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
   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 OBJECT_FORMAT_MACHO
  46
  47 /* Don't assume anything about the header files.  */
  48 #define NO_IMPLICIT_EXTERN_C
  49
  50 /* Suppress g++ attempt to link in the math library automatically. */
  51 #define MATH_LIBRARY ""
  52
  53 /* We have atexit.  */
  54
  55 #define HAVE_ATEXIT
  56
  57 /* Define an empty body for the function do_global_dtors() in libgcc2.c.  */
  58
  59 #define DO_GLOBAL_DTORS_BODY
  60
  61 /* The string value for __SIZE_TYPE__.  */
  62
  63 #ifndef SIZE_TYPE
  64 #define SIZE_TYPE "long unsigned int"
  65 #endif
  66
  67 /* Type used for ptrdiff_t, as a string used in a declaration.  */
  68
  69 #undef  PTRDIFF_TYPE
  70 #define PTRDIFF_TYPE "int"
  71
  72 /* wchar_t is int.  */
  73
  74 #undef  WCHAR_TYPE
  75 #define WCHAR_TYPE "int"
  76 #undef  WCHAR_TYPE_SIZE
  77 #define WCHAR_TYPE_SIZE 32
  78
  79 #define INT8_TYPE "signed char"
  80 #define INT16_TYPE "short int"
  81 #define INT32_TYPE "int"
  82 #define INT64_TYPE "long long int"
  83 #define UINT8_TYPE "unsigned char"
  84 #define UINT16_TYPE "short unsigned int"
  85 #define UINT32_TYPE "unsigned int"
  86 #define UINT64_TYPE "long long unsigned int"
  87
  88 #define INT_LEAST8_TYPE "signed char"
  89 #define INT_LEAST16_TYPE "short int"
  90 #define INT_LEAST32_TYPE "int"
  91 #define INT_LEAST64_TYPE "long long int"
  92 #define UINT_LEAST8_TYPE "unsigned char"
  93 #define UINT_LEAST16_TYPE "short unsigned int"
  94 #define UINT_LEAST32_TYPE "unsigned int"
  95 #define UINT_LEAST64_TYPE "long long unsigned int"
  96
  97 #define INT_FAST8_TYPE "signed char"
  98 #define INT_FAST16_TYPE "short int"
  99 #define INT_FAST32_TYPE "int"
 100 #define INT_FAST64_TYPE "long long int"
 101 #define UINT_FAST8_TYPE "unsigned char"
 102 #define UINT_FAST16_TYPE "short unsigned int"
 103 #define UINT_FAST32_TYPE "unsigned int"
 104 #define UINT_FAST64_TYPE "long long unsigned int"
 105
 106 #define INTPTR_TYPE "long int"
 107 #define UINTPTR_TYPE "long unsigned int"
 108
 109 #define SIG_ATOMIC_TYPE "int"
 110
 111 /* Default to using the NeXT-style runtime, since that's what is
 112    pre-installed on Darwin systems.  */
 113
 114 #define NEXT_OBJC_RUNTIME
 115
 116 /* Don't default to pcc-struct-return, because gcc is the only compiler, and
 117    we want to retain compatibility with older gcc versions.  */
 118
 119 #undef  DEFAULT_PCC_STRUCT_RETURN
 120 #define DEFAULT_PCC_STRUCT_RETURN 0
 121
 122 /* True if pragma ms_struct is in effect.  */
 123 extern GTY(()) int darwin_ms_struct;
 124
 125 /* This table intercepts weirdo options whose names would interfere
 126    with normal driver conventions, and either translates them into
 127    standardly-named options, or adds a 'Z' so that they can get to
 128    specs processing without interference.
 129
 130    Do not expand a linker option to "-Xlinker -<option>", since that
 131    forfeits the ability to control via spec strings later.  However,
 132    as a special exception, do this translation with -filelist, because
 133    otherwise the driver will think there are no input files and quit.
 134    (The alternative would be to hack the driver to recognize -filelist
 135    specially, but it's simpler to use the translation table.)
 136
 137    Note that an option name with a prefix that matches another option
 138    name, that also takes an argument, needs to be modified so the
 139    prefix is different, otherwise a '*' after the shorter option will
 140    match with the longer one.
 141
 142    The SUBTARGET_OPTION_TRANSLATE_TABLE macro, which _must_ be defined
 143    in gcc/config/{i386,rs6000}/darwin.h, should contain any additional
 144    command-line option translations specific to the particular target
 145    architecture.  */
 146
 147 #define TARGET_OPTION_TRANSLATE_TABLE \
 148   { "-all_load", "-Zall_load" },  \
 149   { "-allowable_client", "-Zallowable_client" },  \
 150   { "-arch_errors_fatal", "-Zarch_errors_fatal" },  \
 151   { "-bind_at_load", "-Zbind_at_load" },  \
 152   { "-bundle", "-Zbundle" },  \
 153   { "-bundle_loader", "-Zbundle_loader" },  \
 154   { "-weak_reference_mismatches", "-Zweak_reference_mismatches" },  \
 155   { "-dead_strip", "-Zdead_strip" }, \
 156   { "-no_dead_strip_inits_and_terms", "-Zno_dead_strip_inits_and_terms" }, \
 157   { "-dependency-file", "-MF" }, \
 158   { "-dylib_file", "-Zdylib_file" }, \
 159   { "-dynamic", "-Zdynamic" },  \
 160   { "-dynamiclib", "-Zdynamiclib" },  \
 161   { "-exported_symbols_list", "-Zexported_symbols_list" },  \
 162   { "-gfull", "-g -fno-eliminate-unused-debug-symbols" }, \
 163   { "-gused", "-g -feliminate-unused-debug-symbols" }, \
 164   { "-segaddr", "-Zsegaddr" }, \
 165   { "-segs_read_only_addr", "-Zsegs_read_only_addr" }, \
 166   { "-segs_read_write_addr", "-Zsegs_read_write_addr" }, \
 167   { "-seg_addr_table", "-Zseg_addr_table" }, \
 168   { "-seg_addr_table_filename", "-Zfn_seg_addr_table_filename" }, \
 169   { "-umbrella", "-Zumbrella" }, \
 170   { "-fapple-kext", "-fapple-kext -static -Wa,-static" }, \
 171   { "-filelist", "-Xlinker -filelist -Xlinker" },  \
 172   { "-findirect-virtual-calls", "-fapple-kext" }, \
 173   { "-flat_namespace", "-Zflat_namespace" },  \
 174   { "-force_cpusubtype_ALL", "-Zforce_cpusubtype_ALL" },  \
 175   { "-force_flat_namespace", "-Zforce_flat_namespace" },  \
 176   { "-framework", "-Xlinker -framework -Xlinker" },  \
 177   { "-fterminated-vtables", "-fapple-kext" }, \
 178   { "-image_base", "-Zimage_base" },  \
 179   { "-init", "-Zinit" },  \
 180   { "-install_name", "-Zinstall_name" },  \
 181   { "-mkernel", "-mkernel -static -Wa,-static" }, \
 182   { "-multiply_defined_unused", "-Zmultiplydefinedunused" },  \
 183   { "-multiply_defined", "-Zmultiply_defined" },  \
 184   { "-multi_module", "-Zmulti_module" },  \
 185   { "-static", "-static -Wa,-static" },  \
 186   { "-shared", "-Zdynamiclib" }, \
 187   { "-single_module", "-Zsingle_module" },  \
 188   { "-unexported_symbols_list", "-Zunexported_symbols_list" }, \
 189   SUBTARGET_OPTION_TRANSLATE_TABLE
 190
 191 #define SUBSUBTARGET_OVERRIDE_OPTIONS                                   \
 192   do {                                                                  \
 193     darwin_override_options ();                                         \
 194   } while (0)
 195
 196 /* These compiler options take n arguments.  */
 197
 198 #undef  WORD_SWITCH_TAKES_ARG
 199 #define WORD_SWITCH_TAKES_ARG(STR)              \
 200   (DEFAULT_WORD_SWITCH_TAKES_ARG (STR) ? 1 :    \
 201    !strcmp (STR, "Zallowable_client") ? 1 :     \
 202    !strcmp (STR, "arch") ? 1 :                  \
 203    !strcmp (STR, "arch_only") ? 1 :             \
 204    !strcmp (STR, "Zbundle_loader") ? 1 :        \
 205    !strcmp (STR, "client_name") ? 1 :           \
 206    !strcmp (STR, "compatibility_version") ? 1 : \
 207    !strcmp (STR, "current_version") ? 1 :       \
 208    !strcmp (STR, "Zdylib_file") ? 1 :           \
 209    !strcmp (STR, "Zexported_symbols_list") ? 1 : \
 210    !strcmp (STR, "Zimage_base") ? 1 :           \
 211    !strcmp (STR, "Zinit") ? 1 :                 \
 212    !strcmp (STR, "Zinstall_name") ? 1 :         \
 213    !strcmp (STR, "Zmultiplydefinedunused") ? 1 : \
 214    !strcmp (STR, "Zmultiply_defined") ? 1 :     \
 215    !strcmp (STR, "precomp-trustfile") ? 1 :     \
 216    !strcmp (STR, "read_only_relocs") ? 1 :      \
 217    !strcmp (STR, "sectcreate") ? 3 :            \
 218    !strcmp (STR, "sectorder") ? 3 :             \
 219    !strcmp (STR, "Zsegaddr") ? 2 :              \
 220    !strcmp (STR, "Zsegs_read_only_addr") ? 1 :  \
 221    !strcmp (STR, "Zsegs_read_write_addr") ? 1 : \
 222    !strcmp (STR, "Zseg_addr_table") ? 1 :       \
 223    !strcmp (STR, "Zfn_seg_addr_table_filename") ? 1 :\
 224    !strcmp (STR, "seg1addr") ? 1 :              \
 225    !strcmp (STR, "segprot") ? 3 :               \
 226    !strcmp (STR, "sub_library") ? 1 :           \
 227    !strcmp (STR, "sub_umbrella") ? 1 :          \
 228    !strcmp (STR, "Zumbrella") ? 1 :             \
 229    !strcmp (STR, "undefined") ? 1 :             \
 230    !strcmp (STR, "Zunexported_symbols_list") ? 1 : \
 231    !strcmp (STR, "Zweak_reference_mismatches") ? 1 : \
 232    !strcmp (STR, "pagezero_size") ? 1 :         \
 233    !strcmp (STR, "segs_read_only_addr") ? 1 :   \
 234    !strcmp (STR, "segs_read_write_addr") ? 1 :  \
 235    !strcmp (STR, "sectalign") ? 3 :             \
 236    !strcmp (STR, "sectobjectsymbols") ? 2 :     \
 237    !strcmp (STR, "segcreate") ? 3 :             \
 238    !strcmp (STR, "dylinker_install_name") ? 1 : \
 239    0)
 240
 241 #define SUBTARGET_C_COMMON_OVERRIDE_OPTIONS do {                        \
 242     if (flag_mkernel || flag_apple_kext)                                \
 243       {                                                                 \
 244         if (flag_use_cxa_atexit == 2)                                   \
 245           flag_use_cxa_atexit = 0;                                      \
 246         /* kexts should always be built without the coalesced sections  \
 247            because the kernel loader doesn't grok such sections.  */    \
 248         flag_weak = 0;                                                  \
 249         /* No RTTI in kexts.  */                                        \
 250         flag_rtti = 0;                                                  \
 251       }                                                                 \
 252   } while (0)
 253
 254 /* Machine dependent cpp options.  Don't add more options here, add
 255    them to darwin_cpp_builtins in darwin-c.c.  */
 256
 257 #undef  CPP_SPEC
 258 #define CPP_SPEC "%{static:%{!dynamic:-D__STATIC__}}%{!static:-D__DYNAMIC__}" \
 259         " %{pthread:-D_REENTRANT}"
 260
 261 /* This is mostly a clone of the standard LINK_COMMAND_SPEC, plus
 262    precomp, libtool, and fat build additions.  Also we
 263    don't specify a second %G after %L because libSystem is
 264    self-contained and doesn't need to link against libgcc.a.  */
 265 /* In general, random Darwin linker flags should go into LINK_SPEC
 266    instead of LINK_COMMAND_SPEC.  The command spec is better for
 267    specifying the handling of options understood by generic Unix
 268    linkers, and for positional arguments like libraries.  */
 269 #define LINK_COMMAND_SPEC "\
 270 %{!fdump=*:%{!fsyntax-only:%{!c:%{!M:%{!MM:%{!E:%{!S:\
 271     %(linker) %l %X %{d} %{s} %{t} %{Z} %{u*} \
 272     %{A} %{e*} %{m} %{r} %{x} \
 273     %{o*}%{!o:-o a.out} \
 274     %{!A:%{!nostdlib:%{!nostartfiles:%S}}} \
 275     %{L*} %{fopenmp:%:include(libgomp.spec)%(link_gomp)}   \
 276     %(link_libgcc) %o %{fprofile-arcs|fprofile-generate*|coverage:-lgcov} \
 277     %{!nostdlib:%{!nodefaultlibs:%(link_ssp) %G %L}} \
 278     %{!A:%{!nostdlib:%{!nostartfiles:%E}}} %{T*} %{F*} }}}}}}}\n\
 279 %{!fdump=*:%{!fsyntax-only:%{!c:%{!M:%{!MM:%{!E:%{!S:\
 280     %{.c|.cc|.C|.cpp|.cp|.c++|.cxx|.CPP|.m|.mm: \
 281     %{gdwarf-2:%{!gstabs*:%{!g0: dsymutil %{o*:%*}%{!o:a.out}}}}}}}}}}}}"
 282
 283 #ifdef TARGET_SYSTEM_ROOT
 284 #define LINK_SYSROOT_SPEC \
 285   "%{isysroot*:-syslibroot %*;:-syslibroot " TARGET_SYSTEM_ROOT "}"
 286 #else
 287 #define LINK_SYSROOT_SPEC "%{isysroot*:-syslibroot %*}"
 288 #endif
 289
 290 /* Please keep the random linker options in alphabetical order (modulo
 291    'Z' and 'no' prefixes). Note that options taking arguments may appear
 292    multiple times on a command line with different arguments each time,
 293    so put a * after their names so all of them get passed.  */
 294 #define LINK_SPEC  \
 295   "%{static}%{!static:-dynamic} \
 296    %{fgnu-runtime:%:replace-outfile(-lobjc -lobjc-gnu)}\
 297    %{static|static-libgfortran:%:replace-outfile(-lgfortran libgfortran.a%s)}\
 298    %{!Zdynamiclib: \
 299      %{Zforce_cpusubtype_ALL:-arch %(darwin_arch) -force_cpusubtype_ALL} \
 300      %{!Zforce_cpusubtype_ALL:-arch %(darwin_subarch)} \
 301      %{Zbundle:-bundle} \
 302      %{Zbundle_loader*:-bundle_loader %*} \
 303      %{client_name*} \
 304      %{compatibility_version*:%e-compatibility_version only allowed with -dynamiclib\
 305 } \
 306      %{current_version*:%e-current_version only allowed with -dynamiclib} \
 307      %{Zforce_flat_namespace:-force_flat_namespace} \
 308      %{Zinstall_name*:%e-install_name only allowed with -dynamiclib} \
 309      %{keep_private_externs} \
 310      %{private_bundle} \
 311     } \
 312    %{Zdynamiclib: -dylib \
 313      %{Zbundle:%e-bundle not allowed with -dynamiclib} \
 314      %{Zbundle_loader*:%e-bundle_loader not allowed with -dynamiclib} \
 315      %{client_name*:%e-client_name not allowed with -dynamiclib} \
 316      %{compatibility_version*:-dylib_compatibility_version %*} \
 317      %{current_version*:-dylib_current_version %*} \
 318      %{Zforce_cpusubtype_ALL:-arch %(darwin_arch)} \
 319      %{!Zforce_cpusubtype_ALL: -arch %(darwin_subarch)} \
 320      %{Zforce_flat_namespace:%e-force_flat_namespace not allowed with -dynamiclib} \
 321      %{Zinstall_name*:-dylib_install_name %*} \
 322      %{keep_private_externs:%e-keep_private_externs not allowed with -dynamiclib} \
 323      %{private_bundle:%e-private_bundle not allowed with -dynamiclib} \
 324     } \
 325    %{Zall_load:-all_load} \
 326    %{Zallowable_client*:-allowable_client %*} \
 327    %{Zbind_at_load:-bind_at_load} \
 328    %{Zarch_errors_fatal:-arch_errors_fatal} \
 329    %{Zdead_strip:-dead_strip} \
 330    %{Zno_dead_strip_inits_and_terms:-no_dead_strip_inits_and_terms} \
 331    %{Zdylib_file*:-dylib_file %*} \
 332    %{Zdynamic:-dynamic}\
 333    %{Zexported_symbols_list*:-exported_symbols_list %*} \
 334    %{Zflat_namespace:-flat_namespace} \
 335    %{headerpad_max_install_names*} \
 336    %{Zimage_base*:-image_base %*} \
 337    %{Zinit*:-init %*} \
 338    %{!mmacosx-version-min=*:-macosx_version_min %(darwin_minversion)} \
 339    %{mmacosx-version-min=*:-macosx_version_min %*} \
 340    %{nomultidefs} \
 341    %{Zmulti_module:-multi_module} %{Zsingle_module:-single_module} \
 342    %{Zmultiply_defined*:-multiply_defined %*} \
 343    %{!Zmultiply_defined*:%{shared-libgcc: \
 344      %:version-compare(< 10.5 mmacosx-version-min= -multiply_defined) \
 345      %:version-compare(< 10.5 mmacosx-version-min= suppress)}} \
 346    %{Zmultiplydefinedunused*:-multiply_defined_unused %*} \
 347    %{fpie:-pie} \
 348    %{prebind} %{noprebind} %{nofixprebinding} %{prebind_all_twolevel_modules} \
 349    %{read_only_relocs} \
 350    %{sectcreate*} %{sectorder*} %{seg1addr*} %{segprot*} \
 351    %{Zsegaddr*:-segaddr %*} \
 352    %{Zsegs_read_only_addr*:-segs_read_only_addr %*} \
 353    %{Zsegs_read_write_addr*:-segs_read_write_addr %*} \
 354    %{Zseg_addr_table*: -seg_addr_table %*} \
 355    %{Zfn_seg_addr_table_filename*:-seg_addr_table_filename %*} \
 356    %{sub_library*} %{sub_umbrella*} \
 357    " LINK_SYSROOT_SPEC " \
 358    %{twolevel_namespace} %{twolevel_namespace_hints} \
 359    %{Zumbrella*: -umbrella %*} \
 360    %{undefined*} \
 361    %{Zunexported_symbols_list*:-unexported_symbols_list %*} \
 362    %{Zweak_reference_mismatches*:-weak_reference_mismatches %*} \
 363    %{!Zweak_reference_mismatches*:-weak_reference_mismatches non-weak} \
 364    %{X} \
 365    %{y*} \
 366    %{w} \
 367    %{pagezero_size*} %{segs_read_*} %{seglinkedit} %{noseglinkedit}  \
 368    %{sectalign*} %{sectobjectsymbols*} %{segcreate*} %{whyload} \
 369    %{whatsloaded} %{dylinker_install_name*} \
 370    %{dylinker} %{Mach} "
 371
 372
 373 /* Machine dependent libraries.  */
 374
 375 #define LIB_SPEC "%{!static:-lSystem}"
 376
 377 /* Support -mmacosx-version-min by supplying different (stub) libgcc_s.dylib
 378    libraries to link against, and by not linking against libgcc_s on
 379    earlier-than-10.3.9.
 380
 381    Note that by default, -lgcc_eh is not linked against!  This is
 382    because in a future version of Darwin the EH frame information may
 383    be in a new format, or the fallback routine might be changed; if
 384    you want to explicitly link against the static version of those
 385    routines, because you know you don't need to unwind through system
 386    libraries, you need to explicitly say -static-libgcc.
 387
 388    If it is linked against, it has to be before -lgcc, because it may
 389    need symbols from -lgcc.  */
 390 #undef REAL_LIBGCC_SPEC
 391 #define REAL_LIBGCC_SPEC                                                   \
 392    "%{static-libgcc|static: -lgcc_eh -lgcc;                                \
 393       shared-libgcc|fexceptions|fgnu-runtime:                              \
 394        %:version-compare(!> 10.5 mmacosx-version-min= -lgcc_s.10.4)        \
 395        %:version-compare(>= 10.5 mmacosx-version-min= -lgcc_s.10.5)        \
 396        -lgcc;                                                              \
 397       :%:version-compare(>< 10.3.9 10.5 mmacosx-version-min= -lgcc_s.10.4) \
 398        %:version-compare(>= 10.5 mmacosx-version-min= -lgcc_s.10.5)        \
 399        -lgcc}"
 400
 401 /* We specify crt0.o as -lcrt0.o so that ld will search the library path.
 402
 403    crt3.o provides __cxa_atexit on systems that don't have it.  Since
 404    it's only used with C++, which requires passing -shared-libgcc, key
 405    off that to avoid unnecessarily adding a destructor to every
 406    powerpc program built.  */
 407
 408 #undef  STARTFILE_SPEC
 409 #define STARTFILE_SPEC                                                      \
 410   "%{Zdynamiclib: %(darwin_dylib1) }                                        \
 411    %{!Zdynamiclib:%{Zbundle:%{!static:-lbundle1.o}}                         \
 412      %{!Zbundle:%{pg:%{static:-lgcrt0.o}                                    \
 413                      %{!static:%{object:-lgcrt0.o}                          \
 414                                %{!object:%{preload:-lgcrt0.o}               \
 415                                  %{!preload:-lgcrt1.o %(darwin_crt2)}}}}    \
 416                 %{!pg:%{static:-lcrt0.o}                                    \
 417                       %{!static:%{object:-lcrt0.o}                          \
 418                                 %{!object:%{preload:-lcrt0.o}               \
 419                                   %{!preload: %(darwin_crt1)                \
 420                                               %(darwin_crt2)}}}}}}          \
 421   %{shared-libgcc:%:version-compare(< 10.5 mmacosx-version-min= crt3.o%s)}"
 422
 423 /* The native Darwin linker doesn't necessarily place files in the order
 424    that they're specified on the link line.  Thus, it is pointless
 425    to put anything in ENDFILE_SPEC.  */
 426 /* #define ENDFILE_SPEC "" */
 427
 428 #define DARWIN_EXTRA_SPECS                                              \
 429   { "darwin_crt1", DARWIN_CRT1_SPEC },                                  \
 430   { "darwin_dylib1", DARWIN_DYLIB1_SPEC },                              \
 431   { "darwin_minversion", DARWIN_MINVERSION_SPEC },
 432
 433 #define DARWIN_DYLIB1_SPEC                                              \
 434   "%:version-compare(!> 10.5 mmacosx-version-min= -ldylib1.o)           \
 435    %:version-compare(>= 10.5 mmacosx-version-min= -ldylib1.10.5.o)"
 436
 437 #define DARWIN_CRT1_SPEC                                                \
 438   "%:version-compare(!> 10.5 mmacosx-version-min= -lcrt1.o)             \
 439    %:version-compare(>= 10.5 mmacosx-version-min= -lcrt1.10.5.o)"
 440
 441 /* Default Darwin ASM_SPEC, very simple.  */
 442 #define ASM_SPEC "-arch %(darwin_arch) \
 443   %{Zforce_cpusubtype_ALL:-force_cpusubtype_ALL}"
 444
 445 /* We still allow output of STABS.  */
 446
 447 #define DBX_DEBUGGING_INFO 1
 448
 449 #define DWARF2_DEBUGGING_INFO
 450 #define PREFERRED_DEBUGGING_TYPE DBX_DEBUG
 451
 452 #define DEBUG_FRAME_SECTION     "__DWARF,__debug_frame,regular,debug"
 453 #define DEBUG_INFO_SECTION      "__DWARF,__debug_info,regular,debug"
 454 #define DEBUG_ABBREV_SECTION    "__DWARF,__debug_abbrev,regular,debug"
 455 #define DEBUG_ARANGES_SECTION   "__DWARF,__debug_aranges,regular,debug"
 456 #define DEBUG_MACINFO_SECTION   "__DWARF,__debug_macinfo,regular,debug"
 457 #define DEBUG_LINE_SECTION      "__DWARF,__debug_line,regular,debug"
 458 #define DEBUG_LOC_SECTION       "__DWARF,__debug_loc,regular,debug"
 459 #define DEBUG_PUBNAMES_SECTION  "__DWARF,__debug_pubnames,regular,debug"
 460 #define DEBUG_PUBTYPES_SECTION  "__DWARF,__debug_pubtypes,regular,debug"
 461 #define DEBUG_STR_SECTION       "__DWARF,__debug_str,regular,debug"
 462 #define DEBUG_RANGES_SECTION    "__DWARF,__debug_ranges,regular,debug"
 463
 464 /* When generating stabs debugging, use N_BINCL entries.  */
 465
 466 #define DBX_USE_BINCL
 467
 468 /* There is no limit to the length of stabs strings.  */
 469
 470 #define DBX_CONTIN_LENGTH 0
 471
 472 /* gdb needs a null N_SO at the end of each file for scattered loading.  */
 473
 474 #define DBX_OUTPUT_NULL_N_SO_AT_MAIN_SOURCE_FILE_END
 475
 476 /* GCC's definition of 'one_only' is the same as its definition of 'weak'.  */
 477 #define MAKE_DECL_ONE_ONLY(DECL) (DECL_WEAK (DECL) = 1)
 478
 479 /* Mach-O supports 'weak imports', and 'weak definitions' in coalesced
 480    sections.  machopic_select_section ensures that weak variables go in
 481    coalesced sections.  Weak aliases (or any other kind of aliases) are
 482    not supported.  Weak symbols that aren't visible outside the .s file
 483    are not supported.  */
 484 #define ASM_WEAKEN_DECL(FILE, DECL, NAME, ALIAS)                        \
 485   do {                                                                  \
 486     if (ALIAS)                                                          \
 487       {                                                                 \
 488         warning (0, "alias definitions not supported in Mach-O; ignored");      \
 489         break;                                                          \
 490       }                                                                 \
 491                                                                         \
 492     if (! DECL_EXTERNAL (DECL) && TREE_PUBLIC (DECL))                   \
 493       targetm.asm_out.globalize_label (FILE, NAME);                     \
 494     if (DECL_EXTERNAL (DECL))                                           \
 495       fputs ("\t.weak_reference ", FILE);                               \
 496     else if (! lookup_attribute ("weak", DECL_ATTRIBUTES (DECL))        \
 497         && lookup_attribute ("weak_import", DECL_ATTRIBUTES (DECL)))    \
 498       break;                                                            \
 499     else if (TREE_PUBLIC (DECL))                                        \
 500       fputs ("\t.weak_definition ", FILE);                              \
 501     else                                                                \
 502       break;                                                            \
 503     assemble_name (FILE, NAME);                                         \
 504     fputc ('\n', FILE);                                                 \
 505   } while (0)
 506
 507 /* Darwin has the pthread routines in libSystem, which every program
 508    links to, so there's no need for weak-ness for that.  */
 509 #define GTHREAD_USE_WEAK 0
 510
 511 /* The Darwin linker imposes two limitations on common symbols: they
 512    can't have hidden visibility, and they can't appear in dylibs.  As
 513    a consequence, we should never use common symbols to represent
 514    vague linkage. */
 515 #undef USE_COMMON_FOR_ONE_ONLY
 516 #define USE_COMMON_FOR_ONE_ONLY 0
 517
 518 /* The Darwin linker doesn't want coalesced symbols to appear in
 519    a static archive's table of contents. */
 520 #undef TARGET_WEAK_NOT_IN_ARCHIVE_TOC
 521 #define TARGET_WEAK_NOT_IN_ARCHIVE_TOC 1
 522
 523 /* On Darwin, we don't (at the time of writing) have linkonce sections
 524    with names, so it's safe to make the class data not comdat.  */
 525 #define TARGET_CXX_CLASS_DATA_ALWAYS_COMDAT hook_bool_void_false
 526
 527 /* For efficiency, on Darwin the RTTI information that is always
 528    emitted in the standard C++ library should not be COMDAT.  */
 529 #define TARGET_CXX_LIBRARY_RTTI_COMDAT hook_bool_void_false
 530
 531 /* We make exception information linkonce. */
 532 #undef TARGET_USES_WEAK_UNWIND_INFO
 533 #define TARGET_USES_WEAK_UNWIND_INFO 1
 534
 535 /* We need to use a nonlocal label for the start of an EH frame: the
 536    Darwin linker requires that a coalesced section start with a label.
 537    Unfortunately, it also requires that 'debug' sections don't contain
 538    labels.  */
 539 #undef FRAME_BEGIN_LABEL
 540 #define FRAME_BEGIN_LABEL (for_eh ? "EH_frame" : "Lframe")
 541
 542 /* Emit a label for the FDE corresponding to DECL.  EMPTY means
 543    emit a label for an empty FDE. */
 544 #define TARGET_ASM_EMIT_UNWIND_LABEL darwin_emit_unwind_label
 545
 546 /* Emit a label to separate the exception table.  */
 547 #define TARGET_ASM_EMIT_EXCEPT_TABLE_LABEL darwin_emit_except_table_label
 548
 549 /* Our profiling scheme doesn't LP labels and counter words.  */
 550
 551 #define NO_PROFILE_COUNTERS     1
 552
 553 #undef  INIT_SECTION_ASM_OP
 554 #define INIT_SECTION_ASM_OP
 555
 556 #undef  INVOKE__main
 557
 558 #define TARGET_ASM_CONSTRUCTOR  machopic_asm_out_constructor
 559 #define TARGET_ASM_DESTRUCTOR   machopic_asm_out_destructor
 560
 561 /* Always prefix with an underscore.  */
 562
 563 #define USER_LABEL_PREFIX "_"
 564
 565 /* A dummy symbol that will be replaced with the function base name.  */
 566 #define MACHOPIC_FUNCTION_BASE_NAME "<pic base>"
 567
 568 /* Don't output a .file directive.  That is only used by the assembler for
 569    error reporting.  */
 570 #undef  TARGET_ASM_FILE_START_FILE_DIRECTIVE
 571 #define TARGET_ASM_FILE_START_FILE_DIRECTIVE false
 572
 573 #undef  TARGET_ASM_FILE_END
 574 #define TARGET_ASM_FILE_END darwin_file_end
 575
 576 #define ASM_OUTPUT_SKIP(FILE,SIZE)  \
 577   fprintf (FILE, "\t.space "HOST_WIDE_INT_PRINT_UNSIGNED"\n", SIZE)
 578
 579 /* Give ObjC methods pretty symbol names.  */
 580
 581 #undef  OBJC_GEN_METHOD_LABEL
 582 #define OBJC_GEN_METHOD_LABEL(BUF,IS_INST,CLASS_NAME,CAT_NAME,SEL_NAME,NUM) \
 583   do { if (CAT_NAME)                                                    \
 584          sprintf (BUF, "%c[%s(%s) %s]", (IS_INST) ? '-' : '+',          \
 585                   (CLASS_NAME), (CAT_NAME), (SEL_NAME));                \
 586        else                                                             \
 587          sprintf (BUF, "%c[%s %s]", (IS_INST) ? '-' : '+',              \
 588                   (CLASS_NAME), (SEL_NAME));                            \
 589      } while (0)
 590
 591 /* The RTTI data (e.g., __ti4name) is common and public (and static),
 592    but it does need to be referenced via indirect PIC data pointers.
 593    The machopic_define_symbol calls are telling the machopic subsystem
 594    that the name *is* defined in this module, so it doesn't need to
 595    make them indirect.  */
 596
 597 #undef ASM_DECLARE_OBJECT_NAME
 598 #define ASM_DECLARE_OBJECT_NAME(FILE, NAME, DECL)                       \
 599   do {                                                                  \
 600     const char *xname = NAME;                                           \
 601     if (GET_CODE (XEXP (DECL_RTL (DECL), 0)) != SYMBOL_REF)             \
 602       xname = IDENTIFIER_POINTER (DECL_NAME (DECL));                    \
 603     if (! DECL_WEAK (DECL)                                              \
 604         && ((TREE_STATIC (DECL)                                         \
 605              && (!DECL_COMMON (DECL) || !TREE_PUBLIC (DECL)))           \
 606             || DECL_INITIAL (DECL)))                                    \
 607         machopic_define_symbol (DECL_RTL (DECL));                       \
 608     if ((TREE_STATIC (DECL)                                             \
 609          && (!DECL_COMMON (DECL) || !TREE_PUBLIC (DECL)))               \
 610         || DECL_INITIAL (DECL))                                         \
 611       (* targetm.encode_section_info) (DECL, DECL_RTL (DECL), false);   \
 612     ASM_OUTPUT_LABEL (FILE, xname);                                     \
 613     /* Darwin doesn't support zero-size objects, so give them a         \
 614        byte.  */                                                        \
 615     if (tree_low_cst (DECL_SIZE_UNIT (DECL), 1) == 0)                   \
 616       assemble_zeros (1);                                               \
 617   } while (0)
 618
 619 #define ASM_DECLARE_FUNCTION_NAME(FILE, NAME, DECL)                     \
 620   do {                                                                  \
 621     const char *xname = NAME;                                           \
 622     if (GET_CODE (XEXP (DECL_RTL (DECL), 0)) != SYMBOL_REF)             \
 623       xname = IDENTIFIER_POINTER (DECL_NAME (DECL));                    \
 624     if (! DECL_WEAK (DECL)                                              \
 625         && ((TREE_STATIC (DECL)                                         \
 626              && (!DECL_COMMON (DECL) || !TREE_PUBLIC (DECL)))           \
 627             || DECL_INITIAL (DECL)))                                    \
 628         machopic_define_symbol (DECL_RTL (DECL));                       \
 629     if ((TREE_STATIC (DECL)                                             \
 630          && (!DECL_COMMON (DECL) || !TREE_PUBLIC (DECL)))               \
 631         || DECL_INITIAL (DECL))                                         \
 632       (* targetm.encode_section_info) (DECL, DECL_RTL (DECL), false);   \
 633     ASM_OUTPUT_LABEL (FILE, xname);                                     \
 634   } while (0)
 635
 636 #define ASM_DECLARE_CONSTANT_NAME(FILE, NAME, EXP, SIZE)        \
 637   do {                                                          \
 638     ASM_OUTPUT_LABEL (FILE, NAME);                              \
 639     /* Darwin doesn't support zero-size objects, so give them a \
 640        byte.  */                                                \
 641     if ((SIZE) == 0)                                            \
 642       assemble_zeros (1);                                       \
 643   } while (0)
 644
 645 /* Wrap new method names in quotes so the assembler doesn't gag.
 646    Make Objective-C internal symbols local.  */
 647
 648 #undef  ASM_OUTPUT_LABELREF
 649 #define ASM_OUTPUT_LABELREF(FILE,NAME)                                       \
 650   do {                                                                       \
 651        const char *xname = (NAME);                                           \
 652        if (! strcmp (xname, MACHOPIC_FUNCTION_BASE_NAME))                    \
 653          machopic_output_function_base_name(FILE);                           \
 654        else if (xname[0] == '&' || xname[0] == '*')                          \
 655          {                                                                   \
 656            int len = strlen (xname);                                         \
 657            if (len > 6 && !strcmp ("$stub", xname + len - 5))                \
 658              machopic_validate_stub_or_non_lazy_ptr (xname);                 \
 659            else if (len > 7 && !strcmp ("$stub\"", xname + len - 6))         \
 660              machopic_validate_stub_or_non_lazy_ptr (xname);                 \
 661            else if (len > 14 && !strcmp ("$non_lazy_ptr", xname + len - 13)) \
 662              machopic_validate_stub_or_non_lazy_ptr (xname);                 \
 663            else if (len > 15 && !strcmp ("$non_lazy_ptr\"", xname + len - 14)) \
 664              machopic_validate_stub_or_non_lazy_ptr (xname);                 \
 665            if (xname[1] != '"' && name_needs_quotes (&xname[1]))             \
 666              fprintf (FILE, "\"%s\"", &xname[1]);                            \
 667            else                                                              \
 668              fputs (&xname[1], FILE);                                        \
 669          }                                                                   \
 670        else if (xname[0] == '+' || xname[0] == '-')                          \
 671          fprintf (FILE, "\"%s\"", xname);                                    \
 672        else if (!strncmp (xname, "_OBJC_", 6))                               \
 673          fprintf (FILE, "L%s", xname);                                       \
 674        else if (!strncmp (xname, ".objc_class_name_", 17))                   \
 675          fprintf (FILE, "%s", xname);                                        \
 676        else if (xname[0] != '"' && name_needs_quotes (xname))                \
 677          fprintf (FILE, "\"%s\"", xname);                                    \
 678        else                                                                  \
 679          asm_fprintf (FILE, "%U%s", xname);                                  \
 680   } while (0)
 681
 682 /* Output before executable code.  */
 683 #undef TEXT_SECTION_ASM_OP
 684 #define TEXT_SECTION_ASM_OP "\t.text"
 685
 686 /* Output before writable data.  */
 687
 688 #undef DATA_SECTION_ASM_OP
 689 #define DATA_SECTION_ASM_OP "\t.data"
 690
 691 #undef  ALIGN_ASM_OP
 692 #define ALIGN_ASM_OP            ".align"
 693
 694 #undef  ASM_OUTPUT_ALIGN
 695 #define ASM_OUTPUT_ALIGN(FILE,LOG)      \
 696   if ((LOG) != 0)                       \
 697     fprintf (FILE, "\t%s %d\n", ALIGN_ASM_OP, (LOG))
 698
 699 /* Ensure correct alignment of bss data.  */
 700
 701 #undef  ASM_OUTPUT_ALIGNED_DECL_LOCAL
 702 #define ASM_OUTPUT_ALIGNED_DECL_LOCAL(FILE, DECL, NAME, SIZE, ALIGN)    \
 703   do {                                                                  \
 704     unsigned HOST_WIDE_INT _new_size = SIZE;                            \
 705     fputs (".lcomm ", (FILE));                                          \
 706     assemble_name ((FILE), (NAME));                                     \
 707     if (_new_size == 0) _new_size = 1;                                  \
 708     fprintf ((FILE), ","HOST_WIDE_INT_PRINT_UNSIGNED",%u\n", _new_size, \
 709              floor_log2 ((ALIGN) / BITS_PER_UNIT));                     \
 710     if ((DECL) && ((TREE_STATIC (DECL)                                  \
 711          && (!DECL_COMMON (DECL) || !TREE_PUBLIC (DECL)))               \
 712         || DECL_INITIAL (DECL)))                                        \
 713       {                                                                 \
 714         (* targetm.encode_section_info) (DECL, DECL_RTL (DECL), false); \
 715         machopic_define_symbol (DECL_RTL (DECL));                       \
 716       }                                                                 \
 717   } while (0)
 718
 719 /* The maximum alignment which the object file format can support in
 720    bits.  For Mach-O, this is 2^15 bytes.  */
 721
 722 #undef  MAX_OFILE_ALIGNMENT
 723 #define MAX_OFILE_ALIGNMENT (0x8000 * 8)
 724
 725 /* Declare the section variables.  */
 726 #ifndef USED_FOR_TARGET
 727 enum darwin_section_enum {
 728 #define DEF_SECTION(NAME, FLAGS, DIRECTIVE, OBJC) NAME,
 729 #include "darwin-sections.def"
 730 #undef DEF_SECTION
 731   NUM_DARWIN_SECTIONS
 732 };
 733 extern GTY(()) section * darwin_sections[NUM_DARWIN_SECTIONS];
 734 #endif
 735
 736 #undef  TARGET_ASM_SELECT_SECTION
 737 #define TARGET_ASM_SELECT_SECTION machopic_select_section
 738 #define USE_SELECT_SECTION_FOR_FUNCTIONS
 739
 740 #undef  TARGET_ASM_SELECT_RTX_SECTION
 741 #define TARGET_ASM_SELECT_RTX_SECTION machopic_select_rtx_section
 742 #undef  TARGET_ASM_UNIQUE_SECTION
 743 #define TARGET_ASM_UNIQUE_SECTION darwin_unique_section
 744 #undef  TARGET_ASM_FUNCTION_RODATA_SECTION
 745 #define TARGET_ASM_FUNCTION_RODATA_SECTION default_no_function_rodata_section
 746 #undef  TARGET_ASM_RELOC_RW_MASK
 747 #define TARGET_ASM_RELOC_RW_MASK machopic_reloc_rw_mask
 748
 749
 750 #define ASM_DECLARE_UNRESOLVED_REFERENCE(FILE,NAME)                     \
 751     do {                                                                \
 752          if (FILE) {                                                    \
 753            if (MACHOPIC_INDIRECT)                                       \
 754              fprintf (FILE, "\t.lazy_reference ");                      \
 755            else                                                         \
 756              fprintf (FILE, "\t.reference ");                           \
 757            assemble_name (FILE, NAME);                                  \
 758            fprintf (FILE, "\n");                                        \
 759          }                                                              \
 760        } while (0)
 761
 762 #define ASM_DECLARE_CLASS_REFERENCE(FILE,NAME)                          \
 763     do {                                                                \
 764          if (FILE) {                                                    \
 765            fprintf (FILE, "\t");                                        \
 766            assemble_name (FILE, NAME);                                  \
 767            fprintf (FILE, "=0\n");                                      \
 768            (*targetm.asm_out.globalize_label) (FILE, NAME);             \
 769          }                                                              \
 770        } while (0)
 771
 772 /* Globalizing directive for a label.  */
 773 #define GLOBAL_ASM_OP ".globl "
 774 #define TARGET_ASM_GLOBALIZE_LABEL darwin_globalize_label
 775
 776 /* Emit an assembler directive to set visibility for a symbol.  Used
 777    to support visibility attribute and Darwin's private extern
 778    feature.  */
 779 #undef TARGET_ASM_ASSEMBLE_VISIBILITY
 780 #define TARGET_ASM_ASSEMBLE_VISIBILITY darwin_assemble_visibility
 781
 782 /* Extra attributes for Darwin.  */
 783 #define SUBTARGET_ATTRIBUTE_TABLE                                            \
 784   /* { name, min_len, max_len, decl_req, type_req, fn_type_req, handler } */ \
 785   { "apple_kext_compatibility", 0, 0, false, true, false,                    \
 786     darwin_handle_kext_attribute },                                          \
 787   { "weak_import", 0, 0, true, false, false,                                 \
 788     darwin_handle_weak_import_attribute }
 789
 790 #undef ASM_GENERATE_INTERNAL_LABEL
 791 #define ASM_GENERATE_INTERNAL_LABEL(LABEL,PREFIX,NUM)   \
 792   sprintf (LABEL, "*%s%ld", PREFIX, (long)(NUM))
 793
 794 #undef TARGET_ASM_MARK_DECL_PRESERVED
 795 #define TARGET_ASM_MARK_DECL_PRESERVED darwin_mark_decl_preserved
 796
 797 /* Set on a symbol with SYMBOL_FLAG_FUNCTION or
 798    MACHO_SYMBOL_FLAG_VARIABLE to indicate that the function or
 799    variable has been defined in this translation unit.
 800    When porting Mach-O to new architectures you need to make
 801    sure these aren't clobbered by the backend.  */
 802
 803 #define MACHO_SYMBOL_FLAG_VARIABLE (SYMBOL_FLAG_MACH_DEP)
 804 #define MACHO_SYMBOL_FLAG_DEFINED ((SYMBOL_FLAG_MACH_DEP) << 1)
 805
 806 /* Set on a symbol to indicate when fix-and-continue style code
 807    generation is being used and the symbol refers to a static symbol
 808    that should be rebound from new instances of a translation unit to
 809    the original instance of the data.  */
 810
 811 #define MACHO_SYMBOL_STATIC ((SYMBOL_FLAG_MACH_DEP) << 2)
 812
 813 /* Symbolic names for various things we might know about a symbol.  */
 814
 815 enum machopic_addr_class {
 816   MACHOPIC_UNDEFINED,
 817   MACHOPIC_DEFINED_DATA,
 818   MACHOPIC_UNDEFINED_DATA,
 819   MACHOPIC_DEFINED_FUNCTION,
 820   MACHOPIC_UNDEFINED_FUNCTION
 821 };
 822
 823 /* Macros defining the various PIC cases.  */
 824
 825 #define MACHO_DYNAMIC_NO_PIC_P  (TARGET_DYNAMIC_NO_PIC)
 826 #define MACHOPIC_INDIRECT       (flag_pic || MACHO_DYNAMIC_NO_PIC_P)
 827 #define MACHOPIC_JUST_INDIRECT  (MACHO_DYNAMIC_NO_PIC_P)
 828 #define MACHOPIC_PURE           (flag_pic && ! MACHO_DYNAMIC_NO_PIC_P)
 829
 830 #undef TARGET_ENCODE_SECTION_INFO
 831 #define TARGET_ENCODE_SECTION_INFO  darwin_encode_section_info
 832 #undef TARGET_STRIP_NAME_ENCODING
 833 #define TARGET_STRIP_NAME_ENCODING  default_strip_name_encoding
 834
 835 #define GEN_BINDER_NAME_FOR_STUB(BUF,STUB,STUB_LENGTH)          \
 836   do {                                                          \
 837     const char *const stub_ = (STUB);                           \
 838     char *buffer_ = (BUF);                                      \
 839     strcpy (buffer_, stub_);                                    \
 840     if (stub_[0] == '"')                                        \
 841       {                                                         \
 842         strcpy (buffer_ + (STUB_LENGTH) - 1, "_binder\"");      \
 843       }                                                         \
 844     else                                                        \
 845       {                                                         \
 846         strcpy (buffer_ + (STUB_LENGTH), "_binder");            \
 847       }                                                         \
 848   } while (0)
 849
 850 #define GEN_SYMBOL_NAME_FOR_SYMBOL(BUF,SYMBOL,SYMBOL_LENGTH)    \
 851   do {                                                          \
 852     const char *const symbol_ = (SYMBOL);                       \
 853     char *buffer_ = (BUF);                                      \
 854     if (name_needs_quotes (symbol_) && symbol_[0] != '"')       \
 855       {                                                         \
 856           sprintf (buffer_, "\"%s\"", symbol_);                 \
 857       }                                                         \
 858     else                                                        \
 859       {                                                         \
 860         strcpy (buffer_, symbol_);                              \
 861       }                                                         \
 862   } while (0)
 863
 864 /* Given a symbol name string, create the lazy pointer version
 865    of the symbol name.  */
 866
 867 #define GEN_LAZY_PTR_NAME_FOR_SYMBOL(BUF,SYMBOL,SYMBOL_LENGTH)  \
 868   do {                                                          \
 869     const char *symbol_ = (SYMBOL);                             \
 870     char *buffer_ = (BUF);                                      \
 871     if (symbol_[0] == '"')                                      \
 872       {                                                         \
 873         strcpy (buffer_, "\"L");                                \
 874         strcpy (buffer_ + 2, symbol_ + 1);                      \
 875         strcpy (buffer_ + (SYMBOL_LENGTH), "$lazy_ptr\"");      \
 876       }                                                         \
 877     else if (name_needs_quotes (symbol_))                       \
 878       {                                                         \
 879         strcpy (buffer_, "\"L");                                \
 880         strcpy (buffer_ + 2, symbol_);                          \
 881         strcpy (buffer_ + (SYMBOL_LENGTH) + 2, "$lazy_ptr\"");  \
 882       }                                                         \
 883     else                                                        \
 884       {                                                         \
 885         strcpy (buffer_, "L");                                  \
 886         strcpy (buffer_ + 1, symbol_);                          \
 887         strcpy (buffer_ + (SYMBOL_LENGTH) + 1, "$lazy_ptr");    \
 888       }                                                         \
 889   } while (0)
 890
 891 #define EH_FRAME_SECTION_NAME   "__TEXT"
 892 #define EH_FRAME_SECTION_ATTR ",coalesced,no_toc+strip_static_syms+live_support"
 893
 894 /* Java runtime class list.  */
 895 #define JCR_SECTION_NAME "__DATA,jcr,regular,no_dead_strip"
 896
 897 #undef ASM_PREFERRED_EH_DATA_FORMAT
 898 #define ASM_PREFERRED_EH_DATA_FORMAT(CODE,GLOBAL)  \
 899   (((CODE) == 2 && (GLOBAL) == 1) \
 900    ? (DW_EH_PE_pcrel | DW_EH_PE_indirect | DW_EH_PE_sdata4) : \
 901      ((CODE) == 1 || (GLOBAL) == 0) ? DW_EH_PE_pcrel : DW_EH_PE_absptr)
 902
 903 #define ASM_OUTPUT_DWARF_DELTA(FILE,SIZE,LABEL1,LABEL2)  \
 904   darwin_asm_output_dwarf_delta (FILE, SIZE, LABEL1, LABEL2)
 905
 906 #define ASM_OUTPUT_DWARF_OFFSET(FILE,SIZE,LABEL,BASE)  \
 907   darwin_asm_output_dwarf_offset (FILE, SIZE, LABEL, BASE)
 908
 909 #define ASM_MAYBE_OUTPUT_ENCODED_ADDR_RTX(ASM_OUT_FILE, ENCODING, SIZE, ADDR, DONE)     \
 910       if (ENCODING == ASM_PREFERRED_EH_DATA_FORMAT (2, 1)) {                            \
 911         darwin_non_lazy_pcrel (ASM_OUT_FILE, ADDR);                                     \
 912         goto DONE;                                                                      \
 913       }
 914
 915 /* Experimentally, putting jump tables in text is faster on SPEC.
 916    Also this is needed for correctness for coalesced functions.  */
 917
 918 #ifndef JUMP_TABLES_IN_TEXT_SECTION
 919 #define JUMP_TABLES_IN_TEXT_SECTION 1
 920 #endif
 921
 922 #define TARGET_TERMINATE_DW2_EH_FRAME_INFO false
 923
 924 #define TARGET_ASM_INIT_SECTIONS darwin_init_sections
 925 #undef TARGET_ASM_NAMED_SECTION
 926 #define TARGET_ASM_NAMED_SECTION darwin_asm_named_section
 927
 928 /* Handle pragma weak and pragma pack.  */
 929 #define HANDLE_SYSV_PRAGMA 1
 930
 931 #define HANDLE_PRAGMA_PACK_PUSH_POP 1
 932
 933 #define DARWIN_REGISTER_TARGET_PRAGMAS()                        \
 934   do {                                                          \
 935     if (!flag_preprocess_only)                                  \
 936       cpp_register_pragma (parse_in, NULL, "mark",              \
 937                            darwin_pragma_ignore, false);        \
 938     c_register_pragma (0, "options", darwin_pragma_options);    \
 939     c_register_pragma (0, "segment", darwin_pragma_ignore);     \
 940     c_register_pragma (0, "unused", darwin_pragma_unused);      \
 941     c_register_pragma (0, "ms_struct", darwin_pragma_ms_struct); \
 942   } while (0)
 943
 944 #undef ASM_APP_ON
 945 #define ASM_APP_ON ""
 946 #undef ASM_APP_OFF
 947 #define ASM_APP_OFF ""
 948
 949 void darwin_register_frameworks (const char *, const char *, int);
 950 void darwin_register_objc_includes (const char *, const char *, int);
 951 #define TARGET_EXTRA_PRE_INCLUDES darwin_register_objc_includes
 952 #define TARGET_EXTRA_INCLUDES darwin_register_frameworks
 953
 954 void add_framework_path (char *);
 955 #define TARGET_OPTF add_framework_path
 956
 957 #define TARGET_POSIX_IO
 958
 959 /* All new versions of Darwin have C99 functions.  */
 960
 961 #define TARGET_C99_FUNCTIONS 1
 962
 963 #define WINT_TYPE "int"
 964
 965 /* Every program on darwin links against libSystem which contains the pthread
 966    routines, so there's no need to explicitly call out when doing threaded
 967    work.  */
 968
 969 #undef GOMP_SELF_SPECS
 970 #define GOMP_SELF_SPECS ""
 971
 972 /* Darwin can't support anchors until we can cope with the adjustments
 973    to size that ASM_DECLARE_OBJECT_NAME and ASM_DECLARE_CONSTANT_NAME
 974    when outputting members of an anchor block and the linker can be
 975    taught to keep them together or we find some other suitable
 976    code-gen technique.  */
 977
 978 #if 0
 979 #define TARGET_ASM_OUTPUT_ANCHOR darwin_asm_output_anchor
 980 #else
 981 #define TARGET_ASM_OUTPUT_ANCHOR NULL
 982 #endif
 983
 984 /* Attempt to turn on execute permission for the stack.  This may be
 985     used by INITIALIZE_TRAMPOLINE of the target needs it (that is,
 986     if the target machine can change execute permissions on a page).
 987
 988     There is no way to query the execute permission of the stack, so
 989     we always issue the mprotect() call.
 990
 991     Unfortunately it is not possible to make this namespace-clean.
 992
 993     Also note that no errors should be emitted by this code; it is
 994     considered dangerous for library calls to send messages to
 995     stdout/stderr.  */
 996
 997 #define ENABLE_EXECUTE_STACK                                            \
 998 extern void __enable_execute_stack (void *);                            \
 999 void                                                                    \
1000 __enable_execute_stack (void *addr)                                     \
1001 {                                                                       \
1002    extern int mprotect (void *, size_t, int);                           \
1003    extern int getpagesize (void);                                       \
1004    static int size;                                                     \
1005    static long mask;                                                    \
1006                                                                         \
1007    char *page, *end;                                                    \
1008                                                                         \
1009    if (size == 0)                                                       \
1010      {                                                                  \
1011        size = getpagesize();                                            \
1012        mask = ~((long) size - 1);                                       \
1013      }                                                                  \
1014                                                                         \
1015    page = (char *) (((long) addr) & mask);                              \
1016    end  = (char *) ((((long) (addr + (TARGET_64BIT ? 48 : 40))) & mask) + size); \
1017                                                                         \
1018    /* 7 == PROT_READ | PROT_WRITE | PROT_EXEC */                        \
1019    (void) mprotect (page, end - page, 7);                               \
1020 }
1021
1022 /* For Apple KEXTs, we make the constructors return this to match gcc
1023    2.95.  */
1024 #define TARGET_CXX_CDTOR_RETURNS_THIS (darwin_kextabi_p)
1025 extern int flag_mkernel;
1026 extern int flag_apple_kext;
1027 #define TARGET_KEXTABI flag_apple_kext
1028
1029 #define TARGET_HAS_TARGETCM 1
1030
1031 #ifndef CROSS_DIRECTORY_STRUCTURE
1032 extern void darwin_default_min_version (int * argc, char *** argv);
1033 #define GCC_DRIVER_HOST_INITIALIZATION \
1034   darwin_default_min_version (&argc, &argv)
1035 #endif /* CROSS_DIRECTORY_STRUCTURE */
1036
1037 /* The Apple assembler and linker do not support constructor priorities.  */
1038 #undef SUPPORTS_INIT_PRIORITY
1039 #define SUPPORTS_INIT_PRIORITY 0
1040
1041 #endif /* CONFIG_DARWIN_H */