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
   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*} %(link_libgcc) %o %{fprofile-arcs|fprofile-generate*|coverage:-lgcov} \
 276     %{flto} %{fwhopr} \
 277     %{fopenmp|ftree-parallelize-loops=*: \
 278       %{static|static-libgcc|static-libstdc++|static-libgfortran: libgomp.a%s; : -lgomp } } \
 279     %{!nostdlib:%{!nodefaultlibs: %(link_ssp) %G %L }} \
 280     %{!A:%{!nostdlib:%{!nostartfiles:%E}}} %{T*} %{F*} }}}}}}}\n\
 281 %{!fdump=*:%{!fsyntax-only:%{!c:%{!M:%{!MM:%{!E:%{!S:\
 282     %{.c|.cc|.C|.cpp|.cp|.c++|.cxx|.CPP|.m|.mm: \
 283     %{gdwarf-2:%{!gstabs*:%{!g0: dsymutil %{o*:%*}%{!o:a.out}}}}}}}}}}}}"
 284
 285 #ifdef TARGET_SYSTEM_ROOT
 286 #define LINK_SYSROOT_SPEC \
 287   "%{isysroot*:-syslibroot %*;:-syslibroot " TARGET_SYSTEM_ROOT "}"
 288 #else
 289 #define LINK_SYSROOT_SPEC "%{isysroot*:-syslibroot %*}"
 290 #endif
 291
 292 /* Please keep the random linker options in alphabetical order (modulo
 293    'Z' and 'no' prefixes). Note that options taking arguments may appear
 294    multiple times on a command line with different arguments each time,
 295    so put a * after their names so all of them get passed.  */
 296 #define LINK_SPEC  \
 297   "%{static}%{!static:-dynamic} \
 298    %{fgnu-runtime: %{static|static-libgcc: \
 299                      %:replace-outfile(-lobjc libobjc-gnu.a%s); \
 300                     :%:replace-outfile(-lobjc -lobjc-gnu ) } }\
 301    %{static|static-libgcc|static-libgfortran:%:replace-outfile(-lgfortran libgfortran.a%s)}\
 302    %{static|static-libgcc|static-libstdc++|static-libgfortran:%:replace-outfile(-lgomp libgomp.a%s)}\
 303    %{static|static-libgcc|static-libstdc++:%:replace-outfile(-lstdc++ libstdc++.a%s)}\
 304    %{!Zdynamiclib: \
 305      %{Zforce_cpusubtype_ALL:-arch %(darwin_arch) -force_cpusubtype_ALL} \
 306      %{!Zforce_cpusubtype_ALL:-arch %(darwin_subarch)} \
 307      %{Zbundle:-bundle} \
 308      %{Zbundle_loader*:-bundle_loader %*} \
 309      %{client_name*} \
 310      %{compatibility_version*:%e-compatibility_version only allowed with -dynamiclib\
 311 } \
 312      %{current_version*:%e-current_version only allowed with -dynamiclib} \
 313      %{Zforce_flat_namespace:-force_flat_namespace} \
 314      %{Zinstall_name*:%e-install_name only allowed with -dynamiclib} \
 315      %{keep_private_externs} \
 316      %{private_bundle} \
 317     } \
 318    %{Zdynamiclib: -dylib \
 319      %{Zbundle:%e-bundle not allowed with -dynamiclib} \
 320      %{Zbundle_loader*:%e-bundle_loader not allowed with -dynamiclib} \
 321      %{client_name*:%e-client_name not allowed with -dynamiclib} \
 322      %{compatibility_version*:-dylib_compatibility_version %*} \
 323      %{current_version*:-dylib_current_version %*} \
 324      %{Zforce_cpusubtype_ALL:-arch %(darwin_arch)} \
 325      %{!Zforce_cpusubtype_ALL: -arch %(darwin_subarch)} \
 326      %{Zforce_flat_namespace:%e-force_flat_namespace not allowed with -dynamiclib} \
 327      %{Zinstall_name*:-dylib_install_name %*} \
 328      %{keep_private_externs:%e-keep_private_externs not allowed with -dynamiclib} \
 329      %{private_bundle:%e-private_bundle not allowed with -dynamiclib} \
 330     } \
 331    %{Zall_load:-all_load} \
 332    %{Zallowable_client*:-allowable_client %*} \
 333    %{Zbind_at_load:-bind_at_load} \
 334    %{Zarch_errors_fatal:-arch_errors_fatal} \
 335    %{Zdead_strip:-dead_strip} \
 336    %{Zno_dead_strip_inits_and_terms:-no_dead_strip_inits_and_terms} \
 337    %{Zdylib_file*:-dylib_file %*} \
 338    %{Zdynamic:-dynamic}\
 339    %{Zexported_symbols_list*:-exported_symbols_list %*} \
 340    %{Zflat_namespace:-flat_namespace} \
 341    %{headerpad_max_install_names*} \
 342    %{Zimage_base*:-image_base %*} \
 343    %{Zinit*:-init %*} \
 344    %{!mmacosx-version-min=*:-macosx_version_min %(darwin_minversion)} \
 345    %{mmacosx-version-min=*:-macosx_version_min %*} \
 346    %{nomultidefs} \
 347    %{Zmulti_module:-multi_module} %{Zsingle_module:-single_module} \
 348    %{Zmultiply_defined*:-multiply_defined %*} \
 349    %{!Zmultiply_defined*:%{shared-libgcc: \
 350      %:version-compare(< 10.5 mmacosx-version-min= -multiply_defined) \
 351      %:version-compare(< 10.5 mmacosx-version-min= suppress)}} \
 352    %{Zmultiplydefinedunused*:-multiply_defined_unused %*} \
 353    %{fpie:-pie} \
 354    %{prebind} %{noprebind} %{nofixprebinding} %{prebind_all_twolevel_modules} \
 355    %{read_only_relocs} \
 356    %{sectcreate*} %{sectorder*} %{seg1addr*} %{segprot*} \
 357    %{Zsegaddr*:-segaddr %*} \
 358    %{Zsegs_read_only_addr*:-segs_read_only_addr %*} \
 359    %{Zsegs_read_write_addr*:-segs_read_write_addr %*} \
 360    %{Zseg_addr_table*: -seg_addr_table %*} \
 361    %{Zfn_seg_addr_table_filename*:-seg_addr_table_filename %*} \
 362    %{sub_library*} %{sub_umbrella*} \
 363    " LINK_SYSROOT_SPEC " \
 364    %{twolevel_namespace} %{twolevel_namespace_hints} \
 365    %{Zumbrella*: -umbrella %*} \
 366    %{undefined*} \
 367    %{Zunexported_symbols_list*:-unexported_symbols_list %*} \
 368    %{Zweak_reference_mismatches*:-weak_reference_mismatches %*} \
 369    %{!Zweak_reference_mismatches*:-weak_reference_mismatches non-weak} \
 370    %{X} \
 371    %{y*} \
 372    %{w} \
 373    %{pagezero_size*} %{segs_read_*} %{seglinkedit} %{noseglinkedit}  \
 374    %{sectalign*} %{sectobjectsymbols*} %{segcreate*} %{whyload} \
 375    %{whatsloaded} %{dylinker_install_name*} \
 376    %{dylinker} %{Mach} "
 377
 378
 379 /* Machine dependent libraries.  */
 380
 381 #define LIB_SPEC "%{!static:-lSystem}"
 382
 383 /* Support -mmacosx-version-min by supplying different (stub) libgcc_s.dylib
 384    libraries to link against, and by not linking against libgcc_s on
 385    earlier-than-10.3.9.
 386
 387    Note that by default, -lgcc_eh is not linked against!  This is
 388    because in a future version of Darwin the EH frame information may
 389    be in a new format, or the fallback routine might be changed; if
 390    you want to explicitly link against the static version of those
 391    routines, because you know you don't need to unwind through system
 392    libraries, you need to explicitly say -static-libgcc.
 393
 394    If it is linked against, it has to be before -lgcc, because it may
 395    need symbols from -lgcc.  */
 396 #undef REAL_LIBGCC_SPEC
 397 #define REAL_LIBGCC_SPEC                                                   \
 398    "%{static-libgcc|static: -lgcc_eh -lgcc;                                \
 399       shared-libgcc|fexceptions|fgnu-runtime:                              \
 400        %:version-compare(!> 10.5 mmacosx-version-min= -lgcc_s.10.4)        \
 401        %:version-compare(>= 10.5 mmacosx-version-min= -lgcc_s.10.5)        \
 402        %:version-compare(!> 10.5 mmacosx-version-min= -lgcc_ext.10.4)      \
 403        %:version-compare(>= 10.5 mmacosx-version-min= -lgcc_ext.10.5)      \
 404        -lgcc;                                                              \
 405       :%:version-compare(>< 10.3.9 10.5 mmacosx-version-min= -lgcc_s.10.4) \
 406        %:version-compare(>= 10.5 mmacosx-version-min= -lgcc_s.10.5)        \
 407        %:version-compare(!> 10.5 mmacosx-version-min= -lgcc_ext.10.4)      \
 408        %:version-compare(>= 10.5 mmacosx-version-min= -lgcc_ext.10.5)      \
 409        -lgcc}"
 410
 411 /* We specify crt0.o as -lcrt0.o so that ld will search the library path.
 412
 413    crt3.o provides __cxa_atexit on systems that don't have it.  Since
 414    it's only used with C++, which requires passing -shared-libgcc, key
 415    off that to avoid unnecessarily adding a destructor to every
 416    powerpc program built.  */
 417
 418 #undef  STARTFILE_SPEC
 419 #define STARTFILE_SPEC                                                      \
 420   "%{Zdynamiclib: %(darwin_dylib1) }                                        \
 421    %{!Zdynamiclib:%{Zbundle:%{!static:-lbundle1.o}}                         \
 422      %{!Zbundle:%{pg:%{static:-lgcrt0.o}                                    \
 423                      %{!static:%{object:-lgcrt0.o}                          \
 424                                %{!object:%{preload:-lgcrt0.o}               \
 425                                  %{!preload:-lgcrt1.o %(darwin_crt2)}}}}    \
 426                 %{!pg:%{static:-lcrt0.o}                                    \
 427                       %{!static:%{object:-lcrt0.o}                          \
 428                                 %{!object:%{preload:-lcrt0.o}               \
 429                                   %{!preload: %(darwin_crt1)                \
 430                                               %(darwin_crt2)}}}}}}          \
 431   %{shared-libgcc:%:version-compare(< 10.5 mmacosx-version-min= crt3.o%s)}"
 432
 433 /* The native Darwin linker doesn't necessarily place files in the order
 434    that they're specified on the link line.  Thus, it is pointless
 435    to put anything in ENDFILE_SPEC.  */
 436 /* #define ENDFILE_SPEC "" */
 437
 438 #define DARWIN_EXTRA_SPECS                                              \
 439   { "darwin_crt1", DARWIN_CRT1_SPEC },                                  \
 440   { "darwin_dylib1", DARWIN_DYLIB1_SPEC },                              \
 441   { "darwin_minversion", DARWIN_MINVERSION_SPEC },
 442
 443 #define DARWIN_DYLIB1_SPEC                                              \
 444   "%:version-compare(!> 10.5 mmacosx-version-min= -ldylib1.o)           \
 445    %:version-compare(>= 10.5 mmacosx-version-min= -ldylib1.10.5.o)"
 446
 447 #define DARWIN_CRT1_SPEC                                                \
 448   "%:version-compare(!> 10.5 mmacosx-version-min= -lcrt1.o)             \
 449    %:version-compare(>= 10.5 mmacosx-version-min= -lcrt1.10.5.o)"
 450
 451 /* Default Darwin ASM_SPEC, very simple.  */
 452 #define ASM_SPEC "-arch %(darwin_arch) \
 453   %{Zforce_cpusubtype_ALL:-force_cpusubtype_ALL}"
 454
 455 /* We still allow output of STABS.  */
 456
 457 #define DBX_DEBUGGING_INFO 1
 458
 459 #define DWARF2_DEBUGGING_INFO 1
 460 #define PREFERRED_DEBUGGING_TYPE DBX_DEBUG
 461
 462 #define DEBUG_FRAME_SECTION     "__DWARF,__debug_frame,regular,debug"
 463 #define DEBUG_INFO_SECTION      "__DWARF,__debug_info,regular,debug"
 464 #define DEBUG_ABBREV_SECTION    "__DWARF,__debug_abbrev,regular,debug"
 465 #define DEBUG_ARANGES_SECTION   "__DWARF,__debug_aranges,regular,debug"
 466 #define DEBUG_MACINFO_SECTION   "__DWARF,__debug_macinfo,regular,debug"
 467 #define DEBUG_LINE_SECTION      "__DWARF,__debug_line,regular,debug"
 468 #define DEBUG_LOC_SECTION       "__DWARF,__debug_loc,regular,debug"
 469 #define DEBUG_PUBNAMES_SECTION  "__DWARF,__debug_pubnames,regular,debug"
 470 #define DEBUG_PUBTYPES_SECTION  "__DWARF,__debug_pubtypes,regular,debug"
 471 #define DEBUG_STR_SECTION       "__DWARF,__debug_str,regular,debug"
 472 #define DEBUG_RANGES_SECTION    "__DWARF,__debug_ranges,regular,debug"
 473
 474 /* When generating stabs debugging, use N_BINCL entries.  */
 475
 476 #define DBX_USE_BINCL
 477
 478 /* There is no limit to the length of stabs strings.  */
 479
 480 #define DBX_CONTIN_LENGTH 0
 481
 482 /* gdb needs a null N_SO at the end of each file for scattered loading.  */
 483
 484 #define DBX_OUTPUT_NULL_N_SO_AT_MAIN_SOURCE_FILE_END
 485
 486 /* GCC's definition of 'one_only' is the same as its definition of 'weak'.  */
 487 #define MAKE_DECL_ONE_ONLY(DECL) (DECL_WEAK (DECL) = 1)
 488
 489 /* Mach-O supports 'weak imports', and 'weak definitions' in coalesced
 490    sections.  machopic_select_section ensures that weak variables go in
 491    coalesced sections.  Weak aliases (or any other kind of aliases) are
 492    not supported.  Weak symbols that aren't visible outside the .s file
 493    are not supported.  */
 494 #define ASM_WEAKEN_DECL(FILE, DECL, NAME, ALIAS)                        \
 495   do {                                                                  \
 496     if (ALIAS)                                                          \
 497       {                                                                 \
 498         warning (0, "alias definitions not supported in Mach-O; ignored");      \
 499         break;                                                          \
 500       }                                                                 \
 501                                                                         \
 502     if (! DECL_EXTERNAL (DECL) && TREE_PUBLIC (DECL))                   \
 503       targetm.asm_out.globalize_label (FILE, NAME);                     \
 504     if (DECL_EXTERNAL (DECL))                                           \
 505       fputs ("\t.weak_reference ", FILE);                               \
 506     else if (lookup_attribute ("weak_import", DECL_ATTRIBUTES (DECL)))  \
 507       break;                                                            \
 508     else if (TREE_PUBLIC (DECL))                                        \
 509       fputs ("\t.weak_definition ", FILE);                              \
 510     else                                                                \
 511       break;                                                            \
 512     assemble_name (FILE, NAME);                                         \
 513     fputc ('\n', FILE);                                                 \
 514   } while (0)
 515
 516 /* Darwin has the pthread routines in libSystem, which every program
 517    links to, so there's no need for weak-ness for that.  */
 518 #define GTHREAD_USE_WEAK 0
 519
 520 /* The Darwin linker imposes two limitations on common symbols: they
 521    can't have hidden visibility, and they can't appear in dylibs.  As
 522    a consequence, we should never use common symbols to represent
 523    vague linkage. */
 524 #undef USE_COMMON_FOR_ONE_ONLY
 525 #define USE_COMMON_FOR_ONE_ONLY 0
 526
 527 /* The Darwin linker doesn't want coalesced symbols to appear in
 528    a static archive's table of contents. */
 529 #undef TARGET_WEAK_NOT_IN_ARCHIVE_TOC
 530 #define TARGET_WEAK_NOT_IN_ARCHIVE_TOC 1
 531
 532 /* On Darwin, we don't (at the time of writing) have linkonce sections
 533    with names, so it's safe to make the class data not comdat.  */
 534 #define TARGET_CXX_CLASS_DATA_ALWAYS_COMDAT hook_bool_void_false
 535
 536 /* For efficiency, on Darwin the RTTI information that is always
 537    emitted in the standard C++ library should not be COMDAT.  */
 538 #define TARGET_CXX_LIBRARY_RTTI_COMDAT hook_bool_void_false
 539
 540 /* We make exception information linkonce. */
 541 #undef TARGET_USES_WEAK_UNWIND_INFO
 542 #define TARGET_USES_WEAK_UNWIND_INFO 1
 543
 544 /* We need to use a nonlocal label for the start of an EH frame: the
 545    Darwin linker requires that a coalesced section start with a label.
 546    Unfortunately, it also requires that 'debug' sections don't contain
 547    labels.  */
 548 #undef FRAME_BEGIN_LABEL
 549 #define FRAME_BEGIN_LABEL (for_eh ? "EH_frame" : "Lframe")
 550
 551 /* Emit a label for the FDE corresponding to DECL.  EMPTY means
 552    emit a label for an empty FDE. */
 553 #define TARGET_ASM_EMIT_UNWIND_LABEL darwin_emit_unwind_label
 554
 555 /* Emit a label to separate the exception table.  */
 556 #define TARGET_ASM_EMIT_EXCEPT_TABLE_LABEL darwin_emit_except_table_label
 557
 558 /* Our profiling scheme doesn't LP labels and counter words.  */
 559
 560 #define NO_PROFILE_COUNTERS     1
 561
 562 #undef  INIT_SECTION_ASM_OP
 563 #define INIT_SECTION_ASM_OP
 564
 565 #undef  INVOKE__main
 566
 567 #define TARGET_ASM_CONSTRUCTOR  machopic_asm_out_constructor
 568 #define TARGET_ASM_DESTRUCTOR   machopic_asm_out_destructor
 569
 570 /* Always prefix with an underscore.  */
 571
 572 #define USER_LABEL_PREFIX "_"
 573
 574 /* A dummy symbol that will be replaced with the function base name.  */
 575 #define MACHOPIC_FUNCTION_BASE_NAME "<pic base>"
 576
 577 /* Don't output a .file directive.  That is only used by the assembler for
 578    error reporting.  */
 579 #undef  TARGET_ASM_FILE_START_FILE_DIRECTIVE
 580 #define TARGET_ASM_FILE_START_FILE_DIRECTIVE false
 581
 582 #undef  TARGET_ASM_FILE_END
 583 #define TARGET_ASM_FILE_END darwin_file_end
 584
 585 /* Because Mach-O relocations have a counter from 1 to 255 for the
 586    section number they apply to, it is necessary to output all
 587    normal sections before the LTO sections, to make sure that the
 588    sections that may have relocations always have a section number
 589    smaller than 255.  */
 590 #undef  TARGET_ASM_LTO_START
 591 #define TARGET_ASM_LTO_START darwin_asm_lto_start
 592 #undef  TARGET_ASM_LTO_END
 593 #define TARGET_ASM_LTO_END darwin_asm_lto_end
 594
 595 #define ASM_OUTPUT_SKIP(FILE,SIZE)  \
 596   fprintf (FILE, "\t.space "HOST_WIDE_INT_PRINT_UNSIGNED"\n", SIZE)
 597
 598 /* Give ObjC methods pretty symbol names.  */
 599
 600 #undef  OBJC_GEN_METHOD_LABEL
 601 #define OBJC_GEN_METHOD_LABEL(BUF,IS_INST,CLASS_NAME,CAT_NAME,SEL_NAME,NUM) \
 602   do { if (CAT_NAME)                                                    \
 603          sprintf (BUF, "%c[%s(%s) %s]", (IS_INST) ? '-' : '+',          \
 604                   (CLASS_NAME), (CAT_NAME), (SEL_NAME));                \
 605        else                                                             \
 606          sprintf (BUF, "%c[%s %s]", (IS_INST) ? '-' : '+',              \
 607                   (CLASS_NAME), (SEL_NAME));                            \
 608      } while (0)
 609
 610 /* The RTTI data (e.g., __ti4name) is common and public (and static),
 611    but it does need to be referenced via indirect PIC data pointers.
 612    The machopic_define_symbol calls are telling the machopic subsystem
 613    that the name *is* defined in this module, so it doesn't need to
 614    make them indirect.  */
 615
 616 #undef ASM_DECLARE_OBJECT_NAME
 617 #define ASM_DECLARE_OBJECT_NAME(FILE, NAME, DECL)                       \
 618   do {                                                                  \
 619     const char *xname = NAME;                                           \
 620     if (GET_CODE (XEXP (DECL_RTL (DECL), 0)) != SYMBOL_REF)             \
 621       xname = IDENTIFIER_POINTER (DECL_NAME (DECL));                    \
 622     if (! DECL_WEAK (DECL)                                              \
 623         && ((TREE_STATIC (DECL)                                         \
 624              && (!DECL_COMMON (DECL) || !TREE_PUBLIC (DECL)))           \
 625             || DECL_INITIAL (DECL)))                                    \
 626         machopic_define_symbol (DECL_RTL (DECL));                       \
 627     if ((TREE_STATIC (DECL)                                             \
 628          && (!DECL_COMMON (DECL) || !TREE_PUBLIC (DECL)))               \
 629         || DECL_INITIAL (DECL))                                         \
 630       (* targetm.encode_section_info) (DECL, DECL_RTL (DECL), false);   \
 631     ASM_OUTPUT_LABEL (FILE, xname);                                     \
 632     /* Darwin doesn't support zero-size objects, so give them a         \
 633        byte.  */                                                        \
 634     if (tree_low_cst (DECL_SIZE_UNIT (DECL), 1) == 0)                   \
 635       assemble_zeros (1);                                               \
 636   } while (0)
 637
 638 #define ASM_DECLARE_FUNCTION_NAME(FILE, NAME, DECL)                     \
 639   do {                                                                  \
 640     const char *xname = NAME;                                           \
 641     if (GET_CODE (XEXP (DECL_RTL (DECL), 0)) != SYMBOL_REF)             \
 642       xname = IDENTIFIER_POINTER (DECL_NAME (DECL));                    \
 643     if (! DECL_WEAK (DECL)                                              \
 644         && ((TREE_STATIC (DECL)                                         \
 645              && (!DECL_COMMON (DECL) || !TREE_PUBLIC (DECL)))           \
 646             || DECL_INITIAL (DECL)))                                    \
 647         machopic_define_symbol (DECL_RTL (DECL));                       \
 648     if ((TREE_STATIC (DECL)                                             \
 649          && (!DECL_COMMON (DECL) || !TREE_PUBLIC (DECL)))               \
 650         || DECL_INITIAL (DECL))                                         \
 651       (* targetm.encode_section_info) (DECL, DECL_RTL (DECL), false);   \
 652     ASM_OUTPUT_LABEL (FILE, xname);                                     \
 653   } while (0)
 654
 655 #undef TARGET_ASM_DECLARE_CONSTANT_NAME
 656 #define TARGET_ASM_DECLARE_CONSTANT_NAME darwin_asm_declare_constant_name
 657
 658 /* Wrap new method names in quotes so the assembler doesn't gag.
 659    Make Objective-C internal symbols local and in doing this, we need
 660    to accommodate the name mangling done by c++ on file scope locals.  */
 661
 662
 663 int darwin_label_is_anonymous_local_objc_name (const char *name);
 664
 665 #undef  ASM_OUTPUT_LABELREF
 666 #define ASM_OUTPUT_LABELREF(FILE,NAME)                                       \
 667   do {                                                                       \
 668        const char *xname = (NAME);                                           \
 669        if (! strcmp (xname, MACHOPIC_FUNCTION_BASE_NAME))                    \
 670          machopic_output_function_base_name(FILE);                           \
 671        else if (xname[0] == '&' || xname[0] == '*')                          \
 672          {                                                                   \
 673            int len = strlen (xname);                                         \
 674            if (len > 6 && !strcmp ("$stub", xname + len - 5))                \
 675              machopic_validate_stub_or_non_lazy_ptr (xname);                 \
 676            else if (len > 7 && !strcmp ("$stub\"", xname + len - 6))         \
 677              machopic_validate_stub_or_non_lazy_ptr (xname);                 \
 678            else if (len > 14 && !strcmp ("$non_lazy_ptr", xname + len - 13)) \
 679              machopic_validate_stub_or_non_lazy_ptr (xname);                 \
 680            else if (len > 15 && !strcmp ("$non_lazy_ptr\"", xname + len - 14)) \
 681              machopic_validate_stub_or_non_lazy_ptr (xname);                 \
 682            if (xname[1] != '"' && name_needs_quotes (&xname[1]))             \
 683              fprintf (FILE, "\"%s\"", &xname[1]);                            \
 684            else                                                              \
 685              fputs (&xname[1], FILE);                                        \
 686          }                                                                   \
 687        else if (xname[0] == '+' || xname[0] == '-')                          \
 688          fprintf (FILE, "\"%s\"", xname);                                    \
 689        else if (darwin_label_is_anonymous_local_objc_name (xname))                                   \
 690          fprintf (FILE, "L%s", xname);                                       \
 691        else if (!strncmp (xname, ".objc_class_name_", 17))                   \
 692          fprintf (FILE, "%s", xname);                                        \
 693        else if (xname[0] != '"' && name_needs_quotes (xname))                \
 694          fprintf (FILE, "\"%s\"", xname);                                    \
 695        else                                                                  \
 696          asm_fprintf (FILE, "%U%s", xname);                                  \
 697   } while (0)
 698
 699 /* Output before executable code.  */
 700 #undef TEXT_SECTION_ASM_OP
 701 #define TEXT_SECTION_ASM_OP "\t.text"
 702
 703 /* Output before writable data.  */
 704
 705 #undef DATA_SECTION_ASM_OP
 706 #define DATA_SECTION_ASM_OP "\t.data"
 707
 708 #undef  ALIGN_ASM_OP
 709 #define ALIGN_ASM_OP            ".align"
 710
 711 #undef  ASM_OUTPUT_ALIGN
 712 #define ASM_OUTPUT_ALIGN(FILE,LOG)      \
 713   if ((LOG) != 0)                       \
 714     fprintf (FILE, "\t%s %d\n", ALIGN_ASM_OP, (LOG))
 715
 716 /* Ensure correct alignment of bss data.  */
 717
 718 #undef  ASM_OUTPUT_ALIGNED_DECL_LOCAL
 719 #define ASM_OUTPUT_ALIGNED_DECL_LOCAL(FILE, DECL, NAME, SIZE, ALIGN)    \
 720   do {                                                                  \
 721     unsigned HOST_WIDE_INT _new_size = SIZE;                            \
 722     fputs ("\t.lcomm ", (FILE));                                                \
 723     assemble_name ((FILE), (NAME));                                     \
 724     if (_new_size == 0) _new_size = 1;                                  \
 725     fprintf ((FILE), ","HOST_WIDE_INT_PRINT_UNSIGNED",%u\n", _new_size, \
 726              floor_log2 ((ALIGN) / BITS_PER_UNIT));                     \
 727     if ((DECL) && ((TREE_STATIC (DECL)                                  \
 728          && (!DECL_COMMON (DECL) || !TREE_PUBLIC (DECL)))               \
 729         || DECL_INITIAL (DECL)))                                        \
 730       {                                                                 \
 731         (* targetm.encode_section_info) (DECL, DECL_RTL (DECL), false); \
 732         machopic_define_symbol (DECL_RTL (DECL));                       \
 733       }                                                                 \
 734   } while (0)
 735
 736 /* The maximum alignment which the object file format can support in
 737    bits.  For Mach-O, this is 2^15 bytes.  */
 738
 739 #undef  MAX_OFILE_ALIGNMENT
 740 #define MAX_OFILE_ALIGNMENT (0x8000 * 8)
 741
 742 /* Declare the section variables.  */
 743 #ifndef USED_FOR_TARGET
 744 enum darwin_section_enum {
 745 #define DEF_SECTION(NAME, FLAGS, DIRECTIVE, OBJC) NAME,
 746 #include "darwin-sections.def"
 747 #undef DEF_SECTION
 748   NUM_DARWIN_SECTIONS
 749 };
 750 extern GTY(()) section * darwin_sections[NUM_DARWIN_SECTIONS];
 751 #endif
 752
 753 #undef  TARGET_ASM_SELECT_SECTION
 754 #define TARGET_ASM_SELECT_SECTION machopic_select_section
 755 #define USE_SELECT_SECTION_FOR_FUNCTIONS
 756
 757 #undef  TARGET_ASM_SELECT_RTX_SECTION
 758 #define TARGET_ASM_SELECT_RTX_SECTION machopic_select_rtx_section
 759 #undef  TARGET_ASM_UNIQUE_SECTION
 760 #define TARGET_ASM_UNIQUE_SECTION darwin_unique_section
 761 #undef  TARGET_ASM_FUNCTION_RODATA_SECTION
 762 #define TARGET_ASM_FUNCTION_RODATA_SECTION default_no_function_rodata_section
 763 #undef  TARGET_ASM_RELOC_RW_MASK
 764 #define TARGET_ASM_RELOC_RW_MASK machopic_reloc_rw_mask
 765
 766
 767 #define ASM_DECLARE_UNRESOLVED_REFERENCE(FILE,NAME)                     \
 768     do {                                                                \
 769          if (FILE) {                                                    \
 770            if (MACHOPIC_INDIRECT)                                       \
 771              fprintf (FILE, "\t.lazy_reference ");                      \
 772            else                                                         \
 773              fprintf (FILE, "\t.reference ");                           \
 774            assemble_name (FILE, NAME);                                  \
 775            fprintf (FILE, "\n");                                        \
 776          }                                                              \
 777        } while (0)
 778
 779 #define ASM_DECLARE_CLASS_REFERENCE(FILE,NAME)                          \
 780     do {                                                                \
 781          if (FILE) {                                                    \
 782            fprintf (FILE, "\t");                                        \
 783            assemble_name (FILE, NAME);                                  \
 784            fprintf (FILE, "=0\n");                                      \
 785            (*targetm.asm_out.globalize_label) (FILE, NAME);             \
 786          }                                                              \
 787        } while (0)
 788
 789 /* Globalizing directive for a label.  */
 790 #define GLOBAL_ASM_OP "\t.globl "
 791 #define TARGET_ASM_GLOBALIZE_LABEL darwin_globalize_label
 792
 793 /* Emit an assembler directive to set visibility for a symbol.  Used
 794    to support visibility attribute and Darwin's private extern
 795    feature.  */
 796 #undef TARGET_ASM_ASSEMBLE_VISIBILITY
 797 #define TARGET_ASM_ASSEMBLE_VISIBILITY darwin_assemble_visibility
 798
 799 /* Extra attributes for Darwin.  */
 800 #define SUBTARGET_ATTRIBUTE_TABLE                                            \
 801   /* { name, min_len, max_len, decl_req, type_req, fn_type_req, handler } */ \
 802   { "apple_kext_compatibility", 0, 0, false, true, false,                    \
 803     darwin_handle_kext_attribute },                                          \
 804   { "weak_import", 0, 0, true, false, false,                                 \
 805     darwin_handle_weak_import_attribute }
 806
 807 #undef ASM_GENERATE_INTERNAL_LABEL
 808 #define ASM_GENERATE_INTERNAL_LABEL(LABEL,PREFIX,NUM)   \
 809   sprintf (LABEL, "*%s%ld", PREFIX, (long)(NUM))
 810
 811 #undef TARGET_ASM_MARK_DECL_PRESERVED
 812 #define TARGET_ASM_MARK_DECL_PRESERVED darwin_mark_decl_preserved
 813
 814 /* Set on a symbol with SYMBOL_FLAG_FUNCTION or
 815    MACHO_SYMBOL_FLAG_VARIABLE to indicate that the function or
 816    variable has been defined in this translation unit.
 817    When porting Mach-O to new architectures you need to make
 818    sure these aren't clobbered by the backend.  */
 819
 820 #define MACHO_SYMBOL_FLAG_VARIABLE (SYMBOL_FLAG_MACH_DEP)
 821 #define MACHO_SYMBOL_FLAG_DEFINED ((SYMBOL_FLAG_MACH_DEP) << 1)
 822
 823 /* Set on a symbol to indicate when fix-and-continue style code
 824    generation is being used and the symbol refers to a static symbol
 825    that should be rebound from new instances of a translation unit to
 826    the original instance of the data.  */
 827
 828 #define MACHO_SYMBOL_STATIC ((SYMBOL_FLAG_MACH_DEP) << 2)
 829
 830 /* Symbolic names for various things we might know about a symbol.  */
 831
 832 enum machopic_addr_class {
 833   MACHOPIC_UNDEFINED,
 834   MACHOPIC_DEFINED_DATA,
 835   MACHOPIC_UNDEFINED_DATA,
 836   MACHOPIC_DEFINED_FUNCTION,
 837   MACHOPIC_UNDEFINED_FUNCTION
 838 };
 839
 840 /* Macros defining the various PIC cases.  */
 841
 842 #define MACHO_DYNAMIC_NO_PIC_P  (TARGET_DYNAMIC_NO_PIC)
 843 #define MACHOPIC_INDIRECT       (flag_pic || MACHO_DYNAMIC_NO_PIC_P)
 844 #define MACHOPIC_JUST_INDIRECT  (MACHO_DYNAMIC_NO_PIC_P)
 845 #define MACHOPIC_PURE           (flag_pic && ! MACHO_DYNAMIC_NO_PIC_P)
 846
 847 #undef TARGET_ENCODE_SECTION_INFO
 848 #define TARGET_ENCODE_SECTION_INFO  darwin_encode_section_info
 849 #undef TARGET_STRIP_NAME_ENCODING
 850 #define TARGET_STRIP_NAME_ENCODING  default_strip_name_encoding
 851
 852 #define GEN_BINDER_NAME_FOR_STUB(BUF,STUB,STUB_LENGTH)          \
 853   do {                                                          \
 854     const char *const stub_ = (STUB);                           \
 855     char *buffer_ = (BUF);                                      \
 856     strcpy (buffer_, stub_);                                    \
 857     if (stub_[0] == '"')                                        \
 858       {                                                         \
 859         strcpy (buffer_ + (STUB_LENGTH) - 1, "_binder\"");      \
 860       }                                                         \
 861     else                                                        \
 862       {                                                         \
 863         strcpy (buffer_ + (STUB_LENGTH), "_binder");            \
 864       }                                                         \
 865   } while (0)
 866
 867 #define GEN_SYMBOL_NAME_FOR_SYMBOL(BUF,SYMBOL,SYMBOL_LENGTH)    \
 868   do {                                                          \
 869     const char *const symbol_ = (SYMBOL);                       \
 870     char *buffer_ = (BUF);                                      \
 871     if (name_needs_quotes (symbol_) && symbol_[0] != '"')       \
 872       {                                                         \
 873           sprintf (buffer_, "\"%s\"", symbol_);                 \
 874       }                                                         \
 875     else                                                        \
 876       {                                                         \
 877         strcpy (buffer_, symbol_);                              \
 878       }                                                         \
 879   } while (0)
 880
 881 /* Given a symbol name string, create the lazy pointer version
 882    of the symbol name.  */
 883
 884 #define GEN_LAZY_PTR_NAME_FOR_SYMBOL(BUF,SYMBOL,SYMBOL_LENGTH)  \
 885   do {                                                          \
 886     const char *symbol_ = (SYMBOL);                             \
 887     char *buffer_ = (BUF);                                      \
 888     if (symbol_[0] == '"')                                      \
 889       {                                                         \
 890         strcpy (buffer_, "\"L");                                \
 891         strcpy (buffer_ + 2, symbol_ + 1);                      \
 892         strcpy (buffer_ + (SYMBOL_LENGTH), "$lazy_ptr\"");      \
 893       }                                                         \
 894     else if (name_needs_quotes (symbol_))                       \
 895       {                                                         \
 896         strcpy (buffer_, "\"L");                                \
 897         strcpy (buffer_ + 2, symbol_);                          \
 898         strcpy (buffer_ + (SYMBOL_LENGTH) + 2, "$lazy_ptr\"");  \
 899       }                                                         \
 900     else                                                        \
 901       {                                                         \
 902         strcpy (buffer_, "L");                                  \
 903         strcpy (buffer_ + 1, symbol_);                          \
 904         strcpy (buffer_ + (SYMBOL_LENGTH) + 1, "$lazy_ptr");    \
 905       }                                                         \
 906   } while (0)
 907
 908 #define EH_FRAME_SECTION_NAME   "__TEXT"
 909 #define EH_FRAME_SECTION_ATTR ",coalesced,no_toc+strip_static_syms+live_support"
 910
 911 /* Java runtime class list.  */
 912 #define JCR_SECTION_NAME "__DATA,jcr,regular,no_dead_strip"
 913
 914 #undef ASM_PREFERRED_EH_DATA_FORMAT
 915 #define ASM_PREFERRED_EH_DATA_FORMAT(CODE,GLOBAL)  \
 916   (((CODE) == 2 && (GLOBAL) == 1) \
 917    ? (DW_EH_PE_pcrel | DW_EH_PE_indirect | DW_EH_PE_sdata4) : \
 918      ((CODE) == 1 || (GLOBAL) == 0) ? DW_EH_PE_pcrel : DW_EH_PE_absptr)
 919
 920 #define ASM_OUTPUT_DWARF_DELTA(FILE,SIZE,LABEL1,LABEL2)  \
 921   darwin_asm_output_dwarf_delta (FILE, SIZE, LABEL1, LABEL2)
 922
 923 #define ASM_OUTPUT_DWARF_OFFSET(FILE,SIZE,LABEL,BASE)  \
 924   darwin_asm_output_dwarf_offset (FILE, SIZE, LABEL, BASE)
 925
 926 #define ASM_MAYBE_OUTPUT_ENCODED_ADDR_RTX(ASM_OUT_FILE, ENCODING, SIZE, ADDR, DONE)     \
 927       if (ENCODING == ASM_PREFERRED_EH_DATA_FORMAT (2, 1)) {                            \
 928         darwin_non_lazy_pcrel (ASM_OUT_FILE, ADDR);                                     \
 929         goto DONE;                                                                      \
 930       }
 931
 932 /* Experimentally, putting jump tables in text is faster on SPEC.
 933    Also this is needed for correctness for coalesced functions.  */
 934
 935 #ifndef JUMP_TABLES_IN_TEXT_SECTION
 936 #define JUMP_TABLES_IN_TEXT_SECTION 1
 937 #endif
 938
 939 #define TARGET_TERMINATE_DW2_EH_FRAME_INFO false
 940
 941 #define TARGET_ASM_INIT_SECTIONS darwin_init_sections
 942 #undef TARGET_ASM_NAMED_SECTION
 943 #define TARGET_ASM_NAMED_SECTION darwin_asm_named_section
 944
 945 /* Handle pragma weak and pragma pack.  */
 946 #define HANDLE_SYSV_PRAGMA 1
 947
 948 #define HANDLE_PRAGMA_PACK_PUSH_POP 1
 949
 950 #define DARWIN_REGISTER_TARGET_PRAGMAS()                        \
 951   do {                                                          \
 952     if (!flag_preprocess_only)                                  \
 953       cpp_register_pragma (parse_in, NULL, "mark",              \
 954                            darwin_pragma_ignore, false);        \
 955     c_register_pragma (0, "options", darwin_pragma_options);    \
 956     c_register_pragma (0, "segment", darwin_pragma_ignore);     \
 957     c_register_pragma (0, "unused", darwin_pragma_unused);      \
 958     c_register_pragma (0, "ms_struct", darwin_pragma_ms_struct); \
 959   } while (0)
 960
 961 #undef ASM_APP_ON
 962 #define ASM_APP_ON ""
 963 #undef ASM_APP_OFF
 964 #define ASM_APP_OFF ""
 965
 966 void darwin_register_frameworks (const char *, const char *, int);
 967 void darwin_register_objc_includes (const char *, const char *, int);
 968 #define TARGET_EXTRA_PRE_INCLUDES darwin_register_objc_includes
 969 #define TARGET_EXTRA_INCLUDES darwin_register_frameworks
 970
 971 void add_framework_path (char *);
 972 #define TARGET_OPTF add_framework_path
 973
 974 #define TARGET_POSIX_IO
 975
 976 /* All new versions of Darwin have C99 functions.  */
 977
 978 #define TARGET_C99_FUNCTIONS 1
 979
 980 #define WINT_TYPE "int"
 981
 982 /* Every program on darwin links against libSystem which contains the pthread
 983    routines, so there's no need to explicitly call out when doing threaded
 984    work.  */
 985
 986 #undef GOMP_SELF_SPECS
 987 #define GOMP_SELF_SPECS ""
 988
 989 /* Darwin can't support anchors until we can cope with the adjustments
 990    to size that ASM_DECLARE_OBJECT_NAME and ASM_DECLARE_CONSTANT_NAME
 991    when outputting members of an anchor block and the linker can be
 992    taught to keep them together or we find some other suitable
 993    code-gen technique.  */
 994
 995 #if 0
 996 #define TARGET_ASM_OUTPUT_ANCHOR darwin_asm_output_anchor
 997 #else
 998 #define TARGET_ASM_OUTPUT_ANCHOR NULL
 999 #endif
1000
1001 /* Attempt to turn on execute permission for the stack.  This may be
1002     used by TARGET_TRAMPOLINE_INIT if the target needs it (that is,
1003     if the target machine can change execute permissions on a page).
1004
1005     There is no way to query the execute permission of the stack, so
1006     we always issue the mprotect() call.
1007
1008     Unfortunately it is not possible to make this namespace-clean.
1009
1010     Also note that no errors should be emitted by this code; it is
1011     considered dangerous for library calls to send messages to
1012     stdout/stderr.  */
1013
1014 #define ENABLE_EXECUTE_STACK                                            \
1015 extern void __enable_execute_stack (void *);                            \
1016 void                                                                    \
1017 __enable_execute_stack (void *addr)                                     \
1018 {                                                                       \
1019    extern int mprotect (void *, size_t, int);                           \
1020    extern int getpagesize (void);                                       \
1021    static int size;                                                     \
1022    static long mask;                                                    \
1023                                                                         \
1024    char *page, *end;                                                    \
1025                                                                         \
1026    if (size == 0)                                                       \
1027      {                                                                  \
1028        size = getpagesize();                                            \
1029        mask = ~((long) size - 1);                                       \
1030      }                                                                  \
1031                                                                         \
1032    page = (char *) (((long) addr) & mask);                              \
1033    end  = (char *) ((((long) (addr + (TARGET_64BIT ? 48 : 40))) & mask) + size); \
1034                                                                         \
1035    /* 7 == PROT_READ | PROT_WRITE | PROT_EXEC */                        \
1036    (void) mprotect (page, end - page, 7);                               \
1037 }
1038
1039 /* For Apple KEXTs, we make the constructors return this to match gcc
1040    2.95.  */
1041 #define TARGET_CXX_CDTOR_RETURNS_THIS (darwin_kextabi_p)
1042 extern int flag_mkernel;
1043 extern int flag_apple_kext;
1044 #define TARGET_KEXTABI flag_apple_kext
1045
1046 #define TARGET_HAS_TARGETCM 1
1047
1048 #ifndef CROSS_DIRECTORY_STRUCTURE
1049 extern void darwin_default_min_version (int * argc, char *** argv);
1050 #define GCC_DRIVER_HOST_INITIALIZATION \
1051   darwin_default_min_version (&argc, &argv)
1052 #endif /* CROSS_DIRECTORY_STRUCTURE */
1053
1054 /* The Apple assembler and linker do not support constructor priorities.  */
1055 #undef SUPPORTS_INIT_PRIORITY
1056 #define SUPPORTS_INIT_PRIORITY 0
1057
1058 #endif /* CONFIG_DARWIN_H */