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
 270 #define LINK_COMMAND_SPEC_A \
 271    "%{!fdump=*:%{!fsyntax-only:%{!c:%{!M:%{!MM:%{!E:%{!S:\
 272     %(linker) %l %X %{d} %{s} %{t} %{Z} %{u*} \
 273     %{A} %{e*} %{m} %{r} %{x} \
 274     %{o*}%{!o:-o a.out} \
 275     %{!A:%{!nostdlib:%{!nostartfiles:%S}}} \
 276     %{L*} %(link_libgcc) %o %{fprofile-arcs|fprofile-generate*|coverage:-lgcov} \
 277     %{flto} %{fwhopr} \
 278     %{fopenmp|ftree-parallelize-loops=*: \
 279       %{static|static-libgcc|static-libstdc++|static-libgfortran: libgomp.a%s; : -lgomp } } \
 280     %{!nostdlib:%{!nodefaultlibs: %(link_ssp) %G %L }} \
 281     %{!A:%{!nostdlib:%{!nostartfiles:%E}}} %{T*} %{F*} }}}}}}}\n"
 282
 283 #define DSYMUTIL "dsymutil"
 284
 285 #define DSYMUTIL_SPEC \
 286    "%{!fdump=*:%{!fsyntax-only:%{!c:%{!M:%{!MM:%{!E:%{!S:\
 287     %{.c|.cc|.C|.cpp|.cp|.c++|.cxx|.CPP|.m|.mm: \
 288     %{gdwarf-2:%{!gstabs*:%{!g0: " DSYMUTIL " %{o*:%*}%{!o:a.out}}}}}}}}}}}}"
 289
 290 #define LINK_COMMAND_SPEC LINK_COMMAND_SPEC_A DSYMUTIL_SPEC
 291
 292 #ifdef TARGET_SYSTEM_ROOT
 293 #define LINK_SYSROOT_SPEC \
 294   "%{isysroot*:-syslibroot %*;:-syslibroot " TARGET_SYSTEM_ROOT "}"
 295 #else
 296 #define LINK_SYSROOT_SPEC "%{isysroot*:-syslibroot %*}"
 297 #endif
 298
 299 /* Please keep the random linker options in alphabetical order (modulo
 300    'Z' and 'no' prefixes). Note that options taking arguments may appear
 301    multiple times on a command line with different arguments each time,
 302    so put a * after their names so all of them get passed.  */
 303 #define LINK_SPEC  \
 304   "%{static}%{!static:-dynamic} \
 305    %{fgnu-runtime: %{static|static-libgcc: \
 306                      %:replace-outfile(-lobjc libobjc-gnu.a%s); \
 307                     :%:replace-outfile(-lobjc -lobjc-gnu ) } }\
 308    %{static|static-libgcc|static-libgfortran:%:replace-outfile(-lgfortran libgfortran.a%s)}\
 309    %{static|static-libgcc|static-libstdc++|static-libgfortran:%:replace-outfile(-lgomp libgomp.a%s)}\
 310    %{static|static-libgcc|static-libstdc++:%:replace-outfile(-lstdc++ libstdc++.a%s)}\
 311    %{!Zdynamiclib: \
 312      %{Zforce_cpusubtype_ALL:-arch %(darwin_arch) -force_cpusubtype_ALL} \
 313      %{!Zforce_cpusubtype_ALL:-arch %(darwin_subarch)} \
 314      %{Zbundle:-bundle} \
 315      %{Zbundle_loader*:-bundle_loader %*} \
 316      %{client_name*} \
 317      %{compatibility_version*:%e-compatibility_version only allowed with -dynamiclib\
 318 } \
 319      %{current_version*:%e-current_version only allowed with -dynamiclib} \
 320      %{Zforce_flat_namespace:-force_flat_namespace} \
 321      %{Zinstall_name*:%e-install_name only allowed with -dynamiclib} \
 322      %{keep_private_externs} \
 323      %{private_bundle} \
 324     } \
 325    %{Zdynamiclib: -dylib \
 326      %{Zbundle:%e-bundle not allowed with -dynamiclib} \
 327      %{Zbundle_loader*:%e-bundle_loader not allowed with -dynamiclib} \
 328      %{client_name*:%e-client_name not allowed with -dynamiclib} \
 329      %{compatibility_version*:-dylib_compatibility_version %*} \
 330      %{current_version*:-dylib_current_version %*} \
 331      %{Zforce_cpusubtype_ALL:-arch %(darwin_arch)} \
 332      %{!Zforce_cpusubtype_ALL: -arch %(darwin_subarch)} \
 333      %{Zforce_flat_namespace:%e-force_flat_namespace not allowed with -dynamiclib} \
 334      %{Zinstall_name*:-dylib_install_name %*} \
 335      %{keep_private_externs:%e-keep_private_externs not allowed with -dynamiclib} \
 336      %{private_bundle:%e-private_bundle not allowed with -dynamiclib} \
 337     } \
 338    %{Zall_load:-all_load} \
 339    %{Zallowable_client*:-allowable_client %*} \
 340    %{Zbind_at_load:-bind_at_load} \
 341    %{Zarch_errors_fatal:-arch_errors_fatal} \
 342    %{Zdead_strip:-dead_strip} \
 343    %{Zno_dead_strip_inits_and_terms:-no_dead_strip_inits_and_terms} \
 344    %{Zdylib_file*:-dylib_file %*} \
 345    %{Zdynamic:-dynamic}\
 346    %{Zexported_symbols_list*:-exported_symbols_list %*} \
 347    %{Zflat_namespace:-flat_namespace} \
 348    %{headerpad_max_install_names*} \
 349    %{Zimage_base*:-image_base %*} \
 350    %{Zinit*:-init %*} \
 351    %{!mmacosx-version-min=*:-macosx_version_min %(darwin_minversion)} \
 352    %{mmacosx-version-min=*:-macosx_version_min %*} \
 353    %{nomultidefs} \
 354    %{Zmulti_module:-multi_module} %{Zsingle_module:-single_module} \
 355    %{Zmultiply_defined*:-multiply_defined %*} \
 356    %{!Zmultiply_defined*:%{shared-libgcc: \
 357      %:version-compare(< 10.5 mmacosx-version-min= -multiply_defined) \
 358      %:version-compare(< 10.5 mmacosx-version-min= suppress)}} \
 359    %{Zmultiplydefinedunused*:-multiply_defined_unused %*} \
 360    %{fpie:-pie} \
 361    %{prebind} %{noprebind} %{nofixprebinding} %{prebind_all_twolevel_modules} \
 362    %{read_only_relocs} \
 363    %{sectcreate*} %{sectorder*} %{seg1addr*} %{segprot*} \
 364    %{Zsegaddr*:-segaddr %*} \
 365    %{Zsegs_read_only_addr*:-segs_read_only_addr %*} \
 366    %{Zsegs_read_write_addr*:-segs_read_write_addr %*} \
 367    %{Zseg_addr_table*: -seg_addr_table %*} \
 368    %{Zfn_seg_addr_table_filename*:-seg_addr_table_filename %*} \
 369    %{sub_library*} %{sub_umbrella*} \
 370    " LINK_SYSROOT_SPEC " \
 371    %{twolevel_namespace} %{twolevel_namespace_hints} \
 372    %{Zumbrella*: -umbrella %*} \
 373    %{undefined*} \
 374    %{Zunexported_symbols_list*:-unexported_symbols_list %*} \
 375    %{Zweak_reference_mismatches*:-weak_reference_mismatches %*} \
 376    %{!Zweak_reference_mismatches*:-weak_reference_mismatches non-weak} \
 377    %{X} \
 378    %{y*} \
 379    %{w} \
 380    %{pagezero_size*} %{segs_read_*} %{seglinkedit} %{noseglinkedit}  \
 381    %{sectalign*} %{sectobjectsymbols*} %{segcreate*} %{whyload} \
 382    %{whatsloaded} %{dylinker_install_name*} \
 383    %{dylinker} %{Mach} "
 384
 385
 386 /* Machine dependent libraries.  */
 387
 388 #define LIB_SPEC "%{!static:-lSystem}"
 389
 390 /* Support -mmacosx-version-min by supplying different (stub) libgcc_s.dylib
 391    libraries to link against, and by not linking against libgcc_s on
 392    earlier-than-10.3.9.
 393
 394    Note that by default, -lgcc_eh is not linked against!  This is
 395    because in a future version of Darwin the EH frame information may
 396    be in a new format, or the fallback routine might be changed; if
 397    you want to explicitly link against the static version of those
 398    routines, because you know you don't need to unwind through system
 399    libraries, you need to explicitly say -static-libgcc.
 400
 401    If it is linked against, it has to be before -lgcc, because it may
 402    need symbols from -lgcc.  */
 403 #undef REAL_LIBGCC_SPEC
 404 #define REAL_LIBGCC_SPEC                                                   \
 405    "%{static-libgcc|static: -lgcc_eh -lgcc;                                \
 406       shared-libgcc|fexceptions|fgnu-runtime:                              \
 407        %:version-compare(!> 10.5 mmacosx-version-min= -lgcc_s.10.4)        \
 408        %:version-compare(>= 10.5 mmacosx-version-min= -lgcc_s.10.5)        \
 409        %:version-compare(!> 10.5 mmacosx-version-min= -lgcc_ext.10.4)      \
 410        %:version-compare(>= 10.5 mmacosx-version-min= -lgcc_ext.10.5)      \
 411        -lgcc;                                                              \
 412       :%:version-compare(>< 10.3.9 10.5 mmacosx-version-min= -lgcc_s.10.4) \
 413        %:version-compare(>= 10.5 mmacosx-version-min= -lgcc_s.10.5)        \
 414        %:version-compare(!> 10.5 mmacosx-version-min= -lgcc_ext.10.4)      \
 415        %:version-compare(>= 10.5 mmacosx-version-min= -lgcc_ext.10.5)      \
 416        -lgcc}"
 417
 418 /* We specify crt0.o as -lcrt0.o so that ld will search the library path.
 419
 420    crt3.o provides __cxa_atexit on systems that don't have it.  Since
 421    it's only used with C++, which requires passing -shared-libgcc, key
 422    off that to avoid unnecessarily adding a destructor to every
 423    powerpc program built.  */
 424
 425 #undef  STARTFILE_SPEC
 426 #define STARTFILE_SPEC                                                      \
 427   "%{Zdynamiclib: %(darwin_dylib1) }                                        \
 428    %{!Zdynamiclib:%{Zbundle:%{!static:-lbundle1.o}}                         \
 429      %{!Zbundle:%{pg:%{static:-lgcrt0.o}                                    \
 430                      %{!static:%{object:-lgcrt0.o}                          \
 431                                %{!object:%{preload:-lgcrt0.o}               \
 432                                  %{!preload:-lgcrt1.o %(darwin_crt2)}}}}    \
 433                 %{!pg:%{static:-lcrt0.o}                                    \
 434                       %{!static:%{object:-lcrt0.o}                          \
 435                                 %{!object:%{preload:-lcrt0.o}               \
 436                                   %{!preload: %(darwin_crt1)                \
 437                                               %(darwin_crt2)}}}}}}          \
 438   %{shared-libgcc:%:version-compare(< 10.5 mmacosx-version-min= crt3.o%s)}"
 439
 440 /* The native Darwin linker doesn't necessarily place files in the order
 441    that they're specified on the link line.  Thus, it is pointless
 442    to put anything in ENDFILE_SPEC.  */
 443 /* #define ENDFILE_SPEC "" */
 444
 445 #define DARWIN_EXTRA_SPECS                                              \
 446   { "darwin_crt1", DARWIN_CRT1_SPEC },                                  \
 447   { "darwin_dylib1", DARWIN_DYLIB1_SPEC },                              \
 448   { "darwin_minversion", DARWIN_MINVERSION_SPEC },
 449
 450 #define DARWIN_DYLIB1_SPEC                                              \
 451   "%:version-compare(!> 10.5 mmacosx-version-min= -ldylib1.o)           \
 452    %:version-compare(>= 10.5 mmacosx-version-min= -ldylib1.10.5.o)"
 453
 454 #define DARWIN_CRT1_SPEC                                                \
 455   "%:version-compare(!> 10.5 mmacosx-version-min= -lcrt1.o)             \
 456    %:version-compare(>= 10.5 mmacosx-version-min= -lcrt1.10.5.o)"
 457
 458 /* Default Darwin ASM_SPEC, very simple.  */
 459 #define ASM_SPEC "-arch %(darwin_arch) \
 460   %{Zforce_cpusubtype_ALL:-force_cpusubtype_ALL}"
 461
 462 /* We still allow output of STABS.  */
 463
 464 #define DBX_DEBUGGING_INFO 1
 465
 466 #define DWARF2_DEBUGGING_INFO 1
 467 #define PREFERRED_DEBUGGING_TYPE DBX_DEBUG
 468
 469 #define DEBUG_FRAME_SECTION     "__DWARF,__debug_frame,regular,debug"
 470 #define DEBUG_INFO_SECTION      "__DWARF,__debug_info,regular,debug"
 471 #define DEBUG_ABBREV_SECTION    "__DWARF,__debug_abbrev,regular,debug"
 472 #define DEBUG_ARANGES_SECTION   "__DWARF,__debug_aranges,regular,debug"
 473 #define DEBUG_MACINFO_SECTION   "__DWARF,__debug_macinfo,regular,debug"
 474 #define DEBUG_LINE_SECTION      "__DWARF,__debug_line,regular,debug"
 475 #define DEBUG_LOC_SECTION       "__DWARF,__debug_loc,regular,debug"
 476 #define DEBUG_PUBNAMES_SECTION  "__DWARF,__debug_pubnames,regular,debug"
 477 #define DEBUG_PUBTYPES_SECTION  "__DWARF,__debug_pubtypes,regular,debug"
 478 #define DEBUG_STR_SECTION       "__DWARF,__debug_str,regular,debug"
 479 #define DEBUG_RANGES_SECTION    "__DWARF,__debug_ranges,regular,debug"
 480
 481 #define TARGET_WANT_DEBUG_PUB_SECTIONS true
 482
 483 /* When generating stabs debugging, use N_BINCL entries.  */
 484
 485 #define DBX_USE_BINCL
 486
 487 /* There is no limit to the length of stabs strings.  */
 488
 489 #define DBX_CONTIN_LENGTH 0
 490
 491 /* gdb needs a null N_SO at the end of each file for scattered loading.  */
 492
 493 #define DBX_OUTPUT_NULL_N_SO_AT_MAIN_SOURCE_FILE_END
 494
 495 /* GCC's definition of 'one_only' is the same as its definition of 'weak'.  */
 496 #define MAKE_DECL_ONE_ONLY(DECL) (DECL_WEAK (DECL) = 1)
 497
 498 /* Mach-O supports 'weak imports', and 'weak definitions' in coalesced
 499    sections.  machopic_select_section ensures that weak variables go in
 500    coalesced sections.  Weak aliases (or any other kind of aliases) are
 501    not supported.  Weak symbols that aren't visible outside the .s file
 502    are not supported.  */
 503 #define ASM_WEAKEN_DECL(FILE, DECL, NAME, ALIAS)                        \
 504   do {                                                                  \
 505     if (ALIAS)                                                          \
 506       {                                                                 \
 507         warning (0, "alias definitions not supported in Mach-O; ignored");      \
 508         break;                                                          \
 509       }                                                                 \
 510                                                                         \
 511     if (! DECL_EXTERNAL (DECL) && TREE_PUBLIC (DECL))                   \
 512       targetm.asm_out.globalize_label (FILE, NAME);                     \
 513     if (DECL_EXTERNAL (DECL))                                           \
 514       fputs ("\t.weak_reference ", FILE);                               \
 515     else if (lookup_attribute ("weak_import", DECL_ATTRIBUTES (DECL)))  \
 516       break;                                                            \
 517     else if (TREE_PUBLIC (DECL))                                        \
 518       fputs ("\t.weak_definition ", FILE);                              \
 519     else                                                                \
 520       break;                                                            \
 521     assemble_name (FILE, NAME);                                         \
 522     fputc ('\n', FILE);                                                 \
 523   } while (0)
 524
 525 /* Darwin has the pthread routines in libSystem, which every program
 526    links to, so there's no need for weak-ness for that.  */
 527 #define GTHREAD_USE_WEAK 0
 528
 529 /* The Darwin linker imposes two limitations on common symbols: they
 530    can't have hidden visibility, and they can't appear in dylibs.  As
 531    a consequence, we should never use common symbols to represent
 532    vague linkage. */
 533 #undef USE_COMMON_FOR_ONE_ONLY
 534 #define USE_COMMON_FOR_ONE_ONLY 0
 535
 536 /* The Darwin linker doesn't want coalesced symbols to appear in
 537    a static archive's table of contents. */
 538 #undef TARGET_WEAK_NOT_IN_ARCHIVE_TOC
 539 #define TARGET_WEAK_NOT_IN_ARCHIVE_TOC 1
 540
 541 /* On Darwin, we don't (at the time of writing) have linkonce sections
 542    with names, so it's safe to make the class data not comdat.  */
 543 #define TARGET_CXX_CLASS_DATA_ALWAYS_COMDAT hook_bool_void_false
 544
 545 /* For efficiency, on Darwin the RTTI information that is always
 546    emitted in the standard C++ library should not be COMDAT.  */
 547 #define TARGET_CXX_LIBRARY_RTTI_COMDAT hook_bool_void_false
 548
 549 /* We make exception information linkonce. */
 550 #undef TARGET_USES_WEAK_UNWIND_INFO
 551 #define TARGET_USES_WEAK_UNWIND_INFO 1
 552
 553 /* We need to use a nonlocal label for the start of an EH frame: the
 554    Darwin linker requires that a coalesced section start with a label.
 555    Unfortunately, it also requires that 'debug' sections don't contain
 556    labels.  */
 557 #undef FRAME_BEGIN_LABEL
 558 #define FRAME_BEGIN_LABEL (for_eh ? "EH_frame" : "Lframe")
 559
 560 /* Emit a label for the FDE corresponding to DECL.  EMPTY means
 561    emit a label for an empty FDE. */
 562 #define TARGET_ASM_EMIT_UNWIND_LABEL darwin_emit_unwind_label
 563
 564 /* Emit a label to separate the exception table.  */
 565 #define TARGET_ASM_EMIT_EXCEPT_TABLE_LABEL darwin_emit_except_table_label
 566
 567 /* Our profiling scheme doesn't LP labels and counter words.  */
 568
 569 #define NO_PROFILE_COUNTERS     1
 570
 571 #undef  INIT_SECTION_ASM_OP
 572 #define INIT_SECTION_ASM_OP
 573
 574 #undef  INVOKE__main
 575
 576 #define TARGET_ASM_CONSTRUCTOR  machopic_asm_out_constructor
 577 #define TARGET_ASM_DESTRUCTOR   machopic_asm_out_destructor
 578
 579 /* Always prefix with an underscore.  */
 580
 581 #define USER_LABEL_PREFIX "_"
 582
 583 /* A dummy symbol that will be replaced with the function base name.  */
 584 #define MACHOPIC_FUNCTION_BASE_NAME "<pic base>"
 585
 586 /* Don't output a .file directive.  That is only used by the assembler for
 587    error reporting.  */
 588 #undef  TARGET_ASM_FILE_START_FILE_DIRECTIVE
 589 #define TARGET_ASM_FILE_START_FILE_DIRECTIVE false
 590
 591 #undef  TARGET_ASM_FILE_END
 592 #define TARGET_ASM_FILE_END darwin_file_end
 593
 594 /* Because Mach-O relocations have a counter from 1 to 255 for the
 595    section number they apply to, it is necessary to output all
 596    normal sections before the LTO sections, to make sure that the
 597    sections that may have relocations always have a section number
 598    smaller than 255.  */
 599 #undef  TARGET_ASM_LTO_START
 600 #define TARGET_ASM_LTO_START darwin_asm_lto_start
 601 #undef  TARGET_ASM_LTO_END
 602 #define TARGET_ASM_LTO_END darwin_asm_lto_end
 603
 604 #define ASM_OUTPUT_SKIP(FILE,SIZE)  \
 605   fprintf (FILE, "\t.space "HOST_WIDE_INT_PRINT_UNSIGNED"\n", SIZE)
 606
 607 /* Give ObjC methods pretty symbol names.  */
 608
 609 #undef  OBJC_GEN_METHOD_LABEL
 610 #define OBJC_GEN_METHOD_LABEL(BUF,IS_INST,CLASS_NAME,CAT_NAME,SEL_NAME,NUM) \
 611   do { if (CAT_NAME)                                                    \
 612          sprintf (BUF, "%c[%s(%s) %s]", (IS_INST) ? '-' : '+',          \
 613                   (CLASS_NAME), (CAT_NAME), (SEL_NAME));                \
 614        else                                                             \
 615          sprintf (BUF, "%c[%s %s]", (IS_INST) ? '-' : '+',              \
 616                   (CLASS_NAME), (SEL_NAME));                            \
 617      } while (0)
 618
 619 /* The RTTI data (e.g., __ti4name) is common and public (and static),
 620    but it does need to be referenced via indirect PIC data pointers.
 621    The machopic_define_symbol calls are telling the machopic subsystem
 622    that the name *is* defined in this module, so it doesn't need to
 623    make them indirect.  */
 624
 625 #undef ASM_DECLARE_OBJECT_NAME
 626 #define ASM_DECLARE_OBJECT_NAME(FILE, NAME, DECL)                       \
 627   do {                                                                  \
 628     const char *xname = NAME;                                           \
 629     if (GET_CODE (XEXP (DECL_RTL (DECL), 0)) != SYMBOL_REF)             \
 630       xname = IDENTIFIER_POINTER (DECL_NAME (DECL));                    \
 631     if (! DECL_WEAK (DECL)                                              \
 632         && ((TREE_STATIC (DECL)                                         \
 633              && (!DECL_COMMON (DECL) || !TREE_PUBLIC (DECL)))           \
 634             || DECL_INITIAL (DECL)))                                    \
 635         machopic_define_symbol (DECL_RTL (DECL));                       \
 636     if ((TREE_STATIC (DECL)                                             \
 637          && (!DECL_COMMON (DECL) || !TREE_PUBLIC (DECL)))               \
 638         || DECL_INITIAL (DECL))                                         \
 639       (* targetm.encode_section_info) (DECL, DECL_RTL (DECL), false);   \
 640     ASM_OUTPUT_LABEL (FILE, xname);                                     \
 641     /* Darwin doesn't support zero-size objects, so give them a         \
 642        byte.  */                                                        \
 643     if (tree_low_cst (DECL_SIZE_UNIT (DECL), 1) == 0)                   \
 644       assemble_zeros (1);                                               \
 645   } while (0)
 646
 647 #define ASM_DECLARE_FUNCTION_NAME(FILE, NAME, DECL)                     \
 648   do {                                                                  \
 649     const char *xname = NAME;                                           \
 650     if (GET_CODE (XEXP (DECL_RTL (DECL), 0)) != SYMBOL_REF)             \
 651       xname = IDENTIFIER_POINTER (DECL_NAME (DECL));                    \
 652     if (! DECL_WEAK (DECL)                                              \
 653         && ((TREE_STATIC (DECL)                                         \
 654              && (!DECL_COMMON (DECL) || !TREE_PUBLIC (DECL)))           \
 655             || DECL_INITIAL (DECL)))                                    \
 656         machopic_define_symbol (DECL_RTL (DECL));                       \
 657     if ((TREE_STATIC (DECL)                                             \
 658          && (!DECL_COMMON (DECL) || !TREE_PUBLIC (DECL)))               \
 659         || DECL_INITIAL (DECL))                                         \
 660       (* targetm.encode_section_info) (DECL, DECL_RTL (DECL), false);   \
 661     ASM_OUTPUT_FUNCTION_LABEL (FILE, xname, DECL);                      \
 662   } while (0)
 663
 664 #undef TARGET_ASM_DECLARE_CONSTANT_NAME
 665 #define TARGET_ASM_DECLARE_CONSTANT_NAME darwin_asm_declare_constant_name
 666
 667 /* Wrap new method names in quotes so the assembler doesn't gag.
 668    Make Objective-C internal symbols local and in doing this, we need
 669    to accommodate the name mangling done by c++ on file scope locals.  */
 670
 671
 672 int darwin_label_is_anonymous_local_objc_name (const char *name);
 673
 674 #undef  ASM_OUTPUT_LABELREF
 675 #define ASM_OUTPUT_LABELREF(FILE,NAME)                                       \
 676   do {                                                                       \
 677        const char *xname = (NAME);                                           \
 678        if (! strcmp (xname, MACHOPIC_FUNCTION_BASE_NAME))                    \
 679          machopic_output_function_base_name(FILE);                           \
 680        else if (xname[0] == '&' || xname[0] == '*')                          \
 681          {                                                                   \
 682            int len = strlen (xname);                                         \
 683            if (len > 6 && !strcmp ("$stub", xname + len - 5))                \
 684              machopic_validate_stub_or_non_lazy_ptr (xname);                 \
 685            else if (len > 7 && !strcmp ("$stub\"", xname + len - 6))         \
 686              machopic_validate_stub_or_non_lazy_ptr (xname);                 \
 687            else if (len > 14 && !strcmp ("$non_lazy_ptr", xname + len - 13)) \
 688              machopic_validate_stub_or_non_lazy_ptr (xname);                 \
 689            else if (len > 15 && !strcmp ("$non_lazy_ptr\"", xname + len - 14)) \
 690              machopic_validate_stub_or_non_lazy_ptr (xname);                 \
 691            if (xname[1] != '"' && name_needs_quotes (&xname[1]))             \
 692              fprintf (FILE, "\"%s\"", &xname[1]);                            \
 693            else                                                              \
 694              fputs (&xname[1], FILE);                                        \
 695          }                                                                   \
 696        else if (xname[0] == '+' || xname[0] == '-')                          \
 697          fprintf (FILE, "\"%s\"", xname);                                    \
 698        else if (darwin_label_is_anonymous_local_objc_name (xname))                                   \
 699          fprintf (FILE, "L%s", xname);                                       \
 700        else if (!strncmp (xname, ".objc_class_name_", 17))                   \
 701          fprintf (FILE, "%s", xname);                                        \
 702        else if (xname[0] != '"' && name_needs_quotes (xname))                \
 703          fprintf (FILE, "\"%s\"", xname);                                    \
 704        else                                                                  \
 705          asm_fprintf (FILE, "%U%s", xname);                                  \
 706   } while (0)
 707
 708 /* Output before executable code.  */
 709 #undef TEXT_SECTION_ASM_OP
 710 #define TEXT_SECTION_ASM_OP "\t.text"
 711
 712 /* Output before writable data.  */
 713
 714 #undef DATA_SECTION_ASM_OP
 715 #define DATA_SECTION_ASM_OP "\t.data"
 716
 717 #undef  ALIGN_ASM_OP
 718 #define ALIGN_ASM_OP            ".align"
 719
 720 #undef  ASM_OUTPUT_ALIGN
 721 #define ASM_OUTPUT_ALIGN(FILE,LOG)      \
 722   if ((LOG) != 0)                       \
 723     fprintf (FILE, "\t%s %d\n", ALIGN_ASM_OP, (LOG))
 724
 725 /* Ensure correct alignment of bss data.  */
 726
 727 #undef  ASM_OUTPUT_ALIGNED_DECL_LOCAL
 728 #define ASM_OUTPUT_ALIGNED_DECL_LOCAL(FILE, DECL, NAME, SIZE, ALIGN)    \
 729   do {                                                                  \
 730     unsigned HOST_WIDE_INT _new_size = SIZE;                            \
 731     fputs ("\t.lcomm ", (FILE));                                                \
 732     assemble_name ((FILE), (NAME));                                     \
 733     if (_new_size == 0) _new_size = 1;                                  \
 734     fprintf ((FILE), ","HOST_WIDE_INT_PRINT_UNSIGNED",%u\n", _new_size, \
 735              floor_log2 ((ALIGN) / BITS_PER_UNIT));                     \
 736     if ((DECL) && ((TREE_STATIC (DECL)                                  \
 737          && (!DECL_COMMON (DECL) || !TREE_PUBLIC (DECL)))               \
 738         || DECL_INITIAL (DECL)))                                        \
 739       {                                                                 \
 740         (* targetm.encode_section_info) (DECL, DECL_RTL (DECL), false); \
 741         machopic_define_symbol (DECL_RTL (DECL));                       \
 742       }                                                                 \
 743   } while (0)
 744
 745 /* The maximum alignment which the object file format can support in
 746    bits.  For Mach-O, this is 2^15 bytes.  */
 747
 748 #undef  MAX_OFILE_ALIGNMENT
 749 #define MAX_OFILE_ALIGNMENT (0x8000 * 8)
 750
 751 /* Declare the section variables.  */
 752 #ifndef USED_FOR_TARGET
 753 enum darwin_section_enum {
 754 #define DEF_SECTION(NAME, FLAGS, DIRECTIVE, OBJC) NAME,
 755 #include "darwin-sections.def"
 756 #undef DEF_SECTION
 757   NUM_DARWIN_SECTIONS
 758 };
 759 extern GTY(()) section * darwin_sections[NUM_DARWIN_SECTIONS];
 760 #endif
 761
 762 #undef  TARGET_ASM_SELECT_SECTION
 763 #define TARGET_ASM_SELECT_SECTION machopic_select_section
 764 #define USE_SELECT_SECTION_FOR_FUNCTIONS
 765
 766 #undef  TARGET_ASM_SELECT_RTX_SECTION
 767 #define TARGET_ASM_SELECT_RTX_SECTION machopic_select_rtx_section
 768 #undef  TARGET_ASM_UNIQUE_SECTION
 769 #define TARGET_ASM_UNIQUE_SECTION darwin_unique_section
 770 #undef  TARGET_ASM_FUNCTION_RODATA_SECTION
 771 #define TARGET_ASM_FUNCTION_RODATA_SECTION default_no_function_rodata_section
 772 #undef  TARGET_ASM_RELOC_RW_MASK
 773 #define TARGET_ASM_RELOC_RW_MASK machopic_reloc_rw_mask
 774
 775
 776 #define ASM_DECLARE_UNRESOLVED_REFERENCE(FILE,NAME)                     \
 777     do {                                                                \
 778          if (FILE) {                                                    \
 779            if (MACHOPIC_INDIRECT)                                       \
 780              fprintf (FILE, "\t.lazy_reference ");                      \
 781            else                                                         \
 782              fprintf (FILE, "\t.reference ");                           \
 783            assemble_name (FILE, NAME);                                  \
 784            fprintf (FILE, "\n");                                        \
 785          }                                                              \
 786        } while (0)
 787
 788 #define ASM_DECLARE_CLASS_REFERENCE(FILE,NAME)                          \
 789     do {                                                                \
 790          if (FILE) {                                                    \
 791            fprintf (FILE, "\t");                                        \
 792            assemble_name (FILE, NAME);                                  \
 793            fprintf (FILE, "=0\n");                                      \
 794            (*targetm.asm_out.globalize_label) (FILE, NAME);             \
 795          }                                                              \
 796        } while (0)
 797
 798 /* Globalizing directive for a label.  */
 799 #define GLOBAL_ASM_OP "\t.globl "
 800 #define TARGET_ASM_GLOBALIZE_LABEL darwin_globalize_label
 801
 802 /* Emit an assembler directive to set visibility for a symbol.  Used
 803    to support visibility attribute and Darwin's private extern
 804    feature.  */
 805 #undef TARGET_ASM_ASSEMBLE_VISIBILITY
 806 #define TARGET_ASM_ASSEMBLE_VISIBILITY darwin_assemble_visibility
 807
 808 /* Extra attributes for Darwin.  */
 809 #define SUBTARGET_ATTRIBUTE_TABLE                                            \
 810   /* { name, min_len, max_len, decl_req, type_req, fn_type_req, handler } */ \
 811   { "apple_kext_compatibility", 0, 0, false, true, false,                    \
 812     darwin_handle_kext_attribute },                                          \
 813   { "weak_import", 0, 0, true, false, false,                                 \
 814     darwin_handle_weak_import_attribute }
 815
 816 #undef ASM_GENERATE_INTERNAL_LABEL
 817 #define ASM_GENERATE_INTERNAL_LABEL(LABEL,PREFIX,NUM)   \
 818   sprintf (LABEL, "*%s%ld", PREFIX, (long)(NUM))
 819
 820 #undef TARGET_ASM_MARK_DECL_PRESERVED
 821 #define TARGET_ASM_MARK_DECL_PRESERVED darwin_mark_decl_preserved
 822
 823 /* Set on a symbol with SYMBOL_FLAG_FUNCTION or
 824    MACHO_SYMBOL_FLAG_VARIABLE to indicate that the function or
 825    variable has been defined in this translation unit.
 826    When porting Mach-O to new architectures you need to make
 827    sure these aren't clobbered by the backend.  */
 828
 829 #define MACHO_SYMBOL_FLAG_VARIABLE (SYMBOL_FLAG_MACH_DEP)
 830 #define MACHO_SYMBOL_FLAG_DEFINED ((SYMBOL_FLAG_MACH_DEP) << 1)
 831
 832 /* Set on a symbol to indicate when fix-and-continue style code
 833    generation is being used and the symbol refers to a static symbol
 834    that should be rebound from new instances of a translation unit to
 835    the original instance of the data.  */
 836
 837 #define MACHO_SYMBOL_STATIC ((SYMBOL_FLAG_MACH_DEP) << 2)
 838
 839 /* Symbolic names for various things we might know about a symbol.  */
 840
 841 enum machopic_addr_class {
 842   MACHOPIC_UNDEFINED,
 843   MACHOPIC_DEFINED_DATA,
 844   MACHOPIC_UNDEFINED_DATA,
 845   MACHOPIC_DEFINED_FUNCTION,
 846   MACHOPIC_UNDEFINED_FUNCTION
 847 };
 848
 849 /* Macros defining the various PIC cases.  */
 850
 851 #define MACHO_DYNAMIC_NO_PIC_P  (TARGET_DYNAMIC_NO_PIC)
 852 #define MACHOPIC_INDIRECT       (flag_pic || MACHO_DYNAMIC_NO_PIC_P)
 853 #define MACHOPIC_JUST_INDIRECT  (MACHO_DYNAMIC_NO_PIC_P)
 854 #define MACHOPIC_PURE           (flag_pic && ! MACHO_DYNAMIC_NO_PIC_P)
 855
 856 #undef TARGET_ENCODE_SECTION_INFO
 857 #define TARGET_ENCODE_SECTION_INFO  darwin_encode_section_info
 858 #undef TARGET_STRIP_NAME_ENCODING
 859 #define TARGET_STRIP_NAME_ENCODING  default_strip_name_encoding
 860
 861 #define GEN_BINDER_NAME_FOR_STUB(BUF,STUB,STUB_LENGTH)          \
 862   do {                                                          \
 863     const char *const stub_ = (STUB);                           \
 864     char *buffer_ = (BUF);                                      \
 865     strcpy (buffer_, stub_);                                    \
 866     if (stub_[0] == '"')                                        \
 867       {                                                         \
 868         strcpy (buffer_ + (STUB_LENGTH) - 1, "_binder\"");      \
 869       }                                                         \
 870     else                                                        \
 871       {                                                         \
 872         strcpy (buffer_ + (STUB_LENGTH), "_binder");            \
 873       }                                                         \
 874   } while (0)
 875
 876 #define GEN_SYMBOL_NAME_FOR_SYMBOL(BUF,SYMBOL,SYMBOL_LENGTH)    \
 877   do {                                                          \
 878     const char *const symbol_ = (SYMBOL);                       \
 879     char *buffer_ = (BUF);                                      \
 880     if (name_needs_quotes (symbol_) && symbol_[0] != '"')       \
 881       {                                                         \
 882           sprintf (buffer_, "\"%s\"", symbol_);                 \
 883       }                                                         \
 884     else                                                        \
 885       {                                                         \
 886         strcpy (buffer_, symbol_);                              \
 887       }                                                         \
 888   } while (0)
 889
 890 /* Given a symbol name string, create the lazy pointer version
 891    of the symbol name.  */
 892
 893 #define GEN_LAZY_PTR_NAME_FOR_SYMBOL(BUF,SYMBOL,SYMBOL_LENGTH)  \
 894   do {                                                          \
 895     const char *symbol_ = (SYMBOL);                             \
 896     char *buffer_ = (BUF);                                      \
 897     if (symbol_[0] == '"')                                      \
 898       {                                                         \
 899         strcpy (buffer_, "\"L");                                \
 900         strcpy (buffer_ + 2, symbol_ + 1);                      \
 901         strcpy (buffer_ + (SYMBOL_LENGTH), "$lazy_ptr\"");      \
 902       }                                                         \
 903     else if (name_needs_quotes (symbol_))                       \
 904       {                                                         \
 905         strcpy (buffer_, "\"L");                                \
 906         strcpy (buffer_ + 2, symbol_);                          \
 907         strcpy (buffer_ + (SYMBOL_LENGTH) + 2, "$lazy_ptr\"");  \
 908       }                                                         \
 909     else                                                        \
 910       {                                                         \
 911         strcpy (buffer_, "L");                                  \
 912         strcpy (buffer_ + 1, symbol_);                          \
 913         strcpy (buffer_ + (SYMBOL_LENGTH) + 1, "$lazy_ptr");    \
 914       }                                                         \
 915   } while (0)
 916
 917 #define EH_FRAME_SECTION_NAME   "__TEXT"
 918 #define EH_FRAME_SECTION_ATTR ",coalesced,no_toc+strip_static_syms+live_support"
 919
 920 /* Java runtime class list.  */
 921 #define JCR_SECTION_NAME "__DATA,jcr,regular,no_dead_strip"
 922
 923 #undef ASM_PREFERRED_EH_DATA_FORMAT
 924 #define ASM_PREFERRED_EH_DATA_FORMAT(CODE,GLOBAL)  \
 925   (((CODE) == 2 && (GLOBAL) == 1) \
 926    ? (DW_EH_PE_pcrel | DW_EH_PE_indirect | DW_EH_PE_sdata4) : \
 927      ((CODE) == 1 || (GLOBAL) == 0) ? DW_EH_PE_pcrel : DW_EH_PE_absptr)
 928
 929 #define ASM_OUTPUT_DWARF_DELTA(FILE,SIZE,LABEL1,LABEL2)  \
 930   darwin_asm_output_dwarf_delta (FILE, SIZE, LABEL1, LABEL2)
 931
 932 #define ASM_OUTPUT_DWARF_OFFSET(FILE,SIZE,LABEL,BASE)  \
 933   darwin_asm_output_dwarf_offset (FILE, SIZE, LABEL, BASE)
 934
 935 #define ASM_MAYBE_OUTPUT_ENCODED_ADDR_RTX(ASM_OUT_FILE, ENCODING, SIZE, ADDR, DONE)     \
 936       if (ENCODING == ASM_PREFERRED_EH_DATA_FORMAT (2, 1)) {                            \
 937         darwin_non_lazy_pcrel (ASM_OUT_FILE, ADDR);                                     \
 938         goto DONE;                                                                      \
 939       }
 940
 941 /* Experimentally, putting jump tables in text is faster on SPEC.
 942    Also this is needed for correctness for coalesced functions.  */
 943
 944 #ifndef JUMP_TABLES_IN_TEXT_SECTION
 945 #define JUMP_TABLES_IN_TEXT_SECTION 1
 946 #endif
 947
 948 #define TARGET_TERMINATE_DW2_EH_FRAME_INFO false
 949
 950 #define TARGET_ASM_INIT_SECTIONS darwin_init_sections
 951 #undef TARGET_ASM_NAMED_SECTION
 952 #define TARGET_ASM_NAMED_SECTION darwin_asm_named_section
 953
 954 /* Handle pragma weak and pragma pack.  */
 955 #define HANDLE_SYSV_PRAGMA 1
 956
 957 #define HANDLE_PRAGMA_PACK_PUSH_POP 1
 958
 959 #define DARWIN_REGISTER_TARGET_PRAGMAS()                        \
 960   do {                                                          \
 961     if (!flag_preprocess_only)                                  \
 962       cpp_register_pragma (parse_in, NULL, "mark",              \
 963                            darwin_pragma_ignore, false);        \
 964     c_register_pragma (0, "options", darwin_pragma_options);    \
 965     c_register_pragma (0, "segment", darwin_pragma_ignore);     \
 966     c_register_pragma (0, "unused", darwin_pragma_unused);      \
 967     c_register_pragma (0, "ms_struct", darwin_pragma_ms_struct); \
 968   } while (0)
 969
 970 #undef ASM_APP_ON
 971 #define ASM_APP_ON ""
 972 #undef ASM_APP_OFF
 973 #define ASM_APP_OFF ""
 974
 975 void darwin_register_frameworks (const char *, const char *, int);
 976 void darwin_register_objc_includes (const char *, const char *, int);
 977 #define TARGET_EXTRA_PRE_INCLUDES darwin_register_objc_includes
 978 #define TARGET_EXTRA_INCLUDES darwin_register_frameworks
 979
 980 void add_framework_path (char *);
 981 #define TARGET_OPTF add_framework_path
 982
 983 #define TARGET_POSIX_IO
 984
 985 /* All new versions of Darwin have C99 functions.  */
 986
 987 #define TARGET_C99_FUNCTIONS 1
 988
 989 #define WINT_TYPE "int"
 990
 991 /* Every program on darwin links against libSystem which contains the pthread
 992    routines, so there's no need to explicitly call out when doing threaded
 993    work.  */
 994
 995 #undef GOMP_SELF_SPECS
 996 #define GOMP_SELF_SPECS ""
 997
 998 /* Darwin can't support anchors until we can cope with the adjustments
 999    to size that ASM_DECLARE_OBJECT_NAME and ASM_DECLARE_CONSTANT_NAME
1000    when outputting members of an anchor block and the linker can be
1001    taught to keep them together or we find some other suitable
1002    code-gen technique.  */
1003
1004 #if 0
1005 #define TARGET_ASM_OUTPUT_ANCHOR darwin_asm_output_anchor
1006 #else
1007 #define TARGET_ASM_OUTPUT_ANCHOR NULL
1008 #endif
1009
1010 /* Attempt to turn on execute permission for the stack.  This may be
1011     used by TARGET_TRAMPOLINE_INIT if the target needs it (that is,
1012     if the target machine can change execute permissions on a page).
1013
1014     There is no way to query the execute permission of the stack, so
1015     we always issue the mprotect() call.
1016
1017     Unfortunately it is not possible to make this namespace-clean.
1018
1019     Also note that no errors should be emitted by this code; it is
1020     considered dangerous for library calls to send messages to
1021     stdout/stderr.  */
1022
1023 #define ENABLE_EXECUTE_STACK                                            \
1024 extern void __enable_execute_stack (void *);                            \
1025 void                                                                    \
1026 __enable_execute_stack (void *addr)                                     \
1027 {                                                                       \
1028    extern int mprotect (void *, size_t, int);                           \
1029    extern int getpagesize (void);                                       \
1030    static int size;                                                     \
1031    static long mask;                                                    \
1032                                                                         \
1033    char *page, *end;                                                    \
1034                                                                         \
1035    if (size == 0)                                                       \
1036      {                                                                  \
1037        size = getpagesize();                                            \
1038        mask = ~((long) size - 1);                                       \
1039      }                                                                  \
1040                                                                         \
1041    page = (char *) (((long) addr) & mask);                              \
1042    end  = (char *) ((((long) (addr + (TARGET_64BIT ? 48 : 40))) & mask) + size); \
1043                                                                         \
1044    /* 7 == PROT_READ | PROT_WRITE | PROT_EXEC */                        \
1045    (void) mprotect (page, end - page, 7);                               \
1046 }
1047
1048 /* For Apple KEXTs, we make the constructors return this to match gcc
1049    2.95.  */
1050 #define TARGET_CXX_CDTOR_RETURNS_THIS (darwin_kextabi_p)
1051 extern int flag_mkernel;
1052 extern int flag_apple_kext;
1053 #define TARGET_KEXTABI flag_apple_kext
1054
1055 #define TARGET_HAS_TARGETCM 1
1056
1057 #ifndef CROSS_DIRECTORY_STRUCTURE
1058 extern void darwin_default_min_version (int * argc, char *** argv);
1059 #define GCC_DRIVER_HOST_INITIALIZATION \
1060   darwin_default_min_version (&argc, &argv)
1061 #endif /* CROSS_DIRECTORY_STRUCTURE */
1062
1063 /* The Apple assembler and linker do not support constructor priorities.  */
1064 #undef SUPPORTS_INIT_PRIORITY
1065 #define SUPPORTS_INIT_PRIORITY 0
1066
1067 #endif /* CONFIG_DARWIN_H */