gcc/config/darwin.h

   1 /* Target definitions for Darwin (Mac OS X) systems.
   2    Copyright (C) 1989, 1990, 1991, 1992, 1993, 2000, 2001, 2002, 2003, 2004,
   3    2005, 2006, 2007, 2008, 2009, 2010, 2011
   4    Free Software Foundation, Inc.
   5    Contributed by Apple Computer Inc.
   6
   7 This file is part of GCC.
   8
   9 GCC is free software; you can redistribute it and/or modify
  10 it under the terms of the GNU General Public License as published by
  11 the Free Software Foundation; either version 3, or (at your option)
  12 any later version.
  13
  14 GCC is distributed in the hope that it will be useful,
  15 but WITHOUT ANY WARRANTY; without even the implied warranty of
  16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17 GNU General Public License for more details.
  18
  19 Under Section 7 of GPL version 3, you are granted additional
  20 permissions described in the GCC Runtime Library Exception, version
  21 3.1, as published by the Free Software Foundation.
  22
  23 You should have received a copy of the GNU General Public License and
  24 a copy of the GCC Runtime Library Exception along with this program;
  25 see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
  26 <http://www.gnu.org/licenses/>.  */
  27
  28 #ifndef CONFIG_DARWIN_H
  29 #define CONFIG_DARWIN_H
  30
  31 /* The definitions in this file are common to all processor types
  32    running Darwin, which is the kernel for Mac OS X.  Darwin is
  33    basically a BSD user layer laid over a Mach kernel, then evolved
  34    for many years (at NeXT) in parallel with other Unix systems.  So
  35    while the runtime is a somewhat idiosyncratic Mach-based thing,
  36    other definitions look like they would for a BSD variant.  */
  37
  38 /* Although NeXT ran on many different architectures, as of Jan 2001
  39    the only supported Darwin targets are PowerPC and x86.  */
  40
  41 /* One of Darwin's NeXT legacies is the Mach-O format, which is partly
  42    like a.out and partly like COFF, with additional features like
  43    multi-architecture binary support.  */
  44
  45 #define DARWIN_X86 0
  46 #define DARWIN_PPC 0
  47
  48 /* Don't assume anything about the header files.  */
  49 #define NO_IMPLICIT_EXTERN_C
  50
  51 /* Suppress g++ attempt to link in the math library automatically. */
  52 #define MATH_LIBRARY ""
  53
  54 /* We have atexit.  */
  55
  56 #define HAVE_ATEXIT
  57
  58 /* Define an empty body for the function do_global_dtors() in libgcc2.c.  */
  59
  60 #define DO_GLOBAL_DTORS_BODY
  61
  62 /* The string value for __SIZE_TYPE__.  */
  63
  64 #ifndef SIZE_TYPE
  65 #define SIZE_TYPE "long unsigned int"
  66 #endif
  67
  68 /* Type used for ptrdiff_t, as a string used in a declaration.  */
  69
  70 #undef  PTRDIFF_TYPE
  71 #define PTRDIFF_TYPE "int"
  72
  73 /* wchar_t is int.  */
  74
  75 #undef  WCHAR_TYPE
  76 #define WCHAR_TYPE "int"
  77 #undef  WCHAR_TYPE_SIZE
  78 #define WCHAR_TYPE_SIZE 32
  79
  80 #define INT8_TYPE "signed char"
  81 #define INT16_TYPE "short int"
  82 #define INT32_TYPE "int"
  83 #define INT64_TYPE "long long int"
  84 #define UINT8_TYPE "unsigned char"
  85 #define UINT16_TYPE "short unsigned int"
  86 #define UINT32_TYPE "unsigned int"
  87 #define UINT64_TYPE "long long unsigned int"
  88
  89 #define INT_LEAST8_TYPE "signed char"
  90 #define INT_LEAST16_TYPE "short int"
  91 #define INT_LEAST32_TYPE "int"
  92 #define INT_LEAST64_TYPE "long long int"
  93 #define UINT_LEAST8_TYPE "unsigned char"
  94 #define UINT_LEAST16_TYPE "short unsigned int"
  95 #define UINT_LEAST32_TYPE "unsigned int"
  96 #define UINT_LEAST64_TYPE "long long unsigned int"
  97
  98 #define INT_FAST8_TYPE "signed char"
  99 #define INT_FAST16_TYPE "short int"
 100 #define INT_FAST32_TYPE "int"
 101 #define INT_FAST64_TYPE "long long int"
 102 #define UINT_FAST8_TYPE "unsigned char"
 103 #define UINT_FAST16_TYPE "short unsigned int"
 104 #define UINT_FAST32_TYPE "unsigned int"
 105 #define UINT_FAST64_TYPE "long long unsigned int"
 106
 107 #define INTPTR_TYPE "long int"
 108 #define UINTPTR_TYPE "long unsigned int"
 109
 110 #define SIG_ATOMIC_TYPE "int"
 111
 112 /* Default to using the NeXT-style runtime, since that's what is
 113    pre-installed on Darwin systems.  */
 114
 115 #define NEXT_OBJC_RUNTIME
 116
 117 /* Don't default to pcc-struct-return, because gcc is the only compiler, and
 118    we want to retain compatibility with older gcc versions.  */
 119
 120 #undef  DEFAULT_PCC_STRUCT_RETURN
 121 #define DEFAULT_PCC_STRUCT_RETURN 0
 122
 123 /* True if pragma ms_struct is in effect.  */
 124 extern GTY(()) int darwin_ms_struct;
 125
 126 #define DRIVER_SELF_SPECS                                       \
 127   "%{gfull:-g -fno-eliminate-unused-debug-symbols} %<gfull",    \
 128   "%{gused:-g -feliminate-unused-debug-symbols} %<gused",       \
 129   "%{fapple-kext|mkernel:-static}",                             \
 130   "%{shared:-Zdynamiclib} %<shared"
 131
 132 #define DARWIN_CC1_SPEC                                                 \
 133   "%{findirect-virtual-calls: -fapple-kext} %<findirect-virtual-calls " \
 134   "%{fterminated-vtables: -fapple-kext} %<fterminated-vtables "         \
 135   "%<filelist* %<framework*"
 136
 137 #define SUBSUBTARGET_OVERRIDE_OPTIONS                                   \
 138   do {                                                                  \
 139     darwin_override_options ();                                         \
 140   } while (0)
 141
 142 #define SUBTARGET_C_COMMON_OVERRIDE_OPTIONS do {                        \
 143   /* Unless set, force ABI=2 for NeXT and m64, 0 otherwise.  */         \
 144   if (!global_options_set.x_flag_objc_abi)                              \
 145     global_options.x_flag_objc_abi                                      \
 146         = (flag_next_runtime && TARGET_64BIT) ? 2 : 0;                  \
 147   /* Objective-C family ABI 2 is only valid for next/m64 at present. */ \
 148   if (global_options_set.x_flag_objc_abi && flag_next_runtime)          \
 149     if (TARGET_64BIT && global_options.x_flag_objc_abi < 2)             \
 150       error_at (UNKNOWN_LOCATION, "%<-fobjc-abi-version%> >= 2 is only" \
 151                 " supported on %<-m64%> targets for"                    \
 152                 " %<-fnext-runtime%>");                                 \
 153   /* Sort out ObjC exceptions: If the runtime is NeXT we default to     \
 154      sjlj for m32 only.  */                                             \
 155   if (!global_options_set.x_flag_objc_sjlj_exceptions)                  \
 156     global_options.x_flag_objc_sjlj_exceptions =                        \
 157                                 flag_next_runtime && !TARGET_64BIT;     \
 158     if (flag_mkernel || flag_apple_kext)                                \
 159       {                                                                 \
 160         if (flag_use_cxa_atexit == 2)                                   \
 161           flag_use_cxa_atexit = 0;                                      \
 162         /* kexts should always be built without the coalesced sections  \
 163            because the kernel loader doesn't grok such sections.  */    \
 164         flag_weak = 0;                                                  \
 165         /* No RTTI in kexts.  */                                        \
 166         flag_rtti = 0;                                                  \
 167       }                                                                 \
 168   } while (0)
 169
 170 /* Machine dependent cpp options.  Don't add more options here, add
 171    them to darwin_cpp_builtins in darwin-c.c.  */
 172
 173 #undef  CPP_SPEC
 174 #define CPP_SPEC "%{static:%{!dynamic:-D__STATIC__}}%{!static:-D__DYNAMIC__}" \
 175         " %{pthread:-D_REENTRANT}"
 176
 177 /* This is mostly a clone of the standard LINK_COMMAND_SPEC, plus
 178    precomp, libtool, and fat build additions.
 179
 180    In general, random Darwin linker flags should go into LINK_SPEC
 181    instead of LINK_COMMAND_SPEC.  The command spec is better for
 182    specifying the handling of options understood by generic Unix
 183    linkers, and for positional arguments like libraries.  */
 184
 185 #define LINK_COMMAND_SPEC_A \
 186    "%{!fdump=*:%{!fsyntax-only:%{!c:%{!M:%{!MM:%{!E:%{!S:\
 187     %(linker)" \
 188     LINK_PLUGIN_SPEC \
 189     "%{flto*:%<fcompare-debug*} \
 190     %{flto*} \
 191     %l %X %{s} %{t} %{Z} %{u*} \
 192     %{e*} %{r} \
 193     %{o*}%{!o:-o a.out} \
 194     %{!nostdlib:%{!nostartfiles:%S}} \
 195     %{L*} %(link_libgcc) %o %{fprofile-arcs|fprofile-generate*|coverage:-lgcov} \
 196     %{fopenmp|ftree-parallelize-loops=*: \
 197       %{static|static-libgcc|static-libstdc++|static-libgfortran: libgomp.a%s; : -lgomp } } \
 198     %{!nostdlib:%{!nodefaultlibs:\
 199       %(link_ssp) %(link_gcc_c_sequence)\
 200     }}\
 201     %{!nostdlib:%{!nostartfiles:%E}} %{T*} %{F*} }}}}}}}"
 202
 203 #define DSYMUTIL "\ndsymutil"
 204
 205 #define DSYMUTIL_SPEC \
 206    "%{!fdump=*:%{!fsyntax-only:%{!c:%{!M:%{!MM:%{!E:%{!S:\
 207     %{v} \
 208     %{gdwarf-2:%{!gstabs*:%{!g0: -idsym}}}\
 209     %{.c|.cc|.C|.cpp|.cp|.c++|.cxx|.CPP|.m|.mm: \
 210     %{gdwarf-2:%{!gstabs*:%{!g0: -dsym}}}}}}}}}}}"
 211
 212 #define LINK_COMMAND_SPEC LINK_COMMAND_SPEC_A DSYMUTIL_SPEC
 213
 214 /* Tell collect2 to run dsymutil for us as necessary.  */
 215 #define COLLECT_RUN_DSYMUTIL 1
 216
 217 /* We only want one instance of %G, since libSystem (Darwin's -lc) does not depend
 218    on libgcc.  */
 219 #undef  LINK_GCC_C_SEQUENCE_SPEC
 220 #define LINK_GCC_C_SEQUENCE_SPEC "%G %L"
 221
 222 #ifdef TARGET_SYSTEM_ROOT
 223 #define LINK_SYSROOT_SPEC \
 224   "%{isysroot*:-syslibroot %*;:-syslibroot " TARGET_SYSTEM_ROOT "}"
 225 #else
 226 #define LINK_SYSROOT_SPEC "%{isysroot*:-syslibroot %*}"
 227 #endif
 228
 229 #define PIE_SPEC "%{fpie|pie|fPIE:}"
 230
 231 /* Please keep the random linker options in alphabetical order (modulo
 232    'Z' and 'no' prefixes). Note that options taking arguments may appear
 233    multiple times on a command line with different arguments each time,
 234    so put a * after their names so all of them get passed.  */
 235 #define LINK_SPEC  \
 236   "%{static}%{!static:-dynamic} \
 237    %:remove-outfile(-ldl) \
 238    %:remove-outfile(-lm) \
 239    %:remove-outfile(-lpthread) \
 240    %{fgnu-runtime: %{static|static-libgcc: \
 241                      %:replace-outfile(-lobjc libobjc-gnu.a%s); \
 242                     :%:replace-outfile(-lobjc -lobjc-gnu ) } }\
 243    %{static|static-libgcc|static-libgfortran:%:replace-outfile(-lgfortran libgfortran.a%s)}\
 244    %{static|static-libgcc|static-libstdc++|static-libgfortran:%:replace-outfile(-lgomp libgomp.a%s)}\
 245    %{static|static-libgcc|static-libstdc++:%:replace-outfile(-lstdc++ libstdc++.a%s)}\
 246    %{!Zdynamiclib: \
 247      %{Zforce_cpusubtype_ALL:-arch %(darwin_arch) -force_cpusubtype_ALL} \
 248      %{!Zforce_cpusubtype_ALL:-arch %(darwin_subarch)} \
 249      %{Zbundle:-bundle} \
 250      %{Zbundle_loader*:-bundle_loader %*} \
 251      %{client_name*} \
 252      %{compatibility_version*:%e-compatibility_version only allowed with -dynamiclib\
 253 } \
 254      %{current_version*:%e-current_version only allowed with -dynamiclib} \
 255      %{Zforce_flat_namespace:-force_flat_namespace} \
 256      %{Zinstall_name*:%e-install_name only allowed with -dynamiclib} \
 257      %{keep_private_externs} \
 258      %{private_bundle} \
 259     } \
 260    %{Zdynamiclib: -dylib \
 261      %{Zbundle:%e-bundle not allowed with -dynamiclib} \
 262      %{Zbundle_loader*:%e-bundle_loader not allowed with -dynamiclib} \
 263      %{client_name*:%e-client_name not allowed with -dynamiclib} \
 264      %{compatibility_version*:-dylib_compatibility_version %*} \
 265      %{current_version*:-dylib_current_version %*} \
 266      %{Zforce_cpusubtype_ALL:-arch %(darwin_arch)} \
 267      %{!Zforce_cpusubtype_ALL: -arch %(darwin_subarch)} \
 268      %{Zforce_flat_namespace:%e-force_flat_namespace not allowed with -dynamiclib} \
 269      %{Zinstall_name*:-dylib_install_name %*} \
 270      %{keep_private_externs:%e-keep_private_externs not allowed with -dynamiclib} \
 271      %{private_bundle:%e-private_bundle not allowed with -dynamiclib} \
 272     } \
 273    %{Zall_load:-all_load} \
 274    %{Zallowable_client*:-allowable_client %*} \
 275    %{Zbind_at_load:-bind_at_load} \
 276    %{Zarch_errors_fatal:-arch_errors_fatal} \
 277    %{Zdead_strip:-dead_strip} \
 278    %{Zno_dead_strip_inits_and_terms:-no_dead_strip_inits_and_terms} \
 279    %{Zdylib_file*:-dylib_file %*} \
 280    %{Zdynamic:-dynamic}\
 281    %{Zexported_symbols_list*:-exported_symbols_list %*} \
 282    %{Zflat_namespace:-flat_namespace} \
 283    %{headerpad_max_install_names} \
 284    %{Zimage_base*:-image_base %*} \
 285    %{Zinit*:-init %*} \
 286    %{!mmacosx-version-min=*:-macosx_version_min %(darwin_minversion)} \
 287    %{mmacosx-version-min=*:-macosx_version_min %*} \
 288    %{nomultidefs} \
 289    %{Zmulti_module:-multi_module} %{Zsingle_module:-single_module} \
 290    %{Zmultiply_defined*:-multiply_defined %*} \
 291    %{!Zmultiply_defined*:%{shared-libgcc: \
 292      %:version-compare(< 10.5 mmacosx-version-min= -multiply_defined) \
 293      %:version-compare(< 10.5 mmacosx-version-min= suppress)}} \
 294    %{Zmultiplydefinedunused*:-multiply_defined_unused %*} \
 295    " PIE_SPEC " \
 296    %{prebind} %{noprebind} %{nofixprebinding} %{prebind_all_twolevel_modules} \
 297    %{read_only_relocs} \
 298    %{sectcreate*} %{sectorder*} %{seg1addr*} %{segprot*} \
 299    %{Zsegaddr*:-segaddr %*} \
 300    %{Zsegs_read_only_addr*:-segs_read_only_addr %*} \
 301    %{Zsegs_read_write_addr*:-segs_read_write_addr %*} \
 302    %{Zseg_addr_table*: -seg_addr_table %*} \
 303    %{Zfn_seg_addr_table_filename*:-seg_addr_table_filename %*} \
 304    %{sub_library*} %{sub_umbrella*} \
 305    " LINK_SYSROOT_SPEC " \
 306    %{twolevel_namespace} %{twolevel_namespace_hints} \
 307    %{Zumbrella*: -umbrella %*} \
 308    %{undefined*} \
 309    %{Zunexported_symbols_list*:-unexported_symbols_list %*} \
 310    %{Zweak_reference_mismatches*:-weak_reference_mismatches %*} \
 311    %{!Zweak_reference_mismatches*:-weak_reference_mismatches non-weak} \
 312    %{X} \
 313    %{y*} \
 314    %{w} \
 315    %{pagezero_size*} %{segs_read_*} %{seglinkedit} %{noseglinkedit}  \
 316    %{sectalign*} %{sectobjectsymbols*} %{segcreate*} %{whyload} \
 317    %{whatsloaded} %{dylinker_install_name*} \
 318    %{dylinker} %{Mach} "
 319
 320
 321 /* Machine dependent libraries.  */
 322
 323 #define LIB_SPEC "%{!static:-lSystem}"
 324
 325 /* Support -mmacosx-version-min by supplying different (stub) libgcc_s.dylib
 326    libraries to link against, and by not linking against libgcc_s on
 327    earlier-than-10.3.9.
 328
 329    Note that by default, -lgcc_eh is not linked against!  This is
 330    because in a future version of Darwin the EH frame information may
 331    be in a new format, or the fallback routine might be changed; if
 332    you want to explicitly link against the static version of those
 333    routines, because you know you don't need to unwind through system
 334    libraries, you need to explicitly say -static-libgcc.
 335
 336    If it is linked against, it has to be before -lgcc, because it may
 337    need symbols from -lgcc.  */
 338 #undef REAL_LIBGCC_SPEC
 339 #define REAL_LIBGCC_SPEC                                                   \
 340    "%{static-libgcc|static: -lgcc_eh -lgcc;                                \
 341       shared-libgcc|fexceptions|fgnu-runtime:                              \
 342        %:version-compare(!> 10.5 mmacosx-version-min= -lgcc_s.10.4)        \
 343        %:version-compare(>< 10.5 10.6 mmacosx-version-min= -lgcc_s.10.5)   \
 344        %:version-compare(!> 10.5 mmacosx-version-min= -lgcc_ext.10.4)      \
 345        %:version-compare(>= 10.5 mmacosx-version-min= -lgcc_ext.10.5)      \
 346        -lgcc ;                                                             \
 347       :%:version-compare(>< 10.3.9 10.5 mmacosx-version-min= -lgcc_s.10.4) \
 348        %:version-compare(>< 10.5 10.6 mmacosx-version-min= -lgcc_s.10.5)   \
 349        %:version-compare(!> 10.5 mmacosx-version-min= -lgcc_ext.10.4)      \
 350        %:version-compare(>= 10.5 mmacosx-version-min= -lgcc_ext.10.5)      \
 351        -lgcc }"
 352
 353 /* We specify crt0.o as -lcrt0.o so that ld will search the library path.
 354
 355    crt3.o provides __cxa_atexit on systems that don't have it.  Since
 356    it's only used with C++, which requires passing -shared-libgcc, key
 357    off that to avoid unnecessarily adding a destructor to every
 358    powerpc program built.  */
 359
 360 #undef  STARTFILE_SPEC
 361 #define STARTFILE_SPEC                                                      \
 362   "%{Zdynamiclib: %(darwin_dylib1) }                                        \
 363    %{!Zdynamiclib:%{Zbundle:%{!static:-lbundle1.o}}                         \
 364      %{!Zbundle:%{pg:%{static:-lgcrt0.o}                                    \
 365                      %{!static:%{object:-lgcrt0.o}                          \
 366                                %{!object:%{preload:-lgcrt0.o}               \
 367                                  %{!preload:-lgcrt1.o %(darwin_crt2)}}}}    \
 368                 %{!pg:%{static:-lcrt0.o}                                    \
 369                       %{!static:%{object:-lcrt0.o}                          \
 370                                 %{!object:%{preload:-lcrt0.o}               \
 371                                   %{!preload: %(darwin_crt1)                \
 372                                               %(darwin_crt2)}}}}}}          \
 373   %{shared-libgcc:%:version-compare(< 10.5 mmacosx-version-min= crt3.o%s)}"
 374
 375 /* The native Darwin linker doesn't necessarily place files in the order
 376    that they're specified on the link line.  Thus, it is pointless
 377    to put anything in ENDFILE_SPEC.  */
 378 /* #define ENDFILE_SPEC "" */
 379
 380 #define DARWIN_EXTRA_SPECS                                              \
 381   { "darwin_crt1", DARWIN_CRT1_SPEC },                                  \
 382   { "darwin_dylib1", DARWIN_DYLIB1_SPEC },                              \
 383   { "darwin_minversion", DARWIN_MINVERSION_SPEC },
 384
 385 #define DARWIN_DYLIB1_SPEC                                              \
 386   "%:version-compare(!> 10.5 mmacosx-version-min= -ldylib1.o)           \
 387    %:version-compare(>= 10.5 mmacosx-version-min= -ldylib1.10.5.o)"
 388
 389 #define DARWIN_CRT1_SPEC                                                \
 390   "%:version-compare(!> 10.5 mmacosx-version-min= -lcrt1.o)             \
 391    %:version-compare(>= 10.5 mmacosx-version-min= -lcrt1.10.5.o)"
 392
 393 /* Default Darwin ASM_SPEC, very simple.  */
 394 #define ASM_SPEC "-arch %(darwin_arch) \
 395   %{Zforce_cpusubtype_ALL:-force_cpusubtype_ALL} \
 396   %{static}"
 397
 398 /* We still allow output of STABS.  */
 399
 400 #define DBX_DEBUGGING_INFO 1
 401
 402 #define DWARF2_DEBUGGING_INFO 1
 403 #define PREFERRED_DEBUGGING_TYPE DBX_DEBUG
 404
 405 #define DEBUG_FRAME_SECTION     "__DWARF,__debug_frame,regular,debug"
 406 #define DEBUG_INFO_SECTION      "__DWARF,__debug_info,regular,debug"
 407 #define DEBUG_ABBREV_SECTION    "__DWARF,__debug_abbrev,regular,debug"
 408 #define DEBUG_ARANGES_SECTION   "__DWARF,__debug_aranges,regular,debug"
 409 #define DEBUG_MACINFO_SECTION   "__DWARF,__debug_macinfo,regular,debug"
 410 #define DEBUG_LINE_SECTION      "__DWARF,__debug_line,regular,debug"
 411 #define DEBUG_LOC_SECTION       "__DWARF,__debug_loc,regular,debug"
 412 #define DEBUG_PUBNAMES_SECTION  "__DWARF,__debug_pubnames,regular,debug"
 413 #define DEBUG_PUBTYPES_SECTION  "__DWARF,__debug_pubtypes,regular,debug"
 414 #define DEBUG_STR_SECTION       "__DWARF,__debug_str,regular,debug"
 415 #define DEBUG_RANGES_SECTION    "__DWARF,__debug_ranges,regular,debug"
 416 #define DEBUG_MACRO_SECTION    "__DWARF,__debug_macro,regular,debug"
 417
 418 #define TARGET_WANT_DEBUG_PUB_SECTIONS true
 419
 420 /* When generating stabs debugging, use N_BINCL entries.  */
 421
 422 #define DBX_USE_BINCL
 423
 424 /* There is no limit to the length of stabs strings.  */
 425
 426 #define DBX_CONTIN_LENGTH 0
 427
 428 /* gdb needs a null N_SO at the end of each file for scattered loading.  */
 429
 430 #define DBX_OUTPUT_NULL_N_SO_AT_MAIN_SOURCE_FILE_END
 431
 432 /* GCC's definition of 'one_only' is the same as its definition of 'weak'.  */
 433 #define MAKE_DECL_ONE_ONLY(DECL) (DECL_WEAK (DECL) = 1)
 434
 435 /* Mach-O supports 'weak imports', and 'weak definitions' in coalesced
 436    sections.  machopic_select_section ensures that weak variables go in
 437    coalesced sections.  Weak aliases (or any other kind of aliases) are
 438    not supported.  Weak symbols that aren't visible outside the .s file
 439    are not supported.  */
 440 #define ASM_WEAKEN_DECL(FILE, DECL, NAME, ALIAS)                        \
 441   do {                                                                  \
 442     if (ALIAS)                                                          \
 443       {                                                                 \
 444         warning (0, "alias definitions not supported in Mach-O; ignored");      \
 445         break;                                                          \
 446       }                                                                 \
 447                                                                         \
 448     if (! DECL_EXTERNAL (DECL) && TREE_PUBLIC (DECL))                   \
 449       targetm.asm_out.globalize_label (FILE, NAME);                     \
 450     if (DECL_EXTERNAL (DECL))                                           \
 451       fputs ("\t.weak_reference ", FILE);                               \
 452     else if (lookup_attribute ("weak_import", DECL_ATTRIBUTES (DECL)))  \
 453       break;                                                            \
 454     else if (TREE_PUBLIC (DECL))                                        \
 455       fputs ("\t.weak_definition ", FILE);                              \
 456     else                                                                \
 457       break;                                                            \
 458     assemble_name (FILE, NAME);                                         \
 459     fputc ('\n', FILE);                                                 \
 460   } while (0)
 461
 462 /* Darwin has the pthread routines in libSystem, which every program
 463    links to, so there's no need for weak-ness for that.  */
 464 #define GTHREAD_USE_WEAK 0
 465
 466 /* The Darwin linker imposes two limitations on common symbols: they
 467    can't have hidden visibility, and they can't appear in dylibs.  As
 468    a consequence, we should never use common symbols to represent
 469    vague linkage. */
 470 #undef USE_COMMON_FOR_ONE_ONLY
 471 #define USE_COMMON_FOR_ONE_ONLY 0
 472
 473 /* The Darwin linker doesn't want coalesced symbols to appear in
 474    a static archive's table of contents. */
 475 #undef TARGET_WEAK_NOT_IN_ARCHIVE_TOC
 476 #define TARGET_WEAK_NOT_IN_ARCHIVE_TOC 1
 477
 478 /* On Darwin, we don't (at the time of writing) have linkonce sections
 479    with names, so it's safe to make the class data not comdat.  */
 480 #define TARGET_CXX_CLASS_DATA_ALWAYS_COMDAT hook_bool_void_false
 481
 482 /* For efficiency, on Darwin the RTTI information that is always
 483    emitted in the standard C++ library should not be COMDAT.  */
 484 #define TARGET_CXX_LIBRARY_RTTI_COMDAT hook_bool_void_false
 485
 486 /* We make exception information linkonce. */
 487 #undef TARGET_USES_WEAK_UNWIND_INFO
 488 #define TARGET_USES_WEAK_UNWIND_INFO 1
 489
 490 /* We need to use a nonlocal label for the start of an EH frame: the
 491    Darwin linker requires that a coalesced section start with a label.
 492    Unfortunately, it also requires that 'debug' sections don't contain
 493    labels.  */
 494 #undef FRAME_BEGIN_LABEL
 495 #define FRAME_BEGIN_LABEL (for_eh ? "EH_frame" : "Lframe")
 496
 497 /* Emit a label for the FDE corresponding to DECL.  EMPTY means
 498    emit a label for an empty FDE. */
 499 #define TARGET_ASM_EMIT_UNWIND_LABEL darwin_emit_unwind_label
 500
 501 /* Emit a label to separate the exception table.  */
 502 #define TARGET_ASM_EMIT_EXCEPT_TABLE_LABEL darwin_emit_except_table_label
 503
 504 /* Our profiling scheme doesn't LP labels and counter words.  */
 505
 506 #define NO_PROFILE_COUNTERS     1
 507
 508 #undef  INIT_SECTION_ASM_OP
 509 #define INIT_SECTION_ASM_OP
 510
 511 #undef  INVOKE__main
 512
 513 #define TARGET_ASM_CONSTRUCTOR  machopic_asm_out_constructor
 514 #define TARGET_ASM_DESTRUCTOR   machopic_asm_out_destructor
 515
 516 /* Always prefix with an underscore.  */
 517
 518 #define USER_LABEL_PREFIX "_"
 519
 520 /* A dummy symbol that will be replaced with the function base name.  */
 521 #define MACHOPIC_FUNCTION_BASE_NAME "<pic base>"
 522
 523 /* Don't output a .file directive.  That is only used by the assembler for
 524    error reporting.  */
 525 #undef  TARGET_ASM_FILE_START_FILE_DIRECTIVE
 526 #define TARGET_ASM_FILE_START_FILE_DIRECTIVE false
 527
 528 #undef  TARGET_ASM_FILE_END
 529 #define TARGET_ASM_FILE_END darwin_file_end
 530
 531 /* Because Mach-O relocations have a counter from 1 to 255 for the
 532    section number they apply to, it is necessary to output all
 533    normal sections before the LTO sections, to make sure that the
 534    sections that may have relocations always have a section number
 535    smaller than 255.  */
 536 #undef  TARGET_ASM_LTO_START
 537 #define TARGET_ASM_LTO_START darwin_asm_lto_start
 538 #undef  TARGET_ASM_LTO_END
 539 #define TARGET_ASM_LTO_END darwin_asm_lto_end
 540
 541 #define ASM_OUTPUT_SKIP(FILE,SIZE)  \
 542   fprintf (FILE, "\t.space "HOST_WIDE_INT_PRINT_UNSIGNED"\n", SIZE)
 543
 544 /* Give ObjC methods pretty symbol names.  */
 545
 546 #undef  OBJC_GEN_METHOD_LABEL
 547 #define OBJC_GEN_METHOD_LABEL(BUF,IS_INST,CLASS_NAME,CAT_NAME,SEL_NAME,NUM) \
 548   do { if (CAT_NAME)                                                    \
 549          sprintf (BUF, "%c[%s(%s) %s]", (IS_INST) ? '-' : '+',          \
 550                   (CLASS_NAME), (CAT_NAME), (SEL_NAME));                \
 551        else                                                             \
 552          sprintf (BUF, "%c[%s %s]", (IS_INST) ? '-' : '+',              \
 553                   (CLASS_NAME), (SEL_NAME));                            \
 554      } while (0)
 555
 556 #undef ASM_DECLARE_OBJECT_NAME
 557 #define ASM_DECLARE_OBJECT_NAME(FILE, NAME, DECL) \
 558         darwin_asm_declare_object_name ((FILE), (NAME), (DECL))
 559
 560 /* The RTTI data (e.g., __ti4name) is common and public (and static),
 561    but it does need to be referenced via indirect PIC data pointers.
 562    The machopic_define_symbol calls are telling the machopic subsystem
 563    that the name *is* defined in this module, so it doesn't need to
 564    make them indirect.  */
 565
 566 #define ASM_DECLARE_FUNCTION_NAME(FILE, NAME, DECL)                     \
 567   do {                                                                  \
 568     const char *xname = NAME;                                           \
 569     if (GET_CODE (XEXP (DECL_RTL (DECL), 0)) != SYMBOL_REF)             \
 570       xname = IDENTIFIER_POINTER (DECL_NAME (DECL));                    \
 571     if (! DECL_WEAK (DECL)                                              \
 572         && ((TREE_STATIC (DECL)                                         \
 573              && (!DECL_COMMON (DECL) || !TREE_PUBLIC (DECL)))           \
 574             || DECL_INITIAL (DECL)))                                    \
 575         machopic_define_symbol (DECL_RTL (DECL));                       \
 576     if ((TREE_STATIC (DECL)                                             \
 577          && (!DECL_COMMON (DECL) || !TREE_PUBLIC (DECL)))               \
 578         || DECL_INITIAL (DECL))                                         \
 579       (* targetm.encode_section_info) (DECL, DECL_RTL (DECL), false);   \
 580     ASM_OUTPUT_FUNCTION_LABEL (FILE, xname, DECL);                      \
 581   } while (0)
 582
 583 #undef TARGET_ASM_DECLARE_CONSTANT_NAME
 584 #define TARGET_ASM_DECLARE_CONSTANT_NAME darwin_asm_declare_constant_name
 585
 586 /* Wrap new method names in quotes so the assembler doesn't gag.
 587    Make Objective-C internal symbols local and in doing this, we need
 588    to accommodate the name mangling done by c++ on file scope locals.  */
 589
 590 int darwin_label_is_anonymous_local_objc_name (const char *name);
 591
 592 #undef  ASM_OUTPUT_LABELREF
 593 #define ASM_OUTPUT_LABELREF(FILE,NAME)                                       \
 594   do {                                                                       \
 595        const char *xname = (NAME);                                           \
 596        if (! strcmp (xname, MACHOPIC_FUNCTION_BASE_NAME))                    \
 597          machopic_output_function_base_name(FILE);                           \
 598        else if (xname[0] == '&' || xname[0] == '*')                          \
 599          {                                                                   \
 600            int len = strlen (xname);                                         \
 601            if (len > 6 && !strcmp ("$stub", xname + len - 5))                \
 602              machopic_validate_stub_or_non_lazy_ptr (xname);                 \
 603            else if (len > 7 && !strcmp ("$stub\"", xname + len - 6))         \
 604              machopic_validate_stub_or_non_lazy_ptr (xname);                 \
 605            else if (len > 14 && !strcmp ("$non_lazy_ptr", xname + len - 13)) \
 606              machopic_validate_stub_or_non_lazy_ptr (xname);                 \
 607            else if (len > 15 && !strcmp ("$non_lazy_ptr\"", xname + len - 14)) \
 608              machopic_validate_stub_or_non_lazy_ptr (xname);                 \
 609            if (xname[1] != '"' && name_needs_quotes (&xname[1]))             \
 610              fprintf (FILE, "\"%s\"", &xname[1]);                            \
 611            else                                                              \
 612              fputs (&xname[1], FILE);                                        \
 613          }                                                                   \
 614        else if (xname[0] == '+' || xname[0] == '-')                          \
 615          fprintf (FILE, "\"%s\"", xname);                                    \
 616        else if (darwin_label_is_anonymous_local_objc_name (xname))           \
 617          fprintf (FILE, "L%s", xname);                                       \
 618        else if (!strncmp (xname, ".objc_class_name_", 17))                   \
 619          fprintf (FILE, "%s", xname);                                        \
 620        else if (xname[0] != '"' && name_needs_quotes (xname))                \
 621          fprintf (FILE, "\"%s\"", xname);                                    \
 622        else                                                                  \
 623          asm_fprintf (FILE, "%U%s", xname);                                  \
 624   } while (0)
 625
 626 /* Output before executable code.  */
 627 #undef TEXT_SECTION_ASM_OP
 628 #define TEXT_SECTION_ASM_OP "\t.text"
 629
 630 /* Output before writable data.  */
 631
 632 #undef DATA_SECTION_ASM_OP
 633 #define DATA_SECTION_ASM_OP "\t.data"
 634
 635 #undef  ALIGN_ASM_OP
 636 #define ALIGN_ASM_OP            ".align"
 637
 638 #undef  ASM_OUTPUT_ALIGN
 639 #define ASM_OUTPUT_ALIGN(FILE,LOG)      \
 640   if ((LOG) != 0)                       \
 641     fprintf (FILE, "\t%s\t%d\n", ALIGN_ASM_OP, (LOG))
 642
 643 /* The maximum alignment which the object file format can support in
 644    bits.  For Mach-O, this is 2^15 bytes.  */
 645
 646 #undef  MAX_OFILE_ALIGNMENT
 647 #define MAX_OFILE_ALIGNMENT (0x8000 * 8)
 648
 649 #define L2_MAX_OFILE_ALIGNMENT 15
 650
 651 /*  These are the three variants that emit referenced blank space.  */
 652 #define ASM_OUTPUT_ALIGNED_BSS(FILE, DECL, NAME, SIZE, ALIGN)           \
 653         darwin_output_aligned_bss ((FILE), (DECL), (NAME), (SIZE), (ALIGN))
 654
 655 #undef  ASM_OUTPUT_ALIGNED_DECL_LOCAL
 656 #define ASM_OUTPUT_ALIGNED_DECL_LOCAL(FILE, DECL, NAME, SIZE, ALIGN)    \
 657         darwin_asm_output_aligned_decl_local                            \
 658                                   ((FILE), (DECL), (NAME), (SIZE), (ALIGN))
 659
 660 #undef  ASM_OUTPUT_ALIGNED_DECL_COMMON
 661 #define ASM_OUTPUT_ALIGNED_DECL_COMMON(FILE, DECL, NAME, SIZE, ALIGN)   \
 662         darwin_asm_output_aligned_decl_common                           \
 663                                    ((FILE), (DECL), (NAME), (SIZE), (ALIGN))
 664
 665 /* The generic version, archs should over-ride where required.  */
 666 #define MACHOPIC_NL_SYMBOL_PTR_SECTION ".non_lazy_symbol_pointer"
 667
 668 /* Declare the section variables.  */
 669 #ifndef USED_FOR_TARGET
 670 enum darwin_section_enum {
 671 #define DEF_SECTION(NAME, FLAGS, DIRECTIVE, OBJC) NAME,
 672 #include "darwin-sections.def"
 673 #undef DEF_SECTION
 674   NUM_DARWIN_SECTIONS
 675 };
 676 extern GTY(()) section * darwin_sections[NUM_DARWIN_SECTIONS];
 677 #endif
 678
 679 #undef  TARGET_ASM_SELECT_SECTION
 680 #define TARGET_ASM_SELECT_SECTION machopic_select_section
 681
 682 #undef  TARGET_ASM_FUNCTION_SECTION
 683 #define TARGET_ASM_FUNCTION_SECTION darwin_function_section
 684
 685 #undef  TARGET_ASM_FUNCTION_SWITCHED_TEXT_SECTIONS
 686 #define TARGET_ASM_FUNCTION_SWITCHED_TEXT_SECTIONS \
 687         darwin_function_switched_text_sections
 688
 689 #undef  TARGET_ASM_SELECT_RTX_SECTION
 690 #define TARGET_ASM_SELECT_RTX_SECTION machopic_select_rtx_section
 691 #undef  TARGET_ASM_UNIQUE_SECTION
 692 #define TARGET_ASM_UNIQUE_SECTION darwin_unique_section
 693 #undef  TARGET_ASM_FUNCTION_RODATA_SECTION
 694 #define TARGET_ASM_FUNCTION_RODATA_SECTION default_no_function_rodata_section
 695 #undef  TARGET_ASM_RELOC_RW_MASK
 696 #define TARGET_ASM_RELOC_RW_MASK machopic_reloc_rw_mask
 697
 698
 699 #define ASM_DECLARE_UNRESOLVED_REFERENCE(FILE,NAME)                     \
 700     do {                                                                \
 701          if (FILE) {                                                    \
 702            if (MACHOPIC_INDIRECT)                                       \
 703              fprintf (FILE, "\t.lazy_reference ");                      \
 704            else                                                         \
 705              fprintf (FILE, "\t.reference ");                           \
 706            assemble_name (FILE, NAME);                                  \
 707            fprintf (FILE, "\n");                                        \
 708          }                                                              \
 709        } while (0)
 710
 711 #define ASM_DECLARE_CLASS_REFERENCE(FILE,NAME)                          \
 712     do {                                                                \
 713          if (FILE) {                                                    \
 714            fprintf (FILE, "\t");                                        \
 715            assemble_name (FILE, NAME);                                  \
 716            fprintf (FILE, "=0\n");                                      \
 717            (*targetm.asm_out.globalize_label) (FILE, NAME);             \
 718          }                                                              \
 719        } while (0)
 720
 721 /* Globalizing directive for a label.  */
 722 #define GLOBAL_ASM_OP "\t.globl "
 723 #define TARGET_ASM_GLOBALIZE_LABEL darwin_globalize_label
 724
 725 /* Emit an assembler directive to set visibility for a symbol.  Used
 726    to support visibility attribute and Darwin's private extern
 727    feature.  */
 728 #undef TARGET_ASM_ASSEMBLE_VISIBILITY
 729 #define TARGET_ASM_ASSEMBLE_VISIBILITY darwin_assemble_visibility
 730
 731 /* Extra attributes for Darwin.  */
 732 #define SUBTARGET_ATTRIBUTE_TABLE                                            \
 733   /* { name, min_len, max_len, decl_req, type_req, fn_type_req, handler,     \
 734        affects_type_identity } */                                                    \
 735   { "apple_kext_compatibility", 0, 0, false, true, false,                    \
 736     darwin_handle_kext_attribute, false },                                   \
 737   { "weak_import", 0, 0, true, false, false,                                 \
 738     darwin_handle_weak_import_attribute, false }
 739
 740 #undef ASM_GENERATE_INTERNAL_LABEL
 741 #define ASM_GENERATE_INTERNAL_LABEL(LABEL,PREFIX,NUM)   \
 742   sprintf (LABEL, "*%s%ld", PREFIX, (long)(NUM))
 743
 744 #undef TARGET_ASM_MARK_DECL_PRESERVED
 745 #define TARGET_ASM_MARK_DECL_PRESERVED darwin_mark_decl_preserved
 746
 747 /* Set on a symbol with SYMBOL_FLAG_FUNCTION or
 748    MACHO_SYMBOL_FLAG_VARIABLE to indicate that the function or
 749    variable has been defined in this translation unit.
 750    When porting Mach-O to new architectures you need to make
 751    sure these aren't clobbered by the backend.  */
 752
 753 #define MACHO_SYMBOL_FLAG_VARIABLE (SYMBOL_FLAG_MACH_DEP)
 754 #define MACHO_SYMBOL_FLAG_DEFINED ((SYMBOL_FLAG_MACH_DEP) << 1)
 755
 756 /* Set on a symbol to indicate when fix-and-continue style code
 757    generation is being used and the symbol refers to a static symbol
 758    that should be rebound from new instances of a translation unit to
 759    the original instance of the data.  */
 760
 761 #define MACHO_SYMBOL_STATIC ((SYMBOL_FLAG_MACH_DEP) << 2)
 762
 763 /* Symbolic names for various things we might know about a symbol.  */
 764
 765 enum machopic_addr_class {
 766   MACHOPIC_UNDEFINED,
 767   MACHOPIC_DEFINED_DATA,
 768   MACHOPIC_UNDEFINED_DATA,
 769   MACHOPIC_DEFINED_FUNCTION,
 770   MACHOPIC_UNDEFINED_FUNCTION
 771 };
 772
 773 /* Macros defining the various PIC cases.  */
 774
 775 #undef  MACHO_DYNAMIC_NO_PIC_P
 776 #define MACHO_DYNAMIC_NO_PIC_P  (TARGET_MACHO_DYNAMIC_NO_PIC)
 777 #undef  MACHOPIC_INDIRECT
 778 #define MACHOPIC_INDIRECT       (flag_pic || MACHO_DYNAMIC_NO_PIC_P)
 779 #define MACHOPIC_JUST_INDIRECT  (MACHO_DYNAMIC_NO_PIC_P)
 780 #undef  MACHOPIC_PURE
 781 #define MACHOPIC_PURE           (flag_pic && ! MACHO_DYNAMIC_NO_PIC_P)
 782
 783 #undef TARGET_ENCODE_SECTION_INFO
 784 #define TARGET_ENCODE_SECTION_INFO  darwin_encode_section_info
 785 #undef TARGET_STRIP_NAME_ENCODING
 786 #define TARGET_STRIP_NAME_ENCODING  default_strip_name_encoding
 787
 788 #define GEN_BINDER_NAME_FOR_STUB(BUF,STUB,STUB_LENGTH)          \
 789   do {                                                          \
 790     const char *const stub_ = (STUB);                           \
 791     char *buffer_ = (BUF);                                      \
 792     strcpy (buffer_, stub_);                                    \
 793     if (stub_[0] == '"')                                        \
 794       {                                                         \
 795         strcpy (buffer_ + (STUB_LENGTH) - 1, "_binder\"");      \
 796       }                                                         \
 797     else                                                        \
 798       {                                                         \
 799         strcpy (buffer_ + (STUB_LENGTH), "_binder");            \
 800       }                                                         \
 801   } while (0)
 802
 803 #define GEN_SYMBOL_NAME_FOR_SYMBOL(BUF,SYMBOL,SYMBOL_LENGTH)    \
 804   do {                                                          \
 805     const char *const symbol_ = (SYMBOL);                       \
 806     char *buffer_ = (BUF);                                      \
 807     if (name_needs_quotes (symbol_) && symbol_[0] != '"')       \
 808       {                                                         \
 809           sprintf (buffer_, "\"%s\"", symbol_);                 \
 810       }                                                         \
 811     else                                                        \
 812       {                                                         \
 813         strcpy (buffer_, symbol_);                              \
 814       }                                                         \
 815   } while (0)
 816
 817 /* Given a symbol name string, create the lazy pointer version
 818    of the symbol name.  */
 819
 820 #define GEN_LAZY_PTR_NAME_FOR_SYMBOL(BUF,SYMBOL,SYMBOL_LENGTH)  \
 821   do {                                                          \
 822     const char *symbol_ = (SYMBOL);                             \
 823     char *buffer_ = (BUF);                                      \
 824     if (symbol_[0] == '"')                                      \
 825       {                                                         \
 826         strcpy (buffer_, "\"L");                                \
 827         strcpy (buffer_ + 2, symbol_ + 1);                      \
 828         strcpy (buffer_ + (SYMBOL_LENGTH), "$lazy_ptr\"");      \
 829       }                                                         \
 830     else if (name_needs_quotes (symbol_))                       \
 831       {                                                         \
 832         strcpy (buffer_, "\"L");                                \
 833         strcpy (buffer_ + 2, symbol_);                          \
 834         strcpy (buffer_ + (SYMBOL_LENGTH) + 2, "$lazy_ptr\"");  \
 835       }                                                         \
 836     else                                                        \
 837       {                                                         \
 838         strcpy (buffer_, "L");                                  \
 839         strcpy (buffer_ + 1, symbol_);                          \
 840         strcpy (buffer_ + (SYMBOL_LENGTH) + 1, "$lazy_ptr");    \
 841       }                                                         \
 842   } while (0)
 843
 844 #define EH_FRAME_SECTION_NAME   "__TEXT"
 845 #define EH_FRAME_SECTION_ATTR ",coalesced,no_toc+strip_static_syms+live_support"
 846
 847 /* Java runtime class list.  */
 848 #define JCR_SECTION_NAME "__DATA,jcr,regular,no_dead_strip"
 849
 850 #undef ASM_PREFERRED_EH_DATA_FORMAT
 851 #define ASM_PREFERRED_EH_DATA_FORMAT(CODE,GLOBAL)  \
 852   (((CODE) == 2 && (GLOBAL) == 1) \
 853    ? (DW_EH_PE_pcrel | DW_EH_PE_indirect | DW_EH_PE_sdata4) : \
 854      ((CODE) == 1 || (GLOBAL) == 0) ? DW_EH_PE_pcrel : DW_EH_PE_absptr)
 855
 856 #define ASM_OUTPUT_DWARF_DELTA(FILE,SIZE,LABEL1,LABEL2)  \
 857   darwin_asm_output_dwarf_delta (FILE, SIZE, LABEL1, LABEL2)
 858
 859 #define ASM_OUTPUT_DWARF_OFFSET(FILE,SIZE,LABEL,BASE)  \
 860   darwin_asm_output_dwarf_offset (FILE, SIZE, LABEL, BASE)
 861
 862 #define ASM_MAYBE_OUTPUT_ENCODED_ADDR_RTX(ASM_OUT_FILE, ENCODING, SIZE, ADDR, DONE)     \
 863       if (ENCODING == ASM_PREFERRED_EH_DATA_FORMAT (2, 1)) {                            \
 864         darwin_non_lazy_pcrel (ASM_OUT_FILE, ADDR);                                     \
 865         goto DONE;                                                                      \
 866       }
 867
 868 /* Experimentally, putting jump tables in text is faster on SPEC.
 869    Also this is needed for correctness for coalesced functions.  */
 870
 871 #ifndef JUMP_TABLES_IN_TEXT_SECTION
 872 #define JUMP_TABLES_IN_TEXT_SECTION 1
 873 #endif
 874
 875 #define TARGET_TERMINATE_DW2_EH_FRAME_INFO false
 876
 877 #define TARGET_ASM_INIT_SECTIONS darwin_init_sections
 878 #undef TARGET_ASM_NAMED_SECTION
 879 #define TARGET_ASM_NAMED_SECTION darwin_asm_named_section
 880
 881 #define DARWIN_REGISTER_TARGET_PRAGMAS()                        \
 882   do {                                                          \
 883     if (!flag_preprocess_only)                                  \
 884       cpp_register_pragma (parse_in, NULL, "mark",              \
 885                            darwin_pragma_ignore, false);        \
 886     c_register_pragma (0, "options", darwin_pragma_options);    \
 887     c_register_pragma (0, "segment", darwin_pragma_ignore);     \
 888     c_register_pragma (0, "unused", darwin_pragma_unused);      \
 889     c_register_pragma (0, "ms_struct", darwin_pragma_ms_struct); \
 890   } while (0)
 891
 892 #undef ASM_APP_ON
 893 #define ASM_APP_ON ""
 894 #undef ASM_APP_OFF
 895 #define ASM_APP_OFF ""
 896
 897 void darwin_register_frameworks (const char *, const char *, int);
 898 void darwin_register_objc_includes (const char *, const char *, int);
 899 #define TARGET_EXTRA_PRE_INCLUDES darwin_register_objc_includes
 900 #define TARGET_EXTRA_INCLUDES darwin_register_frameworks
 901
 902 void add_framework_path (char *);
 903 #define TARGET_OPTF add_framework_path
 904
 905 #define TARGET_POSIX_IO
 906
 907 /* All new versions of Darwin have C99 functions.  */
 908
 909 #define TARGET_C99_FUNCTIONS 1
 910
 911 #define WINT_TYPE "int"
 912
 913 /* Every program on darwin links against libSystem which contains the pthread
 914    routines, so there's no need to explicitly call out when doing threaded
 915    work.  */
 916
 917 #undef GOMP_SELF_SPECS
 918 #define GOMP_SELF_SPECS ""
 919
 920 /* Darwin disables section anchors by default.
 921    They should be enabled per arch where support exists in that arch.  */
 922 #define TARGET_ASM_OUTPUT_ANCHOR NULL
 923 #define DARWIN_SECTION_ANCHORS 0
 924
 925 #define HAVE_ENABLE_EXECUTE_STACK
 926
 927 /* For Apple KEXTs, we make the constructors return this to match gcc
 928    2.95.  */
 929 #define TARGET_CXX_CDTOR_RETURNS_THIS (darwin_kextabi_p)
 930 #define TARGET_KEXTABI flag_apple_kext
 931
 932 /* We have target-specific builtins.  */
 933 #define TARGET_FOLD_BUILTIN darwin_fold_builtin
 934
 935 #define TARGET_N_FORMAT_TYPES 1
 936 #define TARGET_FORMAT_TYPES darwin_additional_format_types
 937
 938 #ifndef USED_FOR_TARGET
 939 extern void darwin_driver_init (unsigned int *,struct cl_decoded_option **);
 940 #define GCC_DRIVER_HOST_INITIALIZATION \
 941   darwin_driver_init (&decoded_options_count, &decoded_options)
 942 #endif
 943
 944 /* The Apple assembler and linker do not support constructor priorities.  */
 945 #undef SUPPORTS_INIT_PRIORITY
 946 #define SUPPORTS_INIT_PRIORITY 0
 947
 948 /* When building cross-compilers (and native crosses) we shall default to
 949    providing an osx-version-min of this unless overridden by the User.  */
 950 #define DEF_MIN_OSX_VERSION "10.4"
 951
 952 #endif /* CONFIG_DARWIN_H */