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     %{flto*:%<fcompare-debug*} \
 189     %{flto*} \
 190     %l %X %{s} %{t} %{Z} %{u*} \
 191     %{e*} %{r} \
 192     %{o*}%{!o:-o a.out} \
 193     %{!nostdlib:%{!nostartfiles:%S}} \
 194     %{L*} %(link_libgcc) %o %{fprofile-arcs|fprofile-generate*|coverage:-lgcov} \
 195     %{fopenmp|ftree-parallelize-loops=*: \
 196       %{static|static-libgcc|static-libstdc++|static-libgfortran: libgomp.a%s; : -lgomp } } \
 197     %{!nostdlib:%{!nodefaultlibs:\
 198       %(link_ssp) %(link_gcc_c_sequence)\
 199     }}\
 200     %{!nostdlib:%{!nostartfiles:%E}} %{T*} %{F*} }}}}}}}"
 201
 202 #define DSYMUTIL "\ndsymutil"
 203
 204 #define DSYMUTIL_SPEC \
 205    "%{!fdump=*:%{!fsyntax-only:%{!c:%{!M:%{!MM:%{!E:%{!S:\
 206     %{v} \
 207     %{gdwarf-2:%{!gstabs*:%{!g0: -idsym}}}\
 208     %{.c|.cc|.C|.cpp|.cp|.c++|.cxx|.CPP|.m|.mm: \
 209     %{gdwarf-2:%{!gstabs*:%{!g0: -dsym}}}}}}}}}}}"
 210
 211 #define LINK_COMMAND_SPEC LINK_COMMAND_SPEC_A DSYMUTIL_SPEC
 212
 213 /* Tell collect2 to run dsymutil for us as necessary.  */
 214 #define COLLECT_RUN_DSYMUTIL 1
 215
 216 /* We only want one instance of %G, since libSystem (Darwin's -lc) does not depend
 217    on libgcc.  */
 218 #undef  LINK_GCC_C_SEQUENCE_SPEC
 219 #define LINK_GCC_C_SEQUENCE_SPEC "%G %L"
 220
 221 #ifdef TARGET_SYSTEM_ROOT
 222 #define LINK_SYSROOT_SPEC \
 223   "%{isysroot*:-syslibroot %*;:-syslibroot " TARGET_SYSTEM_ROOT "}"
 224 #else
 225 #define LINK_SYSROOT_SPEC "%{isysroot*:-syslibroot %*}"
 226 #endif
 227
 228 /* Please keep the random linker options in alphabetical order (modulo
 229    'Z' and 'no' prefixes). Note that options taking arguments may appear
 230    multiple times on a command line with different arguments each time,
 231    so put a * after their names so all of them get passed.  */
 232 #define LINK_SPEC  \
 233   "%{static}%{!static:-dynamic} \
 234    %:remove-outfile(-ldl) \
 235    %:remove-outfile(-lm) \
 236    %:remove-outfile(-lpthread) \
 237    %{fgnu-runtime: %{static|static-libgcc: \
 238                      %:replace-outfile(-lobjc libobjc-gnu.a%s); \
 239                     :%:replace-outfile(-lobjc -lobjc-gnu ) } }\
 240    %{static|static-libgcc|static-libgfortran:%:replace-outfile(-lgfortran libgfortran.a%s)}\
 241    %{static|static-libgcc|static-libstdc++|static-libgfortran:%:replace-outfile(-lgomp libgomp.a%s)}\
 242    %{static|static-libgcc|static-libstdc++:%:replace-outfile(-lstdc++ libstdc++.a%s)}\
 243    %{!Zdynamiclib: \
 244      %{Zforce_cpusubtype_ALL:-arch %(darwin_arch) -force_cpusubtype_ALL} \
 245      %{!Zforce_cpusubtype_ALL:-arch %(darwin_subarch)} \
 246      %{Zbundle:-bundle} \
 247      %{Zbundle_loader*:-bundle_loader %*} \
 248      %{client_name*} \
 249      %{compatibility_version*:%e-compatibility_version only allowed with -dynamiclib\
 250 } \
 251      %{current_version*:%e-current_version only allowed with -dynamiclib} \
 252      %{Zforce_flat_namespace:-force_flat_namespace} \
 253      %{Zinstall_name*:%e-install_name only allowed with -dynamiclib} \
 254      %{keep_private_externs} \
 255      %{private_bundle} \
 256     } \
 257    %{Zdynamiclib: -dylib \
 258      %{Zbundle:%e-bundle not allowed with -dynamiclib} \
 259      %{Zbundle_loader*:%e-bundle_loader not allowed with -dynamiclib} \
 260      %{client_name*:%e-client_name not allowed with -dynamiclib} \
 261      %{compatibility_version*:-dylib_compatibility_version %*} \
 262      %{current_version*:-dylib_current_version %*} \
 263      %{Zforce_cpusubtype_ALL:-arch %(darwin_arch)} \
 264      %{!Zforce_cpusubtype_ALL: -arch %(darwin_subarch)} \
 265      %{Zforce_flat_namespace:%e-force_flat_namespace not allowed with -dynamiclib} \
 266      %{Zinstall_name*:-dylib_install_name %*} \
 267      %{keep_private_externs:%e-keep_private_externs not allowed with -dynamiclib} \
 268      %{private_bundle:%e-private_bundle not allowed with -dynamiclib} \
 269     } \
 270    %{Zall_load:-all_load} \
 271    %{Zallowable_client*:-allowable_client %*} \
 272    %{Zbind_at_load:-bind_at_load} \
 273    %{Zarch_errors_fatal:-arch_errors_fatal} \
 274    %{Zdead_strip:-dead_strip} \
 275    %{Zno_dead_strip_inits_and_terms:-no_dead_strip_inits_and_terms} \
 276    %{Zdylib_file*:-dylib_file %*} \
 277    %{Zdynamic:-dynamic}\
 278    %{Zexported_symbols_list*:-exported_symbols_list %*} \
 279    %{Zflat_namespace:-flat_namespace} \
 280    %{headerpad_max_install_names} \
 281    %{Zimage_base*:-image_base %*} \
 282    %{Zinit*:-init %*} \
 283    %{!mmacosx-version-min=*:-macosx_version_min %(darwin_minversion)} \
 284    %{mmacosx-version-min=*:-macosx_version_min %*} \
 285    %{nomultidefs} \
 286    %{Zmulti_module:-multi_module} %{Zsingle_module:-single_module} \
 287    %{Zmultiply_defined*:-multiply_defined %*} \
 288    %{!Zmultiply_defined*:%{shared-libgcc: \
 289      %:version-compare(< 10.5 mmacosx-version-min= -multiply_defined) \
 290      %:version-compare(< 10.5 mmacosx-version-min= suppress)}} \
 291    %{Zmultiplydefinedunused*:-multiply_defined_unused %*} \
 292    %{fpie:-pie} \
 293    %{prebind} %{noprebind} %{nofixprebinding} %{prebind_all_twolevel_modules} \
 294    %{read_only_relocs} \
 295    %{sectcreate*} %{sectorder*} %{seg1addr*} %{segprot*} \
 296    %{Zsegaddr*:-segaddr %*} \
 297    %{Zsegs_read_only_addr*:-segs_read_only_addr %*} \
 298    %{Zsegs_read_write_addr*:-segs_read_write_addr %*} \
 299    %{Zseg_addr_table*: -seg_addr_table %*} \
 300    %{Zfn_seg_addr_table_filename*:-seg_addr_table_filename %*} \
 301    %{sub_library*} %{sub_umbrella*} \
 302    " LINK_SYSROOT_SPEC " \
 303    %{twolevel_namespace} %{twolevel_namespace_hints} \
 304    %{Zumbrella*: -umbrella %*} \
 305    %{undefined*} \
 306    %{Zunexported_symbols_list*:-unexported_symbols_list %*} \
 307    %{Zweak_reference_mismatches*:-weak_reference_mismatches %*} \
 308    %{!Zweak_reference_mismatches*:-weak_reference_mismatches non-weak} \
 309    %{X} \
 310    %{y*} \
 311    %{w} \
 312    %{pagezero_size*} %{segs_read_*} %{seglinkedit} %{noseglinkedit}  \
 313    %{sectalign*} %{sectobjectsymbols*} %{segcreate*} %{whyload} \
 314    %{whatsloaded} %{dylinker_install_name*} \
 315    %{dylinker} %{Mach} "
 316
 317
 318 /* Machine dependent libraries.  */
 319
 320 #define LIB_SPEC "%{!static:-lSystem}"
 321
 322 /* Support -mmacosx-version-min by supplying different (stub) libgcc_s.dylib
 323    libraries to link against, and by not linking against libgcc_s on
 324    earlier-than-10.3.9.
 325
 326    Note that by default, -lgcc_eh is not linked against!  This is
 327    because in a future version of Darwin the EH frame information may
 328    be in a new format, or the fallback routine might be changed; if
 329    you want to explicitly link against the static version of those
 330    routines, because you know you don't need to unwind through system
 331    libraries, you need to explicitly say -static-libgcc.
 332
 333    If it is linked against, it has to be before -lgcc, because it may
 334    need symbols from -lgcc.  */
 335 #undef REAL_LIBGCC_SPEC
 336 #define REAL_LIBGCC_SPEC                                                   \
 337    "%{static-libgcc|static: -lgcc_eh -lgcc;                                \
 338       shared-libgcc|fexceptions|fgnu-runtime:                              \
 339        %:version-compare(!> 10.5 mmacosx-version-min= -lgcc_s.10.4)        \
 340        %:version-compare(>< 10.5 10.6 mmacosx-version-min= -lgcc_s.10.5)   \
 341        %:version-compare(!> 10.5 mmacosx-version-min= -lgcc_ext.10.4)      \
 342        %:version-compare(>= 10.5 mmacosx-version-min= -lgcc_ext.10.5)      \
 343        -lgcc ;                                                             \
 344       :%:version-compare(>< 10.3.9 10.5 mmacosx-version-min= -lgcc_s.10.4) \
 345        %:version-compare(>< 10.5 10.6 mmacosx-version-min= -lgcc_s.10.5)   \
 346        %:version-compare(!> 10.5 mmacosx-version-min= -lgcc_ext.10.4)      \
 347        %:version-compare(>= 10.5 mmacosx-version-min= -lgcc_ext.10.5)      \
 348        -lgcc }"
 349
 350 /* We specify crt0.o as -lcrt0.o so that ld will search the library path.
 351
 352    crt3.o provides __cxa_atexit on systems that don't have it.  Since
 353    it's only used with C++, which requires passing -shared-libgcc, key
 354    off that to avoid unnecessarily adding a destructor to every
 355    powerpc program built.  */
 356
 357 #undef  STARTFILE_SPEC
 358 #define STARTFILE_SPEC                                                      \
 359   "%{Zdynamiclib: %(darwin_dylib1) }                                        \
 360    %{!Zdynamiclib:%{Zbundle:%{!static:-lbundle1.o}}                         \
 361      %{!Zbundle:%{pg:%{static:-lgcrt0.o}                                    \
 362                      %{!static:%{object:-lgcrt0.o}                          \
 363                                %{!object:%{preload:-lgcrt0.o}               \
 364                                  %{!preload:-lgcrt1.o %(darwin_crt2)}}}}    \
 365                 %{!pg:%{static:-lcrt0.o}                                    \
 366                       %{!static:%{object:-lcrt0.o}                          \
 367                                 %{!object:%{preload:-lcrt0.o}               \
 368                                   %{!preload: %(darwin_crt1)                \
 369                                               %(darwin_crt2)}}}}}}          \
 370   %{shared-libgcc:%:version-compare(< 10.5 mmacosx-version-min= crt3.o%s)}"
 371
 372 /* The native Darwin linker doesn't necessarily place files in the order
 373    that they're specified on the link line.  Thus, it is pointless
 374    to put anything in ENDFILE_SPEC.  */
 375 /* #define ENDFILE_SPEC "" */
 376
 377 #define DARWIN_EXTRA_SPECS                                              \
 378   { "darwin_crt1", DARWIN_CRT1_SPEC },                                  \
 379   { "darwin_dylib1", DARWIN_DYLIB1_SPEC },                              \
 380   { "darwin_minversion", DARWIN_MINVERSION_SPEC },
 381
 382 #define DARWIN_DYLIB1_SPEC                                              \
 383   "%:version-compare(!> 10.5 mmacosx-version-min= -ldylib1.o)           \
 384    %:version-compare(>= 10.5 mmacosx-version-min= -ldylib1.10.5.o)"
 385
 386 #define DARWIN_CRT1_SPEC                                                \
 387   "%:version-compare(!> 10.5 mmacosx-version-min= -lcrt1.o)             \
 388    %:version-compare(>= 10.5 mmacosx-version-min= -lcrt1.10.5.o)"
 389
 390 /* Default Darwin ASM_SPEC, very simple.  */
 391 #define ASM_SPEC "-arch %(darwin_arch) \
 392   %{Zforce_cpusubtype_ALL:-force_cpusubtype_ALL} \
 393   %{static}"
 394
 395 /* We still allow output of STABS.  */
 396
 397 #define DBX_DEBUGGING_INFO 1
 398
 399 #define DWARF2_DEBUGGING_INFO 1
 400 #define PREFERRED_DEBUGGING_TYPE DBX_DEBUG
 401
 402 #define DEBUG_FRAME_SECTION     "__DWARF,__debug_frame,regular,debug"
 403 #define DEBUG_INFO_SECTION      "__DWARF,__debug_info,regular,debug"
 404 #define DEBUG_ABBREV_SECTION    "__DWARF,__debug_abbrev,regular,debug"
 405 #define DEBUG_ARANGES_SECTION   "__DWARF,__debug_aranges,regular,debug"
 406 #define DEBUG_MACINFO_SECTION   "__DWARF,__debug_macinfo,regular,debug"
 407 #define DEBUG_LINE_SECTION      "__DWARF,__debug_line,regular,debug"
 408 #define DEBUG_LOC_SECTION       "__DWARF,__debug_loc,regular,debug"
 409 #define DEBUG_PUBNAMES_SECTION  "__DWARF,__debug_pubnames,regular,debug"
 410 #define DEBUG_PUBTYPES_SECTION  "__DWARF,__debug_pubtypes,regular,debug"
 411 #define DEBUG_STR_SECTION       "__DWARF,__debug_str,regular,debug"
 412 #define DEBUG_RANGES_SECTION    "__DWARF,__debug_ranges,regular,debug"
 413
 414 #define TARGET_WANT_DEBUG_PUB_SECTIONS true
 415
 416 /* When generating stabs debugging, use N_BINCL entries.  */
 417
 418 #define DBX_USE_BINCL
 419
 420 /* There is no limit to the length of stabs strings.  */
 421
 422 #define DBX_CONTIN_LENGTH 0
 423
 424 /* gdb needs a null N_SO at the end of each file for scattered loading.  */
 425
 426 #define DBX_OUTPUT_NULL_N_SO_AT_MAIN_SOURCE_FILE_END
 427
 428 /* GCC's definition of 'one_only' is the same as its definition of 'weak'.  */
 429 #define MAKE_DECL_ONE_ONLY(DECL) (DECL_WEAK (DECL) = 1)
 430
 431 /* Mach-O supports 'weak imports', and 'weak definitions' in coalesced
 432    sections.  machopic_select_section ensures that weak variables go in
 433    coalesced sections.  Weak aliases (or any other kind of aliases) are
 434    not supported.  Weak symbols that aren't visible outside the .s file
 435    are not supported.  */
 436 #define ASM_WEAKEN_DECL(FILE, DECL, NAME, ALIAS)                        \
 437   do {                                                                  \
 438     if (ALIAS)                                                          \
 439       {                                                                 \
 440         warning (0, "alias definitions not supported in Mach-O; ignored");      \
 441         break;                                                          \
 442       }                                                                 \
 443                                                                         \
 444     if (! DECL_EXTERNAL (DECL) && TREE_PUBLIC (DECL))                   \
 445       targetm.asm_out.globalize_label (FILE, NAME);                     \
 446     if (DECL_EXTERNAL (DECL))                                           \
 447       fputs ("\t.weak_reference ", FILE);                               \
 448     else if (lookup_attribute ("weak_import", DECL_ATTRIBUTES (DECL)))  \
 449       break;                                                            \
 450     else if (TREE_PUBLIC (DECL))                                        \
 451       fputs ("\t.weak_definition ", FILE);                              \
 452     else                                                                \
 453       break;                                                            \
 454     assemble_name (FILE, NAME);                                         \
 455     fputc ('\n', FILE);                                                 \
 456   } while (0)
 457
 458 /* Darwin has the pthread routines in libSystem, which every program
 459    links to, so there's no need for weak-ness for that.  */
 460 #define GTHREAD_USE_WEAK 0
 461
 462 /* The Darwin linker imposes two limitations on common symbols: they
 463    can't have hidden visibility, and they can't appear in dylibs.  As
 464    a consequence, we should never use common symbols to represent
 465    vague linkage. */
 466 #undef USE_COMMON_FOR_ONE_ONLY
 467 #define USE_COMMON_FOR_ONE_ONLY 0
 468
 469 /* The Darwin linker doesn't want coalesced symbols to appear in
 470    a static archive's table of contents. */
 471 #undef TARGET_WEAK_NOT_IN_ARCHIVE_TOC
 472 #define TARGET_WEAK_NOT_IN_ARCHIVE_TOC 1
 473
 474 /* On Darwin, we don't (at the time of writing) have linkonce sections
 475    with names, so it's safe to make the class data not comdat.  */
 476 #define TARGET_CXX_CLASS_DATA_ALWAYS_COMDAT hook_bool_void_false
 477
 478 /* For efficiency, on Darwin the RTTI information that is always
 479    emitted in the standard C++ library should not be COMDAT.  */
 480 #define TARGET_CXX_LIBRARY_RTTI_COMDAT hook_bool_void_false
 481
 482 /* We make exception information linkonce. */
 483 #undef TARGET_USES_WEAK_UNWIND_INFO
 484 #define TARGET_USES_WEAK_UNWIND_INFO 1
 485
 486 /* We need to use a nonlocal label for the start of an EH frame: the
 487    Darwin linker requires that a coalesced section start with a label.
 488    Unfortunately, it also requires that 'debug' sections don't contain
 489    labels.  */
 490 #undef FRAME_BEGIN_LABEL
 491 #define FRAME_BEGIN_LABEL (for_eh ? "EH_frame" : "Lframe")
 492
 493 /* Emit a label for the FDE corresponding to DECL.  EMPTY means
 494    emit a label for an empty FDE. */
 495 #define TARGET_ASM_EMIT_UNWIND_LABEL darwin_emit_unwind_label
 496
 497 /* Emit a label to separate the exception table.  */
 498 #define TARGET_ASM_EMIT_EXCEPT_TABLE_LABEL darwin_emit_except_table_label
 499
 500 /* Our profiling scheme doesn't LP labels and counter words.  */
 501
 502 #define NO_PROFILE_COUNTERS     1
 503
 504 #undef  INIT_SECTION_ASM_OP
 505 #define INIT_SECTION_ASM_OP
 506
 507 #undef  INVOKE__main
 508
 509 #define TARGET_ASM_CONSTRUCTOR  machopic_asm_out_constructor
 510 #define TARGET_ASM_DESTRUCTOR   machopic_asm_out_destructor
 511
 512 /* Always prefix with an underscore.  */
 513
 514 #define USER_LABEL_PREFIX "_"
 515
 516 /* A dummy symbol that will be replaced with the function base name.  */
 517 #define MACHOPIC_FUNCTION_BASE_NAME "<pic base>"
 518
 519 /* Don't output a .file directive.  That is only used by the assembler for
 520    error reporting.  */
 521 #undef  TARGET_ASM_FILE_START_FILE_DIRECTIVE
 522 #define TARGET_ASM_FILE_START_FILE_DIRECTIVE false
 523
 524 #undef  TARGET_ASM_FILE_END
 525 #define TARGET_ASM_FILE_END darwin_file_end
 526
 527 /* Because Mach-O relocations have a counter from 1 to 255 for the
 528    section number they apply to, it is necessary to output all
 529    normal sections before the LTO sections, to make sure that the
 530    sections that may have relocations always have a section number
 531    smaller than 255.  */
 532 #undef  TARGET_ASM_LTO_START
 533 #define TARGET_ASM_LTO_START darwin_asm_lto_start
 534 #undef  TARGET_ASM_LTO_END
 535 #define TARGET_ASM_LTO_END darwin_asm_lto_end
 536
 537 #define ASM_OUTPUT_SKIP(FILE,SIZE)  \
 538   fprintf (FILE, "\t.space "HOST_WIDE_INT_PRINT_UNSIGNED"\n", SIZE)
 539
 540 /* Give ObjC methods pretty symbol names.  */
 541
 542 #undef  OBJC_GEN_METHOD_LABEL
 543 #define OBJC_GEN_METHOD_LABEL(BUF,IS_INST,CLASS_NAME,CAT_NAME,SEL_NAME,NUM) \
 544   do { if (CAT_NAME)                                                    \
 545          sprintf (BUF, "%c[%s(%s) %s]", (IS_INST) ? '-' : '+',          \
 546                   (CLASS_NAME), (CAT_NAME), (SEL_NAME));                \
 547        else                                                             \
 548          sprintf (BUF, "%c[%s %s]", (IS_INST) ? '-' : '+',              \
 549                   (CLASS_NAME), (SEL_NAME));                            \
 550      } while (0)
 551
 552 #undef ASM_DECLARE_OBJECT_NAME
 553 #define ASM_DECLARE_OBJECT_NAME(FILE, NAME, DECL) \
 554         darwin_asm_declare_object_name ((FILE), (NAME), (DECL))
 555
 556 /* The RTTI data (e.g., __ti4name) is common and public (and static),
 557    but it does need to be referenced via indirect PIC data pointers.
 558    The machopic_define_symbol calls are telling the machopic subsystem
 559    that the name *is* defined in this module, so it doesn't need to
 560    make them indirect.  */
 561
 562 #define ASM_DECLARE_FUNCTION_NAME(FILE, NAME, DECL)                     \
 563   do {                                                                  \
 564     const char *xname = NAME;                                           \
 565     if (GET_CODE (XEXP (DECL_RTL (DECL), 0)) != SYMBOL_REF)             \
 566       xname = IDENTIFIER_POINTER (DECL_NAME (DECL));                    \
 567     if (! DECL_WEAK (DECL)                                              \
 568         && ((TREE_STATIC (DECL)                                         \
 569              && (!DECL_COMMON (DECL) || !TREE_PUBLIC (DECL)))           \
 570             || DECL_INITIAL (DECL)))                                    \
 571         machopic_define_symbol (DECL_RTL (DECL));                       \
 572     if ((TREE_STATIC (DECL)                                             \
 573          && (!DECL_COMMON (DECL) || !TREE_PUBLIC (DECL)))               \
 574         || DECL_INITIAL (DECL))                                         \
 575       (* targetm.encode_section_info) (DECL, DECL_RTL (DECL), false);   \
 576     ASM_OUTPUT_FUNCTION_LABEL (FILE, xname, DECL);                      \
 577   } while (0)
 578
 579 #undef TARGET_ASM_DECLARE_CONSTANT_NAME
 580 #define TARGET_ASM_DECLARE_CONSTANT_NAME darwin_asm_declare_constant_name
 581
 582 /* Wrap new method names in quotes so the assembler doesn't gag.
 583    Make Objective-C internal symbols local and in doing this, we need
 584    to accommodate the name mangling done by c++ on file scope locals.  */
 585
 586 int darwin_label_is_anonymous_local_objc_name (const char *name);
 587
 588 #undef  ASM_OUTPUT_LABELREF
 589 #define ASM_OUTPUT_LABELREF(FILE,NAME)                                       \
 590   do {                                                                       \
 591        const char *xname = (NAME);                                           \
 592        if (! strcmp (xname, MACHOPIC_FUNCTION_BASE_NAME))                    \
 593          machopic_output_function_base_name(FILE);                           \
 594        else if (xname[0] == '&' || xname[0] == '*')                          \
 595          {                                                                   \
 596            int len = strlen (xname);                                         \
 597            if (len > 6 && !strcmp ("$stub", xname + len - 5))                \
 598              machopic_validate_stub_or_non_lazy_ptr (xname);                 \
 599            else if (len > 7 && !strcmp ("$stub\"", xname + len - 6))         \
 600              machopic_validate_stub_or_non_lazy_ptr (xname);                 \
 601            else if (len > 14 && !strcmp ("$non_lazy_ptr", xname + len - 13)) \
 602              machopic_validate_stub_or_non_lazy_ptr (xname);                 \
 603            else if (len > 15 && !strcmp ("$non_lazy_ptr\"", xname + len - 14)) \
 604              machopic_validate_stub_or_non_lazy_ptr (xname);                 \
 605            if (xname[1] != '"' && name_needs_quotes (&xname[1]))             \
 606              fprintf (FILE, "\"%s\"", &xname[1]);                            \
 607            else                                                              \
 608              fputs (&xname[1], FILE);                                        \
 609          }                                                                   \
 610        else if (xname[0] == '+' || xname[0] == '-')                          \
 611          fprintf (FILE, "\"%s\"", xname);                                    \
 612        else if (darwin_label_is_anonymous_local_objc_name (xname))           \
 613          fprintf (FILE, "L%s", xname);                                       \
 614        else if (!strncmp (xname, ".objc_class_name_", 17))                   \
 615          fprintf (FILE, "%s", xname);                                        \
 616        else if (xname[0] != '"' && name_needs_quotes (xname))                \
 617          fprintf (FILE, "\"%s\"", xname);                                    \
 618        else                                                                  \
 619          asm_fprintf (FILE, "%U%s", xname);                                  \
 620   } while (0)
 621
 622 /* Output before executable code.  */
 623 #undef TEXT_SECTION_ASM_OP
 624 #define TEXT_SECTION_ASM_OP "\t.text"
 625
 626 /* Output before writable data.  */
 627
 628 #undef DATA_SECTION_ASM_OP
 629 #define DATA_SECTION_ASM_OP "\t.data"
 630
 631 #undef  ALIGN_ASM_OP
 632 #define ALIGN_ASM_OP            ".align"
 633
 634 #undef  ASM_OUTPUT_ALIGN
 635 #define ASM_OUTPUT_ALIGN(FILE,LOG)      \
 636   if ((LOG) != 0)                       \
 637     fprintf (FILE, "\t%s\t%d\n", ALIGN_ASM_OP, (LOG))
 638
 639 /* The maximum alignment which the object file format can support in
 640    bits.  For Mach-O, this is 2^15 bytes.  */
 641
 642 #undef  MAX_OFILE_ALIGNMENT
 643 #define MAX_OFILE_ALIGNMENT (0x8000 * 8)
 644
 645 #define L2_MAX_OFILE_ALIGNMENT 15
 646
 647 /*  These are the three variants that emit referenced blank space.  */
 648 #define ASM_OUTPUT_ALIGNED_BSS(FILE, DECL, NAME, SIZE, ALIGN)           \
 649         darwin_output_aligned_bss ((FILE), (DECL), (NAME), (SIZE), (ALIGN))
 650
 651 #undef  ASM_OUTPUT_ALIGNED_DECL_LOCAL
 652 #define ASM_OUTPUT_ALIGNED_DECL_LOCAL(FILE, DECL, NAME, SIZE, ALIGN)    \
 653         darwin_asm_output_aligned_decl_local                            \
 654                                   ((FILE), (DECL), (NAME), (SIZE), (ALIGN))
 655
 656 #undef  ASM_OUTPUT_ALIGNED_DECL_COMMON
 657 #define ASM_OUTPUT_ALIGNED_DECL_COMMON(FILE, DECL, NAME, SIZE, ALIGN)   \
 658         darwin_asm_output_aligned_decl_common                           \
 659                                    ((FILE), (DECL), (NAME), (SIZE), (ALIGN))
 660
 661 /* The generic version, archs should over-ride where required.  */
 662 #define MACHOPIC_NL_SYMBOL_PTR_SECTION ".non_lazy_symbol_pointer"
 663
 664 /* Declare the section variables.  */
 665 #ifndef USED_FOR_TARGET
 666 enum darwin_section_enum {
 667 #define DEF_SECTION(NAME, FLAGS, DIRECTIVE, OBJC) NAME,
 668 #include "darwin-sections.def"
 669 #undef DEF_SECTION
 670   NUM_DARWIN_SECTIONS
 671 };
 672 extern GTY(()) section * darwin_sections[NUM_DARWIN_SECTIONS];
 673 #endif
 674
 675 #undef  TARGET_ASM_SELECT_SECTION
 676 #define TARGET_ASM_SELECT_SECTION machopic_select_section
 677
 678 #undef  TARGET_ASM_FUNCTION_SECTION
 679 #define TARGET_ASM_FUNCTION_SECTION darwin_function_section
 680
 681 #undef  TARGET_ASM_FUNCTION_SWITCHED_TEXT_SECTIONS
 682 #define TARGET_ASM_FUNCTION_SWITCHED_TEXT_SECTIONS \
 683         darwin_function_switched_text_sections
 684
 685 #undef  TARGET_ASM_SELECT_RTX_SECTION
 686 #define TARGET_ASM_SELECT_RTX_SECTION machopic_select_rtx_section
 687 #undef  TARGET_ASM_UNIQUE_SECTION
 688 #define TARGET_ASM_UNIQUE_SECTION darwin_unique_section
 689 #undef  TARGET_ASM_FUNCTION_RODATA_SECTION
 690 #define TARGET_ASM_FUNCTION_RODATA_SECTION default_no_function_rodata_section
 691 #undef  TARGET_ASM_RELOC_RW_MASK
 692 #define TARGET_ASM_RELOC_RW_MASK machopic_reloc_rw_mask
 693
 694
 695 #define ASM_DECLARE_UNRESOLVED_REFERENCE(FILE,NAME)                     \
 696     do {                                                                \
 697          if (FILE) {                                                    \
 698            if (MACHOPIC_INDIRECT)                                       \
 699              fprintf (FILE, "\t.lazy_reference ");                      \
 700            else                                                         \
 701              fprintf (FILE, "\t.reference ");                           \
 702            assemble_name (FILE, NAME);                                  \
 703            fprintf (FILE, "\n");                                        \
 704          }                                                              \
 705        } while (0)
 706
 707 #define ASM_DECLARE_CLASS_REFERENCE(FILE,NAME)                          \
 708     do {                                                                \
 709          if (FILE) {                                                    \
 710            fprintf (FILE, "\t");                                        \
 711            assemble_name (FILE, NAME);                                  \
 712            fprintf (FILE, "=0\n");                                      \
 713            (*targetm.asm_out.globalize_label) (FILE, NAME);             \
 714          }                                                              \
 715        } while (0)
 716
 717 /* Globalizing directive for a label.  */
 718 #define GLOBAL_ASM_OP "\t.globl "
 719 #define TARGET_ASM_GLOBALIZE_LABEL darwin_globalize_label
 720
 721 /* Emit an assembler directive to set visibility for a symbol.  Used
 722    to support visibility attribute and Darwin's private extern
 723    feature.  */
 724 #undef TARGET_ASM_ASSEMBLE_VISIBILITY
 725 #define TARGET_ASM_ASSEMBLE_VISIBILITY darwin_assemble_visibility
 726
 727 /* Extra attributes for Darwin.  */
 728 #define SUBTARGET_ATTRIBUTE_TABLE                                            \
 729   /* { name, min_len, max_len, decl_req, type_req, fn_type_req, handler,     \
 730        affects_type_identity } */                                                    \
 731   { "apple_kext_compatibility", 0, 0, false, true, false,                    \
 732     darwin_handle_kext_attribute, false },                                   \
 733   { "weak_import", 0, 0, true, false, false,                                 \
 734     darwin_handle_weak_import_attribute, false }
 735
 736 #undef ASM_GENERATE_INTERNAL_LABEL
 737 #define ASM_GENERATE_INTERNAL_LABEL(LABEL,PREFIX,NUM)   \
 738   sprintf (LABEL, "*%s%ld", PREFIX, (long)(NUM))
 739
 740 #undef TARGET_ASM_MARK_DECL_PRESERVED
 741 #define TARGET_ASM_MARK_DECL_PRESERVED darwin_mark_decl_preserved
 742
 743 /* Set on a symbol with SYMBOL_FLAG_FUNCTION or
 744    MACHO_SYMBOL_FLAG_VARIABLE to indicate that the function or
 745    variable has been defined in this translation unit.
 746    When porting Mach-O to new architectures you need to make
 747    sure these aren't clobbered by the backend.  */
 748
 749 #define MACHO_SYMBOL_FLAG_VARIABLE (SYMBOL_FLAG_MACH_DEP)
 750 #define MACHO_SYMBOL_FLAG_DEFINED ((SYMBOL_FLAG_MACH_DEP) << 1)
 751
 752 /* Set on a symbol to indicate when fix-and-continue style code
 753    generation is being used and the symbol refers to a static symbol
 754    that should be rebound from new instances of a translation unit to
 755    the original instance of the data.  */
 756
 757 #define MACHO_SYMBOL_STATIC ((SYMBOL_FLAG_MACH_DEP) << 2)
 758
 759 /* Symbolic names for various things we might know about a symbol.  */
 760
 761 enum machopic_addr_class {
 762   MACHOPIC_UNDEFINED,
 763   MACHOPIC_DEFINED_DATA,
 764   MACHOPIC_UNDEFINED_DATA,
 765   MACHOPIC_DEFINED_FUNCTION,
 766   MACHOPIC_UNDEFINED_FUNCTION
 767 };
 768
 769 /* Macros defining the various PIC cases.  */
 770
 771 #undef  MACHO_DYNAMIC_NO_PIC_P
 772 #define MACHO_DYNAMIC_NO_PIC_P  (TARGET_MACHO_DYNAMIC_NO_PIC)
 773 #undef  MACHOPIC_INDIRECT
 774 #define MACHOPIC_INDIRECT       (flag_pic || MACHO_DYNAMIC_NO_PIC_P)
 775 #define MACHOPIC_JUST_INDIRECT  (MACHO_DYNAMIC_NO_PIC_P)
 776 #undef  MACHOPIC_PURE
 777 #define MACHOPIC_PURE           (flag_pic && ! MACHO_DYNAMIC_NO_PIC_P)
 778
 779 #undef TARGET_ENCODE_SECTION_INFO
 780 #define TARGET_ENCODE_SECTION_INFO  darwin_encode_section_info
 781 #undef TARGET_STRIP_NAME_ENCODING
 782 #define TARGET_STRIP_NAME_ENCODING  default_strip_name_encoding
 783
 784 #define GEN_BINDER_NAME_FOR_STUB(BUF,STUB,STUB_LENGTH)          \
 785   do {                                                          \
 786     const char *const stub_ = (STUB);                           \
 787     char *buffer_ = (BUF);                                      \
 788     strcpy (buffer_, stub_);                                    \
 789     if (stub_[0] == '"')                                        \
 790       {                                                         \
 791         strcpy (buffer_ + (STUB_LENGTH) - 1, "_binder\"");      \
 792       }                                                         \
 793     else                                                        \
 794       {                                                         \
 795         strcpy (buffer_ + (STUB_LENGTH), "_binder");            \
 796       }                                                         \
 797   } while (0)
 798
 799 #define GEN_SYMBOL_NAME_FOR_SYMBOL(BUF,SYMBOL,SYMBOL_LENGTH)    \
 800   do {                                                          \
 801     const char *const symbol_ = (SYMBOL);                       \
 802     char *buffer_ = (BUF);                                      \
 803     if (name_needs_quotes (symbol_) && symbol_[0] != '"')       \
 804       {                                                         \
 805           sprintf (buffer_, "\"%s\"", symbol_);                 \
 806       }                                                         \
 807     else                                                        \
 808       {                                                         \
 809         strcpy (buffer_, symbol_);                              \
 810       }                                                         \
 811   } while (0)
 812
 813 /* Given a symbol name string, create the lazy pointer version
 814    of the symbol name.  */
 815
 816 #define GEN_LAZY_PTR_NAME_FOR_SYMBOL(BUF,SYMBOL,SYMBOL_LENGTH)  \
 817   do {                                                          \
 818     const char *symbol_ = (SYMBOL);                             \
 819     char *buffer_ = (BUF);                                      \
 820     if (symbol_[0] == '"')                                      \
 821       {                                                         \
 822         strcpy (buffer_, "\"L");                                \
 823         strcpy (buffer_ + 2, symbol_ + 1);                      \
 824         strcpy (buffer_ + (SYMBOL_LENGTH), "$lazy_ptr\"");      \
 825       }                                                         \
 826     else if (name_needs_quotes (symbol_))                       \
 827       {                                                         \
 828         strcpy (buffer_, "\"L");                                \
 829         strcpy (buffer_ + 2, symbol_);                          \
 830         strcpy (buffer_ + (SYMBOL_LENGTH) + 2, "$lazy_ptr\"");  \
 831       }                                                         \
 832     else                                                        \
 833       {                                                         \
 834         strcpy (buffer_, "L");                                  \
 835         strcpy (buffer_ + 1, symbol_);                          \
 836         strcpy (buffer_ + (SYMBOL_LENGTH) + 1, "$lazy_ptr");    \
 837       }                                                         \
 838   } while (0)
 839
 840 #define EH_FRAME_SECTION_NAME   "__TEXT"
 841 #define EH_FRAME_SECTION_ATTR ",coalesced,no_toc+strip_static_syms+live_support"
 842
 843 /* Java runtime class list.  */
 844 #define JCR_SECTION_NAME "__DATA,jcr,regular,no_dead_strip"
 845
 846 #undef ASM_PREFERRED_EH_DATA_FORMAT
 847 #define ASM_PREFERRED_EH_DATA_FORMAT(CODE,GLOBAL)  \
 848   (((CODE) == 2 && (GLOBAL) == 1) \
 849    ? (DW_EH_PE_pcrel | DW_EH_PE_indirect | DW_EH_PE_sdata4) : \
 850      ((CODE) == 1 || (GLOBAL) == 0) ? DW_EH_PE_pcrel : DW_EH_PE_absptr)
 851
 852 #define ASM_OUTPUT_DWARF_DELTA(FILE,SIZE,LABEL1,LABEL2)  \
 853   darwin_asm_output_dwarf_delta (FILE, SIZE, LABEL1, LABEL2)
 854
 855 #define ASM_OUTPUT_DWARF_OFFSET(FILE,SIZE,LABEL,BASE)  \
 856   darwin_asm_output_dwarf_offset (FILE, SIZE, LABEL, BASE)
 857
 858 #define ASM_MAYBE_OUTPUT_ENCODED_ADDR_RTX(ASM_OUT_FILE, ENCODING, SIZE, ADDR, DONE)     \
 859       if (ENCODING == ASM_PREFERRED_EH_DATA_FORMAT (2, 1)) {                            \
 860         darwin_non_lazy_pcrel (ASM_OUT_FILE, ADDR);                                     \
 861         goto DONE;                                                                      \
 862       }
 863
 864 /* Experimentally, putting jump tables in text is faster on SPEC.
 865    Also this is needed for correctness for coalesced functions.  */
 866
 867 #ifndef JUMP_TABLES_IN_TEXT_SECTION
 868 #define JUMP_TABLES_IN_TEXT_SECTION 1
 869 #endif
 870
 871 #define TARGET_TERMINATE_DW2_EH_FRAME_INFO false
 872
 873 #define TARGET_ASM_INIT_SECTIONS darwin_init_sections
 874 #undef TARGET_ASM_NAMED_SECTION
 875 #define TARGET_ASM_NAMED_SECTION darwin_asm_named_section
 876
 877 #define DARWIN_REGISTER_TARGET_PRAGMAS()                        \
 878   do {                                                          \
 879     if (!flag_preprocess_only)                                  \
 880       cpp_register_pragma (parse_in, NULL, "mark",              \
 881                            darwin_pragma_ignore, false);        \
 882     c_register_pragma (0, "options", darwin_pragma_options);    \
 883     c_register_pragma (0, "segment", darwin_pragma_ignore);     \
 884     c_register_pragma (0, "unused", darwin_pragma_unused);      \
 885     c_register_pragma (0, "ms_struct", darwin_pragma_ms_struct); \
 886   } while (0)
 887
 888 #undef ASM_APP_ON
 889 #define ASM_APP_ON ""
 890 #undef ASM_APP_OFF
 891 #define ASM_APP_OFF ""
 892
 893 void darwin_register_frameworks (const char *, const char *, int);
 894 void darwin_register_objc_includes (const char *, const char *, int);
 895 #define TARGET_EXTRA_PRE_INCLUDES darwin_register_objc_includes
 896 #define TARGET_EXTRA_INCLUDES darwin_register_frameworks
 897
 898 void add_framework_path (char *);
 899 #define TARGET_OPTF add_framework_path
 900
 901 #define TARGET_POSIX_IO
 902
 903 /* All new versions of Darwin have C99 functions.  */
 904
 905 #define TARGET_C99_FUNCTIONS 1
 906
 907 #define WINT_TYPE "int"
 908
 909 /* Every program on darwin links against libSystem which contains the pthread
 910    routines, so there's no need to explicitly call out when doing threaded
 911    work.  */
 912
 913 #undef GOMP_SELF_SPECS
 914 #define GOMP_SELF_SPECS ""
 915
 916 /* Darwin disables section anchors by default.
 917    They should be enabled per arch where support exists in that arch.  */
 918 #define TARGET_ASM_OUTPUT_ANCHOR NULL
 919 #define DARWIN_SECTION_ANCHORS 0
 920
 921 /* Attempt to turn on execute permission for the stack.  This may be
 922     used by TARGET_TRAMPOLINE_INIT if the target needs it (that is,
 923     if the target machine can change execute permissions on a page).
 924
 925     There is no way to query the execute permission of the stack, so
 926     we always issue the mprotect() call.
 927
 928     Unfortunately it is not possible to make this namespace-clean.
 929
 930     Also note that no errors should be emitted by this code; it is
 931     considered dangerous for library calls to send messages to
 932     stdout/stderr.  */
 933
 934 #define ENABLE_EXECUTE_STACK                                            \
 935 extern void __enable_execute_stack (void *);                            \
 936 void                                                                    \
 937 __enable_execute_stack (void *addr)                                     \
 938 {                                                                       \
 939    extern int mprotect (void *, size_t, int);                           \
 940    extern int getpagesize (void);                                       \
 941    static int size;                                                     \
 942    static long mask;                                                    \
 943                                                                         \
 944    char *page, *end;                                                    \
 945                                                                         \
 946    if (size == 0)                                                       \
 947      {                                                                  \
 948        size = getpagesize();                                            \
 949        mask = ~((long) size - 1);                                       \
 950      }                                                                  \
 951                                                                         \
 952    page = (char *) (((long) addr) & mask);                              \
 953    end  = (char *) ((((long) (addr + (TARGET_64BIT ? 48 : 40))) & mask) + size); \
 954                                                                         \
 955    /* 7 == PROT_READ | PROT_WRITE | PROT_EXEC */                        \
 956    (void) mprotect (page, end - page, 7);                               \
 957 }
 958
 959 /* For Apple KEXTs, we make the constructors return this to match gcc
 960    2.95.  */
 961 #define TARGET_CXX_CDTOR_RETURNS_THIS (darwin_kextabi_p)
 962 #define TARGET_KEXTABI flag_apple_kext
 963
 964 /* We have target-specific builtins.  */
 965 #define TARGET_FOLD_BUILTIN darwin_fold_builtin
 966
 967 #define TARGET_OBJC_CONSTRUCT_STRING_OBJECT \
 968   darwin_objc_construct_string
 969
 970 #define TARGET_STRING_OBJECT_REF_TYPE_P \
 971   darwin_cfstring_ref_p
 972
 973 #define TARGET_N_FORMAT_TYPES 1
 974 #define TARGET_FORMAT_TYPES darwin_additional_format_types
 975
 976 #define TARGET_CHECK_STRING_OBJECT_FORMAT_ARG \
 977   darwin_check_cfstring_format_arg
 978
 979 #define TARGET_HAS_TARGETCM 1
 980
 981 #ifndef USED_FOR_TARGET
 982 extern void darwin_driver_init (unsigned int *,struct cl_decoded_option **);
 983 #define GCC_DRIVER_HOST_INITIALIZATION \
 984   darwin_driver_init (&decoded_options_count, &decoded_options)
 985 #endif
 986
 987 /* The Apple assembler and linker do not support constructor priorities.  */
 988 #undef SUPPORTS_INIT_PRIORITY
 989 #define SUPPORTS_INIT_PRIORITY 0
 990
 991 #endif /* CONFIG_DARWIN_H */