gcc/config/darwin.h

   1 /* Target definitions for Darwin (Mac OS X) systems.
   2    Copyright (C) 1989, 1990, 1991, 1992, 1993, 2000, 2001, 2002, 2003, 2004,
   3    2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012
   4    Free Software Foundation, Inc.
   5    Contributed by Apple Computer Inc.
   6
   7 This file is part of GCC.
   8
   9 GCC is free software; you can redistribute it and/or modify
  10 it under the terms of the GNU General Public License as published by
  11 the Free Software Foundation; either version 3, or (at your option)
  12 any later version.
  13
  14 GCC is distributed in the hope that it will be useful,
  15 but WITHOUT ANY WARRANTY; without even the implied warranty of
  16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17 GNU General Public License for more details.
  18
  19 Under Section 7 of GPL version 3, you are granted additional
  20 permissions described in the GCC Runtime Library Exception, version
  21 3.1, as published by the Free Software Foundation.
  22
  23 You should have received a copy of the GNU General Public License and
  24 a copy of the GCC Runtime Library Exception along with this program;
  25 see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
  26 <http://www.gnu.org/licenses/>.  */
  27
  28 #ifndef CONFIG_DARWIN_H
  29 #define CONFIG_DARWIN_H
  30
  31 /* The definitions in this file are common to all processor types
  32    running Darwin, which is the kernel for Mac OS X.  Darwin is
  33    basically a BSD user layer laid over a Mach kernel, then evolved
  34    for many years (at NeXT) in parallel with other Unix systems.  So
  35    while the runtime is a somewhat idiosyncratic Mach-based thing,
  36    other definitions look like they would for a BSD variant.  */
  37
  38 /* Although NeXT ran on many different architectures, as of Jan 2001
  39    the only supported Darwin targets are PowerPC and x86.  */
  40
  41 /* One of Darwin's NeXT legacies is the Mach-O format, which is partly
  42    like a.out and partly like COFF, with additional features like
  43    multi-architecture binary support.  */
  44
  45 #define DARWIN_X86 0
  46 #define DARWIN_PPC 0
  47
  48 /* Don't assume anything about the header files.  */
  49 #define NO_IMPLICIT_EXTERN_C
  50
  51 /* Suppress g++ attempt to link in the math library automatically. */
  52 #define MATH_LIBRARY ""
  53
  54 /* We have atexit.  */
  55
  56 #define HAVE_ATEXIT
  57
  58 /* Define an empty body for the function do_global_dtors() in libgcc2.c.  */
  59
  60 #define DO_GLOBAL_DTORS_BODY
  61
  62 /* The string value for __SIZE_TYPE__.  */
  63
  64 #ifndef SIZE_TYPE
  65 #define SIZE_TYPE "long unsigned int"
  66 #endif
  67
  68 /* Type used for ptrdiff_t, as a string used in a declaration.  */
  69
  70 #undef  PTRDIFF_TYPE
  71 #define PTRDIFF_TYPE "int"
  72
  73 /* wchar_t is int.  */
  74
  75 #undef  WCHAR_TYPE
  76 #define WCHAR_TYPE "int"
  77 #undef  WCHAR_TYPE_SIZE
  78 #define WCHAR_TYPE_SIZE 32
  79
  80 #define INT8_TYPE "signed char"
  81 #define INT16_TYPE "short int"
  82 #define INT32_TYPE "int"
  83 #define INT64_TYPE "long long int"
  84 #define UINT8_TYPE "unsigned char"
  85 #define UINT16_TYPE "short unsigned int"
  86 #define UINT32_TYPE "unsigned int"
  87 #define UINT64_TYPE "long long unsigned int"
  88
  89 #define INT_LEAST8_TYPE "signed char"
  90 #define INT_LEAST16_TYPE "short int"
  91 #define INT_LEAST32_TYPE "int"
  92 #define INT_LEAST64_TYPE "long long int"
  93 #define UINT_LEAST8_TYPE "unsigned char"
  94 #define UINT_LEAST16_TYPE "short unsigned int"
  95 #define UINT_LEAST32_TYPE "unsigned int"
  96 #define UINT_LEAST64_TYPE "long long unsigned int"
  97
  98 #define INT_FAST8_TYPE "signed char"
  99 #define INT_FAST16_TYPE "short int"
 100 #define INT_FAST32_TYPE "int"
 101 #define INT_FAST64_TYPE "long long int"
 102 #define UINT_FAST8_TYPE "unsigned char"
 103 #define UINT_FAST16_TYPE "short unsigned int"
 104 #define UINT_FAST32_TYPE "unsigned int"
 105 #define UINT_FAST64_TYPE "long long unsigned int"
 106
 107 #define INTPTR_TYPE "long int"
 108 #define UINTPTR_TYPE "long unsigned int"
 109
 110 #define SIG_ATOMIC_TYPE "int"
 111
 112 /* Default to using the NeXT-style runtime, since that's what is
 113    pre-installed on Darwin systems.  */
 114
 115 #define NEXT_OBJC_RUNTIME 1
 116
 117 /* Don't default to pcc-struct-return, because gcc is the only compiler, and
 118    we want to retain compatibility with older gcc versions.  */
 119
 120 #undef  DEFAULT_PCC_STRUCT_RETURN
 121 #define DEFAULT_PCC_STRUCT_RETURN 0
 122
 123 /* True if pragma ms_struct is in effect.  */
 124 extern GTY(()) int darwin_ms_struct;
 125
 126 #define DRIVER_SELF_SPECS                                       \
 127   "%{gfull:-g -fno-eliminate-unused-debug-symbols} %<gfull",    \
 128   "%{gused:-g -feliminate-unused-debug-symbols} %<gused",       \
 129   "%{fapple-kext|mkernel:-static}",                             \
 130   "%{shared:-Zdynamiclib} %<shared"
 131
 132 #define DARWIN_CC1_SPEC                                                 \
 133   "%{findirect-virtual-calls: -fapple-kext} %<findirect-virtual-calls " \
 134   "%{fterminated-vtables: -fapple-kext} %<fterminated-vtables "         \
 135   "%<filelist* %<framework*"
 136
 137 #define SUBSUBTARGET_OVERRIDE_OPTIONS                                   \
 138   do {                                                                  \
 139     darwin_override_options ();                                         \
 140   } while (0)
 141
 142 #define SUBTARGET_C_COMMON_OVERRIDE_OPTIONS do {                        \
 143     if (flag_mkernel || flag_apple_kext)                                \
 144       {                                                                 \
 145         if (flag_use_cxa_atexit == 2)                                   \
 146           flag_use_cxa_atexit = 0;                                      \
 147         /* kexts should always be built without the coalesced sections  \
 148            because the kernel loader doesn't grok such sections.  */    \
 149         flag_weak = 0;                                                  \
 150         /* No RTTI in kexts.  */                                        \
 151         flag_rtti = 0;                                                  \
 152       }                                                                 \
 153   } while (0)
 154
 155 /* Machine dependent cpp options.  Don't add more options here, add
 156    them to darwin_cpp_builtins in darwin-c.c.  */
 157
 158 #undef  CPP_SPEC
 159 #define CPP_SPEC "%{static:%{!dynamic:-D__STATIC__}}%{!static:-D__DYNAMIC__}" \
 160         " %{pthread:-D_REENTRANT}"
 161
 162 /* This is mostly a clone of the standard LINK_COMMAND_SPEC, plus
 163    precomp, libtool, and fat build additions.
 164
 165    In general, random Darwin linker flags should go into LINK_SPEC
 166    instead of LINK_COMMAND_SPEC.  The command spec is better for
 167    specifying the handling of options understood by generic Unix
 168    linkers, and for positional arguments like libraries.  */
 169
 170 #define LINK_COMMAND_SPEC_A \
 171    "%{!fdump=*:%{!fsyntax-only:%{!c:%{!M:%{!MM:%{!E:%{!S:\
 172     %(linker)" \
 173     LINK_PLUGIN_SPEC \
 174     "%{flto*:%<fcompare-debug*} \
 175     %{flto*} \
 176     %l %X %{s} %{t} %{Z} %{u*} \
 177     %{e*} %{r} \
 178     %{o*}%{!o:-o a.out} \
 179     %{!nostdlib:%{!nostartfiles:%S}} \
 180     %{L*} %(link_libgcc) %o %{fprofile-arcs|fprofile-generate*|coverage:-lgcov} \
 181     %{fopenmp|ftree-parallelize-loops=*: \
 182       %{static|static-libgcc|static-libstdc++|static-libgfortran: libgomp.a%s; : -lgomp } } \
 183     %{fsanitize=address: -framework CoreFoundation -lasan } \
 184     %{fgnu-tm: \
 185       %{static|static-libgcc|static-libstdc++|static-libgfortran: libitm.a%s; : -litm } } \
 186     %{!nostdlib:%{!nodefaultlibs:\
 187       %(link_ssp) %(link_gcc_c_sequence)\
 188     }}\
 189     %{!nostdlib:%{!nostartfiles:%E}} %{T*} %{F*} }}}}}}}"
 190
 191 #define DSYMUTIL "\ndsymutil"
 192
 193 #define DSYMUTIL_SPEC \
 194    "%{!fdump=*:%{!fsyntax-only:%{!c:%{!M:%{!MM:%{!E:%{!S:\
 195     %{v} \
 196     %{gdwarf-2:%{!gstabs*:%{!g0: -idsym}}}\
 197     %{.c|.cc|.C|.cpp|.cp|.c++|.cxx|.CPP|.m|.mm: \
 198     %{gdwarf-2:%{!gstabs*:%{!g0: -dsym}}}}}}}}}}}"
 199
 200 #define LINK_COMMAND_SPEC LINK_COMMAND_SPEC_A DSYMUTIL_SPEC
 201
 202 /* Tell collect2 to run dsymutil for us as necessary.  */
 203 #define COLLECT_RUN_DSYMUTIL 1
 204
 205 /* We only want one instance of %G, since libSystem (Darwin's -lc) does not depend
 206    on libgcc.  */
 207 #undef  LINK_GCC_C_SEQUENCE_SPEC
 208 #define LINK_GCC_C_SEQUENCE_SPEC "%G %L"
 209
 210 #ifdef TARGET_SYSTEM_ROOT
 211 #define LINK_SYSROOT_SPEC \
 212   "%{isysroot*:-syslibroot %*;:-syslibroot " TARGET_SYSTEM_ROOT "}"
 213 #else
 214 #define LINK_SYSROOT_SPEC "%{isysroot*:-syslibroot %*}"
 215 #endif
 216
 217 #define PIE_SPEC "%{fpie|pie|fPIE:}"
 218
 219 /* Please keep the random linker options in alphabetical order (modulo
 220    'Z' and 'no' prefixes). Note that options taking arguments may appear
 221    multiple times on a command line with different arguments each time,
 222    so put a * after their names so all of them get passed.  */
 223 #define LINK_SPEC  \
 224   "%{static}%{!static:-dynamic} \
 225    %:remove-outfile(-ldl) \
 226    %:remove-outfile(-lm) \
 227    %:remove-outfile(-lpthread) \
 228    %{fgnu-runtime: %{static|static-libgcc: \
 229                      %:replace-outfile(-lobjc libobjc-gnu.a%s); \
 230                     :%:replace-outfile(-lobjc -lobjc-gnu ) } }\
 231    %{static|static-libgcc|static-libgfortran:%:replace-outfile(-lgfortran libgfortran.a%s)}\
 232    %{static|static-libgcc|static-libstdc++|static-libgfortran:%:replace-outfile(-lgomp libgomp.a%s)}\
 233    %{static|static-libgcc|static-libstdc++:%:replace-outfile(-lstdc++ libstdc++.a%s)}\
 234    %{!Zdynamiclib: \
 235      %{Zforce_cpusubtype_ALL:-arch %(darwin_arch) -force_cpusubtype_ALL} \
 236      %{!Zforce_cpusubtype_ALL:-arch %(darwin_subarch)} \
 237      %{Zbundle:-bundle} \
 238      %{Zbundle_loader*:-bundle_loader %*} \
 239      %{client_name*} \
 240      %{compatibility_version*:%e-compatibility_version only allowed with -dynamiclib\
 241 } \
 242      %{current_version*:%e-current_version only allowed with -dynamiclib} \
 243      %{Zforce_flat_namespace:-force_flat_namespace} \
 244      %{Zinstall_name*:%e-install_name only allowed with -dynamiclib} \
 245      %{keep_private_externs} \
 246      %{private_bundle} \
 247     } \
 248    %{Zdynamiclib: -dylib \
 249      %{Zbundle:%e-bundle not allowed with -dynamiclib} \
 250      %{Zbundle_loader*:%e-bundle_loader not allowed with -dynamiclib} \
 251      %{client_name*:%e-client_name not allowed with -dynamiclib} \
 252      %{compatibility_version*:-dylib_compatibility_version %*} \
 253      %{current_version*:-dylib_current_version %*} \
 254      %{Zforce_cpusubtype_ALL:-arch %(darwin_arch)} \
 255      %{!Zforce_cpusubtype_ALL: -arch %(darwin_subarch)} \
 256      %{Zforce_flat_namespace:%e-force_flat_namespace not allowed with -dynamiclib} \
 257      %{Zinstall_name*:-dylib_install_name %*} \
 258      %{keep_private_externs:%e-keep_private_externs not allowed with -dynamiclib} \
 259      %{private_bundle:%e-private_bundle not allowed with -dynamiclib} \
 260     } \
 261    %{Zall_load:-all_load} \
 262    %{Zallowable_client*:-allowable_client %*} \
 263    %{Zbind_at_load:-bind_at_load} \
 264    %{Zarch_errors_fatal:-arch_errors_fatal} \
 265    %{Zdead_strip:-dead_strip} \
 266    %{Zno_dead_strip_inits_and_terms:-no_dead_strip_inits_and_terms} \
 267    %{Zdylib_file*:-dylib_file %*} \
 268    %{Zdynamic:-dynamic}\
 269    %{Zexported_symbols_list*:-exported_symbols_list %*} \
 270    %{Zflat_namespace:-flat_namespace} \
 271    %{headerpad_max_install_names} \
 272    %{Zimage_base*:-image_base %*} \
 273    %{Zinit*:-init %*} \
 274    %{!mmacosx-version-min=*:-macosx_version_min %(darwin_minversion)} \
 275    %{mmacosx-version-min=*:-macosx_version_min %*} \
 276    %{nomultidefs} \
 277    %{Zmulti_module:-multi_module} %{Zsingle_module:-single_module} \
 278    %{Zmultiply_defined*:-multiply_defined %*} \
 279    %{!Zmultiply_defined*:%{shared-libgcc: \
 280      %:version-compare(< 10.5 mmacosx-version-min= -multiply_defined) \
 281      %:version-compare(< 10.5 mmacosx-version-min= suppress)}} \
 282    %{Zmultiplydefinedunused*:-multiply_defined_unused %*} \
 283    " PIE_SPEC " \
 284    %{prebind} %{noprebind} %{nofixprebinding} %{prebind_all_twolevel_modules} \
 285    %{read_only_relocs} \
 286    %{sectcreate*} %{sectorder*} %{seg1addr*} %{segprot*} \
 287    %{Zsegaddr*:-segaddr %*} \
 288    %{Zsegs_read_only_addr*:-segs_read_only_addr %*} \
 289    %{Zsegs_read_write_addr*:-segs_read_write_addr %*} \
 290    %{Zseg_addr_table*: -seg_addr_table %*} \
 291    %{Zfn_seg_addr_table_filename*:-seg_addr_table_filename %*} \
 292    %{sub_library*} %{sub_umbrella*} \
 293    " LINK_SYSROOT_SPEC " \
 294    %{twolevel_namespace} %{twolevel_namespace_hints} \
 295    %{Zumbrella*: -umbrella %*} \
 296    %{undefined*} \
 297    %{Zunexported_symbols_list*:-unexported_symbols_list %*} \
 298    %{Zweak_reference_mismatches*:-weak_reference_mismatches %*} \
 299    %{!Zweak_reference_mismatches*:-weak_reference_mismatches non-weak} \
 300    %{X} \
 301    %{y*} \
 302    %{w} \
 303    %{pagezero_size*} %{segs_read_*} %{seglinkedit} %{noseglinkedit}  \
 304    %{sectalign*} %{sectobjectsymbols*} %{segcreate*} %{whyload} \
 305    %{whatsloaded} %{dylinker_install_name*} \
 306    %{dylinker} %{Mach} "
 307
 308
 309 /* Machine dependent libraries.  */
 310
 311 #define LIB_SPEC "%{!static:-lSystem}"
 312
 313 /* Support -mmacosx-version-min by supplying different (stub) libgcc_s.dylib
 314    libraries to link against, and by not linking against libgcc_s on
 315    earlier-than-10.3.9.
 316
 317    Note that by default, -lgcc_eh is not linked against!  This is
 318    because in a future version of Darwin the EH frame information may
 319    be in a new format, or the fallback routine might be changed; if
 320    you want to explicitly link against the static version of those
 321    routines, because you know you don't need to unwind through system
 322    libraries, you need to explicitly say -static-libgcc.
 323
 324    If it is linked against, it has to be before -lgcc, because it may
 325    need symbols from -lgcc.  */
 326 #undef REAL_LIBGCC_SPEC
 327 #define REAL_LIBGCC_SPEC                                                   \
 328    "%{static-libgcc|static: -lgcc_eh -lgcc;                                \
 329       shared-libgcc|fexceptions|fgnu-runtime:                              \
 330        %:version-compare(!> 10.5 mmacosx-version-min= -lgcc_s.10.4)        \
 331        %:version-compare(>< 10.5 10.6 mmacosx-version-min= -lgcc_s.10.5)   \
 332        %:version-compare(!> 10.5 mmacosx-version-min= -lgcc_ext.10.4)      \
 333        %:version-compare(>= 10.5 mmacosx-version-min= -lgcc_ext.10.5)      \
 334        -lgcc ;                                                             \
 335       :%:version-compare(>< 10.3.9 10.5 mmacosx-version-min= -lgcc_s.10.4) \
 336        %:version-compare(>< 10.5 10.6 mmacosx-version-min= -lgcc_s.10.5)   \
 337        %:version-compare(!> 10.5 mmacosx-version-min= -lgcc_ext.10.4)      \
 338        %:version-compare(>= 10.5 mmacosx-version-min= -lgcc_ext.10.5)      \
 339        -lgcc }"
 340
 341 /* We specify crt0.o as -lcrt0.o so that ld will search the library path.
 342
 343    crt3.o provides __cxa_atexit on systems that don't have it.  Since
 344    it's only used with C++, which requires passing -shared-libgcc, key
 345    off that to avoid unnecessarily adding a destructor to every
 346    powerpc program built.  */
 347
 348 #undef  STARTFILE_SPEC
 349 #define STARTFILE_SPEC                                                      \
 350   "%{Zdynamiclib: %(darwin_dylib1) %{fgnu-tm: -lcrttms.o}}                  \
 351    %{!Zdynamiclib:%{Zbundle:%{!static:                                      \
 352         %:version-compare(< 10.6 mmacosx-version-min= -lbundle1.o)          \
 353         %{fgnu-tm: -lcrttms.o}}}                                            \
 354      %{!Zbundle:%{pg:%{static:-lgcrt0.o}                                    \
 355                      %{!static:%{object:-lgcrt0.o}                          \
 356                                %{!object:%{preload:-lgcrt0.o}               \
 357                                  %{!preload:-lgcrt1.o                       \
 358                                  %:version-compare(>= 10.8 mmacosx-version-min= -no_new_main) \
 359                                  %(darwin_crt2)}}}}    \
 360                 %{!pg:%{static:-lcrt0.o}                                    \
 361                       %{!static:%{object:-lcrt0.o}                          \
 362                                 %{!object:%{preload:-lcrt0.o}               \
 363                                   %{!preload: %(darwin_crt1)                \
 364                                               %(darwin_crt2)}}}}}}          \
 365   %{shared-libgcc:%:version-compare(< 10.5 mmacosx-version-min= crt3.o%s)}"
 366
 367 /* We want a destructor last in the list.  */
 368 #define ENDFILE_SPEC "%{fgnu-tm: -lcrttme.o}"
 369
 370 #define DARWIN_EXTRA_SPECS                                              \
 371   { "darwin_crt1", DARWIN_CRT1_SPEC },                                  \
 372   { "darwin_dylib1", DARWIN_DYLIB1_SPEC },                              \
 373   { "darwin_minversion", DARWIN_MINVERSION_SPEC },
 374
 375 #define DARWIN_DYLIB1_SPEC                                              \
 376   "%:version-compare(!> 10.5 mmacosx-version-min= -ldylib1.o)           \
 377    %:version-compare(>< 10.5 10.6 mmacosx-version-min= -ldylib1.10.5.o)"
 378
 379 #define DARWIN_CRT1_SPEC                                                \
 380   "%:version-compare(!> 10.5 mmacosx-version-min= -lcrt1.o)             \
 381    %:version-compare(>< 10.5 10.6 mmacosx-version-min= -lcrt1.10.5.o)   \
 382    %:version-compare(>< 10.6 10.8 mmacosx-version-min= -lcrt1.10.6.o)   \
 383    %{fgnu-tm: -lcrttms.o}"
 384
 385 /* Default Darwin ASM_SPEC, very simple.  */
 386 #define ASM_SPEC "-arch %(darwin_arch) \
 387   %{Zforce_cpusubtype_ALL:-force_cpusubtype_ALL} \
 388   %{static}"
 389
 390 /* Default ASM_DEBUG_SPEC.  Darwin's as cannot currently produce dwarf
 391    debugging data.  */
 392
 393 #define ASM_DEBUG_SPEC  "%{g*:%{!g0:%{!gdwarf*:--gstabs}}}"
 394
 395 /* We still allow output of STABS.  */
 396
 397 #define DBX_DEBUGGING_INFO 1
 398
 399 #define DWARF2_DEBUGGING_INFO 1
 400 #define PREFERRED_DEBUGGING_TYPE DBX_DEBUG
 401
 402 #define DEBUG_FRAME_SECTION     "__DWARF,__debug_frame,regular,debug"
 403 #define DEBUG_INFO_SECTION      "__DWARF,__debug_info,regular,debug"
 404 #define DEBUG_ABBREV_SECTION    "__DWARF,__debug_abbrev,regular,debug"
 405 #define DEBUG_ARANGES_SECTION   "__DWARF,__debug_aranges,regular,debug"
 406 #define DEBUG_MACINFO_SECTION   "__DWARF,__debug_macinfo,regular,debug"
 407 #define DEBUG_LINE_SECTION      "__DWARF,__debug_line,regular,debug"
 408 #define DEBUG_LOC_SECTION       "__DWARF,__debug_loc,regular,debug"
 409 #define DEBUG_PUBNAMES_SECTION  "__DWARF,__debug_pubnames,regular,debug"
 410 #define DEBUG_PUBTYPES_SECTION  "__DWARF,__debug_pubtypes,regular,debug"
 411 #define DEBUG_STR_SECTION       "__DWARF,__debug_str,regular,debug"
 412 #define DEBUG_RANGES_SECTION    "__DWARF,__debug_ranges,regular,debug"
 413 #define DEBUG_MACRO_SECTION    "__DWARF,__debug_macro,regular,debug"
 414
 415 #define TARGET_WANT_DEBUG_PUB_SECTIONS true
 416
 417 #define TARGET_FORCE_AT_COMP_DIR true
 418
 419 /* When generating stabs debugging, use N_BINCL entries.  */
 420
 421 #define DBX_USE_BINCL
 422
 423 /* There is no limit to the length of stabs strings.  */
 424
 425 #define DBX_CONTIN_LENGTH 0
 426
 427 /* gdb needs a null N_SO at the end of each file for scattered loading.  */
 428
 429 #define DBX_OUTPUT_NULL_N_SO_AT_MAIN_SOURCE_FILE_END
 430
 431 /* GCC's definition of 'one_only' is the same as its definition of 'weak'.  */
 432 #define MAKE_DECL_ONE_ONLY(DECL) (DECL_WEAK (DECL) = 1)
 433
 434 /* Mach-O supports 'weak imports', and 'weak definitions' in coalesced
 435    sections.  machopic_select_section ensures that weak variables go in
 436    coalesced sections.  Weak aliases (or any other kind of aliases) are
 437    not supported.  Weak symbols that aren't visible outside the .s file
 438    are not supported.  */
 439 #define ASM_WEAKEN_DECL(FILE, DECL, NAME, ALIAS)                        \
 440   do {                                                                  \
 441     if (ALIAS)                                                          \
 442       {                                                                 \
 443         warning (0, "alias definitions not supported in Mach-O; ignored");      \
 444         break;                                                          \
 445       }                                                                 \
 446                                                                         \
 447     if (! DECL_EXTERNAL (DECL) && TREE_PUBLIC (DECL))                   \
 448       targetm.asm_out.globalize_label (FILE, NAME);                     \
 449     if (DECL_EXTERNAL (DECL))                                           \
 450       fputs ("\t.weak_reference ", FILE);                               \
 451     else if (lookup_attribute ("weak_import", DECL_ATTRIBUTES (DECL)))  \
 452       break;                                                            \
 453     else if (TREE_PUBLIC (DECL))                                        \
 454       fputs ("\t.weak_definition ", FILE);                              \
 455     else                                                                \
 456       break;                                                            \
 457     assemble_name (FILE, NAME);                                         \
 458     fputc ('\n', FILE);                                                 \
 459   } while (0)
 460
 461 /* Darwin has the pthread routines in libSystem, which every program
 462    links to, so there's no need for weak-ness for that.  */
 463 #define GTHREAD_USE_WEAK 0
 464
 465 /* The Darwin linker doesn't want coalesced symbols to appear in
 466    a static archive's table of contents. */
 467 #undef TARGET_WEAK_NOT_IN_ARCHIVE_TOC
 468 #define TARGET_WEAK_NOT_IN_ARCHIVE_TOC 1
 469
 470 /* On Darwin, we don't (at the time of writing) have linkonce sections
 471    with names, so it's safe to make the class data not comdat.  */
 472 #define TARGET_CXX_CLASS_DATA_ALWAYS_COMDAT hook_bool_void_false
 473
 474 /* For efficiency, on Darwin the RTTI information that is always
 475    emitted in the standard C++ library should not be COMDAT.  */
 476 #define TARGET_CXX_LIBRARY_RTTI_COMDAT hook_bool_void_false
 477
 478 /* We make exception information linkonce. */
 479 #undef TARGET_USES_WEAK_UNWIND_INFO
 480 #define TARGET_USES_WEAK_UNWIND_INFO 1
 481
 482 /* We need to use a nonlocal label for the start of an EH frame: the
 483    Darwin linker requires that a coalesced section start with a label.
 484    Unfortunately, it also requires that 'debug' sections don't contain
 485    labels.  */
 486 #undef FRAME_BEGIN_LABEL
 487 #define FRAME_BEGIN_LABEL (for_eh ? "EH_frame" : "Lframe")
 488
 489 /* Emit a label for the FDE corresponding to DECL.  EMPTY means
 490    emit a label for an empty FDE. */
 491 #define TARGET_ASM_EMIT_UNWIND_LABEL darwin_emit_unwind_label
 492
 493 /* Emit a label to separate the exception table.  */
 494 #define TARGET_ASM_EMIT_EXCEPT_TABLE_LABEL darwin_emit_except_table_label
 495
 496 /* Our profiling scheme doesn't LP labels and counter words.  */
 497
 498 #define NO_PROFILE_COUNTERS     1
 499
 500 #undef  INIT_SECTION_ASM_OP
 501 #define INIT_SECTION_ASM_OP
 502
 503 #undef  INVOKE__main
 504
 505 #define TARGET_ASM_CONSTRUCTOR  machopic_asm_out_constructor
 506 #define TARGET_ASM_DESTRUCTOR   machopic_asm_out_destructor
 507
 508 /* Always prefix with an underscore.  */
 509
 510 #define USER_LABEL_PREFIX "_"
 511
 512 /* A dummy symbol that will be replaced with the function base name.  */
 513 #define MACHOPIC_FUNCTION_BASE_NAME "<pic base>"
 514
 515 /* Don't output a .file directive.  That is only used by the assembler for
 516    error reporting.  */
 517 #undef  TARGET_ASM_FILE_START_FILE_DIRECTIVE
 518 #define TARGET_ASM_FILE_START_FILE_DIRECTIVE false
 519
 520 #undef  TARGET_ASM_FILE_END
 521 #define TARGET_ASM_FILE_END darwin_file_end
 522
 523 /* Because Mach-O relocations have a counter from 1 to 255 for the
 524    section number they apply to, it is necessary to output all
 525    normal sections before the LTO sections, to make sure that the
 526    sections that may have relocations always have a section number
 527    smaller than 255.  */
 528 #undef  TARGET_ASM_LTO_START
 529 #define TARGET_ASM_LTO_START darwin_asm_lto_start
 530 #undef  TARGET_ASM_LTO_END
 531 #define TARGET_ASM_LTO_END darwin_asm_lto_end
 532
 533 #define ASM_OUTPUT_SKIP(FILE,SIZE)  \
 534   fprintf (FILE, "\t.space "HOST_WIDE_INT_PRINT_UNSIGNED"\n", SIZE)
 535
 536 /* Give ObjC methods pretty symbol names.  */
 537
 538 #undef  OBJC_GEN_METHOD_LABEL
 539 #define OBJC_GEN_METHOD_LABEL(BUF,IS_INST,CLASS_NAME,CAT_NAME,SEL_NAME,NUM) \
 540   do { if (CAT_NAME)                                                    \
 541          sprintf (BUF, "%c[%s(%s) %s]", (IS_INST) ? '-' : '+',          \
 542                   (CLASS_NAME), (CAT_NAME), (SEL_NAME));                \
 543        else                                                             \
 544          sprintf (BUF, "%c[%s %s]", (IS_INST) ? '-' : '+',              \
 545                   (CLASS_NAME), (SEL_NAME));                            \
 546      } while (0)
 547
 548 #undef ASM_DECLARE_OBJECT_NAME
 549 #define ASM_DECLARE_OBJECT_NAME(FILE, NAME, DECL) \
 550         darwin_asm_declare_object_name ((FILE), (NAME), (DECL))
 551
 552 /* The RTTI data (e.g., __ti4name) is common and public (and static),
 553    but it does need to be referenced via indirect PIC data pointers.
 554    The machopic_define_symbol calls are telling the machopic subsystem
 555    that the name *is* defined in this module, so it doesn't need to
 556    make them indirect.  */
 557
 558 #define ASM_DECLARE_FUNCTION_NAME(FILE, NAME, DECL)                     \
 559   do {                                                                  \
 560     const char *xname = NAME;                                           \
 561     if (GET_CODE (XEXP (DECL_RTL (DECL), 0)) != SYMBOL_REF)             \
 562       xname = IDENTIFIER_POINTER (DECL_NAME (DECL));                    \
 563     if (! DECL_WEAK (DECL)                                              \
 564         && ((TREE_STATIC (DECL)                                         \
 565              && (!DECL_COMMON (DECL) || !TREE_PUBLIC (DECL)))           \
 566             || DECL_INITIAL (DECL)))                                    \
 567         machopic_define_symbol (DECL_RTL (DECL));                       \
 568     if ((TREE_STATIC (DECL)                                             \
 569          && (!DECL_COMMON (DECL) || !TREE_PUBLIC (DECL)))               \
 570         || DECL_INITIAL (DECL))                                         \
 571       (* targetm.encode_section_info) (DECL, DECL_RTL (DECL), false);   \
 572     ASM_OUTPUT_FUNCTION_LABEL (FILE, xname, DECL);                      \
 573   } while (0)
 574
 575 #undef TARGET_ASM_DECLARE_CONSTANT_NAME
 576 #define TARGET_ASM_DECLARE_CONSTANT_NAME darwin_asm_declare_constant_name
 577
 578 /* Wrap new method names in quotes so the assembler doesn't gag.
 579    Make Objective-C internal symbols local and in doing this, we need
 580    to accommodate the name mangling done by c++ on file scope locals.  */
 581
 582 int darwin_label_is_anonymous_local_objc_name (const char *name);
 583
 584 #undef  ASM_OUTPUT_LABELREF
 585 #define ASM_OUTPUT_LABELREF(FILE,NAME)                                       \
 586   do {                                                                       \
 587        const char *xname = (NAME);                                           \
 588        if (! strcmp (xname, MACHOPIC_FUNCTION_BASE_NAME))                    \
 589          machopic_output_function_base_name(FILE);                           \
 590        else if (xname[0] == '&' || xname[0] == '*')                          \
 591          {                                                                   \
 592            int len = strlen (xname);                                         \
 593            if (len > 6 && !strcmp ("$stub", xname + len - 5))                \
 594              machopic_validate_stub_or_non_lazy_ptr (xname);                 \
 595            else if (len > 7 && !strcmp ("$stub\"", xname + len - 6))         \
 596              machopic_validate_stub_or_non_lazy_ptr (xname);                 \
 597            else if (len > 14 && !strcmp ("$non_lazy_ptr", xname + len - 13)) \
 598              machopic_validate_stub_or_non_lazy_ptr (xname);                 \
 599            else if (len > 15 && !strcmp ("$non_lazy_ptr\"", xname + len - 14)) \
 600              machopic_validate_stub_or_non_lazy_ptr (xname);                 \
 601            if (xname[1] != '"' && name_needs_quotes (&xname[1]))             \
 602              fprintf (FILE, "\"%s\"", &xname[1]);                            \
 603            else                                                              \
 604              fputs (&xname[1], FILE);                                        \
 605          }                                                                   \
 606        else if (xname[0] == '+' || xname[0] == '-')                          \
 607          fprintf (FILE, "\"%s\"", xname);                                    \
 608        else if (darwin_label_is_anonymous_local_objc_name (xname))           \
 609          fprintf (FILE, "L%s", xname);                                       \
 610        else if (xname[0] != '"' && name_needs_quotes (xname))                \
 611          asm_fprintf (FILE, "\"%U%s\"", xname);                              \
 612        else                                                                  \
 613          asm_fprintf (FILE, "%U%s", xname);                                  \
 614   } while (0)
 615
 616 /* Output before executable code.  */
 617 #undef TEXT_SECTION_ASM_OP
 618 #define TEXT_SECTION_ASM_OP "\t.text"
 619
 620 /* Output before writable data.  */
 621
 622 #undef DATA_SECTION_ASM_OP
 623 #define DATA_SECTION_ASM_OP "\t.data"
 624
 625 #undef  ALIGN_ASM_OP
 626 #define ALIGN_ASM_OP            ".align"
 627
 628 #undef  ASM_OUTPUT_ALIGN
 629 #define ASM_OUTPUT_ALIGN(FILE,LOG)      \
 630   if ((LOG) != 0)                       \
 631     fprintf (FILE, "\t%s\t%d\n", ALIGN_ASM_OP, (LOG))
 632
 633 /* The maximum alignment which the object file format can support in
 634    bits.  For Mach-O, this is 2^15 bytes.  */
 635
 636 #undef  MAX_OFILE_ALIGNMENT
 637 #define MAX_OFILE_ALIGNMENT (0x8000 * 8)
 638
 639 #define L2_MAX_OFILE_ALIGNMENT 15
 640
 641 /*  These are the three variants that emit referenced blank space.  */
 642 #define ASM_OUTPUT_ALIGNED_BSS(FILE, DECL, NAME, SIZE, ALIGN)           \
 643         darwin_output_aligned_bss ((FILE), (DECL), (NAME), (SIZE), (ALIGN))
 644
 645 #undef  ASM_OUTPUT_ALIGNED_DECL_LOCAL
 646 #define ASM_OUTPUT_ALIGNED_DECL_LOCAL(FILE, DECL, NAME, SIZE, ALIGN)    \
 647         darwin_asm_output_aligned_decl_local                            \
 648                                   ((FILE), (DECL), (NAME), (SIZE), (ALIGN))
 649
 650 #undef  ASM_OUTPUT_ALIGNED_DECL_COMMON
 651 #define ASM_OUTPUT_ALIGNED_DECL_COMMON(FILE, DECL, NAME, SIZE, ALIGN)   \
 652         darwin_asm_output_aligned_decl_common                           \
 653                                    ((FILE), (DECL), (NAME), (SIZE), (ALIGN))
 654
 655 /* The generic version, archs should over-ride where required.  */
 656 #define MACHOPIC_NL_SYMBOL_PTR_SECTION ".non_lazy_symbol_pointer"
 657
 658 /* Declare the section variables.  */
 659 #ifndef USED_FOR_TARGET
 660 enum darwin_section_enum {
 661 #define DEF_SECTION(NAME, FLAGS, DIRECTIVE, OBJC) NAME,
 662 #include "darwin-sections.def"
 663 #undef DEF_SECTION
 664   NUM_DARWIN_SECTIONS
 665 };
 666 extern GTY(()) section * darwin_sections[NUM_DARWIN_SECTIONS];
 667 #endif
 668
 669 #undef  TARGET_ASM_SELECT_SECTION
 670 #define TARGET_ASM_SELECT_SECTION machopic_select_section
 671
 672 #undef  TARGET_ASM_FUNCTION_SECTION
 673 #define TARGET_ASM_FUNCTION_SECTION darwin_function_section
 674
 675 #undef  TARGET_ASM_FUNCTION_SWITCHED_TEXT_SECTIONS
 676 #define TARGET_ASM_FUNCTION_SWITCHED_TEXT_SECTIONS \
 677         darwin_function_switched_text_sections
 678
 679 #undef  TARGET_ASM_SELECT_RTX_SECTION
 680 #define TARGET_ASM_SELECT_RTX_SECTION machopic_select_rtx_section
 681 #undef  TARGET_ASM_UNIQUE_SECTION
 682 #define TARGET_ASM_UNIQUE_SECTION darwin_unique_section
 683 #undef  TARGET_ASM_FUNCTION_RODATA_SECTION
 684 #define TARGET_ASM_FUNCTION_RODATA_SECTION default_no_function_rodata_section
 685
 686 #undef  TARGET_ASM_TM_CLONE_TABLE_SECTION
 687 #define TARGET_ASM_TM_CLONE_TABLE_SECTION darwin_tm_clone_table_section
 688
 689 #undef  TARGET_ASM_RELOC_RW_MASK
 690 #define TARGET_ASM_RELOC_RW_MASK machopic_reloc_rw_mask
 691
 692 /* Globalizing directive for a label.  */
 693 #define GLOBAL_ASM_OP "\t.globl "
 694 #define TARGET_ASM_GLOBALIZE_LABEL darwin_globalize_label
 695
 696 /* Emit an assembler directive to set visibility for a symbol.  Used
 697    to support visibility attribute and Darwin's private extern
 698    feature.  */
 699 #undef TARGET_ASM_ASSEMBLE_VISIBILITY
 700 #define TARGET_ASM_ASSEMBLE_VISIBILITY darwin_assemble_visibility
 701
 702 /* Extra attributes for Darwin.  */
 703 #define SUBTARGET_ATTRIBUTE_TABLE                                            \
 704   /* { name, min_len, max_len, decl_req, type_req, fn_type_req, handler,     \
 705        affects_type_identity } */                                                    \
 706   { "apple_kext_compatibility", 0, 0, false, true, false,                    \
 707     darwin_handle_kext_attribute, false },                                   \
 708   { "weak_import", 0, 0, true, false, false,                                 \
 709     darwin_handle_weak_import_attribute, false }
 710
 711 #undef ASM_GENERATE_INTERNAL_LABEL
 712 #define ASM_GENERATE_INTERNAL_LABEL(LABEL,PREFIX,NUM)   \
 713   sprintf (LABEL, "*%s%ld", PREFIX, (long)(NUM))
 714
 715 #undef TARGET_ASM_MARK_DECL_PRESERVED
 716 #define TARGET_ASM_MARK_DECL_PRESERVED darwin_mark_decl_preserved
 717
 718 /* Set on a symbol with SYMBOL_FLAG_FUNCTION or
 719    MACHO_SYMBOL_FLAG_VARIABLE to indicate that the function or
 720    variable has been defined in this translation unit.
 721    When porting Mach-O to new architectures you need to make
 722    sure these aren't clobbered by the backend.  */
 723
 724 #define MACHO_SYMBOL_FLAG_VARIABLE (SYMBOL_FLAG_MACH_DEP)
 725 #define MACHO_SYMBOL_FLAG_DEFINED ((SYMBOL_FLAG_MACH_DEP) << 1)
 726
 727 /* Set on a symbol to indicate when fix-and-continue style code
 728    generation is being used and the symbol refers to a static symbol
 729    that should be rebound from new instances of a translation unit to
 730    the original instance of the data.  */
 731
 732 #define MACHO_SYMBOL_STATIC ((SYMBOL_FLAG_MACH_DEP) << 2)
 733
 734 /* Symbolic names for various things we might know about a symbol.  */
 735
 736 enum machopic_addr_class {
 737   MACHOPIC_UNDEFINED,
 738   MACHOPIC_DEFINED_DATA,
 739   MACHOPIC_UNDEFINED_DATA,
 740   MACHOPIC_DEFINED_FUNCTION,
 741   MACHOPIC_UNDEFINED_FUNCTION
 742 };
 743
 744 /* Macros defining the various PIC cases.  */
 745
 746 #undef  MACHO_DYNAMIC_NO_PIC_P
 747 #define MACHO_DYNAMIC_NO_PIC_P  (TARGET_MACHO_DYNAMIC_NO_PIC)
 748 #undef  MACHOPIC_INDIRECT
 749 #define MACHOPIC_INDIRECT       (flag_pic || MACHO_DYNAMIC_NO_PIC_P)
 750 #define MACHOPIC_JUST_INDIRECT  (MACHO_DYNAMIC_NO_PIC_P)
 751 #undef  MACHOPIC_PURE
 752 #define MACHOPIC_PURE           (flag_pic && ! MACHO_DYNAMIC_NO_PIC_P)
 753
 754 #undef TARGET_ENCODE_SECTION_INFO
 755 #define TARGET_ENCODE_SECTION_INFO  darwin_encode_section_info
 756 #undef TARGET_STRIP_NAME_ENCODING
 757 #define TARGET_STRIP_NAME_ENCODING  default_strip_name_encoding
 758
 759 #define GEN_BINDER_NAME_FOR_STUB(BUF,STUB,STUB_LENGTH)          \
 760   do {                                                          \
 761     const char *const stub_ = (STUB);                           \
 762     char *buffer_ = (BUF);                                      \
 763     strcpy (buffer_, stub_);                                    \
 764     if (stub_[0] == '"')                                        \
 765       {                                                         \
 766         strcpy (buffer_ + (STUB_LENGTH) - 1, "_binder\"");      \
 767       }                                                         \
 768     else                                                        \
 769       {                                                         \
 770         strcpy (buffer_ + (STUB_LENGTH), "_binder");            \
 771       }                                                         \
 772   } while (0)
 773
 774 #define GEN_SYMBOL_NAME_FOR_SYMBOL(BUF,SYMBOL,SYMBOL_LENGTH)    \
 775   do {                                                          \
 776     const char *const symbol_ = (SYMBOL);                       \
 777     char *buffer_ = (BUF);                                      \
 778     if (name_needs_quotes (symbol_) && symbol_[0] != '"')       \
 779       {                                                         \
 780           sprintf (buffer_, "\"%s\"", symbol_);                 \
 781       }                                                         \
 782     else                                                        \
 783       {                                                         \
 784         strcpy (buffer_, symbol_);                              \
 785       }                                                         \
 786   } while (0)
 787
 788 /* Given a symbol name string, create the lazy pointer version
 789    of the symbol name.  */
 790
 791 #define GEN_LAZY_PTR_NAME_FOR_SYMBOL(BUF,SYMBOL,SYMBOL_LENGTH)  \
 792   do {                                                          \
 793     const char *symbol_ = (SYMBOL);                             \
 794     char *buffer_ = (BUF);                                      \
 795     if (symbol_[0] == '"')                                      \
 796       {                                                         \
 797         strcpy (buffer_, "\"L");                                \
 798         strcpy (buffer_ + 2, symbol_ + 1);                      \
 799         strcpy (buffer_ + (SYMBOL_LENGTH), "$lazy_ptr\"");      \
 800       }                                                         \
 801     else if (name_needs_quotes (symbol_))                       \
 802       {                                                         \
 803         strcpy (buffer_, "\"L");                                \
 804         strcpy (buffer_ + 2, symbol_);                          \
 805         strcpy (buffer_ + (SYMBOL_LENGTH) + 2, "$lazy_ptr\"");  \
 806       }                                                         \
 807     else                                                        \
 808       {                                                         \
 809         strcpy (buffer_, "L");                                  \
 810         strcpy (buffer_ + 1, symbol_);                          \
 811         strcpy (buffer_ + (SYMBOL_LENGTH) + 1, "$lazy_ptr");    \
 812       }                                                         \
 813   } while (0)
 814
 815 #define EH_FRAME_SECTION_NAME   "__TEXT"
 816 #define EH_FRAME_SECTION_ATTR ",coalesced,no_toc+strip_static_syms+live_support"
 817
 818 /* Java runtime class list.  */
 819 #define JCR_SECTION_NAME "__DATA,jcr,regular,no_dead_strip"
 820
 821 #undef ASM_PREFERRED_EH_DATA_FORMAT
 822 #define ASM_PREFERRED_EH_DATA_FORMAT(CODE,GLOBAL)  \
 823   (((CODE) == 2 && (GLOBAL) == 1) \
 824    ? (DW_EH_PE_pcrel | DW_EH_PE_indirect | DW_EH_PE_sdata4) : \
 825      ((CODE) == 1 || (GLOBAL) == 0) ? DW_EH_PE_pcrel : DW_EH_PE_absptr)
 826
 827 #define ASM_OUTPUT_DWARF_DELTA(FILE,SIZE,LABEL1,LABEL2)  \
 828   darwin_asm_output_dwarf_delta (FILE, SIZE, LABEL1, LABEL2)
 829
 830 #define ASM_OUTPUT_DWARF_OFFSET(FILE,SIZE,LABEL,BASE)  \
 831   darwin_asm_output_dwarf_offset (FILE, SIZE, LABEL, BASE)
 832
 833 #define ASM_MAYBE_OUTPUT_ENCODED_ADDR_RTX(ASM_OUT_FILE, ENCODING, SIZE, ADDR, DONE)     \
 834       if (ENCODING == ASM_PREFERRED_EH_DATA_FORMAT (2, 1)) {                            \
 835         darwin_non_lazy_pcrel (ASM_OUT_FILE, ADDR);                                     \
 836         goto DONE;                                                                      \
 837       }
 838
 839 /* Experimentally, putting jump tables in text is faster on SPEC.
 840    Also this is needed for correctness for coalesced functions.  */
 841
 842 #ifndef JUMP_TABLES_IN_TEXT_SECTION
 843 #define JUMP_TABLES_IN_TEXT_SECTION 1
 844 #endif
 845
 846 #define TARGET_TERMINATE_DW2_EH_FRAME_INFO false
 847
 848 #define TARGET_ASM_INIT_SECTIONS darwin_init_sections
 849 #undef TARGET_ASM_NAMED_SECTION
 850 #define TARGET_ASM_NAMED_SECTION darwin_asm_named_section
 851
 852 #define DARWIN_REGISTER_TARGET_PRAGMAS()                        \
 853   do {                                                          \
 854     if (!flag_preprocess_only)                                  \
 855       cpp_register_pragma (parse_in, NULL, "mark",              \
 856                            darwin_pragma_ignore, false);        \
 857     c_register_pragma (0, "options", darwin_pragma_options);    \
 858     c_register_pragma (0, "segment", darwin_pragma_ignore);     \
 859     c_register_pragma (0, "unused", darwin_pragma_unused);      \
 860     c_register_pragma (0, "ms_struct", darwin_pragma_ms_struct); \
 861   } while (0)
 862
 863 #undef ASM_APP_ON
 864 #define ASM_APP_ON ""
 865 #undef ASM_APP_OFF
 866 #define ASM_APP_OFF ""
 867
 868 void darwin_register_frameworks (const char *, const char *, int);
 869 void darwin_register_objc_includes (const char *, const char *, int);
 870 #define TARGET_EXTRA_PRE_INCLUDES darwin_register_objc_includes
 871 #define TARGET_EXTRA_INCLUDES darwin_register_frameworks
 872
 873 void add_framework_path (char *);
 874 #define TARGET_OPTF add_framework_path
 875
 876 #define TARGET_POSIX_IO
 877
 878 /* All new versions of Darwin have C99 functions.  */
 879
 880 #define TARGET_C99_FUNCTIONS 1
 881
 882 #define WINT_TYPE "int"
 883
 884 /* Every program on darwin links against libSystem which contains the pthread
 885    routines, so there's no need to explicitly call out when doing threaded
 886    work.  */
 887
 888 #undef GOMP_SELF_SPECS
 889 #define GOMP_SELF_SPECS ""
 890 #undef GTM_SELF_SPECS
 891 #define GTM_SELF_SPECS ""
 892
 893 /* Darwin disables section anchors by default.
 894    They should be enabled per arch where support exists in that arch.  */
 895 #define TARGET_ASM_OUTPUT_ANCHOR NULL
 896 #define DARWIN_SECTION_ANCHORS 0
 897
 898 #define HAVE_ENABLE_EXECUTE_STACK
 899
 900 /* For Apple KEXTs, we make the constructors return this to match gcc
 901    2.95.  */
 902 #define TARGET_CXX_CDTOR_RETURNS_THIS (darwin_kextabi_p)
 903 #define TARGET_KEXTABI flag_apple_kext
 904
 905 /* We have target-specific builtins.  */
 906 #define SUBTARGET_FOLD_BUILTIN darwin_fold_builtin
 907
 908 #define TARGET_N_FORMAT_TYPES 1
 909 #define TARGET_FORMAT_TYPES darwin_additional_format_types
 910
 911 #ifndef USED_FOR_TARGET
 912 extern void darwin_driver_init (unsigned int *,struct cl_decoded_option **);
 913 #define GCC_DRIVER_HOST_INITIALIZATION \
 914   darwin_driver_init (&decoded_options_count, &decoded_options)
 915 #endif
 916
 917 /* The Apple assembler and linker do not support constructor priorities.  */
 918 #undef SUPPORTS_INIT_PRIORITY
 919 #define SUPPORTS_INIT_PRIORITY 0
 920
 921 /* When building cross-compilers (and native crosses) we shall default to
 922    providing an osx-version-min of this unless overridden by the User.  */
 923 #define DEF_MIN_OSX_VERSION "10.4"
 924
 925 #endif /* CONFIG_DARWIN_H */