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1 /* Target definitions for Darwin (Mac OS X) systems.
2 Copyright (C) 1989-2018 Free Software Foundation, Inc.
3 Contributed by Apple Computer Inc.
5 This file is part of GCC.
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.
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.
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.
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/>. */
26 #ifndef CONFIG_DARWIN_H
27 #define CONFIG_DARWIN_H
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. */
36 /* Although NeXT ran on many different architectures, as of Jan 2001
37 the only supported Darwin targets are PowerPC and x86. */
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. */
43 #define DARWIN_X86 0
44 #define DARWIN_PPC 0
46 /* Suppress g++ attempt to link in the math library automatically. */
47 #define MATH_LIBRARY ""
49 /* We have atexit. */
51 #define HAVE_ATEXIT
53 /* Define an empty body for the function do_global_dtors() in libgcc2.c. */
55 #define DO_GLOBAL_DTORS_BODY
57 /* The string value for __SIZE_TYPE__. */
59 #ifndef SIZE_TYPE
60 #define SIZE_TYPE "long unsigned int"
61 #endif
63 /* Type used for ptrdiff_t, as a string used in a declaration. */
65 #undef PTRDIFF_TYPE
66 #define PTRDIFF_TYPE "int"
68 /* wchar_t is int. */
70 #undef WCHAR_TYPE
71 #define WCHAR_TYPE "int"
72 #undef WCHAR_TYPE_SIZE
73 #define WCHAR_TYPE_SIZE 32
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"
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"
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"
102 #define INTPTR_TYPE "long int"
103 #define UINTPTR_TYPE "long unsigned int"
105 #define SIG_ATOMIC_TYPE "int"
107 /* Default to using the NeXT-style runtime, since that's what is
108 pre-installed on Darwin systems. */
110 #define NEXT_OBJC_RUNTIME 1
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. */
115 #undef DEFAULT_PCC_STRUCT_RETURN
116 #define DEFAULT_PCC_STRUCT_RETURN 0
118 /* True if pragma ms_struct is in effect. */
119 extern GTY(()) int darwin_ms_struct;
121 #define DRIVER_SELF_SPECS \
122 "%{gfull:-g -fno-eliminate-unused-debug-symbols} %<gfull", \
123 "%{gused:-g -feliminate-unused-debug-symbols} %<gused", \
124 "%{fapple-kext|mkernel:-static}", \
125 "%{shared:-Zdynamiclib} %<shared"
127 #define DARWIN_CC1_SPEC \
128 "%{findirect-virtual-calls: -fapple-kext} %<findirect-virtual-calls " \
129 "%{fterminated-vtables: -fapple-kext} %<fterminated-vtables " \
130 "%<filelist* %<framework*"
132 #define SUBSUBTARGET_OVERRIDE_OPTIONS \
133 do { \
134 darwin_override_options (); \
135 } while (0)
137 #define SUBTARGET_C_COMMON_OVERRIDE_OPTIONS do { \
138 if (flag_mkernel || flag_apple_kext) \
140 if (flag_use_cxa_atexit == 2) \
141 flag_use_cxa_atexit = 0; \
142 /* kexts should always be built without the coalesced sections \
143 because the kernel loader doesn't grok such sections. */ \
144 flag_weak = 0; \
145 /* No RTTI in kexts. */ \
146 flag_rtti = 0; \
148 } while (0)
150 /* Machine dependent cpp options. Don't add more options here, add
151 them to darwin_cpp_builtins in darwin-c.c. */
153 #undef CPP_SPEC
154 #define CPP_SPEC "%{static:%{!dynamic:-D__STATIC__}}%{!static:-D__DYNAMIC__}" \
155 " %{pthread:-D_REENTRANT}"
157 /* This is mostly a clone of the standard LINK_COMMAND_SPEC, plus
158 precomp, libtool, and fat build additions.
160 In general, random Darwin linker flags should go into LINK_SPEC
161 instead of LINK_COMMAND_SPEC. The command spec is better for
162 specifying the handling of options understood by generic Unix
163 linkers, and for positional arguments like libraries. */
165 #if LD64_HAS_EXPORT_DYNAMIC
166 #define DARWIN_EXPORT_DYNAMIC " %{rdynamic:-export_dynamic}"
167 #else
168 #define DARWIN_EXPORT_DYNAMIC " %{rdynamic: %nrdynamic is not supported}"
169 #endif
171 #define LINK_COMMAND_SPEC_A \
172 "%{!fdump=*:%{!fsyntax-only:%{!c:%{!M:%{!MM:%{!E:%{!S:\
173 %(linker)" \
174 LINK_PLUGIN_SPEC \
175 "%{flto*:%<fcompare-debug*} \
176 %{flto*} \
177 %l " LINK_COMPRESS_DEBUG_SPEC \
178 "%X %{s} %{t} %{Z} %{u*} \
179 %{e*} %{r} \
180 %{o*}%{!o:-o a.out} \
181 %{!nostdlib:%{!nostartfiles:%S}} \
182 %{L*} %(link_libgcc) %o %{fprofile-arcs|fprofile-generate*|coverage:-lgcov} \
183 %{fopenacc|fopenmp|%:gt(%{ftree-parallelize-loops=*:%*} 1): \
184 %{static|static-libgcc|static-libstdc++|static-libgfortran: libgomp.a%s; : -lgomp } } \
185 %{fgnu-tm: \
186 %{static|static-libgcc|static-libstdc++|static-libgfortran: libitm.a%s; : -litm } } \
187 %{!nostdlib:%{!nodefaultlibs:\
188 %{%:sanitize(address): -lasan } \
189 %{%:sanitize(undefined): -lubsan } \
190 %(link_ssp) \
191 " DARWIN_EXPORT_DYNAMIC " %<rdynamic \
192 %(link_gcc_c_sequence) \
194 %{!nostdlib:%{!nostartfiles:%E}} %{T*} %{F*} }}}}}}}"
196 #define DSYMUTIL "\ndsymutil"
198 #define DSYMUTIL_SPEC \
199 "%{!fdump=*:%{!fsyntax-only:%{!c:%{!M:%{!MM:%{!E:%{!S:\
200 %{v} \
201 %{gdwarf-2:%{!gstabs*:%{%:debug-level-gt(0): -idsym}}}\
202 %{.c|.cc|.C|.cpp|.cp|.c++|.cxx|.CPP|.m|.mm: \
203 %{gdwarf-2:%{!gstabs*:%{%:debug-level-gt(0): -dsym}}}}}}}}}}}"
205 #define LINK_COMMAND_SPEC LINK_COMMAND_SPEC_A DSYMUTIL_SPEC
207 /* Tell collect2 to run dsymutil for us as necessary. */
208 #define COLLECT_RUN_DSYMUTIL 1
210 /* We only want one instance of %G, since libSystem (Darwin's -lc) does not depend
211 on libgcc. */
212 #undef LINK_GCC_C_SEQUENCE_SPEC
213 #define LINK_GCC_C_SEQUENCE_SPEC "%G %L"
215 /* ld64 supports a sysroot, it just has a different name and there's no easy
216 way to check for it at config time. */
217 #undef HAVE_LD_SYSROOT
218 #define HAVE_LD_SYSROOT 1
219 /* It seems the only (working) way to get a space after %R is to append a
220 dangling '/'. */
221 #define SYSROOT_SPEC "%{!isysroot*:-syslibroot %R/ }"
223 /* Do the same as clang, for now, and insert the sysroot for ld when an
224 isysroot is specified. */
225 #define LINK_SYSROOT_SPEC "%{isysroot*:-syslibroot %*}"
227 /* Suppress the addition of extra prefix paths when a sysroot is in use. */
228 #define STANDARD_STARTFILE_PREFIX_1 ""
229 #define STANDARD_STARTFILE_PREFIX_2 ""
231 #define DARWIN_PIE_SPEC "%{fpie|pie|fPIE:}"
233 /* Please keep the random linker options in alphabetical order (modulo
234 'Z' and 'no' prefixes). Note that options taking arguments may appear
235 multiple times on a command line with different arguments each time,
236 so put a * after their names so all of them get passed. */
237 #define LINK_SPEC \
238 "%{static}%{!static:-dynamic} \
239 %:remove-outfile(-ldl) \
240 %:remove-outfile(-lm) \
241 %:remove-outfile(-lpthread) \
242 %{fgnu-runtime: %{static|static-libgcc: \
243 %:replace-outfile(-lobjc libobjc-gnu.a%s); \
244 :%:replace-outfile(-lobjc -lobjc-gnu ) } }\
245 %{static|static-libgcc|static-libgfortran:%:replace-outfile(-lgfortran libgfortran.a%s)}\
246 %{static|static-libgcc|static-libstdc++|static-libgfortran:%:replace-outfile(-lgomp libgomp.a%s)}\
247 %{static|static-libgcc|static-libstdc++:%:replace-outfile(-lstdc++ libstdc++.a%s)}\
248 %{!Zdynamiclib: \
249 %{Zforce_cpusubtype_ALL:-arch %(darwin_arch) -force_cpusubtype_ALL} \
250 %{!Zforce_cpusubtype_ALL:-arch %(darwin_subarch)} \
251 %{Zbundle:-bundle} \
252 %{Zbundle_loader*:-bundle_loader %*} \
253 %{client_name*} \
254 %{compatibility_version*:%e-compatibility_version only allowed with -dynamiclib\
256 %{current_version*:%e-current_version only allowed with -dynamiclib} \
257 %{Zforce_flat_namespace:-force_flat_namespace} \
258 %{Zinstall_name*:%e-install_name only allowed with -dynamiclib} \
259 %{keep_private_externs} \
260 %{private_bundle} \
262 %{Zdynamiclib: -dylib \
263 %{Zbundle:%e-bundle not allowed with -dynamiclib} \
264 %{Zbundle_loader*:%e-bundle_loader not allowed with -dynamiclib} \
265 %{client_name*:%e-client_name not allowed with -dynamiclib} \
266 %{compatibility_version*:-dylib_compatibility_version %*} \
267 %{current_version*:-dylib_current_version %*} \
268 %{Zforce_cpusubtype_ALL:-arch %(darwin_arch)} \
269 %{!Zforce_cpusubtype_ALL: -arch %(darwin_subarch)} \
270 %{Zforce_flat_namespace:%e-force_flat_namespace not allowed with -dynamiclib} \
271 %{Zinstall_name*:-dylib_install_name %*} \
272 %{keep_private_externs:%e-keep_private_externs not allowed with -dynamiclib} \
273 %{private_bundle:%e-private_bundle not allowed with -dynamiclib} \
275 %{Zall_load:-all_load} \
276 %{Zallowable_client*:-allowable_client %*} \
277 %{Zbind_at_load:-bind_at_load} \
278 %{Zarch_errors_fatal:-arch_errors_fatal} \
279 %{Zdead_strip:-dead_strip} \
280 %{Zno_dead_strip_inits_and_terms:-no_dead_strip_inits_and_terms} \
281 %{Zdylib_file*:-dylib_file %*} \
282 %{Zdynamic:-dynamic}\
283 %{Zexported_symbols_list*:-exported_symbols_list %*} \
284 %{Zflat_namespace:-flat_namespace} \
285 %{headerpad_max_install_names} \
286 %{Zimage_base*:-image_base %*} \
287 %{Zinit*:-init %*} \
288 %{mmacosx-version-min=*:-macosx_version_min %*} \
289 %{nomultidefs} \
290 %{Zmulti_module:-multi_module} %{Zsingle_module:-single_module} \
291 %{Zmultiply_defined*:-multiply_defined %*} \
292 %{!Zmultiply_defined*:%{shared-libgcc: \
293 %:version-compare(< 10.5 mmacosx-version-min= -multiply_defined) \
294 %:version-compare(< 10.5 mmacosx-version-min= suppress)}} \
295 %{Zmultiplydefinedunused*:-multiply_defined_unused %*} \
296 " DARWIN_PIE_SPEC " \
297 %{prebind} %{noprebind} %{nofixprebinding} %{prebind_all_twolevel_modules} \
298 %{read_only_relocs} \
299 %{sectcreate*} %{sectorder*} %{seg1addr*} %{segprot*} \
300 %{Zsegaddr*:-segaddr %*} \
301 %{Zsegs_read_only_addr*:-segs_read_only_addr %*} \
302 %{Zsegs_read_write_addr*:-segs_read_write_addr %*} \
303 %{Zseg_addr_table*: -seg_addr_table %*} \
304 %{Zfn_seg_addr_table_filename*:-seg_addr_table_filename %*} \
305 %{sub_library*} %{sub_umbrella*} \
306 " LINK_SYSROOT_SPEC " \
307 %{twolevel_namespace} %{twolevel_namespace_hints} \
308 %{Zumbrella*: -umbrella %*} \
309 %{undefined*} \
310 %{Zunexported_symbols_list*:-unexported_symbols_list %*} \
311 %{Zweak_reference_mismatches*:-weak_reference_mismatches %*} \
312 %{!Zweak_reference_mismatches*:-weak_reference_mismatches non-weak} \
313 %{X} \
314 %{y*} \
315 %{w} \
316 %{pagezero_size*} %{segs_read_*} %{seglinkedit} %{noseglinkedit} \
317 %{sectalign*} %{sectobjectsymbols*} %{segcreate*} %{whyload} \
318 %{whatsloaded} %{dylinker_install_name*} \
319 %{dylinker} %{Mach} "
322 /* Machine dependent libraries. */
324 #define LIB_SPEC "%{!static:-lSystem}"
326 /* Support -mmacosx-version-min by supplying different (stub) libgcc_s.dylib
327 libraries to link against, and by not linking against libgcc_s on
328 earlier-than-10.3.9.
330 Note that by default, -lgcc_eh is not linked against! This is
331 because in a future version of Darwin the EH frame information may
332 be in a new format, or the fallback routine might be changed; if
333 you want to explicitly link against the static version of those
334 routines, because you know you don't need to unwind through system
335 libraries, you need to explicitly say -static-libgcc.
337 If it is linked against, it has to be before -lgcc, because it may
338 need symbols from -lgcc. */
339 #undef REAL_LIBGCC_SPEC
340 #define REAL_LIBGCC_SPEC \
341 "%{static-libgcc|static: -lgcc_eh -lgcc; \
342 shared-libgcc|fexceptions|fgnu-runtime: \
343 %:version-compare(!> 10.5 mmacosx-version-min= -lgcc_s.10.4) \
344 %:version-compare(>< 10.5 10.6 mmacosx-version-min= -lgcc_s.10.5) \
345 %:version-compare(!> 10.5 mmacosx-version-min= -lgcc_ext.10.4) \
346 %:version-compare(>= 10.5 mmacosx-version-min= -lgcc_ext.10.5) \
347 -lgcc ; \
348 :%:version-compare(>< 10.3.9 10.5 mmacosx-version-min= -lgcc_s.10.4) \
349 %:version-compare(>< 10.5 10.6 mmacosx-version-min= -lgcc_s.10.5) \
350 %:version-compare(!> 10.5 mmacosx-version-min= -lgcc_ext.10.4) \
351 %:version-compare(>= 10.5 mmacosx-version-min= -lgcc_ext.10.5) \
352 -lgcc }"
354 /* We specify crt0.o as -lcrt0.o so that ld will search the library path.
356 crt3.o provides __cxa_atexit on systems that don't have it. Since
357 it's only used with C++, which requires passing -shared-libgcc, key
358 off that to avoid unnecessarily adding a destructor to every
359 powerpc program built. */
361 #undef STARTFILE_SPEC
362 #define STARTFILE_SPEC \
363 "%{Zdynamiclib: %(darwin_dylib1) %{fgnu-tm: -lcrttms.o}} \
364 %{!Zdynamiclib:%{Zbundle:%{!static: \
365 %:version-compare(< 10.6 mmacosx-version-min= -lbundle1.o) \
366 %{fgnu-tm: -lcrttms.o}}} \
367 %{!Zbundle:%{pg:%{static:-lgcrt0.o} \
368 %{!static:%{object:-lgcrt0.o} \
369 %{!object:%{preload:-lgcrt0.o} \
370 %{!preload:-lgcrt1.o \
371 %:version-compare(>= 10.8 mmacosx-version-min= -no_new_main) \
372 %(darwin_crt2)}}}} \
373 %{!pg:%{static:-lcrt0.o} \
374 %{!static:%{object:-lcrt0.o} \
375 %{!object:%{preload:-lcrt0.o} \
376 %{!preload: %(darwin_crt1) \
377 %(darwin_crt2)}}}}}} \
378 %{shared-libgcc:%:version-compare(< 10.5 mmacosx-version-min= crt3.o%s)}"
380 /* We want a destructor last in the list. */
381 #define TM_DESTRUCTOR "%{fgnu-tm: -lcrttme.o}"
382 #define ENDFILE_SPEC TM_DESTRUCTOR
384 #define DARWIN_EXTRA_SPECS \
385 { "darwin_crt1", DARWIN_CRT1_SPEC }, \
386 { "darwin_dylib1", DARWIN_DYLIB1_SPEC },
388 #define DARWIN_DYLIB1_SPEC \
389 "%:version-compare(!> 10.5 mmacosx-version-min= -ldylib1.o) \
390 %:version-compare(>< 10.5 10.6 mmacosx-version-min= -ldylib1.10.5.o)"
392 #define DARWIN_CRT1_SPEC \
393 "%:version-compare(!> 10.5 mmacosx-version-min= -lcrt1.o) \
394 %:version-compare(>< 10.5 10.6 mmacosx-version-min= -lcrt1.10.5.o) \
395 %:version-compare(>< 10.6 10.8 mmacosx-version-min= -lcrt1.10.6.o) \
396 %{fgnu-tm: -lcrttms.o}"
398 #ifdef HAVE_AS_MMACOSX_VERSION_MIN_OPTION
399 /* Emit macosx version (but only major). */
400 #define ASM_MMACOSX_VERSION_MIN_SPEC \
401 " %{asm_macosx_version_min=*: -mmacosx-version-min=%*} %<asm_macosx_version_min=*"
402 #else
403 #define ASM_MMACOSX_VERSION_MIN_SPEC " %<asm_macosx_version_min=*"
404 #endif
406 /* When we detect that we're cctools or llvm as, we need to insert the right
407 additional options. */
408 #if HAVE_GNU_AS
409 #define ASM_OPTIONS ""
410 #else
411 #define ASM_OPTIONS "%{v} %{w:-W} %{I*}"
412 #endif
414 /* Default Darwin ASM_SPEC, very simple. */
415 #define ASM_SPEC "-arch %(darwin_arch) \
416 " ASM_OPTIONS " \
417 %{Zforce_cpusubtype_ALL:-force_cpusubtype_ALL} \
418 %{static}" ASM_MMACOSX_VERSION_MIN_SPEC
420 /* Default ASM_DEBUG_SPEC. Darwin's as cannot currently produce dwarf
421 debugging data. */
423 #define ASM_DEBUG_SPEC "%{g*:%{%:debug-level-gt(0):%{!gdwarf*:--gstabs}}}"
425 /* We still allow output of STABS if the assembler supports it. */
426 #ifdef HAVE_AS_STABS_DIRECTIVE
427 #define DBX_DEBUGGING_INFO 1
428 #define PREFERRED_DEBUGGING_TYPE DBX_DEBUG
429 #endif
431 #define DWARF2_DEBUGGING_INFO 1
433 #define DEBUG_FRAME_SECTION "__DWARF,__debug_frame,regular,debug"
434 #define DEBUG_INFO_SECTION "__DWARF,__debug_info,regular,debug"
435 #define DEBUG_ABBREV_SECTION "__DWARF,__debug_abbrev,regular,debug"
436 #define DEBUG_ARANGES_SECTION "__DWARF,__debug_aranges,regular,debug"
437 #define DEBUG_MACINFO_SECTION "__DWARF,__debug_macinfo,regular,debug"
438 #define DEBUG_LINE_SECTION "__DWARF,__debug_line,regular,debug"
439 #define DEBUG_LOC_SECTION "__DWARF,__debug_loc,regular,debug"
440 #define DEBUG_PUBNAMES_SECTION "__DWARF,__debug_pubnames,regular,debug"
441 #define DEBUG_PUBTYPES_SECTION "__DWARF,__debug_pubtypes,regular,debug"
442 #define DEBUG_STR_SECTION "__DWARF,__debug_str,regular,debug"
443 #define DEBUG_RANGES_SECTION "__DWARF,__debug_ranges,regular,debug"
444 #define DEBUG_MACRO_SECTION "__DWARF,__debug_macro,regular,debug"
446 #define DEBUG_LTO_INFO_SECTION "__GNU_DWARF_LTO,__debug_info,regular,debug"
447 #define DEBUG_LTO_ABBREV_SECTION "__GNU_DWARF_LTO,__debug_abbrev,regular,debug"
448 #define DEBUG_LTO_MACINFO_SECTION "__GNU_DWARF_LTO,__debug_macinfo,regular,debug"
449 #define DEBUG_LTO_LINE_SECTION "__GNU_DWARF_LTO,__debug_line,regular,debug"
450 #define DEBUG_LTO_STR_SECTION "__GNU_DWARF_LTO,__debug_str,regular,debug"
451 #define DEBUG_LTO_MACRO_SECTION "__GNU_DWARF_LTO,__debug_macro,regular,debug"
453 #define TARGET_WANT_DEBUG_PUB_SECTIONS true
455 /* When generating stabs debugging, use N_BINCL entries. */
457 #define DBX_USE_BINCL
459 /* There is no limit to the length of stabs strings. */
461 #define DBX_CONTIN_LENGTH 0
463 /* gdb needs a null N_SO at the end of each file for scattered loading. */
465 #define DBX_OUTPUT_NULL_N_SO_AT_MAIN_SOURCE_FILE_END
467 /* GCC's definition of 'one_only' is the same as its definition of 'weak'. */
468 #define MAKE_DECL_ONE_ONLY(DECL) (DECL_WEAK (DECL) = 1)
470 /* Mach-O supports 'weak imports', and 'weak definitions' in coalesced
471 sections. machopic_select_section ensures that weak variables go in
472 coalesced sections. Weak aliases (or any other kind of aliases) are
473 not supported. Weak symbols that aren't visible outside the .s file
474 are not supported. */
475 #define ASM_WEAKEN_DECL(FILE, DECL, NAME, ALIAS) \
476 do { \
477 if (ALIAS) \
479 warning (0, "alias definitions not supported in Mach-O; ignored"); \
480 break; \
483 if (! DECL_EXTERNAL (DECL) && TREE_PUBLIC (DECL)) \
484 targetm.asm_out.globalize_label (FILE, NAME); \
485 if (DECL_EXTERNAL (DECL)) \
486 fputs ("\t.weak_reference ", FILE); \
487 else if (lookup_attribute ("weak_import", DECL_ATTRIBUTES (DECL))) \
488 break; \
489 else if (TREE_PUBLIC (DECL)) \
490 fputs ("\t.weak_definition ", FILE); \
491 else \
492 break; \
493 assemble_name (FILE, NAME); \
494 fputc ('\n', FILE); \
495 } while (0)
497 /* Darwin has the pthread routines in libSystem, which every program
498 links to, so there's no need for weak-ness for that. */
499 #define GTHREAD_USE_WEAK 0
501 /* The Darwin linker doesn't want coalesced symbols to appear in
502 a static archive's table of contents. */
503 #undef TARGET_WEAK_NOT_IN_ARCHIVE_TOC
504 #define TARGET_WEAK_NOT_IN_ARCHIVE_TOC 1
506 /* On Darwin, we don't (at the time of writing) have linkonce sections
507 with names, so it's safe to make the class data not comdat. */
508 #define TARGET_CXX_CLASS_DATA_ALWAYS_COMDAT hook_bool_void_false
510 /* For efficiency, on Darwin the RTTI information that is always
511 emitted in the standard C++ library should not be COMDAT. */
512 #define TARGET_CXX_LIBRARY_RTTI_COMDAT hook_bool_void_false
514 /* We make exception information linkonce. */
515 #undef TARGET_USES_WEAK_UNWIND_INFO
516 #define TARGET_USES_WEAK_UNWIND_INFO 1
518 /* We need to use a nonlocal label for the start of an EH frame: the
519 Darwin linker requires that a coalesced section start with a label.
520 Unfortunately, it also requires that 'debug' sections don't contain
521 labels. */
522 #undef FRAME_BEGIN_LABEL
523 #define FRAME_BEGIN_LABEL (for_eh ? "EH_frame" : "Lframe")
525 /* Emit a label for the FDE corresponding to DECL. EMPTY means
526 emit a label for an empty FDE. */
527 #define TARGET_ASM_EMIT_UNWIND_LABEL darwin_emit_unwind_label
529 /* Emit a label to separate the exception table. */
530 #define TARGET_ASM_EMIT_EXCEPT_TABLE_LABEL darwin_emit_except_table_label
532 /* Our profiling scheme doesn't LP labels and counter words. */
534 #define NO_PROFILE_COUNTERS 1
536 #undef INIT_SECTION_ASM_OP
537 #define INIT_SECTION_ASM_OP ""
539 #undef INVOKE__main
541 #define TARGET_ASM_CONSTRUCTOR machopic_asm_out_constructor
542 #define TARGET_ASM_DESTRUCTOR machopic_asm_out_destructor
544 /* Always prefix with an underscore. */
546 #define USER_LABEL_PREFIX "_"
548 /* A dummy symbol that will be replaced with the function base name. */
549 #define MACHOPIC_FUNCTION_BASE_NAME "<pic base>"
551 /* Don't output a .file directive. That is only used by the assembler for
552 error reporting. */
553 #undef TARGET_ASM_FILE_START_FILE_DIRECTIVE
554 #define TARGET_ASM_FILE_START_FILE_DIRECTIVE false
556 #undef TARGET_ASM_FILE_END
557 #define TARGET_ASM_FILE_END darwin_file_end
559 /* Because Mach-O relocations have a counter from 1 to 255 for the
560 section number they apply to, it is necessary to output all
561 normal sections before the LTO sections, to make sure that the
562 sections that may have relocations always have a section number
563 smaller than 255. */
564 #undef TARGET_ASM_LTO_START
565 #define TARGET_ASM_LTO_START darwin_asm_lto_start
566 #undef TARGET_ASM_LTO_END
567 #define TARGET_ASM_LTO_END darwin_asm_lto_end
569 #define ASM_OUTPUT_SKIP(FILE,SIZE) \
570 fprintf (FILE, "\t.space " HOST_WIDE_INT_PRINT_UNSIGNED"\n", SIZE)
572 /* Give ObjC methods pretty symbol names. */
574 #undef OBJC_GEN_METHOD_LABEL
575 #define OBJC_GEN_METHOD_LABEL(BUF,IS_INST,CLASS_NAME,CAT_NAME,SEL_NAME,NUM) \
576 do { if (CAT_NAME) \
577 sprintf (BUF, "%c[%s(%s) %s]", (IS_INST) ? '-' : '+', \
578 (CLASS_NAME), (CAT_NAME), (SEL_NAME)); \
579 else \
580 sprintf (BUF, "%c[%s %s]", (IS_INST) ? '-' : '+', \
581 (CLASS_NAME), (SEL_NAME)); \
582 } while (0)
584 #undef ASM_DECLARE_OBJECT_NAME
585 #define ASM_DECLARE_OBJECT_NAME(FILE, NAME, DECL) \
586 darwin_asm_declare_object_name ((FILE), (NAME), (DECL))
588 /* The RTTI data (e.g., __ti4name) is common and public (and static),
589 but it does need to be referenced via indirect PIC data pointers.
590 The machopic_define_symbol calls are telling the machopic subsystem
591 that the name *is* defined in this module, so it doesn't need to
592 make them indirect. */
594 #define ASM_DECLARE_FUNCTION_NAME(FILE, NAME, DECL) \
595 do { \
596 const char *xname = NAME; \
597 if (GET_CODE (XEXP (DECL_RTL (DECL), 0)) != SYMBOL_REF) \
598 xname = IDENTIFIER_POINTER (DECL_NAME (DECL)); \
599 if (! DECL_WEAK (DECL) \
600 && ((TREE_STATIC (DECL) \
601 && (!DECL_COMMON (DECL) || !TREE_PUBLIC (DECL))) \
602 || DECL_INITIAL (DECL))) \
603 machopic_define_symbol (DECL_RTL (DECL)); \
604 if ((TREE_STATIC (DECL) \
605 && (!DECL_COMMON (DECL) || !TREE_PUBLIC (DECL))) \
606 || DECL_INITIAL (DECL)) \
607 (* targetm.encode_section_info) (DECL, DECL_RTL (DECL), false); \
608 ASM_OUTPUT_FUNCTION_LABEL (FILE, xname, DECL); \
609 } while (0)
611 #undef TARGET_ASM_DECLARE_CONSTANT_NAME
612 #define TARGET_ASM_DECLARE_CONSTANT_NAME darwin_asm_declare_constant_name
614 /* Wrap new method names in quotes so the assembler doesn't gag.
615 Make Objective-C internal symbols local and in doing this, we need
616 to accommodate the name mangling done by c++ on file scope locals. */
618 int darwin_label_is_anonymous_local_objc_name (const char *name);
620 #undef ASM_OUTPUT_LABELREF
621 #define ASM_OUTPUT_LABELREF(FILE,NAME) \
622 do { \
623 const char *xname = (NAME); \
624 if (! strcmp (xname, MACHOPIC_FUNCTION_BASE_NAME)) \
625 machopic_output_function_base_name(FILE); \
626 else if (xname[0] == '&' || xname[0] == '*') \
628 int len = strlen (xname); \
629 if (len > 6 && !strcmp ("$stub", xname + len - 5)) \
630 machopic_validate_stub_or_non_lazy_ptr (xname); \
631 else if (len > 7 && !strcmp ("$stub\"", xname + len - 6)) \
632 machopic_validate_stub_or_non_lazy_ptr (xname); \
633 else if (len > 14 && !strcmp ("$non_lazy_ptr", xname + len - 13)) \
634 machopic_validate_stub_or_non_lazy_ptr (xname); \
635 else if (len > 15 && !strcmp ("$non_lazy_ptr\"", xname + len - 14)) \
636 machopic_validate_stub_or_non_lazy_ptr (xname); \
637 if (xname[1] != '"' && name_needs_quotes (&xname[1])) \
638 fprintf (FILE, "\"%s\"", &xname[1]); \
639 else \
640 fputs (&xname[1], FILE); \
642 else if (xname[0] == '+' || xname[0] == '-') \
643 fprintf (FILE, "\"%s\"", xname); \
644 else if (darwin_label_is_anonymous_local_objc_name (xname)) \
645 fprintf (FILE, "L%s", xname); \
646 else if (xname[0] != '"' && name_needs_quotes (xname)) \
647 asm_fprintf (FILE, "\"%U%s\"", xname); \
648 else \
649 asm_fprintf (FILE, "%U%s", xname); \
650 } while (0)
652 /* Output before executable code. */
653 #undef TEXT_SECTION_ASM_OP
654 #define TEXT_SECTION_ASM_OP "\t.text"
656 /* Output before writable data. */
658 #undef DATA_SECTION_ASM_OP
659 #define DATA_SECTION_ASM_OP "\t.data"
661 #undef ALIGN_ASM_OP
662 #define ALIGN_ASM_OP ".align"
664 #undef ASM_OUTPUT_ALIGN
665 #define ASM_OUTPUT_ALIGN(FILE,LOG) \
666 if ((LOG) != 0) \
667 fprintf (FILE, "\t%s\t%d\n", ALIGN_ASM_OP, (LOG))
669 /* The maximum alignment which the object file format can support in
670 bits. For Mach-O, this is 2^15 bytes. */
672 #undef MAX_OFILE_ALIGNMENT
673 #define MAX_OFILE_ALIGNMENT (0x8000 * 8)
675 #define L2_MAX_OFILE_ALIGNMENT 15
677 /* These are the three variants that emit referenced blank space. */
678 #define ASM_OUTPUT_ALIGNED_BSS(FILE, DECL, NAME, SIZE, ALIGN) \
679 darwin_output_aligned_bss ((FILE), (DECL), (NAME), (SIZE), (ALIGN))
681 #undef ASM_OUTPUT_ALIGNED_DECL_LOCAL
682 #define ASM_OUTPUT_ALIGNED_DECL_LOCAL(FILE, DECL, NAME, SIZE, ALIGN) \
683 darwin_asm_output_aligned_decl_local \
684 ((FILE), (DECL), (NAME), (SIZE), (ALIGN))
686 #undef ASM_OUTPUT_ALIGNED_DECL_COMMON
687 #define ASM_OUTPUT_ALIGNED_DECL_COMMON(FILE, DECL, NAME, SIZE, ALIGN) \
688 darwin_asm_output_aligned_decl_common \
689 ((FILE), (DECL), (NAME), (SIZE), (ALIGN))
691 /* The generic version, archs should over-ride where required. */
692 #define MACHOPIC_NL_SYMBOL_PTR_SECTION ".non_lazy_symbol_pointer"
694 /* Declare the section variables. */
695 #ifndef USED_FOR_TARGET
696 enum darwin_section_enum {
697 #define DEF_SECTION(NAME, FLAGS, DIRECTIVE, OBJC) NAME,
698 #include "darwin-sections.def"
699 #undef DEF_SECTION
700 NUM_DARWIN_SECTIONS
702 extern GTY(()) section * darwin_sections[NUM_DARWIN_SECTIONS];
703 #endif
705 #undef TARGET_ASM_SELECT_SECTION
706 #define TARGET_ASM_SELECT_SECTION machopic_select_section
708 #undef TARGET_ASM_FUNCTION_SECTION
709 #define TARGET_ASM_FUNCTION_SECTION darwin_function_section
711 #undef TARGET_ASM_FUNCTION_SWITCHED_TEXT_SECTIONS
712 #define TARGET_ASM_FUNCTION_SWITCHED_TEXT_SECTIONS \
713 darwin_function_switched_text_sections
715 #undef TARGET_ASM_SELECT_RTX_SECTION
716 #define TARGET_ASM_SELECT_RTX_SECTION machopic_select_rtx_section
717 #undef TARGET_ASM_UNIQUE_SECTION
718 #define TARGET_ASM_UNIQUE_SECTION darwin_unique_section
719 #undef TARGET_ASM_FUNCTION_RODATA_SECTION
720 #define TARGET_ASM_FUNCTION_RODATA_SECTION default_no_function_rodata_section
722 #undef TARGET_ASM_TM_CLONE_TABLE_SECTION
723 #define TARGET_ASM_TM_CLONE_TABLE_SECTION darwin_tm_clone_table_section
725 #undef TARGET_ASM_RELOC_RW_MASK
726 #define TARGET_ASM_RELOC_RW_MASK machopic_reloc_rw_mask
728 /* Globalizing directive for a label. */
729 #define GLOBAL_ASM_OP "\t.globl "
730 #define TARGET_ASM_GLOBALIZE_LABEL darwin_globalize_label
732 /* Emit an assembler directive to set visibility for a symbol. Used
733 to support visibility attribute and Darwin's private extern
734 feature. */
735 #undef TARGET_ASM_ASSEMBLE_VISIBILITY
736 #define TARGET_ASM_ASSEMBLE_VISIBILITY darwin_assemble_visibility
738 /* Extra attributes for Darwin. */
739 #define SUBTARGET_ATTRIBUTE_TABLE \
740 /* { name, min_len, max_len, decl_req, type_req, fn_type_req, \
741 affects_type_identity, handler, exclude } */ \
742 { "apple_kext_compatibility", 0, 0, false, true, false, false, \
743 darwin_handle_kext_attribute, NULL }, \
744 { "weak_import", 0, 0, true, false, false, false, \
745 darwin_handle_weak_import_attribute, NULL }
747 /* Make local constant labels linker-visible, so that if one follows a
748 weak_global constant, ld64 will be able to separate the atoms. */
749 #undef ASM_GENERATE_INTERNAL_LABEL
750 #define ASM_GENERATE_INTERNAL_LABEL(LABEL,PREFIX,NUM) \
751 do { \
752 if (strcmp ("LC", PREFIX) == 0) \
753 sprintf (LABEL, "*%s%ld", "lC", (long)(NUM)); \
754 else \
755 sprintf (LABEL, "*%s%ld", PREFIX, (long)(NUM)); \
756 } while (0)
758 #undef TARGET_ASM_MARK_DECL_PRESERVED
759 #define TARGET_ASM_MARK_DECL_PRESERVED darwin_mark_decl_preserved
761 /* Set on a symbol with SYMBOL_FLAG_FUNCTION or
762 MACHO_SYMBOL_FLAG_VARIABLE to indicate that the function or
763 variable has been defined in this translation unit.
764 When porting Mach-O to new architectures you need to make
765 sure these aren't clobbered by the backend. */
767 #define MACHO_SYMBOL_FLAG_VARIABLE (SYMBOL_FLAG_MACH_DEP)
768 #define MACHO_SYMBOL_FLAG_DEFINED ((SYMBOL_FLAG_MACH_DEP) << 1)
770 /* Set on a symbol to indicate when fix-and-continue style code
771 generation is being used and the symbol refers to a static symbol
772 that should be rebound from new instances of a translation unit to
773 the original instance of the data. */
775 #define MACHO_SYMBOL_STATIC ((SYMBOL_FLAG_MACH_DEP) << 2)
777 /* Symbolic names for various things we might know about a symbol. */
779 enum machopic_addr_class {
780 MACHOPIC_UNDEFINED,
781 MACHOPIC_DEFINED_DATA,
782 MACHOPIC_UNDEFINED_DATA,
783 MACHOPIC_DEFINED_FUNCTION,
784 MACHOPIC_UNDEFINED_FUNCTION
787 /* Macros defining the various PIC cases. */
789 #undef MACHO_DYNAMIC_NO_PIC_P
790 #define MACHO_DYNAMIC_NO_PIC_P (TARGET_MACHO_DYNAMIC_NO_PIC)
791 #undef MACHOPIC_INDIRECT
792 #define MACHOPIC_INDIRECT (flag_pic || MACHO_DYNAMIC_NO_PIC_P)
793 #define MACHOPIC_JUST_INDIRECT (MACHO_DYNAMIC_NO_PIC_P)
794 #undef MACHOPIC_PURE
795 #define MACHOPIC_PURE (flag_pic && ! MACHO_DYNAMIC_NO_PIC_P)
797 #undef TARGET_ENCODE_SECTION_INFO
798 #define TARGET_ENCODE_SECTION_INFO darwin_encode_section_info
799 #undef TARGET_STRIP_NAME_ENCODING
800 #define TARGET_STRIP_NAME_ENCODING default_strip_name_encoding
802 #define GEN_BINDER_NAME_FOR_STUB(BUF,STUB,STUB_LENGTH) \
803 do { \
804 const char *const stub_ = (STUB); \
805 char *buffer_ = (BUF); \
806 strcpy (buffer_, stub_); \
807 if (stub_[0] == '"') \
809 strcpy (buffer_ + (STUB_LENGTH) - 1, "_binder\""); \
811 else \
813 strcpy (buffer_ + (STUB_LENGTH), "_binder"); \
815 } while (0)
817 #define GEN_SYMBOL_NAME_FOR_SYMBOL(BUF,SYMBOL,SYMBOL_LENGTH) \
818 do { \
819 const char *const symbol_ = (SYMBOL); \
820 char *buffer_ = (BUF); \
821 if (name_needs_quotes (symbol_) && symbol_[0] != '"') \
823 sprintf (buffer_, "\"%s\"", symbol_); \
825 else \
827 strcpy (buffer_, symbol_); \
829 } while (0)
831 /* Given a symbol name string, create the lazy pointer version
832 of the symbol name. */
834 #define GEN_LAZY_PTR_NAME_FOR_SYMBOL(BUF,SYMBOL,SYMBOL_LENGTH) \
835 do { \
836 const char *symbol_ = (SYMBOL); \
837 char *buffer_ = (BUF); \
838 if (symbol_[0] == '"') \
840 strcpy (buffer_, "\"L"); \
841 strcpy (buffer_ + 2, symbol_ + 1); \
842 strcpy (buffer_ + (SYMBOL_LENGTH), "$lazy_ptr\""); \
844 else if (name_needs_quotes (symbol_)) \
846 strcpy (buffer_, "\"L"); \
847 strcpy (buffer_ + 2, symbol_); \
848 strcpy (buffer_ + (SYMBOL_LENGTH) + 2, "$lazy_ptr\""); \
850 else \
852 strcpy (buffer_, "L"); \
853 strcpy (buffer_ + 1, symbol_); \
854 strcpy (buffer_ + (SYMBOL_LENGTH) + 1, "$lazy_ptr"); \
856 } while (0)
858 #define EH_FRAME_SECTION_NAME "__TEXT"
859 #define EH_FRAME_SECTION_ATTR ",coalesced,no_toc+strip_static_syms+live_support"
861 #undef ASM_PREFERRED_EH_DATA_FORMAT
862 #define ASM_PREFERRED_EH_DATA_FORMAT(CODE,GLOBAL) \
863 (((CODE) == 2 && (GLOBAL) == 1) \
864 ? (DW_EH_PE_pcrel | DW_EH_PE_indirect | DW_EH_PE_sdata4) : \
865 ((CODE) == 1 || (GLOBAL) == 0) ? DW_EH_PE_pcrel : DW_EH_PE_absptr)
867 #define ASM_OUTPUT_DWARF_DELTA(FILE,SIZE,LABEL1,LABEL2) \
868 darwin_asm_output_dwarf_delta (FILE, SIZE, LABEL1, LABEL2, 0)
870 #define ASM_OUTPUT_DWARF_OFFSET(FILE,SIZE,LABEL,OFFSET,BASE) \
871 darwin_asm_output_dwarf_offset (FILE, SIZE, LABEL, OFFSET, BASE)
873 #define ASM_MAYBE_OUTPUT_ENCODED_ADDR_RTX(ASM_OUT_FILE, ENCODING, SIZE, ADDR, DONE) \
874 if (ENCODING == ASM_PREFERRED_EH_DATA_FORMAT (2, 1)) { \
875 darwin_non_lazy_pcrel (ASM_OUT_FILE, ADDR); \
876 goto DONE; \
879 /* Experimentally, putting jump tables in text is faster on SPEC.
880 Also this is needed for correctness for coalesced functions. */
882 #ifndef JUMP_TABLES_IN_TEXT_SECTION
883 #define JUMP_TABLES_IN_TEXT_SECTION 1
884 #endif
886 #define TARGET_TERMINATE_DW2_EH_FRAME_INFO false
888 #define TARGET_ASM_INIT_SECTIONS darwin_init_sections
889 #undef TARGET_ASM_NAMED_SECTION
890 #define TARGET_ASM_NAMED_SECTION darwin_asm_named_section
892 #define DARWIN_REGISTER_TARGET_PRAGMAS() \
893 do { \
894 if (!flag_preprocess_only) \
895 cpp_register_pragma (parse_in, NULL, "mark", \
896 darwin_pragma_ignore, false); \
897 c_register_pragma (0, "options", darwin_pragma_options); \
898 c_register_pragma (0, "segment", darwin_pragma_ignore); \
899 c_register_pragma (0, "unused", darwin_pragma_unused); \
900 c_register_pragma (0, "ms_struct", darwin_pragma_ms_struct); \
901 } while (0)
903 #undef ASM_APP_ON
904 #define ASM_APP_ON ""
905 #undef ASM_APP_OFF
906 #define ASM_APP_OFF ""
908 void darwin_register_frameworks (const char *, const char *, int);
909 void darwin_register_objc_includes (const char *, const char *, int);
910 #define TARGET_EXTRA_PRE_INCLUDES darwin_register_objc_includes
911 #define TARGET_EXTRA_INCLUDES darwin_register_frameworks
913 void add_framework_path (char *);
914 #define TARGET_OPTF add_framework_path
916 #define TARGET_POSIX_IO
918 #define WINT_TYPE "int"
920 /* Every program on darwin links against libSystem which contains the pthread
921 routines, so there's no need to explicitly call out when doing threaded
922 work. */
924 #undef GOMP_SELF_SPECS
925 #define GOMP_SELF_SPECS ""
926 #undef GTM_SELF_SPECS
927 #define GTM_SELF_SPECS ""
929 /* Darwin disables section anchors by default.
930 They should be enabled per arch where support exists in that arch. */
931 #define TARGET_ASM_OUTPUT_ANCHOR NULL
932 #define DARWIN_SECTION_ANCHORS 0
934 #define HAVE_ENABLE_EXECUTE_STACK
936 /* For Apple KEXTs, we make the constructors return this to match gcc
937 2.95. */
938 #define TARGET_CXX_CDTOR_RETURNS_THIS (darwin_kextabi_p)
939 #define TARGET_KEXTABI flag_apple_kext
941 /* We have target-specific builtins. */
942 #define SUBTARGET_FOLD_BUILTIN darwin_fold_builtin
944 #define TARGET_N_FORMAT_TYPES 1
945 #define TARGET_FORMAT_TYPES darwin_additional_format_types
947 #ifndef USED_FOR_TARGET
948 extern void darwin_driver_init (unsigned int *,struct cl_decoded_option **);
949 #define GCC_DRIVER_HOST_INITIALIZATION \
950 darwin_driver_init (&decoded_options_count, &decoded_options)
951 #endif
953 /* The Apple assembler and linker do not support constructor priorities. */
954 #undef SUPPORTS_INIT_PRIORITY
955 #define SUPPORTS_INIT_PRIORITY 0
957 /* When building cross-compilers (and native crosses) we shall default to
958 providing an osx-version-min of this unless overridden by the User.
959 10.5 is the only version that fully supports all our archs so that's the
960 fall-back default. */
961 #define DEF_MIN_OSX_VERSION "10.5"
963 /* Later versions of ld64 support coalescing weak code/data without requiring
964 that they be placed in specially identified sections. This is the earliest
965 _tested_ version known to support this so far. */
966 #define MIN_LD64_NO_COAL_SECTS "236.4"
968 #ifndef LD64_VERSION
969 #define LD64_VERSION "85.2"
970 #else
971 #define DEF_LD64 LD64_VERSION
972 #endif
974 #endif /* CONFIG_DARWIN_H */