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c++: more dummy non_constant_p arg avoidance
[official-gcc.git] / gcc / config / darwin.h
blobb7cfab607dbb5aca250cb8ac96d74b687e105d13
1 /* Target definitions for Darwin (macOS) systems.
2 Copyright (C) 1989-2023 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 macOS. 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 #define OBJECT_FORMAT_MACHO 1
47
48 /* Suppress g++ attempt to link in the math library automatically. */
49 #define MATH_LIBRARY ""
50
51 /* We have atexit. */
52
53 #define HAVE_ATEXIT
54
55 /* Define an empty body for the function do_global_dtors() in libgcc2.c. */
56
57 #define DO_GLOBAL_DTORS_BODY
58
59 /* Register static destructors to run from __cxa_atexit instead of putting
60 them into a .mod_term_funcs section. */
61
62 #define TARGET_DTORS_FROM_CXA_ATEXIT true
63
64 /* The string value for __SIZE_TYPE__. */
65
66 #ifndef SIZE_TYPE
67 #define SIZE_TYPE "long unsigned int"
68 #endif
69
70 /* Type used for ptrdiff_t, as a string used in a declaration. */
71
72 #undef PTRDIFF_TYPE
73 #define PTRDIFF_TYPE "int"
74
75 /* wchar_t is int. */
76
77 #undef WCHAR_TYPE
78 #define WCHAR_TYPE "int"
79 #undef WCHAR_TYPE_SIZE
80 #define WCHAR_TYPE_SIZE 32
81
82 #define INT8_TYPE "signed char"
83 #define INT16_TYPE "short int"
84 #define INT32_TYPE "int"
85 #define INT64_TYPE "long long int"
86 #define UINT8_TYPE "unsigned char"
87 #define UINT16_TYPE "short unsigned int"
88 #define UINT32_TYPE "unsigned int"
89 #define UINT64_TYPE "long long unsigned int"
90
91 #define INT_LEAST8_TYPE "signed char"
92 #define INT_LEAST16_TYPE "short int"
93 #define INT_LEAST32_TYPE "int"
94 #define INT_LEAST64_TYPE "long long int"
95 #define UINT_LEAST8_TYPE "unsigned char"
96 #define UINT_LEAST16_TYPE "short unsigned int"
97 #define UINT_LEAST32_TYPE "unsigned int"
98 #define UINT_LEAST64_TYPE "long long unsigned int"
99
100 #define INT_FAST8_TYPE "signed char"
101 #define INT_FAST16_TYPE "short int"
102 #define INT_FAST32_TYPE "int"
103 #define INT_FAST64_TYPE "long long int"
104 #define UINT_FAST8_TYPE "unsigned char"
105 #define UINT_FAST16_TYPE "short unsigned int"
106 #define UINT_FAST32_TYPE "unsigned int"
107 #define UINT_FAST64_TYPE "long long unsigned int"
108
109 #define INTPTR_TYPE "long int"
110 #define UINTPTR_TYPE "long unsigned int"
111
112 #define SIG_ATOMIC_TYPE "int"
113
114 /* Default to using the NeXT-style runtime, since that's what is
115 pre-installed on Darwin systems. */
116
117 #define NEXT_OBJC_RUNTIME 100508
118
119 /* Don't default to pcc-struct-return, because gcc is the only compiler, and
120 we want to retain compatibility with older gcc versions. */
121
122 #undef DEFAULT_PCC_STRUCT_RETURN
123 #define DEFAULT_PCC_STRUCT_RETURN 0
124
125 /* True if pragma ms_struct is in effect. */
126 extern GTY(()) int darwin_ms_struct;
127
128 /* Darwin has a user convenience feature where some linker options are exposed
129 at the driver level (so one can type "-all_load" instead of "-Wl,-all_load"
130 or "-Xlinker -all_load"). We retain this, but now these options are all
131 marked as 'Driver' and we process them as early as possible so that they
132 get allocated to the right toolchain command. There are a couple of special
133 cases where these driver opts are used multiple times, or to control
134 operations on more than one command (e.g. dynamiclib). These are handled
135 specially and we then add %<xxxx specs for the commands that _don't_ need
136 them. NOTE: the order of 'shared' and 'dynamiclib' is significant, hence
137 they are placed out of alphabetical order at the start. Likewise, we keep
138 a couple of cases where a negative option originally appeared after the
139 positive alternate, potentially overriding it.
140 When we report an error with %e, it seems necessary to strip the option
141 before doing so, otherwise it survives to the cc1 command line (%e doesn't
142 appear to abort the program before this).
143 Right now there's no mechanism to split up the "variable portion" (%*) of
144 the matched spec string, so where we have some driver specs that take 2
145 or 3 arguments, these cannot be processed here, but are deferred until the
146 LINK_SPEC, where they are copied verbatim. */
147
148 #undef SUBTARGET_DRIVER_SELF_SPECS
149 #define SUBTARGET_DRIVER_SELF_SPECS \
150 "%{shared:%{!dynamiclib:-dynamiclib}} %<shared", \
151 "%{static:%{dynamic|dynamiclib:%econflicting code generation switches}}",\
152 "%{dynamiclib:-Xlinker -dylib \
153 %{allowable_client*:-Xlinker -allowable_client -Xlinker %*} \
154 %<allowable_client* \
155 %{bundle_loader*: %<bundle_loader* \
156 %e-bundle_loader not allowed with -dynamiclib} \
157 %{client_name*: %<client_name* \
158 %e-client_name not allowed with -dynamiclib} \
159 %{compatibility_version*:\
160 -Xlinker -dylib_compatibility_version -Xlinker %*} \
161 %<compatibility_version* \
162 %{current_version*:-Xlinker -dylib_current_version -Xlinker %*} \
163 %<current_version* \
164 %{install_name*:-Xlinker -dylib_install_name -Xlinker %* } \
165 %<install_name* \
166 %{keep_private_externs: %<keep_private_externs \
167 %e-keep_private_externs not allowed with -dynamiclib} \
168 %{private_bundle: %<private_bundle \
169 %e-private_bundle not allowed with -dynamiclib} \
170 }", \
171 "%{!dynamiclib: \
172 %{bundle_loader*:-Xlinker -bundle_loader -Xlinker %*} \
173 %<bundle_loader* \
174 %{client_name*:-Xlinker -client_name -Xlinker %*} \
175 %<client_name* \
176 %{compatibility_version*: %<compatibility_version* \
177 %e-compatibility_version only allowed with -dynamiclib} \
178 %{current_version*: %<current_version* \
179 %e-current_version only allowed with -dynamiclib} \
180 %{install_name*: %<install_name* \
181 %e-install_name only allowed with -dynamiclib} \
182 %{keep_private_externs:-Xlinker -keep_private_externs} \
183 %<keep_private_externs \
184 %{private_bundle:-Xlinker -private_bundle} \
185 %<private_bundle \
186 }", \
187 "%{all_load:-Xlinker -all_load} %<all_load", \
188 "%{arch_errors_fatal:-Xlinker -arch_errors_fatal} \
189 %<arch_errors_fatal", \
190 "%{bind_at_load:-Xlinker -bind_at_load} %<bind_at_load", \
191 "%{bundle:%{!dynamiclib:-Xlinker -bundle; \
192 :%e-bundle not allowed with -dynamiclib}}", \
193 "%{dead_strip:-Xlinker -dead_strip} %<dead_strip", \
194 "%{dylib_file*:-Xlinker -dylib_file -Xlinker %*} %<dylib_file*", \
195 "%{dylinker:-Xlinker -dylinker} %<dylinker", \
196 "%{dylinker_install_name*:-Xlinker -dylinker_install_name -Xlinker %*}\
197 %<dylinker_install_name*", \
198 "%{exported_symbols_list*:-Xlinker -exported_symbols_list -Xlinker %*}\
199 %<exported_symbols_list", \
200 "%{findirect-virtual-calls: -fapple-kext} %<findirect-virtual-calls", \
201 "%{fterminated-vtables: -fapple-kext} %<fterminated-vtables", \
202 "%{fapple-kext|mkernel:-static}", \
203 "%{filelist*:-Xlinker -filelist -Xlinker %*} %<filelist*", \
204 "%{flat_namespace:-Xlinker -flat_namespace} %<flat_namespace", \
205 "%{force_cpusubtype_ALL:-Xassembler -force_cpusubtype_ALL} ", \
206 "%{force_flat_namespace: \
207 %{!dynamiclib:-Xlinker -force_flat_namespace; \
208 :%e-force_flat_namespace not allowed with -dynamiclib}} \
209 %<force_flat_namespace", \
210 "%{framework*:-Xlinker -framework -Xlinker %*} %<framework*", \
211 "%{gfull:-g -fno-eliminate-unused-debug-symbols} %<gfull", \
212 "%{gused:-g -feliminate-unused-debug-symbols} %<gused", \
213 "%{gsplit-dwarf:%ngsplit-dwarf is not supported on this platform} \
214 %<gsplit-dwarf", \
215 "%{headerpad_max_install_names:-Xlinker -headerpad_max_install_names}\
216 %<headerpad_max_install_names", \
217 "%{image_base*:-Xlinker -image_base -Xlinker %*} %<image_base*", \
218 "%{init*:-Xlinker -init -Xlinker %*} %<init*", \
219 "%{multi_module:-Xlinker -multi_module} %<multi_module", \
220 "%{multiply_defined*:-Xlinker -multiply_defined -Xlinker %*} ", \
221 "%{multiplydefinedunused*:\
222 -Xlinker -multiply_defined_unused -Xlinker %*} \
223 %<multiplydefinedunused* ", \
224 "%{no_dead_strip_inits_and_terms:\
225 -Xlinker -no_dead_strip_inits_and_terms} \
226 %<no_dead_strip_inits_and_terms", \
227 "%{nofixprebinding:-Xlinker -nofixprebinding} %<nofixprebinding", \
228 "%{nomultidefs:-Xlinker -nomultidefs} %<nomultidefs", \
229 "%{pagezero_size*:-Xlinker -pagezero_size -Xlinker %*} \
230 %<pagezero_size", \
231 "%{prebind:-Xlinker -prebind} %<prebind", \
232 "%{noprebind:-Xlinker -noprebind} %<noprebind", \
233 "%{prebind_all_twolevel_modules:\
234 -Xlinker -prebind_all_twolevel_modules} \
235 %<prebind_all_twolevel_modules", \
236 "%{preload:-Xlinker -preload} %<preload", \
237 "%{read_only_relocs*:-Xlinker -read_only_relocs -Xlinker %*} \
238 %<read_only_relocs*", \
239 "%{rpath*: -Xlinker -rpath -Xlinker %*}", \
240 "%{seg_addr_table_filename*: \
241 -Xlinker -seg_addr_table_filename -Xlinker %*} \
242 %<seg_addr_table_filename*", \
243 "%{seg_addr_table*:-Xlinker -seg_addr_table -Xlinker %*} \
244 %<seg_addr_table*", \
245 "%{seg1addr*:-Xlinker -image_base -Xlinker %*} %<seg1addr*", \
246 "%{seglinkedit:-Xlinker -seglinkedit} %<seglinkedit", \
247 "%{noseglinkedit:-Xlinker -noseglinkedit} %<noseglinkedit", \
248 "%{segs_read_only_addr*:-Xlinker -segs_read_only_addr -Xlinker %*} \
249 %<segs_read_only_addr*", \
250 "%{segs_read_write_addr*:-Xlinker -segs_read_write_addr -Xlinker %*} \
251 %<segs_read_write_addr*", \
252 "%{single_module:-Xlinker -single_module} %<single_module", \
253 "%{sub_library*:-Xlinker -sub_library -Xlinker %*} %<sub_library*", \
254 "%{sub_umbrella*:-Xlinker -sub_umbrella -Xlinker %*} %<sub_umbrella*",\
255 "%{twolevel_namespace:-Xlinker -twolevel_namespace} \
256 %<twolevel_namespace", \
257 "%{twolevel_namespace_hints:-Xlinker -twolevel_namespace_hints} \
258 %<twolevel_namespace_hints", \
259 "%{umbrella*:-Xlinker -umbrella -Xlinker %*} %<umbrella*", \
260 "%{undefined*:-Xlinker -undefined -Xlinker %*} %<undefined*", \
261 "%{unexported_symbols_list*:\
262 -Xlinker -unexported_symbols_list -Xlinker %*} \
263 %<unexported_symbols_list*", \
264 "%{weak_reference_mismatches*:\
265 -Xlinker -weak_reference_mismatches -Xlinker %*} \
266 %<weak_reference_mismatches*", \
267 "%{whyload:-Xlinker -whyload} %<whyload", \
268 "%{whatsloaded:-Xlinker -whatsloaded} %<whatsloaded", \
269 "%{w:-Xlinker -w}", \
270 "%<y*", \
271 "%<Mach "
272
273 #if LD64_HAS_DEMANGLE
274 #define DARWIN_LD_DEMANGLE " -demangle "
275 #else
276 #define DARWIN_LD_DEMANGLE ""
277 #endif
278
279 #if LD64_HAS_EXPORT_DYNAMIC
280 #define DARWIN_RDYNAMIC "%{rdynamic:-export_dynamic}"
281 #else
282 #define DARWIN_RDYNAMIC "%{rdynamic:%nrdynamic is not supported}"
283 #endif
284
285 #if LD64_HAS_PLATFORM_VERSION
286 #define DARWIN_PLATFORM_ID \
287 "%{mmacosx-version-min=*: -platform_version macos %* 0.0} "
288 #else
289 #define DARWIN_PLATFORM_ID \
290 "%{mmacosx-version-min=*:-macosx_version_min %*} "
291 #endif
292
293 /* Code built with mdynamic-no-pic does not support PIE/PIC, so we disallow
294 these combinations; we also ensure that the no_pie option is passed to
295 ld64 on system versions that default to PIE when mdynamic-no-pic is given.
296 FIXME: we should check that the linker supports the -pie and -no_pie.
297 options. */
298 #define DARWIN_PIE_SPEC \
299 "%{pie|fpie|fPIE:\
300 %{mdynamic-no-pic: \
301 %n'-mdynamic-no-pic' overrides '-pie', '-fpie' or '-fPIE'; \
302 :%:version-compare(>= 10.5 mmacosx-version-min= -pie) }; \
303 mdynamic-no-pic:%:version-compare(>= 10.7 mmacosx-version-min= -no_pie) } "
304
305 #define DARWIN_NOPIE_SPEC \
306 "%{no-pie|fno-pie|fno-PIE: \
307 %:version-compare(>= 10.7 mmacosx-version-min= -no_pie) }"
308
309 #define DARWIN_CC1_SPEC \
310 "%<dynamic %<dynamiclib %<force_cpusubtype_ALL %<multiply_defined* "
311
312 #define SUBSUBTARGET_OVERRIDE_OPTIONS \
313 do { \
314 darwin_override_options (); \
315 } while (0)
316
317 #define SUBTARGET_C_COMMON_OVERRIDE_OPTIONS do { \
318 if (flag_mkernel || flag_apple_kext) \
319 { \
320 if (flag_use_cxa_atexit == 2) \
321 flag_use_cxa_atexit = 0; \
322 /* kexts should always be built without the coalesced sections \
323 because the kernel loader doesn't grok such sections. */ \
324 flag_weak = 0; \
325 /* No RTTI in kexts. */ \
326 flag_rtti = 0; \
327 } \
328 } while (0)
329
330 /* Machine dependent cpp options. Don't add more options here, add
331 them to darwin_cpp_builtins in darwin-c.cc. */
332
333 #undef CPP_SPEC
334 #define CPP_SPEC "%{static:%{!dynamic:-D__STATIC__}}%{!static:-D__DYNAMIC__}" \
335 " %{pthread:-D_REENTRANT} "
336
337 /* This is a fix for PR41260 by passing -no_compact_unwind on darwin10 and
338 later until the assembler, linker and libunwind are able to deal with the
339 output from GCC.
340
341 FIXME: we should check that the linker supports the option.
342 */
343
344 #define DARWIN_NOCOMPACT_UNWIND \
345 " %:version-compare(>= 10.6 mmacosx-version-min= -no_compact_unwind) "
346
347 /* In Darwin linker specs we can put -lcrt0.o and ld will search the library
348 path for crt0.o or -lcrtx.a and it will search for libcrtx.a. As for
349 other ports, we can also put xxx.{o,a}%s and get the appropriate complete
350 startfile absolute directory. This latter point is important when we want
351 to override ld's rule of .dylib being found ahead of .a and the user wants
352 the convenience library to be linked. */
353
354 /* The LINK_COMMAND spec is mostly a clone of the standard LINK_COMMAND_SPEC,
355 plus precomp, libtool, and fat build additions.
356
357 In general, random Darwin linker flags should go into LINK_SPEC
358 instead of LINK_COMMAND_SPEC. The command spec is better for
359 specifying the handling of options understood by generic Unix
360 linkers, and for positional arguments like libraries. */
361
362 #define LINK_COMMAND_SPEC_A \
363 "%{!c:%{!E:%{!S:%{!M:%{!MM:%{!fsyntax-only:%{!fdump=*: \
364 %(linker)" \
365 DARWIN_LD_DEMANGLE \
366 LINK_PLUGIN_SPEC \
367 "%{flto*:%<fcompare-debug*} \
368 %{flto} %{fno-lto} %{flto=*} \
369 %l " \
370 DARWIN_PLATFORM_ID \
371 LINK_COMPRESS_DEBUG_SPEC \
372 "%X %{s} %{t} %{Z} %{u*} \
373 %{e*} %{r} \
374 %{o*}%{!o:-o a.out} \
375 %{!r:%{!nostdlib:%{!nostartfiles:%S}}} \
376 %{L*} %(link_libgcc) %o \
377 %{!r:%{!nostdlib:%{!nodefaultlibs:\
378 %{fprofile-arcs|fprofile-generate*|coverage:-lgcov} \
379 %{fopenacc|fopenmp|%:gt(%{ftree-parallelize-loops=*:%*} 1): \
380 %{static|static-libgcc|static-libstdc++|static-libgfortran: \
381 libgomp.a%s; : -lgomp }} \
382 %{fgnu-tm: \
383 %{static|static-libgcc|static-libstdc++|static-libgfortran: \
384 libitm.a%s; : -litm }} \
385 %{%:sanitize(address): -lasan } \
386 %{%:sanitize(undefined): -lubsan } \
387 %(link_ssp) \
388 %:version-compare(>< 10.6 10.7 mmacosx-version-min= -ld10-uwfef) \
389 %(link_gcc_c_sequence) \
390 %{!nodefaultexport:%{dylib|dynamiclib|bundle: \
391 %:version-compare(>= 10.11 asm_macosx_version_min= -U) \
392 %:version-compare(>= 10.11 asm_macosx_version_min= ___emutls_get_address) \
393 %:version-compare(>= 10.11 asm_macosx_version_min= -exported_symbol) \
394 %:version-compare(>= 10.11 asm_macosx_version_min= ___emutls_get_address) \
395 %:version-compare(>= 10.11 asm_macosx_version_min= -U) \
396 %:version-compare(>= 10.11 asm_macosx_version_min= ___emutls_register_common) \
397 %:version-compare(>= 10.11 asm_macosx_version_min= -exported_symbol) \
398 %:version-compare(>= 10.11 asm_macosx_version_min= ___emutls_register_common) \
399 }} \
400 }}}\
401 %{!r:%{!nostdlib:%{!nostartfiles:%E}}} %{T*} %{F*} "\
402 DARWIN_PIE_SPEC \
403 DARWIN_NOPIE_SPEC \
404 DARWIN_RDYNAMIC \
405 DARWIN_NOCOMPACT_UNWIND \
406 "}}}}}}} %<pie %<no-pie %<rdynamic %<X %<rpath "
407
408 /* Spec that controls whether the debug linker is run automatically for
409 a link step. This needs to be done if there is a source file on the
410 command line which will result in a temporary object (and debug is
411 enabled). */
412
413 #define DSYMUTIL_SPEC \
414 "%{!c:%{!E:%{!S:%{!r:%{!M:%{!MM:%{!fsyntax-only:%{!fdump=*:\
415 %{g*:%{!gctf:%{!gbtf:%{%:debug-level-gt(0): -idsym \
416 %{.c|.cc|.C|.cpp|.cp|.c++|.cxx|.CPP|.m|.mm|.s|.f|.f90|\
417 .f95|.f03|.f77|.for|.F|.F90|.F95|.F03|.d: -dsym }\
418 }}}}\
419 }}}}}}}}"
420
421 #define LINK_COMMAND_SPEC LINK_COMMAND_SPEC_A DSYMUTIL_SPEC
422
423 /* Tell collect2 to run dsymutil for us as necessary. */
424 #define COLLECT_RUN_DSYMUTIL 1
425
426 /* We only want one instance of %G, since libSystem (Darwin's -lc) does not
427 depend on libgcc. */
428 #undef LINK_GCC_C_SEQUENCE_SPEC
429 #define LINK_GCC_C_SEQUENCE_SPEC \
430 "%G %{!nolibc:%L} "
431
432 /* ld64 supports a sysroot, it just has a different name and there's no easy
433 way to check for it at config time. */
434 #undef HAVE_LD_SYSROOT
435 #define HAVE_LD_SYSROOT 1
436 /* It seems the only (working) way to get a space after %R is to append a
437 dangling '/'. */
438 #define SYSROOT_SPEC "%{!isysroot*:-syslibroot %R/ } "
439
440 /* Do the same as clang, for now, and insert the sysroot for ld when an
441 isysroot is specified. */
442 #define LINK_SYSROOT_SPEC "%{isysroot*:-syslibroot %*} "
443
444 /* Suppress the addition of extra prefix paths when a sysroot is in use. */
445 #define STANDARD_STARTFILE_PREFIX_1 ""
446 #define STANDARD_STARTFILE_PREFIX_2 ""
447
448
449 /* Please keep the random linker options in alphabetical order.
450 Note that options taking arguments may appear multiple times on a command
451 line with different arguments each time, so put a * after their names so
452 all of them get passed. */
453 #define LINK_SPEC \
454 "%{static}%{!static:%{!dynamic:-dynamic}} \
455 %:remove-outfile(-ldl) \
456 %:remove-outfile(-lm) \
457 %:remove-outfile(-lpthread) \
458 %{fgnu-runtime: %{static|static-libgcc: \
459 %:replace-outfile(-lobjc libobjc-gnu.a%s); \
460 :%:replace-outfile(-lobjc -lobjc-gnu )}}\
461 %{static|static-libgcc|static-libgfortran:%:replace-outfile(-lgfortran libgfortran.a%s)}\
462 %{static|static-libgcc|static-libquadmath:%:replace-outfile(-lquadmath libquadmath.a%s)}\
463 %{static|static-libgcc|static-libphobos:%:replace-outfile(-lgphobos libgphobos.a%s)}\
464 %{static|static-libgcc|static-libstdc++|static-libgfortran:%:replace-outfile(-lgomp libgomp.a%s)}\
465 %{static|static-libgcc|static-libstdc++:%:replace-outfile(-lstdc++ libstdc++.a%s)}\
466 %{static|static-libgm2:%:replace-outfile(-lm2pim libm2pim.a%s)}\
467 %{static|static-libgm2:%:replace-outfile(-lm2iso libm2iso.a%s)}\
468 %{static|static-libgm2:%:replace-outfile(-lm2min libm2min.a%s)}\
469 %{static|static-libgm2:%:replace-outfile(-lm2log libm2log.a%s)}\
470 %{static|static-libgm2:%:replace-outfile(-lm2cor libm2cor.a%s)}\
471 %{force_cpusubtype_ALL:-arch %(darwin_arch)} \
472 %{!force_cpusubtype_ALL:-arch %(darwin_subarch)} "\
473 LINK_SYSROOT_SPEC \
474 "%{!multiply_defined*:%{shared-libgcc: \
475 %:version-compare(< 10.5 mmacosx-version-min= -multiply_defined) \
476 %:version-compare(< 10.5 mmacosx-version-min= suppress) }} \
477 %{sectalign*} %{sectcreate*} %{sectobjectsymbols*} %{sectorder*} \
478 %{segaddr*} %{segcreate*} %{segprot*} "
479
480 /* Machine dependent libraries. */
481
482 #define LIB_SPEC "%{!static:-lSystem}"
483
484 /* Note that by default, -lgcc_eh (which provides a statically-linked unwinder)
485 is not used. This is because, in general, we need to unwind through system
486 libraries that are linked with the shared unwinder in libunwind (or libgcc_s
487 for OSX 10.4/5 [darwin8/9]).
488
489 When -static-libgcc is forced: < 10.6, use the unwinder in libgcc_eh (and
490 find the emultls impl. there too).
491
492 For -static-libgcc: >= 10.6, the unwinder *still* comes from libSystem and
493 we find the emutls impl from lemutls_w. In either case, the builtins etc.
494 are linked from -lgcc. The eh library is still available so that it could
495 be specified explicitly if there is some reason to do so.
496
497 When we have specified shared-libgcc or any case that might require
498 exceptions, we pull the libgcc content (including emulated tls) from
499 -lgcc_s.1.1 in GCC and the unwinder from /usr/lib/libgcc_s.1 for < 10.6 and
500 libSystem for >= 10.6 respectively.
501 Otherwise, we just link the emutls/builtins from convenience libs.
502
503 We have to work around that DYLD_XXXX are disabled in macOS 10.11+ which
504 means that any bootstrap trying to use a shared libgcc with a bumped SO-
505 name will fail. This means that we do not accept shared libgcc for these
506 versions (the primary reason for forcing a shared libgcc was that it
507 contained the unwinder on Darwin8 and 9).
508
509 When using the shared version of gcc_s.1.1 the unwinder is provided by:
510 * Prior to 10.3.9, then we have to link the static eh lib, since there
511 is no shared unwinder version on the system.
512 * from 10.3.9 to 10.5, from /usr/lib/libgcc_s.1.dylib
513 * from 10.6 onwards, from libSystem.dylib
514 */
515 #undef REAL_LIBGCC_SPEC
516 #define REAL_LIBGCC_SPEC \
517 "%{static-libgcc|static: \
518 %:version-compare(!> 10.6 mmacosx-version-min= -lgcc_eh) \
519 %:version-compare(>= 10.6 mmacosx-version-min= -lemutls_w); \
520 shared-libgcc|fexceptions|fobjc-exceptions|fgnu-runtime: \
521 %:version-compare(!> 10.11 mmacosx-version-min= -lgcc_s.1.1) \
522 %:version-compare(>= 10.11 mmacosx-version-min= -lemutls_w) \
523 %:version-compare(!> 10.3.9 mmacosx-version-min= -lgcc_eh) \
524 %:version-compare(>< 10.3.9 10.5 mmacosx-version-min= -lgcc_s.10.4) \
525 %:version-compare(>< 10.5 10.6 mmacosx-version-min= -lgcc_s.10.5); \
526 : -lemutls_w \
527 } -lgcc "
528
529 /* We specify crt0.o as -lcrt0.o so that ld will search the library path. */
530
531 #undef STARTFILE_SPEC
532 #define STARTFILE_SPEC \
533 "%{dynamiclib: %(darwin_dylib1) %{fgnu-tm: -lcrttms.o}} \
534 %{!dynamiclib:%{bundle:%(darwin_bundle1)} \
535 %{!bundle:%{pg:%{static:-lgcrt0.o} \
536 %{!static:%{object:-lgcrt0.o} \
537 %{!object:%{preload:-lgcrt0.o} \
538 %{!preload:-lgcrt1.o \
539 %:version-compare(>= 10.8 mmacosx-version-min= -no_new_main) \
540 %(darwin_crt2)}}}} \
541 %{!pg:%{static:-lcrt0.o} \
542 %{!static:%{object:-lcrt0.o} \
543 %{!object:%{preload:-lcrt0.o} \
544 %{!preload: %(darwin_crt1) \
545 %(darwin_crt2)}}}}}} \
546 %(darwin_crt3) %<dynamiclib "
547
548 /* We want a destructor last in the list. */
549 #define TM_DESTRUCTOR "%{fgnu-tm: -lcrttme.o}"
550 #define ENDFILE_SPEC TM_DESTRUCTOR
551
552 #define DARWIN_EXTRA_SPECS \
553 { "darwin_crt1", DARWIN_CRT1_SPEC }, \
554 { "darwin_crt2", DARWIN_CRT2_SPEC }, \
555 { "darwin_crt3", DARWIN_CRT3_SPEC }, \
556 { "darwin_dylib1", DARWIN_DYLIB1_SPEC }, \
557 { "darwin_bundle1", DARWIN_BUNDLE1_SPEC },
558
559 #define DARWIN_CRT1_SPEC \
560 "%:version-compare(!> 10.5 mmacosx-version-min= -lcrt1.o) \
561 %:version-compare(>< 10.5 10.6 mmacosx-version-min= -lcrt1.10.5.o) \
562 %:version-compare(>< 10.6 10.8 mmacosx-version-min= -lcrt1.10.6.o) \
563 %{fgnu-tm: -lcrttms.o}"
564
565 #define DARWIN_CRT2_SPEC ""
566
567 /* crt3.o provides __cxa_atexit on systems that don't have it (and a fix
568 up for faulty versions on 10.4). Since it's only used with C++, which
569 requires passing -shared-libgcc, key off that to avoid unnecessarily
570 adding a destructor to every program built for 10.4 or earlier. */
571
572 #define DARWIN_CRT3_SPEC \
573 "%{shared-libgcc:%:version-compare(< 10.5 mmacosx-version-min= crt3.o%s)}"
574
575 #define DARWIN_DYLIB1_SPEC \
576 "%:version-compare(!> 10.5 mmacosx-version-min= -ldylib1.o) \
577 %:version-compare(>< 10.5 10.6 mmacosx-version-min= -ldylib1.10.5.o)"
578
579 #define DARWIN_BUNDLE1_SPEC \
580 "%{!static:%:version-compare(< 10.6 mmacosx-version-min= -lbundle1.o) \
581 %{fgnu-tm: -lcrttms.o}}"
582
583 #ifdef HAVE_AS_MMACOSX_VERSION_MIN_OPTION
584 /* Emit macosx version (but only major). */
585 #define ASM_MMACOSX_VERSION_MIN_SPEC \
586 "%{asm_macosx_version_min=*: -mmacosx-version-min=%* } \
587 %<asm_macosx_version_min=* "
588 #else
589 #define ASM_MMACOSX_VERSION_MIN_SPEC " %<asm_macosx_version_min=* "
590 #endif
591
592 #if HAVE_GNU_AS
593 /* The options are added in gcc.cc for this case. */
594 #define ASM_OPTIONS ""
595 #else
596 /* When we detect that we're cctools or llvm as, we need to insert the right
597 additional options. Actually, currently these are the same as GAS. */
598 #define ASM_OPTIONS "%{v} %{w:-W} %{I*}"
599 #endif
600
601 /* Default Darwin ASM_SPEC, very simple. */
602 #define ASM_SPEC \
603 "%{static} -arch %(darwin_arch) " \
604 ASM_OPTIONS ASM_MMACOSX_VERSION_MIN_SPEC
605
606 #define ASM_DEBUG_SPEC ""
607 #undef ASM_DEBUG_OPTION_SPEC
608 #define ASM_DEBUG_OPTION_SPEC ""
609
610 #define ASM_FINAL_SPEC \
611 "%{gsplit-dwarf:%ngsplit-dwarf is not supported on this platform} \
612 %<gsplit-dwarf"
613
614 /* We now require C++11 to bootstrap and newer tools than those based on
615 stabs, so require DWARF-2, even if stabs is supported by the assembler. */
616
617 #define DWARF2_DEBUGGING_INFO 1
618 #define PREFERRED_DEBUGGING_TYPE DWARF2_DEBUG
619
620 #define DEBUG_FRAME_SECTION "__DWARF,__debug_frame,regular,debug"
621 #define DEBUG_INFO_SECTION "__DWARF,__debug_info,regular,debug"
622 #define DEBUG_ABBREV_SECTION "__DWARF,__debug_abbrev,regular,debug"
623 #define DEBUG_ARANGES_SECTION "__DWARF,__debug_aranges,regular,debug"
624 #define DEBUG_MACINFO_SECTION "__DWARF,__debug_macinfo,regular,debug"
625 #define DEBUG_LINE_SECTION "__DWARF,__debug_line,regular,debug"
626 #define DEBUG_LOC_SECTION "__DWARF,__debug_loc,regular,debug"
627 #define DEBUG_LOCLISTS_SECTION "__DWARF,__debug_loclists,regular,debug"
628
629 #define DEBUG_STR_SECTION "__DWARF,__debug_str,regular,debug"
630 #define DEBUG_STR_OFFSETS_SECTION "__DWARF,__debug_str_offs,regular,debug"
631 #define DEBUG_RANGES_SECTION "__DWARF,__debug_ranges,regular,debug"
632 #define DEBUG_RNGLISTS_SECTION "__DWARF,__debug_rnglists,regular,debug"
633 #define DEBUG_MACRO_SECTION "__DWARF,__debug_macro,regular,debug"
634
635 #define DEBUG_LTO_INFO_SECTION "__GNU_DWARF_LTO,__debug_info,regular,debug"
636 #define DEBUG_LTO_ABBREV_SECTION "__GNU_DWARF_LTO,__debug_abbrev,regular,debug"
637 #define DEBUG_LTO_MACINFO_SECTION "__GNU_DWARF_LTO,__debug_macinfo,regular,debug"
638 #define DEBUG_LTO_LINE_SECTION "__GNU_DWARF_LTO,__debug_line,regular,debug"
639 #define DEBUG_LTO_STR_SECTION "__GNU_DWARF_LTO,__debug_str,regular,debug"
640 #define DEBUG_LTO_MACRO_SECTION "__GNU_DWARF_LTO,__debug_macro,regular,debug"
641
642 #define TARGET_WANT_DEBUG_PUB_SECTIONS true
643 #define DEBUG_PUBNAMES_SECTION ((debug_generate_pub_sections == 2) \
644 ? "__DWARF,__debug_gnu_pubn,regular,debug" \
645 : "__DWARF,__debug_pubnames,regular,debug")
646
647 #define DEBUG_PUBTYPES_SECTION ((debug_generate_pub_sections == 2) \
648 ? "__DWARF,__debug_gnu_pubt,regular,debug" \
649 : "__DWARF,__debug_pubtypes,regular,debug")
650
651 /* GCC's definition of 'one_only' is the same as its definition of 'weak'. */
652 #define MAKE_DECL_ONE_ONLY(DECL) (DECL_WEAK (DECL) = 1)
653
654 /* Mach-O supports 'weak imports', and 'weak definitions' in coalesced
655 sections. machopic_select_section ensures that weak variables go in
656 coalesced sections. Weak aliases (or any other kind of aliases) are
657 not supported. Weak symbols that aren't visible outside the .s file
658 are not supported. */
659 #define ASM_WEAKEN_DECL(FILE, DECL, NAME, ALIAS) \
660 do { \
661 if (ALIAS) \
662 { \
663 warning (0, "alias definitions not supported in Mach-O; ignored"); \
664 break; \
665 } \
666 \
667 if (! DECL_EXTERNAL (DECL) && TREE_PUBLIC (DECL)) \
668 targetm.asm_out.globalize_label (FILE, NAME); \
669 if (DECL_EXTERNAL (DECL)) \
670 fputs ("\t.weak_reference ", FILE); \
671 else if (lookup_attribute ("weak_import", DECL_ATTRIBUTES (DECL))) \
672 break; \
673 else if (TREE_PUBLIC (DECL)) \
674 fputs ("\t.weak_definition ", FILE); \
675 else \
676 break; \
677 assemble_name (FILE, NAME); \
678 fputc ('\n', FILE); \
679 } while (0)
680
681 /* Darwin has the pthread routines in libSystem, which every program
682 links to, so there's no need for weak-ness for that. */
683 #define GTHREAD_USE_WEAK 0
684
685 /* On Darwin, we don't (at the time of writing) have linkonce sections
686 with names, so it's safe to make the class data not comdat. */
687 #define TARGET_CXX_CLASS_DATA_ALWAYS_COMDAT hook_bool_void_false
688
689 /* For efficiency, on Darwin the RTTI information that is always
690 emitted in the standard C++ library should not be COMDAT. */
691 #define TARGET_CXX_LIBRARY_RTTI_COMDAT hook_bool_void_false
692
693 /* We make exception information linkonce. */
694 #undef TARGET_USES_WEAK_UNWIND_INFO
695 #define TARGET_USES_WEAK_UNWIND_INFO 1
696
697 /* We need to use a nonlocal label for the start of an EH frame: the
698 Darwin linker requires that a coalesced section start with a label.
699 Unfortunately, it also requires that 'debug' sections don't contain
700 labels. */
701 #undef FRAME_BEGIN_LABEL
702 #define FRAME_BEGIN_LABEL (for_eh ? "EH_frame" : "Lframe")
703
704 /* Emit a label for the FDE corresponding to DECL. EMPTY means
705 emit a label for an empty FDE. */
706 #define TARGET_ASM_EMIT_UNWIND_LABEL darwin_emit_unwind_label
707
708 /* Emit a label to separate the exception table. */
709 #define TARGET_ASM_EMIT_EXCEPT_TABLE_LABEL darwin_emit_except_table_label
710
711 /* Make an EH (personality or LDSA) symbol indirect as needed. */
712 #define TARGET_ASM_MAKE_EH_SYMBOL_INDIRECT darwin_make_eh_symbol_indirect
713
714 /* Some of Darwin's unwinders need current frame address state to be reset
715 after a DW_CFA_restore_state recovers the register values. */
716 #undef TARGET_ASM_SHOULD_RESTORE_CFA_STATE
717 #define TARGET_ASM_SHOULD_RESTORE_CFA_STATE darwin_should_restore_cfa_state
718
719 /* Our profiling scheme doesn't LP labels and counter words. */
720
721 #define NO_PROFILE_COUNTERS 1
722
723 #undef INIT_SECTION_ASM_OP
724 #define INIT_SECTION_ASM_OP ""
725
726 #undef INVOKE__main
727
728 #define TARGET_ASM_CONSTRUCTOR machopic_asm_out_constructor
729 #define TARGET_ASM_DESTRUCTOR machopic_asm_out_destructor
730
731 /* Always prefix with an underscore. */
732
733 #define USER_LABEL_PREFIX "_"
734
735 /* A dummy symbol that will be replaced with the function base name. */
736 #define MACHOPIC_FUNCTION_BASE_NAME "<pic base>"
737
738 /* Don't output a .file directive. That is only used by the assembler for
739 error reporting. */
740 #undef TARGET_ASM_FILE_START_FILE_DIRECTIVE
741 #define TARGET_ASM_FILE_START_FILE_DIRECTIVE false
742
743 #undef TARGET_ASM_FILE_END
744 #define TARGET_ASM_FILE_END darwin_file_end
745
746 /* Because Mach-O relocations have a counter from 1 to 255 for the
747 section number they apply to, it is necessary to output all
748 normal sections before the LTO sections, to make sure that the
749 sections that may have relocations always have a section number
750 smaller than 255. */
751 #undef TARGET_ASM_LTO_START
752 #define TARGET_ASM_LTO_START darwin_asm_lto_start
753 #undef TARGET_ASM_LTO_END
754 #define TARGET_ASM_LTO_END darwin_asm_lto_end
755
756 #define ASM_OUTPUT_SKIP(FILE,SIZE) \
757 fprintf (FILE, "\t.space " HOST_WIDE_INT_PRINT_UNSIGNED"\n", SIZE)
758
759 /* Give ObjC methods pretty symbol names. */
760
761 #undef OBJC_GEN_METHOD_LABEL
762 #define OBJC_GEN_METHOD_LABEL(BUF,IS_INST,CLASS_NAME,CAT_NAME,SEL_NAME,NUM) \
763 do { if (CAT_NAME) \
764 sprintf (BUF, "%c[%s(%s) %s]", (IS_INST) ? '-' : '+', \
765 (CLASS_NAME), (CAT_NAME), (SEL_NAME)); \
766 else \
767 sprintf (BUF, "%c[%s %s]", (IS_INST) ? '-' : '+', \
768 (CLASS_NAME), (SEL_NAME)); \
769 } while (0)
770
771 #undef ASM_DECLARE_OBJECT_NAME
772 #define ASM_DECLARE_OBJECT_NAME(FILE, NAME, DECL) \
773 darwin_asm_declare_object_name ((FILE), (NAME), (DECL))
774
775 /* The RTTI data (e.g., __ti4name) is common and public (and static),
776 but it does need to be referenced via indirect PIC data pointers.
777 The machopic_define_symbol calls are telling the machopic subsystem
778 that the name *is* defined in this module, so it doesn't need to
779 make them indirect. */
780
781 #undef ASM_DECLARE_FUNCTION_NAME
782 #define ASM_DECLARE_FUNCTION_NAME(FILE, NAME, DECL) \
783 do { \
784 const char *xname = NAME; \
785 if (GET_CODE (XEXP (DECL_RTL (DECL), 0)) != SYMBOL_REF) \
786 xname = IDENTIFIER_POINTER (DECL_NAME (DECL)); \
787 if (! DECL_WEAK (DECL) \
788 && ((TREE_STATIC (DECL) \
789 && (!DECL_COMMON (DECL) || !TREE_PUBLIC (DECL))) \
790 || DECL_INITIAL (DECL))) \
791 machopic_define_symbol (DECL_RTL (DECL)); \
792 if ((TREE_STATIC (DECL) \
793 && (!DECL_COMMON (DECL) || !TREE_PUBLIC (DECL))) \
794 || DECL_INITIAL (DECL)) \
795 (* targetm.encode_section_info) (DECL, DECL_RTL (DECL), false); \
796 ASM_OUTPUT_FUNCTION_LABEL (FILE, xname, DECL); \
797 } while (0)
798
799 #undef TARGET_ASM_DECLARE_CONSTANT_NAME
800 #define TARGET_ASM_DECLARE_CONSTANT_NAME darwin_asm_declare_constant_name
801
802 /* Wrap new method names in quotes so the assembler doesn't gag.
803 Make Objective-C internal symbols local and in doing this, we need
804 to accommodate the name mangling done by c++ on file scope locals. */
805
806 int darwin_label_is_anonymous_local_objc_name (const char *name);
807
808 #undef ASM_OUTPUT_LABELREF
809 #define ASM_OUTPUT_LABELREF(FILE,NAME) \
810 do { \
811 const char *xname = (NAME); \
812 if (! strcmp (xname, MACHOPIC_FUNCTION_BASE_NAME)) \
813 machopic_output_function_base_name(FILE); \
814 else if (xname[0] == '&' || xname[0] == '*') \
815 { \
816 int len = strlen (xname); \
817 if (len > 6 && !strcmp ("$stub", xname + len - 5)) \
818 machopic_validate_stub_or_non_lazy_ptr (xname); \
819 else if (len > 7 && !strcmp ("$stub\"", xname + len - 6)) \
820 machopic_validate_stub_or_non_lazy_ptr (xname); \
821 else if (len > 14 && !strcmp ("$non_lazy_ptr", xname + len - 13)) \
822 machopic_validate_stub_or_non_lazy_ptr (xname); \
823 else if (len > 15 && !strcmp ("$non_lazy_ptr\"", xname + len - 14)) \
824 machopic_validate_stub_or_non_lazy_ptr (xname); \
825 if (xname[1] != '"' && name_needs_quotes (&xname[1])) \
826 fprintf (FILE, "\"%s\"", &xname[1]); \
827 else \
828 fputs (&xname[1], FILE); \
829 } \
830 else if (xname[0] == '+' || xname[0] == '-') \
831 fprintf (FILE, "\"%s\"", xname); \
832 else if (darwin_label_is_anonymous_local_objc_name (xname)) \
833 fprintf (FILE, "L%s", xname); \
834 else if (xname[0] != '"' && name_needs_quotes (xname)) \
835 asm_fprintf (FILE, "\"%U%s\"", xname); \
836 else \
837 asm_fprintf (FILE, "%U%s", xname); \
838 } while (0)
839
840 /* Output before executable code. */
841 #undef TEXT_SECTION_ASM_OP
842 #define TEXT_SECTION_ASM_OP "\t.text"
843
844 /* Output before writable data. */
845
846 #undef DATA_SECTION_ASM_OP
847 #define DATA_SECTION_ASM_OP "\t.data"
848
849 #undef ALIGN_ASM_OP
850 #define ALIGN_ASM_OP ".align"
851
852 #undef ASM_OUTPUT_ALIGN
853 #define ASM_OUTPUT_ALIGN(FILE,LOG) \
854 if ((LOG) != 0) \
855 fprintf (FILE, "\t%s\t%d\n", ALIGN_ASM_OP, (LOG))
856
857 /* The maximum alignment which the object file format can support in bits
858 which depends on the OS version and whether the object is a common
859 variable. */
860
861 #undef MAX_OFILE_ALIGNMENT
862 #define MAX_OFILE_ALIGNMENT ((1U << L2_MAX_OFILE_ALIGNMENT) * 8U)
863
864 /* These are the three variants that emit referenced blank space. */
865 #define ASM_OUTPUT_ALIGNED_BSS(FILE, DECL, NAME, SIZE, ALIGN) \
866 darwin_output_aligned_bss ((FILE), (DECL), (NAME), (SIZE), (ALIGN))
867
868 #undef ASM_OUTPUT_ALIGNED_DECL_LOCAL
869 #define ASM_OUTPUT_ALIGNED_DECL_LOCAL(FILE, DECL, NAME, SIZE, ALIGN) \
870 darwin_asm_output_aligned_decl_local \
871 ((FILE), (DECL), (NAME), (SIZE), (ALIGN))
872
873 #undef ASM_OUTPUT_ALIGNED_DECL_COMMON
874 #define ASM_OUTPUT_ALIGNED_DECL_COMMON(FILE, DECL, NAME, SIZE, ALIGN) \
875 darwin_asm_output_aligned_decl_common \
876 ((FILE), (DECL), (NAME), (SIZE), (ALIGN))
877
878 /* The generic version, archs should over-ride where required. */
879 #define MACHOPIC_NL_SYMBOL_PTR_SECTION ".non_lazy_symbol_pointer"
880
881 /* Declare the section variables. */
882 #ifndef USED_FOR_TARGET
883 enum darwin_section_enum {
884 #define DEF_SECTION(NAME, FLAGS, DIRECTIVE, OBJC) NAME,
885 #include "darwin-sections.def"
886 #undef DEF_SECTION
887 NUM_DARWIN_SECTIONS
888 };
889 extern GTY(()) section * darwin_sections[NUM_DARWIN_SECTIONS];
890 #endif
891
892 #undef TARGET_ASM_SELECT_SECTION
893 #define TARGET_ASM_SELECT_SECTION machopic_select_section
894
895 #undef TARGET_ASM_FUNCTION_SECTION
896 #define TARGET_ASM_FUNCTION_SECTION darwin_function_section
897
898 #undef TARGET_ASM_SELECT_RTX_SECTION
899 #define TARGET_ASM_SELECT_RTX_SECTION machopic_select_rtx_section
900 #undef TARGET_ASM_UNIQUE_SECTION
901 #define TARGET_ASM_UNIQUE_SECTION darwin_unique_section
902 #undef TARGET_ASM_FUNCTION_RODATA_SECTION
903 #define TARGET_ASM_FUNCTION_RODATA_SECTION default_no_function_rodata_section
904
905 #undef TARGET_ASM_TM_CLONE_TABLE_SECTION
906 #define TARGET_ASM_TM_CLONE_TABLE_SECTION darwin_tm_clone_table_section
907
908 #undef TARGET_ASM_RELOC_RW_MASK
909 #define TARGET_ASM_RELOC_RW_MASK machopic_reloc_rw_mask
910
911 /* Globalizing directive for a label. */
912 #define GLOBAL_ASM_OP "\t.globl "
913 #define TARGET_ASM_GLOBALIZE_LABEL darwin_globalize_label
914
915 /* Emit an assembler directive to set visibility for a symbol. Used
916 to support visibility attribute and Darwin's private extern
917 feature. */
918 #undef TARGET_ASM_ASSEMBLE_VISIBILITY
919 #define TARGET_ASM_ASSEMBLE_VISIBILITY darwin_assemble_visibility
920
921 /* Extra attributes for Darwin. */
922 #define SUBTARGET_ATTRIBUTE_TABLE \
923 /* { name, min_len, max_len, decl_req, type_req, fn_type_req, \
924 affects_type_identity, handler, exclude } */ \
925 { "apple_kext_compatibility", 0, 0, false, true, false, false, \
926 darwin_handle_kext_attribute, NULL }, \
927 { "weak_import", 0, 0, true, false, false, false, \
928 darwin_handle_weak_import_attribute, NULL }
929
930 /* Make local constant labels linker-visible, so that if one follows a
931 weak_global constant, ld64 will be able to separate the atoms. */
932 #undef ASM_GENERATE_INTERNAL_LABEL
933 #define ASM_GENERATE_INTERNAL_LABEL(LABEL,PREFIX,NUM) \
934 do { \
935 if (strcmp ("LC", PREFIX) == 0) \
936 sprintf (LABEL, "*%s%ld", "lC", (long)(NUM)); \
937 else if (strcmp ("Lubsan_data", PREFIX) == 0) \
938 sprintf (LABEL, "*%s%ld", "lubsan_data", (long)(NUM));\
939 else if (strcmp ("Lubsan_type", PREFIX) == 0) \
940 sprintf (LABEL, "*%s%ld", "lubsan_type", (long)(NUM));\
941 else if (strcmp ("LASAN", PREFIX) == 0) \
942 sprintf (LABEL, "*%s%ld", "lASAN", (long)(NUM));\
943 else if (strcmp ("LTRAMP", PREFIX) == 0) \
944 sprintf (LABEL, "*%s%ld", "lTRAMP", (long)(NUM));\
945 else \
946 sprintf (LABEL, "*%s%ld", PREFIX, (long)(NUM)); \
947 } while (0)
948
949 #undef TARGET_ASM_MARK_DECL_PRESERVED
950 #define TARGET_ASM_MARK_DECL_PRESERVED darwin_mark_decl_preserved
951
952 /* Any port using this header needs to define the first available
953 subtarget symbol bit: SYMBOL_FLAG_SUBT_DEP. */
954
955 /* Is a variable. */
956 #define MACHO_SYMBOL_FLAG_VARIABLE (SYMBOL_FLAG_SUBT_DEP)
957 #define MACHO_SYMBOL_VARIABLE_P(RTX) \
958 ((SYMBOL_REF_FLAGS (RTX) & MACHO_SYMBOL_FLAG_VARIABLE) != 0)
959
960 /* Set on a symbol that must be indirected, even when there is a
961 definition in the TU. The ABI mandates that common symbols are so
962 indirected, as are weak. If 'fix-and-continue' is operational then
963 data symbols might also be. */
964
965 #define MACHO_SYMBOL_FLAG_MUST_INDIRECT ((SYMBOL_FLAG_SUBT_DEP) << 1)
966 #define MACHO_SYMBOL_MUST_INDIRECT_P(RTX) \
967 ((SYMBOL_REF_FLAGS (RTX) & MACHO_SYMBOL_FLAG_MUST_INDIRECT) != 0)
968
969 /* Set on a symbol with SYMBOL_FLAG_FUNCTION or MACHO_SYMBOL_FLAG_VARIABLE
970 to indicate that the function or variable is considered defined in this
971 translation unit. */
972
973 #define MACHO_SYMBOL_FLAG_DEFINED ((SYMBOL_FLAG_SUBT_DEP) << 2)
974 #define MACHO_SYMBOL_DEFINED_P(RTX) \
975 ((SYMBOL_REF_FLAGS (RTX) & MACHO_SYMBOL_FLAG_DEFINED) != 0)
976
977 /* Set on a symbol that has specified non-default visibility. */
978
979 #define MACHO_SYMBOL_FLAG_HIDDEN_VIS ((SYMBOL_FLAG_SUBT_DEP) << 3)
980 #define MACHO_SYMBOL_HIDDEN_VIS_P(RTX) \
981 ((SYMBOL_REF_FLAGS (RTX) & MACHO_SYMBOL_FLAG_HIDDEN_VIS) != 0)
982
983 /* Set on a symbol that should be made visible to the linker (overriding
984 'L' symbol prefixes). */
985
986 #define MACHO_SYMBOL_FLAG_LINKER_VIS ((SYMBOL_FLAG_SUBT_DEP) << 4)
987 #define MACHO_SYMBOL_LINKER_VIS_P(RTX) \
988 ((SYMBOL_REF_FLAGS (RTX) & MACHO_SYMBOL_FLAG_LINKER_VIS) != 0)
989
990 /* Set on a symbol that is a pic stub or symbol indirection (i.e. the
991 L_xxxxx${stub,non_lazy_ptr,lazy_ptr}. */
992
993 #define MACHO_SYMBOL_FLAG_INDIRECTION ((SYMBOL_FLAG_SUBT_DEP) << 5)
994 #define MACHO_SYMBOL_INDIRECTION_P(RTX) \
995 ((SYMBOL_REF_FLAGS (RTX) & MACHO_SYMBOL_FLAG_INDIRECTION) != 0)
996
997 /* Set on a symbol to indicate when fix-and-continue style code
998 generation is being used and the symbol refers to a static symbol
999 that should be rebound from new instances of a translation unit to
1000 the original instance of the data. */
1001
1002 #define MACHO_SYMBOL_FLAG_STATIC ((SYMBOL_FLAG_SUBT_DEP) << 6)
1003 #define MACHO_SYMBOL_STATIC_P(RTX) \
1004 ((SYMBOL_REF_FLAGS (RTX) & MACHO_SYMBOL_FLAG_STATIC) != 0)
1005
1006 /* Symbolic names for various things we might know about a symbol. */
1007
1008 enum machopic_addr_class {
1009 MACHOPIC_UNDEFINED,
1010 MACHOPIC_DEFINED_DATA,
1011 MACHOPIC_UNDEFINED_DATA,
1012 MACHOPIC_DEFINED_FUNCTION,
1013 MACHOPIC_UNDEFINED_FUNCTION
1014 };
1015
1016 /* Macros defining the various PIC cases. */
1017
1018 #undef MACHO_DYNAMIC_NO_PIC_P
1019 #define MACHO_DYNAMIC_NO_PIC_P (TARGET_MACHO_DYNAMIC_NO_PIC)
1020 #undef MACHOPIC_INDIRECT
1021 #define MACHOPIC_INDIRECT (flag_pic || MACHO_DYNAMIC_NO_PIC_P)
1022 #define MACHOPIC_JUST_INDIRECT (MACHO_DYNAMIC_NO_PIC_P)
1023 #undef MACHOPIC_PURE
1024 #define MACHOPIC_PURE (flag_pic && ! MACHO_DYNAMIC_NO_PIC_P)
1025
1026 #undef TARGET_ENCODE_SECTION_INFO
1027 #define TARGET_ENCODE_SECTION_INFO darwin_encode_section_info
1028 #undef TARGET_STRIP_NAME_ENCODING
1029 #define TARGET_STRIP_NAME_ENCODING default_strip_name_encoding
1030
1031 #define GEN_BINDER_NAME_FOR_STUB(BUF,STUB,STUB_LENGTH) \
1032 do { \
1033 const char *const stub_ = (STUB); \
1034 char *buffer_ = (BUF); \
1035 strcpy (buffer_, stub_); \
1036 if (stub_[0] == '"') \
1037 { \
1038 strcpy (buffer_ + (STUB_LENGTH) - 1, "_binder\""); \
1039 } \
1040 else \
1041 { \
1042 strcpy (buffer_ + (STUB_LENGTH), "_binder"); \
1043 } \
1044 } while (0)
1045
1046 #define GEN_SYMBOL_NAME_FOR_SYMBOL(BUF,SYMBOL,SYMBOL_LENGTH) \
1047 do { \
1048 const char *const symbol_ = (SYMBOL); \
1049 char *buffer_ = (BUF); \
1050 if (name_needs_quotes (symbol_) && symbol_[0] != '"') \
1051 { \
1052 sprintf (buffer_, "\"%s\"", symbol_); \
1053 } \
1054 else \
1055 { \
1056 strcpy (buffer_, symbol_); \
1057 } \
1058 } while (0)
1059
1060 /* Given a symbol name string, create the lazy pointer version
1061 of the symbol name. */
1062
1063 #define GEN_LAZY_PTR_NAME_FOR_SYMBOL(BUF,SYMBOL,SYMBOL_LENGTH) \
1064 do { \
1065 const char *symbol_ = (SYMBOL); \
1066 char *buffer_ = (BUF); \
1067 if (symbol_[0] == '"') \
1068 { \
1069 strcpy (buffer_, "\"L"); \
1070 strcpy (buffer_ + 2, symbol_ + 1); \
1071 strcpy (buffer_ + (SYMBOL_LENGTH), "$lazy_ptr\""); \
1072 } \
1073 else if (name_needs_quotes (symbol_)) \
1074 { \
1075 strcpy (buffer_, "\"L"); \
1076 strcpy (buffer_ + 2, symbol_); \
1077 strcpy (buffer_ + (SYMBOL_LENGTH) + 2, "$lazy_ptr\""); \
1078 } \
1079 else \
1080 { \
1081 strcpy (buffer_, "L"); \
1082 strcpy (buffer_ + 1, symbol_); \
1083 strcpy (buffer_ + (SYMBOL_LENGTH) + 1, "$lazy_ptr"); \
1084 } \
1085 } while (0)
1086
1087 #define EH_FRAME_SECTION_NAME "__TEXT"
1088 #define EH_FRAME_SECTION_ATTR ",coalesced,no_toc+strip_static_syms+live_support"
1089
1090 #undef ASM_PREFERRED_EH_DATA_FORMAT
1091 #define ASM_PREFERRED_EH_DATA_FORMAT(CODE,GLOBAL) \
1092 (((CODE) == 2 && (GLOBAL) == 1) || ((CODE) == 0 && (GLOBAL) == 1) \
1093 ? (DW_EH_PE_pcrel | DW_EH_PE_indirect | DW_EH_PE_sdata4) : \
1094 ((CODE) == 1 || (GLOBAL) == 0) ? DW_EH_PE_pcrel : DW_EH_PE_absptr)
1095
1096 #define ASM_OUTPUT_DWARF_DELTA(FILE,SIZE,LABEL1,LABEL2) \
1097 darwin_asm_output_dwarf_delta (FILE, SIZE, LABEL1, LABEL2, 0)
1098
1099 #define ASM_OUTPUT_DWARF_OFFSET(FILE,SIZE,LABEL,OFFSET,BASE) \
1100 darwin_asm_output_dwarf_offset (FILE, SIZE, LABEL, OFFSET, BASE)
1101
1102 #define ASM_MAYBE_OUTPUT_ENCODED_ADDR_RTX(ASM_OUT_FILE, ENCODING, SIZE, ADDR, DONE) \
1103 if (ENCODING == ASM_PREFERRED_EH_DATA_FORMAT (2, 1)) { \
1104 darwin_non_lazy_pcrel (ASM_OUT_FILE, ADDR); \
1105 goto DONE; \
1106 }
1107
1108 /* Experimentally, putting jump tables in text is faster on SPEC.
1109 Also this is needed for correctness for coalesced functions. */
1110
1111 #ifndef JUMP_TABLES_IN_TEXT_SECTION
1112 #define JUMP_TABLES_IN_TEXT_SECTION 1
1113 #endif
1114
1115 #define TARGET_TERMINATE_DW2_EH_FRAME_INFO false
1116
1117 #define TARGET_ASM_INIT_SECTIONS darwin_init_sections
1118 #undef TARGET_ASM_NAMED_SECTION
1119 #define TARGET_ASM_NAMED_SECTION darwin_asm_named_section
1120
1121 #define DARWIN_REGISTER_TARGET_PRAGMAS() \
1122 do { \
1123 if (!flag_preprocess_only) \
1124 cpp_register_pragma (parse_in, NULL, "mark", \
1125 darwin_pragma_ignore, false); \
1126 c_register_pragma (0, "options", darwin_pragma_options); \
1127 c_register_pragma (0, "segment", darwin_pragma_ignore); \
1128 c_register_pragma (0, "unused", darwin_pragma_unused); \
1129 c_register_pragma (0, "ms_struct", darwin_pragma_ms_struct); \
1130 } while (0)
1131
1132 #undef ASM_APP_ON
1133 #define ASM_APP_ON ""
1134 #undef ASM_APP_OFF
1135 #define ASM_APP_OFF ""
1136
1137 void darwin_register_frameworks (const char *, const char *, int);
1138 void darwin_register_objc_includes (const char *, const char *, int);
1139 #define TARGET_EXTRA_PRE_INCLUDES darwin_register_objc_includes
1140 #define TARGET_EXTRA_INCLUDES darwin_register_frameworks
1141
1142 void add_framework_path (char *);
1143 #define TARGET_OPTF add_framework_path
1144
1145 #define TARGET_POSIX_IO
1146
1147 #define WINT_TYPE "int"
1148
1149 /* Every program on darwin links against libSystem which contains the pthread
1150 routines, so there's no need to explicitly call out when doing threaded
1151 work. */
1152
1153 #undef GOMP_SELF_SPECS
1154 #define GOMP_SELF_SPECS ""
1155 #undef GTM_SELF_SPECS
1156 #define GTM_SELF_SPECS ""
1157
1158 /* Darwin disables section anchors by default.
1159 They should be enabled per arch where support exists in that arch. */
1160 #define TARGET_ASM_OUTPUT_ANCHOR NULL
1161 #define DARWIN_SECTION_ANCHORS 0
1162
1163 #define HAVE_ENABLE_EXECUTE_STACK
1164
1165 /* For Apple KEXTs, we make the constructors return this to match gcc
1166 2.95. */
1167 #define TARGET_CXX_CDTOR_RETURNS_THIS (darwin_kextabi_p)
1168 #define TARGET_KEXTABI flag_apple_kext
1169
1170 /* We have target-specific builtins. */
1171 #define SUBTARGET_FOLD_BUILTIN darwin_fold_builtin
1172
1173 #define TARGET_N_FORMAT_TYPES 1
1174 #define TARGET_FORMAT_TYPES darwin_additional_format_types
1175
1176 #ifndef USED_FOR_TARGET
1177 extern void darwin_driver_init (unsigned int *,struct cl_decoded_option **);
1178 #define GCC_DRIVER_HOST_INITIALIZATION \
1179 darwin_driver_init (&decoded_options_count, &decoded_options)
1180 #endif
1181
1182 /* The Apple assembler and linker do not support constructor priorities. */
1183 #undef SUPPORTS_INIT_PRIORITY
1184 #define SUPPORTS_INIT_PRIORITY 0
1185
1186 #undef STACK_CHECK_STATIC_BUILTIN
1187 #define STACK_CHECK_STATIC_BUILTIN 1
1188
1189 /* When building cross-compilers (and native crosses) we shall default to
1190 providing an osx-version-min of this unless overridden by the User.
1191 10.5 is the only version that fully supports all our archs so that's the
1192 fall-back default. */
1193 #ifndef DEF_MIN_OSX_VERSION
1194 #define DEF_MIN_OSX_VERSION "10.5"
1195 #endif
1196
1197 /* Later versions of ld64 support coalescing weak code/data without requiring
1198 that they be placed in specially identified sections. This is the earliest
1199 _tested_ version known to support this so far. */
1200 #define MIN_LD64_NO_COAL_SECTS "236.3"
1201
1202 /* From at least version 62.1, ld64 can build symbol indirection stubs as
1203 needed, and there is no need for the compiler to emit them. */
1204 #define MIN_LD64_OMIT_STUBS "62.1"
1205
1206 /* Emit start labels for init and term sections from this version. */
1207 #define MIN_LD64_INIT_TERM_START_LABELS "136.0"
1208
1209 /* If we have no definition for the linker version, pick the minimum version
1210 that will bootstrap the compiler. */
1211 #ifndef LD64_VERSION
1212 # ifndef DEF_LD64
1213 # define LD64_VERSION "85.2.1"
1214 # else
1215 # define LD64_VERSION DEF_LD64
1216 # endif
1217 #endif
1218
1219 /* CTF and BTF support. */
1220 #undef CTF_INFO_SECTION_NAME
1221 #define CTF_INFO_SECTION_NAME "__CTF_BTF,__ctf,regular,debug"
1222 #undef BTF_INFO_SECTION_NAME
1223 #define BTF_INFO_SECTION_NAME "__CTF_BTF,__btf,regular,debug"
1224
1225 #endif /* CONFIG_DARWIN_H */
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