAST32_TYPE "int"
  90 #define INT_LEAST64_TYPE "long long int"
  91 #define UINT_LEAST8_TYPE "unsigned char"
  92 #define UINT_LEAST16_TYPE "short unsigned int"
  93 #define UINT_LEAST32_TYPE "unsigned int"
  94 #define UINT_LEAST64_TYPE "long long unsigned int"
  95
  96 #define INT_FAST8_TYPE "signed char"
  97 #define INT_FAST16_TYPE "short int"
  98 #define INT_FAST32_TYPE "int"
  99 #define INT_FAST64_TYPE "long long int"
 100 #define UINT_FAST8_TYPE "unsigned char"
 101 #define UINT_FAST16_TYPE "short unsigned int"
 102 #define UINT_FAST32_TYPE "unsigned int"
 103 #define UINT_FAST64_TYPE "long long unsigned int"
 104
 105 #define INTPTR_TYPE "long int"
 106 #define UINTPTR_TYPE "long unsigned int"
 107
 108 #define SIG_ATOMIC_TYPE "int"
 109
 110 /* Default to using the NeXT-style runtime, since that's what is
 111    pre-installed on Darwin systems.  */
 112
 113 #define NEXT_OBJC_RUNTIME 1
 114
 115 /* Don't default to pcc-struct-return, because gcc is the only compiler, and
 116    we want to retain compatibility with older gcc versions.  */
 117
 118 #undef  DEFAULT_PCC_STRUCT_RETURN
 119 #define DEFAULT_PCC_STRUCT_RETURN 0
 120
 121 /* True if pragma ms_struct is in effect.  */
 122 extern GTY(()) int darwin_ms_struct;
 123
 124 #define DRIVER_SELF_SPECS                                       \
 125   "%{gfull:-g -fno-eliminate-unused-debug-symbols} %<gfull",    \
 126   "%{gused:-g -feliminate-unused-debug-symbols} %<gused",       \
 127   "%{fapple-kext|mkernel:-static}",                             \
 128   "%{shared:-Zdynamiclib} %<shared"
 129
 130 #define DARWIN_CC1_SPEC                                                 \
 131   "%{findirect-virtual-calls: -fapple-kext} %<findirect-virtual-calls " \
 132   "%{fterminated-vtables: -fapple-kext} %<fterminated-vtables "         \
 133   "%<filelist* %<framework*"
 134
 135 #define SUBSUBTARGET_OVERRIDE_OPTIONS                                   \
 136   do {                                                                  \
 137     darwin_override_options ();                                         \
 138   } while (0)
 139
 140 #define SUBTARGET_C_COMMON_OVERRIDE_OPTIONS do {                        \
 141     if (flag_mkernel || flag_apple_kext)                                \
 142       {                                                                 \
 143         if (flag_use_cxa_atexit == 2)                                   \
 144           flag_use_cxa_atexit = 0;                                      \
 145         /* kexts should always be built without the coalesced sections  \
 146            because the kernel loader doesn't grok such sections.  */    \
 147         flag_weak = 0;                                                  \
 148         /* No RTTI in kexts.  */                                        \
 149         flag_rtti = 0;                                                  \
 150       }                                                                 \
 151   } while (0)
 152
 153 /* Machine dependent cpp options.  Don't add more options here, add
 154    them to darwin_cpp_builtins in darwin-c.c.  */
 155
 156 #undef  CPP_SPEC
 157 #define CPP_SPEC "%{static:%{!dynamic:-D__STATIC__}}%{!static:-D__DYNAMIC__}" \
 158         " %{pthread:-D_REENTRANT}"
 159
 160 /* This is mostly a clone of the standard LINK_COMMAND_SPEC, plus
 161    precomp, libtool, and fat build additions.
 162
 163    In general, random Darwin linker flags should go into LINK_SPEC
 164    instead of LINK_COMMAND_SPEC.  The command spec is better for
 165    specifying the handling of options understood by generic Unix
 166    linkers, and for positional arguments like libraries.  */
 167
 168 #define LINK_COMMAND_SPEC_A \
 169    "%{!fdump=*:%{!fsyntax-only:%{!c:%{!M:%{!MM:%{!E:%{!S:\
 170     %(linker)" \
 171     LINK_PLUGIN_SPEC \
 172     "%{flto*:%<fcompare-debug*} \
 173     %{flto*} \
 174     %l %X %{s} %{t} %{Z} %{u*} \
 175     %{e*} %{r} \
 176     %{o*}%{!o:-o a.out} \
 177     %{!nostdlib:%{!nostartfiles:%S}} \
 178     %{L*} %(link_libgcc) %o %{fprofile-arcs|fprofile-generate*|coverage:-lgcov} \
 179     %{fopenmp|ftree-parallelize-loops=*: \
 180       %{static|static-libgcc|static-libstdc++|static-libgfortran: libgomp.a%s; : -lgomp } } \
 181     %{fsanitize=address: -framework CoreFoundation -lasan } \
 182     %{fgnu-tm: \
 183       %{static|static-libgcc|static-libstdc++|static-libgfortran: libitm.a%s; : -litm } } \
 184     %{!nostdlib:%{!nodefaultlibs:\
 185       %(link_ssp) %(link_gcc_c_sequence)\
 186     }}\
 187     %{!nostdlib:%{!nostartfiles:%E}} %{T*} %{F*} }}}}}}}"
 188
 189 #define DSYMUTIL "\ndsymutil"
 190
 191 #define DSYMUTIL_SPEC \
 192    "%{!fdump=*:%{!fsyntax-only:%{!c:%{!M:%{!MM:%{!E:%{!S:\
 193     %{v} \
 194     %{gdwarf-2:%{!gstabs*:%{!g0: -idsym}}}\
 195     %{.c|.cc|.C|.cpp|.cp|.c++|.cxx|.CPP|.m|.mm: \
 196     %{gdwarf-2:%{!gstabs*:%{!g0: -dsym}}}}}}}}}}}"
 197
 198 #define LINK_COMMAND_SPEC LINK_COMMAND_SPEC_A DSYMUTIL_SPEC
 199
 200 /* Tell collect2 to run dsymutil for us as necessary.  */
 201 #define COLLECT_RUN_DSYMUTIL 1
 202
 203 /* We only want one instance of %G, since libSystem (Darwin's -lc) does not depend
 204    on libgcc.  */
 205 #undef  LINK_GCC_C_SEQUENCE_SPEC
 206 #define LINK_GCC_C_SEQUENCE_SPEC "%G %L"
 207
 208 #ifdef TARGET_SYSTEM_ROOT
 209 #define LINK_SYSROOT_SPEC \
 210   "%{isysroot*:-syslibroot %*;:-syslibroot " TARGET_SYSTEM_ROOT "}"
 211 #else
 212 #define LINK_SYSROOT_SPEC "%{isysroot*:-syslibroot %*}"
 213 #endif
 214
 215 #define PIE_SPEC "%{fpie|pie|fPIE:}"
 216
 217 /* Please keep the random linker options in alphabetical order (modulo
 218    'Z' and 'no' prefixes). Note that options taking arguments may appear
 219    multiple times on a command line with different arguments each time,
 220    so put a * after their names so all of them get passed.  */
 221 #define LINK_SPEC  \
 222   "%{static}%{!static:-dynamic} \
 223    %:remove-outfile(-ldl) \
 224    %:remove-outfile(-lm) \
 225    %:remove-outfile(-lpthread) \
 226    %{fgnu-runtime: %{static|static-libgcc: \
 227                      %:replace-outfile(-lobjc libobjc-gnu.a%s); \
 228                     :%:replace-outfile(-lobjc -lobjc-gnu ) } }\
 229    %{static|static-libgcc|static-libgfortran:%:replace-outfile(-lgfortran libgfortran.a%s)}\
 230    %{static|static-libgcc|static-libstdc++|static-libgfortran:%:replace-outfile(-lgomp libgomp.a%s)}\
 231    %{static|static-libgcc|static-libstdc++:%:replace-outfile(-lstdc++ libstdc++.a%s)}\
 232    %{!Zdynamiclib: \
 233      %{Zforce_cpusubtype_ALL:-arch %(darwin_arch) -force_cpusubtype_ALL} \
 234      %{!Zforce_cpusubtype_ALL:-arch %(darwin_subarch)} \
 235      %{Zbundle:-bundle} \
 236      %{Zbundle_loader*:-bundle_loader %*} \
 237      %{client_name*} \
 238      %{compatibility_version*:%e-compatibility_version only allowed with -dynamiclib\
 239 } \
 240      %{current_version*:%e-current_version only allowed with -dynamiclib} \
 241      %{Zforce_flat_namespace:-force_flat_namespace} \
 242      %{Zinstall_name*:%e-install_name only allowed with -dynamiclib} \
 243      %{keep_private_externs} \
 244      %{private_bundle} \
 245     } \
 246    %{Zdynamiclib: -dylib \
 247      %{Zbundle:%e-bundle not allowed with -dynamiclib} \
 248      %{Zbundle_loader*:%e-bundle_loader not allowed with -dynamiclib} \
 249      %{client_name*:%e-client_name not allowed with -dynamiclib} \
 250      %{compatibility_version*:-dylib_compatibility_version %*} \
 251      %{current_version*:-dylib_current_version %*} \
 252      %{Zforce_cpusubtype_ALL:-arch %(darwin_arch)} \
 253      %{!Zforce_cpusubtype_ALL: -arch %(darwin_subarch)} \
 254      %{Zforce_flat_namespace:%e-force_flat_namespace not allowed with -dynamiclib} \
 255      %{Zinstall_name*:-dylib_install_name %*} \
 256      %{keep_private_externs:%e-keep_private_externs not allowed with -dynamiclib} \
 257      %{private_bundle:%e-private_bundle not allowed with -dynamiclib} \
 258     } \
 259    %{Zall_load:-all_load} \
 260    %{Zallowable_client*:-allowable_client %*} \
 261    %{Zbind_at_load:-bind_at_load} \
 262    %{Zarch_errors_fatal:-arch_errors_fatal} \
 263    %{Zdead_strip:-dead_strip} \
 264    %{Zno_dead_strip_inits_and_terms:-no_dead_strip_inits_and_terms} \
 265    %{Zdylib_file*:-dylib_file %*} \
 266    %{Zdynamic:-dynamic}\
 267    %{Zexported_symbols_list*:-exported_symbols_list %*} \
 268    %{Zflat_namespace:-flat_namespace} \
 269    %{headerpad_max_install_names} \
 270    %{Zimage_base*:-image_base %*} \
 271    %{Zinit*:-init %*} \
 272    %{!mmacosx-version-min=*:-macosx_version_min %(darwin_minversion)} \
 273    %{mmacosx-version-min=*:-macosx_version_min %*} \
 274    %{nomultidefs} \
 275    %{Zmulti_module:-multi_module} %{Zsingle_module:-single_module} \
 276    %{Zmultiply_defined*:-multiply_defined %*} \
 277    %{!Zmultiply_defined*:%{shared-libgcc: \
 278      %:version-compare(< 10.5 mmacosx-version-min= -multiply_defined) \
 279      %:version-compare(< 10.5 mmacosx-version-min= suppress)}} \
 280    %{Zmultiplydefinedunused*:-multiply_defined_unused %*} \
 281    " PIE_SPEC " \
 282    %{prebind} %{noprebind} %{nofixprebinding} %{prebind_all_twolevel_modules} \
 283    %{read_only_relocs} \
 284    %{sectcreate*} %{sectorder*} %{seg1addr*} %{segprot*} \
 285    %{Zsegaddr*:-segaddr %*} \
 286    %{Zsegs_read_only_addr*:-segs_read_only_addr %*} \
 287    %{Zsegs_read_write_addr*:-segs_read_write_addr %*} \
 288    %{Zseg_addr_table*: -seg_addr_table %*} \
 289    %{Zfn_seg_addr_table_filename*:-seg_addr_table_filename %*} \
 290    %{sub_library*} %{sub_umbrella*} \
 291    " LINK_SYSROOT_SPEC " \
 292    %{twolevel_namespace} %{twolevel_namespace_hints} \
 293    %{Zumbrella*: -umbrella %*} \
 294    %{undefined*} \
 295    %{Zunexported_symbols_list*:-unexported_symbols_list %*} \
 296    %{Zweak_reference_mismatches*:-weak_reference_mismatches %*} \
 297    %{!Zweak_reference_mismatches*:-weak_reference_mismatches non-weak} \
 298    %{X} \
 299    %{y*} \
 300    %{w} \
 301    %{pagezero_size*} %{segs_read_*} %{seglinkedit} %{noseglinkedit}  \
 302    %{sectalign*} %{sectobjectsymbols*} %{segcreate*} %{whyload} \
 303    %{whatsloaded} %{dylinker_install_name*} \
 304    %{dylinker} %{Mach} "
 305
 306
 307 /* Machine dependent libraries.  */
 308
 309 #define LIB_SPEC "%{!static:-lSystem}"
 310
 311 /* Support -mmacosx-version-min by supplying different (stub) libgcc_s.dylib
 312    libraries to link against, and by not linking against libgcc_s on
 313    earlier-than-10.3.9.
 314
 315    Note that by default, -lgcc_eh is not linked against!  This is
 316    because in a future version of Darwin the EH frame information may
 317    be in a new format, or the fallback routine might be changed; if
 318    you want to explicitly link against the static version of those
 319    routines, because you know you don't need to unwind through system
 320    libraries, you need to explicitly say -static-libgcc.
 321
 322    If it is linked against, it has to be before -lgcc, because it may
 323    need symbols from -lgcc.  */
 324 #undef REAL_LIBGCC_SPEC
 325 #define REAL_LIBGCC_SPEC                                                   \
 326    "%{static-libgcc|static: -lgcc_eh -lgcc;                                \
 327       shared-libgcc|fexceptions|fgnu-runtime:                              \
 328        %:version-compare(!> 10.5 mmacosx-version-min= -lgcc_s.10.4)        \
 329        %:version-compare(>< 10.5 10.6 mmacosx-version-min= -lgcc_s.10.5)   \
 330        %:version-compare(!> 10.5 mmacosx-version-min= -lgcc_ext.10.4)      \
 331        %:version-compare(>= 10.5 mmacosx-version-min= -lgcc_ext.10.5)      \
 332        -lgcc ;                                                             \
 333       :%:version-compare(>< 10.3.9 10.5 mmacosx-version-min= -lgcc_s.10.4) \
 334        %:version-compare(>< 10.5 10.6 mmacosx-version-min= -lgcc_s.10.5)   \
 335        %:version-compare(!> 10.5 mmacosx-version-min= -lgcc_ext.10.4)      \
 336        %:version-compare(>= 10.5 mmacosx-version-min= -lgcc_ext.10.5)      \
 337        -lgcc }"
 338
 339 /* We specify crt0.o as -lcrt0.o so that ld will search the library path.
 340
 341    crt3.o provides __cxa_atexit on systems that don't have it.  Since
 342    it's only used with C++, which requires passing -shared-libgcc, key
 343    off that to avoid unnecessarily adding a destructor to every
 344    powerpc program built.  */
 345
 346 #undef  STARTFILE_SPEC
 347 #define STARTFILE_SPEC                                                      \
 348   "%{Zdynamiclib: %(darwin_dylib1) %{fgnu-tm: -lcrttms.o}}                  \
 349    %{!Zdynamiclib:%{Zbundle:%{!static:                                      \
 350         %:version-compare(< 10.6 mmacosx-version-min= -lbundle1.o)          \
 351         %{fgnu-tm: -lcrttms.o}}}                                            \
 352      %{!Zbundle:%{pg:%{static:-lgcrt0.o}                                    \
 353                      %{!static:%{object:-lgcrt0.o}                          \
 354                                %{!object:%{preload:-lgcrt0.o}               \
 355                                  %{!preload:-lgcrt1.o                       \
 356                                  %:version-compare(>= 10.8 mmacosx-version-min= -no_new_main) \
 357                                  %(darwin_crt2)}}}}    \
 358                 %{!pg:%{static:-lcrt0.o}                                    \
 359                       %{!static:%{object:-lcrt0.o}                          \
 360                                 %{!object:%{preload:-lcrt0.o}               \
 361                                   %{!preload: %(darwin_crt1)                \
 362                                               %(darwin_crt2)}}}}}}          \
 363   %{shared-libgcc:%:version-compare(< 10.5 mmacosx-version-min= crt3.o%s)}"
 364
 365 /* We want a destructor last in the list.  */
 366 #define ENDFILE_SPEC "%{fgnu-tm: -lcrttme.o}"
 367
 368 #define DARWIN_EXTRA_SPECS                                              \
 369   { "darwin_crt1", DARWIN_CRT1_SPEC },                                  \
 370   { "darwin_dylib1", DARWIN_DYLIB1_SPEC },                              \
 371   { "darwin_minversion", DARWIN_MINVERSION_SPEC },
 372
 373 #define DARWIN_DYLIB1_SPEC                                              \
 374   "%:version-compare(!> 10.5 mmacosx-version-min= -ldylib1.o)           \
 375    %:version-compare(>< 10.5 10.6 mmacosx-version-min= -ldylib1.10.5.o)"
 376
 377 #define DARWIN_CRT1_SPEC                                                \
 378   "%:version-compare(!> 10.5 mmacosx-version-min= -lcrt1.o)             \
 379    %:version-compare(>< 10.5 10.6 mmacosx-version-min= -lcrt1.10.5.o)   \
 380    %:version-compare(>< 10.6 10.8 mmacosx-version-min= -lcrt1.10.6.o)   \
 381    %{fgnu-tm: -lcrttms.o}"
 382
 383 /* Default Darwin ASM_SPEC, very simple.  */
 384 #define ASM_SPEC "-arch %(darwin_arch) \
 385   %{Zforce_cpusubtype_ALL:-force_cpusubtype_ALL} \
 386   %{static}"
 387
 388 /* Default ASM_DEBUG_SPEC.  Darwin's as cannot currently produce dwarf
 389    debugging data.  */
 390
 391 #define ASM_DEBUG_SPEC  "%{g*:%{!g0:%{!gdwarf*:--gstabs}}}"
 392
 393 /* We still allow output of STABS.  */
 394
 395 #define DBX_DEBUGGING_INFO 1
 396
 397 #define DWARF2_DEBUGGING_INFO 1
 398 #define PREFERRED_DEBUGGING_TYPE DBX_DEBUG
 399
 400 #define DEBUG_FRAME_SECTION     "__DWARF,__debug_frame,regular,debug"
 401 #define DEBUG_INFO_SECTION      "__DWARF,__debug_info,regular,debug"
 402 #define DEBUG_ABBREV_SECTION    "__DWARF,__debug_abbrev,regular,debug"
 403 #define DEBUG_ARANGES_SECTION   "__DWARF,__debug_aranges,regular,debug"
 404 #define DEBUG_MACINFO_SECTION   "__DWARF,__debug_macinfo,regular,debug"
 405 #define DEBUG_LINE_SECTION      "__DWARF,__debug_line,regular,debug"
 406 #define DEBUG_LOC_SECTION       "__DWARF,__debug_loc,regular,debug"
 407 #define DEBUG_PUBNAMES_SECTION  "__DWARF,__debug_pubnames,regular,debug"
 408 #define DEBUG_PUBTYPES_SECTION  "__DWARF,__debug_pubtypes,regular,debug"
 409 #define DEBUG_STR_SECTION       "__DWARF,__debug_str,regular,debug"
 410 #define DEBUG_RANGES_SECTION    "__DWARF,__debug_ranges,regular,debug"
 411 #define DEBUG_MACRO_SECTION    "__DWARF,__debug_macro,regular,debug"
 412
 413 #define TARGET_WANT_DEBUG_PUB_SECTIONS true
 414
 415 #define TARGET_FORCE_AT_COMP_DIR true
 416
 417 /* When generating stabs debugging, use N_BINCL entries.  */
 418
 419 #define DBX_USE_BINCL
 420
 421 /* There is no limit to the length of stabs strings.  */
 422
 423 #define DBX_CONTIN_LENGTH 0
 424
 425 /* gdb needs a null N_SO at the end of each file for scattered loading.  */
 426
 427 #define DBX_OUTPUT_NULL_N_SO_AT_MAIN_SOURCE_FILE_END
 428
 429 /* GCC's definition of 'one_only' is the same as its definition of 'weak'.  */
 430 #define MAKE_DECL_ONE_ONLY(DECL) (DECL_WEAK (DECL) = 1)
 431
 432 /* Mach-O supports 'weak imports', and 'weak definitions' in coalesced
 433    sections.  machopic_select_section ensures that weak variables go in
 434    coalesced sections.  Weak aliases (or any other kind of aliases) are
 435    not supported.  Weak symbols that aren't visible outside the .s file
 436    are not supported.  */
 437 #define ASM_WEAKEN_DECL(FILE, DECL, NAME, ALIAS)                        \
 438   do {                                                                  \
 439     if (ALIAS)                                                          \
 440       {                                                                 \
 441         warning (0, "alias definitions not supported in Mach-O; ignored");      \
 442         break;                                                          \
 443       }                                                                 \
 444                                                                         \
 445     if (! DECL_EXTERNAL (DECL) && TREE_PUBLIC (DECL))                   \
 446       targetm.asm_out.globalize_label (FILE, NAME);                     \
 447     if (DECL_EXTERNAL (DECL))                                           \
 448       fputs ("\t.weak_reference ", FILE);                               \
 449     else if (lookup_attribute ("weak_import", DECL_ATTRIBUTES (DECL)))  \
 450       break;                                                            \
 451     else if (TREE_PUBLIC (DECL))                                        \
 452       fputs ("\t.weak_definition ", FILE);                              \
 453     else                                                                \
 454       break;                                                            \
 455     assemble_name (FILE, NAME);                                         \
 456     fputc ('\n', FILE);                                                 \
 457   } while (0)
 458
 459 /* Darwin has the pthread routines in libSystem, which every program
 460    links to, so there's no need for weak-ness for that.  */
 461 #define GTHREAD_USE_WEAK 0
 462
 463 /* The Darwin linker doesn't want coalesced symbols to appear in
 464    a static archive's table of contents. */
 465 #undef TARGET_WEAK_NOT_IN_ARCHIVE_TOC
 466 #define TARGET_WEAK_NOT_IN_ARCHIVE_TOC 1
 467
 468 /* On Darwin, we don't (at the time of writing) have linkonce sections
 469    with names, so it's safe to make the class data not comdat.  */
 470 #define TARGET_CXX_CLASS_DATA_ALWAYS_COMDAT hook_bool_void_false
 471
 472 /* For efficiency, on Darwin the RTTI information that is always
 473    emitted in the standard C++ library should not be COMDAT.  */
 474 #define TARGET_CXX_LIBRARY_RTTI_COMDAT hook_bool_void_false
 475
 476 /* We make exception information linkonce. */
 477 #undef TARGET_USES_WEAK_UNWIND_INFO
 478 #define TARGET_USES_WEAK_UNWIND_INFO 1
 479
 480 /* We need to use a nonlocal label for the start of an EH frame: the
 481    Darwin linker requires that a coalesced section start with a label.
 482    Unfortunately, it also requires that 'debug' sections don't contain
 483    labels.  */
 484 #undef FRAME_BEGIN_LABEL
 485 #define FRAME_BEGIN_LABEL (for_eh ? "EH_frame" : "Lframe")
 486
 487 /* Emit a label for the FDE corresponding to DECL.  EMPTY means
 488    emit a label for an empty FDE. */
 489 #define TARGET_ASM_EMIT_UNWIND_LABEL darwin_emit_unwind_label
 490
 491 /* Emit a label to separate the exception table.  */
 492 #define TARGET_ASM_EMIT_EXCEPT_TABLE_LABEL darwin_emit_except_table_label
 493
 494 /* Our profiling scheme doesn't LP labels and counter words.  */
 495
 496 #define NO_PROFILE_COUNTERS     1
 497
 498 #undef  INIT_SECTION_ASM_OP
 499 #define INIT_SECTION_ASM_OP
 500
 501 #undef  INVOKE__main
 502
 503 #define TARGET_ASM_CONSTRUCTOR  machopic_asm_out_constructor
 504 #define TARGET_ASM_DESTRUCTOR   machopic_asm_out_destructor
 505
 506 /* Always prefix with an underscore.  */
 507
 508 #define USER_LABEL_PREFIX "_"
 509
 510 /* A dummy symbol that will be replaced with the function base name.  */
 511 #define MACHOPIC_FUNCTION_BASE_NAME "<pic base>"
 512
 513 /* Don't output a .file directive.  That is only used by the assembler for
 514    error reporting.  */
 515 #undef  TARGET_ASM_FILE_START_FILE_DIRECTIVE
 516 #define TARGET_ASM_FILE_START_FILE_DIRECTIVE false
 517
 518 #undef  TARGET_ASM_FILE_END
 519 #define TARGET_ASM_FILE_END darwin_file_end
 520
 521 /* Because Mach-O relocations have a counter from 1 to 255 for the
 522    section number they apply to, it is necessary to output all
 523    normal sections before the LTO sections, to make sure that the
 524    sections that may have relocations always have a section number
 525    smaller than 255.  */
 526 #undef  TARGET_ASM_LTO_START
 527 #define TARGET_ASM_LTO_START darwin_asm_lto_start
 528 #undef  TARGET_ASM_LTO_END
 529 #define TARGET_ASM_LTO_END darwin_asm_lto_end
 530
 531 #define ASM_OUTPUT_SKIP(FILE,SIZE)  \
 532   fprintf (FILE, "\t.space "HOST_WIDE_INT_PRINT_UNSIGNED"\n", SIZE)
 533
 534 /* Give ObjC methods pretty symbol names.  */
 535
 536 #undef  OBJC_GEN_METHOD_LABEL
 537 #define OBJC_GEN_METHOD_LABEL(BUF,IS_INST,CLASS_NAME,CAT_NAME,SEL_NAME,NUM) \
 538   do { if (CAT_NAME)                                                    \
 539          sprintf (BUF, "%c[%s(%s) %s]", (IS_INST) ? '-' : '+',          \
 540                   (CLASS_NAME), (CAT_NAME), (SEL_NAME));                \
 541        else                                                             \
 542          sprintf (BUF, "%c[%s %s]", (IS_INST) ? '-' : '+',              \
 543                   (CLASS_NAME), (SEL_NAME));                            \
 544      } while (0)
 545
 546 #undef ASM_DECLARE_OBJECT_NAME
 547 #define ASM_DECLARE_OBJECT_NAME(FILE, NAME, DECL) \
 548         darwin_asm_declare_object_name ((FILE), (NAME), (DECL))
 549
 550 /* The RTTI data (e.g., __ti4name) is common and public (and static),
 551    but it does need to be referenced via indirect PIC data pointers.
 552    The machopic_define_symbol calls are telling the machopic subsystem
 553    that the name *is* defined in this module, so it doesn't need to
 554    make them indirect.  */
 555
 556 #define ASM_DECLARE_FUNCTION_NAME(FILE, NAME, DECL)                     \
 557   do {                                                                  \
 558     const char *xname = NAME;                                           \
 559     if (GET_CODE (XEXP (DECL_RTL (DECL), 0)) != SYMBOL_REF)             \
 560       xname = IDENTIFIER_POINTER (DECL_NAME (DECL));                    \
 561     if (! DECL_WEAK (DECL)                                              \
 562         && ((TREE_STATIC (DECL)                                         \
 563              && (!DECL_COMMON (DECL) || !TREE_PUBLIC (DECL)))           \
 564             || DECL_INITIAL (DECL)))                                    \
 565         machopic_define_symbol (DECL_RTL (DECL));                       \
 566     if ((TREE_STATIC (DECL)                                             \
 567          && (!DECL_COMMON (DECL) || !TREE_PUBLIC (DECL)))               \
 568         || DECL_INITIAL (DECL))                                         \
 569       (* targetm.encode_section_info) (DECL, DECL_RTL (DECL), false);   \
 570     ASM_OUTPUT_FUNCTION_LABEL (FILE, xname, DECL);                      \
 571   } while (0)
 572
 573 #undef TARGET_ASM_DECLARE_CONSTANT_NAME
 574 #define TARGET_ASM_DECLARE_CONSTANT_NAME darwin_asm_declare_constant_name
 575
 576 /* Wrap new method names in quotes so the assembler doesn't gag.
 577    Make Objective-C internal symbols local and in doing this, we need
 578    to accommodate the name mangling done by c++ on file scope locals.  */
 579
 580 int darwin_label_is_anonymous_local_objc_name (const char *name);
 581
 582 #undef  ASM_OUTPUT_LABELREF
 583 #define ASM_OUTPUT_LABELREF(FILE,NAME)                                       \
 584   do {                                                                       \
 585        const char *xname = (NAME);                                           \
 586        if (! strcmp (xname, MACHOPIC_FUNCTION_BASE_NAME))                    \
 587          machopic_output_function_base_name(FILE);                           \
 588        else if (xname[0] == '&' || xname[0] == '*')                          \
 589          {                                                                   \
 590            int len = strlen (xname);                                         \
 591            if (len > 6 && !strcmp ("$stub", xname + len - 5))                \
 592              machopic_validate_stub_or_non_lazy_ptr (xname);                 \
 593            else if (len > 7 && !strcmp ("$stub\"", xname + len - 6))         \
 594              machopic_validate_stub_or_non_lazy_ptr (xname);                 \
 595            else if (len > 14 && !strcmp ("$non_lazy_ptr", xname + len - 13)) \
 596              machopic_validate_stub_or_non_lazy_ptr (xname);                 \
 597            else if (len > 15 && !strcmp ("$non_lazy_ptr\"", xname + len - 14)) \
 598              machopic_validate_stub_or_non_lazy_ptr (xname);                 \
 599            if (xname[1] != '"' && name_needs_quotes (&xname[1]))             \
 600              fprintf (FILE, "\"%s\"", &xname[1]);                            \
 601            else                                                              \
 602              fputs (&xname[1], FILE);                                        \
 603          }                                                                   \
 604        else if (xname[0] == '+' || xname[0] == '-')                          \
 605          fprintf (FILE, "\"%s\"", xname);                                    \
 606        else if (darwin_label_is_anonymous_local_objc_name (xname))           \
 607          fprintf (FILE, "L%s", xname);                                       \
 608        else if (xname[0] != '"' && name_needs_quotes (xname))                \
 609          asm_fprintf (FILE, "\"%U%s\"", xname);                              \
 610        else                                                                  \
 611          asm_fprintf (FILE, "%U%s", xname);                                  \
 612   } while (0)
 613
 614 /* Output before executable code.  */
 615 #undef TEXT_SECTION_ASM_OP
 616 #define TEXT_SECTION_ASM_OP "\t.text"
 617
 618 /* Output before writable data.  */
 619
 620 #undef DATA_SECTION_ASM_OP
 621 #define DATA_SECTION_ASM_OP "\t.data"
 622
 623 #undef  ALIGN_ASM_OP
 624 #define ALIGN_ASM_OP            ".align"
 625
 626 #undef  ASM_OUTPUT_ALIGN
 627 #define ASM_OUTPUT_ALIGN(FILE,LOG)      \
 628   if ((LOG) != 0)                       \
 629     fprintf (FILE, "\t%s\t%d\n", ALIGN_ASM_OP, (LOG))
 630
 631 /* The maximum alignment which the object file format can support in
 632    bits.  For Mach-O, this is 2^15 bytes.  */
 633
 634 #undef  MAX_OFILE_ALIGNMENT
 635 #define MAX_OFILE_ALIGNMENT (0x8000 * 8)
 636
 637 #define L2_MAX_OFILE_ALIGNMENT 15
 638
 639 /*  These are the three variants that emit referenced blank space.  */
 640 #define ASM_OUTPUT_ALIGNED_BSS(FILE, DECL, NAME, SIZE, ALIGN)           \
 641         darwin_output_aligned_bss ((FILE), (DECL), (NAME), (SIZE), (ALIGN))
 642
 643 #undef  ASM_OUTPUT_ALIGNED_DECL_LOCAL
 644 #define ASM_OUTPUT_ALIGNED_DECL_LOCAL(FILE, DECL, NAME, SIZE, ALIGN)    \
 645         darwin_asm_output_aligned_decl_local                            \
 646                                   ((FILE), (DECL), (NAME), (SIZE), (ALIGN))
 647
 648 #undef  ASM_OUTPUT_ALIGNED_DECL_COMMON
 649 #define ASM_OUTPUT_ALIGNED_DECL_COMMON(FILE, DECL, NAME, SIZE, ALIGN)   \
 650         darwin_asm_output_aligned_decl_common                           \
 651                                    ((FILE), (DECL), (NAME), (SIZE), (ALIGN))
 652
 653 /* The generic version, archs should over-ride where required.  */
 654 #define MACHOPIC_NL_SYMBOL_PTR_SECTION ".non_lazy_symbol_pointer"
 655
 656 /* Declare the section variables.  */
 657 #ifndef USED_FOR_TARGET
 658 enum darwin_section_enum {
 659 #define DEF_SECTION(NAME, FLAGS, DIRECTIVE, OBJC) NAME,
 660 #include "darwin-sections.def"
 661 #undef DEF_SECTION
 662   NUM_DARWIN_SECTIONS
 663 };
 664 extern GTY(()) section * darwin_sections[NUM_DARWIN_SECTIONS];
 665 #endif
 666
 667 #undef  TARGET_ASM_SELECT_SECTION
 668 #define TARGET_ASM_SELECT_SECTION machopic_select_section
 669
 670 #undef  TARGET_ASM_FUNCTION_SECTION
 671 #define TARGET_ASM_FUNCTION_SECTION darwin_function_section
 672
 673 #undef  TARGET_ASM_FUNCTION_SWITCHED_TEXT_SECTIONS
 674 #define TARGET_ASM_FUNCTION_SWITCHED_TEXT_SECTIONS \
 675         darwin_function_switched_text_sections
 676
 677 #undef  TARGET_ASM_SELECT_RTX_SECTION
 678 #define TARGET_ASM_SELECT_RTX_SECTION machopic_select_rtx_section
 679 #undef  TARGET_ASM_UNIQUE_SECTION
 680 #define TARGET_ASM_UNIQUE_SECTION darwin_unique_section
 681 #undef  TARGET_ASM_FUNCTION_RODATA_SECTION
 682 #define TARGET_ASM_FUNCTION_RODATA_SECTION default_no_function_rodata_section
 683
 684 #undef  TARGET_ASM_TM_CLONE_TABLE_SECTION
 685 #define TARGET_ASM_TM_CLONE_TABLE_SECTION darwin_tm_clone_table_section
 686
 687 #undef  TARGET_ASM_RELOC_RW_MASK
 688 #define TARGET_ASM_RELOC_RW_MASK machopic_reloc_rw_mask
 689
 690 /* Globalizing directive for a label.  */
 691 #define GLOBAL_ASM_OP "\t.globl "
 692 #define TARGET_ASM_GLOBALIZE_LABEL darwin_globalize_label
 693
 694 /* Emit an assembler directive to set visibility for a symbol.  Used
 695    to support visibility attribute and Darwin's private extern
 696    feature.  */
 697 #undef TARGET_ASM_ASSEMBLE_VISIBILITY
 698 #define TARGET_ASM_ASSEMBLE_VISIBILITY darwin_assemble_visibility
 699
 700 /* Extra attributes for Darwin.  */
 701 #define SUBTARGET_ATTRIBUTE_TABLE                                            \
 702   /* { name, min_len, max_len, decl_req, type_req, fn_type_req, handler,     \
 703        affects_type_identity } */                                                    \
 704   { "apple_kext_compatibility", 0, 0, false, true, false,                    \
 705     darwin_handle_kext_attribute, false },                                   \
 706   { "weak_import", 0, 0, true, false, false,                                 \
 707     darwin_handle_weak_import_attribute, false }
 708
 709 #undef ASM_GENERATE_INTERNAL_LABEL
 710 #define ASM_GENERATE_INTERNAL_LABEL(LABEL,PREFIX,NUM)   \
 711   sprintf (LABEL, "*%s%ld", PREFIX, (long)(NUM))
 712
 713 #undef TARGET_ASM_MARK_DECL_PRESERVED
 714 #define TARGET_ASM_MARK_DECL_PRESERVED darwin_mark_decl_preserved
 715
 716 /* Set on a symbol with SYMBOL_FLAG_FUNCTION or
 717    MACHO_SYMBOL_FLAG_VARIABLE to indicate that the function or
 718    variable has been defined in this translation unit.
 719    When porting Mach-O to new architectures you need to make
 720    sure these aren't clobbered by the backend.  */
 721
 722 #define MACHO_SYMBOL_FLAG_VARIABLE (SYMBOL_FLAG_MACH_DEP)
 723 #define MACHO_SYMBOL_FLAG_DEFINED ((SYMBOL_FLAG_MACH_DEP) << 1)
 724
 725 /* Set on a symbol to indicate when fix-and-continue style code
 726    generation is being used and the symbol refers to a static symbol
 727    that should be rebound from new instances of a translation unit to
 728    the original instance of the data.  */
 729
 730 #define MACHO_SYMBOL_STATIC ((SYMBOL_FLAG_MACH_DEP) << 2)
 731
 732 /* Symbolic names for various things we might know about a symbol.  */
 733
 734 enum machopic_addr_class {
 735   MACHOPIC_UNDEFINED,
 736   MACHOPIC_DEFINED_DATA,
 737   MACHOPIC_UNDEFINED_DATA,
 738   MACHOPIC_DEFINED_FUNCTION,
 739   MACHOPIC_UNDEFINED_FUNCTION
 740 };
 741
 742 /* Macros defining the various PIC cases.  */
 743
 744 #undef  MACHO_DYNAMIC_NO_PIC_P
 745 #define MACHO_DYNAMIC_NO_PIC_P  (TARGET_MACHO_DYNAMIC_NO_PIC)
 746 #undef  MACHOPIC_INDIRECT
 747 #define MACHOPIC_INDIRECT       (flag_pic || MACHO_DYNAMIC_NO_PIC_P)
 748 #define MACHOPIC_JUST_INDIRECT  (MACHO_DYNAMIC_NO_PIC_P)
 749 #undef  MACHOPIC_PURE
 750 #define MACHOPIC_PURE           (flag_pic && ! MACHO_DYNAMIC_NO_PIC_P)
 751
 752 #undef TARGET_ENCODE_SECTION_INFO
 753 #define TARGET_ENCODE_SECTION_INFO  darwin_encode_section_info
 754 #undef TARGET_STRIP_NAME_ENCODING
 755 #define TARGET_STRIP_NAME_ENCODING  default_strip_name_encoding
 756
 757 #define GEN_BINDER_NAME_FOR_STUB(BUF,STUB,STUB_LENGTH)          \
 758   do {                                                          \
 759     const char *const stub_ = (STUB);                           \
 760     char *buffer_ = (BUF);                                      \
 761     strcpy (buffer_, stub_);                                    \
 762     if (stub_[0] == '"')                                        \
 763       {                                                         \
 764         strcpy (buffer_ + (STUB_LENGTH) - 1, "_binder\"");      \
 765       }                                                         \
 766     else                                                        \
 767       {                                                         \
 768         strcpy (buffer_ + (STUB_LENGTH), "_binder");            \
 769       }                                                         \
 770   } while (0)
 771
 772 #define GEN_SYMBOL_NAME_FOR_SYMBOL(BUF,SYMBOL,SYMBOL_LENGTH)    \
 773   do {                                                          \
 774     const char *const symbol_ = (SYMBOL);                       \
 775     char *buffer_ = (BUF);                                      \
 776     if (name_needs_quotes (symbol_) && symbol_[0] != '"')       \
 777       {                                                         \
 778           sprintf (buffer_, "\"%s\"", symbol_);                 \
 779       }                                                         \
 780     else                                                        \
 781       {                                                         \
 782         strcpy (buffer_, symbol_);                              \
 783       }                                                         \
 784   } while (0)
 785
 786 /* Given a symbol name string, create the lazy pointer version
 787    of the symbol name.  */
 788
 789 #define GEN_LAZY_PTR_NAME_FOR_SYMBOL(BUF,SYMBOL,SYMBOL_LENGTH)  \
 790   do {                                                          \
 791     const char *symbol_ = (SYMBOL);                             \
 792     char *buffer_ = (BUF);                                      \
 793     if (symbol_[0] == '"')                                      \
 794       {                                                         \
 795         strcpy (buffer_, "\"L");                                \
 796         strcpy (buffer_ + 2, symbol_ + 1);                      \
 797         strcpy (buffer_ + (SYMBOL_LENGTH), "$lazy_ptr\"");      \
 798       }                                                         \
 799     else if (name_needs_quotes (symbol_))                       \
 800       {                                                         \
 801         strcpy (buffer_, "\"L");                                \
 802         strcpy (buffer_ + 2, symbol_);                          \
 803         strcpy (buffer_ + (SYMBOL_LENGTH) + 2, "$lazy_ptr\"");  \
 804       }                                                         \
 805     else                                                        \
 806       {                                                         \
 807         strcpy (buffer_, "L");                                  \
 808         strcpy (buffer_ + 1, symbol_);                          \
 809         strcpy (buffer_ + (SYMBOL_LENGTH) + 1, "$lazy_ptr");    \
 810       }                                                         \
 811   } while (0)
 812
 813 #define EH_FRAME_SECTION_NAME   "__TEXT"
 814 #define EH_FRAME_SECTION_ATTR ",coalesced,no_toc+strip_static_syms+live_support"
 815
 816 /* Java runtime class list.  */
 817 #define JCR_SECTION_NAME "__DATA,jcr,regular,no_dead_strip"
 818
 819 #undef ASM_PREFERRED_EH_DATA_FORMAT
 820 #define ASM_PREFERRED_EH_DATA_FORMAT(CODE,GLOBAL)  \
 821   (((CODE) == 2 && (GLOBAL) == 1) \
 822    ? (DW_EH_PE_pcrel | DW_EH_PE_indirect | DW_EH_PE_sdata4) : \
 823      ((CODE) == 1 || (GLOBAL) == 0) ? DW_EH_PE_pcrel : DW_EH_PE_absptr)
 824
 825 #define ASM_OUTPUT_DWARF_DELTA(FILE,SIZE,LABEL1,LABEL2)  \
 826   darwin_asm_output_dwarf_delta (FILE, SIZE, LABEL1, LABEL2)
 827
 828 #define ASM_OUTPUT_DWARF_OFFSET(FILE,SIZE,LABEL,BASE)  \
 829   darwin_asm_output_dwarf_offset (FILE, SIZE, LABEL, BASE)
 830
 831 #define ASM_MAYBE_OUTPUT_ENCODED_ADDR_RTX(ASM_OUT_FILE, ENCODING, SIZE, ADDR, DONE)     \
 832       if (ENCODING == ASM_PREFERRED_EH_DATA_FORMAT (2, 1)) {                            \
 833         darwin_non_lazy_pcrel (ASM_OUT_FILE, ADDR);                                     \
 834         goto DONE;                                                                      \
 835       }
 836
 837 /* Experimentally, putting jump tables in text is faster on SPEC.
 838    Also this is needed for correctness for coalesced functions.  */
 839
 840 #ifndef JUMP_TABLES_IN_TEXT_SECTION
 841 #define JUMP_TABLES_IN_TEXT_SECTION 1
 842 #endif
 843
 844 #define TARGET_TERMINATE_DW2_EH_FRAME_INFO false
 845
 846 #define TARGET_ASM_INIT_SECTIONS darwin_init_sections
 847 #undef TARGET_ASM_NAMED_SECTION
 848 #define TARGET_ASM_NAMED_SECTION darwin_asm_named_section
 849
 850 #define DARWIN_REGISTER_TARGET_PRAGMAS()                        \
 851   do {                                                          \
 852     if (!flag_preprocess_only)                                  \
 853       cpp_register_pragma (parse_in, NULL, "mark",              \
 854                            darwin_pragma_ignore, false);        \
 855     c_register_pragma (0, "options", darwin_pragma_options);    \
 856     c_register_pragma (0, "segment", darwin_pragma_ignore);     \
 857     c_register_pragma (0, "unused", darwin_pragma_unused);      \
 858     c_register_pragma (0, "ms_struct", darwin_pragma_ms_struct); \
 859   } while (0)
 860
 861 #undef ASM_APP_ON
 862 #define ASM_APP_ON ""
 863 #undef ASM_APP_OFF
 864 #define ASM_APP_OFF ""
 865
 866 void darwin_register_frameworks (const char *, const char *, int);
 867 void darwin_register_objc_includes (const char *, const char *, int);
 868 #define TARGET_EXTRA_PRE_INCLUDES darwin_register_objc_includes
 869 #define TARGET_EXTRA_INCLUDES darwin_register_frameworks
 870
 871 void add_framework_path (char *);
 872 #define TARGET_OPTF add_framework_path
 873
 874 #define TARGET_POSIX_IO
 875
 876 /* All new versions of Darwin have C99 functions.  */
 877
 878 #define TARGET_C99_FUNCTIONS 1
 879
 880 #define WINT_TYPE "int"
 881
 882 /* Every program on darwin links against libSystem which contains the pthread
 883    routines, so there's no need to explicitly call out when doing threaded
 884    work.  */
 885
 886 #undef GOMP_SELF_SPECS
 887 #define GOMP_SELF_SPECS ""
 888 #undef GTM_SELF_SPECS
 889 #define GTM_SELF_SPECS ""
 890
 891 /* Darwin disables section anchors by default.
 892    They should be enabled per arch where support exists in that arch.  */
 893 #define TARGET_ASM_OUTPUT_ANCHOR NULL
 894 #define DARWIN_SECTION_ANCHORS 0
 895
 896 #define HAVE_ENABLE_EXECUTE_STACK
 897
 898 /* For Apple KEXTs, we make the constructors return this to match gcc
 899    2.95.  */
 900 #define TARGET_CXX_CDTOR_RETURNS_THIS (darwin_kextabi_p)
 901 #define TARGET_KEXTABI flag_apple_kext
 902
 903 /* We have target-specific builtins.  */
 904 #define SUBTARGET_FOLD_BUILTIN darwin_fold_builtin
 905
 906 #define TARGET_N_FORMAT_TYPES 1
 907 #define TARGET_FORMAT_TYPES darwin_additional_format_types
 908
 909 #ifndef USED_FOR_TARGET
 910 extern void darwin_driver_init (unsigned int *,struct cl_decoded_option **);
 911 #define GCC_DRIVER_HOST_INITIALIZATION \
 912   darwin_driver_init (&decoded_options_count, &decoded_options)
 913 #endif
 914
 915 /* The Apple assembler and linker do not support constructor priorities.  */
 916 #undef SUPPORTS_INIT_PRIORITY
 917 #define SUPPORTS_INIT_PRIORITY 0
 918
 919 /* When building cross-compilers (and native crosses) we shall default to
 920    providing an osx-version-min of this unless overridden by the User.  */
 921 #define DEF_MIN_OSX_VERSION "10.4"
 922
 923 #endif /* CONFIG_DARWIN_H */