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 #define TARGET_WANT_DEBUG_PUB_SECTIONS true
 475
 476 /* When generating stabs debugging, use N_BINCL entries.  */
 477
 478 #define DBX_USE_BINCL
 479
 480 /* There is no limit to the length of stabs strings.  */
 481
 482 #define DBX_CONTIN_LENGTH 0
 483
 484 /* gdb needs a null N_SO at the end of each file for scattered loading.  */
 485
 486 #define DBX_OUTPUT_NULL_N_SO_AT_MAIN_SOURCE_FILE_END
 487
 488 /* GCC's definition of 'one_only' is the same as its definition of 'weak'.  */
 489 #define MAKE_DECL_ONE_ONLY(DECL) (DECL_WEAK (DECL) = 1)
 490
 491 /* Mach-O supports 'weak imports', and 'weak definitions' in coalesced
 492    sections.  machopic_select_section ensures that weak variables go in
 493    coalesced sections.  Weak aliases (or any other kind of aliases) are
 494    not supported.  Weak symbols that aren't visible outside the .s file
 495    are not supported.  */
 496 #define ASM_WEAKEN_DECL(FILE, DECL, NAME, ALIAS)                        \
 497   do {                                                                  \
 498     if (ALIAS)                                                          \
 499       {                                                                 \
 500         warning (0, "alias definitions not supported in Mach-O; ignored");      \
 501         break;                                                          \
 502       }                                                                 \
 503                                                                         \
 504     if (! DECL_EXTERNAL (DECL) && TREE_PUBLIC (DECL))                   \
 505       targetm.asm_out.globalize_label (FILE, NAME);                     \
 506     if (DECL_EXTERNAL (DECL))                                           \
 507       fputs ("\t.weak_reference ", FILE);                               \
 508     else if (lookup_attribute ("weak_import", DECL_ATTRIBUTES (DECL)))  \
 509       break;                                                            \
 510     else if (TREE_PUBLIC (DECL))                                        \
 511       fputs ("\t.weak_definition ", FILE);                              \
 512     else                                                                \
 513       break;                                                            \
 514     assemble_name (FILE, NAME);                                         \
 515     fputc ('\n', FILE);                                                 \
 516   } while (0)
 517
 518 /* Darwin has the pthread routines in libSystem, which every program
 519    links to, so there's no need for weak-ness for that.  */
 520 #define GTHREAD_USE_WEAK 0
 521
 522 /* The Darwin linker imposes two limitations on common symbols: they
 523    can't have hidden visibility, and they can't appear in dylibs.  As
 524    a consequence, we should never use common symbols to represent
 525    vague linkage. */
 526 #undef USE_COMMON_FOR_ONE_ONLY
 527 #define USE_COMMON_FOR_ONE_ONLY 0
 528
 529 /* The Darwin linker doesn't want coalesced symbols to appear in
 530    a static archive's table of contents. */
 531 #undef TARGET_WEAK_NOT_IN_ARCHIVE_TOC
 532 #define TARGET_WEAK_NOT_IN_ARCHIVE_TOC 1
 533
 534 /* On Darwin, we don't (at the time of writing) have linkonce sections
 535    with names, so it's safe to make the class data not comdat.  */
 536 #define TARGET_CXX_CLASS_DATA_ALWAYS_COMDAT hook_bool_void_false
 537
 538 /* For efficiency, on Darwin the RTTI information that is always
 539    emitted in the standard C++ library should not be COMDAT.  */
 540 #define TARGET_CXX_LIBRARY_RTTI_COMDAT hook_bool_void_false
 541
 542 /* We make exception information linkonce. */
 543 #undef TARGET_USES_WEAK_UNWIND_INFO
 544 #define TARGET_USES_WEAK_UNWIND_INFO 1
 545
 546 /* We need to use a nonlocal label for the start of an EH frame: the
 547    Darwin linker requires that a coalesced section start with a label.
 548    Unfortunately, it also requires that 'debug' sections don't contain
 549    labels.  */
 550 #undef FRAME_BEGIN_LABEL
 551 #define FRAME_BEGIN_LABEL (for_eh ? "EH_frame" : "Lframe")
 552
 553 /* Emit a label for the FDE corresponding to DECL.  EMPTY means
 554    emit a label for an empty FDE. */
 555 #define TARGET_ASM_EMIT_UNWIND_LABEL darwin_emit_unwind_label
 556
 557 /* Emit a label to separate the exception table.  */
 558 #define TARGET_ASM_EMIT_EXCEPT_TABLE_LABEL darwin_emit_except_table_label
 559
 560 /* Our profiling scheme doesn't LP labels and counter words.  */
 561
 562 #define NO_PROFILE_COUNTERS     1
 563
 564 #undef  INIT_SECTION_ASM_OP
 565 #define INIT_SECTION_ASM_OP
 566
 567 #undef  INVOKE__main
 568
 569 #define TARGET_ASM_CONSTRUCTOR  machopic_asm_out_constructor
 570 #define TARGET_ASM_DESTRUCTOR   machopic_asm_out_destructor
 571
 572 /* Always prefix with an underscore.  */
 573
 574 #define USER_LABEL_PREFIX "_"
 575
 576 /* A dummy symbol that will be replaced with the function base name.  */
 577 #define MACHOPIC_FUNCTION_BASE_NAME "<pic base>"
 578
 579 /* Don't output a .file directive.  That is only used by the assembler for
 580    error reporting.  */
 581 #undef  TARGET_ASM_FILE_START_FILE_DIRECTIVE
 582 #define TARGET_ASM_FILE_START_FILE_DIRECTIVE false
 583
 584 #undef  TARGET_ASM_FILE_END
 585 #define TARGET_ASM_FILE_END darwin_file_end
 586
 587 /* Because Mach-O relocations have a counter from 1 to 255 for the
 588    section number they apply to, it is necessary to output all
 589    normal sections before the LTO sections, to make sure that the
 590    sections that may have relocations always have a section number
 591    smaller than 255.  */
 592 #undef  TARGET_ASM_LTO_START
 593 #define TARGET_ASM_LTO_START darwin_asm_lto_start
 594 #undef  TARGET_ASM_LTO_END
 595 #define TARGET_ASM_LTO_END darwin_asm_lto_end
 596
 597 #define ASM_OUTPUT_SKIP(FILE,SIZE)  \
 598   fprintf (FILE, "\t.space "HOST_WIDE_INT_PRINT_UNSIGNED"\n", SIZE)
 599
 600 /* Give ObjC methods pretty symbol names.  */
 601
 602 #undef  OBJC_GEN_METHOD_LABEL
 603 #define OBJC_GEN_METHOD_LABEL(BUF,IS_INST,CLASS_NAME,CAT_NAME,SEL_NAME,NUM) \
 604   do { if (CAT_NAME)                                                    \
 605          sprintf (BUF, "%c[%s(%s) %s]", (IS_INST) ? '-' : '+',          \
 606                   (CLASS_NAME), (CAT_NAME), (SEL_NAME));                \
 607        else                                                             \
 608          sprintf (BUF, "%c[%s %s]", (IS_INST) ? '-' : '+',              \
 609                   (CLASS_NAME), (SEL_NAME));                            \
 610      } while (0)
 611
 612 /* The RTTI data (e.g., __ti4name) is common and public (and static),
 613    but it does need to be referenced via indirect PIC data pointers.
 614    The machopic_define_symbol calls are telling the machopic subsystem
 615    that the name *is* defined in this module, so it doesn't need to
 616    make them indirect.  */
 617
 618 #undef ASM_DECLARE_OBJECT_NAME
 619 #define ASM_DECLARE_OBJECT_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     /* Darwin doesn't support zero-size objects, so give them a         \
 635        byte.  */                                                        \
 636     if (tree_low_cst (DECL_SIZE_UNIT (DECL), 1) == 0)                   \
 637       assemble_zeros (1);                                               \
 638   } while (0)
 639
 640 #define ASM_DECLARE_FUNCTION_NAME(FILE, NAME, DECL)                     \
 641   do {                                                                  \
 642     const char *xname = NAME;                                           \
 643     if (GET_CODE (XEXP (DECL_RTL (DECL), 0)) != SYMBOL_REF)             \
 644       xname = IDENTIFIER_POINTER (DECL_NAME (DECL));                    \
 645     if (! DECL_WEAK (DECL)                                              \
 646         && ((TREE_STATIC (DECL)                                         \
 647              && (!DECL_COMMON (DECL) || !TREE_PUBLIC (DECL)))           \
 648             || DECL_INITIAL (DECL)))                                    \
 649         machopic_define_symbol (DECL_RTL (DECL));                       \
 650     if ((TREE_STATIC (DECL)                                             \
 651          && (!DECL_COMMON (DECL) || !TREE_PUBLIC (DECL)))               \
 652         || DECL_INITIAL (DECL))                                         \
 653       (* targetm.encode_section_info) (DECL, DECL_RTL (DECL), false);   \
 654     ASM_OUTPUT_FUNCTION_LABEL (FILE, xname, DECL);                      \
 655   } while (0)
 656
 657 #undef TARGET_ASM_DECLARE_CONSTANT_NAME
 658 #define TARGET_ASM_DECLARE_CONSTANT_NAME darwin_asm_declare_constant_name
 659
 660 /* Wrap new method names in quotes so the assembler doesn't gag.
 661    Make Objective-C internal symbols local and in doing this, we need
 662    to accommodate the name mangling done by c++ on file scope locals.  */
 663
 664
 665 int darwin_label_is_anonymous_local_objc_name (const char *name);
 666
 667 #undef  ASM_OUTPUT_LABELREF
 668 #define ASM_OUTPUT_LABELREF(FILE,NAME)                                       \
 669   do {                                                                       \
 670        const char *xname = (NAME);                                           \
 671        if (! strcmp (xname, MACHOPIC_FUNCTION_BASE_NAME))                    \
 672          machopic_output_function_base_name(FILE);                           \
 673        else if (xname[0] == '&' || xname[0] == '*')                          \
 674          {                                                                   \
 675            int len = strlen (xname);                                         \
 676            if (len > 6 && !strcmp ("$stub", xname + len - 5))                \
 677              machopic_validate_stub_or_non_lazy_ptr (xname);                 \
 678            else if (len > 7 && !strcmp ("$stub\"", xname + len - 6))         \
 679              machopic_validate_stub_or_non_lazy_ptr (xname);                 \
 680            else if (len > 14 && !strcmp ("$non_lazy_ptr", xname + len - 13)) \
 681              machopic_validate_stub_or_non_lazy_ptr (xname);                 \
 682            else if (len > 15 && !strcmp ("$non_lazy_ptr\"", xname + len - 14)) \
 683              machopic_validate_stub_or_non_lazy_ptr (xname);                 \
 684            if (xname[1] != '"' && name_needs_quotes (&xname[1]))             \
 685              fprintf (FILE, "\"%s\"", &xname[1]);                            \
 686            else                                                              \
 687              fputs (&xname[1], FILE);                                        \
 688          }                                                                   \
 689        else if (xname[0] == '+' || xname[0] == '-')                          \
 690          fprintf (FILE, "\"%s\"", xname);                                    \
 691        else if (darwin_label_is_anonymous_local_objc_name (xname))                                   \
 692          fprintf (FILE, "L%s", xname);                                       \
 693        else if (!strncmp (xname, ".objc_class_name_", 17))                   \
 694          fprintf (FILE, "%s", xname);                                        \
 695        else if (xname[0] != '"' && name_needs_quotes (xname))                \
 696          fprintf (FILE, "\"%s\"", xname);                                    \
 697        else                                                                  \
 698          asm_fprintf (FILE, "%U%s", xname);                                  \
 699   } while (0)
 700
 701 /* Output before executable code.  */
 702 #undef TEXT_SECTION_ASM_OP
 703 #define TEXT_SECTION_ASM_OP "\t.text"
 704
 705 /* Output before writable data.  */
 706
 707 #undef DATA_SECTION_ASM_OP
 708 #define DATA_SECTION_ASM_OP "\t.data"
 709
 710 #undef  ALIGN_ASM_OP
 711 #define ALIGN_ASM_OP            ".align"
 712
 713 #undef  ASM_OUTPUT_ALIGN
 714 #define ASM_OUTPUT_ALIGN(FILE,LOG)      \
 715   if ((LOG) != 0)                       \
 716     fprintf (FILE, "\t%s %d\n", ALIGN_ASM_OP, (LOG))
 717
 718 /* Ensure correct alignment of bss data.  */
 719
 720 #undef  ASM_OUTPUT_ALIGNED_DECL_LOCAL
 721 #define ASM_OUTPUT_ALIGNED_DECL_LOCAL(FILE, DECL, NAME, SIZE, ALIGN)    \
 722   do {                                                                  \
 723     unsigned HOST_WIDE_INT _new_size = SIZE;                            \
 724     fputs ("\t.lcomm ", (FILE));                                                \
 725     assemble_name ((FILE), (NAME));                                     \
 726     if (_new_size == 0) _new_size = 1;                                  \
 727     fprintf ((FILE), ","HOST_WIDE_INT_PRINT_UNSIGNED",%u\n", _new_size, \
 728              floor_log2 ((ALIGN) / BITS_PER_UNIT));                     \
 729     if ((DECL) && ((TREE_STATIC (DECL)                                  \
 730          && (!DECL_COMMON (DECL) || !TREE_PUBLIC (DECL)))               \
 731         || DECL_INITIAL (DECL)))                                        \
 732       {                                                                 \
 733         (* targetm.encode_section_info) (DECL, DECL_RTL (DECL), false); \
 734         machopic_define_symbol (DECL_RTL (DECL));                       \
 735       }                                                                 \
 736   } while (0)
 737
 738 /* The maximum alignment which the object file format can support in
 739    bits.  For Mach-O, this is 2^15 bytes.  */
 740
 741 #undef  MAX_OFILE_ALIGNMENT
 742 #define MAX_OFILE_ALIGNMENT (0x8000 * 8)
 743
 744 /* Declare the section variables.  */
 745 #ifndef USED_FOR_TARGET
 746 enum darwin_section_enum {
 747 #define DEF_SECTION(NAME, FLAGS, DIRECTIVE, OBJC) NAME,
 748 #include "darwin-sections.def"
 749 #undef DEF_SECTION
 750   NUM_DARWIN_SECTIONS
 751 };
 752 extern GTY(()) section * darwin_sections[NUM_DARWIN_SECTIONS];
 753 #endif
 754
 755 #undef  TARGET_ASM_SELECT_SECTION
 756 #define TARGET_ASM_SELECT_SECTION machopic_select_section
 757 #define USE_SELECT_SECTION_FOR_FUNCTIONS
 758
 759 #undef  TARGET_ASM_SELECT_RTX_SECTION
 760 #define TARGET_ASM_SELECT_RTX_SECTION machopic_select_rtx_section
 761 #undef  TARGET_ASM_UNIQUE_SECTION
 762 #define TARGET_ASM_UNIQUE_SECTION darwin_unique_section
 763 #undef  TARGET_ASM_FUNCTION_RODATA_SECTION
 764 #define TARGET_ASM_FUNCTION_RODATA_SECTION default_no_function_rodata_section
 765 #undef  TARGET_ASM_RELOC_RW_MASK
 766 #define TARGET_ASM_RELOC_RW_MASK machopic_reloc_rw_mask
 767
 768
 769 #define ASM_DECLARE_UNRESOLVED_REFERENCE(FILE,NAME)                     \
 770     do {                                                                \
 771          if (FILE) {                                                    \
 772            if (MACHOPIC_INDIRECT)                                       \
 773              fprintf (FILE, "\t.lazy_reference ");                      \
 774            else                                                         \
 775              fprintf (FILE, "\t.reference ");                           \
 776            assemble_name (FILE, NAME);                                  \
 777            fprintf (FILE, "\n");                                        \
 778          }                                                              \
 779        } while (0)
 780
 781 #define ASM_DECLARE_CLASS_REFERENCE(FILE,NAME)                          \
 782     do {                                                                \
 783          if (FILE) {                                                    \
 784            fprintf (FILE, "\t");                                        \
 785            assemble_name (FILE, NAME);                                  \
 786            fprintf (FILE, "=0\n");                                      \
 787            (*targetm.asm_out.globalize_label) (FILE, NAME);             \
 788          }                                                              \
 789        } while (0)
 790
 791 /* Globalizing directive for a label.  */
 792 #define GLOBAL_ASM_OP "\t.globl "
 793 #define TARGET_ASM_GLOBALIZE_LABEL darwin_globalize_label
 794
 795 /* Emit an assembler directive to set visibility for a symbol.  Used
 796    to support visibility attribute and Darwin's private extern
 797    feature.  */
 798 #undef TARGET_ASM_ASSEMBLE_VISIBILITY
 799 #define TARGET_ASM_ASSEMBLE_VISIBILITY darwin_assemble_visibility
 800
 801 /* Extra attributes for Darwin.  */
 802 #define SUBTARGET_ATTRIBUTE_TABLE                                            \
 803   /* { name, min_len, max_len, decl_req, type_req, fn_type_req, handler } */ \
 804   { "apple_kext_compatibility", 0, 0, false, true, false,                    \
 805     darwin_handle_kext_attribute },                                          \
 806   { "weak_import", 0, 0, true, false, false,                                 \
 807     darwin_handle_weak_import_attribute }
 808
 809 #undef ASM_GENERATE_INTERNAL_LABEL
 810 #define ASM_GENERATE_INTERNAL_LABEL(LABEL,PREFIX,NUM)   \
 811   sprintf (LABEL, "*%s%ld", PREFIX, (long)(NUM))
 812
 813 #undef TARGET_ASM_MARK_DECL_PRESERVED
 814 #define TARGET_ASM_MARK_DECL_PRESERVED darwin_mark_decl_preserved
 815
 816 /* Set on a symbol with SYMBOL_FLAG_FUNCTION or
 817    MACHO_SYMBOL_FLAG_VARIABLE to indicate that the function or
 818    variable has been defined in this translation unit.
 819    When porting Mach-O to new architectures you need to make
 820    sure these aren't clobbered by the backend.  */
 821
 822 #define MACHO_SYMBOL_FLAG_VARIABLE (SYMBOL_FLAG_MACH_DEP)
 823 #define MACHO_SYMBOL_FLAG_DEFINED ((SYMBOL_FLAG_MACH_DEP) << 1)
 824
 825 /* Set on a symbol to indicate when fix-and-continue style code
 826    generation is being used and the symbol refers to a static symbol
 827    that should be rebound from new instances of a translation unit to
 828    the original instance of the data.  */
 829
 830 #define MACHO_SYMBOL_STATIC ((SYMBOL_FLAG_MACH_DEP) << 2)
 831
 832 /* Symbolic names for various things we might know about a symbol.  */
 833
 834 enum machopic_addr_class {
 835   MACHOPIC_UNDEFINED,
 836   MACHOPIC_DEFINED_DATA,
 837   MACHOPIC_UNDEFINED_DATA,
 838   MACHOPIC_DEFINED_FUNCTION,
 839   MACHOPIC_UNDEFINED_FUNCTION
 840 };
 841
 842 /* Macros defining the various PIC cases.  */
 843
 844 #define MACHO_DYNAMIC_NO_PIC_P  (TARGET_DYNAMIC_NO_PIC)
 845 #define MACHOPIC_INDIRECT       (flag_pic || MACHO_DYNAMIC_NO_PIC_P)
 846 #define MACHOPIC_JUST_INDIRECT  (MACHO_DYNAMIC_NO_PIC_P)
 847 #define MACHOPIC_PURE           (flag_pic && ! MACHO_DYNAMIC_NO_PIC_P)
 848
 849 #undef TARGET_ENCODE_SECTION_INFO
 850 #define TARGET_ENCODE_SECTION_INFO  darwin_encode_section_info
 851 #undef TARGET_STRIP_NAME_ENCODING
 852 #define TARGET_STRIP_NAME_ENCODING  default_strip_name_encoding
 853
 854 #define GEN_BINDER_NAME_FOR_STUB(BUF,STUB,STUB_LENGTH)          \
 855   do {                                                          \
 856     const char *const stub_ = (STUB);                           \
 857     char *buffer_ = (BUF);                                      \
 858     strcpy (buffer_, stub_);                                    \
 859     if (stub_[0] == '"')                                        \
 860       {                                                         \
 861         strcpy (buffer_ + (STUB_LENGTH) - 1, "_binder\"");      \
 862       }                                                         \
 863     else                                                        \
 864       {                                                         \
 865         strcpy (buffer_ + (STUB_LENGTH), "_binder");            \
 866       }                                                         \
 867   } while (0)
 868
 869 #define GEN_SYMBOL_NAME_FOR_SYMBOL(BUF,SYMBOL,SYMBOL_LENGTH)    \
 870   do {                                                          \
 871     const char *const symbol_ = (SYMBOL);                       \
 872     char *buffer_ = (BUF);                                      \
 873     if (name_needs_quotes (symbol_) && symbol_[0] != '"')       \
 874       {                                                         \
 875           sprintf (buffer_, "\"%s\"", symbol_);                 \
 876       }                                                         \
 877     else                                                        \
 878       {                                                         \
 879         strcpy (buffer_, symbol_);                              \
 880       }                                                         \
 881   } while (0)
 882
 883 /* Given a symbol name string, create the lazy pointer version
 884    of the symbol name.  */
 885
 886 #define GEN_LAZY_PTR_NAME_FOR_SYMBOL(BUF,SYMBOL,SYMBOL_LENGTH)  \
 887   do {                                                          \
 888     const char *symbol_ = (SYMBOL);                             \
 889     char *buffer_ = (BUF);                                      \
 890     if (symbol_[0] == '"')                                      \
 891       {                                                         \
 892         strcpy (buffer_, "\"L");                                \
 893         strcpy (buffer_ + 2, symbol_ + 1);                      \
 894         strcpy (buffer_ + (SYMBOL_LENGTH), "$lazy_ptr\"");      \
 895       }                                                         \
 896     else if (name_needs_quotes (symbol_))                       \
 897       {                                                         \
 898         strcpy (buffer_, "\"L");                                \
 899         strcpy (buffer_ + 2, symbol_);                          \
 900         strcpy (buffer_ + (SYMBOL_LENGTH) + 2, "$lazy_ptr\"");  \
 901       }                                                         \
 902     else                                                        \
 903       {                                                         \
 904         strcpy (buffer_, "L");                                  \
 905         strcpy (buffer_ + 1, symbol_);                          \
 906         strcpy (buffer_ + (SYMBOL_LENGTH) + 1, "$lazy_ptr");    \
 907       }                                                         \
 908   } while (0)
 909
 910 #define EH_FRAME_SECTION_NAME   "__TEXT"
 911 #define EH_FRAME_SECTION_ATTR ",coalesced,no_toc+strip_static_syms+live_support"
 912
 913 /* Java runtime class list.  */
 914 #define JCR_SECTION_NAME "__DATA,jcr,regular,no_dead_strip"
 915
 916 #undef ASM_PREFERRED_EH_DATA_FORMAT
 917 #define ASM_PREFERRED_EH_DATA_FORMAT(CODE,GLOBAL)  \
 918   (((CODE) == 2 && (GLOBAL) == 1) \
 919    ? (DW_EH_PE_pcrel | DW_EH_PE_indirect | DW_EH_PE_sdata4) : \
 920      ((CODE) == 1 || (GLOBAL) == 0) ? DW_EH_PE_pcrel : DW_EH_PE_absptr)
 921
 922 #define ASM_OUTPUT_DWARF_DELTA(FILE,SIZE,LABEL1,LABEL2)  \
 923   darwin_asm_output_dwarf_delta (FILE, SIZE, LABEL1, LABEL2)
 924
 925 #define ASM_OUTPUT_DWARF_OFFSET(FILE,SIZE,LABEL,BASE)  \
 926   darwin_asm_output_dwarf_offset (FILE, SIZE, LABEL, BASE)
 927
 928 #define ASM_MAYBE_OUTPUT_ENCODED_ADDR_RTX(ASM_OUT_FILE, ENCODING, SIZE, ADDR, DONE)     \
 929       if (ENCODING == ASM_PREFERRED_EH_DATA_FORMAT (2, 1)) {                            \
 930         darwin_non_lazy_pcrel (ASM_OUT_FILE, ADDR);                                     \
 931         goto DONE;                                                                      \
 932       }
 933
 934 /* Experimentally, putting jump tables in text is faster on SPEC.
 935    Also this is needed for correctness for coalesced functions.  */
 936
 937 #ifndef JUMP_TABLES_IN_TEXT_SECTION
 938 #define JUMP_TABLES_IN_TEXT_SECTION 1
 939 #endif
 940
 941 #define TARGET_TERMINATE_DW2_EH_FRAME_INFO false
 942
 943 #define TARGET_ASM_INIT_SECTIONS darwin_init_sections
 944 #undef TARGET_ASM_NAMED_SECTION
 945 #define TARGET_ASM_NAMED_SECTION darwin_asm_named_section
 946
 947 /* Handle pragma weak and pragma pack.  */
 948 #define HANDLE_SYSV_PRAGMA 1
 949
 950 #define HANDLE_PRAGMA_PACK_PUSH_POP 1
 951
 952 #define DARWIN_REGISTER_TARGET_PRAGMAS()                        \
 953   do {                                                          \
 954     if (!flag_preprocess_only)                                  \
 955       cpp_register_pragma (parse_in, NULL, "mark",              \
 956                            darwin_pragma_ignore, false);        \
 957     c_register_pragma (0, "options", darwin_pragma_options);    \
 958     c_register_pragma (0, "segment", darwin_pragma_ignore);     \
 959     c_register_pragma (0, "unused", darwin_pragma_unused);      \
 960     c_register_pragma (0, "ms_struct", darwin_pragma_ms_struct); \
 961   } while (0)
 962
 963 #undef ASM_APP_ON
 964 #define ASM_APP_ON ""
 965 #undef ASM_APP_OFF
 966 #define ASM_APP_OFF ""
 967
 968 void darwin_register_frameworks (const char *, const char *, int);
 969 void darwin_register_objc_includes (const char *, const char *, int);
 970 #define TARGET_EXTRA_PRE_INCLUDES darwin_register_objc_includes
 971 #define TARGET_EXTRA_INCLUDES darwin_register_frameworks
 972
 973 void add_framework_path (char *);
 974 #define TARGET_OPTF add_framework_path
 975
 976 #define TARGET_POSIX_IO
 977
 978 /* All new versions of Darwin have C99 functions.  */
 979
 980 #define TARGET_C99_FUNCTIONS 1
 981
 982 #define WINT_TYPE "int"
 983
 984 /* Every program on darwin links against libSystem which contains the pthread
 985    routines, so there's no need to explicitly call out when doing threaded
 986    work.  */
 987
 988 #undef GOMP_SELF_SPECS
 989 #define GOMP_SELF_SPECS ""
 990
 991 /* Darwin can't support anchors until we can cope with the adjustments
 992    to size that ASM_DECLARE_OBJECT_NAME and ASM_DECLARE_CONSTANT_NAME
 993    when outputting members of an anchor block and the linker can be
 994    taught to keep them together or we find some other suitable
 995    code-gen technique.  */
 996
 997 #if 0
 998 #define TARGET_ASM_OUTPUT_ANCHOR darwin_asm_output_anchor
 999 #else
1000 #define TARGET_ASM_OUTPUT_ANCHOR NULL
1001 #endif
1002
1003 /* Attempt to turn on execute permission for the stack.  This may be
1004     used by TARGET_TRAMPOLINE_INIT if the target needs it (that is,
1005     if the target machine can change execute permissions on a page).
1006
1007     There is no way to query the execute permission of the stack, so
1008     we always issue the mprotect() call.
1009
1010     Unfortunately it is not possible to make this namespace-clean.
1011
1012     Also note that no errors should be emitted by this code; it is
1013     considered dangerous for library calls to send messages to
1014     stdout/stderr.  */
1015
1016 #define ENABLE_EXECUTE_STACK                                            \
1017 extern void __enable_execute_stack (void *);                            \
1018 void                                                                    \
1019 __enable_execute_stack (void *addr)                                     \
1020 {                                                                       \
1021    extern int mprotect (void *, size_t, int);                           \
1022    extern int getpagesize (void);                                       \
1023    static int size;                                                     \
1024    static long mask;                                                    \
1025                                                                         \
1026    char *page, *end;                                                    \
1027                                                                         \
1028    if (size == 0)                                                       \
1029      {                                                                  \
1030        size = getpagesize();                                            \
1031        mask = ~((long) size - 1);                                       \
1032      }                                                                  \
1033                                                                         \
1034    page = (char *) (((long) addr) & mask);                              \
1035    end  = (char *) ((((long) (addr + (TARGET_64BIT ? 48 : 40))) & mask) + size); \
1036                                                                         \
1037    /* 7 == PROT_READ | PROT_WRITE | PROT_EXEC */                        \
1038    (void) mprotect (page, end - page, 7);                               \
1039 }
1040
1041 /* For Apple KEXTs, we make the constructors return this to match gcc
1042    2.95.  */
1043 #define TARGET_CXX_CDTOR_RETURNS_THIS (darwin_kextabi_p)
1044 extern int flag_mkernel;
1045 extern int flag_apple_kext;
1046 #define TARGET_KEXTABI flag_apple_kext
1047
1048 #define TARGET_HAS_TARGETCM 1
1049
1050 #ifndef CROSS_DIRECTORY_STRUCTURE
1051 extern void darwin_default_min_version (int * argc, char *** argv);
1052 #define GCC_DRIVER_HOST_INITIALIZATION \
1053   darwin_default_min_version (&argc, &argv)
1054 #endif /* CROSS_DIRECTORY_STRUCTURE */
1055
1056 /* The Apple assembler and linker do not support constructor priorities.  */
1057 #undef SUPPORTS_INIT_PRIORITY
1058 #define SUPPORTS_INIT_PRIORITY 0
1059
1060 #endif /* CONFIG_DARWIN_H */