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1 | ; Options for the language- and target-independent parts of the compiler. | |
2 | ||
3 | ; Copyright (C) 2003-2021 Free Software Foundation, Inc. | |
4 | ; | |
5 | ; This file is part of GCC. | |
6 | ; | |
7 | ; GCC is free software; you can redistribute it and/or modify it under | |
8 | ; the terms of the GNU General Public License as published by the Free | |
9 | ; Software Foundation; either version 3, or (at your option) any later | |
10 | ; version. | |
11 | ; | |
12 | ; GCC is distributed in the hope that it will be useful, but WITHOUT ANY | |
13 | ; WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
14 | ; FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
15 | ; for more details. | |
16 | ; | |
17 | ; You should have received a copy of the GNU General Public License | |
18 | ; along with GCC; see the file COPYING3. If not see | |
19 | ; <http://www.gnu.org/licenses/>. | |
20 | ||
21 | ; See the GCC internals manual (options.texi) for a description of this file's format. | |
22 | ||
23 | ; Please try to keep this file in ASCII collating order. | |
24 | ||
25 | Variable | |
26 | int target_flags | |
27 | ||
28 | Variable | |
29 | int optimize | |
30 | ||
31 | Variable | |
32 | int optimize_size | |
33 | ||
34 | Variable | |
35 | int optimize_debug | |
36 | ||
37 | ; Not used directly to control optimizations, only to save -Ofast | |
38 | ; setting for "optimize" attributes. | |
39 | Variable | |
40 | int optimize_fast | |
41 | ||
42 | ; True if this is the lto front end. This is used to disable gimple | |
43 | ; generation and lowering passes that are normally run on the output | |
44 | ; of a front end. These passes must be bypassed for lto since they | |
45 | ; have already been done before the gimple was written. | |
46 | Variable | |
47 | bool in_lto_p = false | |
48 | ||
49 | ; This variable is set to non-0 only by LTO front-end. 1 indicates that | |
50 | ; the output produced will be used for incremental linking (thus weak symbols | |
51 | ; can still be bound) and 2 indicates that the IL is going to be linked and | |
52 | ; and output to LTO object file. | |
53 | Variable | |
54 | enum incremental_link flag_incremental_link = INCREMENTAL_LINK_NONE | |
55 | ||
56 | ; 0 means straightforward implementation of complex divide acceptable. | |
57 | ; 1 means wide ranges of inputs must work for complex divide. | |
58 | ; 2 means C99-like requirements for complex multiply and divide. | |
59 | Variable | |
60 | int flag_complex_method = 1 | |
61 | ||
62 | ; Language specific warning pass for unused results. | |
63 | Variable | |
64 | bool flag_warn_unused_result = false | |
65 | ||
66 | ; Nonzero if we should write GIMPLE bytecode for link-time optimization. | |
67 | Variable | |
68 | int flag_generate_lto | |
69 | ||
70 | ; Nonzero if we should write GIMPLE bytecode for offload compilation. | |
71 | Variable | |
72 | int flag_generate_offload = 0 | |
73 | ||
74 | ; Nonzero means we should be saving declaration info into a .X file. | |
75 | Variable | |
76 | int flag_gen_aux_info = 0 | |
77 | ||
78 | ; Nonzero if we are compiling code for a shared library, zero for | |
79 | ; executable. | |
80 | Variable | |
81 | int flag_shlib | |
82 | ||
83 | ; These two are really VEC(char_p,heap) *. | |
84 | ||
85 | Variable | |
86 | void *flag_instrument_functions_exclude_functions | |
87 | ||
88 | Variable | |
89 | void *flag_instrument_functions_exclude_files | |
90 | ||
91 | ; Generic structs (e.g. templates not explicitly specialized) | |
92 | ; may not have a compilation unit associated with them, and so | |
93 | ; may need to be treated differently from ordinary structs. | |
94 | ; | |
95 | ; Structs only handled by reference (indirectly), will also usually | |
96 | ; not need as much debugging information. | |
97 | ||
98 | Variable | |
99 | enum debug_struct_file debug_struct_ordinary[DINFO_USAGE_NUM_ENUMS] = { DINFO_STRUCT_FILE_ANY, DINFO_STRUCT_FILE_ANY, DINFO_STRUCT_FILE_ANY } | |
100 | ||
101 | Variable | |
102 | enum debug_struct_file debug_struct_generic[DINFO_USAGE_NUM_ENUMS] = { DINFO_STRUCT_FILE_ANY, DINFO_STRUCT_FILE_ANY, DINFO_STRUCT_FILE_ANY } | |
103 | ||
104 | ; True if we should exit after parsing options. | |
105 | Variable | |
106 | bool exit_after_options | |
107 | ||
108 | ; Type(s) of debugging information we are producing (if any). See | |
109 | ; flag-types.h for the definitions of the different possible types of | |
110 | ; debugging information. | |
111 | Variable | |
112 | uint32_t write_symbols = NO_DEBUG | |
113 | ||
114 | ; Level of debugging information we are producing. See flag-types.h | |
115 | ; for the definitions of the different possible levels. | |
116 | Variable | |
117 | enum debug_info_levels debug_info_level = DINFO_LEVEL_NONE | |
118 | ||
119 | ; Nonzero means use GNU-only extensions in the generated symbolic | |
120 | ; debugging information. Currently, this only has an effect when | |
121 | ; write_symbols is set to DBX_DEBUG or XCOFF_DEBUG. | |
122 | Variable | |
123 | bool use_gnu_debug_info_extensions | |
124 | ||
125 | ; Level of CTF debugging information we are producing. See flag-types.h | |
126 | ; for the definitions of the different possible levels. | |
127 | Variable | |
128 | enum ctf_debug_info_levels ctf_debug_info_level = CTFINFO_LEVEL_NONE | |
129 | ||
130 | ; Original value of maximum field alignment in bytes, specified via | |
131 | ; -fpack-struct=<value>. | |
132 | Variable | |
133 | unsigned int initial_max_fld_align = TARGET_DEFAULT_PACK_STRUCT | |
134 | ||
135 | ; Type of stack check. | |
136 | Variable | |
137 | enum stack_check_type flag_stack_check = NO_STACK_CHECK | |
138 | ||
139 | ; True if stack usage information needs to be computed. | |
140 | Variable | |
141 | bool flag_stack_usage_info = false | |
142 | ||
143 | ; -dA causes debug commentary information to be produced in | |
144 | ; the generated assembly code (to make it more readable). This option | |
145 | ; is generally only of use to those who actually need to read the | |
146 | ; generated assembly code (perhaps while debugging the compiler itself). | |
147 | ; Currently, this switch is only used by dwarf2out.c; however, it is intended | |
148 | ; to be a catchall for printing debug information in the assembler file. | |
149 | Variable | |
150 | int flag_debug_asm | |
151 | ||
152 | ; Balance between GNAT encodings and standard DWARF to emit. | |
153 | Variable | |
154 | enum dwarf_gnat_encodings gnat_encodings = DWARF_GNAT_ENCODINGS_DEFAULT | |
155 | ||
156 | ; -dP causes the rtl to be emitted as a comment in assembly. | |
157 | Variable | |
158 | int flag_dump_rtl_in_asm | |
159 | ||
160 | ; Whether -da was passed (used only in handle_common_deferred_options). | |
161 | Variable | |
162 | bool flag_dump_all_passed | |
163 | ||
164 | ; Other flags saying which kinds of debugging dump have been requested. | |
165 | ||
166 | Variable | |
167 | int rtl_dump_and_exit | |
168 | ||
169 | Variable | |
170 | int flag_print_asm_name | |
171 | ||
172 | ; Name of top-level original source file (what was input to cpp). | |
173 | ; This comes from the #-command at the beginning of the actual input. | |
174 | ; If there isn't any there, then this is the cc1 input file name. | |
175 | Variable | |
176 | const char *main_input_filename | |
177 | ||
178 | ; Pointer to base name in main_input_filename, with directories and a | |
179 | ; single final extension removed, and the length of this base | |
180 | ; name. | |
181 | ||
182 | Variable | |
183 | const char *main_input_basename | |
184 | ||
185 | Variable | |
186 | int main_input_baselength | |
187 | ||
188 | ; The base name used for auxiliary output files. | |
189 | ; dump_base_name minus dump_base_ext. | |
190 | ||
191 | Variable | |
192 | const char *aux_base_name | |
193 | ||
194 | ; Which options have been printed by --help. | |
195 | Variable | |
196 | char *help_printed | |
197 | ||
198 | ; Which enums have been printed by --help. 0 = not printed, no | |
199 | ; relevant options seen, 1 = relevant option seen, not yet printed, 2 | |
200 | ; = printed. | |
201 | Variable | |
202 | char *help_enum_printed | |
203 | ||
204 | ; The number of columns for --help output. | |
205 | Variable | |
206 | unsigned int help_columns | |
207 | ||
208 | ; Whether this options structure has been through finish_options | |
209 | Variable | |
210 | bool flag_opts_finished | |
211 | ||
212 | ; What the sanitizer should instrument | |
213 | Variable | |
214 | unsigned int flag_sanitize | |
215 | ||
216 | ; What sanitizers should recover from errors | |
217 | Variable | |
218 | unsigned int flag_sanitize_recover = (SANITIZE_UNDEFINED | SANITIZE_UNDEFINED_NONDEFAULT | SANITIZE_KERNEL_ADDRESS | SANITIZE_KERNEL_HWADDRESS) & ~(SANITIZE_UNREACHABLE | SANITIZE_RETURN) | |
219 | ||
220 | ; What the coverage sanitizers should instrument | |
221 | Variable | |
222 | unsigned int flag_sanitize_coverage | |
223 | ||
224 | ; Flag whether a prefix has been added to dump_base_name | |
225 | Variable | |
226 | bool dump_base_name_prefixed = false | |
227 | ||
228 | ; What subset of registers should be zeroed on function return | |
229 | Variable | |
230 | unsigned int flag_zero_call_used_regs | |
231 | ||
232 | ### | |
233 | Driver | |
234 | ||
235 | -assemble | |
236 | Driver Alias(S) | |
237 | ||
238 | -compile | |
239 | Driver Alias(c) | |
240 | ||
241 | -completion= | |
242 | Common Driver Joined Undocumented | |
243 | Provide bash completion for options starting with provided string. | |
244 | ||
245 | -coverage | |
246 | Driver Alias(coverage) | |
247 | ||
248 | -debug | |
249 | Common Alias(g) | |
250 | ||
251 | -dump | |
252 | Common Separate Alias(d) | |
253 | ||
254 | -dump= | |
255 | Common Joined Alias(d) | |
256 | ||
257 | -dumpbase | |
258 | Driver Common Separate Alias(dumpbase) | |
259 | ||
260 | -dumpbase-ext | |
261 | Driver Common Separate Alias(dumpbase-ext) | |
262 | ||
263 | -dumpdir | |
264 | Driver Common Separate Alias(dumpdir) | |
265 | ||
266 | -entry | |
267 | Driver Separate Alias(e) | |
268 | ||
269 | -entry= | |
270 | Driver Joined Alias(e) | |
271 | ||
272 | -extra-warnings | |
273 | Common Warning Alias(Wextra) | |
274 | ||
275 | -for-assembler | |
276 | Driver Separate Alias(Xassembler) | |
277 | ||
278 | -for-assembler= | |
279 | Driver JoinedOrMissing Alias(Xassembler) | |
280 | ||
281 | -for-linker | |
282 | Driver Separate Alias(Xlinker) | |
283 | ||
284 | -for-linker= | |
285 | Driver JoinedOrMissing Alias(Xlinker) | |
286 | ||
287 | -force-link | |
288 | Driver Separate Alias(u) | |
289 | ||
290 | -force-link= | |
291 | Driver Joined Alias(u) | |
292 | ||
293 | -help | |
294 | Common Driver Var(help_flag) | |
295 | Display this information. | |
296 | ||
297 | -help= | |
298 | Common Driver Joined | |
299 | --help=<class> Display descriptions of a specific class of options. <class> is one or more of optimizers, target, warnings, undocumented, params. | |
300 | ||
301 | -language | |
302 | Driver Separate Alias(x) | |
303 | ||
304 | -language= | |
305 | Driver Joined Alias(x) | |
306 | ||
307 | -library-directory | |
308 | Driver Separate Alias(L) | |
309 | ||
310 | -library-directory= | |
311 | Driver Joined Alias(L) | |
312 | ||
313 | -no-canonical-prefixes | |
314 | Driver Alias(no-canonical-prefixes) | |
315 | ||
316 | -no-standard-libraries | |
317 | Driver Alias(nostdlib) | |
318 | ||
319 | -no-sysroot-suffix | |
320 | Driver Var(no_sysroot_suffix) | |
321 | ||
322 | -no-warnings | |
323 | Common Alias(w) | |
324 | ||
325 | -optimize | |
326 | Common Alias(O) | |
327 | ||
328 | -output | |
329 | Common Driver Separate Alias(o) MissingArgError(missing filename after %qs) | |
330 | ||
331 | -output= | |
332 | Common Driver Joined Alias(o) MissingArgError(missing filename after %qs) | |
333 | ||
334 | -pass-exit-codes | |
335 | Driver Alias(pass-exit-codes) | |
336 | ||
337 | -pedantic | |
338 | Common Alias(Wpedantic) | |
339 | ||
340 | -pedantic-errors | |
341 | Common Alias(pedantic-errors) | |
342 | ||
343 | -pie | |
344 | Driver Alias(pie) | |
345 | ||
346 | -static-pie | |
347 | Driver Alias(static-pie) | |
348 | ||
349 | -pipe | |
350 | Driver Alias(pipe) | |
351 | ||
352 | -prefix | |
353 | Driver Separate Alias(B) | |
354 | ||
355 | -prefix= | |
356 | Driver JoinedOrMissing Alias(B) | |
357 | ||
358 | -preprocess | |
359 | Driver Alias(E) | |
360 | ||
361 | -print-file-name | |
362 | Driver Separate Alias(print-file-name=) | |
363 | ||
364 | -print-file-name= | |
365 | Driver JoinedOrMissing Alias(print-file-name=) | |
366 | ||
367 | -print-libgcc-file-name | |
368 | Driver Alias(print-libgcc-file-name) | |
369 | ||
370 | -print-multi-directory | |
371 | Driver Alias(print-multi-directory) | |
372 | ||
373 | -print-multi-lib | |
374 | Driver Alias(print-multi-lib) | |
375 | ||
376 | -print-multi-os-directory | |
377 | Driver Alias(print-multi-os-directory) | |
378 | ||
379 | -print-multiarch | |
380 | Driver Alias(print-multiarch) | |
381 | ||
382 | -print-prog-name | |
383 | Driver Separate Alias(print-prog-name=) | |
384 | ||
385 | -print-prog-name= | |
386 | Driver JoinedOrMissing Alias(print-prog-name=) | |
387 | ||
388 | -print-search-dirs | |
389 | Driver Alias(print-search-dirs) | |
390 | ||
391 | -print-sysroot | |
392 | Driver Alias(print-sysroot) | |
393 | ||
394 | -print-sysroot-headers-suffix | |
395 | Driver Alias(print-sysroot-headers-suffix) | |
396 | ||
397 | -profile | |
398 | Common Alias(p) | |
399 | ||
400 | -save-temps | |
401 | Driver Alias(save-temps) | |
402 | ||
403 | -shared | |
404 | Driver Alias(shared) | |
405 | ||
406 | -specs | |
407 | Driver Separate Alias(specs=) | |
408 | ||
409 | -specs= | |
410 | Driver Joined Alias(specs=) | |
411 | ||
412 | -static | |
413 | Driver Alias(static) | |
414 | ||
415 | -symbolic | |
416 | Driver Alias(symbolic) | |
417 | ||
418 | -target-help | |
419 | Common Driver | |
420 | Alias for --help=target. | |
421 | ||
422 | -time | |
423 | Driver Alias(time) | |
424 | ||
425 | -verbose | |
426 | Driver Alias(v) | |
427 | ||
428 | ;; The driver used to convert options such as --help into forms such | |
429 | ;; as -fhelp; the following four entries are for compatibility with | |
430 | ;; any direct uses of those (undocumented) -f forms | |
431 | fhelp | |
432 | Common Driver Alias(-help) | |
433 | ||
434 | fhelp= | |
435 | Common Driver Joined Alias(-help=) | |
436 | ||
437 | ftarget-help | |
438 | Common Driver Alias(-target-help) | |
439 | ||
440 | fversion | |
441 | Common Driver Alias(-version) | |
442 | ||
443 | -sysroot | |
444 | Driver Separate Alias(-sysroot=) | |
445 | ||
446 | -sysroot= | |
447 | Driver JoinedOrMissing | |
448 | ||
449 | -version | |
450 | Common Driver | |
451 | ||
452 | B | |
453 | Driver Joined Separate | |
454 | ||
455 | E | |
456 | Driver | |
457 | ||
458 | L | |
459 | Driver Joined Separate | |
460 | ||
461 | N | |
462 | Driver | |
463 | ||
464 | O | |
465 | Common JoinedOrMissing Optimization | |
466 | -O<number> Set optimization level to <number>. | |
467 | ||
468 | Os | |
469 | Common Optimization | |
470 | Optimize for space rather than speed. | |
471 | ||
472 | Ofast | |
473 | Common Optimization | |
474 | Optimize for speed disregarding exact standards compliance. | |
475 | ||
476 | Og | |
477 | Common Optimization | |
478 | Optimize for debugging experience rather than speed or size. | |
479 | ||
480 | Q | |
481 | Driver | |
482 | ||
483 | Qn | |
484 | Driver Negative(Qy) | |
485 | ||
486 | Qy | |
487 | Driver Negative(Qn) | |
488 | ||
489 | R | |
490 | Driver Joined Separate | |
491 | ||
492 | S | |
493 | Driver | |
494 | ||
495 | T | |
496 | Driver Joined Separate | |
497 | ||
498 | Tbss | |
499 | Driver Separate | |
500 | ||
501 | Tbss= | |
502 | Driver Joined | |
503 | ||
504 | Tdata | |
505 | Driver Separate | |
506 | ||
507 | Tdata= | |
508 | Driver Joined | |
509 | ||
510 | Ttext | |
511 | Driver Separate | |
512 | ||
513 | Ttext= | |
514 | Driver Joined | |
515 | ||
516 | W | |
517 | Common RejectNegative Warning Alias(Wextra) | |
518 | This switch is deprecated; use -Wextra instead. | |
519 | ||
520 | Wa, | |
521 | Driver JoinedOrMissing RejectNegative | |
522 | ||
523 | Wl, | |
524 | Driver JoinedOrMissing RejectNegative | |
525 | ||
526 | Wp, | |
527 | Driver JoinedOrMissing RejectNegative | |
528 | ||
529 | Waggregate-return | |
530 | Common Var(warn_aggregate_return) Warning | |
531 | Warn about returning structures, unions or arrays. | |
532 | ||
533 | Waggressive-loop-optimizations | |
534 | Common Var(warn_aggressive_loop_optimizations) Init(1) Warning | |
535 | Warn if a loop with constant number of iterations triggers undefined behavior. | |
536 | ||
537 | Warray-bounds | |
538 | Common Var(warn_array_bounds) Warning | |
539 | Warn if an array is accessed out of bounds. | |
540 | ||
541 | Warray-bounds= | |
542 | Common Joined RejectNegative UInteger Var(warn_array_bounds) Warning IntegerRange(0, 2) | |
543 | Warn if an array is accessed out of bounds. | |
544 | ||
545 | Wattributes | |
546 | Common Var(warn_attributes) Init(1) Warning | |
547 | Warn about inappropriate attribute usage. | |
548 | ||
549 | Wattribute-alias | |
550 | Common Alias(Wattribute_alias=, 1, 0) Warning | |
551 | Warn about type safety and similar errors and mismatches in declarations with alias attributes. | |
552 | ||
553 | Wattribute-alias= | |
554 | Common Joined RejectNegative UInteger Var(warn_attribute_alias) Init(1) Warning IntegerRange(0, 2) | |
555 | Warn about type safety and similar errors and mismatches in declarations with alias attributes. | |
556 | ||
557 | Wcannot-profile | |
558 | Common Var(warn_cannot_profile) Init(1) Warning | |
559 | Warn when profiling instrumentation was requested, but could not be applied to | |
560 | a certain function. | |
561 | ||
562 | Wcast-align | |
563 | Common Var(warn_cast_align) Warning | |
564 | Warn about pointer casts which increase alignment. | |
565 | ||
566 | Wcast-align=strict | |
567 | Common Var(warn_cast_align,2) Warning | |
568 | Warn about pointer casts which increase alignment. | |
569 | ||
570 | Wcpp | |
571 | Common Var(warn_cpp) Init(1) Warning | |
572 | Warn when a #warning directive is encountered. | |
573 | ||
574 | Wattribute-warning | |
575 | Common Var(warn_attribute_warning) Init(1) Warning | |
576 | Warn about uses of __attribute__((warning)) declarations. | |
577 | ||
578 | Wdeprecated | |
579 | Common Var(warn_deprecated) Init(1) Warning | |
580 | Warn if a deprecated compiler feature, class, method, or field is used. | |
581 | ||
582 | Wdeprecated-declarations | |
583 | Common Var(warn_deprecated_decl) Init(1) Warning | |
584 | Warn about uses of __attribute__((deprecated)) declarations. | |
585 | ||
586 | Wdisabled-optimization | |
587 | Common Var(warn_disabled_optimization) Warning | |
588 | Warn when an optimization pass is disabled. | |
589 | ||
590 | Werror | |
591 | Common Var(warnings_are_errors) | |
592 | Treat all warnings as errors. | |
593 | ||
594 | Werror= | |
595 | Common Joined | |
596 | Treat specified warning as error. | |
597 | ||
598 | Wextra | |
599 | Common Var(extra_warnings) Warning | |
600 | Print extra (possibly unwanted) warnings. | |
601 | ||
602 | Wfatal-errors | |
603 | Common Var(flag_fatal_errors) | |
604 | Exit on the first error occurred. | |
605 | ||
606 | Wframe-larger-than= | |
607 | Common RejectNegative Joined Host_Wide_Int ByteSize Warning Var(warn_frame_larger_than_size) Init(HOST_WIDE_INT_MAX) | |
608 | -Wframe-larger-than=<byte-size> Warn if a function's stack frame requires in excess of <byte-size>. | |
609 | ||
610 | Wno-frame-larger-than | |
611 | Common Alias(Wframe-larger-than=,18446744073709551615EiB,none) Warning | |
612 | Disable -Wframe-larger-than= warning. Equivalent to -Wframe-larger-than=<SIZE_MAX> or larger. | |
613 | ||
614 | Wfree-nonheap-object | |
615 | Common Var(warn_free_nonheap_object) Init(1) Warning | |
616 | Warn when attempting to free a non-heap object. | |
617 | ||
618 | Whsa | |
619 | Common Ignore Warning | |
620 | Does nothing. Preserved for backward compatibility. | |
621 | ||
622 | Wimplicit-fallthrough | |
623 | Common Alias(Wimplicit-fallthrough=,3,0) Warning | |
624 | ||
625 | Wimplicit-fallthrough= | |
626 | Common Var(warn_implicit_fallthrough) RejectNegative Joined UInteger Warning IntegerRange(0, 5) | |
627 | Warn when a switch case falls through. | |
628 | ||
629 | Winline | |
630 | Common Var(warn_inline) Warning Optimization | |
631 | Warn when an inlined function cannot be inlined. | |
632 | ||
633 | Winvalid-memory-model | |
634 | Common Var(warn_invalid_memory_model) Init(1) Warning | |
635 | Warn when an atomic memory model parameter is known to be outside the valid range. | |
636 | ||
637 | Wlarger-than- | |
638 | Common RejectNegative Joined Warning Undocumented Alias(Wlarger-than=) | |
639 | ||
640 | Wlarger-than= | |
641 | Common RejectNegative Joined Host_Wide_Int ByteSize Warning Var(warn_larger_than_size) Init(HOST_WIDE_INT_MAX) | |
642 | -Wlarger-than=<byte-size> Warn if an object's size exceeds <byte-size>. | |
643 | ||
644 | Wno-larger-than | |
645 | Common Alias(Wlarger-than=,18446744073709551615EiB,none) Warning | |
646 | Disable -Wlarger-than= warning. Equivalent to -Wlarger-than=<SIZE_MAX> or larger. | |
647 | ||
648 | Wnonnull-compare | |
649 | Var(warn_nonnull_compare) Warning | |
650 | Warn if comparing pointer parameter with nonnull attribute with NULL. | |
651 | ||
652 | Wnull-dereference | |
653 | Common Var(warn_null_dereference) Warning | |
654 | Warn if dereferencing a NULL pointer may lead to erroneous or undefined behavior. | |
655 | ||
656 | Wunsafe-loop-optimizations | |
657 | Common Ignore Warning | |
658 | Does nothing. Preserved for backward compatibility. | |
659 | ||
660 | Wmissing-noreturn | |
661 | Common Warning Alias(Wsuggest-attribute=noreturn) | |
662 | ||
663 | Wodr | |
664 | Common Var(warn_odr_violations) Init(1) Warning | |
665 | Warn about some C++ One Definition Rule violations during link time optimization. | |
666 | ||
667 | Woverflow | |
668 | Common Var(warn_overflow) Init(1) Warning | |
669 | Warn about overflow in arithmetic expressions. | |
670 | ||
671 | Wlto-type-mismatch | |
672 | Common Var(warn_lto_type_mismatch) Init(1) Warning | |
673 | During link time optimization warn about mismatched types of global declarations. | |
674 | ||
675 | Wpacked | |
676 | Common Var(warn_packed) Warning | |
677 | Warn when the packed attribute has no effect on struct layout. | |
678 | ||
679 | Wpadded | |
680 | Common Var(warn_padded) Warning | |
681 | Warn when padding is required to align structure members. | |
682 | ||
683 | Wpedantic | |
684 | Common Var(pedantic) Init(0) Warning | |
685 | Issue warnings needed for strict compliance to the standard. | |
686 | ||
687 | Wreturn-local-addr | |
688 | Common Var(warn_return_local_addr) Init(1) Warning | |
689 | Warn about returning a pointer/reference to a local or temporary variable. | |
690 | ||
691 | Wshadow | |
692 | Common Var(warn_shadow) Warning | |
693 | Warn when one variable shadows another. Same as -Wshadow=global. | |
694 | ||
695 | Wshadow=global | |
696 | Common Warning Alias(Wshadow) | |
697 | Warn when one variable shadows another (globally). | |
698 | ||
699 | Wshadow=local | |
700 | Common Var(warn_shadow_local) Warning EnabledBy(Wshadow) | |
701 | Warn when one local variable shadows another local variable or parameter. | |
702 | ||
703 | Wshadow-local | |
704 | Common Warning Undocumented Alias(Wshadow=local) | |
705 | ||
706 | Wshadow=compatible-local | |
707 | Common Var(warn_shadow_compatible_local) Warning EnabledBy(Wshadow=local) | |
708 | Warn when one local variable shadows another local variable or parameter of compatible type. | |
709 | ||
710 | Wshadow-compatible-local | |
711 | Common Warning Undocumented Alias(Wshadow=compatible-local) | |
712 | ||
713 | Wstack-protector | |
714 | Common Var(warn_stack_protect) Warning | |
715 | Warn when not issuing stack smashing protection for some reason. | |
716 | ||
717 | Wstack-usage= | |
718 | Common Joined RejectNegative Host_Wide_Int ByteSize Var(warn_stack_usage) Warning Init(HOST_WIDE_INT_MAX) | |
719 | -Wstack-usage=<byte-size> Warn if stack usage might exceed <byte-size>. | |
720 | ||
721 | Wno-stack-usage | |
722 | Common Alias(Wstack-usage=,18446744073709551615EiB,none) Warning | |
723 | Disable Wstack-usage= warning. Equivalent to Wstack-usage=<SIZE_MAX> or larger. | |
724 | ||
725 | Wstrict-aliasing | |
726 | Common Warning | |
727 | Warn about code which might break strict aliasing rules. | |
728 | ||
729 | Wstrict-aliasing= | |
730 | Common Joined RejectNegative UInteger Var(warn_strict_aliasing) Warning | |
731 | Warn about code which might break strict aliasing rules. | |
732 | ||
733 | Wstrict-overflow | |
734 | Common Warning | |
735 | Warn about optimizations that assume that signed overflow is undefined. | |
736 | ||
737 | Wstrict-overflow= | |
738 | Common Joined RejectNegative UInteger Var(warn_strict_overflow) Warning | |
739 | Warn about optimizations that assume that signed overflow is undefined. | |
740 | ||
741 | Wsuggest-attribute=cold | |
742 | Common Var(warn_suggest_attribute_cold) Warning | |
743 | Warn about functions which might be candidates for __attribute__((cold)). | |
744 | ||
745 | Wsuggest-attribute=const | |
746 | Common Var(warn_suggest_attribute_const) Warning | |
747 | Warn about functions which might be candidates for __attribute__((const)). | |
748 | ||
749 | Wsuggest-attribute=pure | |
750 | Common Var(warn_suggest_attribute_pure) Warning | |
751 | Warn about functions which might be candidates for __attribute__((pure)). | |
752 | ||
753 | Wsuggest-attribute=noreturn | |
754 | Common Var(warn_suggest_attribute_noreturn) Warning | |
755 | Warn about functions which might be candidates for __attribute__((noreturn)). | |
756 | ||
757 | Wsuggest-attribute=malloc | |
758 | Common Var(warn_suggest_attribute_malloc) Warning | |
759 | Warn about functions which might be candidates for __attribute__((malloc)). | |
760 | ||
761 | Wsuggest-final-types | |
762 | Common Var(warn_suggest_final_types) Warning | |
763 | Warn about C++ polymorphic types where adding final keyword would improve code quality. | |
764 | ||
765 | Wsuggest-final-methods | |
766 | Common Var(warn_suggest_final_methods) Warning | |
767 | Warn about C++ virtual methods where adding final keyword would improve code quality. | |
768 | ||
769 | Wswitch-unreachable | |
770 | Common Var(warn_switch_unreachable) Warning Init(1) | |
771 | Warn about statements between switch's controlling expression and the first | |
772 | case. | |
773 | ||
774 | Wsystem-headers | |
775 | Common Var(warn_system_headers) Warning | |
776 | Do not suppress warnings from system headers. | |
777 | ||
778 | Wtrampolines | |
779 | Common Var(warn_trampolines) Warning | |
780 | Warn whenever a trampoline is generated. | |
781 | ||
782 | Wtype-limits | |
783 | Common Var(warn_type_limits) Warning EnabledBy(Wextra) | |
784 | Warn if a comparison is always true or always false due to the limited range of the data type. | |
785 | ||
786 | Wuninitialized | |
787 | Common Var(warn_uninitialized) Warning EnabledBy(Wextra) | |
788 | Warn about uninitialized automatic variables. | |
789 | ||
790 | Wmaybe-uninitialized | |
791 | Common Var(warn_maybe_uninitialized) Warning EnabledBy(Wuninitialized) | |
792 | Warn about maybe uninitialized automatic variables. | |
793 | ||
794 | Wunreachable-code | |
795 | Common Ignore Warning | |
796 | Does nothing. Preserved for backward compatibility. | |
797 | ||
798 | Wunused | |
799 | Common Var(warn_unused) Init(0) Warning | |
800 | Enable all -Wunused- warnings. | |
801 | ||
802 | Wunused-but-set-parameter | |
803 | Common Var(warn_unused_but_set_parameter) Warning EnabledBy(Wunused && Wextra) | |
804 | Warn when a function parameter is only set, otherwise unused. | |
805 | ||
806 | Wunused-but-set-variable | |
807 | Common Var(warn_unused_but_set_variable) Warning EnabledBy(Wunused) | |
808 | Warn when a variable is only set, otherwise unused. | |
809 | ||
810 | Wunused-function | |
811 | Common Var(warn_unused_function) Warning EnabledBy(Wunused) | |
812 | Warn when a function is unused. | |
813 | ||
814 | Wunused-label | |
815 | Common Var(warn_unused_label) Warning EnabledBy(Wunused) | |
816 | Warn when a label is unused. | |
817 | ||
818 | Wunused-parameter | |
819 | Common Var(warn_unused_parameter) Warning EnabledBy(Wunused && Wextra) | |
820 | Warn when a function parameter is unused. | |
821 | ||
822 | Wunused-value | |
823 | Common Var(warn_unused_value) Warning EnabledBy(Wunused) | |
824 | Warn when an expression value is unused. | |
825 | ||
826 | Wunused-variable | |
827 | Common Var(warn_unused_variable) Warning EnabledBy(Wunused) | |
828 | Warn when a variable is unused. | |
829 | ||
830 | Wcoverage-mismatch | |
831 | Common Var(warn_coverage_mismatch) Init(1) Warning | |
832 | Warn in case profiles in -fprofile-use do not match. | |
833 | ||
834 | Wcoverage-invalid-line-number | |
835 | Common Var(warn_coverage_invalid_linenum) Init(1) Warning | |
836 | Warn in case a function ends earlier than it begins due to an invalid linenum macros. | |
837 | ||
838 | Wmissing-profile | |
839 | Common Var(warn_missing_profile) Init(1) Warning | |
840 | Warn in case profiles in -fprofile-use do not exist. | |
841 | ||
842 | Wvector-operation-performance | |
843 | Common Var(warn_vector_operation_performance) Warning | |
844 | Warn when a vector operation is compiled outside the SIMD. | |
845 | ||
846 | Wtsan | |
847 | Common Var(warn_tsan) Init(1) Warning | |
848 | Warn about unsupported features in ThreadSanitizer. | |
849 | ||
850 | Xassembler | |
851 | Driver Separate | |
852 | ||
853 | Xlinker | |
854 | Driver Separate | |
855 | ||
856 | Xpreprocessor | |
857 | Driver Separate | |
858 | ||
859 | Z | |
860 | Driver | |
861 | ||
862 | aux-info | |
863 | Common Separate Var(aux_info_file_name) | |
864 | -aux-info <file> Emit declaration information into <file>. | |
865 | ||
866 | aux-info= | |
867 | Common Joined Alias(aux-info) | |
868 | ||
869 | coverage | |
870 | Driver | |
871 | ||
872 | c | |
873 | Driver | |
874 | ||
875 | d | |
876 | Common Joined | |
877 | -d<letters> Enable dumps from specific passes of the compiler. | |
878 | ||
879 | dumpbase | |
880 | Driver Common Separate Var(dump_base_name) | |
881 | -dumpbase <file> Set the file basename to be used for dumps. | |
882 | ||
883 | dumpbase-ext | |
884 | Driver Common Separate Var(dump_base_ext) | |
885 | -dumpbase-ext .<ext> Drop a trailing .<ext> from the dump basename to name auxiliary output files. | |
886 | ||
887 | dumpdir | |
888 | Driver Common Separate Var(dump_dir_name) | |
889 | -dumpdir <dir> Set the directory name to be used for dumps. | |
890 | ||
891 | dumpmachine | |
892 | Driver | |
893 | ||
894 | dumpspecs | |
895 | Driver | |
896 | ||
897 | dumpversion | |
898 | Driver | |
899 | ||
900 | dumpfullversion | |
901 | Driver | |
902 | ||
903 | e | |
904 | Driver Joined Separate | |
905 | ||
906 | ; This option has historically been passed down to the linker by an | |
907 | ; accident of a %{e*} spec, so ensure it continues to be passed down | |
908 | ; as a single option. The supported option for this purpose is | |
909 | ; -rdynamic. See PR 47390. | |
910 | export-dynamic | |
911 | Driver Undocumented | |
912 | ||
913 | ; The version of the C++ ABI in use. The following values are allowed: | |
914 | ; | |
915 | ; 0: The version of the ABI believed most conformant with the C++ ABI | |
916 | ; specification. This ABI may change as bugs are discovered and fixed. | |
917 | ; Therefore, 0 will not necessarily indicate the same ABI in different | |
918 | ; versions of G++. | |
919 | ; | |
920 | ; 1: The version of the ABI first used in G++ 3.2. No longer selectable. | |
921 | ; | |
922 | ; 2: The version of the ABI first used in G++ 3.4, and the default | |
923 | ; until GCC 4.9. | |
924 | ; | |
925 | ; 3: The version of the ABI that fixes the missing underscore | |
926 | ; in template non-type arguments of pointer type. | |
927 | ; | |
928 | ; 4: The version of the ABI that introduces unambiguous mangling of | |
929 | ; vector types. First selectable in G++ 4.5. | |
930 | ; | |
931 | ; 5: The version of the ABI that ignores attribute const/noreturn | |
932 | ; in function pointer mangling, and corrects mangling of decltype and | |
933 | ; function parameters used in other parameters and the return type. | |
934 | ; First selectable in G++ 4.6. | |
935 | ; | |
936 | ; 6: The version of the ABI that doesn't promote scoped enums to int and | |
937 | ; changes the mangling of template argument packs, const/static_cast, | |
938 | ; prefix ++ and --, and a class scope function used as a template | |
939 | ; argument. | |
940 | ; First selectable in G++ 4.7. | |
941 | ; | |
942 | ; 7: The version of the ABI that treats nullptr_t as a builtin type and | |
943 | ; corrects the mangling of lambdas in default argument scope. | |
944 | ; First selectable in G++ 4.8. | |
945 | ; | |
946 | ; 8: The version of the ABI that corrects the substitution behavior of | |
947 | ; function types with function-cv-qualifiers. | |
948 | ; First selectable in G++ 4.9 and default in G++ 5. | |
949 | ; | |
950 | ; 9: The version of the ABI that corrects the alignment of nullptr_t. | |
951 | ; First selectable and default in G++ 5.2. | |
952 | ; | |
953 | ; 10: The version of the ABI that mangles attributes that affect type | |
954 | ; identity, such as ia32 calling convention attributes (stdcall, etc.) | |
955 | ; Default in G++ 6 (set in c_common_post_options). | |
956 | ; | |
957 | ; 11: The version of the ABI that corrects mangling of sizeof... expressions | |
958 | ; and introduces new inheriting constructor handling. | |
959 | ; Default in G++ 7. | |
960 | ; | |
961 | ; 12: Corrects the calling convention for classes with only deleted copy/move | |
962 | ; constructors and changes passing/returning of empty records. | |
963 | ; Default in G++ 8.1. | |
964 | ; | |
965 | ; 13: Fixes the accidental change in 12 to the calling convention for classes | |
966 | ; with deleted copy constructor and trivial move constructor. | |
967 | ; Default in G++ 8.2. | |
968 | ; | |
969 | ; 14: Corrects the mangling of nullptr expression. | |
970 | ; Default in G++ 10. | |
971 | ; | |
972 | ; 15: Corrects G++ 10 ABI tag regression [PR98481]. | |
973 | ; Available, but not default, in G++ 10.3. | |
974 | ; | |
975 | ; 16: Changes the mangling of __alignof__ to be distinct from that of alignof. | |
976 | ; Adds missing 'on' in mangling of operator names in some cases. | |
977 | ; Default in G++ 11. | |
978 | ; | |
979 | ; Additional positive integers will be assigned as new versions of | |
980 | ; the ABI become the default version of the ABI. | |
981 | fabi-version= | |
982 | Common Joined RejectNegative UInteger Var(flag_abi_version) Init(0) | |
983 | The version of the C++ ABI in use. | |
984 | ||
985 | faggressive-loop-optimizations | |
986 | Common Var(flag_aggressive_loop_optimizations) Optimization Init(1) | |
987 | Aggressively optimize loops using language constraints. | |
988 | ||
989 | falign-functions | |
990 | Common Var(flag_align_functions) Optimization | |
991 | Align the start of functions. | |
992 | ||
993 | falign-functions= | |
994 | Common RejectNegative Joined Var(str_align_functions) Optimization | |
995 | ||
996 | flimit-function-alignment | |
997 | Common Var(flag_limit_function_alignment) Optimization Init(0) | |
998 | ||
999 | falign-jumps | |
1000 | Common Var(flag_align_jumps) Optimization | |
1001 | Align labels which are only reached by jumping. | |
1002 | ||
1003 | falign-jumps= | |
1004 | Common RejectNegative Joined Var(str_align_jumps) Optimization | |
1005 | ||
1006 | falign-labels | |
1007 | Common Var(flag_align_labels) Optimization | |
1008 | Align all labels. | |
1009 | ||
1010 | falign-labels= | |
1011 | Common RejectNegative Joined Var(str_align_labels) Optimization | |
1012 | ||
1013 | falign-loops | |
1014 | Common Var(flag_align_loops) Optimization | |
1015 | Align the start of loops. | |
1016 | ||
1017 | falign-loops= | |
1018 | Common RejectNegative Joined Var(str_align_loops) Optimization | |
1019 | ||
1020 | fallow-store-data-races | |
1021 | Common Var(flag_store_data_races) Optimization | |
1022 | Allow the compiler to introduce new data races on stores. | |
1023 | ||
1024 | fanalyzer | |
1025 | Common Var(flag_analyzer) | |
1026 | Enable static analysis pass. | |
1027 | ||
1028 | fargument-alias | |
1029 | Common Ignore | |
1030 | Does nothing. Preserved for backward compatibility. | |
1031 | ||
1032 | fargument-noalias | |
1033 | Common Ignore | |
1034 | Does nothing. Preserved for backward compatibility. | |
1035 | ||
1036 | fargument-noalias-global | |
1037 | Common Ignore | |
1038 | Does nothing. Preserved for backward compatibility. | |
1039 | ||
1040 | fargument-noalias-anything | |
1041 | Common Ignore | |
1042 | Does nothing. Preserved for backward compatibility. | |
1043 | ||
1044 | fsanitize= | |
1045 | Common Driver Joined | |
1046 | Select what to sanitize. | |
1047 | ||
1048 | fsanitize-coverage= | |
1049 | Common Joined RejectNegative Enum(sanitize_coverage) | |
1050 | Select type of coverage sanitization. | |
1051 | ||
1052 | Enum | |
1053 | Name(sanitize_coverage) Type(int) | |
1054 | ||
1055 | EnumValue | |
1056 | Enum(sanitize_coverage) String(trace-pc) Value(SANITIZE_COV_TRACE_PC) | |
1057 | ||
1058 | EnumValue | |
1059 | Enum(sanitize_coverage) String(trace-cmp) Value(SANITIZE_COV_TRACE_CMP) | |
1060 | ||
1061 | fasan-shadow-offset= | |
1062 | Common Joined RejectNegative Var(common_deferred_options) Defer | |
1063 | -fasan-shadow-offset=<number> Use custom shadow memory offset. | |
1064 | ||
1065 | fsanitize-sections= | |
1066 | Common Joined RejectNegative Var(common_deferred_options) Defer | |
1067 | -fsanitize-sections=<sec1,sec2,...> Sanitize global variables | |
1068 | in user-defined sections. | |
1069 | ||
1070 | fsanitize-recover= | |
1071 | Common Joined | |
1072 | After diagnosing undefined behavior attempt to continue execution. | |
1073 | ||
1074 | fsanitize-recover | |
1075 | Common | |
1076 | This switch is deprecated; use -fsanitize-recover= instead. | |
1077 | ||
1078 | fsanitize-address-use-after-scope | |
1079 | Common Driver Var(flag_sanitize_address_use_after_scope) Init(0) | |
1080 | ||
1081 | fsanitize-undefined-trap-on-error | |
1082 | Common Driver Var(flag_sanitize_undefined_trap_on_error) Init(0) | |
1083 | Use trap instead of a library function for undefined behavior sanitization. | |
1084 | ||
1085 | fasynchronous-unwind-tables | |
1086 | Common Var(flag_asynchronous_unwind_tables) Optimization | |
1087 | Generate unwind tables that are exact at each instruction boundary. | |
1088 | ||
1089 | fauto-inc-dec | |
1090 | Common Var(flag_auto_inc_dec) Init(1) Optimization | |
1091 | Generate auto-inc/dec instructions. | |
1092 | ||
1093 | fauto-profile | |
1094 | Common Var(flag_auto_profile) | |
1095 | Use sample profile information for call graph node weights. The default | |
1096 | profile file is fbdata.afdo in 'pwd'. | |
1097 | ||
1098 | fauto-profile= | |
1099 | Common Joined RejectNegative Var(auto_profile_file) | |
1100 | Use sample profile information for call graph node weights. The profile | |
1101 | file is specified in the argument. | |
1102 | ||
1103 | ; -fcheck-bounds causes gcc to generate array bounds checks. | |
1104 | ; For C, C++ and ObjC: defaults off. | |
1105 | ; For Java: defaults to on. | |
1106 | ; For Fortran: defaults to off. | |
1107 | fbounds-check | |
1108 | Common Var(flag_bounds_check) | |
1109 | Generate code to check bounds before indexing arrays. | |
1110 | ||
1111 | fbranch-count-reg | |
1112 | Common Var(flag_branch_on_count_reg) Optimization | |
1113 | Replace add, compare, branch with branch on count register. | |
1114 | ||
1115 | fbranch-probabilities | |
1116 | Common Var(flag_branch_probabilities) Optimization | |
1117 | Use profiling information for branch probabilities. | |
1118 | ||
1119 | fbranch-target-load-optimize | |
1120 | Common Ignore | |
1121 | Does nothing. Preserved for backward compatibility. | |
1122 | ||
1123 | fbranch-target-load-optimize2 | |
1124 | Common Ignore | |
1125 | Does nothing. Preserved for backward compatibility. | |
1126 | ||
1127 | fbtr-bb-exclusive | |
1128 | Common Ignore | |
1129 | Does nothing. Preserved for backward compatibility. | |
1130 | ||
1131 | fcallgraph-info | |
1132 | Common RejectNegative Var(flag_callgraph_info) Init(NO_CALLGRAPH_INFO); | |
1133 | Output callgraph information on a per-file basis. | |
1134 | ||
1135 | fcallgraph-info= | |
1136 | Common RejectNegative Joined | |
1137 | Output callgraph information on a per-file basis with decorations. | |
1138 | ||
1139 | fcall-saved- | |
1140 | Common Joined RejectNegative Var(common_deferred_options) Defer | |
1141 | -fcall-saved-<register> Mark <register> as being preserved across functions. | |
1142 | ||
1143 | fcall-used- | |
1144 | Common Joined RejectNegative Var(common_deferred_options) Defer | |
1145 | -fcall-used-<register> Mark <register> as being corrupted by function calls. | |
1146 | ||
1147 | ; Nonzero for -fcaller-saves: allocate values in regs that need to | |
1148 | ; be saved across function calls, if that produces overall better code. | |
1149 | ; Optional now, so people can test it. | |
1150 | fcaller-saves | |
1151 | Common Var(flag_caller_saves) Optimization | |
1152 | Save registers around function calls. | |
1153 | ||
1154 | fcheck-data-deps | |
1155 | Common Ignore | |
1156 | This switch is deprecated; do not use. | |
1157 | ||
1158 | fcheck-new | |
1159 | Common Var(flag_check_new) | |
1160 | Check the return value of new in C++. | |
1161 | ||
1162 | fchecking | |
1163 | Common Var(flag_checking) Init(CHECKING_P ? ENABLE_EXTRA_CHECKING ? 2 : 1 : 0) | |
1164 | Perform internal consistency checkings. | |
1165 | ||
1166 | fchecking= | |
1167 | Common Joined RejectNegative UInteger Var(flag_checking) | |
1168 | Perform internal consistency checkings. | |
1169 | ||
1170 | fcode-hoisting | |
1171 | Common Var(flag_code_hoisting) Optimization | |
1172 | Enable code hoisting. | |
1173 | ||
1174 | fcombine-stack-adjustments | |
1175 | Common Var(flag_combine_stack_adjustments) Optimization | |
1176 | Looks for opportunities to reduce stack adjustments and stack references. | |
1177 | ||
1178 | fcommon | |
1179 | Common Var(flag_no_common,0) Init(1) | |
1180 | Put uninitialized globals in the common section. | |
1181 | ||
1182 | fcompare-debug | |
1183 | Driver | |
1184 | ; Converted by the driver to -fcompare-debug= options. | |
1185 | ||
1186 | fcompare-debug= | |
1187 | Common Driver JoinedOrMissing RejectNegative Var(flag_compare_debug_opt) | |
1188 | -fcompare-debug[=<opts>] Compile with and without e.g. -gtoggle, and compare the final-insns dump. | |
1189 | ||
1190 | fcompare-debug-second | |
1191 | Common Driver RejectNegative Var(flag_compare_debug) | |
1192 | Run only the second compilation of -fcompare-debug. | |
1193 | ||
1194 | fcompare-elim | |
1195 | Common Var(flag_compare_elim_after_reload) Optimization | |
1196 | Perform comparison elimination after register allocation has finished. | |
1197 | ||
1198 | fconserve-stack | |
1199 | Common Var(flag_conserve_stack) Optimization | |
1200 | Do not perform optimizations increasing noticeably stack usage. | |
1201 | ||
1202 | fcprop-registers | |
1203 | Common Var(flag_cprop_registers) Optimization | |
1204 | Perform a register copy-propagation optimization pass. | |
1205 | ||
1206 | fcrossjumping | |
1207 | Common Var(flag_crossjumping) Optimization | |
1208 | Perform cross-jumping optimization. | |
1209 | ||
1210 | fcse-follow-jumps | |
1211 | Common Var(flag_cse_follow_jumps) Optimization | |
1212 | When running CSE, follow jumps to their targets. | |
1213 | ||
1214 | fcse-skip-blocks | |
1215 | Common Ignore | |
1216 | Does nothing. Preserved for backward compatibility. | |
1217 | ||
1218 | fcx-limited-range | |
1219 | Common Var(flag_cx_limited_range) Optimization SetByCombined | |
1220 | Omit range reduction step when performing complex division. | |
1221 | ||
1222 | fcx-fortran-rules | |
1223 | Common Var(flag_cx_fortran_rules) Optimization | |
1224 | Complex multiplication and division follow Fortran rules. | |
1225 | ||
1226 | fdata-sections | |
1227 | Common Var(flag_data_sections) | |
1228 | Place data items into their own section. | |
1229 | ||
1230 | fdbg-cnt-list | |
1231 | Common Var(flag_dbg_cnt_list) | |
1232 | List all available debugging counters with their limits and counts. | |
1233 | ||
1234 | fdbg-cnt= | |
1235 | Common RejectNegative Joined Var(common_deferred_options) Defer | |
1236 | -fdbg-cnt=<counter>[:<lower_limit1>-]<upper_limit1>[:<lower_limit2>-<upper_limit2>:...][,<counter>:...] Set the debug counter limit. | |
1237 | ||
1238 | fdebug-prefix-map= | |
1239 | Common Joined RejectNegative Var(common_deferred_options) Defer | |
1240 | -fdebug-prefix-map=<old>=<new> Map one directory name to another in debug information. | |
1241 | ||
1242 | ffile-prefix-map= | |
1243 | Common Joined RejectNegative Var(common_deferred_options) Defer | |
1244 | -ffile-prefix-map=<old>=<new> Map one directory name to another in compilation result. | |
1245 | ||
1246 | fdebug-types-section | |
1247 | Common Var(flag_debug_types_section) Init(0) | |
1248 | Output .debug_types section when using DWARF v4 debuginfo. | |
1249 | ||
1250 | ; Nonzero for -fdefer-pop: don't pop args after each function call | |
1251 | ; instead save them up to pop many calls' args with one insns. | |
1252 | fdefer-pop | |
1253 | Common Var(flag_defer_pop) Optimization | |
1254 | Defer popping functions args from stack until later. | |
1255 | ||
1256 | fdelayed-branch | |
1257 | Common Var(flag_delayed_branch) Optimization | |
1258 | Attempt to fill delay slots of branch instructions. | |
1259 | ||
1260 | fdelete-dead-exceptions | |
1261 | Common Var(flag_delete_dead_exceptions) Init(0) Optimization | |
1262 | Delete dead instructions that may throw exceptions. | |
1263 | ||
1264 | fdelete-null-pointer-checks | |
1265 | Common Var(flag_delete_null_pointer_checks) Init(-1) Optimization | |
1266 | Delete useless null pointer checks. | |
1267 | ||
1268 | fdevirtualize-at-ltrans | |
1269 | Common Var(flag_ltrans_devirtualize) | |
1270 | Stream extra data to support more aggressive devirtualization in LTO local transformation mode. | |
1271 | ||
1272 | fdevirtualize-speculatively | |
1273 | Common Var(flag_devirtualize_speculatively) Optimization | |
1274 | Perform speculative devirtualization. | |
1275 | ||
1276 | fdevirtualize | |
1277 | Common Var(flag_devirtualize) Optimization | |
1278 | Try to convert virtual calls to direct ones. | |
1279 | ||
1280 | fdiagnostics-show-location= | |
1281 | Common Joined RejectNegative Enum(diagnostic_prefixing_rule) | |
1282 | -fdiagnostics-show-location=[once|every-line] How often to emit source location at the beginning of line-wrapped diagnostics. | |
1283 | ||
1284 | ; Required for these enum values. | |
1285 | SourceInclude | |
1286 | pretty-print.h | |
1287 | ||
1288 | Enum | |
1289 | Name(diagnostic_prefixing_rule) Type(int) | |
1290 | ||
1291 | EnumValue | |
1292 | Enum(diagnostic_prefixing_rule) String(once) Value(DIAGNOSTICS_SHOW_PREFIX_ONCE) | |
1293 | ||
1294 | EnumValue | |
1295 | Enum(diagnostic_prefixing_rule) String(every-line) Value(DIAGNOSTICS_SHOW_PREFIX_EVERY_LINE) | |
1296 | ||
1297 | fdiagnostics-show-caret | |
1298 | Common Var(flag_diagnostics_show_caret) Init(1) | |
1299 | Show the source line with a caret indicating the column. | |
1300 | ||
1301 | fdiagnostics-show-labels | |
1302 | Common Var(flag_diagnostics_show_labels) Init(1) | |
1303 | Show labels annotating ranges of source code when showing source. | |
1304 | ||
1305 | fdiagnostics-show-line-numbers | |
1306 | Common Var(flag_diagnostics_show_line_numbers) Init(1) | |
1307 | Show line numbers in the left margin when showing source. | |
1308 | ||
1309 | fdiagnostics-color | |
1310 | Common Alias(fdiagnostics-color=,always,never) | |
1311 | ; | |
1312 | ||
1313 | fdiagnostics-color= | |
1314 | Driver Common Joined RejectNegative Var(flag_diagnostics_show_color) Enum(diagnostic_color_rule) Init(DIAGNOSTICS_COLOR_NO) | |
1315 | -fdiagnostics-color=[never|always|auto] Colorize diagnostics. | |
1316 | ||
1317 | ; Required for these enum values. | |
1318 | SourceInclude | |
1319 | diagnostic-color.h | |
1320 | ||
1321 | Enum | |
1322 | Name(diagnostic_color_rule) Type(int) | |
1323 | ||
1324 | EnumValue | |
1325 | Enum(diagnostic_color_rule) String(never) Value(DIAGNOSTICS_COLOR_NO) | |
1326 | ||
1327 | EnumValue | |
1328 | Enum(diagnostic_color_rule) String(always) Value(DIAGNOSTICS_COLOR_YES) | |
1329 | ||
1330 | EnumValue | |
1331 | Enum(diagnostic_color_rule) String(auto) Value(DIAGNOSTICS_COLOR_AUTO) | |
1332 | ||
1333 | fdiagnostics-urls= | |
1334 | Driver Common Joined RejectNegative Var(flag_diagnostics_show_urls) Enum(diagnostic_url_rule) Init(DIAGNOSTICS_URL_AUTO) | |
1335 | -fdiagnostics-urls=[never|always|auto] Embed URLs in diagnostics. | |
1336 | ||
1337 | ; Required for these enum values. | |
1338 | SourceInclude | |
1339 | diagnostic-url.h | |
1340 | ||
1341 | Enum | |
1342 | Name(diagnostic_url_rule) Type(int) | |
1343 | ||
1344 | EnumValue | |
1345 | Enum(diagnostic_url_rule) String(never) Value(DIAGNOSTICS_URL_NO) | |
1346 | ||
1347 | EnumValue | |
1348 | Enum(diagnostic_url_rule) String(always) Value(DIAGNOSTICS_URL_YES) | |
1349 | ||
1350 | EnumValue | |
1351 | Enum(diagnostic_url_rule) String(auto) Value(DIAGNOSTICS_URL_AUTO) | |
1352 | ||
1353 | fdiagnostics-column-unit= | |
1354 | Common Joined RejectNegative Enum(diagnostics_column_unit) | |
1355 | -fdiagnostics-column-unit=[display|byte] Select whether column numbers are output as display columns (default) or raw bytes. | |
1356 | ||
1357 | fdiagnostics-column-origin= | |
1358 | Common Joined RejectNegative UInteger | |
1359 | -fdiagnostics-column-origin=<number> Set the number of the first column. The default is 1-based as per GNU style, but some utilities may expect 0-based, for example. | |
1360 | ||
1361 | fdiagnostics-format= | |
1362 | Common Joined RejectNegative Enum(diagnostics_output_format) | |
1363 | -fdiagnostics-format=[text|json] Select output format. | |
1364 | ||
1365 | ; Required for these enum values. | |
1366 | SourceInclude | |
1367 | diagnostic.h | |
1368 | ||
1369 | Enum | |
1370 | Name(diagnostics_column_unit) Type(int) | |
1371 | ||
1372 | EnumValue | |
1373 | Enum(diagnostics_column_unit) String(display) Value(DIAGNOSTICS_COLUMN_UNIT_DISPLAY) | |
1374 | ||
1375 | EnumValue | |
1376 | Enum(diagnostics_column_unit) String(byte) Value(DIAGNOSTICS_COLUMN_UNIT_BYTE) | |
1377 | ||
1378 | Enum | |
1379 | Name(diagnostics_output_format) Type(int) | |
1380 | ||
1381 | EnumValue | |
1382 | Enum(diagnostics_output_format) String(text) Value(DIAGNOSTICS_OUTPUT_FORMAT_TEXT) | |
1383 | ||
1384 | EnumValue | |
1385 | Enum(diagnostics_output_format) String(json) Value(DIAGNOSTICS_OUTPUT_FORMAT_JSON) | |
1386 | ||
1387 | fdiagnostics-parseable-fixits | |
1388 | Common Var(flag_diagnostics_parseable_fixits) | |
1389 | Print fix-it hints in machine-readable form. | |
1390 | ||
1391 | fdiagnostics-generate-patch | |
1392 | Common Var(flag_diagnostics_generate_patch) | |
1393 | Print fix-it hints to stderr in unified diff format. | |
1394 | ||
1395 | fdiagnostics-show-option | |
1396 | Common Var(flag_diagnostics_show_option) Init(1) | |
1397 | Amend appropriate diagnostic messages with the command line option that controls them. | |
1398 | ||
1399 | fdiagnostics-show-cwe | |
1400 | Common Var(flag_diagnostics_show_cwe) Init(1) | |
1401 | Print CWE identifiers for diagnostic messages, where available. | |
1402 | ||
1403 | fdiagnostics-path-format= | |
1404 | Common Joined RejectNegative Var(flag_diagnostics_path_format) Enum(diagnostic_path_format) Init(DPF_INLINE_EVENTS) | |
1405 | Specify how to print any control-flow path associated with a diagnostic. | |
1406 | ||
1407 | fdiagnostics-plain-output | |
1408 | Driver Common RejectNegative | |
1409 | Turn off any diagnostics features that complicate the output, such as line numbers, color, and warning URLs. | |
1410 | ||
1411 | ftabstop= | |
1412 | Common Joined RejectNegative UInteger | |
1413 | -ftabstop=<number> Distance between tab stops for column reporting. | |
1414 | ||
1415 | Enum | |
1416 | Name(diagnostic_path_format) Type(int) | |
1417 | ||
1418 | EnumValue | |
1419 | Enum(diagnostic_path_format) String(none) Value(DPF_NONE) | |
1420 | ||
1421 | EnumValue | |
1422 | Enum(diagnostic_path_format) String(separate-events) Value(DPF_SEPARATE_EVENTS) | |
1423 | ||
1424 | EnumValue | |
1425 | Enum(diagnostic_path_format) String(inline-events) Value(DPF_INLINE_EVENTS) | |
1426 | ||
1427 | fdiagnostics-show-path-depths | |
1428 | Common Var(flag_diagnostics_show_path_depths) Init(0) | |
1429 | Show stack depths of events in paths. | |
1430 | ||
1431 | fdiagnostics-minimum-margin-width= | |
1432 | Common Joined UInteger Var(diagnostics_minimum_margin_width) Init(6) | |
1433 | Set minimum width of left margin of source code when showing source. | |
1434 | ||
1435 | fdisable- | |
1436 | Common Joined RejectNegative Var(common_deferred_options) Defer | |
1437 | -fdisable-[tree|rtl|ipa]-<pass>=range1+range2 Disable an optimization pass. | |
1438 | ||
1439 | fenable- | |
1440 | Common Joined RejectNegative Var(common_deferred_options) Defer | |
1441 | -fenable-[tree|rtl|ipa]-<pass>=range1+range2 Enable an optimization pass. | |
1442 | ||
1443 | fdump- | |
1444 | Common Joined RejectNegative Var(common_deferred_options) Defer | |
1445 | -fdump-<type> Dump various compiler internals to a file. | |
1446 | ||
1447 | fdump-final-insns | |
1448 | Driver RejectNegative | |
1449 | ||
1450 | fdump-final-insns= | |
1451 | Common RejectNegative Joined Var(flag_dump_final_insns) | |
1452 | -fdump-final-insns=filename Dump to filename the insns at the end of translation. | |
1453 | ||
1454 | fdump-go-spec= | |
1455 | Common RejectNegative Joined Var(flag_dump_go_spec) | |
1456 | -fdump-go-spec=filename Write all declarations to file as Go code. | |
1457 | ||
1458 | fdump-noaddr | |
1459 | Common Var(flag_dump_noaddr) | |
1460 | Suppress output of addresses in debugging dumps. | |
1461 | ||
1462 | freport-bug | |
1463 | Common Driver Var(flag_report_bug) | |
1464 | Collect and dump debug information into temporary file if ICE in C/C++ | |
1465 | compiler occurred. | |
1466 | ||
1467 | fdump-internal-locations | |
1468 | Common Var(flag_dump_locations) Init(0) | |
1469 | Dump detailed information on GCC's internal representation of source code locations. | |
1470 | ||
1471 | fdump-passes | |
1472 | Common Var(flag_dump_passes) Init(0) | |
1473 | Dump optimization passes. | |
1474 | ||
1475 | fdump-unnumbered | |
1476 | Common Var(flag_dump_unnumbered) | |
1477 | Suppress output of instruction numbers, line number notes and addresses in debugging dumps. | |
1478 | ||
1479 | fdump-unnumbered-links | |
1480 | Common Var(flag_dump_unnumbered_links) | |
1481 | Suppress output of previous and next insn numbers in debugging dumps. | |
1482 | ||
1483 | fdwarf2-cfi-asm | |
1484 | Common Var(flag_dwarf2_cfi_asm) Init(HAVE_GAS_CFI_DIRECTIVE) | |
1485 | Enable CFI tables via GAS assembler directives. | |
1486 | ||
1487 | fearly-inlining | |
1488 | Common Var(flag_early_inlining) Init(1) Optimization | |
1489 | Perform early inlining. | |
1490 | ||
1491 | feliminate-dwarf2-dups | |
1492 | Common Ignore | |
1493 | Does nothing. Preserved for backward compatibility. | |
1494 | ||
1495 | fipa-sra | |
1496 | Common Var(flag_ipa_sra) Init(0) Optimization | |
1497 | Perform interprocedural reduction of aggregates. | |
1498 | ||
1499 | feliminate-unused-debug-symbols | |
1500 | Common Var(flag_debug_only_used_symbols) Init(1) | |
1501 | Perform unused symbol elimination in debug info. | |
1502 | ||
1503 | feliminate-unused-debug-types | |
1504 | Common Var(flag_eliminate_unused_debug_types) Init(1) | |
1505 | Perform unused type elimination in debug info. | |
1506 | ||
1507 | femit-class-debug-always | |
1508 | Common Var(flag_emit_class_debug_always) Init(0) | |
1509 | Do not suppress C++ class debug information. | |
1510 | ||
1511 | fexceptions | |
1512 | Common Var(flag_exceptions) Optimization | |
1513 | Enable exception handling. | |
1514 | ||
1515 | fexpensive-optimizations | |
1516 | Common Var(flag_expensive_optimizations) Optimization | |
1517 | Perform a number of minor, expensive optimizations. | |
1518 | ||
1519 | fexcess-precision= | |
1520 | Common Joined RejectNegative Enum(excess_precision) Var(flag_excess_precision) Init(EXCESS_PRECISION_DEFAULT) Optimization SetByCombined | |
1521 | -fexcess-precision=[fast|standard] Specify handling of excess floating-point precision. | |
1522 | ||
1523 | Enum | |
1524 | Name(excess_precision) Type(enum excess_precision) UnknownError(unknown excess precision style %qs) | |
1525 | ||
1526 | EnumValue | |
1527 | Enum(excess_precision) String(fast) Value(EXCESS_PRECISION_FAST) | |
1528 | ||
1529 | EnumValue | |
1530 | Enum(excess_precision) String(standard) Value(EXCESS_PRECISION_STANDARD) | |
1531 | ||
1532 | ; Whether we permit the extended set of values for FLT_EVAL_METHOD | |
1533 | ; introduced in ISO/IEC TS 18661-3, or limit ourselves to those in C99/C11. | |
1534 | fpermitted-flt-eval-methods= | |
1535 | Common Joined RejectNegative Enum(permitted_flt_eval_methods) Var(flag_permitted_flt_eval_methods) Init(PERMITTED_FLT_EVAL_METHODS_DEFAULT) | |
1536 | -fpermitted-flt-eval-methods=[c11|ts-18661] Specify which values of FLT_EVAL_METHOD are permitted. | |
1537 | ||
1538 | Enum | |
1539 | Name(permitted_flt_eval_methods) Type(enum permitted_flt_eval_methods) UnknownError(unknown specification for the set of FLT_EVAL_METHOD values to permit %qs) | |
1540 | ||
1541 | EnumValue | |
1542 | Enum(permitted_flt_eval_methods) String(c11) Value(PERMITTED_FLT_EVAL_METHODS_C11) | |
1543 | ||
1544 | EnumValue | |
1545 | Enum(permitted_flt_eval_methods) String(ts-18661-3) Value(PERMITTED_FLT_EVAL_METHODS_TS_18661) | |
1546 | ||
1547 | ffast-math | |
1548 | Common Optimization | |
1549 | ||
1550 | ffat-lto-objects | |
1551 | Common Var(flag_fat_lto_objects) | |
1552 | Output lto objects containing both the intermediate language and binary output. | |
1553 | ||
1554 | ffinite-math-only | |
1555 | Common Var(flag_finite_math_only) Optimization SetByCombined | |
1556 | Assume no NaNs or infinities are generated. | |
1557 | ||
1558 | ffinite-loops | |
1559 | Common Var(flag_finite_loops) Optimization Init(0) | |
1560 | Assume that loops with an exit will terminate and not loop indefinitely. | |
1561 | ||
1562 | ffixed- | |
1563 | Common Joined RejectNegative Var(common_deferred_options) Defer | |
1564 | -ffixed-<register> Mark <register> as being unavailable to the compiler. | |
1565 | ||
1566 | ffloat-store | |
1567 | Common Var(flag_float_store) Optimization | |
1568 | Don't allocate floats and doubles in extended-precision registers. | |
1569 | ||
1570 | fforce-addr | |
1571 | Common Ignore | |
1572 | Does nothing. Preserved for backward compatibility. | |
1573 | ||
1574 | fforward-propagate | |
1575 | Common Var(flag_forward_propagate) Optimization | |
1576 | Perform a forward propagation pass on RTL. | |
1577 | ||
1578 | ffp-contract= | |
1579 | Common Joined RejectNegative Enum(fp_contract_mode) Var(flag_fp_contract_mode) Init(FP_CONTRACT_FAST) Optimization | |
1580 | -ffp-contract=[off|on|fast] Perform floating-point expression contraction. | |
1581 | ||
1582 | Enum | |
1583 | Name(fp_contract_mode) Type(enum fp_contract_mode) UnknownError(unknown floating point contraction style %qs) | |
1584 | ||
1585 | EnumValue | |
1586 | Enum(fp_contract_mode) String(off) Value(FP_CONTRACT_OFF) | |
1587 | ||
1588 | ; Not implemented, fall back to conservative FP_CONTRACT_OFF. | |
1589 | EnumValue | |
1590 | Enum(fp_contract_mode) String(on) Value(FP_CONTRACT_OFF) | |
1591 | ||
1592 | EnumValue | |
1593 | Enum(fp_contract_mode) String(fast) Value(FP_CONTRACT_FAST) | |
1594 | ||
1595 | ffp-int-builtin-inexact | |
1596 | Common Var(flag_fp_int_builtin_inexact) Init(1) Optimization | |
1597 | Allow built-in functions ceil, floor, round, trunc to raise \"inexact\" exceptions. | |
1598 | ||
1599 | ; Nonzero means don't put addresses of constant functions in registers. | |
1600 | ; Used for compiling the Unix kernel, where strange substitutions are | |
1601 | ; done on the assembly output. | |
1602 | ffunction-cse | |
1603 | Common Var(flag_no_function_cse,0) Optimization | |
1604 | Allow function addresses to be held in registers. | |
1605 | ||
1606 | ffunction-sections | |
1607 | Common Var(flag_function_sections) | |
1608 | Place each function into its own section. | |
1609 | ||
1610 | fgcse | |
1611 | Common Var(flag_gcse) Optimization | |
1612 | Perform global common subexpression elimination. | |
1613 | ||
1614 | fgcse-lm | |
1615 | Common Var(flag_gcse_lm) Init(1) Optimization | |
1616 | Perform enhanced load motion during global common subexpression elimination. | |
1617 | ||
1618 | fgcse-sm | |
1619 | Common Var(flag_gcse_sm) Init(0) Optimization | |
1620 | Perform store motion after global common subexpression elimination. | |
1621 | ||
1622 | fgcse-las | |
1623 | Common Var(flag_gcse_las) Init(0) Optimization | |
1624 | Perform redundant load after store elimination in global common subexpression | |
1625 | elimination. | |
1626 | ||
1627 | fgcse-after-reload | |
1628 | Common Var(flag_gcse_after_reload) Optimization | |
1629 | Perform global common subexpression elimination after register allocation has | |
1630 | finished. | |
1631 | ||
1632 | Enum | |
1633 | Name(dwarf_gnat_encodings) Type(int) | |
1634 | ||
1635 | EnumValue | |
1636 | Enum(dwarf_gnat_encodings) String(all) Value(DWARF_GNAT_ENCODINGS_ALL) | |
1637 | ||
1638 | EnumValue | |
1639 | Enum(dwarf_gnat_encodings) String(gdb) Value(DWARF_GNAT_ENCODINGS_GDB) | |
1640 | ||
1641 | EnumValue | |
1642 | Enum(dwarf_gnat_encodings) String(minimal) Value(DWARF_GNAT_ENCODINGS_MINIMAL) | |
1643 | ||
1644 | fgnat-encodings= | |
1645 | Common Enum(dwarf_gnat_encodings) Joined RejectNegative Undocumented Var(gnat_encodings) | |
1646 | -fgnat-encodings=[all|gdb|minimal] Select the balance between GNAT encodings and standard DWARF emitted in the debug information. | |
1647 | ||
1648 | ; This option is not documented yet as its semantics will change. | |
1649 | fgraphite | |
1650 | Common Var(flag_graphite) Optimization | |
1651 | Enable in and out of Graphite representation. | |
1652 | ||
1653 | fgraphite-identity | |
1654 | Common Var(flag_graphite_identity) Optimization | |
1655 | Enable Graphite Identity transformation. | |
1656 | ||
1657 | fhoist-adjacent-loads | |
1658 | Common Var(flag_hoist_adjacent_loads) Optimization | |
1659 | Enable hoisting adjacent loads to encourage generating conditional move | |
1660 | instructions. | |
1661 | ||
1662 | fkeep-gc-roots-live | |
1663 | Common Undocumented Var(flag_keep_gc_roots_live) Optimization | |
1664 | ; Always keep a pointer to a live memory block | |
1665 | ||
1666 | flarge-source-files | |
1667 | Common Var(flag_large_source_files) Init(0) | |
1668 | Improve GCC's ability to track column numbers in large source files, | |
1669 | at the expense of slower compilation. | |
1670 | ||
1671 | floop-parallelize-all | |
1672 | Common Var(flag_loop_parallelize_all) Optimization | |
1673 | Mark all loops as parallel. | |
1674 | ||
1675 | floop-strip-mine | |
1676 | Common Alias(floop-nest-optimize) | |
1677 | Enable loop nest transforms. Same as -floop-nest-optimize. | |
1678 | ||
1679 | floop-interchange | |
1680 | Common Var(flag_loop_interchange) Optimization | |
1681 | Enable loop interchange on trees. | |
1682 | ||
1683 | floop-block | |
1684 | Common Alias(floop-nest-optimize) | |
1685 | Enable loop nest transforms. Same as -floop-nest-optimize. | |
1686 | ||
1687 | floop-unroll-and-jam | |
1688 | Common Var(flag_unroll_jam) Optimization | |
1689 | Perform unroll-and-jam on loops. | |
1690 | ||
1691 | fgnu-tm | |
1692 | Common Var(flag_tm) | |
1693 | Enable support for GNU transactional memory. | |
1694 | ||
1695 | fgnu-unique | |
1696 | Common Var(flag_gnu_unique) Init(1) | |
1697 | Use STB_GNU_UNIQUE if supported by the assembler. | |
1698 | ||
1699 | floop-flatten | |
1700 | Common Ignore | |
1701 | Does nothing. Preserved for backward compatibility. | |
1702 | ||
1703 | floop-nest-optimize | |
1704 | Common Var(flag_loop_nest_optimize) Optimization | |
1705 | Enable the loop nest optimizer. | |
1706 | ||
1707 | fstrict-volatile-bitfields | |
1708 | Common Var(flag_strict_volatile_bitfields) Init(-1) Optimization | |
1709 | Force bitfield accesses to match their type width. | |
1710 | ||
1711 | fstore-merging | |
1712 | Common Var(flag_store_merging) Optimization | |
1713 | Merge adjacent stores. | |
1714 | ||
1715 | fguess-branch-probability | |
1716 | Common Var(flag_guess_branch_prob) Optimization | |
1717 | Enable guessing of branch probabilities. | |
1718 | ||
1719 | ; Nonzero means ignore `#ident' directives. 0 means handle them. | |
1720 | ; Generate position-independent code for executables if possible | |
1721 | ; On SVR4 targets, it also controls whether or not to emit a | |
1722 | ; string identifying the compiler. | |
1723 | fident | |
1724 | Common Var(flag_no_ident,0) | |
1725 | Process #ident directives. | |
1726 | ||
1727 | fif-conversion | |
1728 | Common Var(flag_if_conversion) Optimization | |
1729 | Perform conversion of conditional jumps to branchless equivalents. | |
1730 | ||
1731 | fif-conversion2 | |
1732 | Common Var(flag_if_conversion2) Optimization | |
1733 | Perform conversion of conditional jumps to conditional execution. | |
1734 | ||
1735 | fstack-reuse= | |
1736 | Common Joined RejectNegative Enum(stack_reuse_level) Var(flag_stack_reuse) Init(SR_ALL) Optimization | |
1737 | -fstack-reuse=[all|named_vars|none] Set stack reuse level for local variables. | |
1738 | ||
1739 | Enum | |
1740 | Name(stack_reuse_level) Type(enum stack_reuse_level) UnknownError(unknown Stack Reuse Level %qs) | |
1741 | ||
1742 | EnumValue | |
1743 | Enum(stack_reuse_level) String(all) Value(SR_ALL) | |
1744 | ||
1745 | EnumValue | |
1746 | Enum(stack_reuse_level) String(named_vars) Value(SR_NAMED_VARS) | |
1747 | ||
1748 | EnumValue | |
1749 | Enum(stack_reuse_level) String(none) Value(SR_NONE) | |
1750 | ||
1751 | ftree-loop-if-convert | |
1752 | Common Var(flag_tree_loop_if_convert) Init(-1) Optimization | |
1753 | Convert conditional jumps in innermost loops to branchless equivalents. | |
1754 | ||
1755 | ftree-loop-if-convert-stores | |
1756 | Common Ignore | |
1757 | Does nothing. Preserved for backward compatibility. | |
1758 | ||
1759 | ; -finhibit-size-directive inhibits output of .size for ELF. | |
1760 | ; This is used only for compiling crtstuff.c, | |
1761 | ; and it may be extended to other effects | |
1762 | ; needed for crtstuff.c on other systems. | |
1763 | finhibit-size-directive | |
1764 | Common Var(flag_inhibit_size_directive) | |
1765 | Do not generate .size directives. | |
1766 | ||
1767 | findirect-inlining | |
1768 | Common Var(flag_indirect_inlining) Optimization | |
1769 | Perform indirect inlining. | |
1770 | ||
1771 | ; General flag to enable inlining. Specifying -fno-inline will disable | |
1772 | ; all inlining apart from always-inline functions. | |
1773 | finline | |
1774 | Common Var(flag_no_inline,0) Init(0) Optimization | |
1775 | Enable inlining of function declared \"inline\", disabling disables all inlining. | |
1776 | ||
1777 | finline-small-functions | |
1778 | Common Var(flag_inline_small_functions) Optimization | |
1779 | Integrate functions into their callers when code size is known not to grow. | |
1780 | ||
1781 | finline-functions | |
1782 | Common Var(flag_inline_functions) Optimization | |
1783 | Integrate functions not declared \"inline\" into their callers when profitable. | |
1784 | ||
1785 | finline-functions-called-once | |
1786 | Common Var(flag_inline_functions_called_once) Optimization | |
1787 | Integrate functions only required by their single caller. | |
1788 | ||
1789 | finline-limit- | |
1790 | Common RejectNegative Joined Alias(finline-limit=) | |
1791 | ||
1792 | finline-limit= | |
1793 | Common RejectNegative Joined UInteger | |
1794 | -finline-limit=<number> Limit the size of inlined functions to <number>. | |
1795 | ||
1796 | finline-atomics | |
1797 | Common Var(flag_inline_atomics) Init(1) Optimization | |
1798 | Inline __atomic operations when a lock free instruction sequence is available. | |
1799 | ||
1800 | fcf-protection | |
1801 | Common RejectNegative Alias(fcf-protection=,full) | |
1802 | ||
1803 | fcf-protection= | |
1804 | Common Joined RejectNegative Enum(cf_protection_level) Var(flag_cf_protection) Init(CF_NONE) | |
1805 | -fcf-protection=[full|branch|return|none|check] Instrument functions with checks to verify jump/call/return control-flow transfer | |
1806 | instructions have valid targets. | |
1807 | ||
1808 | Enum | |
1809 | Name(cf_protection_level) Type(enum cf_protection_level) UnknownError(unknown Control-Flow Protection Level %qs) | |
1810 | ||
1811 | EnumValue | |
1812 | Enum(cf_protection_level) String(full) Value(CF_FULL) | |
1813 | ||
1814 | EnumValue | |
1815 | Enum(cf_protection_level) String(branch) Value(CF_BRANCH) | |
1816 | ||
1817 | EnumValue | |
1818 | Enum(cf_protection_level) String(return) Value(CF_RETURN) | |
1819 | ||
1820 | EnumValue | |
1821 | Enum(cf_protection_level) String(check) Value(CF_CHECK) | |
1822 | ||
1823 | EnumValue | |
1824 | Enum(cf_protection_level) String(none) Value(CF_NONE) | |
1825 | ||
1826 | finstrument-functions | |
1827 | Common Var(flag_instrument_function_entry_exit) | |
1828 | Instrument function entry and exit with profiling calls. | |
1829 | ||
1830 | finstrument-functions-exclude-function-list= | |
1831 | Common RejectNegative Joined | |
1832 | -finstrument-functions-exclude-function-list=name,... Do not instrument listed functions. | |
1833 | ||
1834 | finstrument-functions-exclude-file-list= | |
1835 | Common RejectNegative Joined | |
1836 | -finstrument-functions-exclude-file-list=filename,... Do not instrument functions listed in files. | |
1837 | ||
1838 | fipa-cp | |
1839 | Common Var(flag_ipa_cp) Optimization | |
1840 | Perform interprocedural constant propagation. | |
1841 | ||
1842 | fipa-cp-clone | |
1843 | Common Var(flag_ipa_cp_clone) Optimization | |
1844 | Perform cloning to make Interprocedural constant propagation stronger. | |
1845 | ||
1846 | fipa-cp-alignment | |
1847 | Common Ignore | |
1848 | Does nothing. Preserved for backward compatibility. | |
1849 | ||
1850 | fipa-bit-cp | |
1851 | Common Var(flag_ipa_bit_cp) Optimization | |
1852 | Perform interprocedural bitwise constant propagation. | |
1853 | ||
1854 | fipa-modref | |
1855 | Common Var(flag_ipa_modref) Optimization | |
1856 | Perform interprocedural modref analysis. | |
1857 | ||
1858 | fipa-profile | |
1859 | Common Var(flag_ipa_profile) Init(0) Optimization | |
1860 | Perform interprocedural profile propagation. | |
1861 | ||
1862 | fipa-pta | |
1863 | Common Var(flag_ipa_pta) Init(0) Optimization | |
1864 | Perform interprocedural points-to analysis. | |
1865 | ||
1866 | fipa-pure-const | |
1867 | Common Var(flag_ipa_pure_const) Init(0) Optimization | |
1868 | Discover pure and const functions. | |
1869 | ||
1870 | fipa-icf | |
1871 | Common Var(flag_ipa_icf) Optimization | |
1872 | Perform Identical Code Folding for functions and read-only variables. | |
1873 | ||
1874 | fipa-icf-functions | |
1875 | Common Var(flag_ipa_icf_functions) Optimization | |
1876 | Perform Identical Code Folding for functions. | |
1877 | ||
1878 | fipa-icf-variables | |
1879 | Common Var(flag_ipa_icf_variables) Optimization | |
1880 | Perform Identical Code Folding for variables. | |
1881 | ||
1882 | fipa-reference | |
1883 | Common Var(flag_ipa_reference) Init(0) Optimization | |
1884 | Discover read-only and non addressable static variables. | |
1885 | ||
1886 | fipa-reference-addressable | |
1887 | Common Var(flag_ipa_reference_addressable) Init(0) Optimization | |
1888 | Discover read-only, write-only and non-addressable static variables. | |
1889 | ||
1890 | fipa-stack-alignment | |
1891 | Common Var(flag_ipa_stack_alignment) Init(1) Optimization | |
1892 | Reduce stack alignment on call sites if possible. | |
1893 | ||
1894 | fipa-matrix-reorg | |
1895 | Common Ignore | |
1896 | Does nothing. Preserved for backward compatibility. | |
1897 | ||
1898 | fipa-struct-reorg | |
1899 | Common Ignore | |
1900 | Does nothing. Preserved for backward compatibility. | |
1901 | ||
1902 | fipa-vrp | |
1903 | Common Var(flag_ipa_vrp) Optimization | |
1904 | Perform IPA Value Range Propagation. | |
1905 | ||
1906 | fira-algorithm= | |
1907 | Common Joined RejectNegative Enum(ira_algorithm) Var(flag_ira_algorithm) Init(IRA_ALGORITHM_CB) Optimization | |
1908 | -fira-algorithm=[CB|priority] Set the used IRA algorithm. | |
1909 | ||
1910 | Enum | |
1911 | Name(ira_algorithm) Type(enum ira_algorithm) UnknownError(unknown IRA algorithm %qs) | |
1912 | ||
1913 | EnumValue | |
1914 | Enum(ira_algorithm) String(CB) Value(IRA_ALGORITHM_CB) | |
1915 | ||
1916 | EnumValue | |
1917 | Enum(ira_algorithm) String(priority) Value(IRA_ALGORITHM_PRIORITY) | |
1918 | ||
1919 | fira-region= | |
1920 | Common Joined RejectNegative Enum(ira_region) Var(flag_ira_region) Init(IRA_REGION_AUTODETECT) Optimization | |
1921 | -fira-region=[one|all|mixed] Set regions for IRA. | |
1922 | ||
1923 | Enum | |
1924 | Name(ira_region) Type(enum ira_region) UnknownError(unknown IRA region %qs) | |
1925 | ||
1926 | EnumValue | |
1927 | Enum(ira_region) String(one) Value(IRA_REGION_ONE) | |
1928 | ||
1929 | EnumValue | |
1930 | Enum(ira_region) String(all) Value(IRA_REGION_ALL) | |
1931 | ||
1932 | EnumValue | |
1933 | Enum(ira_region) String(mixed) Value(IRA_REGION_MIXED) | |
1934 | ||
1935 | fira-hoist-pressure | |
1936 | Common Var(flag_ira_hoist_pressure) Init(1) Optimization | |
1937 | Use IRA based register pressure calculation | |
1938 | in RTL hoist optimizations. | |
1939 | ||
1940 | fira-loop-pressure | |
1941 | Common Var(flag_ira_loop_pressure) Optimization | |
1942 | Use IRA based register pressure calculation | |
1943 | in RTL loop optimizations. | |
1944 | ||
1945 | fira-share-save-slots | |
1946 | Common Var(flag_ira_share_save_slots) Init(1) Optimization | |
1947 | Share slots for saving different hard registers. | |
1948 | ||
1949 | fira-share-spill-slots | |
1950 | Common Var(flag_ira_share_spill_slots) Init(1) Optimization | |
1951 | Share stack slots for spilled pseudo-registers. | |
1952 | ||
1953 | fira-verbose= | |
1954 | Common RejectNegative Joined UInteger Var(flag_ira_verbose) Init(5) | |
1955 | -fira-verbose=<number> Control IRA's level of diagnostic messages. | |
1956 | ||
1957 | fivopts | |
1958 | Common Var(flag_ivopts) Init(1) Optimization | |
1959 | Optimize induction variables on trees. | |
1960 | ||
1961 | fjump-tables | |
1962 | Common Var(flag_jump_tables) Init(1) Optimization | |
1963 | Use jump tables for sufficiently large switch statements. | |
1964 | ||
1965 | fbit-tests | |
1966 | Common Var(flag_bit_tests) Init(1) Optimization | |
1967 | Use bit tests for sufficiently large switch statements. | |
1968 | ||
1969 | fkeep-inline-functions | |
1970 | Common Var(flag_keep_inline_functions) | |
1971 | Generate code for functions even if they are fully inlined. | |
1972 | ||
1973 | fkeep-static-functions | |
1974 | Common Var(flag_keep_static_functions) | |
1975 | Generate code for static functions even if they are never called. | |
1976 | ||
1977 | fkeep-static-consts | |
1978 | Common Var(flag_keep_static_consts) Init(1) | |
1979 | Emit static const variables even if they are not used. | |
1980 | ||
1981 | fleading-underscore | |
1982 | Common Var(flag_leading_underscore) Init(-1) | |
1983 | Give external symbols a leading underscore. | |
1984 | ||
1985 | floop-optimize | |
1986 | Common Ignore | |
1987 | Does nothing. Preserved for backward compatibility. | |
1988 | ||
1989 | flra-remat | |
1990 | Common Var(flag_lra_remat) Optimization | |
1991 | Do CFG-sensitive rematerialization in LRA. | |
1992 | ||
1993 | flto | |
1994 | Common | |
1995 | Enable link-time optimization. | |
1996 | ||
1997 | flto= | |
1998 | Common RejectNegative Joined Var(flag_lto) | |
1999 | Link-time optimization with number of parallel jobs or jobserver. | |
2000 | ||
2001 | Enum | |
2002 | Name(lto_partition_model) Type(enum lto_partition_model) UnknownError(unknown LTO partitioning model %qs) | |
2003 | ||
2004 | EnumValue | |
2005 | Enum(lto_partition_model) String(none) Value(LTO_PARTITION_NONE) | |
2006 | ||
2007 | EnumValue | |
2008 | Enum(lto_partition_model) String(one) Value(LTO_PARTITION_ONE) | |
2009 | ||
2010 | EnumValue | |
2011 | Enum(lto_partition_model) String(balanced) Value(LTO_PARTITION_BALANCED) | |
2012 | ||
2013 | EnumValue | |
2014 | Enum(lto_partition_model) String(1to1) Value(LTO_PARTITION_1TO1) | |
2015 | ||
2016 | EnumValue | |
2017 | Enum(lto_partition_model) String(max) Value(LTO_PARTITION_MAX) | |
2018 | ||
2019 | flto-partition= | |
2020 | Common Joined RejectNegative Enum(lto_partition_model) Var(flag_lto_partition) Init(LTO_PARTITION_BALANCED) | |
2021 | Specify the algorithm to partition symbols and vars at linktime. | |
2022 | ||
2023 | ; The initial value of -1 comes from Z_DEFAULT_COMPRESSION in zlib.h. | |
2024 | flto-compression-level= | |
2025 | Common Joined RejectNegative UInteger Var(flag_lto_compression_level) Init(-1) IntegerRange(0, 19) | |
2026 | -flto-compression-level=<number> Use zlib/zstd compression level <number> for IL. | |
2027 | ||
2028 | flto-odr-type-merging | |
2029 | Common Ignore | |
2030 | Does nothing. Preserved for backward compatibility. | |
2031 | ||
2032 | flto-report | |
2033 | Common Var(flag_lto_report) Init(0) | |
2034 | Report various link-time optimization statistics. | |
2035 | ||
2036 | flto-report-wpa | |
2037 | Common Var(flag_lto_report_wpa) Init(0) | |
2038 | Report various link-time optimization statistics for WPA only. | |
2039 | ||
2040 | fmath-errno | |
2041 | Common Var(flag_errno_math) Init(1) Optimization SetByCombined | |
2042 | Set errno after built-in math functions. | |
2043 | ||
2044 | fmax-errors= | |
2045 | Common Joined RejectNegative UInteger Var(flag_max_errors) | |
2046 | -fmax-errors=<number> Maximum number of errors to report. | |
2047 | ||
2048 | fmem-report | |
2049 | Common Var(mem_report) | |
2050 | Report on permanent memory allocation. | |
2051 | ||
2052 | fmem-report-wpa | |
2053 | Common Var(mem_report_wpa) | |
2054 | Report on permanent memory allocation in WPA only. | |
2055 | ||
2056 | ; This will attempt to merge constant section constants, if 1 only | |
2057 | ; string constants and constants from constant pool, if 2 also constant | |
2058 | ; variables. | |
2059 | fmerge-all-constants | |
2060 | Common Var(flag_merge_constants,2) Init(1) | |
2061 | Attempt to merge identical constants and constant variables. | |
2062 | ||
2063 | fmerge-constants | |
2064 | Common Var(flag_merge_constants,1) | |
2065 | Attempt to merge identical constants across compilation units. | |
2066 | ||
2067 | fmerge-debug-strings | |
2068 | Common Var(flag_merge_debug_strings) Init(1) | |
2069 | Attempt to merge identical debug strings across compilation units. | |
2070 | ||
2071 | fmessage-length= | |
2072 | Common RejectNegative Joined UInteger | |
2073 | -fmessage-length=<number> Limit diagnostics to <number> characters per line. 0 suppresses line-wrapping. | |
2074 | ||
2075 | fmodulo-sched | |
2076 | Common Var(flag_modulo_sched) Optimization | |
2077 | Perform SMS based modulo scheduling before the first scheduling pass. | |
2078 | ||
2079 | fmodulo-sched-allow-regmoves | |
2080 | Common Var(flag_modulo_sched_allow_regmoves) Optimization | |
2081 | Perform SMS based modulo scheduling with register moves allowed. | |
2082 | ||
2083 | fmove-loop-invariants | |
2084 | Common Var(flag_move_loop_invariants) Optimization | |
2085 | Move loop invariant computations out of loops. | |
2086 | ||
2087 | fdce | |
2088 | Common Var(flag_dce) Init(1) Optimization | |
2089 | Use the RTL dead code elimination pass. | |
2090 | ||
2091 | fdse | |
2092 | Common Var(flag_dse) Init(0) Optimization | |
2093 | Use the RTL dead store elimination pass. | |
2094 | ||
2095 | freschedule-modulo-scheduled-loops | |
2096 | Common Var(flag_resched_modulo_sched) Optimization | |
2097 | Enable/Disable the traditional scheduling in loops that already passed modulo scheduling. | |
2098 | ||
2099 | fnon-call-exceptions | |
2100 | Common Var(flag_non_call_exceptions) Optimization | |
2101 | Support synchronous non-call exceptions. | |
2102 | ||
2103 | foffload= | |
2104 | Driver Joined MissingArgError(targets missing after %qs) | |
2105 | ||
2106 | foffload-options= | |
2107 | Common Driver Joined MissingArgError(options or targets=options missing after %qs) | |
2108 | -foffload-options=<targets>=<options> Specify options for the offloading targets. | |
2109 | ||
2110 | foffload-abi= | |
2111 | Common Joined RejectNegative Enum(offload_abi) Var(flag_offload_abi) Init(OFFLOAD_ABI_UNSET) | |
2112 | -foffload-abi=[lp64|ilp32] Set the ABI to use in an offload compiler. | |
2113 | ||
2114 | Enum | |
2115 | Name(offload_abi) Type(enum offload_abi) UnknownError(unknown offload ABI %qs) | |
2116 | ||
2117 | EnumValue | |
2118 | Enum(offload_abi) String(ilp32) Value(OFFLOAD_ABI_ILP32) | |
2119 | ||
2120 | EnumValue | |
2121 | Enum(offload_abi) String(lp64) Value(OFFLOAD_ABI_LP64) | |
2122 | ||
2123 | fomit-frame-pointer | |
2124 | Common Var(flag_omit_frame_pointer) Optimization | |
2125 | When possible do not generate stack frames. | |
2126 | ||
2127 | fopt-info | |
2128 | Common Var(flag_opt_info) Optimization | |
2129 | Enable all optimization info dumps on stderr. | |
2130 | ||
2131 | fopt-info- | |
2132 | Common Joined RejectNegative Var(common_deferred_options) Defer | |
2133 | -fopt-info[-<type>=filename] Dump compiler optimization details. | |
2134 | ||
2135 | fsave-optimization-record | |
2136 | Common Var(flag_save_optimization_record) Optimization | |
2137 | Write a SRCFILE.opt-record.json file detailing what optimizations were performed. | |
2138 | ||
2139 | foptimize-register-move | |
2140 | Common Ignore | |
2141 | Does nothing. Preserved for backward compatibility. | |
2142 | ||
2143 | foptimize-sibling-calls | |
2144 | Common Var(flag_optimize_sibling_calls) Optimization | |
2145 | Optimize sibling and tail recursive calls. | |
2146 | ||
2147 | fpartial-inlining | |
2148 | Common Var(flag_partial_inlining) Optimization | |
2149 | Perform partial inlining. | |
2150 | ||
2151 | fpre-ipa-mem-report | |
2152 | Common Var(pre_ipa_mem_report) | |
2153 | Report on memory allocation before interprocedural optimization. | |
2154 | ||
2155 | fpost-ipa-mem-report | |
2156 | Common Var(post_ipa_mem_report) | |
2157 | Report on memory allocation before interprocedural optimization. | |
2158 | ||
2159 | fpack-struct | |
2160 | Common Var(flag_pack_struct) Optimization | |
2161 | Pack structure members together without holes. | |
2162 | ||
2163 | fpack-struct= | |
2164 | Common RejectNegative Joined UInteger Optimization | |
2165 | -fpack-struct=<number> Set initial maximum structure member alignment. | |
2166 | ||
2167 | fpcc-struct-return | |
2168 | Common Var(flag_pcc_struct_return,1) Init(DEFAULT_PCC_STRUCT_RETURN) | |
2169 | Return small aggregates in memory, not registers. | |
2170 | ||
2171 | fpeel-loops | |
2172 | Common Var(flag_peel_loops) Optimization | |
2173 | Perform loop peeling. | |
2174 | ||
2175 | fpeephole | |
2176 | Common Var(flag_no_peephole,0) Optimization | |
2177 | Enable machine specific peephole optimizations. | |
2178 | ||
2179 | fpeephole2 | |
2180 | Common Var(flag_peephole2) Optimization | |
2181 | Enable an RTL peephole pass before sched2. | |
2182 | ||
2183 | fPIC | |
2184 | Common Var(flag_pic,2) Negative(fPIE) Init(-1) | |
2185 | Generate position-independent code if possible (large mode). | |
2186 | ||
2187 | fPIE | |
2188 | Common Var(flag_pie,2) Negative(fpic) Init(-1) | |
2189 | Generate position-independent code for executables if possible (large mode). | |
2190 | ||
2191 | fpic | |
2192 | Common Var(flag_pic,1) Negative(fpie) Init(-1) | |
2193 | Generate position-independent code if possible (small mode). | |
2194 | ||
2195 | fpie | |
2196 | Common Var(flag_pie,1) Negative(fPIC) Init(-1) | |
2197 | Generate position-independent code for executables if possible (small mode). | |
2198 | ||
2199 | fplt | |
2200 | Common Var(flag_plt) Init(1) Optimization | |
2201 | Use PLT for PIC calls (-fno-plt: load the address from GOT at call site). | |
2202 | ||
2203 | fplugin= | |
2204 | Common Joined RejectNegative Var(common_deferred_options) Defer | |
2205 | Specify a plugin to load. | |
2206 | ||
2207 | fplugin-arg- | |
2208 | Common Joined RejectNegative Var(common_deferred_options) Defer | |
2209 | -fplugin-arg-<name>-<key>[=<value>] Specify argument <key>=<value> for plugin <name>. | |
2210 | ||
2211 | fpredictive-commoning | |
2212 | Common Var(flag_predictive_commoning) Optimization | |
2213 | Run predictive commoning optimization. | |
2214 | ||
2215 | fprefetch-loop-arrays | |
2216 | Common Var(flag_prefetch_loop_arrays) Init(-1) Optimization | |
2217 | Generate prefetch instructions, if available, for arrays in loops. | |
2218 | ||
2219 | fprofile | |
2220 | Common Var(profile_flag) | |
2221 | Enable basic program profiling code. | |
2222 | ||
2223 | fprofile-abs-path | |
2224 | Common Var(profile_abs_path_flag) | |
2225 | Generate absolute source path names for gcov. | |
2226 | ||
2227 | fprofile-arcs | |
2228 | Common Var(profile_arc_flag) | |
2229 | Insert arc-based program profiling code. | |
2230 | ||
2231 | fprofile-dir= | |
2232 | Common Joined RejectNegative Var(profile_data_prefix) | |
2233 | Set the top-level directory for storing the profile data. | |
2234 | The default is 'pwd'. | |
2235 | ||
2236 | fprofile-note= | |
2237 | Common Joined RejectNegative Var(profile_note_location) | |
2238 | Select the name for storing the profile note file. | |
2239 | ||
2240 | fprofile-correction | |
2241 | Common Var(flag_profile_correction) | |
2242 | Enable correction of flow inconsistent profile data input. | |
2243 | ||
2244 | fprofile-update= | |
2245 | Common Joined RejectNegative Enum(profile_update) Var(flag_profile_update) Init(PROFILE_UPDATE_SINGLE) | |
2246 | -fprofile-update=[single|atomic|prefer-atomic] Set the profile update method. | |
2247 | ||
2248 | fprofile-filter-files= | |
2249 | Common Joined RejectNegative Var(flag_profile_filter_files) | |
2250 | Instrument only functions from files whose name matches any of the regular expressions (separated by semi-colons). | |
2251 | ||
2252 | fprofile-exclude-files= | |
2253 | Common Joined RejectNegative Var(flag_profile_exclude_files) | |
2254 | Instrument only functions from files whose name does not match any of the regular expressions (separated by semi-colons). | |
2255 | ||
2256 | Enum | |
2257 | Name(profile_reproducibility) Type(enum profile_reproducibility) UnknownError(unknown profile reproducibility method %qs) | |
2258 | ||
2259 | EnumValue | |
2260 | Enum(profile_reproducibility) String(serial) Value(PROFILE_REPRODUCIBILITY_SERIAL) | |
2261 | ||
2262 | EnumValue | |
2263 | Enum(profile_reproducibility) String(parallel-runs) Value(PROFILE_REPRODUCIBILITY_PARALLEL_RUNS) | |
2264 | ||
2265 | EnumValue | |
2266 | Enum(profile_reproducibility) String(multithreaded) Value(PROFILE_REPRODUCIBILITY_MULTITHREADED) | |
2267 | ||
2268 | fprofile-reproducible= | |
2269 | Common Joined RejectNegative Var(flag_profile_reproducible) Enum(profile_reproducibility) Init(PROFILE_REPRODUCIBILITY_SERIAL) | |
2270 | -fprofile-reproducible=[serial|parallel-runs|multithreaded] Control level of reproducibility of profile gathered by -fprofile-generate. | |
2271 | ||
2272 | Enum | |
2273 | Name(profile_update) Type(enum profile_update) UnknownError(unknown profile update method %qs) | |
2274 | ||
2275 | EnumValue | |
2276 | Enum(profile_update) String(single) Value(PROFILE_UPDATE_SINGLE) | |
2277 | ||
2278 | EnumValue | |
2279 | Enum(profile_update) String(atomic) Value(PROFILE_UPDATE_ATOMIC) | |
2280 | ||
2281 | EnumValue | |
2282 | Enum(profile_update) String(prefer-atomic) Value(PROFILE_UPDATE_PREFER_ATOMIC) | |
2283 | ||
2284 | fprofile-prefix-path= | |
2285 | Common Joined RejectNegative Var(profile_prefix_path) | |
2286 | Remove prefix from absolute path before mangling name for -fprofile-generate= and -fprofile-use=. | |
2287 | ||
2288 | fprofile-generate | |
2289 | Common | |
2290 | Enable common options for generating profile info for profile feedback directed optimizations. | |
2291 | ||
2292 | fprofile-generate= | |
2293 | Common Joined RejectNegative | |
2294 | Enable common options for generating profile info for profile feedback directed optimizations, and set -fprofile-dir=. | |
2295 | ||
2296 | fprofile-info-section | |
2297 | Common RejectNegative | |
2298 | Register the profile information in the .gcov_info section instead of using a constructor/destructor. | |
2299 | ||
2300 | fprofile-info-section= | |
2301 | Common Joined RejectNegative Var(profile_info_section) | |
2302 | Register the profile information in the specified section instead of using a constructor/destructor. | |
2303 | ||
2304 | fprofile-partial-training | |
2305 | Common Var(flag_profile_partial_training) Optimization | |
2306 | Do not assume that functions never executed during the train run are cold. | |
2307 | ||
2308 | fprofile-use | |
2309 | Common Var(flag_profile_use) | |
2310 | Enable common options for performing profile feedback directed optimizations. | |
2311 | ||
2312 | fprofile-use= | |
2313 | Common Joined RejectNegative | |
2314 | Enable common options for performing profile feedback directed optimizations, and set -fprofile-dir=. | |
2315 | ||
2316 | fprofile-values | |
2317 | Common Var(flag_profile_values) | |
2318 | Insert code to profile values of expressions. | |
2319 | ||
2320 | fprofile-report | |
2321 | Common Var(profile_report) | |
2322 | Report on consistency of profile. | |
2323 | ||
2324 | fprofile-reorder-functions | |
2325 | Common Var(flag_profile_reorder_functions) Optimization | |
2326 | Enable function reordering that improves code placement. | |
2327 | ||
2328 | fpatchable-function-entry= | |
2329 | Common Var(flag_patchable_function_entry) Joined Optimization | |
2330 | Insert NOP instructions at each function entry. | |
2331 | ||
2332 | frandom-seed | |
2333 | Common Var(common_deferred_options) Defer | |
2334 | ||
2335 | frandom-seed= | |
2336 | Common Joined RejectNegative Var(common_deferred_options) Defer | |
2337 | -frandom-seed=<string> Make compile reproducible using <string>. | |
2338 | ||
2339 | ; This switch causes the command line that was used to create an | |
2340 | ; object file to be recorded into the object file. The exact format | |
2341 | ; of this recording is target and binary file format dependent. | |
2342 | ; It is related to the -fverbose-asm switch, but that switch only | |
2343 | ; records information in the assembler output file as comments, so | |
2344 | ; they never reach the object file. | |
2345 | frecord-gcc-switches | |
2346 | Common Var(flag_record_gcc_switches) | |
2347 | Record gcc command line switches in the object file. | |
2348 | ||
2349 | freg-struct-return | |
2350 | Common Var(flag_pcc_struct_return,0) Optimization | |
2351 | Return small aggregates in registers. | |
2352 | ||
2353 | fregmove | |
2354 | Common Ignore | |
2355 | Does nothing. Preserved for backward compatibility. | |
2356 | ||
2357 | flifetime-dse | |
2358 | Common Var(flag_lifetime_dse,2) Init(2) Optimization | |
2359 | Tell DSE that the storage for a C++ object is dead when the constructor | |
2360 | starts and when the destructor finishes. | |
2361 | ||
2362 | flifetime-dse= | |
2363 | Common Joined RejectNegative UInteger Var(flag_lifetime_dse) Optimization IntegerRange(0, 2) | |
2364 | ||
2365 | flive-patching | |
2366 | Common RejectNegative Alias(flive-patching=,inline-clone) Optimization | |
2367 | ||
2368 | flive-patching= | |
2369 | Common Joined RejectNegative Enum(live_patching_level) Var(flag_live_patching) Init(LIVE_PATCHING_NONE) Optimization | |
2370 | -flive-patching=[inline-only-static|inline-clone] Control IPA | |
2371 | optimizations to provide a safe compilation for live-patching. At the same | |
2372 | time, provides multiple-level control on the enabled IPA optimizations. | |
2373 | ||
2374 | Enum | |
2375 | Name(live_patching_level) Type(enum live_patching_level) UnknownError(unknown Live-Patching Level %qs) | |
2376 | ||
2377 | EnumValue | |
2378 | Enum(live_patching_level) String(inline-only-static) Value(LIVE_PATCHING_INLINE_ONLY_STATIC) | |
2379 | ||
2380 | EnumValue | |
2381 | Enum(live_patching_level) String(inline-clone) Value(LIVE_PATCHING_INLINE_CLONE) | |
2382 | ||
2383 | fallocation-dce | |
2384 | Common Var(flag_allocation_dce) Init(1) Optimization | |
2385 | Tell DCE to remove unused C++ allocations. | |
2386 | ||
2387 | flive-range-shrinkage | |
2388 | Common Var(flag_live_range_shrinkage) Init(0) Optimization | |
2389 | Relief of register pressure through live range shrinkage. | |
2390 | ||
2391 | frename-registers | |
2392 | Common Var(flag_rename_registers) Init(2) Optimization | |
2393 | Perform a register renaming optimization pass. | |
2394 | ||
2395 | fschedule-fusion | |
2396 | Common Var(flag_schedule_fusion) Init(2) Optimization | |
2397 | Perform a target dependent instruction fusion optimization pass. | |
2398 | ||
2399 | freorder-blocks | |
2400 | Common Var(flag_reorder_blocks) Optimization | |
2401 | Reorder basic blocks to improve code placement. | |
2402 | ||
2403 | freorder-blocks-algorithm= | |
2404 | Common Joined RejectNegative Enum(reorder_blocks_algorithm) Var(flag_reorder_blocks_algorithm) Init(REORDER_BLOCKS_ALGORITHM_SIMPLE) Optimization | |
2405 | -freorder-blocks-algorithm=[simple|stc] Set the used basic block reordering algorithm. | |
2406 | ||
2407 | Enum | |
2408 | Name(reorder_blocks_algorithm) Type(enum reorder_blocks_algorithm) UnknownError(unknown basic block reordering algorithm %qs) | |
2409 | ||
2410 | EnumValue | |
2411 | Enum(reorder_blocks_algorithm) String(simple) Value(REORDER_BLOCKS_ALGORITHM_SIMPLE) | |
2412 | ||
2413 | EnumValue | |
2414 | Enum(reorder_blocks_algorithm) String(stc) Value(REORDER_BLOCKS_ALGORITHM_STC) | |
2415 | ||
2416 | freorder-blocks-and-partition | |
2417 | Common Var(flag_reorder_blocks_and_partition) Optimization | |
2418 | Reorder basic blocks and partition into hot and cold sections. | |
2419 | ||
2420 | freorder-functions | |
2421 | Common Var(flag_reorder_functions) Optimization | |
2422 | Reorder functions to improve code placement. | |
2423 | ||
2424 | frerun-cse-after-loop | |
2425 | Common Var(flag_rerun_cse_after_loop) Optimization | |
2426 | Add a common subexpression elimination pass after loop optimizations. | |
2427 | ||
2428 | frerun-loop-opt | |
2429 | Common Ignore | |
2430 | Does nothing. Preserved for backward compatibility. | |
2431 | ||
2432 | frounding-math | |
2433 | Common Var(flag_rounding_math) Optimization SetByCombined | |
2434 | Disable optimizations that assume default FP rounding behavior. | |
2435 | ||
2436 | fsched-interblock | |
2437 | Common Var(flag_schedule_interblock) Init(1) Optimization | |
2438 | Enable scheduling across basic blocks. | |
2439 | ||
2440 | fsched-pressure | |
2441 | Common Var(flag_sched_pressure) Init(0) Optimization | |
2442 | Enable register pressure sensitive insn scheduling. | |
2443 | ||
2444 | fsched-spec | |
2445 | Common Var(flag_schedule_speculative) Init(1) Optimization | |
2446 | Allow speculative motion of non-loads. | |
2447 | ||
2448 | fsched-spec-load | |
2449 | Common Var(flag_schedule_speculative_load) Optimization | |
2450 | Allow speculative motion of some loads. | |
2451 | ||
2452 | fsched-spec-load-dangerous | |
2453 | Common Var(flag_schedule_speculative_load_dangerous) Optimization | |
2454 | Allow speculative motion of more loads. | |
2455 | ||
2456 | fsched-verbose= | |
2457 | Common RejectNegative Joined UInteger Var(sched_verbose_param) Init(1) | |
2458 | -fsched-verbose=<number> Set the verbosity level of the scheduler. | |
2459 | ||
2460 | fsched2-use-superblocks | |
2461 | Common Var(flag_sched2_use_superblocks) Optimization | |
2462 | If scheduling post reload, do superblock scheduling. | |
2463 | ||
2464 | fsched2-use-traces | |
2465 | Common Ignore | |
2466 | Does nothing. Preserved for backward compatibility. | |
2467 | ||
2468 | fschedule-insns | |
2469 | Common Var(flag_schedule_insns) Optimization | |
2470 | Reschedule instructions before register allocation. | |
2471 | ||
2472 | fschedule-insns2 | |
2473 | Common Var(flag_schedule_insns_after_reload) Optimization | |
2474 | Reschedule instructions after register allocation. | |
2475 | ||
2476 | ; This flag should be on when a target implements non-trivial | |
2477 | ; scheduling hooks, maybe saving some information for its own sake. | |
2478 | ; On IA64, for example, this is used for correct bundling. | |
2479 | fselective-scheduling | |
2480 | Common Var(flag_selective_scheduling) Optimization | |
2481 | Schedule instructions using selective scheduling algorithm. | |
2482 | ||
2483 | fselective-scheduling2 | |
2484 | Common Var(flag_selective_scheduling2) Optimization | |
2485 | Run selective scheduling after reload. | |
2486 | ||
2487 | fself-test= | |
2488 | Common Undocumented Joined Var(flag_self_test) | |
2489 | Run self-tests, using the given path to locate test files. | |
2490 | ||
2491 | fsel-sched-pipelining | |
2492 | Common Var(flag_sel_sched_pipelining) Init(0) Optimization | |
2493 | Perform software pipelining of inner loops during selective scheduling. | |
2494 | ||
2495 | fsel-sched-pipelining-outer-loops | |
2496 | Common Var(flag_sel_sched_pipelining_outer_loops) Init(0) Optimization | |
2497 | Perform software pipelining of outer loops during selective scheduling. | |
2498 | ||
2499 | fsel-sched-reschedule-pipelined | |
2500 | Common Var(flag_sel_sched_reschedule_pipelined) Init(0) Optimization | |
2501 | Reschedule pipelined regions without pipelining. | |
2502 | ||
2503 | fsemantic-interposition | |
2504 | Common Var(flag_semantic_interposition) Init(1) | |
2505 | Allow interposing function (or variables) by ones with different semantics (or initializer) respectively by dynamic linker. | |
2506 | ||
2507 | ; sched_stalled_insns means that insns can be moved prematurely from the queue | |
2508 | ; of stalled insns into the ready list. | |
2509 | fsched-stalled-insns | |
2510 | Common Var(flag_sched_stalled_insns) Optimization UInteger | |
2511 | Allow premature scheduling of queued insns. | |
2512 | ||
2513 | fsched-stalled-insns= | |
2514 | Common RejectNegative Joined UInteger Optimization | |
2515 | -fsched-stalled-insns=<number> Set number of queued insns that can be prematurely scheduled. | |
2516 | ||
2517 | ; sched_stalled_insns_dep controls how many recently scheduled cycles will | |
2518 | ; be examined for a dependency on a stalled insn that is candidate for | |
2519 | ; premature removal from the queue of stalled insns into the ready list (has | |
2520 | ; an effect only if the flag 'sched_stalled_insns' is set). | |
2521 | fsched-stalled-insns-dep | |
2522 | Common Var(flag_sched_stalled_insns_dep,1) Init(1) Optimization UInteger | |
2523 | Set dependence distance checking in premature scheduling of queued insns. | |
2524 | ||
2525 | fsched-stalled-insns-dep= | |
2526 | Common RejectNegative Joined UInteger Optimization | |
2527 | -fsched-stalled-insns-dep=<number> Set dependence distance checking in premature scheduling of queued insns. | |
2528 | ||
2529 | fsched-group-heuristic | |
2530 | Common Var(flag_sched_group_heuristic) Init(1) Optimization | |
2531 | Enable the group heuristic in the scheduler. | |
2532 | ||
2533 | fsched-critical-path-heuristic | |
2534 | Common Var(flag_sched_critical_path_heuristic) Init(1) Optimization | |
2535 | Enable the critical path heuristic in the scheduler. | |
2536 | ||
2537 | fsched-spec-insn-heuristic | |
2538 | Common Var(flag_sched_spec_insn_heuristic) Init(1) Optimization | |
2539 | Enable the speculative instruction heuristic in the scheduler. | |
2540 | ||
2541 | fsched-rank-heuristic | |
2542 | Common Var(flag_sched_rank_heuristic) Init(1) Optimization | |
2543 | Enable the rank heuristic in the scheduler. | |
2544 | ||
2545 | fsched-last-insn-heuristic | |
2546 | Common Var(flag_sched_last_insn_heuristic) Init(1) Optimization | |
2547 | Enable the last instruction heuristic in the scheduler. | |
2548 | ||
2549 | fsched-dep-count-heuristic | |
2550 | Common Var(flag_sched_dep_count_heuristic) Init(1) Optimization | |
2551 | Enable the dependent count heuristic in the scheduler. | |
2552 | ||
2553 | fsection-anchors | |
2554 | Common Var(flag_section_anchors) Optimization | |
2555 | Access data in the same section from shared anchor points. | |
2556 | ||
2557 | fsee | |
2558 | Common Ignore | |
2559 | Does nothing. Preserved for backward compatibility. | |
2560 | ||
2561 | fzee | |
2562 | Common Ignore | |
2563 | Does nothing. Preserved for backward compatibility. | |
2564 | ||
2565 | free | |
2566 | Common Var(flag_ree) Init(0) Optimization | |
2567 | Turn on Redundant Extensions Elimination pass. | |
2568 | ||
2569 | fshow-column | |
2570 | Common Var(flag_show_column) Init(1) | |
2571 | Show column numbers in diagnostics, when available. Default on. | |
2572 | ||
2573 | fshrink-wrap | |
2574 | Common Var(flag_shrink_wrap) Optimization | |
2575 | Emit function prologues only before parts of the function that need it, | |
2576 | rather than at the top of the function. | |
2577 | ||
2578 | fshrink-wrap-separate | |
2579 | Common Var(flag_shrink_wrap_separate) Init(1) Optimization | |
2580 | Shrink-wrap parts of the prologue and epilogue separately. | |
2581 | ||
2582 | fsignaling-nans | |
2583 | Common Var(flag_signaling_nans) Optimization SetByCombined | |
2584 | Disable optimizations observable by IEEE signaling NaNs. | |
2585 | ||
2586 | fsigned-zeros | |
2587 | Common Var(flag_signed_zeros) Init(1) Optimization SetByCombined | |
2588 | Disable floating point optimizations that ignore the IEEE signedness of zero. | |
2589 | ||
2590 | fsingle-precision-constant | |
2591 | Common Var(flag_single_precision_constant) Optimization | |
2592 | Convert floating point constants to single precision constants. | |
2593 | ||
2594 | fsplit-ivs-in-unroller | |
2595 | Common Var(flag_split_ivs_in_unroller) Init(1) Optimization | |
2596 | Split lifetimes of induction variables when loops are unrolled. | |
2597 | ||
2598 | fsplit-stack | |
2599 | Common Var(flag_split_stack) Init(-1) | |
2600 | Generate discontiguous stack frames. | |
2601 | ||
2602 | fsplit-wide-types | |
2603 | Common Var(flag_split_wide_types) Optimization | |
2604 | Split wide types into independent registers. | |
2605 | ||
2606 | fsplit-wide-types-early | |
2607 | Common Var(flag_split_wide_types_early) Optimization | |
2608 | Split wide types into independent registers earlier. | |
2609 | ||
2610 | fssa-backprop | |
2611 | Common Var(flag_ssa_backprop) Init(1) Optimization | |
2612 | Enable backward propagation of use properties at the SSA level. | |
2613 | ||
2614 | fssa-phiopt | |
2615 | Common Var(flag_ssa_phiopt) Optimization | |
2616 | Optimize conditional patterns using SSA PHI nodes. | |
2617 | ||
2618 | fstdarg-opt | |
2619 | Common Var(flag_stdarg_opt) Init(1) Optimization | |
2620 | Optimize amount of stdarg registers saved to stack at start of function. | |
2621 | ||
2622 | fvariable-expansion-in-unroller | |
2623 | Common Var(flag_variable_expansion_in_unroller) Optimization | |
2624 | Apply variable expansion when loops are unrolled. | |
2625 | ||
2626 | fstack-check= | |
2627 | Common RejectNegative Joined Optimization | |
2628 | -fstack-check=[no|generic|specific] Insert stack checking code into the program. | |
2629 | ||
2630 | fstack-check | |
2631 | Common Alias(fstack-check=, specific, no) | |
2632 | Insert stack checking code into the program. Same as -fstack-check=specific. | |
2633 | ||
2634 | fstack-clash-protection | |
2635 | Common Var(flag_stack_clash_protection) Optimization | |
2636 | Insert code to probe each page of stack space as it is allocated to protect | |
2637 | from stack-clash style attacks. | |
2638 | ||
2639 | fstack-limit | |
2640 | Common Var(common_deferred_options) Defer | |
2641 | ||
2642 | fstack-limit-register= | |
2643 | Common RejectNegative Joined Var(common_deferred_options) Defer | |
2644 | -fstack-limit-register=<register> Trap if the stack goes past <register>. | |
2645 | ||
2646 | fstack-limit-symbol= | |
2647 | Common RejectNegative Joined Var(common_deferred_options) Defer | |
2648 | -fstack-limit-symbol=<name> Trap if the stack goes past symbol <name>. | |
2649 | ||
2650 | fstack-protector | |
2651 | Common Var(flag_stack_protect, 1) Init(-1) Optimization | |
2652 | Use propolice as a stack protection method. | |
2653 | ||
2654 | fstack-protector-all | |
2655 | Common RejectNegative Var(flag_stack_protect, 2) Init(-1) Optimization | |
2656 | Use a stack protection method for every function. | |
2657 | ||
2658 | fstack-protector-strong | |
2659 | Common RejectNegative Var(flag_stack_protect, 3) Init(-1) Optimization | |
2660 | Use a smart stack protection method for certain functions. | |
2661 | ||
2662 | fstack-protector-explicit | |
2663 | Common RejectNegative Var(flag_stack_protect, 4) Optimization | |
2664 | Use stack protection method only for functions with the stack_protect attribute. | |
2665 | ||
2666 | fstack-usage | |
2667 | Common RejectNegative Var(flag_stack_usage) | |
2668 | Output stack usage information on a per-function basis. | |
2669 | ||
2670 | fstrength-reduce | |
2671 | Common Ignore | |
2672 | Does nothing. Preserved for backward compatibility. | |
2673 | ||
2674 | ; Nonzero if we should do (language-dependent) alias analysis. | |
2675 | ; Typically, this analysis will assume that expressions of certain | |
2676 | ; types do not alias expressions of certain other types. Only used | |
2677 | ; if alias analysis (in general) is enabled. | |
2678 | fstrict-aliasing | |
2679 | Common Var(flag_strict_aliasing) Optimization | |
2680 | Assume strict aliasing rules apply. | |
2681 | ||
2682 | fstrict-overflow | |
2683 | Common | |
2684 | Treat signed overflow as undefined. Negated as -fwrapv -fwrapv-pointer. | |
2685 | ||
2686 | fsync-libcalls | |
2687 | Common Var(flag_sync_libcalls) Init(1) | |
2688 | Implement __atomic operations via libcalls to legacy __sync functions. | |
2689 | ||
2690 | fsyntax-only | |
2691 | Common Var(flag_syntax_only) | |
2692 | Check for syntax errors, then stop. | |
2693 | ||
2694 | ftest-coverage | |
2695 | Common Var(flag_test_coverage) | |
2696 | Create data files needed by \"gcov\". | |
2697 | ||
2698 | fthread-jumps | |
2699 | Common Var(flag_thread_jumps) Optimization | |
2700 | Perform jump threading optimizations. | |
2701 | ||
2702 | ftime-report | |
2703 | Common Var(time_report) | |
2704 | Report the time taken by each compiler pass. | |
2705 | ||
2706 | ftime-report-details | |
2707 | Common Var(time_report_details) | |
2708 | Record times taken by sub-phases separately. | |
2709 | ||
2710 | ftls-model= | |
2711 | Common Joined RejectNegative Enum(tls_model) Var(flag_tls_default) Init(TLS_MODEL_GLOBAL_DYNAMIC) | |
2712 | -ftls-model=[global-dynamic|local-dynamic|initial-exec|local-exec] Set the default thread-local storage code generation model. | |
2713 | ||
2714 | Enum | |
2715 | Name(tls_model) Type(enum tls_model) UnknownError(unknown TLS model %qs) | |
2716 | ||
2717 | EnumValue | |
2718 | Enum(tls_model) String(global-dynamic) Value(TLS_MODEL_GLOBAL_DYNAMIC) | |
2719 | ||
2720 | EnumValue | |
2721 | Enum(tls_model) String(local-dynamic) Value(TLS_MODEL_LOCAL_DYNAMIC) | |
2722 | ||
2723 | EnumValue | |
2724 | Enum(tls_model) String(initial-exec) Value(TLS_MODEL_INITIAL_EXEC) | |
2725 | ||
2726 | EnumValue | |
2727 | Enum(tls_model) String(local-exec) Value(TLS_MODEL_LOCAL_EXEC) | |
2728 | ||
2729 | ftoplevel-reorder | |
2730 | Common Var(flag_toplevel_reorder) Init(2) Optimization | |
2731 | Reorder top level functions, variables, and asms. | |
2732 | ||
2733 | ftracer | |
2734 | Common Var(flag_tracer) Optimization | |
2735 | Perform superblock formation via tail duplication. | |
2736 | ||
2737 | ftrampolines | |
2738 | Common Var(flag_trampolines) Init(0) | |
2739 | For targets that normally need trampolines for nested functions, always | |
2740 | generate them instead of using descriptors. | |
2741 | ||
2742 | ; Zero means that floating-point math operations cannot generate a | |
2743 | ; (user-visible) trap. This is the case, for example, in nonstop | |
2744 | ; IEEE 754 arithmetic. | |
2745 | ftrapping-math | |
2746 | Common Var(flag_trapping_math) Init(1) Optimization SetByCombined | |
2747 | Assume floating-point operations can trap. | |
2748 | ||
2749 | ftrapv | |
2750 | Common Var(flag_trapv) Optimization | |
2751 | Trap for signed overflow in addition, subtraction and multiplication. | |
2752 | ||
2753 | ftree-ccp | |
2754 | Common Var(flag_tree_ccp) Optimization | |
2755 | Enable SSA-CCP optimization on trees. | |
2756 | ||
2757 | ftree-bit-ccp | |
2758 | Common Var(flag_tree_bit_ccp) Optimization | |
2759 | Enable SSA-BIT-CCP optimization on trees. | |
2760 | ||
2761 | ftree-store-ccp | |
2762 | Common Ignore | |
2763 | Does nothing. Preserved for backward compatibility. | |
2764 | ||
2765 | ftree-ch | |
2766 | Common Var(flag_tree_ch) Optimization | |
2767 | Enable loop header copying on trees. | |
2768 | ||
2769 | ftree-coalesce-inlined-vars | |
2770 | Common Ignore RejectNegative | |
2771 | Does nothing. Preserved for backward compatibility. | |
2772 | ||
2773 | ftree-coalesce-vars | |
2774 | Common Var(flag_tree_coalesce_vars) Optimization | |
2775 | Enable SSA coalescing of user variables. | |
2776 | ||
2777 | ftree-copyrename | |
2778 | Common Ignore | |
2779 | Does nothing. Preserved for backward compatibility. | |
2780 | ||
2781 | ftree-copy-prop | |
2782 | Common Var(flag_tree_copy_prop) Optimization | |
2783 | Enable copy propagation on trees. | |
2784 | ||
2785 | ftree-store-copy-prop | |
2786 | Common Ignore | |
2787 | Does nothing. Preserved for backward compatibility. | |
2788 | ||
2789 | ftree-cselim | |
2790 | Common Var(flag_tree_cselim) Init(2) Optimization | |
2791 | Transform condition stores into unconditional ones. | |
2792 | ||
2793 | ftree-switch-conversion | |
2794 | Common Var(flag_tree_switch_conversion) Optimization | |
2795 | Perform conversions of switch initializations. | |
2796 | ||
2797 | ftree-dce | |
2798 | Common Var(flag_tree_dce) Optimization | |
2799 | Enable SSA dead code elimination optimization on trees. | |
2800 | ||
2801 | ftree-dominator-opts | |
2802 | Common Var(flag_tree_dom) Optimization | |
2803 | Enable dominator optimizations. | |
2804 | ||
2805 | ftree-tail-merge | |
2806 | Common Var(flag_tree_tail_merge) Optimization | |
2807 | Enable tail merging on trees. | |
2808 | ||
2809 | ftree-dse | |
2810 | Common Var(flag_tree_dse) Optimization | |
2811 | Enable dead store elimination. | |
2812 | ||
2813 | ftree-forwprop | |
2814 | Common Var(flag_tree_forwprop) Init(1) Optimization | |
2815 | Enable forward propagation on trees. | |
2816 | ||
2817 | ftree-fre | |
2818 | Common Var(flag_tree_fre) Optimization | |
2819 | Enable Full Redundancy Elimination (FRE) on trees. | |
2820 | ||
2821 | foptimize-strlen | |
2822 | Common Var(flag_optimize_strlen) Optimization | |
2823 | Enable string length optimizations on trees. | |
2824 | ||
2825 | fisolate-erroneous-paths-dereference | |
2826 | Common Var(flag_isolate_erroneous_paths_dereference) Optimization | |
2827 | Detect paths that trigger erroneous or undefined behavior due to | |
2828 | dereferencing a null pointer. Isolate those paths from the main control | |
2829 | flow and turn the statement with erroneous or undefined behavior into a trap. | |
2830 | ||
2831 | fisolate-erroneous-paths-attribute | |
2832 | Common Var(flag_isolate_erroneous_paths_attribute) Optimization | |
2833 | Detect paths that trigger erroneous or undefined behavior due to a null value | |
2834 | being used in a way forbidden by a returns_nonnull or nonnull | |
2835 | attribute. Isolate those paths from the main control flow and turn the | |
2836 | statement with erroneous or undefined behavior into a trap. | |
2837 | ||
2838 | ftree-loop-distribution | |
2839 | Common Var(flag_tree_loop_distribution) Optimization | |
2840 | Enable loop distribution on trees. | |
2841 | ||
2842 | ftree-loop-distribute-patterns | |
2843 | Common Var(flag_tree_loop_distribute_patterns) Optimization | |
2844 | Enable loop distribution for patterns transformed into a library call. | |
2845 | ||
2846 | ftree-loop-im | |
2847 | Common Var(flag_tree_loop_im) Init(1) Optimization | |
2848 | Enable loop invariant motion on trees. | |
2849 | ||
2850 | ftree-loop-linear | |
2851 | Common Alias(floop-nest-optimize) | |
2852 | Enable loop nest transforms. Same as -floop-nest-optimize. | |
2853 | ||
2854 | ftree-loop-ivcanon | |
2855 | Common Var(flag_tree_loop_ivcanon) Init(1) Optimization | |
2856 | Create canonical induction variables in loops. | |
2857 | ||
2858 | ftree-loop-optimize | |
2859 | Common Var(flag_tree_loop_optimize) Init(1) Optimization | |
2860 | Enable loop optimizations on tree level. | |
2861 | ||
2862 | ftree-parallelize-loops= | |
2863 | Common Joined RejectNegative UInteger Var(flag_tree_parallelize_loops) Init(1) Optimization | |
2864 | -ftree-parallelize-loops=<number> Enable automatic parallelization of loops. | |
2865 | ||
2866 | ftree-phiprop | |
2867 | Common Var(flag_tree_phiprop) Init(1) Optimization | |
2868 | Enable hoisting loads from conditional pointers. | |
2869 | ||
2870 | ftree-pre | |
2871 | Common Var(flag_tree_pre) Optimization | |
2872 | Enable SSA-PRE optimization on trees. | |
2873 | ||
2874 | ftree-partial-pre | |
2875 | Common Var(flag_tree_partial_pre) Optimization | |
2876 | In SSA-PRE optimization on trees, enable partial-partial redundancy elimination. | |
2877 | ||
2878 | ftree-pta | |
2879 | Common Var(flag_tree_pta) Optimization | |
2880 | Perform function-local points-to analysis on trees. | |
2881 | ||
2882 | ftree-reassoc | |
2883 | Common Var(flag_tree_reassoc) Init(1) Optimization | |
2884 | Enable reassociation on tree level. | |
2885 | ||
2886 | ftree-salias | |
2887 | Common Ignore | |
2888 | Does nothing. Preserved for backward compatibility. | |
2889 | ||
2890 | ftree-sink | |
2891 | Common Var(flag_tree_sink) Optimization | |
2892 | Enable SSA code sinking on trees. | |
2893 | ||
2894 | ftree-slsr | |
2895 | Common Var(flag_tree_slsr) Optimization | |
2896 | Perform straight-line strength reduction. | |
2897 | ||
2898 | ftree-sra | |
2899 | Common Var(flag_tree_sra) Optimization | |
2900 | Perform scalar replacement of aggregates. | |
2901 | ||
2902 | ftree-ter | |
2903 | Common Var(flag_tree_ter) Optimization | |
2904 | Replace temporary expressions in the SSA->normal pass. | |
2905 | ||
2906 | ftree-lrs | |
2907 | Common Var(flag_tree_live_range_split) Optimization | |
2908 | Perform live range splitting during the SSA->normal pass. | |
2909 | ||
2910 | ftree-vrp | |
2911 | Common Var(flag_tree_vrp) Init(0) Optimization | |
2912 | Perform Value Range Propagation on trees. | |
2913 | ||
2914 | fsplit-paths | |
2915 | Common Var(flag_split_paths) Init(0) Optimization | |
2916 | Split paths leading to loop backedges. | |
2917 | ||
2918 | funconstrained-commons | |
2919 | Common Var(flag_unconstrained_commons) Optimization | |
2920 | Assume common declarations may be overridden with ones with a larger | |
2921 | trailing array. | |
2922 | ||
2923 | funit-at-a-time | |
2924 | Common Var(flag_unit_at_a_time) Init(1) | |
2925 | Compile whole compilation unit at a time. | |
2926 | ||
2927 | funroll-loops | |
2928 | Common Var(flag_unroll_loops) Optimization | |
2929 | Perform loop unrolling when iteration count is known. | |
2930 | ||
2931 | funroll-all-loops | |
2932 | Common Var(flag_unroll_all_loops) Optimization | |
2933 | Perform loop unrolling for all loops. | |
2934 | ||
2935 | funroll-completely-grow-size | |
2936 | Undocumented Var(flag_cunroll_grow_size) Optimization | |
2937 | ; Internal undocumented flag, allow size growth during complete unrolling | |
2938 | ||
2939 | ; Nonzero means that loop optimizer may assume that the induction variables | |
2940 | ; that control loops do not overflow and that the loops with nontrivial | |
2941 | ; exit condition are not infinite | |
2942 | funsafe-loop-optimizations | |
2943 | Common Ignore | |
2944 | Does nothing. Preserved for backward compatibility. | |
2945 | ||
2946 | fassociative-math | |
2947 | Common Var(flag_associative_math) SetByCombined Optimization | |
2948 | Allow optimization for floating-point arithmetic which may change the | |
2949 | result of the operation due to rounding. | |
2950 | ||
2951 | freciprocal-math | |
2952 | Common Var(flag_reciprocal_math) SetByCombined Optimization | |
2953 | Same as -fassociative-math for expressions which include division. | |
2954 | ||
2955 | ; Nonzero means that unsafe floating-point math optimizations are allowed | |
2956 | ; for the sake of speed. IEEE compliance is not guaranteed, and operations | |
2957 | ; are allowed to assume that their arguments and results are "normal" | |
2958 | ; (e.g., nonnegative for SQRT). | |
2959 | funsafe-math-optimizations | |
2960 | Common Var(flag_unsafe_math_optimizations) Optimization SetByCombined | |
2961 | Allow math optimizations that may violate IEEE or ISO standards. | |
2962 | ||
2963 | funswitch-loops | |
2964 | Common Var(flag_unswitch_loops) Optimization | |
2965 | Perform loop unswitching. | |
2966 | ||
2967 | fsplit-loops | |
2968 | Common Var(flag_split_loops) Optimization | |
2969 | Perform loop splitting. | |
2970 | ||
2971 | fversion-loops-for-strides | |
2972 | Common Var(flag_version_loops_for_strides) Optimization | |
2973 | Version loops based on whether indices have a stride of one. | |
2974 | ||
2975 | funwind-tables | |
2976 | Common Var(flag_unwind_tables) Optimization | |
2977 | Just generate unwind tables for exception handling. | |
2978 | ||
2979 | fuse-ld=bfd | |
2980 | Common Driver Negative(fuse-ld=gold) | |
2981 | Use the bfd linker instead of the default linker. | |
2982 | ||
2983 | fuse-ld=gold | |
2984 | Common Driver Negative(fuse-ld=bfd) | |
2985 | Use the gold linker instead of the default linker. | |
2986 | ||
2987 | fuse-ld=lld | |
2988 | Common Driver Negative(fuse-ld=lld) | |
2989 | Use the lld LLVM linker instead of the default linker. | |
2990 | ||
2991 | fuse-linker-plugin | |
2992 | Common Undocumented Var(flag_use_linker_plugin) | |
2993 | ||
2994 | ; Positive if we should track variables, negative if we should run | |
2995 | ; the var-tracking pass only to discard debug annotations, zero if | |
2996 | ; we're not to run it. When flag_var_tracking == 2 (AUTODETECT_VALUE) it | |
2997 | ; will be set according to optimize, debug_info_level and debug_hooks | |
2998 | ; in process_options (). | |
2999 | fvar-tracking | |
3000 | Common Var(flag_var_tracking) Init(2) PerFunction | |
3001 | Perform variable tracking. | |
3002 | ||
3003 | ; Positive if we should track variables at assignments, negative if | |
3004 | ; we should run the var-tracking pass only to discard debug | |
3005 | ; annotations. When flag_var_tracking_assignments == | |
3006 | ; AUTODETECT_VALUE it will be set according to flag_var_tracking. | |
3007 | fvar-tracking-assignments | |
3008 | Common Var(flag_var_tracking_assignments) Init(2) PerFunction | |
3009 | Perform variable tracking by annotating assignments. | |
3010 | ||
3011 | ; Nonzero if we should toggle flag_var_tracking_assignments after | |
3012 | ; processing options and computing its default. */ | |
3013 | fvar-tracking-assignments-toggle | |
3014 | Common Var(flag_var_tracking_assignments_toggle) PerFunction | |
3015 | Toggle -fvar-tracking-assignments. | |
3016 | ||
3017 | ; Positive if we should track uninitialized variables, negative if | |
3018 | ; we should run the var-tracking pass only to discard debug | |
3019 | ; annotations. When flag_var_tracking_uninit == AUTODETECT_VALUE it | |
3020 | ; will be set according to flag_var_tracking. | |
3021 | fvar-tracking-uninit | |
3022 | Common Var(flag_var_tracking_uninit) PerFunction | |
3023 | Perform variable tracking and also tag variables that are uninitialized. | |
3024 | ||
3025 | ; Alias to enable both -ftree-loop-vectorize and -ftree-slp-vectorize. | |
3026 | ftree-vectorize | |
3027 | Common Optimization | |
3028 | Enable vectorization on trees. | |
3029 | ||
3030 | ftree-vectorizer-verbose= | |
3031 | Common Joined RejectNegative Ignore | |
3032 | Does nothing. Preserved for backward compatibility. | |
3033 | ||
3034 | ftree-loop-vectorize | |
3035 | Common Var(flag_tree_loop_vectorize) Optimization EnabledBy(ftree-vectorize) | |
3036 | Enable loop vectorization on trees. | |
3037 | ||
3038 | ftree-slp-vectorize | |
3039 | Common Var(flag_tree_slp_vectorize) Optimization EnabledBy(ftree-vectorize) | |
3040 | Enable basic block vectorization (SLP) on trees. | |
3041 | ||
3042 | fvect-cost-model= | |
3043 | Common Joined RejectNegative Enum(vect_cost_model) Var(flag_vect_cost_model) Init(VECT_COST_MODEL_DEFAULT) Optimization | |
3044 | -fvect-cost-model=[unlimited|dynamic|cheap|very-cheap] Specifies the cost model for vectorization. | |
3045 | ||
3046 | fsimd-cost-model= | |
3047 | Common Joined RejectNegative Enum(vect_cost_model) Var(flag_simd_cost_model) Init(VECT_COST_MODEL_UNLIMITED) Optimization | |
3048 | -fsimd-cost-model=[unlimited|dynamic|cheap|very-cheap] Specifies the vectorization cost model for code marked with a simd directive. | |
3049 | ||
3050 | Enum | |
3051 | Name(vect_cost_model) Type(enum vect_cost_model) UnknownError(unknown vectorizer cost model %qs) | |
3052 | ||
3053 | EnumValue | |
3054 | Enum(vect_cost_model) String(unlimited) Value(VECT_COST_MODEL_UNLIMITED) | |
3055 | ||
3056 | EnumValue | |
3057 | Enum(vect_cost_model) String(dynamic) Value(VECT_COST_MODEL_DYNAMIC) | |
3058 | ||
3059 | EnumValue | |
3060 | Enum(vect_cost_model) String(cheap) Value(VECT_COST_MODEL_CHEAP) | |
3061 | ||
3062 | EnumValue | |
3063 | Enum(vect_cost_model) String(very-cheap) Value(VECT_COST_MODEL_VERY_CHEAP) | |
3064 | ||
3065 | fvect-cost-model | |
3066 | Common Alias(fvect-cost-model=,dynamic,unlimited) | |
3067 | Enables the dynamic vectorizer cost model. Preserved for backward compatibility. | |
3068 | ||
3069 | ftree-vect-loop-version | |
3070 | Common Ignore | |
3071 | Does nothing. Preserved for backward compatibility. | |
3072 | ||
3073 | ftree-scev-cprop | |
3074 | Common Var(flag_tree_scev_cprop) Init(1) Optimization | |
3075 | Enable copy propagation of scalar-evolution information. | |
3076 | ||
3077 | ; -fverbose-asm causes extra commentary information to be produced in | |
3078 | ; the generated assembly code (to make it more readable). This option | |
3079 | ; is generally only of use to those who actually need to read the | |
3080 | ; generated assembly code (perhaps while debugging the compiler itself). | |
3081 | ; -fno-verbose-asm, the default, causes the extra information | |
3082 | ; to not be added and is useful when comparing two assembler files. | |
3083 | fverbose-asm | |
3084 | Common Var(flag_verbose_asm) | |
3085 | Add extra commentary to assembler output. | |
3086 | ||
3087 | fvisibility= | |
3088 | Common Joined RejectNegative Enum(symbol_visibility) Var(default_visibility) Init(VISIBILITY_DEFAULT) | |
3089 | -fvisibility=[default|internal|hidden|protected] Set the default symbol visibility. | |
3090 | ||
3091 | Enum | |
3092 | Name(symbol_visibility) Type(enum symbol_visibility) UnknownError(unrecognized visibility value %qs) | |
3093 | ||
3094 | EnumValue | |
3095 | Enum(symbol_visibility) String(default) Value(VISIBILITY_DEFAULT) | |
3096 | ||
3097 | EnumValue | |
3098 | Enum(symbol_visibility) String(internal) Value(VISIBILITY_INTERNAL) | |
3099 | ||
3100 | EnumValue | |
3101 | Enum(symbol_visibility) String(hidden) Value(VISIBILITY_HIDDEN) | |
3102 | ||
3103 | EnumValue | |
3104 | Enum(symbol_visibility) String(protected) Value(VISIBILITY_PROTECTED) | |
3105 | ||
3106 | fvtable-verify= | |
3107 | Common Joined RejectNegative Enum(vtv_priority) Var(flag_vtable_verify) Init(VTV_NO_PRIORITY) | |
3108 | Validate vtable pointers before using them. | |
3109 | ||
3110 | Enum | |
3111 | Name(vtv_priority) Type(enum vtv_priority) UnknownError(unknown vtable verify initialization priority %qs) | |
3112 | ||
3113 | EnumValue | |
3114 | Enum(vtv_priority) String(none) Value(VTV_NO_PRIORITY) | |
3115 | ||
3116 | EnumValue | |
3117 | Enum(vtv_priority) String(std) Value(VTV_STANDARD_PRIORITY) | |
3118 | ||
3119 | EnumValue | |
3120 | Enum(vtv_priority) String(preinit) Value(VTV_PREINIT_PRIORITY) | |
3121 | ||
3122 | fvtv-counts | |
3123 | Common Var(flag_vtv_counts) | |
3124 | Output vtable verification counters. | |
3125 | ||
3126 | fvtv-debug | |
3127 | Common Var(flag_vtv_debug) | |
3128 | Output vtable verification pointer sets information. | |
3129 | ||
3130 | fvpt | |
3131 | Common Var(flag_value_profile_transformations) Optimization | |
3132 | Use expression value profiles in optimizations. | |
3133 | ||
3134 | fweb | |
3135 | Common Var(flag_web) Init(2) Optimization | |
3136 | Construct webs and split unrelated uses of single variable. | |
3137 | ||
3138 | ftree-builtin-call-dce | |
3139 | Common Var(flag_tree_builtin_call_dce) Init(0) Optimization | |
3140 | Enable conditional dead code elimination for builtin calls. | |
3141 | ||
3142 | fwhole-program | |
3143 | Common Var(flag_whole_program) Init(0) | |
3144 | Perform whole program optimizations. | |
3145 | ||
3146 | fwrapv-pointer | |
3147 | Common Var(flag_wrapv_pointer) Optimization | |
3148 | Assume pointer overflow wraps around. | |
3149 | ||
3150 | fwrapv | |
3151 | Common Var(flag_wrapv) Optimization | |
3152 | Assume signed arithmetic overflow wraps around. | |
3153 | ||
3154 | fzero-initialized-in-bss | |
3155 | Common Var(flag_zero_initialized_in_bss) Init(1) | |
3156 | Put zero initialized data in the bss section. | |
3157 | ||
3158 | fzero-call-used-regs= | |
3159 | Common RejectNegative Joined | |
3160 | Clear call-used registers upon function return. | |
3161 | ||
3162 | g | |
3163 | Common Driver RejectNegative JoinedOrMissing | |
3164 | Generate debug information in default format. | |
3165 | ||
3166 | gas-loc-support | |
3167 | Common Driver Var(dwarf2out_as_loc_support) Init(2) | |
3168 | Assume assembler support for (DWARF2+) .loc directives. | |
3169 | ||
3170 | gas-locview-support | |
3171 | Common Driver Var(dwarf2out_as_locview_support) Init(2) | |
3172 | Assume assembler support for view in (DWARF2+) .loc directives. | |
3173 | ||
3174 | gcoff | |
3175 | Common Driver WarnRemoved | |
3176 | Does nothing. Preserved for backward compatibility. | |
3177 | ||
3178 | gcoff1 | |
3179 | Common Driver WarnRemoved | |
3180 | Does nothing. Preserved for backward compatibility. | |
3181 | ||
3182 | gcoff2 | |
3183 | Common Driver WarnRemoved | |
3184 | Does nothing. Preserved for backward compatibility. | |
3185 | ||
3186 | gcoff3 | |
3187 | Common Driver WarnRemoved | |
3188 | Does nothing. Preserved for backward compatibility. | |
3189 | ||
3190 | gcolumn-info | |
3191 | Common Driver Var(debug_column_info,1) Init(1) | |
3192 | Record DW_AT_decl_column and DW_AT_call_column in DWARF. | |
3193 | ||
3194 | ; The CTF generation process feeds off DWARF dies. This option implicitly | |
3195 | ; updates the debug_info_level to DINFO_LEVEL_NORMAL. | |
3196 | gctf | |
3197 | Common Driver RejectNegative JoinedOrMissing | |
3198 | Generate CTF debug information at default level. | |
3199 | ||
3200 | gbtf | |
3201 | Common Driver RejectNegative JoinedOrMissing | |
3202 | Generate BTF debug information at default level. | |
3203 | ||
3204 | gdwarf | |
3205 | Common Driver JoinedOrMissing Negative(gdwarf-) | |
3206 | Generate debug information in default version of DWARF format. | |
3207 | ||
3208 | gdwarf- | |
3209 | Common Driver Joined UInteger Var(dwarf_version) Init(5) Negative(gstabs) | |
3210 | Generate debug information in DWARF v2 (or later) format. | |
3211 | ||
3212 | gdwarf32 | |
3213 | Common Driver Var(dwarf_offset_size,4) Init(4) RejectNegative | |
3214 | Use 32-bit DWARF format when emitting DWARF debug information. | |
3215 | ||
3216 | gdwarf64 | |
3217 | Common Driver Var(dwarf_offset_size,8) RejectNegative | |
3218 | Use 64-bit DWARF format when emitting DWARF debug information. | |
3219 | ||
3220 | ggdb | |
3221 | Common Driver JoinedOrMissing | |
3222 | Generate debug information in default extended format. | |
3223 | ||
3224 | ginline-points | |
3225 | Common Driver Var(debug_inline_points) Init(2) | |
3226 | Generate extended entry point information for inlined functions. | |
3227 | ||
3228 | ginternal-reset-location-views | |
3229 | Common Driver Var(debug_internal_reset_location_views) Init(2) | |
3230 | Compute locview reset points based on insn length estimates. | |
3231 | ||
3232 | gno- | |
3233 | RejectNegative Joined Undocumented | |
3234 | ; Catch the gno- prefix, so it doesn't backtrack to g<level>. | |
3235 | ||
3236 | gno-pubnames | |
3237 | Common Driver Negative(gpubnames) Var(debug_generate_pub_sections, 0) Init(-1) | |
3238 | Don't generate DWARF pubnames and pubtypes sections. | |
3239 | ||
3240 | gpubnames | |
3241 | Common Driver Negative(ggnu-pubnames) Var(debug_generate_pub_sections, 1) | |
3242 | Generate DWARF pubnames and pubtypes sections. | |
3243 | ||
3244 | ggnu-pubnames | |
3245 | Common Driver Negative(gno-pubnames) Var(debug_generate_pub_sections, 2) | |
3246 | Generate DWARF pubnames and pubtypes sections with GNU extensions. | |
3247 | ||
3248 | grecord-gcc-switches | |
3249 | Common Driver Var(dwarf_record_gcc_switches) Init(1) | |
3250 | Record gcc command line switches in DWARF DW_AT_producer. | |
3251 | ||
3252 | gsplit-dwarf | |
3253 | Common Driver Var(dwarf_split_debug_info) Init(0) | |
3254 | Generate debug information in separate .dwo files. | |
3255 | ||
3256 | gstabs | |
3257 | Common Driver JoinedOrMissing Negative(gstabs+) | |
3258 | Generate debug information in STABS format. | |
3259 | ||
3260 | gstabs+ | |
3261 | Common Driver JoinedOrMissing Negative(gvms) | |
3262 | Generate debug information in extended STABS format. | |
3263 | ||
3264 | gstatement-frontiers | |
3265 | Common Driver Var(debug_nonbind_markers_p) Init(2) | |
3266 | Emit progressive recommended breakpoint locations. | |
3267 | ||
3268 | gstrict-dwarf | |
3269 | Common Driver Var(dwarf_strict) Init(0) | |
3270 | Don't emit DWARF additions beyond selected version. | |
3271 | ||
3272 | gdescribe-dies | |
3273 | Common Driver Var(flag_describe_dies) Init(0) | |
3274 | Add description attributes to some DWARF DIEs that have no name attribute. | |
3275 | ||
3276 | gtoggle | |
3277 | Common Driver Var(flag_gtoggle) | |
3278 | Toggle debug information generation. | |
3279 | ||
3280 | gvariable-location-views | |
3281 | Common Driver Var(debug_variable_location_views, 1) Init(2) | |
3282 | Augment variable location lists with progressive views. | |
3283 | ||
3284 | gvariable-location-views=incompat5 | |
3285 | Common Driver RejectNegative Var(debug_variable_location_views, -1) Init(2) | |
3286 | ||
3287 | gvms | |
3288 | Common Driver JoinedOrMissing Negative(gxcoff) | |
3289 | Generate debug information in VMS format. | |
3290 | ||
3291 | gxcoff | |
3292 | Common Driver JoinedOrMissing Negative(gxcoff+) | |
3293 | Generate debug information in XCOFF format. | |
3294 | ||
3295 | gxcoff+ | |
3296 | Common Driver JoinedOrMissing Negative(gdwarf) | |
3297 | Generate debug information in extended XCOFF format. | |
3298 | ||
3299 | Enum | |
3300 | Name(compressed_debug_sections) Type(int) | |
3301 | ||
3302 | ; Since -gz= is completely handled in specs, the values aren't used and we | |
3303 | ; assign arbitrary constants. | |
3304 | EnumValue | |
3305 | Enum(compressed_debug_sections) String(none) Value(0) | |
3306 | ||
3307 | EnumValue | |
3308 | Enum(compressed_debug_sections) String(zlib) Value(1) | |
3309 | ||
3310 | EnumValue | |
3311 | Enum(compressed_debug_sections) String(zlib-gnu) Value(2) | |
3312 | ||
3313 | gz | |
3314 | Common Driver | |
3315 | Generate compressed debug sections. | |
3316 | ||
3317 | gz= | |
3318 | Common Driver RejectNegative Joined Enum(compressed_debug_sections) | |
3319 | -gz=<format> Generate compressed debug sections in format <format>. | |
3320 | ||
3321 | h | |
3322 | Driver Joined Separate | |
3323 | ||
3324 | iplugindir= | |
3325 | Common Joined Var(plugindir_string) Init(0) | |
3326 | -iplugindir=<dir> Set <dir> to be the default plugin directory. | |
3327 | ||
3328 | imultiarch | |
3329 | Common Joined Separate RejectDriver Var(imultiarch) Init(0) | |
3330 | -imultiarch <dir> Set <dir> to be the multiarch include subdirectory. | |
3331 | ||
3332 | l | |
3333 | Driver Joined Separate | |
3334 | ||
3335 | n | |
3336 | Driver | |
3337 | ||
3338 | no-canonical-prefixes | |
3339 | Driver | |
3340 | ||
3341 | nodefaultlibs | |
3342 | Driver | |
3343 | ||
3344 | nostartfiles | |
3345 | Driver | |
3346 | ||
3347 | nolibc | |
3348 | Driver | |
3349 | ||
3350 | nostdlib | |
3351 | Driver | |
3352 | ||
3353 | o | |
3354 | Common Driver Joined Separate Var(asm_file_name) MissingArgError(missing filename after %qs) | |
3355 | -o <file> Place output into <file>. | |
3356 | ||
3357 | p | |
3358 | Common Var(profile_flag) | |
3359 | Enable function profiling. | |
3360 | ||
3361 | pass-exit-codes | |
3362 | Driver Var(pass_exit_codes) | |
3363 | ||
3364 | pedantic | |
3365 | Common Alias(Wpedantic) | |
3366 | ||
3367 | pedantic-errors | |
3368 | Common Var(flag_pedantic_errors) | |
3369 | Like -pedantic but issue them as errors. | |
3370 | ||
3371 | pg | |
3372 | Driver | |
3373 | ||
3374 | pipe | |
3375 | Driver Var(use_pipes) | |
3376 | ||
3377 | print-file-name= | |
3378 | Driver JoinedOrMissing Var(print_file_name) | |
3379 | ||
3380 | print-libgcc-file-name | |
3381 | Driver | |
3382 | ||
3383 | print-multi-directory | |
3384 | Driver Var(print_multi_directory) | |
3385 | ||
3386 | print-multi-lib | |
3387 | Driver Var(print_multi_lib) | |
3388 | ||
3389 | print-multi-os-directory | |
3390 | Driver Var(print_multi_os_directory) | |
3391 | ||
3392 | print-multiarch | |
3393 | Driver Var(print_multiarch) | |
3394 | ||
3395 | print-prog-name= | |
3396 | Driver JoinedOrMissing Var(print_prog_name) | |
3397 | ||
3398 | print-search-dirs | |
3399 | Driver Var(print_search_dirs) | |
3400 | ||
3401 | print-sysroot | |
3402 | Driver Var(print_sysroot) | |
3403 | ||
3404 | print-sysroot-headers-suffix | |
3405 | Driver Var(print_sysroot_headers_suffix) | |
3406 | ||
3407 | quiet | |
3408 | Common Var(quiet_flag) RejectDriver | |
3409 | Do not display functions compiled or elapsed time. | |
3410 | ||
3411 | r | |
3412 | Driver | |
3413 | ||
3414 | s | |
3415 | Driver | |
3416 | ||
3417 | save-temps | |
3418 | Driver | |
3419 | ||
3420 | save-temps= | |
3421 | Driver Joined | |
3422 | ||
3423 | t | |
3424 | Driver | |
3425 | ||
3426 | time | |
3427 | Driver Var(report_times) | |
3428 | ||
3429 | time= | |
3430 | Driver JoinedOrMissing | |
3431 | ||
3432 | u | |
3433 | Driver Joined Separate | |
3434 | ||
3435 | undef | |
3436 | Driver | |
3437 | ; C option, but driver must not handle as "-u ndef". | |
3438 | ||
3439 | v | |
3440 | Common Driver Var(verbose_flag) | |
3441 | Enable verbose output. | |
3442 | ||
3443 | version | |
3444 | Common Var(version_flag) RejectDriver | |
3445 | Display the compiler's version. | |
3446 | ||
3447 | w | |
3448 | Common Var(inhibit_warnings) | |
3449 | Suppress warnings. | |
3450 | ||
3451 | wrapper | |
3452 | Driver Separate Var(wrapper_string) | |
3453 | ||
3454 | x | |
3455 | Driver Joined Separate | |
3456 | ||
3457 | shared | |
3458 | Driver RejectNegative Negative(static-pie) | |
3459 | Create a shared library. | |
3460 | ||
3461 | shared-libgcc | |
3462 | Driver | |
3463 | ||
3464 | specs | |
3465 | Driver Separate Alias(specs=) | |
3466 | ||
3467 | specs= | |
3468 | Driver Joined | |
3469 | ||
3470 | static | |
3471 | Driver | |
3472 | ||
3473 | static-libgcc | |
3474 | Driver | |
3475 | ||
3476 | static-libgfortran | |
3477 | Driver | |
3478 | ; Documented for Fortran, but always accepted by driver. | |
3479 | ||
3480 | static-libstdc++ | |
3481 | Driver | |
3482 | ||
3483 | static-libgo | |
3484 | Driver | |
3485 | ; Documented for Go, but always accepted by driver. | |
3486 | ||
3487 | static-libasan | |
3488 | Driver | |
3489 | ||
3490 | static-libhwasan | |
3491 | Driver | |
3492 | ||
3493 | static-libtsan | |
3494 | Driver | |
3495 | ||
3496 | static-liblsan | |
3497 | Driver | |
3498 | ||
3499 | static-libubsan | |
3500 | Driver | |
3501 | ||
3502 | symbolic | |
3503 | Driver | |
3504 | ||
3505 | no-pie | |
3506 | Driver RejectNegative Negative(shared) | |
3507 | Don't create a dynamically linked position independent executable. | |
3508 | ||
3509 | pie | |
3510 | Driver RejectNegative Negative(no-pie) | |
3511 | Create a dynamically linked position independent executable. | |
3512 | ||
3513 | static-pie | |
3514 | Driver RejectNegative Negative(pie) | |
3515 | Create a static position independent executable. | |
3516 | ||
3517 | z | |
3518 | Driver Joined Separate | |
3519 | ||
3520 | fipa-ra | |
3521 | Common Var(flag_ipa_ra) Optimization | |
3522 | Use caller save register across calls if possible. | |
3523 | ||
3524 | ; This comment is to ensure we retain the blank line above. |