gcc/config/darwin.h

   1 /* Target definitions for Darwin (Mac OS X) systems.
   2    Copyright (C) 1989-2019 Free Software Foundation, Inc.
   3    Contributed by Apple Computer Inc.
   4
   5 This file is part of GCC.
   6
   7 GCC is free software; you can redistribute it and/or modify
   8 it under the terms of the GNU General Public License as published by
   9 the Free Software Foundation; either version 3, or (at your option)
  10 any later version.
  11
  12 GCC is distributed in the hope that it will be useful,
  13 but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 GNU General Public License for more details.
  16
  17 Under Section 7 of GPL version 3, you are granted additional
  18 permissions described in the GCC Runtime Library Exception, version
  19 3.1, as published by the Free Software Foundation.
  20
  21 You should have received a copy of the GNU General Public License and
  22 a copy of the GCC Runtime Library Exception along with this program;
  23 see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
  24 <http://www.gnu.org/licenses/>.  */
  25
  26 #ifndef CONFIG_DARWIN_H
  27 #define CONFIG_DARWIN_H
  28
  29 /* The definitions in this file are common to all processor types
  30    running Darwin, which is the kernel for Mac OS X.  Darwin is
  31    basically a BSD user layer laid over a Mach kernel, then evolved
  32    for many years (at NeXT) in parallel with other Unix systems.  So
  33    while the runtime is a somewhat idiosyncratic Mach-based thing,
  34    other definitions look like they would for a BSD variant.  */
  35
  36 /* Although NeXT ran on many different architectures, as of Jan 2001
  37    the only supported Darwin targets are PowerPC and x86.  */
  38
  39 /* One of Darwin's NeXT legacies is the Mach-O format, which is partly
  40    like a.out and partly like COFF, with additional features like
  41    multi-architecture binary support.  */
  42
  43 #define DARWIN_X86 0
  44 #define DARWIN_PPC 0
  45
  46 /* Suppress g++ attempt to link in the math library automatically. */
  47 #define MATH_LIBRARY ""
  48
  49 /* We have atexit.  */
  50
  51 #define HAVE_ATEXIT
  52
  53 /* Define an empty body for the function do_global_dtors() in libgcc2.c.  */
  54
  55 #define DO_GLOBAL_DTORS_BODY
  56
  57 /* The string value for __SIZE_TYPE__.  */
  58
  59 #ifndef SIZE_TYPE
  60 #define SIZE_TYPE "long unsigned int"
  61 #endif
  62
  63 /* Type used for ptrdiff_t, as a string used in a declaration.  */
  64
  65 #undef  PTRDIFF_TYPE
  66 #define PTRDIFF_TYPE "int"
  67
  68 /* wchar_t is int.  */
  69
  70 #undef  WCHAR_TYPE
  71 #define WCHAR_TYPE "int"
  72 #undef  WCHAR_TYPE_SIZE
  73 #define WCHAR_TYPE_SIZE 32
  74
  75 #define INT8_TYPE "signed char"
  76 #define INT16_TYPE "short int"
  77 #define INT32_TYPE "int"
  78 #define INT64_TYPE "long long int"
  79 #define UINT8_TYPE "unsigned char"
  80 #define UINT16_TYPE "short unsigned int"
  81 #define UINT32_TYPE "unsigned int"
  82 #define UINT64_TYPE "long long unsigned int"
  83
  84 #define INT_LEAST8_TYPE "signed char"
  85 #define INT_LEAST16_TYPE "short int"
  86 #define INT_LEAST32_TYPE "int"
  87 #define INT_LEAST64_TYPE "long long int"
  88 #define UINT_LEAST8_TYPE "unsigned char"
  89 #define UINT_LEAST16_TYPE "short unsigned int"
  90 #define UINT_LEAST32_TYPE "unsigned int"
  91 #define UINT_LEAST64_TYPE "long long unsigned int"
  92
  93 #define INT_FAST8_TYPE "signed char"
  94 #define INT_FAST16_TYPE "short int"
  95 #define INT_FAST32_TYPE "int"
  96 #define INT_FAST64_TYPE "long long int"
  97 #define UINT_FAST8_TYPE "unsigned char"
  98 #define UINT_FAST16_TYPE "short unsigned int"
  99 #define UINT_FAST32_TYPE "unsigned int"
 100 #define UINT_FAST64_TYPE "long long unsigned int"
 101
 102 #define INTPTR_TYPE "long int"
 103 #define UINTPTR_TYPE "long unsigned int"
 104
 105 #define SIG_ATOMIC_TYPE "int"
 106
 107 /* Default to using the NeXT-style runtime, since that's what is
 108    pre-installed on Darwin systems.  */
 109
 110 #define NEXT_OBJC_RUNTIME 1
 111
 112 /* Don't default to pcc-struct-return, because gcc is the only compiler, and
 113    we want to retain compatibility with older gcc versions.  */
 114
 115 #undef  DEFAULT_PCC_STRUCT_RETURN
 116 #define DEFAULT_PCC_STRUCT_RETURN 0
 117
 118 /* True if pragma ms_struct is in effect.  */
 119 extern GTY(()) int darwin_ms_struct;
 120
 121 /* The majority of Darwin's special driver opts are direct access to ld flags
 122    (to save the user typing -Wl,xxxxx or Xlinker xxxxx) but we can't process
 123    them here, since doing so will make it appear that there are linker infiles
 124    and the linker will invoked even when it is not necessary.
 125
 126    However, a few can be handled and we can elide options that are silently-
 127    ignored defaults, plus warn on obsolete ones that no longer function.  */
 128 #undef SUBTARGET_DRIVER_SELF_SPECS
 129 #define SUBTARGET_DRIVER_SELF_SPECS                                     \
 130 "%{fapple-kext|mkernel:-static}",                                       \
 131 "%{gfull:-g -fno-eliminate-unused-debug-symbols} %<gfull",              \
 132 "%{gsplit-dwarf:%ngsplit-dwarf is not supported on this platform} \
 133    %<gsplit-dwarf",                                                     \
 134 "%{gused:-g -feliminate-unused-debug-symbols} %<gused",                 \
 135 "%{shared:-Zdynamiclib} %<shared",                                      \
 136 "%{static:%{Zdynamic:%e conflicting code gen style switches are used}}",\
 137 "%{y*:%nthe y option is obsolete and ignored} %<y*",                    \
 138 "%<Mach %<X"
 139
 140 #if LD64_HAS_EXPORT_DYNAMIC
 141 #define DARWIN_RDYNAMIC "%{rdynamic:-export_dynamic}"
 142 #else
 143 #define DARWIN_RDYNAMIC "%{rdynamic:%nrdynamic is not supported}"
 144 #endif
 145
 146 /* FIXME: we should check that the linker supports the -pie and -no_pie.
 147    options.  */
 148 #define DARWIN_PIE_SPEC \
 149 "%{pie|fpie|fPIE:\
 150    %{mdynamic-no-pic: \
 151      %n'-mdynamic-no-pic' overrides '-pie', '-fpie' or '-fPIE'; \
 152      :%:version-compare(>= 10.5 mmacosx-version-min= -pie) }} "
 153
 154 #define DARWIN_NOPIE_SPEC \
 155 "%{no-pie|fno-pie|fno-PIE: \
 156    %:version-compare(>= 10.7 mmacosx-version-min= -no_pie) }"
 157
 158 #define DARWIN_CC1_SPEC                                                 \
 159   "%{findirect-virtual-calls: -fapple-kext} %<findirect-virtual-calls " \
 160   "%{fterminated-vtables: -fapple-kext} %<fterminated-vtables "         \
 161   "%<filelist* %<framework*"
 162
 163 #define SUBSUBTARGET_OVERRIDE_OPTIONS                                   \
 164   do {                                                                  \
 165     darwin_override_options ();                                         \
 166   } while (0)
 167
 168 #define SUBTARGET_C_COMMON_OVERRIDE_OPTIONS do {                        \
 169     if (flag_mkernel || flag_apple_kext)                                \
 170       {                                                                 \
 171         if (flag_use_cxa_atexit == 2)                                   \
 172           flag_use_cxa_atexit = 0;                                      \
 173         /* kexts should always be built without the coalesced sections  \
 174            because the kernel loader doesn't grok such sections.  */    \
 175         flag_weak = 0;                                                  \
 176         /* No RTTI in kexts.  */                                        \
 177         flag_rtti = 0;                                                  \
 178       }                                                                 \
 179   } while (0)
 180
 181 /* Machine dependent cpp options.  Don't add more options here, add
 182    them to darwin_cpp_builtins in darwin-c.c.  */
 183
 184 #undef  CPP_SPEC
 185 #define CPP_SPEC "%{static:%{!dynamic:-D__STATIC__}}%{!static:-D__DYNAMIC__}" \
 186         " %{pthread:-D_REENTRANT}"
 187
 188 /* This is a fix for PR41260 by passing -no_compact_unwind on darwin10 and
 189    later until the assembler, linker and libunwind are able to deal with the
 190    output from GCC.
 191
 192    FIXME: we should check that the linker supports the option.
 193 */
 194
 195 #define DARWIN_NOCOMPACT_UNWIND \
 196 " %:version-compare(>= 10.6 mmacosx-version-min= -no_compact_unwind) "
 197
 198 /* In Darwin linker specs we can put -lcrt0.o and ld will search the library
 199    path for crt0.o or -lcrtx.a and it will search for for libcrtx.a.  As for
 200    other ports, we can also put xxx.{o,a}%s and get the appropriate complete
 201    startfile absolute directory.  This latter point is important when we want
 202    to override ld's rule of .dylib being found ahead of .a and the user wants
 203    the convenience library to be linked.  */
 204
 205 /* The LINK_COMMAND spec is mostly a clone of the standard LINK_COMMAND_SPEC,
 206    plus precomp, libtool, and fat build additions.
 207
 208    In general, random Darwin linker flags should go into LINK_SPEC
 209    instead of LINK_COMMAND_SPEC.  The command spec is better for
 210    specifying the handling of options understood by generic Unix
 211    linkers, and for positional arguments like libraries.  */
 212
 213 #define LINK_COMMAND_SPEC_A \
 214    "%{!fdump=*:%{!fsyntax-only:%{!c:%{!M:%{!MM:%{!E:%{!S:\
 215     %(linker)" \
 216     LINK_PLUGIN_SPEC \
 217     "%{flto*:%<fcompare-debug*} \
 218      %{flto} %{fno-lto} %{flto=*} \
 219     %l " LINK_COMPRESS_DEBUG_SPEC \
 220    "%X %{s} %{t} %{Z} %{u*} \
 221     %{e*} %{r} \
 222     %{o*}%{!o:-o a.out} \
 223     %{!nostdlib:%{!r:%{!nostartfiles:%S}}} \
 224     %{L*} %(link_libgcc) %o %{fprofile-arcs|fprofile-generate*|coverage:-lgcov} \
 225     %{fopenacc|fopenmp|%:gt(%{ftree-parallelize-loops=*:%*} 1): \
 226       %{static|static-libgcc|static-libstdc++|static-libgfortran: libgomp.a%s; : -lgomp } } \
 227     %{fgnu-tm: \
 228       %{static|static-libgcc|static-libstdc++|static-libgfortran: libitm.a%s; : -litm } } \
 229     %{!nostdlib:%{!r:%{!nodefaultlibs:\
 230       %{%:sanitize(address): -lasan } \
 231       %{%:sanitize(undefined): -lubsan } \
 232       %(link_ssp) \
 233       %(link_gcc_c_sequence) \
 234     }}}\
 235     %{!nostdlib:%{!r:%{!nostartfiles:%E}}} %{T*} %{F*} "\
 236     DARWIN_PIE_SPEC \
 237     DARWIN_NOPIE_SPEC \
 238     DARWIN_RDYNAMIC \
 239     DARWIN_NOCOMPACT_UNWIND \
 240     "}}}}}}} %<pie %<no-pie %<rdynamic "
 241
 242 #define DSYMUTIL "\ndsymutil"
 243
 244 #define DSYMUTIL_SPEC \
 245    "%{!fdump=*:%{!fsyntax-only:%{!c:%{!M:%{!MM:%{!E:%{!S:\
 246     %{v} \
 247     %{gdwarf-2:%{!gstabs*:%{%:debug-level-gt(0): -idsym}}}\
 248     %{.c|.cc|.C|.cpp|.cp|.c++|.cxx|.CPP|.m|.mm: \
 249     %{gdwarf-2:%{!gstabs*:%{%:debug-level-gt(0): -dsym}}}}}}}}}}}"
 250
 251 #define LINK_COMMAND_SPEC LINK_COMMAND_SPEC_A DSYMUTIL_SPEC
 252
 253 /* Tell collect2 to run dsymutil for us as necessary.  */
 254 #define COLLECT_RUN_DSYMUTIL 1
 255
 256 /* We only want one instance of %G, since libSystem (Darwin's -lc) does not depend
 257    on libgcc.  */
 258 #undef  LINK_GCC_C_SEQUENCE_SPEC
 259 #define LINK_GCC_C_SEQUENCE_SPEC "%G %{!nolibc:%L}"
 260
 261 /* ld64 supports a sysroot, it just has a different name and there's no easy
 262    way to check for it at config time.  */
 263 #undef HAVE_LD_SYSROOT
 264 #define HAVE_LD_SYSROOT 1
 265 /* It seems the only (working) way to get a space after %R is to append a
 266    dangling '/'.  */
 267 #define SYSROOT_SPEC "%{!isysroot*:-syslibroot %R/ }"
 268
 269 /* Do the same as clang, for now, and insert the sysroot for ld when an
 270    isysroot is specified.  */
 271 #define LINK_SYSROOT_SPEC "%{isysroot*:-syslibroot %*}"
 272
 273 /* Suppress the addition of extra prefix paths when a sysroot is in use.  */
 274 #define STANDARD_STARTFILE_PREFIX_1 ""
 275 #define STANDARD_STARTFILE_PREFIX_2 ""
 276
 277 /* Please keep the random linker options in alphabetical order (modulo
 278    'Z' and 'no' prefixes). Note that options taking arguments may appear
 279    multiple times on a command line with different arguments each time,
 280    so put a * after their names so all of them get passed.  */
 281 #define LINK_SPEC  \
 282   "%{static}%{!static:-dynamic} \
 283    %:remove-outfile(-ldl) \
 284    %:remove-outfile(-lm) \
 285    %:remove-outfile(-lpthread) \
 286    %{fgnu-runtime: %{static|static-libgcc: \
 287                      %:replace-outfile(-lobjc libobjc-gnu.a%s); \
 288                     :%:replace-outfile(-lobjc -lobjc-gnu ) } }\
 289    %{static|static-libgcc|static-libgfortran:%:replace-outfile(-lgfortran libgfortran.a%s)}\
 290    %{static|static-libgcc|static-libstdc++|static-libgfortran:%:replace-outfile(-lgomp libgomp.a%s)}\
 291    %{static|static-libgcc|static-libstdc++:%:replace-outfile(-lstdc++ libstdc++.a%s)}\
 292    %{!Zdynamiclib: \
 293      %{Zforce_cpusubtype_ALL:-arch %(darwin_arch) -force_cpusubtype_ALL} \
 294      %{!Zforce_cpusubtype_ALL:-arch %(darwin_subarch)} \
 295      %{Zbundle:-bundle} \
 296      %{Zbundle_loader*:-bundle_loader %*} \
 297      %{client_name*} \
 298      %{compatibility_version*:%e-compatibility_version only allowed with -dynamiclib\
 299 } \
 300      %{current_version*:%e-current_version only allowed with -dynamiclib} \
 301      %{Zforce_flat_namespace:-force_flat_namespace} \
 302      %{Zinstall_name*:%e-install_name only allowed with -dynamiclib} \
 303      %{keep_private_externs} \
 304      %{private_bundle} \
 305     } \
 306    %{Zdynamiclib: -dylib \
 307      %{Zbundle:%e-bundle not allowed with -dynamiclib} \
 308      %{Zbundle_loader*:%e-bundle_loader not allowed with -dynamiclib} \
 309      %{client_name*:%e-client_name not allowed with -dynamiclib} \
 310      %{compatibility_version*:-dylib_compatibility_version %*} \
 311      %{current_version*:-dylib_current_version %*} \
 312      %{Zforce_cpusubtype_ALL:-arch %(darwin_arch)} \
 313      %{!Zforce_cpusubtype_ALL: -arch %(darwin_subarch)} \
 314      %{Zforce_flat_namespace:%e-force_flat_namespace not allowed with -dynamiclib} \
 315      %{Zinstall_name*:-dylib_install_name %*} \
 316      %{keep_private_externs:%e-keep_private_externs not allowed with -dynamiclib} \
 317      %{private_bundle:%e-private_bundle not allowed with -dynamiclib} \
 318     } \
 319    %{Zall_load:-all_load} \
 320    %{Zallowable_client*:-allowable_client %*} \
 321    %{Zbind_at_load:-bind_at_load} \
 322    %{Zarch_errors_fatal:-arch_errors_fatal} \
 323    %{Zdead_strip:-dead_strip} \
 324    %{Zno_dead_strip_inits_and_terms:-no_dead_strip_inits_and_terms} \
 325    %{Zdylib_file*:-dylib_file %*} \
 326    %{Zdynamic:-dynamic}\
 327    %{Zexported_symbols_list*:-exported_symbols_list %*} \
 328    %{Zflat_namespace:-flat_namespace} \
 329    %{headerpad_max_install_names} \
 330    %{Zimage_base*:-image_base %*} \
 331    %{Zinit*:-init %*} \
 332    %{mmacosx-version-min=*:-macosx_version_min %*} \
 333    %{nomultidefs} \
 334    %{Zmulti_module:-multi_module} %{Zsingle_module:-single_module} \
 335    %{Zmultiply_defined*:-multiply_defined %*} \
 336    %{!Zmultiply_defined*:%{shared-libgcc: \
 337      %:version-compare(< 10.5 mmacosx-version-min= -multiply_defined) \
 338      %:version-compare(< 10.5 mmacosx-version-min= suppress)}} \
 339    %{Zmultiplydefinedunused*:-multiply_defined_unused %*} \
 340    %{prebind} %{noprebind} %{nofixprebinding} %{prebind_all_twolevel_modules} \
 341    %{read_only_relocs} \
 342    %{sectcreate*} %{sectorder*} %{seg1addr*} %{segprot*} \
 343    %{Zsegaddr*:-segaddr %*} \
 344    %{Zsegs_read_only_addr*:-segs_read_only_addr %*} \
 345    %{Zsegs_read_write_addr*:-segs_read_write_addr %*} \
 346    %{Zseg_addr_table*: -seg_addr_table %*} \
 347    %{Zfn_seg_addr_table_filename*:-seg_addr_table_filename %*} \
 348    %{sub_library*} %{sub_umbrella*} \
 349    " LINK_SYSROOT_SPEC " \
 350    %{twolevel_namespace} %{twolevel_namespace_hints} \
 351    %{Zumbrella*: -umbrella %*} \
 352    %{undefined*} \
 353    %{Zunexported_symbols_list*:-unexported_symbols_list %*} \
 354    %{Zweak_reference_mismatches*:-weak_reference_mismatches %*} \
 355    %{!Zweak_reference_mismatches*:-weak_reference_mismatches non-weak} \
 356    %{w} \
 357    %{pagezero_size*} %{segs_read_*} %{seglinkedit} %{noseglinkedit}  \
 358    %{sectalign*} %{sectobjectsymbols*} %{segcreate*} %{whyload} \
 359    %{whatsloaded} %{dylinker_install_name*} \
 360    %{dylinker} "
 361
 362
 363 /* Machine dependent libraries.  */
 364
 365 #define LIB_SPEC "%{!static:-lSystem}"
 366
 367 /* Support -mmacosx-version-min by supplying different (stub) libgcc_s.dylib
 368    libraries to link against, and by not linking against libgcc_s on
 369    earlier-than-10.3.9.  If we need exceptions, prior to 10.3.9, then we have
 370    to link the static eh lib, since there's no shared version on the system.
 371
 372    Note that by default, except as above, -lgcc_eh is not linked against.
 373    This is because,in general, we need to unwind through system libraries that
 374    are linked with the shared unwinder in libunwind (or libgcc_s for 10.4/5).
 375
 376    The static version of the current libgcc unwinder (which differs from the
 377    implementation in libunwind.dylib on systems Darwin10 [10.6]+) can be used
 378    by specifying -static-libgcc.
 379
 380    If libgcc_eh is linked against, it has to be before -lgcc, because it might
 381    need symbols from -lgcc.  */
 382
 383 #undef REAL_LIBGCC_SPEC
 384 #define REAL_LIBGCC_SPEC                                                   \
 385    "%{static-libgcc|static: -lgcc_eh -lgcc;                                \
 386       shared-libgcc|fexceptions|fobjc-exceptions|fgnu-runtime:             \
 387        %:version-compare(!> 10.3.9 mmacosx-version-min= -lgcc_eh)          \
 388        %:version-compare(>< 10.3.9 10.5 mmacosx-version-min= -lgcc_s.10.4) \
 389        %:version-compare(>< 10.5 10.6 mmacosx-version-min= -lgcc_s.10.5)   \
 390        %:version-compare(>< 10.3.9 10.5 mmacosx-version-min= -lgcc_ext.10.4) \
 391        %:version-compare(>= 10.5 mmacosx-version-min= -lgcc_ext.10.5)      \
 392        -lgcc ;                                                             \
 393       :%:version-compare(>< 10.3.9 10.5 mmacosx-version-min= -lgcc_s.10.4) \
 394        %:version-compare(>< 10.5 10.6 mmacosx-version-min= -lgcc_s.10.5)   \
 395        %:version-compare(>< 10.3.9 10.5 mmacosx-version-min= -lgcc_ext.10.4) \
 396        %:version-compare(>= 10.5 mmacosx-version-min= -lgcc_ext.10.5)      \
 397        -lgcc }"
 398
 399 /* We specify crt0.o as -lcrt0.o so that ld will search the library path.  */
 400
 401 #undef  STARTFILE_SPEC
 402 #define STARTFILE_SPEC                                                      \
 403 "%{Zdynamiclib: %(darwin_dylib1) %{fgnu-tm: -lcrttms.o}}                    \
 404  %{!Zdynamiclib:%{Zbundle:%(darwin_bundle1)}                                \
 405      %{!Zbundle:%{pg:%{static:-lgcrt0.o}                                    \
 406                      %{!static:%{object:-lgcrt0.o}                          \
 407                                %{!object:%{preload:-lgcrt0.o}               \
 408                                  %{!preload:-lgcrt1.o                       \
 409                                  %:version-compare(>= 10.8 mmacosx-version-min= -no_new_main) \
 410                                  %(darwin_crt2)}}}}    \
 411                 %{!pg:%{static:-lcrt0.o}                                    \
 412                       %{!static:%{object:-lcrt0.o}                          \
 413                                 %{!object:%{preload:-lcrt0.o}               \
 414                                   %{!preload: %(darwin_crt1)                \
 415                                               %(darwin_crt2)}}}}}}          \
 416  %(darwin_crt3)"
 417
 418 /* We want a destructor last in the list.  */
 419 #define TM_DESTRUCTOR "%{fgnu-tm: -lcrttme.o}"
 420 #define ENDFILE_SPEC TM_DESTRUCTOR
 421
 422 #define DARWIN_EXTRA_SPECS                                              \
 423   { "darwin_crt1", DARWIN_CRT1_SPEC },                                  \
 424   { "darwin_crt2", DARWIN_CRT2_SPEC },                                  \
 425   { "darwin_crt3", DARWIN_CRT3_SPEC },                                  \
 426   { "darwin_dylib1", DARWIN_DYLIB1_SPEC },                              \
 427   { "darwin_bundle1", DARWIN_BUNDLE1_SPEC },
 428
 429 #define DARWIN_CRT1_SPEC                                                \
 430   "%:version-compare(!> 10.5 mmacosx-version-min= -lcrt1.o)             \
 431    %:version-compare(>< 10.5 10.6 mmacosx-version-min= -lcrt1.10.5.o)   \
 432    %:version-compare(>< 10.6 10.8 mmacosx-version-min= -lcrt1.10.6.o)   \
 433    %{fgnu-tm: -lcrttms.o}"
 434
 435 #define DARWIN_CRT2_SPEC ""
 436
 437 /* crt3.o provides __cxa_atexit on systems that don't have it (and a fix
 438    up for faulty versions on 10.4).  Since it's only used with C++, which
 439    requires passing -shared-libgcc, key off that to avoid unnecessarily
 440    adding a destructor to every program built for 10.4 or earlier.  */
 441
 442 #define DARWIN_CRT3_SPEC \
 443 "%{shared-libgcc:%:version-compare(< 10.5 mmacosx-version-min= crt3.o%s)}"
 444
 445 #define DARWIN_DYLIB1_SPEC                                              \
 446   "%:version-compare(!> 10.5 mmacosx-version-min= -ldylib1.o)           \
 447    %:version-compare(>< 10.5 10.6 mmacosx-version-min= -ldylib1.10.5.o)"
 448
 449 #define DARWIN_BUNDLE1_SPEC \
 450 "%{!static:%:version-compare(< 10.6 mmacosx-version-min= -lbundle1.o)   \
 451            %{fgnu-tm: -lcrttms.o}}"
 452
 453 #ifdef HAVE_AS_MMACOSX_VERSION_MIN_OPTION
 454 /* Emit macosx version (but only major).  */
 455 #define ASM_MMACOSX_VERSION_MIN_SPEC \
 456   " %{asm_macosx_version_min=*: -mmacosx-version-min=%*} %<asm_macosx_version_min=*"
 457 #else
 458 #define ASM_MMACOSX_VERSION_MIN_SPEC " %<asm_macosx_version_min=*"
 459 #endif
 460
 461 /* When we detect that we're cctools or llvm as, we need to insert the right
 462    additional options.  */
 463 #if HAVE_GNU_AS
 464 #define ASM_OPTIONS ""
 465 #else
 466 #define ASM_OPTIONS "%{v} %{w:-W} %{I*}"
 467 #endif
 468
 469 /* Default Darwin ASM_SPEC, very simple. */
 470 #define ASM_SPEC "-arch %(darwin_arch) \
 471   " ASM_OPTIONS " \
 472   %{Zforce_cpusubtype_ALL:-force_cpusubtype_ALL} \
 473   %{static}" ASM_MMACOSX_VERSION_MIN_SPEC
 474
 475 /* Default ASM_DEBUG_SPEC.  Darwin's as cannot currently produce dwarf
 476    debugging data.  */
 477
 478 #define ASM_DEBUG_SPEC  "%{g*:%{%:debug-level-gt(0):%{!gdwarf*:--gstabs}}}"
 479 #define ASM_FINAL_SPEC \
 480   "%{gsplit-dwarf:%ngsplit-dwarf is not supported on this platform} %<gsplit-dwarf"
 481
 482 /* We still allow output of STABS if the assembler supports it.  */
 483 #ifdef HAVE_AS_STABS_DIRECTIVE
 484 #define DBX_DEBUGGING_INFO 1
 485 #define PREFERRED_DEBUGGING_TYPE DBX_DEBUG
 486 #endif
 487
 488 #define DWARF2_DEBUGGING_INFO 1
 489
 490 #define DEBUG_FRAME_SECTION       "__DWARF,__debug_frame,regular,debug"
 491 #define DEBUG_INFO_SECTION        "__DWARF,__debug_info,regular,debug"
 492 #define DEBUG_ABBREV_SECTION      "__DWARF,__debug_abbrev,regular,debug"
 493 #define DEBUG_ARANGES_SECTION     "__DWARF,__debug_aranges,regular,debug"
 494 #define DEBUG_MACINFO_SECTION     "__DWARF,__debug_macinfo,regular,debug"
 495 #define DEBUG_LINE_SECTION        "__DWARF,__debug_line,regular,debug"
 496 #define DEBUG_LOC_SECTION         "__DWARF,__debug_loc,regular,debug"
 497 #define DEBUG_LOCLISTS_SECTION    "__DWARF,__debug_loclists,regular,debug"
 498
 499 #define DEBUG_STR_SECTION         "__DWARF,__debug_str,regular,debug"
 500 #define DEBUG_STR_OFFSETS_SECTION "__DWARF,__debug_str_offs,regular,debug"
 501 #define DEBUG_RANGES_SECTION      "__DWARF,__debug_ranges,regular,debug"
 502 #define DEBUG_RNGLISTS_SECTION    "__DWARF,__debug_rnglists,regular,debug"
 503 #define DEBUG_MACRO_SECTION       "__DWARF,__debug_macro,regular,debug"
 504
 505 #define DEBUG_LTO_INFO_SECTION    "__GNU_DWARF_LTO,__debug_info,regular,debug"
 506 #define DEBUG_LTO_ABBREV_SECTION  "__GNU_DWARF_LTO,__debug_abbrev,regular,debug"
 507 #define DEBUG_LTO_MACINFO_SECTION "__GNU_DWARF_LTO,__debug_macinfo,regular,debug"
 508 #define DEBUG_LTO_LINE_SECTION    "__GNU_DWARF_LTO,__debug_line,regular,debug"
 509 #define DEBUG_LTO_STR_SECTION     "__GNU_DWARF_LTO,__debug_str,regular,debug"
 510 #define DEBUG_LTO_MACRO_SECTION   "__GNU_DWARF_LTO,__debug_macro,regular,debug"
 511
 512 #define TARGET_WANT_DEBUG_PUB_SECTIONS true
 513 #define DEBUG_PUBNAMES_SECTION   ((debug_generate_pub_sections == 2) \
 514                                ? "__DWARF,__debug_gnu_pubn,regular,debug" \
 515                                : "__DWARF,__debug_pubnames,regular,debug")
 516
 517 #define DEBUG_PUBTYPES_SECTION   ((debug_generate_pub_sections == 2) \
 518                                ? "__DWARF,__debug_gnu_pubt,regular,debug" \
 519                                : "__DWARF,__debug_pubtypes,regular,debug")
 520
 521 /* When generating stabs debugging, use N_BINCL entries.  */
 522
 523 #define DBX_USE_BINCL
 524
 525 /* There is no limit to the length of stabs strings.  */
 526
 527 #define DBX_CONTIN_LENGTH 0
 528
 529 /* gdb needs a null N_SO at the end of each file for scattered loading.  */
 530
 531 #define DBX_OUTPUT_NULL_N_SO_AT_MAIN_SOURCE_FILE_END
 532
 533 /* GCC's definition of 'one_only' is the same as its definition of 'weak'.  */
 534 #define MAKE_DECL_ONE_ONLY(DECL) (DECL_WEAK (DECL) = 1)
 535
 536 /* Mach-O supports 'weak imports', and 'weak definitions' in coalesced
 537    sections.  machopic_select_section ensures that weak variables go in
 538    coalesced sections.  Weak aliases (or any other kind of aliases) are
 539    not supported.  Weak symbols that aren't visible outside the .s file
 540    are not supported.  */
 541 #define ASM_WEAKEN_DECL(FILE, DECL, NAME, ALIAS)                        \
 542   do {                                                                  \
 543     if (ALIAS)                                                          \
 544       {                                                                 \
 545         warning (0, "alias definitions not supported in Mach-O; ignored");      \
 546         break;                                                          \
 547       }                                                                 \
 548                                                                         \
 549     if (! DECL_EXTERNAL (DECL) && TREE_PUBLIC (DECL))                   \
 550       targetm.asm_out.globalize_label (FILE, NAME);                     \
 551     if (DECL_EXTERNAL (DECL))                                           \
 552       fputs ("\t.weak_reference ", FILE);                               \
 553     else if (lookup_attribute ("weak_import", DECL_ATTRIBUTES (DECL)))  \
 554       break;                                                            \
 555     else if (TREE_PUBLIC (DECL))                                        \
 556       fputs ("\t.weak_definition ", FILE);                              \
 557     else                                                                \
 558       break;                                                            \
 559     assemble_name (FILE, NAME);                                         \
 560     fputc ('\n', FILE);                                                 \
 561   } while (0)
 562
 563 /* Darwin has the pthread routines in libSystem, which every program
 564    links to, so there's no need for weak-ness for that.  */
 565 #define GTHREAD_USE_WEAK 0
 566
 567 /* On Darwin, we don't (at the time of writing) have linkonce sections
 568    with names, so it's safe to make the class data not comdat.  */
 569 #define TARGET_CXX_CLASS_DATA_ALWAYS_COMDAT hook_bool_void_false
 570
 571 /* For efficiency, on Darwin the RTTI information that is always
 572    emitted in the standard C++ library should not be COMDAT.  */
 573 #define TARGET_CXX_LIBRARY_RTTI_COMDAT hook_bool_void_false
 574
 575 /* We make exception information linkonce. */
 576 #undef TARGET_USES_WEAK_UNWIND_INFO
 577 #define TARGET_USES_WEAK_UNWIND_INFO 1
 578
 579 /* We need to use a nonlocal label for the start of an EH frame: the
 580    Darwin linker requires that a coalesced section start with a label.
 581    Unfortunately, it also requires that 'debug' sections don't contain
 582    labels.  */
 583 #undef FRAME_BEGIN_LABEL
 584 #define FRAME_BEGIN_LABEL (for_eh ? "EH_frame" : "Lframe")
 585
 586 /* Emit a label for the FDE corresponding to DECL.  EMPTY means
 587    emit a label for an empty FDE. */
 588 #define TARGET_ASM_EMIT_UNWIND_LABEL darwin_emit_unwind_label
 589
 590 /* Emit a label to separate the exception table.  */
 591 #define TARGET_ASM_EMIT_EXCEPT_TABLE_LABEL darwin_emit_except_table_label
 592
 593 /* Our profiling scheme doesn't LP labels and counter words.  */
 594
 595 #define NO_PROFILE_COUNTERS     1
 596
 597 #undef  INIT_SECTION_ASM_OP
 598 #define INIT_SECTION_ASM_OP ""
 599
 600 #undef  INVOKE__main
 601
 602 #define TARGET_ASM_CONSTRUCTOR  machopic_asm_out_constructor
 603 #define TARGET_ASM_DESTRUCTOR   machopic_asm_out_destructor
 604
 605 /* Always prefix with an underscore.  */
 606
 607 #define USER_LABEL_PREFIX "_"
 608
 609 /* A dummy symbol that will be replaced with the function base name.  */
 610 #define MACHOPIC_FUNCTION_BASE_NAME "<pic base>"
 611
 612 /* Don't output a .file directive.  That is only used by the assembler for
 613    error reporting.  */
 614 #undef  TARGET_ASM_FILE_START_FILE_DIRECTIVE
 615 #define TARGET_ASM_FILE_START_FILE_DIRECTIVE false
 616
 617 #undef  TARGET_ASM_FILE_END
 618 #define TARGET_ASM_FILE_END darwin_file_end
 619
 620 /* Because Mach-O relocations have a counter from 1 to 255 for the
 621    section number they apply to, it is necessary to output all
 622    normal sections before the LTO sections, to make sure that the
 623    sections that may have relocations always have a section number
 624    smaller than 255.  */
 625 #undef  TARGET_ASM_LTO_START
 626 #define TARGET_ASM_LTO_START darwin_asm_lto_start
 627 #undef  TARGET_ASM_LTO_END
 628 #define TARGET_ASM_LTO_END darwin_asm_lto_end
 629
 630 #define ASM_OUTPUT_SKIP(FILE,SIZE)  \
 631   fprintf (FILE, "\t.space " HOST_WIDE_INT_PRINT_UNSIGNED"\n", SIZE)
 632
 633 /* Give ObjC methods pretty symbol names.  */
 634
 635 #undef  OBJC_GEN_METHOD_LABEL
 636 #define OBJC_GEN_METHOD_LABEL(BUF,IS_INST,CLASS_NAME,CAT_NAME,SEL_NAME,NUM) \
 637   do { if (CAT_NAME)                                                    \
 638          sprintf (BUF, "%c[%s(%s) %s]", (IS_INST) ? '-' : '+',          \
 639                   (CLASS_NAME), (CAT_NAME), (SEL_NAME));                \
 640        else                                                             \
 641          sprintf (BUF, "%c[%s %s]", (IS_INST) ? '-' : '+',              \
 642                   (CLASS_NAME), (SEL_NAME));                            \
 643      } while (0)
 644
 645 #undef ASM_DECLARE_OBJECT_NAME
 646 #define ASM_DECLARE_OBJECT_NAME(FILE, NAME, DECL) \
 647         darwin_asm_declare_object_name ((FILE), (NAME), (DECL))
 648
 649 /* The RTTI data (e.g., __ti4name) is common and public (and static),
 650    but it does need to be referenced via indirect PIC data pointers.
 651    The machopic_define_symbol calls are telling the machopic subsystem
 652    that the name *is* defined in this module, so it doesn't need to
 653    make them indirect.  */
 654
 655 #define ASM_DECLARE_FUNCTION_NAME(FILE, NAME, DECL)                     \
 656   do {                                                                  \
 657     const char *xname = NAME;                                           \
 658     if (GET_CODE (XEXP (DECL_RTL (DECL), 0)) != SYMBOL_REF)             \
 659       xname = IDENTIFIER_POINTER (DECL_NAME (DECL));                    \
 660     if (! DECL_WEAK (DECL)                                              \
 661         && ((TREE_STATIC (DECL)                                         \
 662              && (!DECL_COMMON (DECL) || !TREE_PUBLIC (DECL)))           \
 663             || DECL_INITIAL (DECL)))                                    \
 664         machopic_define_symbol (DECL_RTL (DECL));                       \
 665     if ((TREE_STATIC (DECL)                                             \
 666          && (!DECL_COMMON (DECL) || !TREE_PUBLIC (DECL)))               \
 667         || DECL_INITIAL (DECL))                                         \
 668       (* targetm.encode_section_info) (DECL, DECL_RTL (DECL), false);   \
 669     ASM_OUTPUT_FUNCTION_LABEL (FILE, xname, DECL);                      \
 670   } while (0)
 671
 672 #undef TARGET_ASM_DECLARE_CONSTANT_NAME
 673 #define TARGET_ASM_DECLARE_CONSTANT_NAME darwin_asm_declare_constant_name
 674
 675 /* Wrap new method names in quotes so the assembler doesn't gag.
 676    Make Objective-C internal symbols local and in doing this, we need
 677    to accommodate the name mangling done by c++ on file scope locals.  */
 678
 679 int darwin_label_is_anonymous_local_objc_name (const char *name);
 680
 681 #undef  ASM_OUTPUT_LABELREF
 682 #define ASM_OUTPUT_LABELREF(FILE,NAME)                                       \
 683   do {                                                                       \
 684        const char *xname = (NAME);                                           \
 685        if (! strcmp (xname, MACHOPIC_FUNCTION_BASE_NAME))                    \
 686          machopic_output_function_base_name(FILE);                           \
 687        else if (xname[0] == '&' || xname[0] == '*')                          \
 688          {                                                                   \
 689            int len = strlen (xname);                                         \
 690            if (len > 6 && !strcmp ("$stub", xname + len - 5))                \
 691              machopic_validate_stub_or_non_lazy_ptr (xname);                 \
 692            else if (len > 7 && !strcmp ("$stub\"", xname + len - 6))         \
 693              machopic_validate_stub_or_non_lazy_ptr (xname);                 \
 694            else if (len > 14 && !strcmp ("$non_lazy_ptr", xname + len - 13)) \
 695              machopic_validate_stub_or_non_lazy_ptr (xname);                 \
 696            else if (len > 15 && !strcmp ("$non_lazy_ptr\"", xname + len - 14)) \
 697              machopic_validate_stub_or_non_lazy_ptr (xname);                 \
 698            if (xname[1] != '"' && name_needs_quotes (&xname[1]))             \
 699              fprintf (FILE, "\"%s\"", &xname[1]);                            \
 700            else                                                              \
 701              fputs (&xname[1], FILE);                                        \
 702          }                                                                   \
 703        else if (xname[0] == '+' || xname[0] == '-')                          \
 704          fprintf (FILE, "\"%s\"", xname);                                    \
 705        else if (darwin_label_is_anonymous_local_objc_name (xname))           \
 706          fprintf (FILE, "L%s", xname);                                       \
 707        else if (xname[0] != '"' && name_needs_quotes (xname))                \
 708          asm_fprintf (FILE, "\"%U%s\"", xname);                              \
 709        else                                                                  \
 710          asm_fprintf (FILE, "%U%s", xname);                                  \
 711   } while (0)
 712
 713 /* Output before executable code.  */
 714 #undef TEXT_SECTION_ASM_OP
 715 #define TEXT_SECTION_ASM_OP "\t.text"
 716
 717 /* Output before writable data.  */
 718
 719 #undef DATA_SECTION_ASM_OP
 720 #define DATA_SECTION_ASM_OP "\t.data"
 721
 722 #undef  ALIGN_ASM_OP
 723 #define ALIGN_ASM_OP            ".align"
 724
 725 #undef  ASM_OUTPUT_ALIGN
 726 #define ASM_OUTPUT_ALIGN(FILE,LOG)      \
 727   if ((LOG) != 0)                       \
 728     fprintf (FILE, "\t%s\t%d\n", ALIGN_ASM_OP, (LOG))
 729
 730 /* The maximum alignment which the object file format can support in
 731    bits.  For Mach-O, this is 2^15 bytes.  */
 732
 733 #undef  MAX_OFILE_ALIGNMENT
 734 #define MAX_OFILE_ALIGNMENT (0x8000 * 8)
 735
 736 #define L2_MAX_OFILE_ALIGNMENT 15
 737
 738 /*  These are the three variants that emit referenced blank space.  */
 739 #define ASM_OUTPUT_ALIGNED_BSS(FILE, DECL, NAME, SIZE, ALIGN)           \
 740         darwin_output_aligned_bss ((FILE), (DECL), (NAME), (SIZE), (ALIGN))
 741
 742 #undef  ASM_OUTPUT_ALIGNED_DECL_LOCAL
 743 #define ASM_OUTPUT_ALIGNED_DECL_LOCAL(FILE, DECL, NAME, SIZE, ALIGN)    \
 744         darwin_asm_output_aligned_decl_local                            \
 745                                   ((FILE), (DECL), (NAME), (SIZE), (ALIGN))
 746
 747 #undef  ASM_OUTPUT_ALIGNED_DECL_COMMON
 748 #define ASM_OUTPUT_ALIGNED_DECL_COMMON(FILE, DECL, NAME, SIZE, ALIGN)   \
 749         darwin_asm_output_aligned_decl_common                           \
 750                                    ((FILE), (DECL), (NAME), (SIZE), (ALIGN))
 751
 752 /* The generic version, archs should over-ride where required.  */
 753 #define MACHOPIC_NL_SYMBOL_PTR_SECTION ".non_lazy_symbol_pointer"
 754
 755 /* Declare the section variables.  */
 756 #ifndef USED_FOR_TARGET
 757 enum darwin_section_enum {
 758 #define DEF_SECTION(NAME, FLAGS, DIRECTIVE, OBJC) NAME,
 759 #include "darwin-sections.def"
 760 #undef DEF_SECTION
 761   NUM_DARWIN_SECTIONS
 762 };
 763 extern GTY(()) section * darwin_sections[NUM_DARWIN_SECTIONS];
 764 #endif
 765
 766 #undef  TARGET_ASM_SELECT_SECTION
 767 #define TARGET_ASM_SELECT_SECTION machopic_select_section
 768
 769 #undef  TARGET_ASM_FUNCTION_SECTION
 770 #define TARGET_ASM_FUNCTION_SECTION darwin_function_section
 771
 772 #undef  TARGET_ASM_SELECT_RTX_SECTION
 773 #define TARGET_ASM_SELECT_RTX_SECTION machopic_select_rtx_section
 774 #undef  TARGET_ASM_UNIQUE_SECTION
 775 #define TARGET_ASM_UNIQUE_SECTION darwin_unique_section
 776 #undef  TARGET_ASM_FUNCTION_RODATA_SECTION
 777 #define TARGET_ASM_FUNCTION_RODATA_SECTION default_no_function_rodata_section
 778
 779 #undef  TARGET_ASM_TM_CLONE_TABLE_SECTION
 780 #define TARGET_ASM_TM_CLONE_TABLE_SECTION darwin_tm_clone_table_section
 781
 782 #undef  TARGET_ASM_RELOC_RW_MASK
 783 #define TARGET_ASM_RELOC_RW_MASK machopic_reloc_rw_mask
 784
 785 /* Globalizing directive for a label.  */
 786 #define GLOBAL_ASM_OP "\t.globl "
 787 #define TARGET_ASM_GLOBALIZE_LABEL darwin_globalize_label
 788
 789 /* Emit an assembler directive to set visibility for a symbol.  Used
 790    to support visibility attribute and Darwin's private extern
 791    feature.  */
 792 #undef TARGET_ASM_ASSEMBLE_VISIBILITY
 793 #define TARGET_ASM_ASSEMBLE_VISIBILITY darwin_assemble_visibility
 794
 795 /* Extra attributes for Darwin.  */
 796 #define SUBTARGET_ATTRIBUTE_TABLE                                            \
 797   /* { name, min_len, max_len, decl_req, type_req, fn_type_req,              \
 798        affects_type_identity, handler, exclude } */                          \
 799   { "apple_kext_compatibility", 0, 0, false, true, false, false,             \
 800     darwin_handle_kext_attribute, NULL },                                    \
 801   { "weak_import", 0, 0, true, false, false, false,                          \
 802     darwin_handle_weak_import_attribute, NULL }
 803
 804 /* Make local constant labels linker-visible, so that if one follows a
 805    weak_global constant, ld64 will be able to separate the atoms.  */
 806 #undef ASM_GENERATE_INTERNAL_LABEL
 807 #define ASM_GENERATE_INTERNAL_LABEL(LABEL,PREFIX,NUM)   \
 808   do {                                                  \
 809     if (strcmp ("LC", PREFIX) == 0)                     \
 810       sprintf (LABEL, "*%s%ld", "lC", (long)(NUM));     \
 811     else                                                \
 812       sprintf (LABEL, "*%s%ld", PREFIX, (long)(NUM));   \
 813   } while (0)
 814
 815 #undef TARGET_ASM_MARK_DECL_PRESERVED
 816 #define TARGET_ASM_MARK_DECL_PRESERVED darwin_mark_decl_preserved
 817
 818 /* Any port using this header needs to define the first available
 819    subtarget symbol bit: SYMBOL_FLAG_SUBT_DEP.  */
 820
 821 /* Is a variable. */
 822 #define MACHO_SYMBOL_FLAG_VARIABLE (SYMBOL_FLAG_SUBT_DEP)
 823 #define MACHO_SYMBOL_VARIABLE_P(RTX) \
 824   ((SYMBOL_REF_FLAGS (RTX) & MACHO_SYMBOL_FLAG_VARIABLE) != 0)
 825
 826 /* Set on a symbol that must be indirected, even when there is a
 827    definition in the TU.  The ABI mandates that common symbols are so
 828    indirected, as are weak.  If 'fix-and-continue' is operational then
 829    data symbols might also be.  */
 830
 831 #define MACHO_SYMBOL_FLAG_MUST_INDIRECT ((SYMBOL_FLAG_SUBT_DEP) << 1)
 832 #define MACHO_SYMBOL_MUST_INDIRECT_P(RTX) \
 833   ((SYMBOL_REF_FLAGS (RTX) & MACHO_SYMBOL_FLAG_MUST_INDIRECT) != 0)
 834
 835 /* Set on a symbol with SYMBOL_FLAG_FUNCTION or MACHO_SYMBOL_FLAG_VARIABLE
 836    to indicate that the function or variable is considered defined in this
 837    translation unit.  */
 838
 839 #define MACHO_SYMBOL_FLAG_DEFINED ((SYMBOL_FLAG_SUBT_DEP) << 2)
 840 #define MACHO_SYMBOL_DEFINED_P(RTX) \
 841   ((SYMBOL_REF_FLAGS (RTX) & MACHO_SYMBOL_FLAG_DEFINED) != 0)
 842
 843 /* Set on a symbol that has specified non-default visibility.  */
 844
 845 #define MACHO_SYMBOL_FLAG_HIDDEN_VIS ((SYMBOL_FLAG_SUBT_DEP) << 3)
 846 #define MACHO_SYMBOL_HIDDEN_VIS_P(RTX) \
 847   ((SYMBOL_REF_FLAGS (RTX) & MACHO_SYMBOL_FLAG_HIDDEN_VIS) != 0)
 848
 849 /* Set on a symbol that should be made visible to the linker (overriding
 850    'L' symbol prefixes).  */
 851
 852 #define MACHO_SYMBOL_FLAG_LINKER_VIS ((SYMBOL_FLAG_SUBT_DEP) << 4)
 853 #define MACHO_SYMBOL_LINKER_VIS_P(RTX) \
 854   ((SYMBOL_REF_FLAGS (RTX) & MACHO_SYMBOL_FLAG_LINKER_VIS) != 0)
 855
 856 /* Set on a symbol that is a pic stub or symbol indirection (i.e. the
 857    L_xxxxx${stub,non_lazy_ptr,lazy_ptr}.  */
 858
 859 #define MACHO_SYMBOL_FLAG_INDIRECTION ((SYMBOL_FLAG_SUBT_DEP) << 5)
 860 #define MACHO_SYMBOL_INDIRECTION_P(RTX) \
 861   ((SYMBOL_REF_FLAGS (RTX) & MACHO_SYMBOL_FLAG_INDIRECTION) != 0)
 862
 863 /* Set on a symbol to indicate when fix-and-continue style code
 864    generation is being used and the symbol refers to a static symbol
 865    that should be rebound from new instances of a translation unit to
 866    the original instance of the data.  */
 867
 868 #define MACHO_SYMBOL_FLAG_STATIC ((SYMBOL_FLAG_SUBT_DEP) << 6)
 869 #define MACHO_SYMBOL_STATIC_P(RTX) \
 870   ((SYMBOL_REF_FLAGS (RTX) & MACHO_SYMBOL_FLAG_STATIC) != 0)
 871
 872 /* Symbolic names for various things we might know about a symbol.  */
 873
 874 enum machopic_addr_class {
 875   MACHOPIC_UNDEFINED,
 876   MACHOPIC_DEFINED_DATA,
 877   MACHOPIC_UNDEFINED_DATA,
 878   MACHOPIC_DEFINED_FUNCTION,
 879   MACHOPIC_UNDEFINED_FUNCTION
 880 };
 881
 882 /* Macros defining the various PIC cases.  */
 883
 884 #undef  MACHO_DYNAMIC_NO_PIC_P
 885 #define MACHO_DYNAMIC_NO_PIC_P  (TARGET_MACHO_DYNAMIC_NO_PIC)
 886 #undef  MACHOPIC_INDIRECT
 887 #define MACHOPIC_INDIRECT       (flag_pic || MACHO_DYNAMIC_NO_PIC_P)
 888 #define MACHOPIC_JUST_INDIRECT  (MACHO_DYNAMIC_NO_PIC_P)
 889 #undef  MACHOPIC_PURE
 890 #define MACHOPIC_PURE           (flag_pic && ! MACHO_DYNAMIC_NO_PIC_P)
 891
 892 #undef TARGET_ENCODE_SECTION_INFO
 893 #define TARGET_ENCODE_SECTION_INFO  darwin_encode_section_info
 894 #undef TARGET_STRIP_NAME_ENCODING
 895 #define TARGET_STRIP_NAME_ENCODING  default_strip_name_encoding
 896
 897 #define GEN_BINDER_NAME_FOR_STUB(BUF,STUB,STUB_LENGTH)          \
 898   do {                                                          \
 899     const char *const stub_ = (STUB);                           \
 900     char *buffer_ = (BUF);                                      \
 901     strcpy (buffer_, stub_);                                    \
 902     if (stub_[0] == '"')                                        \
 903       {                                                         \
 904         strcpy (buffer_ + (STUB_LENGTH) - 1, "_binder\"");      \
 905       }                                                         \
 906     else                                                        \
 907       {                                                         \
 908         strcpy (buffer_ + (STUB_LENGTH), "_binder");            \
 909       }                                                         \
 910   } while (0)
 911
 912 #define GEN_SYMBOL_NAME_FOR_SYMBOL(BUF,SYMBOL,SYMBOL_LENGTH)    \
 913   do {                                                          \
 914     const char *const symbol_ = (SYMBOL);                       \
 915     char *buffer_ = (BUF);                                      \
 916     if (name_needs_quotes (symbol_) && symbol_[0] != '"')       \
 917       {                                                         \
 918           sprintf (buffer_, "\"%s\"", symbol_);                 \
 919       }                                                         \
 920     else                                                        \
 921       {                                                         \
 922         strcpy (buffer_, symbol_);                              \
 923       }                                                         \
 924   } while (0)
 925
 926 /* Given a symbol name string, create the lazy pointer version
 927    of the symbol name.  */
 928
 929 #define GEN_LAZY_PTR_NAME_FOR_SYMBOL(BUF,SYMBOL,SYMBOL_LENGTH)  \
 930   do {                                                          \
 931     const char *symbol_ = (SYMBOL);                             \
 932     char *buffer_ = (BUF);                                      \
 933     if (symbol_[0] == '"')                                      \
 934       {                                                         \
 935         strcpy (buffer_, "\"L");                                \
 936         strcpy (buffer_ + 2, symbol_ + 1);                      \
 937         strcpy (buffer_ + (SYMBOL_LENGTH), "$lazy_ptr\"");      \
 938       }                                                         \
 939     else if (name_needs_quotes (symbol_))                       \
 940       {                                                         \
 941         strcpy (buffer_, "\"L");                                \
 942         strcpy (buffer_ + 2, symbol_);                          \
 943         strcpy (buffer_ + (SYMBOL_LENGTH) + 2, "$lazy_ptr\"");  \
 944       }                                                         \
 945     else                                                        \
 946       {                                                         \
 947         strcpy (buffer_, "L");                                  \
 948         strcpy (buffer_ + 1, symbol_);                          \
 949         strcpy (buffer_ + (SYMBOL_LENGTH) + 1, "$lazy_ptr");    \
 950       }                                                         \
 951   } while (0)
 952
 953 #define EH_FRAME_SECTION_NAME   "__TEXT"
 954 #define EH_FRAME_SECTION_ATTR ",coalesced,no_toc+strip_static_syms+live_support"
 955
 956 #undef ASM_PREFERRED_EH_DATA_FORMAT
 957 #define ASM_PREFERRED_EH_DATA_FORMAT(CODE,GLOBAL)  \
 958   (((CODE) == 2 && (GLOBAL) == 1) \
 959    ? (DW_EH_PE_pcrel | DW_EH_PE_indirect | DW_EH_PE_sdata4) : \
 960      ((CODE) == 1 || (GLOBAL) == 0) ? DW_EH_PE_pcrel : DW_EH_PE_absptr)
 961
 962 #define ASM_OUTPUT_DWARF_DELTA(FILE,SIZE,LABEL1,LABEL2)  \
 963   darwin_asm_output_dwarf_delta (FILE, SIZE, LABEL1, LABEL2, 0)
 964
 965 #define ASM_OUTPUT_DWARF_OFFSET(FILE,SIZE,LABEL,OFFSET,BASE)  \
 966   darwin_asm_output_dwarf_offset (FILE, SIZE, LABEL, OFFSET, BASE)
 967
 968 #define ASM_MAYBE_OUTPUT_ENCODED_ADDR_RTX(ASM_OUT_FILE, ENCODING, SIZE, ADDR, DONE)     \
 969       if (ENCODING == ASM_PREFERRED_EH_DATA_FORMAT (2, 1)) {                            \
 970         darwin_non_lazy_pcrel (ASM_OUT_FILE, ADDR);                                     \
 971         goto DONE;                                                                      \
 972       }
 973
 974 /* Experimentally, putting jump tables in text is faster on SPEC.
 975    Also this is needed for correctness for coalesced functions.  */
 976
 977 #ifndef JUMP_TABLES_IN_TEXT_SECTION
 978 #define JUMP_TABLES_IN_TEXT_SECTION 1
 979 #endif
 980
 981 #define TARGET_TERMINATE_DW2_EH_FRAME_INFO false
 982
 983 #define TARGET_ASM_INIT_SECTIONS darwin_init_sections
 984 #undef TARGET_ASM_NAMED_SECTION
 985 #define TARGET_ASM_NAMED_SECTION darwin_asm_named_section
 986
 987 #define DARWIN_REGISTER_TARGET_PRAGMAS()                        \
 988   do {                                                          \
 989     if (!flag_preprocess_only)                                  \
 990       cpp_register_pragma (parse_in, NULL, "mark",              \
 991                            darwin_pragma_ignore, false);        \
 992     c_register_pragma (0, "options", darwin_pragma_options);    \
 993     c_register_pragma (0, "segment", darwin_pragma_ignore);     \
 994     c_register_pragma (0, "unused", darwin_pragma_unused);      \
 995     c_register_pragma (0, "ms_struct", darwin_pragma_ms_struct); \
 996   } while (0)
 997
 998 #undef ASM_APP_ON
 999 #define ASM_APP_ON ""
1000 #undef ASM_APP_OFF
1001 #define ASM_APP_OFF ""
1002
1003 void darwin_register_frameworks (const char *, const char *, int);
1004 void darwin_register_objc_includes (const char *, const char *, int);
1005 #define TARGET_EXTRA_PRE_INCLUDES darwin_register_objc_includes
1006 #define TARGET_EXTRA_INCLUDES darwin_register_frameworks
1007
1008 void add_framework_path (char *);
1009 #define TARGET_OPTF add_framework_path
1010
1011 #define TARGET_POSIX_IO
1012
1013 #define WINT_TYPE "int"
1014
1015 /* Every program on darwin links against libSystem which contains the pthread
1016    routines, so there's no need to explicitly call out when doing threaded
1017    work.  */
1018
1019 #undef GOMP_SELF_SPECS
1020 #define GOMP_SELF_SPECS ""
1021 #undef GTM_SELF_SPECS
1022 #define GTM_SELF_SPECS ""
1023
1024 /* Darwin disables section anchors by default.
1025    They should be enabled per arch where support exists in that arch.  */
1026 #define TARGET_ASM_OUTPUT_ANCHOR NULL
1027 #define DARWIN_SECTION_ANCHORS 0
1028
1029 #define HAVE_ENABLE_EXECUTE_STACK
1030
1031 /* For Apple KEXTs, we make the constructors return this to match gcc
1032    2.95.  */
1033 #define TARGET_CXX_CDTOR_RETURNS_THIS (darwin_kextabi_p)
1034 #define TARGET_KEXTABI flag_apple_kext
1035
1036 /* We have target-specific builtins.  */
1037 #define SUBTARGET_FOLD_BUILTIN darwin_fold_builtin
1038
1039 #define TARGET_N_FORMAT_TYPES 1
1040 #define TARGET_FORMAT_TYPES darwin_additional_format_types
1041
1042 #ifndef USED_FOR_TARGET
1043 extern void darwin_driver_init (unsigned int *,struct cl_decoded_option **);
1044 #define GCC_DRIVER_HOST_INITIALIZATION \
1045   darwin_driver_init (&decoded_options_count, &decoded_options)
1046 #endif
1047
1048 /* The Apple assembler and linker do not support constructor priorities.  */
1049 #undef SUPPORTS_INIT_PRIORITY
1050 #define SUPPORTS_INIT_PRIORITY 0
1051
1052 /* When building cross-compilers (and native crosses) we shall default to
1053    providing an osx-version-min of this unless overridden by the User.
1054    10.5 is the only version that fully supports all our archs so that's the
1055    fall-back default.  */
1056 #define DEF_MIN_OSX_VERSION "10.5"
1057
1058 /* Later versions of ld64 support coalescing weak code/data without requiring
1059    that they be placed in specially identified sections.  This is the earliest
1060    _tested_ version known to support this so far.  */
1061 #define MIN_LD64_NO_COAL_SECTS "236.4"
1062
1063 /* From at least version 62.1, ld64 can build symbol indirection stubs as
1064    needed, and there is no need for the compiler to emit them.  */
1065 #define MIN_LD64_OMIT_STUBS "62.1"
1066
1067 #ifndef LD64_VERSION
1068 #define LD64_VERSION "62.1"
1069 #else
1070 #define DEF_LD64 LD64_VERSION
1071 #endif
1072
1073 #endif /* CONFIG_DARWIN_H */