gcc/config/darwin.h

   1 /* Target definitions for Darwin (Mac OS X) systems.
   2    Copyright (C) 1989, 1990, 1991, 1992, 1993, 2000, 2001, 2002, 2003, 2004,
   3    2005, 2006, 2007, 2008, 2009, 2010
   4    Free Software Foundation, Inc.
   5    Contributed by Apple Computer Inc.
   6
   7 This file is part of GCC.
   8
   9 GCC is free software; you can redistribute it and/or modify
  10 it under the terms of the GNU General Public License as published by
  11 the Free Software Foundation; either version 3, or (at your option)
  12 any later version.
  13
  14 GCC is distributed in the hope that it will be useful,
  15 but WITHOUT ANY WARRANTY; without even the implied warranty of
  16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17 GNU General Public License for more details.
  18
  19 Under Section 7 of GPL version 3, you are granted additional
  20 permissions described in the GCC Runtime Library Exception, version
  21 3.1, as published by the Free Software Foundation.
  22
  23 You should have received a copy of the GNU General Public License and
  24 a copy of the GCC Runtime Library Exception along with this program;
  25 see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
  26 <http://www.gnu.org/licenses/>.  */
  27
  28 #ifndef CONFIG_DARWIN_H
  29 #define CONFIG_DARWIN_H
  30
  31 /* The definitions in this file are common to all processor types
  32    running Darwin, which is the kernel for Mac OS X.  Darwin is
  33    basically a BSD user layer laid over a Mach kernel, then evolved
  34    for many years (at NeXT) in parallel with other Unix systems.  So
  35    while the runtime is a somewhat idiosyncratic Mach-based thing,
  36    other definitions look like they would for a BSD variant.  */
  37
  38 /* Although NeXT ran on many different architectures, as of Jan 2001
  39    the only supported Darwin targets are PowerPC and x86.  */
  40
  41 /* One of Darwin's NeXT legacies is the Mach-O format, which is partly
  42    like a.out and partly like COFF, with additional features like
  43    multi-architecture binary support.  */
  44
  45 #define 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     if (flag_mkernel || flag_apple_kext)                                \
 144       {                                                                 \
 145         if (flag_use_cxa_atexit == 2)                                   \
 146           flag_use_cxa_atexit = 0;                                      \
 147         /* kexts should always be built without the coalesced sections  \
 148            because the kernel loader doesn't grok such sections.  */    \
 149         flag_weak = 0;                                                  \
 150         /* No RTTI in kexts.  */                                        \
 151         flag_rtti = 0;                                                  \
 152       }                                                                 \
 153   } while (0)
 154
 155 /* Machine dependent cpp options.  Don't add more options here, add
 156    them to darwin_cpp_builtins in darwin-c.c.  */
 157
 158 #undef  CPP_SPEC
 159 #define CPP_SPEC "%{static:%{!dynamic:-D__STATIC__}}%{!static:-D__DYNAMIC__}" \
 160         " %{pthread:-D_REENTRANT}"
 161
 162 /* This is mostly a clone of the standard LINK_COMMAND_SPEC, plus
 163    precomp, libtool, and fat build additions.  Also we
 164    don't specify a second %G after %L because libSystem is
 165    self-contained and doesn't need to link against libgcc.a.  */
 166 /* In general, random Darwin linker flags should go into LINK_SPEC
 167    instead of LINK_COMMAND_SPEC.  The command spec is better for
 168    specifying the handling of options understood by generic Unix
 169    linkers, and for positional arguments like libraries.  */
 170
 171 #define LINK_COMMAND_SPEC_A \
 172    "%{!fdump=*:%{!fsyntax-only:%{!c:%{!M:%{!MM:%{!E:%{!S:\
 173     %(linker) %l %X %{d} %{s} %{t} %{Z} %{u*} \
 174     %{A} %{e*} %{m} %{r} \
 175     %{o*}%{!o:-o a.out} \
 176     %{!A:%{!nostdlib:%{!nostartfiles:%S}}} \
 177     %{L*} %(link_libgcc) %o %{fprofile-arcs|fprofile-generate*|coverage:-lgcov} \
 178     %{flto} %{fwhopr} \
 179     %{fopenmp|ftree-parallelize-loops=*: \
 180       %{static|static-libgcc|static-libstdc++|static-libgfortran: libgomp.a%s; : -lgomp } } \
 181     %{!nostdlib:%{!nodefaultlibs: %(link_ssp) %G %L }} \
 182     %{!A:%{!nostdlib:%{!nostartfiles:%E}}} %{T*} %{F*} }}}}}}}\n"
 183
 184 #define DSYMUTIL "dsymutil"
 185
 186 #define DSYMUTIL_SPEC \
 187    "%{!fdump=*:%{!fsyntax-only:%{!c:%{!M:%{!MM:%{!E:%{!S:\
 188     %{.c|.cc|.C|.cpp|.cp|.c++|.cxx|.CPP|.m|.mm: \
 189     %{gdwarf-2:%{!gstabs*:%{!g0: " DSYMUTIL " %{o*:%*}%{!o:a.out}}}}}}}}}}}}"
 190
 191 #define LINK_COMMAND_SPEC LINK_COMMAND_SPEC_A DSYMUTIL_SPEC
 192
 193 #ifdef TARGET_SYSTEM_ROOT
 194 #define LINK_SYSROOT_SPEC \
 195   "%{isysroot*:-syslibroot %*;:-syslibroot " TARGET_SYSTEM_ROOT "}"
 196 #else
 197 #define LINK_SYSROOT_SPEC "%{isysroot*:-syslibroot %*}"
 198 #endif
 199
 200 /* Please keep the random linker options in alphabetical order (modulo
 201    'Z' and 'no' prefixes). Note that options taking arguments may appear
 202    multiple times on a command line with different arguments each time,
 203    so put a * after their names so all of them get passed.  */
 204 #define LINK_SPEC  \
 205   "%{static}%{!static:-dynamic} \
 206    %:remove-outfile(-ldl) \
 207    %:remove-outfile(-lm) \
 208    %:remove-outfile(-lpthread) \
 209    %{fgnu-runtime: %{static|static-libgcc: \
 210                      %:replace-outfile(-lobjc libobjc-gnu.a%s); \
 211                     :%:replace-outfile(-lobjc -lobjc-gnu ) } }\
 212    %{static|static-libgcc|static-libgfortran:%:replace-outfile(-lgfortran libgfortran.a%s)}\
 213    %{static|static-libgcc|static-libstdc++|static-libgfortran:%:replace-outfile(-lgomp libgomp.a%s)}\
 214    %{static|static-libgcc|static-libstdc++:%:replace-outfile(-lstdc++ libstdc++.a%s)}\
 215    %{!Zdynamiclib: \
 216      %{Zforce_cpusubtype_ALL:-arch %(darwin_arch) -force_cpusubtype_ALL} \
 217      %{!Zforce_cpusubtype_ALL:-arch %(darwin_subarch)} \
 218      %{Zbundle:-bundle} \
 219      %{Zbundle_loader*:-bundle_loader %*} \
 220      %{client_name*} \
 221      %{compatibility_version*:%e-compatibility_version only allowed with -dynamiclib\
 222 } \
 223      %{current_version*:%e-current_version only allowed with -dynamiclib} \
 224      %{Zforce_flat_namespace:-force_flat_namespace} \
 225      %{Zinstall_name*:%e-install_name only allowed with -dynamiclib} \
 226      %{keep_private_externs} \
 227      %{private_bundle} \
 228     } \
 229    %{Zdynamiclib: -dylib \
 230      %{Zbundle:%e-bundle not allowed with -dynamiclib} \
 231      %{Zbundle_loader*:%e-bundle_loader not allowed with -dynamiclib} \
 232      %{client_name*:%e-client_name not allowed with -dynamiclib} \
 233      %{compatibility_version*:-dylib_compatibility_version %*} \
 234      %{current_version*:-dylib_current_version %*} \
 235      %{Zforce_cpusubtype_ALL:-arch %(darwin_arch)} \
 236      %{!Zforce_cpusubtype_ALL: -arch %(darwin_subarch)} \
 237      %{Zforce_flat_namespace:%e-force_flat_namespace not allowed with -dynamiclib} \
 238      %{Zinstall_name*:-dylib_install_name %*} \
 239      %{keep_private_externs:%e-keep_private_externs not allowed with -dynamiclib} \
 240      %{private_bundle:%e-private_bundle not allowed with -dynamiclib} \
 241     } \
 242    %{Zall_load:-all_load} \
 243    %{Zallowable_client*:-allowable_client %*} \
 244    %{Zbind_at_load:-bind_at_load} \
 245    %{Zarch_errors_fatal:-arch_errors_fatal} \
 246    %{Zdead_strip:-dead_strip} \
 247    %{Zno_dead_strip_inits_and_terms:-no_dead_strip_inits_and_terms} \
 248    %{Zdylib_file*:-dylib_file %*} \
 249    %{Zdynamic:-dynamic}\
 250    %{Zexported_symbols_list*:-exported_symbols_list %*} \
 251    %{Zflat_namespace:-flat_namespace} \
 252    %{headerpad_max_install_names*} \
 253    %{Zimage_base*:-image_base %*} \
 254    %{Zinit*:-init %*} \
 255    %{!mmacosx-version-min=*:-macosx_version_min %(darwin_minversion)} \
 256    %{mmacosx-version-min=*:-macosx_version_min %*} \
 257    %{nomultidefs} \
 258    %{Zmulti_module:-multi_module} %{Zsingle_module:-single_module} \
 259    %{Zmultiply_defined*:-multiply_defined %*} \
 260    %{!Zmultiply_defined*:%{shared-libgcc: \
 261      %:version-compare(< 10.5 mmacosx-version-min= -multiply_defined) \
 262      %:version-compare(< 10.5 mmacosx-version-min= suppress)}} \
 263    %{Zmultiplydefinedunused*:-multiply_defined_unused %*} \
 264    %{fpie:-pie} \
 265    %{prebind} %{noprebind} %{nofixprebinding} %{prebind_all_twolevel_modules} \
 266    %{read_only_relocs} \
 267    %{sectcreate*} %{sectorder*} %{seg1addr*} %{segprot*} \
 268    %{Zsegaddr*:-segaddr %*} \
 269    %{Zsegs_read_only_addr*:-segs_read_only_addr %*} \
 270    %{Zsegs_read_write_addr*:-segs_read_write_addr %*} \
 271    %{Zseg_addr_table*: -seg_addr_table %*} \
 272    %{Zfn_seg_addr_table_filename*:-seg_addr_table_filename %*} \
 273    %{sub_library*} %{sub_umbrella*} \
 274    " LINK_SYSROOT_SPEC " \
 275    %{twolevel_namespace} %{twolevel_namespace_hints} \
 276    %{Zumbrella*: -umbrella %*} \
 277    %{undefined*} \
 278    %{Zunexported_symbols_list*:-unexported_symbols_list %*} \
 279    %{Zweak_reference_mismatches*:-weak_reference_mismatches %*} \
 280    %{!Zweak_reference_mismatches*:-weak_reference_mismatches non-weak} \
 281    %{X} \
 282    %{y*} \
 283    %{w} \
 284    %{pagezero_size*} %{segs_read_*} %{seglinkedit} %{noseglinkedit}  \
 285    %{sectalign*} %{sectobjectsymbols*} %{segcreate*} %{whyload} \
 286    %{whatsloaded} %{dylinker_install_name*} \
 287    %{dylinker} %{Mach} "
 288
 289
 290 /* Machine dependent libraries.  */
 291
 292 #define LIB_SPEC "%{!static:-lSystem}"
 293
 294 /* Support -mmacosx-version-min by supplying different (stub) libgcc_s.dylib
 295    libraries to link against, and by not linking against libgcc_s on
 296    earlier-than-10.3.9.
 297
 298    Note that by default, -lgcc_eh is not linked against!  This is
 299    because in a future version of Darwin the EH frame information may
 300    be in a new format, or the fallback routine might be changed; if
 301    you want to explicitly link against the static version of those
 302    routines, because you know you don't need to unwind through system
 303    libraries, you need to explicitly say -static-libgcc.
 304
 305    If it is linked against, it has to be before -lgcc, because it may
 306    need symbols from -lgcc.  */
 307 #undef REAL_LIBGCC_SPEC
 308 #define REAL_LIBGCC_SPEC                                                   \
 309    "%{static-libgcc|static: -lgcc_eh -lgcc;                                \
 310       shared-libgcc|fexceptions|fgnu-runtime:                              \
 311        %:version-compare(!> 10.5 mmacosx-version-min= -lgcc_s.10.4)        \
 312        %:version-compare(>< 10.5 10.6 mmacosx-version-min= -lgcc_s.10.5)   \
 313        %:version-compare(!> 10.5 mmacosx-version-min= -lgcc_ext.10.4)      \
 314        %:version-compare(>= 10.5 mmacosx-version-min= -lgcc_ext.10.5)      \
 315        -lgcc ;                                                             \
 316       :%:version-compare(>< 10.3.9 10.5 mmacosx-version-min= -lgcc_s.10.4) \
 317        %:version-compare(>< 10.5 10.6 mmacosx-version-min= -lgcc_s.10.5)   \
 318        %:version-compare(!> 10.5 mmacosx-version-min= -lgcc_ext.10.4)      \
 319        %:version-compare(>= 10.5 mmacosx-version-min= -lgcc_ext.10.5)      \
 320        -lgcc }"
 321
 322 /* We specify crt0.o as -lcrt0.o so that ld will search the library path.
 323
 324    crt3.o provides __cxa_atexit on systems that don't have it.  Since
 325    it's only used with C++, which requires passing -shared-libgcc, key
 326    off that to avoid unnecessarily adding a destructor to every
 327    powerpc program built.  */
 328
 329 #undef  STARTFILE_SPEC
 330 #define STARTFILE_SPEC                                                      \
 331   "%{Zdynamiclib: %(darwin_dylib1) }                                        \
 332    %{!Zdynamiclib:%{Zbundle:%{!static:-lbundle1.o}}                         \
 333      %{!Zbundle:%{pg:%{static:-lgcrt0.o}                                    \
 334                      %{!static:%{object:-lgcrt0.o}                          \
 335                                %{!object:%{preload:-lgcrt0.o}               \
 336                                  %{!preload:-lgcrt1.o %(darwin_crt2)}}}}    \
 337                 %{!pg:%{static:-lcrt0.o}                                    \
 338                       %{!static:%{object:-lcrt0.o}                          \
 339                                 %{!object:%{preload:-lcrt0.o}               \
 340                                   %{!preload: %(darwin_crt1)                \
 341                                               %(darwin_crt2)}}}}}}          \
 342   %{shared-libgcc:%:version-compare(< 10.5 mmacosx-version-min= crt3.o%s)}"
 343
 344 /* The native Darwin linker doesn't necessarily place files in the order
 345    that they're specified on the link line.  Thus, it is pointless
 346    to put anything in ENDFILE_SPEC.  */
 347 /* #define ENDFILE_SPEC "" */
 348
 349 #define DARWIN_EXTRA_SPECS                                              \
 350   { "darwin_crt1", DARWIN_CRT1_SPEC },                                  \
 351   { "darwin_dylib1", DARWIN_DYLIB1_SPEC },                              \
 352   { "darwin_minversion", DARWIN_MINVERSION_SPEC },
 353
 354 #define DARWIN_DYLIB1_SPEC                                              \
 355   "%:version-compare(!> 10.5 mmacosx-version-min= -ldylib1.o)           \
 356    %:version-compare(>= 10.5 mmacosx-version-min= -ldylib1.10.5.o)"
 357
 358 #define DARWIN_CRT1_SPEC                                                \
 359   "%:version-compare(!> 10.5 mmacosx-version-min= -lcrt1.o)             \
 360    %:version-compare(>= 10.5 mmacosx-version-min= -lcrt1.10.5.o)"
 361
 362 /* Default Darwin ASM_SPEC, very simple.  */
 363 #define ASM_SPEC "-arch %(darwin_arch) \
 364   %{Zforce_cpusubtype_ALL:-force_cpusubtype_ALL} \
 365   %{static}"
 366
 367 /* We still allow output of STABS.  */
 368
 369 #define DBX_DEBUGGING_INFO 1
 370
 371 #define DWARF2_DEBUGGING_INFO 1
 372 #define PREFERRED_DEBUGGING_TYPE DBX_DEBUG
 373
 374 #define DEBUG_FRAME_SECTION     "__DWARF,__debug_frame,regular,debug"
 375 #define DEBUG_INFO_SECTION      "__DWARF,__debug_info,regular,debug"
 376 #define DEBUG_ABBREV_SECTION    "__DWARF,__debug_abbrev,regular,debug"
 377 #define DEBUG_ARANGES_SECTION   "__DWARF,__debug_aranges,regular,debug"
 378 #define DEBUG_MACINFO_SECTION   "__DWARF,__debug_macinfo,regular,debug"
 379 #define DEBUG_LINE_SECTION      "__DWARF,__debug_line,regular,debug"
 380 #define DEBUG_LOC_SECTION       "__DWARF,__debug_loc,regular,debug"
 381 #define DEBUG_PUBNAMES_SECTION  "__DWARF,__debug_pubnames,regular,debug"
 382 #define DEBUG_PUBTYPES_SECTION  "__DWARF,__debug_pubtypes,regular,debug"
 383 #define DEBUG_STR_SECTION       "__DWARF,__debug_str,regular,debug"
 384 #define DEBUG_RANGES_SECTION    "__DWARF,__debug_ranges,regular,debug"
 385
 386 #define TARGET_WANT_DEBUG_PUB_SECTIONS true
 387
 388 /* When generating stabs debugging, use N_BINCL entries.  */
 389
 390 #define DBX_USE_BINCL
 391
 392 /* There is no limit to the length of stabs strings.  */
 393
 394 #define DBX_CONTIN_LENGTH 0
 395
 396 /* gdb needs a null N_SO at the end of each file for scattered loading.  */
 397
 398 #define DBX_OUTPUT_NULL_N_SO_AT_MAIN_SOURCE_FILE_END
 399
 400 /* GCC's definition of 'one_only' is the same as its definition of 'weak'.  */
 401 #define MAKE_DECL_ONE_ONLY(DECL) (DECL_WEAK (DECL) = 1)
 402
 403 /* Mach-O supports 'weak imports', and 'weak definitions' in coalesced
 404    sections.  machopic_select_section ensures that weak variables go in
 405    coalesced sections.  Weak aliases (or any other kind of aliases) are
 406    not supported.  Weak symbols that aren't visible outside the .s file
 407    are not supported.  */
 408 #define ASM_WEAKEN_DECL(FILE, DECL, NAME, ALIAS)                        \
 409   do {                                                                  \
 410     if (ALIAS)                                                          \
 411       {                                                                 \
 412         warning (0, "alias definitions not supported in Mach-O; ignored");      \
 413         break;                                                          \
 414       }                                                                 \
 415                                                                         \
 416     if (! DECL_EXTERNAL (DECL) && TREE_PUBLIC (DECL))                   \
 417       targetm.asm_out.globalize_label (FILE, NAME);                     \
 418     if (DECL_EXTERNAL (DECL))                                           \
 419       fputs ("\t.weak_reference ", FILE);                               \
 420     else if (lookup_attribute ("weak_import", DECL_ATTRIBUTES (DECL)))  \
 421       break;                                                            \
 422     else if (TREE_PUBLIC (DECL))                                        \
 423       fputs ("\t.weak_definition ", FILE);                              \
 424     else                                                                \
 425       break;                                                            \
 426     assemble_name (FILE, NAME);                                         \
 427     fputc ('\n', FILE);                                                 \
 428   } while (0)
 429
 430 /* Darwin has the pthread routines in libSystem, which every program
 431    links to, so there's no need for weak-ness for that.  */
 432 #define GTHREAD_USE_WEAK 0
 433
 434 /* The Darwin linker imposes two limitations on common symbols: they
 435    can't have hidden visibility, and they can't appear in dylibs.  As
 436    a consequence, we should never use common symbols to represent
 437    vague linkage. */
 438 #undef USE_COMMON_FOR_ONE_ONLY
 439 #define USE_COMMON_FOR_ONE_ONLY 0
 440
 441 /* The Darwin linker doesn't want coalesced symbols to appear in
 442    a static archive's table of contents. */
 443 #undef TARGET_WEAK_NOT_IN_ARCHIVE_TOC
 444 #define TARGET_WEAK_NOT_IN_ARCHIVE_TOC 1
 445
 446 /* On Darwin, we don't (at the time of writing) have linkonce sections
 447    with names, so it's safe to make the class data not comdat.  */
 448 #define TARGET_CXX_CLASS_DATA_ALWAYS_COMDAT hook_bool_void_false
 449
 450 /* For efficiency, on Darwin the RTTI information that is always
 451    emitted in the standard C++ library should not be COMDAT.  */
 452 #define TARGET_CXX_LIBRARY_RTTI_COMDAT hook_bool_void_false
 453
 454 /* We make exception information linkonce. */
 455 #undef TARGET_USES_WEAK_UNWIND_INFO
 456 #define TARGET_USES_WEAK_UNWIND_INFO 1
 457
 458 /* We need to use a nonlocal label for the start of an EH frame: the
 459    Darwin linker requires that a coalesced section start with a label.
 460    Unfortunately, it also requires that 'debug' sections don't contain
 461    labels.  */
 462 #undef FRAME_BEGIN_LABEL
 463 #define FRAME_BEGIN_LABEL (for_eh ? "EH_frame" : "Lframe")
 464
 465 /* Emit a label for the FDE corresponding to DECL.  EMPTY means
 466    emit a label for an empty FDE. */
 467 #define TARGET_ASM_EMIT_UNWIND_LABEL darwin_emit_unwind_label
 468
 469 /* Emit a label to separate the exception table.  */
 470 #define TARGET_ASM_EMIT_EXCEPT_TABLE_LABEL darwin_emit_except_table_label
 471
 472 /* Our profiling scheme doesn't LP labels and counter words.  */
 473
 474 #define NO_PROFILE_COUNTERS     1
 475
 476 #undef  INIT_SECTION_ASM_OP
 477 #define INIT_SECTION_ASM_OP
 478
 479 #undef  INVOKE__main
 480
 481 #define TARGET_ASM_CONSTRUCTOR  machopic_asm_out_constructor
 482 #define TARGET_ASM_DESTRUCTOR   machopic_asm_out_destructor
 483
 484 /* Always prefix with an underscore.  */
 485
 486 #define USER_LABEL_PREFIX "_"
 487
 488 /* A dummy symbol that will be replaced with the function base name.  */
 489 #define MACHOPIC_FUNCTION_BASE_NAME "<pic base>"
 490
 491 /* Don't output a .file directive.  That is only used by the assembler for
 492    error reporting.  */
 493 #undef  TARGET_ASM_FILE_START_FILE_DIRECTIVE
 494 #define TARGET_ASM_FILE_START_FILE_DIRECTIVE false
 495
 496 #undef  TARGET_ASM_FILE_END
 497 #define TARGET_ASM_FILE_END darwin_file_end
 498
 499 /* Because Mach-O relocations have a counter from 1 to 255 for the
 500    section number they apply to, it is necessary to output all
 501    normal sections before the LTO sections, to make sure that the
 502    sections that may have relocations always have a section number
 503    smaller than 255.  */
 504 #undef  TARGET_ASM_LTO_START
 505 #define TARGET_ASM_LTO_START darwin_asm_lto_start
 506 #undef  TARGET_ASM_LTO_END
 507 #define TARGET_ASM_LTO_END darwin_asm_lto_end
 508
 509 #define ASM_OUTPUT_SKIP(FILE,SIZE)  \
 510   fprintf (FILE, "\t.space "HOST_WIDE_INT_PRINT_UNSIGNED"\n", SIZE)
 511
 512 /* Give ObjC methods pretty symbol names.  */
 513
 514 #undef  OBJC_GEN_METHOD_LABEL
 515 #define OBJC_GEN_METHOD_LABEL(BUF,IS_INST,CLASS_NAME,CAT_NAME,SEL_NAME,NUM) \
 516   do { if (CAT_NAME)                                                    \
 517          sprintf (BUF, "%c[%s(%s) %s]", (IS_INST) ? '-' : '+',          \
 518                   (CLASS_NAME), (CAT_NAME), (SEL_NAME));                \
 519        else                                                             \
 520          sprintf (BUF, "%c[%s %s]", (IS_INST) ? '-' : '+',              \
 521                   (CLASS_NAME), (SEL_NAME));                            \
 522      } while (0)
 523
 524 /* The RTTI data (e.g., __ti4name) is common and public (and static),
 525    but it does need to be referenced via indirect PIC data pointers.
 526    The machopic_define_symbol calls are telling the machopic subsystem
 527    that the name *is* defined in this module, so it doesn't need to
 528    make them indirect.  */
 529
 530 #undef ASM_DECLARE_OBJECT_NAME
 531 #define ASM_DECLARE_OBJECT_NAME(FILE, NAME, DECL)                       \
 532   do {                                                                  \
 533     const char *xname = NAME;                                           \
 534     if (GET_CODE (XEXP (DECL_RTL (DECL), 0)) != SYMBOL_REF)             \
 535       xname = IDENTIFIER_POINTER (DECL_NAME (DECL));                    \
 536     if (! DECL_WEAK (DECL)                                              \
 537         && ((TREE_STATIC (DECL)                                         \
 538              && (!DECL_COMMON (DECL) || !TREE_PUBLIC (DECL)))           \
 539             || DECL_INITIAL (DECL)))                                    \
 540         machopic_define_symbol (DECL_RTL (DECL));                       \
 541     if ((TREE_STATIC (DECL)                                             \
 542          && (!DECL_COMMON (DECL) || !TREE_PUBLIC (DECL)))               \
 543         || DECL_INITIAL (DECL))                                         \
 544       (* targetm.encode_section_info) (DECL, DECL_RTL (DECL), false);   \
 545     ASM_OUTPUT_LABEL (FILE, xname);                                     \
 546     /* Darwin doesn't support zero-size objects, so give them a         \
 547        byte.  */                                                        \
 548     if (tree_low_cst (DECL_SIZE_UNIT (DECL), 1) == 0)                   \
 549       assemble_zeros (1);                                               \
 550   } while (0)
 551
 552 #define ASM_DECLARE_FUNCTION_NAME(FILE, NAME, DECL)                     \
 553   do {                                                                  \
 554     const char *xname = NAME;                                           \
 555     if (GET_CODE (XEXP (DECL_RTL (DECL), 0)) != SYMBOL_REF)             \
 556       xname = IDENTIFIER_POINTER (DECL_NAME (DECL));                    \
 557     if (! DECL_WEAK (DECL)                                              \
 558         && ((TREE_STATIC (DECL)                                         \
 559              && (!DECL_COMMON (DECL) || !TREE_PUBLIC (DECL)))           \
 560             || DECL_INITIAL (DECL)))                                    \
 561         machopic_define_symbol (DECL_RTL (DECL));                       \
 562     if ((TREE_STATIC (DECL)                                             \
 563          && (!DECL_COMMON (DECL) || !TREE_PUBLIC (DECL)))               \
 564         || DECL_INITIAL (DECL))                                         \
 565       (* targetm.encode_section_info) (DECL, DECL_RTL (DECL), false);   \
 566     ASM_OUTPUT_FUNCTION_LABEL (FILE, xname, DECL);                      \
 567   } while (0)
 568
 569 #undef TARGET_ASM_DECLARE_CONSTANT_NAME
 570 #define TARGET_ASM_DECLARE_CONSTANT_NAME darwin_asm_declare_constant_name
 571
 572 /* Wrap new method names in quotes so the assembler doesn't gag.
 573    Make Objective-C internal symbols local and in doing this, we need
 574    to accommodate the name mangling done by c++ on file scope locals.  */
 575
 576
 577 int darwin_label_is_anonymous_local_objc_name (const char *name);
 578
 579 #undef  ASM_OUTPUT_LABELREF
 580 #define ASM_OUTPUT_LABELREF(FILE,NAME)                                       \
 581   do {                                                                       \
 582        const char *xname = (NAME);                                           \
 583        if (! strcmp (xname, MACHOPIC_FUNCTION_BASE_NAME))                    \
 584          machopic_output_function_base_name(FILE);                           \
 585        else if (xname[0] == '&' || xname[0] == '*')                          \
 586          {                                                                   \
 587            int len = strlen (xname);                                         \
 588            if (len > 6 && !strcmp ("$stub", xname + len - 5))                \
 589              machopic_validate_stub_or_non_lazy_ptr (xname);                 \
 590            else if (len > 7 && !strcmp ("$stub\"", xname + len - 6))         \
 591              machopic_validate_stub_or_non_lazy_ptr (xname);                 \
 592            else if (len > 14 && !strcmp ("$non_lazy_ptr", xname + len - 13)) \
 593              machopic_validate_stub_or_non_lazy_ptr (xname);                 \
 594            else if (len > 15 && !strcmp ("$non_lazy_ptr\"", xname + len - 14)) \
 595              machopic_validate_stub_or_non_lazy_ptr (xname);                 \
 596            if (xname[1] != '"' && name_needs_quotes (&xname[1]))             \
 597              fprintf (FILE, "\"%s\"", &xname[1]);                            \
 598            else                                                              \
 599              fputs (&xname[1], FILE);                                        \
 600          }                                                                   \
 601        else if (xname[0] == '+' || xname[0] == '-')                          \
 602          fprintf (FILE, "\"%s\"", xname);                                    \
 603        else if (darwin_label_is_anonymous_local_objc_name (xname))                                   \
 604          fprintf (FILE, "L%s", xname);                                       \
 605        else if (!strncmp (xname, ".objc_class_name_", 17))                   \
 606          fprintf (FILE, "%s", xname);                                        \
 607        else if (xname[0] != '"' && name_needs_quotes (xname))                \
 608          fprintf (FILE, "\"%s\"", xname);                                    \
 609        else                                                                  \
 610          asm_fprintf (FILE, "%U%s", xname);                                  \
 611   } while (0)
 612
 613 /* Output before executable code.  */
 614 #undef TEXT_SECTION_ASM_OP
 615 #define TEXT_SECTION_ASM_OP "\t.text"
 616
 617 /* Output before writable data.  */
 618
 619 #undef DATA_SECTION_ASM_OP
 620 #define DATA_SECTION_ASM_OP "\t.data"
 621
 622 #undef  ALIGN_ASM_OP
 623 #define ALIGN_ASM_OP            ".align"
 624
 625 #undef  ASM_OUTPUT_ALIGN
 626 #define ASM_OUTPUT_ALIGN(FILE,LOG)      \
 627   if ((LOG) != 0)                       \
 628     fprintf (FILE, "\t%s %d\n", ALIGN_ASM_OP, (LOG))
 629
 630 /* Ensure correct alignment of bss data.  */
 631
 632 #undef  ASM_OUTPUT_ALIGNED_DECL_LOCAL
 633 #define ASM_OUTPUT_ALIGNED_DECL_LOCAL(FILE, DECL, NAME, SIZE, ALIGN)    \
 634   do {                                                                  \
 635     unsigned HOST_WIDE_INT _new_size = SIZE;                            \
 636     fputs ("\t.lcomm ", (FILE));                                                \
 637     assemble_name ((FILE), (NAME));                                     \
 638     if (_new_size == 0) _new_size = 1;                                  \
 639     fprintf ((FILE), ","HOST_WIDE_INT_PRINT_UNSIGNED",%u\n", _new_size, \
 640              floor_log2 ((ALIGN) / BITS_PER_UNIT));                     \
 641     if ((DECL) && ((TREE_STATIC (DECL)                                  \
 642          && (!DECL_COMMON (DECL) || !TREE_PUBLIC (DECL)))               \
 643         || DECL_INITIAL (DECL)))                                        \
 644       {                                                                 \
 645         (* targetm.encode_section_info) (DECL, DECL_RTL (DECL), false); \
 646         machopic_define_symbol (DECL_RTL (DECL));                       \
 647       }                                                                 \
 648   } while (0)
 649
 650 /* The maximum alignment which the object file format can support in
 651    bits.  For Mach-O, this is 2^15 bytes.  */
 652
 653 #undef  MAX_OFILE_ALIGNMENT
 654 #define MAX_OFILE_ALIGNMENT (0x8000 * 8)
 655
 656 /* The generic version, archs should over-ride where required.  */
 657 #define MACHOPIC_NL_SYMBOL_PTR_SECTION ".non_lazy_symbol_pointer"
 658
 659 /* These are used by -fbranch-probabilities */
 660 #define HOT_TEXT_SECTION_NAME "__TEXT,__text,regular,pure_instructions"
 661 #define UNLIKELY_EXECUTED_TEXT_SECTION_NAME \
 662                               "__TEXT,__unlikely,regular,pure_instructions"
 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 #define USE_SELECT_SECTION_FOR_FUNCTIONS
 678
 679 #undef  TARGET_ASM_SELECT_RTX_SECTION
 680 #define TARGET_ASM_SELECT_RTX_SECTION machopic_select_rtx_section
 681 #undef  TARGET_ASM_UNIQUE_SECTION
 682 #define TARGET_ASM_UNIQUE_SECTION darwin_unique_section
 683 #undef  TARGET_ASM_FUNCTION_RODATA_SECTION
 684 #define TARGET_ASM_FUNCTION_RODATA_SECTION default_no_function_rodata_section
 685 #undef  TARGET_ASM_RELOC_RW_MASK
 686 #define TARGET_ASM_RELOC_RW_MASK machopic_reloc_rw_mask
 687
 688
 689 #define ASM_DECLARE_UNRESOLVED_REFERENCE(FILE,NAME)                     \
 690     do {                                                                \
 691          if (FILE) {                                                    \
 692            if (MACHOPIC_INDIRECT)                                       \
 693              fprintf (FILE, "\t.lazy_reference ");                      \
 694            else                                                         \
 695              fprintf (FILE, "\t.reference ");                           \
 696            assemble_name (FILE, NAME);                                  \
 697            fprintf (FILE, "\n");                                        \
 698          }                                                              \
 699        } while (0)
 700
 701 #define ASM_DECLARE_CLASS_REFERENCE(FILE,NAME)                          \
 702     do {                                                                \
 703          if (FILE) {                                                    \
 704            fprintf (FILE, "\t");                                        \
 705            assemble_name (FILE, NAME);                                  \
 706            fprintf (FILE, "=0\n");                                      \
 707            (*targetm.asm_out.globalize_label) (FILE, NAME);             \
 708          }                                                              \
 709        } while (0)
 710
 711 /* Globalizing directive for a label.  */
 712 #define GLOBAL_ASM_OP "\t.globl "
 713 #define TARGET_ASM_GLOBALIZE_LABEL darwin_globalize_label
 714
 715 /* Emit an assembler directive to set visibility for a symbol.  Used
 716    to support visibility attribute and Darwin's private extern
 717    feature.  */
 718 #undef TARGET_ASM_ASSEMBLE_VISIBILITY
 719 #define TARGET_ASM_ASSEMBLE_VISIBILITY darwin_assemble_visibility
 720
 721 /* Extra attributes for Darwin.  */
 722 #define SUBTARGET_ATTRIBUTE_TABLE                                            \
 723   /* { name, min_len, max_len, decl_req, type_req, fn_type_req, handler } */ \
 724   { "apple_kext_compatibility", 0, 0, false, true, false,                    \
 725     darwin_handle_kext_attribute },                                          \
 726   { "weak_import", 0, 0, true, false, false,                                 \
 727     darwin_handle_weak_import_attribute }
 728
 729 #undef ASM_GENERATE_INTERNAL_LABEL
 730 #define ASM_GENERATE_INTERNAL_LABEL(LABEL,PREFIX,NUM)   \
 731   sprintf (LABEL, "*%s%ld", PREFIX, (long)(NUM))
 732
 733 #undef TARGET_ASM_MARK_DECL_PRESERVED
 734 #define TARGET_ASM_MARK_DECL_PRESERVED darwin_mark_decl_preserved
 735
 736 /* Set on a symbol with SYMBOL_FLAG_FUNCTION or
 737    MACHO_SYMBOL_FLAG_VARIABLE to indicate that the function or
 738    variable has been defined in this translation unit.
 739    When porting Mach-O to new architectures you need to make
 740    sure these aren't clobbered by the backend.  */
 741
 742 #define MACHO_SYMBOL_FLAG_VARIABLE (SYMBOL_FLAG_MACH_DEP)
 743 #define MACHO_SYMBOL_FLAG_DEFINED ((SYMBOL_FLAG_MACH_DEP) << 1)
 744
 745 /* Set on a symbol to indicate when fix-and-continue style code
 746    generation is being used and the symbol refers to a static symbol
 747    that should be rebound from new instances of a translation unit to
 748    the original instance of the data.  */
 749
 750 #define MACHO_SYMBOL_STATIC ((SYMBOL_FLAG_MACH_DEP) << 2)
 751
 752 /* Symbolic names for various things we might know about a symbol.  */
 753
 754 enum machopic_addr_class {
 755   MACHOPIC_UNDEFINED,
 756   MACHOPIC_DEFINED_DATA,
 757   MACHOPIC_UNDEFINED_DATA,
 758   MACHOPIC_DEFINED_FUNCTION,
 759   MACHOPIC_UNDEFINED_FUNCTION
 760 };
 761
 762 /* Macros defining the various PIC cases.  */
 763
 764 #undef  MACHO_DYNAMIC_NO_PIC_P
 765 #define MACHO_DYNAMIC_NO_PIC_P  (TARGET_MACHO_DYNAMIC_NO_PIC)
 766 #undef  MACHOPIC_INDIRECT
 767 #define MACHOPIC_INDIRECT       (flag_pic || MACHO_DYNAMIC_NO_PIC_P)
 768 #define MACHOPIC_JUST_INDIRECT  (MACHO_DYNAMIC_NO_PIC_P)
 769 #undef  MACHOPIC_PURE
 770 #define MACHOPIC_PURE           (flag_pic && ! MACHO_DYNAMIC_NO_PIC_P)
 771
 772 #undef TARGET_ENCODE_SECTION_INFO
 773 #define TARGET_ENCODE_SECTION_INFO  darwin_encode_section_info
 774 #undef TARGET_STRIP_NAME_ENCODING
 775 #define TARGET_STRIP_NAME_ENCODING  default_strip_name_encoding
 776
 777 #define GEN_BINDER_NAME_FOR_STUB(BUF,STUB,STUB_LENGTH)          \
 778   do {                                                          \
 779     const char *const stub_ = (STUB);                           \
 780     char *buffer_ = (BUF);                                      \
 781     strcpy (buffer_, stub_);                                    \
 782     if (stub_[0] == '"')                                        \
 783       {                                                         \
 784         strcpy (buffer_ + (STUB_LENGTH) - 1, "_binder\"");      \
 785       }                                                         \
 786     else                                                        \
 787       {                                                         \
 788         strcpy (buffer_ + (STUB_LENGTH), "_binder");            \
 789       }                                                         \
 790   } while (0)
 791
 792 #define GEN_SYMBOL_NAME_FOR_SYMBOL(BUF,SYMBOL,SYMBOL_LENGTH)    \
 793   do {                                                          \
 794     const char *const symbol_ = (SYMBOL);                       \
 795     char *buffer_ = (BUF);                                      \
 796     if (name_needs_quotes (symbol_) && symbol_[0] != '"')       \
 797       {                                                         \
 798           sprintf (buffer_, "\"%s\"", symbol_);                 \
 799       }                                                         \
 800     else                                                        \
 801       {                                                         \
 802         strcpy (buffer_, symbol_);                              \
 803       }                                                         \
 804   } while (0)
 805
 806 /* Given a symbol name string, create the lazy pointer version
 807    of the symbol name.  */
 808
 809 #define GEN_LAZY_PTR_NAME_FOR_SYMBOL(BUF,SYMBOL,SYMBOL_LENGTH)  \
 810   do {                                                          \
 811     const char *symbol_ = (SYMBOL);                             \
 812     char *buffer_ = (BUF);                                      \
 813     if (symbol_[0] == '"')                                      \
 814       {                                                         \
 815         strcpy (buffer_, "\"L");                                \
 816         strcpy (buffer_ + 2, symbol_ + 1);                      \
 817         strcpy (buffer_ + (SYMBOL_LENGTH), "$lazy_ptr\"");      \
 818       }                                                         \
 819     else if (name_needs_quotes (symbol_))                       \
 820       {                                                         \
 821         strcpy (buffer_, "\"L");                                \
 822         strcpy (buffer_ + 2, symbol_);                          \
 823         strcpy (buffer_ + (SYMBOL_LENGTH) + 2, "$lazy_ptr\"");  \
 824       }                                                         \
 825     else                                                        \
 826       {                                                         \
 827         strcpy (buffer_, "L");                                  \
 828         strcpy (buffer_ + 1, symbol_);                          \
 829         strcpy (buffer_ + (SYMBOL_LENGTH) + 1, "$lazy_ptr");    \
 830       }                                                         \
 831   } while (0)
 832
 833 #define EH_FRAME_SECTION_NAME   "__TEXT"
 834 #define EH_FRAME_SECTION_ATTR ",coalesced,no_toc+strip_static_syms+live_support"
 835
 836 /* Java runtime class list.  */
 837 #define JCR_SECTION_NAME "__DATA,jcr,regular,no_dead_strip"
 838
 839 #undef ASM_PREFERRED_EH_DATA_FORMAT
 840 #define ASM_PREFERRED_EH_DATA_FORMAT(CODE,GLOBAL)  \
 841   (((CODE) == 2 && (GLOBAL) == 1) \
 842    ? (DW_EH_PE_pcrel | DW_EH_PE_indirect | DW_EH_PE_sdata4) : \
 843      ((CODE) == 1 || (GLOBAL) == 0) ? DW_EH_PE_pcrel : DW_EH_PE_absptr)
 844
 845 #define ASM_OUTPUT_DWARF_DELTA(FILE,SIZE,LABEL1,LABEL2)  \
 846   darwin_asm_output_dwarf_delta (FILE, SIZE, LABEL1, LABEL2)
 847
 848 #define ASM_OUTPUT_DWARF_OFFSET(FILE,SIZE,LABEL,BASE)  \
 849   darwin_asm_output_dwarf_offset (FILE, SIZE, LABEL, BASE)
 850
 851 #define ASM_MAYBE_OUTPUT_ENCODED_ADDR_RTX(ASM_OUT_FILE, ENCODING, SIZE, ADDR, DONE)     \
 852       if (ENCODING == ASM_PREFERRED_EH_DATA_FORMAT (2, 1)) {                            \
 853         darwin_non_lazy_pcrel (ASM_OUT_FILE, ADDR);                                     \
 854         goto DONE;                                                                      \
 855       }
 856
 857 /* Experimentally, putting jump tables in text is faster on SPEC.
 858    Also this is needed for correctness for coalesced functions.  */
 859
 860 #ifndef JUMP_TABLES_IN_TEXT_SECTION
 861 #define JUMP_TABLES_IN_TEXT_SECTION 1
 862 #endif
 863
 864 #define TARGET_TERMINATE_DW2_EH_FRAME_INFO false
 865
 866 #define TARGET_ASM_INIT_SECTIONS darwin_init_sections
 867 #undef TARGET_ASM_NAMED_SECTION
 868 #define TARGET_ASM_NAMED_SECTION darwin_asm_named_section
 869
 870 /* Handle pragma weak and pragma pack.  */
 871 #define HANDLE_SYSV_PRAGMA 1
 872
 873 #define HANDLE_PRAGMA_PACK_PUSH_POP 1
 874
 875 #define DARWIN_REGISTER_TARGET_PRAGMAS()                        \
 876   do {                                                          \
 877     if (!flag_preprocess_only)                                  \
 878       cpp_register_pragma (parse_in, NULL, "mark",              \
 879                            darwin_pragma_ignore, false);        \
 880     c_register_pragma (0, "options", darwin_pragma_options);    \
 881     c_register_pragma (0, "segment", darwin_pragma_ignore);     \
 882     c_register_pragma (0, "unused", darwin_pragma_unused);      \
 883     c_register_pragma (0, "ms_struct", darwin_pragma_ms_struct); \
 884   } while (0)
 885
 886 #undef ASM_APP_ON
 887 #define ASM_APP_ON ""
 888 #undef ASM_APP_OFF
 889 #define ASM_APP_OFF ""
 890
 891 void darwin_register_frameworks (const char *, const char *, int);
 892 void darwin_register_objc_includes (const char *, const char *, int);
 893 #define TARGET_EXTRA_PRE_INCLUDES darwin_register_objc_includes
 894 #define TARGET_EXTRA_INCLUDES darwin_register_frameworks
 895
 896 void add_framework_path (char *);
 897 #define TARGET_OPTF add_framework_path
 898
 899 #define TARGET_POSIX_IO
 900
 901 /* All new versions of Darwin have C99 functions.  */
 902
 903 #define TARGET_C99_FUNCTIONS 1
 904
 905 #define WINT_TYPE "int"
 906
 907 /* Every program on darwin links against libSystem which contains the pthread
 908    routines, so there's no need to explicitly call out when doing threaded
 909    work.  */
 910
 911 #undef GOMP_SELF_SPECS
 912 #define GOMP_SELF_SPECS ""
 913
 914 /* Darwin can't support anchors until we can cope with the adjustments
 915    to size that ASM_DECLARE_OBJECT_NAME and ASM_DECLARE_CONSTANT_NAME
 916    when outputting members of an anchor block and the linker can be
 917    taught to keep them together or we find some other suitable
 918    code-gen technique.  */
 919
 920 #if 0
 921 #define TARGET_ASM_OUTPUT_ANCHOR darwin_asm_output_anchor
 922 #else
 923 #define TARGET_ASM_OUTPUT_ANCHOR NULL
 924 #endif
 925
 926 /* Attempt to turn on execute permission for the stack.  This may be
 927     used by TARGET_TRAMPOLINE_INIT if the target needs it (that is,
 928     if the target machine can change execute permissions on a page).
 929
 930     There is no way to query the execute permission of the stack, so
 931     we always issue the mprotect() call.
 932
 933     Unfortunately it is not possible to make this namespace-clean.
 934
 935     Also note that no errors should be emitted by this code; it is
 936     considered dangerous for library calls to send messages to
 937     stdout/stderr.  */
 938
 939 #define ENABLE_EXECUTE_STACK                                            \
 940 extern void __enable_execute_stack (void *);                            \
 941 void                                                                    \
 942 __enable_execute_stack (void *addr)                                     \
 943 {                                                                       \
 944    extern int mprotect (void *, size_t, int);                           \
 945    extern int getpagesize (void);                                       \
 946    static int size;                                                     \
 947    static long mask;                                                    \
 948                                                                         \
 949    char *page, *end;                                                    \
 950                                                                         \
 951    if (size == 0)                                                       \
 952      {                                                                  \
 953        size = getpagesize();                                            \
 954        mask = ~((long) size - 1);                                       \
 955      }                                                                  \
 956                                                                         \
 957    page = (char *) (((long) addr) & mask);                              \
 958    end  = (char *) ((((long) (addr + (TARGET_64BIT ? 48 : 40))) & mask) + size); \
 959                                                                         \
 960    /* 7 == PROT_READ | PROT_WRITE | PROT_EXEC */                        \
 961    (void) mprotect (page, end - page, 7);                               \
 962 }
 963
 964 /* For Apple KEXTs, we make the constructors return this to match gcc
 965    2.95.  */
 966 #define TARGET_CXX_CDTOR_RETURNS_THIS (darwin_kextabi_p)
 967 #define TARGET_KEXTABI flag_apple_kext
 968
 969 /* We have target-specific builtins.  */
 970 #define TARGET_FOLD_BUILTIN darwin_fold_builtin
 971
 972 #define TARGET_OBJC_CONSTRUCT_STRING_OBJECT \
 973   darwin_objc_construct_string
 974
 975 #define TARGET_STRING_OBJECT_REF_TYPE_P \
 976   darwin_cfstring_ref_p
 977
 978 #define TARGET_N_FORMAT_TYPES 1
 979 #define TARGET_FORMAT_TYPES darwin_additional_format_types
 980
 981 #define TARGET_CHECK_STRING_OBJECT_FORMAT_ARG \
 982   darwin_check_cfstring_format_arg
 983
 984 #define TARGET_HAS_TARGETCM 1
 985
 986 extern void darwin_driver_init (unsigned int *decoded_options_count,
 987                                 struct cl_decoded_option **decoded_options);
 988 #define GCC_DRIVER_HOST_INITIALIZATION \
 989   darwin_driver_init (&decoded_options_count, &decoded_options)
 990
 991 /* The Apple assembler and linker do not support constructor priorities.  */
 992 #undef SUPPORTS_INIT_PRIORITY
 993 #define SUPPORTS_INIT_PRIORITY 0
 994
 995 #endif /* CONFIG_DARWIN_H */