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Commit | Line | Data |
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d7b42618 | 1 | ; Options for the language- and target-independent parts of the compiler. |
50431bc4 | 2 | |
8d9254fc | 3 | ; Copyright (C) 2003-2020 Free Software Foundation, Inc. |
d7b42618 NB |
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 | |
9dcd6f09 | 9 | ; Software Foundation; either version 3, or (at your option) any later |
d7b42618 | 10 | ; version. |
c22cacf3 | 11 | ; |
d7b42618 NB |
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. | |
c22cacf3 | 16 | ; |
d7b42618 | 17 | ; You should have received a copy of the GNU General Public License |
9dcd6f09 NC |
18 | ; along with GCC; see the file COPYING3. If not see |
19 | ; <http://www.gnu.org/licenses/>. | |
d7b42618 | 20 | |
71733172 | 21 | ; See the GCC internals manual (options.texi) for a description of this file's format. |
d7b42618 NB |
22 | |
23 | ; Please try to keep this file in ASCII collating order. | |
24 | ||
e90afde6 JM |
25 | Variable |
26 | int target_flags | |
27 | ||
46625112 JM |
28 | Variable |
29 | int optimize | |
30 | ||
31 | Variable | |
32 | int optimize_size | |
33 | ||
bf7a7185 RG |
34 | Variable |
35 | int optimize_debug | |
36 | ||
0a8134ca JM |
37 | ; Not used directly to control optimizations, only to save -Ofast |
38 | ; setting for "optimize" attributes. | |
39 | Variable | |
40 | int optimize_fast | |
41 | ||
a7d0d30f JM |
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 | ||
1ff9ed6f JH |
49 | ; This variable is set to non-0 only by LTO front-end. 1 indicates that |
50 | ; the output produced will be used for incrmeental linking (thus weak symbols | |
5b42d196 JH |
51 | ; can still be bound) and 2 indicates that the IL is going to be linked and |
52 | ; and output to LTO object file. | |
1ff9ed6f | 53 | Variable |
5b42d196 | 54 | enum incremental_link flag_incremental_link = INCREMENTAL_LINK_NONE |
1ff9ed6f | 55 | |
a75bfaa6 JM |
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 | ||
a75bfaa6 JM |
62 | ; Language specific warning pass for unused results. |
63 | Variable | |
64 | bool flag_warn_unused_result = false | |
65 | ||
d5478783 JM |
66 | ; Nonzero if we should write GIMPLE bytecode for link-time optimization. |
67 | Variable | |
68 | int flag_generate_lto | |
69 | ||
f0d78df9 IV |
70 | ; Nonzero if we should write GIMPLE bytecode for offload compilation. |
71 | Variable | |
72 | int flag_generate_offload = 0 | |
73 | ||
d5478783 JM |
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 | ||
6a1f6c9c JM |
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 | ||
69ccdddb JM |
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 | ||
0576d21f JM |
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 | enum debug_info_type 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 | |
d7d5f241 | 121 | ; write_symbols is set to DBX_DEBUG or XCOFF_DEBUG. |
0576d21f JM |
122 | Variable |
123 | bool use_gnu_debug_info_extensions | |
124 | ||
299404a1 JM |
125 | ; Original value of maximum field alignment in bytes, specified via |
126 | ; -fpack-struct=<value>. | |
127 | Variable | |
128 | unsigned int initial_max_fld_align = TARGET_DEFAULT_PACK_STRUCT | |
129 | ||
5e471ea6 JM |
130 | ; Type of stack check. |
131 | Variable | |
132 | enum stack_check_type flag_stack_check = NO_STACK_CHECK | |
133 | ||
a11e0df4 EB |
134 | ; True if stack usage information needs to be computed. |
135 | Variable | |
136 | bool flag_stack_usage_info = false | |
137 | ||
299404a1 JM |
138 | ; -dA causes debug commentary information to be produced in |
139 | ; the generated assembly code (to make it more readable). This option | |
140 | ; is generally only of use to those who actually need to read the | |
141 | ; generated assembly code (perhaps while debugging the compiler itself). | |
142 | ; Currently, this switch is only used by dwarf2out.c; however, it is intended | |
143 | ; to be a catchall for printing debug information in the assembler file. | |
144 | Variable | |
145 | int flag_debug_asm | |
146 | ||
417ca011 TD |
147 | ; How many NOP insns to place at each function entry by default |
148 | Variable | |
149 | HOST_WIDE_INT function_entry_patch_area_size | |
150 | ||
151 | ; And how far the real asm entry point is into this area | |
152 | Variable | |
153 | HOST_WIDE_INT function_entry_patch_area_start | |
6592d14b PMR |
154 | |
155 | ; Balance between GNAT encodings and standard DWARF to emit. | |
156 | Variable | |
157 | enum dwarf_gnat_encodings gnat_encodings = DWARF_GNAT_ENCODINGS_DEFAULT | |
158 | ||
299404a1 JM |
159 | ; -dP causes the rtl to be emitted as a comment in assembly. |
160 | Variable | |
161 | int flag_dump_rtl_in_asm | |
162 | ||
163 | ; Whether -da was passed (used only in handle_common_deferred_options). | |
164 | Variable | |
165 | bool flag_dump_all_passed | |
166 | ||
167 | ; Other flags saying which kinds of debugging dump have been requested. | |
168 | ||
169 | Variable | |
170 | int rtl_dump_and_exit | |
171 | ||
172 | Variable | |
173 | int flag_print_asm_name | |
174 | ||
a803773f JM |
175 | ; Name of top-level original source file (what was input to cpp). |
176 | ; This comes from the #-command at the beginning of the actual input. | |
177 | ; If there isn't any there, then this is the cc1 input file name. | |
178 | Variable | |
179 | const char *main_input_filename | |
180 | ||
181 | ; Pointer to base name in main_input_filename, with directories and a | |
182 | ; single final extension removed, and the length of this base | |
183 | ; name. | |
184 | ||
185 | Variable | |
186 | const char *main_input_basename | |
187 | ||
188 | Variable | |
189 | int main_input_baselength | |
190 | ||
299404a1 JM |
191 | ; Which options have been printed by --help. |
192 | Variable | |
193 | char *help_printed | |
194 | ||
e6d4b984 JM |
195 | ; Which enums have been printed by --help. 0 = not printed, no |
196 | ; relevant options seen, 1 = relevant option seen, not yet printed, 2 | |
197 | ; = printed. | |
198 | Variable | |
199 | char *help_enum_printed | |
200 | ||
299404a1 JM |
201 | ; The number of columns for --help output. |
202 | Variable | |
203 | unsigned int help_columns | |
204 | ||
205 | ; Whether this options structure has been through finish_options | |
206 | Variable | |
207 | bool flag_opts_finished | |
208 | ||
de5a5fa1 MP |
209 | ; What the sanitizer should instrument |
210 | Variable | |
211 | unsigned int flag_sanitize | |
212 | ||
d95a2703 JJ |
213 | ; What sanitizers should recover from errors |
214 | Variable | |
45b2222a | 215 | unsigned int flag_sanitize_recover = (SANITIZE_UNDEFINED | SANITIZE_UNDEFINED_NONDEFAULT | SANITIZE_KERNEL_ADDRESS) & ~(SANITIZE_UNREACHABLE | SANITIZE_RETURN) |
d95a2703 | 216 | |
f6e50a7d WW |
217 | ; What the coverage sanitizers should instrument |
218 | Variable | |
219 | unsigned int flag_sanitize_coverage | |
95e7bbb8 | 220 | |
91035653 JJ |
221 | ; Flag whether a prefix has been added to dump_base_name |
222 | Variable | |
223 | bool dump_base_name_prefixed = false | |
224 | ||
b2b40051 MJ |
225 | ; Flag whether HSA generation has been explicitely disabled |
226 | Variable | |
227 | bool flag_disable_hsa = false | |
228 | ||
603349bf JM |
229 | ### |
230 | Driver | |
231 | ||
e200444e JM |
232 | -assemble |
233 | Driver Alias(S) | |
234 | ||
235 | -compile | |
236 | Driver Alias(c) | |
237 | ||
d86c7648 ML |
238 | -completion= |
239 | Common Driver Joined Undocumented | |
240 | Provide bash completion for options starting with provided string. | |
241 | ||
e200444e JM |
242 | -coverage |
243 | Driver Alias(coverage) | |
244 | ||
245 | -debug | |
246 | Common Alias(g) | |
247 | ||
248 | -dump | |
249 | Common Separate Alias(d) | |
250 | ||
251 | -dump= | |
252 | Common Joined Alias(d) | |
253 | ||
254 | -dumpbase | |
255 | Common Separate Alias(dumpbase) | |
256 | ||
257 | -dumpdir | |
258 | Common Separate Alias(dumpdir) | |
259 | ||
260 | -entry | |
261 | Driver Separate Alias(e) | |
262 | ||
263 | -entry= | |
264 | Driver Joined Alias(e) | |
265 | ||
266 | -extra-warnings | |
267 | Common Warning Alias(Wextra) | |
268 | ||
269 | -for-assembler | |
270 | Driver Separate Alias(Xassembler) | |
271 | ||
272 | -for-assembler= | |
273 | Driver JoinedOrMissing Alias(Xassembler) | |
274 | ||
275 | -for-linker | |
276 | Driver Separate Alias(Xlinker) | |
277 | ||
278 | -for-linker= | |
279 | Driver JoinedOrMissing Alias(Xlinker) | |
280 | ||
281 | -force-link | |
282 | Driver Separate Alias(u) | |
283 | ||
284 | -force-link= | |
285 | Driver Joined Alias(u) | |
286 | ||
d185d268 | 287 | -help |
e200444e | 288 | Common Driver Var(help_flag) |
a7b2e184 | 289 | Display this information. |
d185d268 | 290 | |
c662432e | 291 | -help= |
603349bf | 292 | Common Driver Report Joined |
a7b2e184 | 293 | --help=<class> Display descriptions of a specific class of options. <class> is one or more of optimizers, target, warnings, undocumented, params. |
903caebf | 294 | |
e200444e JM |
295 | -language |
296 | Driver Separate Alias(x) | |
297 | ||
298 | -language= | |
299 | Driver Joined Alias(x) | |
300 | ||
301 | -library-directory | |
302 | Driver Separate Alias(L) | |
303 | ||
304 | -library-directory= | |
305 | Driver Joined Alias(L) | |
306 | ||
307 | -no-canonical-prefixes | |
308 | Driver Alias(no-canonical-prefixes) | |
309 | ||
310 | -no-standard-libraries | |
311 | Driver Alias(nostdlib) | |
312 | ||
28b4fc51 JM |
313 | -no-sysroot-suffix |
314 | Driver Var(no_sysroot_suffix) | |
315 | ||
e200444e JM |
316 | -no-warnings |
317 | Common Alias(w) | |
318 | ||
319 | -optimize | |
320 | Common Alias(O) | |
321 | ||
322 | -output | |
323 | Common Driver Separate Alias(o) MissingArgError(missing filename after %qs) | |
324 | ||
325 | -output= | |
326 | Common Driver Joined Alias(o) MissingArgError(missing filename after %qs) | |
327 | ||
328 | -pass-exit-codes | |
329 | Driver Alias(pass-exit-codes) | |
330 | ||
331 | -pedantic | |
c1771a20 | 332 | Common Alias(Wpedantic) |
e200444e JM |
333 | |
334 | -pedantic-errors | |
335 | Common Alias(pedantic-errors) | |
336 | ||
337 | -pie | |
5460e1fc | 338 | Driver Alias(pie) |
e200444e | 339 | |
b4fed890 L |
340 | -static-pie |
341 | Driver Alias(static-pie) | |
342 | ||
e200444e JM |
343 | -pipe |
344 | Driver Alias(pipe) | |
345 | ||
346 | -prefix | |
347 | Driver Separate Alias(B) | |
348 | ||
349 | -prefix= | |
350 | Driver JoinedOrMissing Alias(B) | |
351 | ||
352 | -preprocess | |
353 | Driver Alias(E) | |
354 | ||
355 | -print-file-name | |
356 | Driver Separate Alias(print-file-name=) | |
357 | ||
358 | -print-file-name= | |
359 | Driver JoinedOrMissing Alias(print-file-name=) | |
360 | ||
361 | -print-libgcc-file-name | |
362 | Driver Alias(print-libgcc-file-name) | |
363 | ||
364 | -print-multi-directory | |
365 | Driver Alias(print-multi-directory) | |
366 | ||
367 | -print-multi-lib | |
368 | Driver Alias(print-multi-lib) | |
369 | ||
370 | -print-multi-os-directory | |
371 | Driver Alias(print-multi-os-directory) | |
372 | ||
e0cdc09f MK |
373 | -print-multiarch |
374 | Driver Alias(print-multiarch) | |
375 | ||
e200444e JM |
376 | -print-prog-name |
377 | Driver Separate Alias(print-prog-name=) | |
378 | ||
379 | -print-prog-name= | |
380 | Driver JoinedOrMissing Alias(print-prog-name=) | |
381 | ||
382 | -print-search-dirs | |
383 | Driver Alias(print-search-dirs) | |
384 | ||
385 | -print-sysroot | |
386 | Driver Alias(print-sysroot) | |
387 | ||
388 | -print-sysroot-headers-suffix | |
389 | Driver Alias(print-sysroot-headers-suffix) | |
390 | ||
391 | -profile | |
392 | Common Alias(p) | |
393 | ||
394 | -save-temps | |
395 | Driver Alias(save-temps) | |
396 | ||
397 | -shared | |
5460e1fc | 398 | Driver Alias(shared) |
e200444e JM |
399 | |
400 | -specs | |
401 | Driver Separate Alias(specs=) | |
402 | ||
403 | -specs= | |
404 | Driver Joined Alias(specs=) | |
405 | ||
406 | -static | |
407 | Driver Alias(static) | |
408 | ||
409 | -symbolic | |
410 | Driver Alias(symbolic) | |
411 | ||
d185d268 | 412 | -target-help |
603349bf | 413 | Common Driver |
a7b2e184 | 414 | Alias for --help=target. |
c662432e | 415 | |
e200444e JM |
416 | -time |
417 | Driver Alias(time) | |
418 | ||
419 | -verbose | |
420 | Driver Alias(v) | |
421 | ||
422 | ;; The driver used to convert options such as --help into forms such | |
423 | ;; as -fhelp; the following four entries are for compatibility with | |
424 | ;; any direct uses of those (undocumented) -f forms | |
c662432e | 425 | fhelp |
e200444e | 426 | Common Driver Alias(-help) |
c662432e NC |
427 | |
428 | fhelp= | |
e200444e | 429 | Common Driver Joined Alias(-help=) |
c662432e NC |
430 | |
431 | ftarget-help | |
e200444e | 432 | Common Driver Alias(-target-help) |
c662432e | 433 | |
41fd0f9b | 434 | fversion |
e200444e | 435 | Common Driver Alias(-version) |
41fd0f9b | 436 | |
e200444e JM |
437 | -sysroot |
438 | Driver Separate Alias(-sysroot=) | |
439 | ||
603349bf JM |
440 | -sysroot= |
441 | Driver JoinedOrMissing | |
442 | ||
d185d268 | 443 | -version |
603349bf JM |
444 | Common Driver |
445 | ||
446 | B | |
447 | Driver Joined Separate | |
448 | ||
449 | E | |
450 | Driver | |
d185d268 | 451 | |
d9d16a19 JM |
452 | L |
453 | Driver Joined Separate | |
454 | ||
dd9f93dc JM |
455 | N |
456 | Driver | |
457 | ||
903caebf | 458 | O |
ab442df7 | 459 | Common JoinedOrMissing Optimization |
a7b2e184 | 460 | -O<number> Set optimization level to <number>. |
903caebf NB |
461 | |
462 | Os | |
ab442df7 | 463 | Common Optimization |
a7b2e184 | 464 | Optimize for space rather than speed. |
903caebf | 465 | |
be6d3f0e RG |
466 | Ofast |
467 | Common Optimization | |
a7b2e184 | 468 | Optimize for speed disregarding exact standards compliance. |
be6d3f0e | 469 | |
bf7a7185 RG |
470 | Og |
471 | Common Optimization | |
a7b2e184 | 472 | Optimize for debugging experience rather than speed or size. |
bf7a7185 | 473 | |
dd9f93dc JM |
474 | Q |
475 | Driver | |
476 | ||
477 | Qn | |
478 | Driver Negative(Qy) | |
479 | ||
480 | Qy | |
481 | Driver Negative(Qn) | |
482 | ||
6d721f67 JM |
483 | R |
484 | Driver Joined Separate | |
485 | ||
603349bf JM |
486 | S |
487 | Driver | |
488 | ||
6d721f67 JM |
489 | T |
490 | Driver Joined Separate | |
491 | ||
492 | Tbss | |
493 | Driver Separate | |
494 | ||
e69d7376 JM |
495 | Tbss= |
496 | Driver Joined | |
497 | ||
6d721f67 JM |
498 | Tdata |
499 | Driver Separate | |
500 | ||
e69d7376 JM |
501 | Tdata= |
502 | Driver Joined | |
503 | ||
6d721f67 JM |
504 | Ttext |
505 | Driver Separate | |
506 | ||
e69d7376 JM |
507 | Ttext= |
508 | Driver Joined | |
509 | ||
903caebf | 510 | W |
5de8299c | 511 | Common RejectNegative Warning Alias(Wextra) |
a7b2e184 | 512 | This switch is deprecated; use -Wextra instead. |
903caebf | 513 | |
603349bf | 514 | Wa, |
9ed32e27 | 515 | Driver JoinedOrMissing RejectNegative |
603349bf JM |
516 | |
517 | Wl, | |
9ed32e27 | 518 | Driver JoinedOrMissing RejectNegative |
603349bf JM |
519 | |
520 | Wp, | |
9ed32e27 | 521 | Driver JoinedOrMissing RejectNegative |
603349bf | 522 | |
e01cc6dc | 523 | Waggregate-return |
c662432e | 524 | Common Var(warn_aggregate_return) Warning |
a7b2e184 | 525 | Warn about returning structures, unions or arrays. |
e01cc6dc | 526 | |
fbd28bc3 JJ |
527 | Waggressive-loop-optimizations |
528 | Common Var(warn_aggressive_loop_optimizations) Init(1) Warning | |
a7b2e184 | 529 | Warn if a loop with constant number of iterations triggers undefined behavior. |
fbd28bc3 | 530 | |
590b1f2d | 531 | Warray-bounds |
21af5cdf | 532 | Common Var(warn_array_bounds) Warning |
a7b2e184 | 533 | Warn if an array is accessed out of bounds. |
590b1f2d | 534 | |
de1b5c17 | 535 | Warray-bounds= |
63010089 | 536 | Common Joined RejectNegative UInteger Var(warn_array_bounds) Warning IntegerRange(0, 2) |
a7b2e184 | 537 | Warn if an array is accessed out of bounds. |
de1b5c17 | 538 | |
5c498b10 | 539 | Wattributes |
c662432e | 540 | Common Var(warn_attributes) Init(1) Warning |
a7b2e184 | 541 | Warn about inappropriate attribute usage. |
5c498b10 | 542 | |
5ebfd62b BE |
543 | Wattribute-alias |
544 | Common Alias(Wattribute_alias=, 1, 0) Warning | |
d3a02ae5 | 545 | Warn about type safety and similar errors and mismatches in declarations with alias attributes. |
5ebfd62b | 546 | |
79a2c428 MS |
547 | Wattribute-alias= |
548 | Common Joined RejectNegative UInteger Var(warn_attribute_alias) Init(1) Warning IntegerRange(0, 2) | |
d3a02ae5 | 549 | Warn about type safety and similar errors and mismatches in declarations with alias attributes. |
79a2c428 | 550 | |
6902799c IL |
551 | Wcannot-profile |
552 | Common Var(warn_cannot_profile) Init(1) Warning | |
553 | Warn when profiling instrumentation was requested, but could not be applied to | |
554 | a certain function. | |
555 | ||
e01cc6dc | 556 | Wcast-align |
c662432e | 557 | Common Var(warn_cast_align) Warning |
a7b2e184 | 558 | Warn about pointer casts which increase alignment. |
e01cc6dc | 559 | |
1d933576 BE |
560 | Wcast-align=strict |
561 | Common Var(warn_cast_align,2) Warning | |
562 | Warn about pointer casts which increase alignment. | |
563 | ||
87cf0651 SB |
564 | Wcpp |
565 | Common Var(warn_cpp) Init(1) Warning | |
a7b2e184 | 566 | Warn when a #warning directive is encountered. |
87cf0651 | 567 | |
e217792b NM |
568 | Wattribute-warning |
569 | Common Var(warn_attribute_warning) Init(1) Warning | |
570 | Warn about uses of __attribute__((warning)) declarations. | |
571 | ||
99063eee RS |
572 | Wdeprecated |
573 | Common Var(warn_deprecated) Init(1) Warning | |
574 | Warn if a deprecated compiler feature, class, method, or field is used. | |
575 | ||
e01cc6dc | 576 | Wdeprecated-declarations |
c662432e | 577 | Common Var(warn_deprecated_decl) Init(1) Warning |
a7b2e184 | 578 | Warn about uses of __attribute__((deprecated)) declarations. |
e01cc6dc NB |
579 | |
580 | Wdisabled-optimization | |
c662432e | 581 | Common Var(warn_disabled_optimization) Warning |
a7b2e184 | 582 | Warn when an optimization pass is disabled. |
e01cc6dc NB |
583 | |
584 | Werror | |
50431bc4 | 585 | Common Var(warnings_are_errors) |
a7b2e184 | 586 | Treat all warnings as errors. |
e01cc6dc | 587 | |
79cf5994 DD |
588 | Werror= |
589 | Common Joined | |
a7b2e184 | 590 | Treat specified warning as error. |
79cf5994 | 591 | |
903caebf | 592 | Wextra |
62a67c94 | 593 | Common Var(extra_warnings) Warning |
a7b2e184 | 594 | Print extra (possibly unwanted) warnings. |
903caebf | 595 | |
c65a01af | 596 | Wfatal-errors |
50431bc4 | 597 | Common Var(flag_fatal_errors) |
a7b2e184 | 598 | Exit on the first error occurred. |
c65a01af | 599 | |
a214518f | 600 | Wframe-larger-than= |
00abf86c MS |
601 | Common RejectNegative Joined Host_Wide_Int ByteSize Warning Var(warn_frame_larger_than_size) Init(HOST_WIDE_INT_MAX) |
602 | -Wframe-larger-than=<byte-size> Warn if a function's stack frame requires in excess of <byte-size>. | |
a214518f | 603 | |
ae962e57 MS |
604 | Wno-frame-larger-than |
605 | Common Alias(Wframe-larger-than=,18446744073709551615EiB,none) Warning | |
606 | Disable -Wframe-larger-than= warning. Equivalent to -Wframe-larger-than=<SIZE_MAX> or larger. | |
607 | ||
a3a704a4 MH |
608 | Wfree-nonheap-object |
609 | Common Var(warn_free_nonheap_object) Init(1) Warning | |
a7b2e184 | 610 | Warn when attempting to free a non-heap object. |
a3a704a4 | 611 | |
b2b40051 MJ |
612 | Whsa |
613 | Common Var(warn_hsa) Init(1) Warning | |
614 | Warn when a function cannot be expanded to HSAIL. | |
615 | ||
81fea426 | 616 | Wimplicit-fallthrough |
70f6d5e1 JJ |
617 | Common Alias(Wimplicit-fallthrough=,3,0) Warning |
618 | ||
619 | Wimplicit-fallthrough= | |
63010089 | 620 | Common Var(warn_implicit_fallthrough) RejectNegative Joined UInteger Warning IntegerRange(0, 5) |
81fea426 MP |
621 | Warn when a switch case falls through. |
622 | ||
e01cc6dc | 623 | Winline |
a924bffb | 624 | Common Var(warn_inline) Warning Optimization |
a7b2e184 | 625 | Warn when an inlined function cannot be inlined. |
e01cc6dc | 626 | |
86951993 AM |
627 | Winvalid-memory-model |
628 | Common Var(warn_invalid_memory_model) Init(1) Warning | |
629 | Warn when an atomic memory model parameter is known to be outside the valid range. | |
630 | ||
e01cc6dc | 631 | Wlarger-than- |
5de8299c | 632 | Common RejectNegative Joined Warning Undocumented Alias(Wlarger-than=) |
e8fc888d MLI |
633 | |
634 | Wlarger-than= | |
00abf86c MS |
635 | Common RejectNegative Joined Host_Wide_Int ByteSize Warning Var(warn_larger_than_size) Init(HOST_WIDE_INT_MAX) |
636 | -Wlarger-than=<byte-size> Warn if an object's size exceeds <byte-size>. | |
e01cc6dc | 637 | |
ae962e57 MS |
638 | Wno-larger-than |
639 | Common Alias(Wlarger-than=,18446744073709551615EiB,none) Warning | |
640 | Disable -Wlarger-than= warning. Equivalent to -Wlarger-than=<SIZE_MAX> or larger. | |
641 | ||
bf14eba2 JJ |
642 | Wnonnull-compare |
643 | Var(warn_nonnull_compare) Warning | |
644 | Warn if comparing pointer parameter with nonnull attribute with NULL. | |
645 | ||
76787f70 | 646 | Wnull-dereference |
c2d89095 | 647 | Common Var(warn_null_dereference) Warning |
a7b2e184 | 648 | Warn if dereferencing a NULL pointer may lead to erroneous or undefined behavior. |
76787f70 | 649 | |
f9cc1a70 | 650 | Wunsafe-loop-optimizations |
ee79110c JJ |
651 | Common Ignore Warning |
652 | Does nothing. Preserved for backward compatibility. | |
f9cc1a70 | 653 | |
e01cc6dc | 654 | Wmissing-noreturn |
54d62f51 | 655 | Common Warning Alias(Wsuggest-attribute=noreturn) |
e01cc6dc | 656 | |
c59f7203 | 657 | Wodr |
a0fd3373 | 658 | Common Var(warn_odr_violations) Init(1) Warning |
a7b2e184 | 659 | Warn about some C++ One Definition Rule violations during link time optimization. |
c59f7203 | 660 | |
71834ad3 | 661 | Woverflow |
c662432e | 662 | Common Var(warn_overflow) Init(1) Warning |
a7b2e184 | 663 | Warn about overflow in arithmetic expressions. |
71834ad3 | 664 | |
259d29e3 JH |
665 | Wlto-type-mismatch |
666 | Common Var(warn_lto_type_mismatch) Init(1) Warning | |
a7b2e184 | 667 | During link time optimization warn about mismatched types of global declarations. |
259d29e3 | 668 | |
e01cc6dc | 669 | Wpacked |
c662432e | 670 | Common Var(warn_packed) Warning |
a7b2e184 | 671 | Warn when the packed attribute has no effect on struct layout. |
e01cc6dc NB |
672 | |
673 | Wpadded | |
c662432e | 674 | Common Var(warn_padded) Warning |
a7b2e184 | 675 | Warn when padding is required to align structure members. |
e01cc6dc | 676 | |
c1771a20 | 677 | Wpedantic |
2b71f4a4 | 678 | Common Var(pedantic) Init(0) Warning |
a7b2e184 | 679 | Issue warnings needed for strict compliance to the standard. |
c1771a20 | 680 | |
b4dfdc11 MG |
681 | Wreturn-local-addr |
682 | Common Var(warn_return_local_addr) Init(1) Warning | |
683 | Warn about returning a pointer/reference to a local or temporary variable. | |
684 | ||
e01cc6dc | 685 | Wshadow |
c662432e | 686 | Common Var(warn_shadow) Warning |
84ff4775 LCW |
687 | Warn when one variable shadows another. Same as -Wshadow=global. |
688 | ||
689 | Wshadow=global | |
690 | Common Warning Alias(Wshadow) | |
691 | Warn when one variable shadows another (globally). | |
692 | ||
693 | Wshadow=local | |
694 | Common Var(warn_shadow_local) Warning EnabledBy(Wshadow) | |
695 | Warn when one local variable shadows another local variable or parameter. | |
696 | ||
697 | Wshadow-local | |
698 | Common Warning Undocumented Alias(Wshadow=local) | |
699 | ||
700 | Wshadow=compatible-local | |
701 | Common Var(warn_shadow_compatible_local) Warning EnabledBy(Wshadow=local) | |
702 | Warn when one local variable shadows another local variable or parameter of compatible type. | |
703 | ||
704 | Wshadow-compatible-local | |
705 | Common Warning Undocumented Alias(Wshadow=compatible-local) | |
e01cc6dc | 706 | |
7d69de61 | 707 | Wstack-protector |
c662432e | 708 | Common Var(warn_stack_protect) Warning |
a7b2e184 | 709 | Warn when not issuing stack smashing protection for some reason. |
7d69de61 | 710 | |
a11e0df4 | 711 | Wstack-usage= |
00abf86c MS |
712 | Common Joined RejectNegative Host_Wide_Int ByteSize Var(warn_stack_usage) Warning Init(HOST_WIDE_INT_MAX) |
713 | -Wstack-usage=<byte-size> Warn if stack usage might exceed <byte-size>. | |
a11e0df4 | 714 | |
ae962e57 MS |
715 | Wno-stack-usage |
716 | Common Alias(Wstack-usage=,18446744073709551615EiB,none) Warning | |
717 | Disable Wstack-usage= warning. Equivalent to Wstack-usage=<SIZE_MAX> or larger. | |
718 | ||
e01cc6dc | 719 | Wstrict-aliasing |
c662432e | 720 | Common Warning |
a7b2e184 | 721 | Warn about code which might break strict aliasing rules. |
e01cc6dc | 722 | |
5399d643 | 723 | Wstrict-aliasing= |
65d4f2cd | 724 | Common Joined RejectNegative UInteger Var(warn_strict_aliasing) Warning |
a7b2e184 | 725 | Warn about code which might break strict aliasing rules. |
5399d643 | 726 | |
6ac01510 | 727 | Wstrict-overflow |
21af5cdf | 728 | Common Warning |
a7b2e184 | 729 | Warn about optimizations that assume that signed overflow is undefined. |
6ac01510 ILT |
730 | |
731 | Wstrict-overflow= | |
65d4f2cd | 732 | Common Joined RejectNegative UInteger Var(warn_strict_overflow) Warning |
a7b2e184 | 733 | Warn about optimizations that assume that signed overflow is undefined. |
6ac01510 | 734 | |
12b9f3ac JH |
735 | Wsuggest-attribute=cold |
736 | Common Var(warn_suggest_attribute_cold) Warning | |
737 | Warn about functions which might be candidates for __attribute__((cold)). | |
738 | ||
5dc16b19 MLI |
739 | Wsuggest-attribute=const |
740 | Common Var(warn_suggest_attribute_const) Warning | |
a7b2e184 | 741 | Warn about functions which might be candidates for __attribute__((const)). |
5dc16b19 MLI |
742 | |
743 | Wsuggest-attribute=pure | |
744 | Common Var(warn_suggest_attribute_pure) Warning | |
a7b2e184 | 745 | Warn about functions which might be candidates for __attribute__((pure)). |
5dc16b19 | 746 | |
7ea6b6cf JH |
747 | Wsuggest-attribute=noreturn |
748 | Common Var(warn_suggest_attribute_noreturn) Warning | |
a7b2e184 | 749 | Warn about functions which might be candidates for __attribute__((noreturn)). |
7ea6b6cf | 750 | |
0fab169b PK |
751 | Wsuggest-attribute=malloc |
752 | Common Var(warn_suggest_attribute_malloc) Warning | |
753 | Warn about functions which might be candidates for __attribute__((malloc)). | |
754 | ||
91bc34a9 JH |
755 | Wsuggest-final-types |
756 | Common Var(warn_suggest_final_types) Warning | |
a7b2e184 | 757 | Warn about C++ polymorphic types where adding final keyword would improve code quality. |
91bc34a9 JH |
758 | |
759 | Wsuggest-final-methods | |
760 | Common Var(warn_suggest_final_methods) Warning | |
a7b2e184 | 761 | Warn about C++ virtual methods where adding final keyword would improve code quality. |
91bc34a9 | 762 | |
a7dc5980 MP |
763 | Wswitch-unreachable |
764 | Common Var(warn_switch_unreachable) Warning Init(1) | |
765 | Warn about statements between switch's controlling expression and the first | |
766 | case. | |
767 | ||
e01cc6dc | 768 | Wsystem-headers |
c662432e | 769 | Common Var(warn_system_headers) Warning |
a7b2e184 | 770 | Do not suppress warnings from system headers. |
e01cc6dc | 771 | |
8ffadef9 MG |
772 | Wtrampolines |
773 | Common Var(warn_trampolines) Warning | |
a7b2e184 | 774 | Warn whenever a trampoline is generated. |
8ffadef9 | 775 | |
faebccf9 | 776 | Wtype-limits |
95744782 | 777 | Common Var(warn_type_limits) Warning EnabledBy(Wextra) |
a7b2e184 | 778 | Warn if a comparison is always true or always false due to the limited range of the data type. |
faebccf9 | 779 | |
e01cc6dc | 780 | Wuninitialized |
7d5a5747 | 781 | Common Var(warn_uninitialized) Warning EnabledBy(Wextra) |
a7b2e184 | 782 | Warn about uninitialized automatic variables. |
e01cc6dc | 783 | |
2f964ad6 | 784 | Wmaybe-uninitialized |
7d5a5747 | 785 | Common Var(warn_maybe_uninitialized) Warning EnabledBy(Wuninitialized) |
a7b2e184 | 786 | Warn about maybe uninitialized automatic variables. |
2f964ad6 | 787 | |
e01cc6dc | 788 | Wunreachable-code |
f1a62b6f | 789 | Common Ignore Warning |
bc3c12a2 | 790 | Does nothing. Preserved for backward compatibility. |
e01cc6dc | 791 | |
903caebf | 792 | Wunused |
e73f7547 | 793 | Common Var(warn_unused) Init(0) Warning |
a7b2e184 | 794 | Enable all -Wunused- warnings. |
903caebf | 795 | |
ebfbbdc5 | 796 | Wunused-but-set-parameter |
d919140b | 797 | Common Var(warn_unused_but_set_parameter) Warning EnabledBy(Wunused && Wextra) |
a7b2e184 | 798 | Warn when a function parameter is only set, otherwise unused. |
ebfbbdc5 JJ |
799 | |
800 | Wunused-but-set-variable | |
7d5a5747 | 801 | Common Var(warn_unused_but_set_variable) Warning EnabledBy(Wunused) |
a7b2e184 | 802 | Warn when a variable is only set, otherwise unused. |
ebfbbdc5 | 803 | |
e01cc6dc | 804 | Wunused-function |
7d5a5747 | 805 | Common Var(warn_unused_function) Warning EnabledBy(Wunused) |
a7b2e184 | 806 | Warn when a function is unused. |
e01cc6dc NB |
807 | |
808 | Wunused-label | |
7d5a5747 | 809 | Common Var(warn_unused_label) Warning EnabledBy(Wunused) |
a7b2e184 | 810 | Warn when a label is unused. |
e01cc6dc NB |
811 | |
812 | Wunused-parameter | |
d919140b | 813 | Common Var(warn_unused_parameter) Warning EnabledBy(Wunused && Wextra) |
a7b2e184 | 814 | Warn when a function parameter is unused. |
e01cc6dc NB |
815 | |
816 | Wunused-value | |
7d5a5747 | 817 | Common Var(warn_unused_value) Warning EnabledBy(Wunused) |
a7b2e184 | 818 | Warn when an expression value is unused. |
e01cc6dc NB |
819 | |
820 | Wunused-variable | |
7d5a5747 | 821 | Common Var(warn_unused_variable) Warning EnabledBy(Wunused) |
a7b2e184 | 822 | Warn when a variable is unused. |
e01cc6dc | 823 | |
16c1c158 | 824 | Wcoverage-mismatch |
650cfcab | 825 | Common Var(warn_coverage_mismatch) Init(1) Warning |
a7b2e184 | 826 | Warn in case profiles in -fprofile-use do not match. |
16c1c158 | 827 | |
bc162b0e IB |
828 | Wmissing-profile |
829 | Common Var(warn_missing_profile) Init(1) Warning | |
830 | Warn in case profiles in -fprofile-use do not exist. | |
831 | ||
cdbb5ba3 AS |
832 | Wvector-operation-performance |
833 | Common Var(warn_vector_operation_performance) Warning | |
a7b2e184 | 834 | Warn when a vector operation is compiled outside the SIMD. |
cdbb5ba3 | 835 | |
603349bf JM |
836 | Xassembler |
837 | Driver Separate | |
838 | ||
839 | Xlinker | |
840 | Driver Separate | |
841 | ||
842 | Xpreprocessor | |
843 | Driver Separate | |
844 | ||
dd9f93dc JM |
845 | Z |
846 | Driver | |
847 | ||
d185d268 | 848 | aux-info |
d5478783 | 849 | Common Separate Var(aux_info_file_name) |
a7b2e184 | 850 | -aux-info <file> Emit declaration information into <file>. |
d185d268 NB |
851 | |
852 | aux-info= | |
5de8299c | 853 | Common Joined Alias(aux-info) |
d185d268 NB |
854 | |
855 | auxbase | |
d5478783 | 856 | Common Separate RejectDriver Var(aux_base_name) |
d185d268 NB |
857 | |
858 | auxbase-strip | |
603349bf JM |
859 | Common Separate RejectDriver |
860 | ||
e200444e JM |
861 | coverage |
862 | Driver | |
863 | ||
603349bf JM |
864 | c |
865 | Driver | |
d185d268 NB |
866 | |
867 | d | |
868 | Common Joined | |
a7b2e184 | 869 | -d<letters> Enable dumps from specific passes of the compiler. |
d185d268 NB |
870 | |
871 | dumpbase | |
d5478783 | 872 | Common Separate Var(dump_base_name) |
a7b2e184 | 873 | -dumpbase <file> Set the file basename to be used for dumps. |
d185d268 | 874 | |
d7fb0a6d | 875 | dumpdir |
d5478783 | 876 | Common Separate Var(dump_dir_name) |
a7b2e184 | 877 | -dumpdir <dir> Set the directory name to be used for dumps. |
d7fb0a6d | 878 | |
603349bf JM |
879 | dumpmachine |
880 | Driver | |
881 | ||
882 | dumpspecs | |
883 | Driver | |
884 | ||
885 | dumpversion | |
886 | Driver | |
887 | ||
3c36aa6b JJ |
888 | dumpfullversion |
889 | Driver | |
890 | ||
e200444e JM |
891 | e |
892 | Driver Joined Separate | |
893 | ||
fa381cb2 JM |
894 | ; This option has historically been passed down to the linker by an |
895 | ; accident of a %{e*} spec, so ensure it continues to be passed down | |
896 | ; as a single option. The supported option for this purpose is | |
897 | ; -rdynamic. See PR 47390. | |
898 | export-dynamic | |
899 | Driver Undocumented | |
900 | ||
31b66477 KC |
901 | ; The version of the C++ ABI in use. The following values are allowed: |
902 | ; | |
903 | ; 0: The version of the ABI believed most conformant with the C++ ABI | |
904 | ; specification. This ABI may change as bugs are discovered and fixed. | |
905 | ; Therefore, 0 will not necessarily indicate the same ABI in different | |
906 | ; versions of G++. | |
907 | ; | |
90d84934 | 908 | ; 1: The version of the ABI first used in G++ 3.2. No longer selectable. |
31b66477 | 909 | ; |
785f21af JM |
910 | ; 2: The version of the ABI first used in G++ 3.4, and the default |
911 | ; until GCC 4.9. | |
abfe01ce JM |
912 | ; |
913 | ; 3: The version of the ABI that fixes the missing underscore | |
914 | ; in template non-type arguments of pointer type. | |
915 | ; | |
916 | ; 4: The version of the ABI that introduces unambiguous mangling of | |
55af847f | 917 | ; vector types. First selectable in G++ 4.5. |
99a8d35b | 918 | ; |
67e18edb | 919 | ; 5: The version of the ABI that ignores attribute const/noreturn |
55af847f | 920 | ; in function pointer mangling, and corrects mangling of decltype and |
67e18edb | 921 | ; function parameters used in other parameters and the return type. |
55af847f | 922 | ; First selectable in G++ 4.6. |
67e18edb | 923 | ; |
4b6aaa99 JM |
924 | ; 6: The version of the ABI that doesn't promote scoped enums to int and |
925 | ; changes the mangling of template argument packs, const/static_cast, | |
926 | ; prefix ++ and --, and a class scope function used as a template | |
927 | ; argument. | |
967444bb JM |
928 | ; First selectable in G++ 4.7. |
929 | ; | |
622aac0b JM |
930 | ; 7: The version of the ABI that treats nullptr_t as a builtin type and |
931 | ; corrects the mangling of lambdas in default argument scope. | |
a3ddb738 | 932 | ; First selectable in G++ 4.8. |
0861bec8 JM |
933 | ; |
934 | ; 8: The version of the ABI that corrects the substitution behavior of | |
935 | ; function types with function-cv-qualifiers. | |
603eaec4 JM |
936 | ; First selectable in G++ 4.9 and default in G++ 5. |
937 | ; | |
a03c9bf1 JM |
938 | ; 9: The version of the ABI that corrects the alignment of nullptr_t. |
939 | ; First selectable and default in G++ 5.2. | |
940 | ; | |
941 | ; 10: The version of the ABI that mangles attributes that affect type | |
942 | ; identity, such as ia32 calling convention attributes (stdcall, etc.) | |
943 | ; Default in G++ 6 (set in c_common_post_options). | |
0861bec8 | 944 | ; |
31f7f784 JM |
945 | ; 11: The version of the ABI that corrects mangling of sizeof... expressions |
946 | ; and introduces new inheriting constructor handling. | |
34bbc4c5 JM |
947 | ; Default in G++ 7. |
948 | ; | |
f3ec182d | 949 | ; 12: Corrects the calling convention for classes with only deleted copy/move |
974aedcc | 950 | ; constructors and changes passing/returning of empty records. |
34a7a230 JM |
951 | ; Default in G++ 8.1. |
952 | ; | |
953 | ; 13: Fixes the accidental change in 12 to the calling convention for classes | |
954 | ; with deleted copy constructor and trivial move constructor. | |
955 | ; Default in G++ 8.2. | |
e0c866dd KK |
956 | ; 14: Corrects the mangling of nullptr expression. |
957 | ; Default in G++ 10. | |
f3ec182d | 958 | ; |
31b66477 KC |
959 | ; Additional positive integers will be assigned as new versions of |
960 | ; the ABI become the default version of the ABI. | |
57782ad8 | 961 | fabi-version= |
ca0e51a0 | 962 | Common Joined RejectNegative UInteger Var(flag_abi_version) Init(0) |
a7b2e184 | 963 | The version of the C++ ABI in use. |
57782ad8 | 964 | |
6e616110 | 965 | faggressive-loop-optimizations |
a7b2e184 MS |
966 | Common Report Var(flag_aggressive_loop_optimizations) Optimization Init(1) |
967 | Aggressively optimize loops using language constraints. | |
6e616110 | 968 | |
6ff3a151 | 969 | falign-functions |
c518c102 | 970 | Common Report Var(flag_align_functions) Optimization |
a7b2e184 | 971 | Align the start of functions. |
6ff3a151 | 972 | |
058de654 | 973 | falign-functions= |
c518c102 | 974 | Common RejectNegative Joined Var(str_align_functions) Optimization |
058de654 | 975 | |
8cac4d85 BS |
976 | flimit-function-alignment |
977 | Common Report Var(flag_limit_function_alignment) Optimization Init(0) | |
978 | ||
6ff3a151 | 979 | falign-jumps |
c518c102 | 980 | Common Report Var(flag_align_jumps) Optimization |
a7b2e184 | 981 | Align labels which are only reached by jumping. |
6ff3a151 | 982 | |
058de654 | 983 | falign-jumps= |
c518c102 | 984 | Common RejectNegative Joined Var(str_align_jumps) Optimization |
058de654 | 985 | |
6ff3a151 | 986 | falign-labels |
c518c102 | 987 | Common Report Var(flag_align_labels) Optimization |
a7b2e184 | 988 | Align all labels. |
6ff3a151 | 989 | |
058de654 | 990 | falign-labels= |
c518c102 | 991 | Common RejectNegative Joined Var(str_align_labels) Optimization |
058de654 | 992 | |
6ff3a151 | 993 | falign-loops |
c518c102 | 994 | Common Report Var(flag_align_loops) Optimization |
a7b2e184 | 995 | Align the start of loops. |
6ff3a151 | 996 | |
058de654 | 997 | falign-loops= |
8956e247 | 998 | Common RejectNegative Joined Var(str_align_loops) Optimization |
058de654 | 999 | |
e622a32d RB |
1000 | fallow-store-data-races |
1001 | Common Report Var(flag_store_data_races) Optimization | |
1002 | Allow the compiler to introduce new data races on stores. | |
1003 | ||
757bf1df DM |
1004 | fanalyzer |
1005 | Common Var(flag_analyzer) | |
1006 | Enable static analysis pass. | |
1007 | ||
6ff3a151 | 1008 | fargument-alias |
2d2bd949 | 1009 | Common Ignore |
0d3c82d6 | 1010 | Does nothing. Preserved for backward compatibility. |
6ff3a151 NB |
1011 | |
1012 | fargument-noalias | |
2d2bd949 | 1013 | Common Ignore |
0d3c82d6 | 1014 | Does nothing. Preserved for backward compatibility. |
6ff3a151 NB |
1015 | |
1016 | fargument-noalias-global | |
2d2bd949 | 1017 | Common Ignore |
0d3c82d6 | 1018 | Does nothing. Preserved for backward compatibility. |
6ff3a151 | 1019 | |
0698a1d2 | 1020 | fargument-noalias-anything |
2d2bd949 | 1021 | Common Ignore |
0d3c82d6 | 1022 | Does nothing. Preserved for backward compatibility. |
0698a1d2 | 1023 | |
de5a5fa1 MP |
1024 | fsanitize= |
1025 | Common Driver Report Joined | |
a7b2e184 | 1026 | Select what to sanitize. |
32b4b7f5 | 1027 | |
f6e50a7d WW |
1028 | fsanitize-coverage= |
1029 | Common Report Joined | |
cefc0906 | 1030 | Select type of coverage sanitization. |
f6e50a7d | 1031 | |
fd960af2 YG |
1032 | fasan-shadow-offset= |
1033 | Common Joined RejectNegative Var(common_deferred_options) Defer | |
1034 | -fasan-shadow-offset=<number> Use custom shadow memory offset. | |
1035 | ||
18af8d16 YG |
1036 | fsanitize-sections= |
1037 | Common Joined RejectNegative Var(common_deferred_options) Defer | |
1038 | -fsanitize-sections=<sec1,sec2,...> Sanitize global variables | |
1039 | in user-defined sections. | |
1040 | ||
d95a2703 JJ |
1041 | fsanitize-recover= |
1042 | Common Report Joined | |
a7b2e184 | 1043 | After diagnosing undefined behavior attempt to continue execution. |
1c33c9b7 | 1044 | |
d95a2703 JJ |
1045 | fsanitize-recover |
1046 | Common Report | |
a7b2e184 | 1047 | This switch is deprecated; use -fsanitize-recover= instead. |
d95a2703 | 1048 | |
6dc4a604 ML |
1049 | fsanitize-address-use-after-scope |
1050 | Common Driver Report Var(flag_sanitize_address_use_after_scope) Init(0) | |
1051 | ||
1c33c9b7 | 1052 | fsanitize-undefined-trap-on-error |
0115b91d | 1053 | Common Driver Report Var(flag_sanitize_undefined_trap_on_error) Init(0) |
a7b2e184 | 1054 | Use trap instead of a library function for undefined behavior sanitization. |
1c33c9b7 | 1055 | |
6ff3a151 | 1056 | fasynchronous-unwind-tables |
c662432e | 1057 | Common Report Var(flag_asynchronous_unwind_tables) Optimization |
a7b2e184 | 1058 | Generate unwind tables that are exact at each instruction boundary. |
6ff3a151 | 1059 | |
6fb5fa3c | 1060 | fauto-inc-dec |
b16650ac | 1061 | Common Report Var(flag_auto_inc_dec) Init(1) Optimization |
a7b2e184 | 1062 | Generate auto-inc/dec instructions. |
6fb5fa3c | 1063 | |
be3c16c4 | 1064 | fauto-profile |
b16650ac | 1065 | Common Report Var(flag_auto_profile) |
be3c16c4 DC |
1066 | Use sample profile information for call graph node weights. The default |
1067 | profile file is fbdata.afdo in 'pwd'. | |
1068 | ||
1069 | fauto-profile= | |
1070 | Common Joined RejectNegative Var(auto_profile_file) | |
1071 | Use sample profile information for call graph node weights. The profile | |
1072 | file is specified in the argument. | |
1073 | ||
31b66477 KC |
1074 | ; -fcheck-bounds causes gcc to generate array bounds checks. |
1075 | ; For C, C++ and ObjC: defaults off. | |
1076 | ; For Java: defaults to on. | |
1077 | ; For Fortran: defaults to off. | |
6ff3a151 | 1078 | fbounds-check |
50431bc4 | 1079 | Common Report Var(flag_bounds_check) |
a7b2e184 | 1080 | Generate code to check bounds before indexing arrays. |
6ff3a151 NB |
1081 | |
1082 | fbranch-count-reg | |
14379e66 | 1083 | Common Report Var(flag_branch_on_count_reg) Optimization |
a7b2e184 | 1084 | Replace add, compare, branch with branch on count register. |
6ff3a151 NB |
1085 | |
1086 | fbranch-probabilities | |
c662432e | 1087 | Common Report Var(flag_branch_probabilities) Optimization |
a7b2e184 | 1088 | Use profiling information for branch probabilities. |
6ff3a151 | 1089 | |
de32c0cb | 1090 | fbranch-target-load-optimize |
f78f73cb RS |
1091 | Common Ignore |
1092 | Does nothing. Preserved for backward compatibility. | |
de32c0cb NB |
1093 | |
1094 | fbranch-target-load-optimize2 | |
f78f73cb RS |
1095 | Common Ignore |
1096 | Does nothing. Preserved for backward compatibility. | |
de32c0cb | 1097 | |
1194fc79 | 1098 | fbtr-bb-exclusive |
f78f73cb RS |
1099 | Common Ignore |
1100 | Does nothing. Preserved for backward compatibility. | |
1194fc79 | 1101 | |
3cf3da88 EB |
1102 | fcallgraph-info |
1103 | Common Report RejectNegative Var(flag_callgraph_info) Init(NO_CALLGRAPH_INFO); | |
1104 | Output callgraph information on a per-file basis. | |
1105 | ||
1106 | fcallgraph-info= | |
1107 | Common Report RejectNegative Joined | |
1108 | Output callgraph information on a per-file basis with decorations. | |
1109 | ||
058de654 | 1110 | fcall-saved- |
21bf1558 | 1111 | Common Joined RejectNegative Var(common_deferred_options) Defer |
a7b2e184 | 1112 | -fcall-saved-<register> Mark <register> as being preserved across functions. |
058de654 NB |
1113 | |
1114 | fcall-used- | |
21bf1558 | 1115 | Common Joined RejectNegative Var(common_deferred_options) Defer |
a7b2e184 | 1116 | -fcall-used-<register> Mark <register> as being corrupted by function calls. |
058de654 | 1117 | |
31b66477 KC |
1118 | ; Nonzero for -fcaller-saves: allocate values in regs that need to |
1119 | ; be saved across function calls, if that produces overall better code. | |
1120 | ; Optional now, so people can test it. | |
de32c0cb | 1121 | fcaller-saves |
c662432e | 1122 | Common Report Var(flag_caller_saves) Optimization |
a7b2e184 | 1123 | Save registers around function calls. |
de32c0cb | 1124 | |
3d8864c0 | 1125 | fcheck-data-deps |
c0c12356 | 1126 | Common Ignore |
49b8fe6c | 1127 | This switch is deprecated; do not use. |
3d8864c0 | 1128 | |
2284b034 MG |
1129 | fcheck-new |
1130 | Common Var(flag_check_new) | |
a7b2e184 | 1131 | Check the return value of new in C++. |
2284b034 | 1132 | |
6d27d749 | 1133 | fchecking |
b06f87c7 | 1134 | Common Var(flag_checking) Init(CHECKING_P ? ENABLE_EXTRA_CHECKING ? 2 : 1 : 0) |
6d27d749 RB |
1135 | Perform internal consistency checkings. |
1136 | ||
7db11a5a JJ |
1137 | fchecking= |
1138 | Common Joined RejectNegative UInteger Var(flag_checking) | |
1139 | Perform internal consistency checkings. | |
1140 | ||
37ccb0ba SB |
1141 | fcode-hoisting |
1142 | Common Report Var(flag_code_hoisting) Optimization | |
1143 | Enable code hoisting. | |
1144 | ||
ccaeeafe NC |
1145 | fcombine-stack-adjustments |
1146 | Common Report Var(flag_combine_stack_adjustments) Optimization | |
1147 | Looks for opportunities to reduce stack adjustments and stack references. | |
1148 | ||
6ff3a151 | 1149 | fcommon |
6271dd98 | 1150 | Common Report Var(flag_no_common,0) Init(1) |
df73e971 | 1151 | Put uninitialized globals in the common section. |
6ff3a151 | 1152 | |
603349bf JM |
1153 | fcompare-debug |
1154 | Driver | |
1155 | ; Converted by the driver to -fcompare-debug= options. | |
1156 | ||
2153915d | 1157 | fcompare-debug= |
603349bf | 1158 | Common Driver JoinedOrMissing RejectNegative Var(flag_compare_debug_opt) |
a7b2e184 | 1159 | -fcompare-debug[=<opts>] Compile with and without e.g. -gtoggle, and compare the final-insns dump. |
2153915d AO |
1160 | |
1161 | fcompare-debug-second | |
5e471ea6 | 1162 | Common Driver RejectNegative Var(flag_compare_debug) |
a7b2e184 | 1163 | Run only the second compilation of -fcompare-debug. |
2153915d | 1164 | |
e692f276 RH |
1165 | fcompare-elim |
1166 | Common Report Var(flag_compare_elim_after_reload) Optimization | |
a7b2e184 | 1167 | Perform comparison elimination after register allocation has finished. |
e692f276 | 1168 | |
b5b8b0ac AO |
1169 | fconserve-stack |
1170 | Common Var(flag_conserve_stack) Optimization | |
a7b2e184 | 1171 | Do not perform optimizations increasing noticeably stack usage. |
b5b8b0ac | 1172 | |
6ff3a151 | 1173 | fcprop-registers |
c662432e | 1174 | Common Report Var(flag_cprop_registers) Optimization |
a7b2e184 | 1175 | Perform a register copy-propagation optimization pass. |
6ff3a151 | 1176 | |
de32c0cb | 1177 | fcrossjumping |
c662432e | 1178 | Common Report Var(flag_crossjumping) Optimization |
a7b2e184 | 1179 | Perform cross-jumping optimization. |
de32c0cb NB |
1180 | |
1181 | fcse-follow-jumps | |
c662432e | 1182 | Common Report Var(flag_cse_follow_jumps) Optimization |
a7b2e184 | 1183 | When running CSE, follow jumps to their targets. |
de32c0cb NB |
1184 | |
1185 | fcse-skip-blocks | |
2d2bd949 | 1186 | Common Ignore |
5f39ad47 | 1187 | Does nothing. Preserved for backward compatibility. |
de32c0cb | 1188 | |
c7463669 | 1189 | fcx-limited-range |
5e46b0c6 | 1190 | Common Report Var(flag_cx_limited_range) Optimization SetByCombined |
a7b2e184 | 1191 | Omit range reduction step when performing complex division. |
c7463669 | 1192 | |
35085f76 JB |
1193 | fcx-fortran-rules |
1194 | Common Report Var(flag_cx_fortran_rules) Optimization | |
a7b2e184 | 1195 | Complex multiplication and division follow Fortran rules. |
35085f76 | 1196 | |
6ff3a151 | 1197 | fdata-sections |
b16650ac | 1198 | Common Report Var(flag_data_sections) |
a7b2e184 | 1199 | Place data items into their own section. |
6ff3a151 | 1200 | |
0a090f42 | 1201 | fdbg-cnt-list |
299404a1 | 1202 | Common Report Var(common_deferred_options) Defer |
0a090f42 SP |
1203 | List all available debugging counters with their limits and counts. |
1204 | ||
6fb5fa3c | 1205 | fdbg-cnt= |
299404a1 | 1206 | Common RejectNegative Joined Var(common_deferred_options) Defer |
83a49336 | 1207 | -fdbg-cnt=<counter>[:<lower_limit1>-]<upper_limit1>[:<lower_limit2>-<upper_limit2>:...][,<counter>:...] Set the debug counter limit. |
6fb5fa3c | 1208 | |
c8aea42c | 1209 | fdebug-prefix-map= |
299404a1 | 1210 | Common Joined RejectNegative Var(common_deferred_options) Defer |
b408e010 | 1211 | -fdebug-prefix-map=<old>=<new> Map one directory name to another in debug information. |
7365279f BK |
1212 | |
1213 | ffile-prefix-map= | |
1214 | Common Joined RejectNegative Var(common_deferred_options) Defer | |
b408e010 | 1215 | -ffile-prefix-map=<old>=<new> Map one directory name to another in compilation result. |
c8aea42c | 1216 | |
76f9db36 | 1217 | fdebug-types-section |
98095aa3 | 1218 | Common Report Var(flag_debug_types_section) Init(0) |
76f9db36 JJ |
1219 | Output .debug_types section when using DWARF v4 debuginfo. |
1220 | ||
31b66477 KC |
1221 | ; Nonzero for -fdefer-pop: don't pop args after each function call |
1222 | ; instead save them up to pop many calls' args with one insns. | |
de32c0cb | 1223 | fdefer-pop |
c662432e | 1224 | Common Report Var(flag_defer_pop) Optimization |
a7b2e184 | 1225 | Defer popping functions args from stack until later. |
de32c0cb NB |
1226 | |
1227 | fdelayed-branch | |
c662432e | 1228 | Common Report Var(flag_delayed_branch) Optimization |
a7b2e184 | 1229 | Attempt to fill delay slots of branch instructions. |
de32c0cb | 1230 | |
2da02156 | 1231 | fdelete-dead-exceptions |
b16650ac | 1232 | Common Report Var(flag_delete_dead_exceptions) Init(0) Optimization |
a7b2e184 | 1233 | Delete dead instructions that may throw exceptions. |
2da02156 | 1234 | |
de32c0cb | 1235 | fdelete-null-pointer-checks |
467d8d51 | 1236 | Common Report Var(flag_delete_null_pointer_checks) Init(-1) Optimization |
a7b2e184 | 1237 | Delete useless null pointer checks. |
de32c0cb | 1238 | |
1e29e4d3 JH |
1239 | fdevirtualize-at-ltrans |
1240 | Common Report Var(flag_ltrans_devirtualize) | |
a7b2e184 | 1241 | Stream extra data to support more aggressive devirtualization in LTO local transformation mode. |
1e29e4d3 | 1242 | |
bbc9396b JH |
1243 | fdevirtualize-speculatively |
1244 | Common Report Var(flag_devirtualize_speculatively) Optimization | |
a7b2e184 | 1245 | Perform speculative devirtualization. |
bbc9396b | 1246 | |
ca1eedf6 JH |
1247 | fdevirtualize |
1248 | Common Report Var(flag_devirtualize) Optimization | |
1249 | Try to convert virtual calls to direct ones. | |
1250 | ||
de32c0cb | 1251 | fdiagnostics-show-location= |
e6d4b984 | 1252 | Common Joined RejectNegative Enum(diagnostic_prefixing_rule) |
a7b2e184 | 1253 | -fdiagnostics-show-location=[once|every-line] How often to emit source location at the beginning of line-wrapped diagnostics. |
de32c0cb | 1254 | |
e6d4b984 JM |
1255 | ; Required for these enum values. |
1256 | SourceInclude | |
1257 | pretty-print.h | |
1258 | ||
1259 | Enum | |
1260 | Name(diagnostic_prefixing_rule) Type(int) | |
1261 | ||
1262 | EnumValue | |
1263 | Enum(diagnostic_prefixing_rule) String(once) Value(DIAGNOSTICS_SHOW_PREFIX_ONCE) | |
1264 | ||
1265 | EnumValue | |
1266 | Enum(diagnostic_prefixing_rule) String(every-line) Value(DIAGNOSTICS_SHOW_PREFIX_EVERY_LINE) | |
1267 | ||
9fec0042 MLI |
1268 | fdiagnostics-show-caret |
1269 | Common Var(flag_diagnostics_show_caret) Init(1) | |
a7b2e184 | 1270 | Show the source line with a caret indicating the column. |
9fec0042 | 1271 | |
96e6ae57 DM |
1272 | fdiagnostics-show-labels |
1273 | Common Var(flag_diagnostics_show_labels) Init(1) | |
04e5c73d | 1274 | Show labels annotating ranges of source code when showing source. |
96e6ae57 | 1275 | |
56b61d7f DM |
1276 | fdiagnostics-show-line-numbers |
1277 | Common Var(flag_diagnostics_show_line_numbers) Init(1) | |
04e5c73d | 1278 | Show line numbers in the left margin when showing source. |
56b61d7f | 1279 | |
4b84d650 JJ |
1280 | fdiagnostics-color |
1281 | Common Alias(fdiagnostics-color=,always,never) | |
1282 | ; | |
1283 | ||
1284 | fdiagnostics-color= | |
97aa8bb6 | 1285 | Driver Common Joined RejectNegative Var(flag_diagnostics_show_color) Enum(diagnostic_color_rule) Init(DIAGNOSTICS_COLOR_NO) |
a7b2e184 | 1286 | -fdiagnostics-color=[never|always|auto] Colorize diagnostics. |
4b84d650 JJ |
1287 | |
1288 | ; Required for these enum values. | |
1289 | SourceInclude | |
1290 | diagnostic-color.h | |
1291 | ||
1292 | Enum | |
1293 | Name(diagnostic_color_rule) Type(int) | |
1294 | ||
1295 | EnumValue | |
1296 | Enum(diagnostic_color_rule) String(never) Value(DIAGNOSTICS_COLOR_NO) | |
1297 | ||
1298 | EnumValue | |
1299 | Enum(diagnostic_color_rule) String(always) Value(DIAGNOSTICS_COLOR_YES) | |
1300 | ||
1301 | EnumValue | |
1302 | Enum(diagnostic_color_rule) String(auto) Value(DIAGNOSTICS_COLOR_AUTO) | |
1303 | ||
d2608235 DM |
1304 | fdiagnostics-urls= |
1305 | Driver Common Joined RejectNegative Var(flag_diagnostics_show_urls) Enum(diagnostic_url_rule) Init(DIAGNOSTICS_URL_AUTO) | |
1306 | -fdiagnostics-urls=[never|always|auto] Embed URLs in diagnostics. | |
1307 | ||
1308 | ; Required for these enum values. | |
1309 | SourceInclude | |
1310 | diagnostic-url.h | |
1311 | ||
1312 | Enum | |
1313 | Name(diagnostic_url_rule) Type(int) | |
1314 | ||
1315 | EnumValue | |
1316 | Enum(diagnostic_url_rule) String(never) Value(DIAGNOSTICS_URL_NO) | |
1317 | ||
1318 | EnumValue | |
1319 | Enum(diagnostic_url_rule) String(always) Value(DIAGNOSTICS_URL_YES) | |
1320 | ||
1321 | EnumValue | |
1322 | Enum(diagnostic_url_rule) String(auto) Value(DIAGNOSTICS_URL_AUTO) | |
1323 | ||
478dd60d DM |
1324 | fdiagnostics-format= |
1325 | Common Joined RejectNegative Enum(diagnostics_output_format) | |
b408e010 | 1326 | -fdiagnostics-format=[text|json] Select output format. |
478dd60d DM |
1327 | |
1328 | ; Required for these enum values. | |
1329 | SourceInclude | |
1330 | diagnostic.h | |
1331 | ||
1332 | Enum | |
1333 | Name(diagnostics_output_format) Type(int) | |
1334 | ||
1335 | EnumValue | |
1336 | Enum(diagnostics_output_format) String(text) Value(DIAGNOSTICS_OUTPUT_FORMAT_TEXT) | |
1337 | ||
1338 | EnumValue | |
1339 | Enum(diagnostics_output_format) String(json) Value(DIAGNOSTICS_OUTPUT_FORMAT_JSON) | |
1340 | ||
a93eac6a DM |
1341 | fdiagnostics-parseable-fixits |
1342 | Common Var(flag_diagnostics_parseable_fixits) | |
8135a004 | 1343 | Print fix-it hints in machine-readable form. |
a93eac6a | 1344 | |
717ebe91 DM |
1345 | fdiagnostics-generate-patch |
1346 | Common Var(flag_diagnostics_generate_patch) | |
1347 | Print fix-it hints to stderr in unified diff format. | |
1348 | ||
ccf08a6e | 1349 | fdiagnostics-show-option |
c7d0de89 | 1350 | Common Var(flag_diagnostics_show_option) Init(1) |
a7b2e184 | 1351 | Amend appropriate diagnostic messages with the command line option that controls them. |
ccf08a6e | 1352 | |
6d4a35ca DM |
1353 | fdiagnostics-show-cwe |
1354 | Common Var(flag_diagnostics_show_cwe) Init(1) | |
1355 | Print CWE identifiers for diagnostic messages, where available. | |
1356 | ||
4bc1899b DM |
1357 | fdiagnostics-path-format= |
1358 | Common Joined RejectNegative Var(flag_diagnostics_path_format) Enum(diagnostic_path_format) Init(DPF_INLINE_EVENTS) | |
1359 | Specify how to print any control-flow path associated with a diagnostic. | |
1360 | ||
1361 | Enum | |
1362 | Name(diagnostic_path_format) Type(int) | |
1363 | ||
1364 | EnumValue | |
1365 | Enum(diagnostic_path_format) String(none) Value(DPF_NONE) | |
1366 | ||
1367 | EnumValue | |
1368 | Enum(diagnostic_path_format) String(separate-events) Value(DPF_SEPARATE_EVENTS) | |
1369 | ||
1370 | EnumValue | |
1371 | Enum(diagnostic_path_format) String(inline-events) Value(DPF_INLINE_EVENTS) | |
1372 | ||
1373 | fdiagnostics-show-path-depths | |
1374 | Common Var(flag_diagnostics_show_path_depths) Init(0) | |
1375 | Show stack depths of events in paths. | |
1376 | ||
0141ab44 DM |
1377 | fdiagnostics-minimum-margin-width= |
1378 | Common Joined UInteger Var(diagnostics_minimum_margin_width) Init(6) | |
04e5c73d | 1379 | Set minimum width of left margin of source code when showing source. |
0141ab44 | 1380 | |
226c52aa XDL |
1381 | fdisable- |
1382 | Common Joined RejectNegative Var(common_deferred_options) Defer | |
b408e010 | 1383 | -fdisable-[tree|rtl|ipa]-<pass>=range1+range2 Disable an optimization pass. |
226c52aa XDL |
1384 | |
1385 | fenable- | |
1386 | Common Joined RejectNegative Var(common_deferred_options) Defer | |
b408e010 | 1387 | -fenable-[tree|rtl|ipa]-<pass>=range1+range2 Enable an optimization pass. |
226c52aa | 1388 | |
6de9cd9a | 1389 | fdump- |
21bf1558 | 1390 | Common Joined RejectNegative Var(common_deferred_options) Defer |
a7b2e184 | 1391 | -fdump-<type> Dump various compiler internals to a file. |
6de9cd9a | 1392 | |
d1583032 JM |
1393 | fdump-final-insns |
1394 | Driver RejectNegative | |
1395 | ||
2153915d AO |
1396 | fdump-final-insns= |
1397 | Common RejectNegative Joined Var(flag_dump_final_insns) | |
a7b2e184 | 1398 | -fdump-final-insns=filename Dump to filename the insns at the end of translation. |
2153915d | 1399 | |
c6a13190 ILT |
1400 | fdump-go-spec= |
1401 | Common RejectNegative Joined Var(flag_dump_go_spec) | |
a7b2e184 | 1402 | -fdump-go-spec=filename Write all declarations to file as Go code. |
c6a13190 | 1403 | |
24a7799e R |
1404 | fdump-noaddr |
1405 | Common Report Var(flag_dump_noaddr) | |
a7b2e184 | 1406 | Suppress output of addresses in debugging dumps. |
24a7799e | 1407 | |
dc10fd96 JJ |
1408 | freport-bug |
1409 | Common Driver Var(flag_report_bug) | |
1410 | Collect and dump debug information into temporary file if ICE in C/C++ | |
bd2c6270 | 1411 | compiler occurred. |
dc10fd96 | 1412 | |
ba4ad400 DM |
1413 | fdump-internal-locations |
1414 | Common Var(flag_dump_locations) Init(0) | |
a7b2e184 | 1415 | Dump detailed information on GCC's internal representation of source code locations. |
ba4ad400 | 1416 | |
deced1e2 XDL |
1417 | fdump-passes |
1418 | Common Var(flag_dump_passes) Init(0) | |
a7b2e184 | 1419 | Dump optimization passes. |
deced1e2 | 1420 | |
6ff3a151 | 1421 | fdump-unnumbered |
e90afde6 | 1422 | Common Report Var(flag_dump_unnumbered) |
a7b2e184 | 1423 | Suppress output of instruction numbers, line number notes and addresses in debugging dumps. |
6ff3a151 | 1424 | |
2aa7c49b | 1425 | fdump-unnumbered-links |
e90afde6 | 1426 | Common Report Var(flag_dump_unnumbered_links) |
a7b2e184 | 1427 | Suppress output of previous and next insn numbers in debugging dumps. |
2aa7c49b | 1428 | |
b5b8b0ac AO |
1429 | fdwarf2-cfi-asm |
1430 | Common Report Var(flag_dwarf2_cfi_asm) Init(HAVE_GAS_CFI_DIRECTIVE) | |
1431 | Enable CFI tables via GAS assembler directives. | |
1432 | ||
355866de | 1433 | fearly-inlining |
c662432e | 1434 | Common Report Var(flag_early_inlining) Init(1) Optimization |
a7b2e184 | 1435 | Perform early inlining. |
355866de | 1436 | |
de32c0cb | 1437 | feliminate-dwarf2-dups |
1823c4f6 RB |
1438 | Common Ignore |
1439 | Does nothing. Preserved for backward compatibility. | |
de32c0cb | 1440 | |
07ffa034 MJ |
1441 | fipa-sra |
1442 | Common Report Var(flag_ipa_sra) Init(0) Optimization | |
a7b2e184 | 1443 | Perform interprocedural reduction of aggregates. |
07ffa034 | 1444 | |
6a08f7b3 | 1445 | feliminate-unused-debug-symbols |
d1137c02 | 1446 | Common Report Var(flag_debug_only_used_symbols) Init(1) |
a7b2e184 | 1447 | Perform unused symbol elimination in debug info. |
6a08f7b3 | 1448 | |
de32c0cb | 1449 | feliminate-unused-debug-types |
50431bc4 | 1450 | Common Report Var(flag_eliminate_unused_debug_types) Init(1) |
a7b2e184 | 1451 | Perform unused type elimination in debug info. |
de32c0cb | 1452 | |
e713adf6 | 1453 | femit-class-debug-always |
eae8e474 | 1454 | Common Report Var(flag_emit_class_debug_always) Init(0) |
e713adf6 CD |
1455 | Do not suppress C++ class debug information. |
1456 | ||
6ff3a151 | 1457 | fexceptions |
c662432e | 1458 | Common Report Var(flag_exceptions) Optimization |
a7b2e184 | 1459 | Enable exception handling. |
6ff3a151 | 1460 | |
de32c0cb | 1461 | fexpensive-optimizations |
c662432e | 1462 | Common Report Var(flag_expensive_optimizations) Optimization |
a7b2e184 | 1463 | Perform a number of minor, expensive optimizations. |
de32c0cb | 1464 | |
8ce94e44 | 1465 | fexcess-precision= |
df375b03 | 1466 | Common Joined RejectNegative Enum(excess_precision) Var(flag_excess_precision) Init(EXCESS_PRECISION_DEFAULT) Optimization SetByCombined |
a7b2e184 | 1467 | -fexcess-precision=[fast|standard] Specify handling of excess floating-point precision. |
8ce94e44 | 1468 | |
e6d4b984 JM |
1469 | Enum |
1470 | Name(excess_precision) Type(enum excess_precision) UnknownError(unknown excess precision style %qs) | |
1471 | ||
1472 | EnumValue | |
1473 | Enum(excess_precision) String(fast) Value(EXCESS_PRECISION_FAST) | |
1474 | ||
1475 | EnumValue | |
1476 | Enum(excess_precision) String(standard) Value(EXCESS_PRECISION_STANDARD) | |
1477 | ||
04f0fcf7 JG |
1478 | ; Whether we permit the extended set of values for FLT_EVAL_METHOD |
1479 | ; introduced in ISO/IEC TS 18661-3, or limit ourselves to those in C99/C11. | |
1480 | fpermitted-flt-eval-methods= | |
1481 | Common Joined RejectNegative Enum(permitted_flt_eval_methods) Var(flag_permitted_flt_eval_methods) Init(PERMITTED_FLT_EVAL_METHODS_DEFAULT) | |
1482 | -fpermitted-flt-eval-methods=[c11|ts-18661] Specify which values of FLT_EVAL_METHOD are permitted. | |
1483 | ||
1484 | Enum | |
1485 | 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) | |
1486 | ||
1487 | EnumValue | |
1488 | Enum(permitted_flt_eval_methods) String(c11) Value(PERMITTED_FLT_EVAL_METHODS_C11) | |
1489 | ||
1490 | EnumValue | |
1491 | Enum(permitted_flt_eval_methods) String(ts-18661-3) Value(PERMITTED_FLT_EVAL_METHODS_TS_18661) | |
1492 | ||
058de654 | 1493 | ffast-math |
bfd67b47 | 1494 | Common Optimization |
058de654 | 1495 | |
cc8547a7 | 1496 | ffat-lto-objects |
e9f67e62 | 1497 | Common Var(flag_fat_lto_objects) |
cc8547a7 AK |
1498 | Output lto objects containing both the intermediate language and binary output. |
1499 | ||
6ff3a151 | 1500 | ffinite-math-only |
5e46b0c6 | 1501 | Common Report Var(flag_finite_math_only) Optimization SetByCombined |
a7b2e184 | 1502 | Assume no NaNs or infinities are generated. |
6ff3a151 | 1503 | |
c29c92c7 | 1504 | ffinite-loops |
75efe9cb | 1505 | Common Report Var(flag_finite_loops) Optimization Init(0) |
c29c92c7 FX |
1506 | Assume that loops with an exit will terminate and not loop indefinitely. |
1507 | ||
058de654 | 1508 | ffixed- |
21bf1558 | 1509 | Common Joined RejectNegative Var(common_deferred_options) Defer |
a7b2e184 | 1510 | -ffixed-<register> Mark <register> as being unavailable to the compiler. |
058de654 | 1511 | |
de32c0cb | 1512 | ffloat-store |
c662432e | 1513 | Common Report Var(flag_float_store) Optimization |
a7b2e184 | 1514 | Don't allocate floats and doubles in extended-precision registers. |
de32c0cb NB |
1515 | |
1516 | fforce-addr | |
2d2bd949 | 1517 | Common Ignore |
3de5e93a | 1518 | Does nothing. Preserved for backward compatibility. |
de32c0cb | 1519 | |
2ca2b607 SB |
1520 | fforward-propagate |
1521 | Common Report Var(flag_forward_propagate) Optimization | |
a7b2e184 | 1522 | Perform a forward propagation pass on RTL. |
a52b023a | 1523 | |
16949072 | 1524 | ffp-contract= |
bea30e0d | 1525 | Common Joined RejectNegative Enum(fp_contract_mode) Var(flag_fp_contract_mode) Init(FP_CONTRACT_FAST) Optimization |
6a825afe | 1526 | -ffp-contract=[off|on|fast] Perform floating-point expression contraction. |
16949072 | 1527 | |
e6d4b984 JM |
1528 | Enum |
1529 | Name(fp_contract_mode) Type(enum fp_contract_mode) UnknownError(unknown floating point contraction style %qs) | |
1530 | ||
1531 | EnumValue | |
1532 | Enum(fp_contract_mode) String(off) Value(FP_CONTRACT_OFF) | |
1533 | ||
1534 | ; Not implemented, fall back to conservative FP_CONTRACT_OFF. | |
1535 | EnumValue | |
1536 | Enum(fp_contract_mode) String(on) Value(FP_CONTRACT_OFF) | |
1537 | ||
1538 | EnumValue | |
1539 | Enum(fp_contract_mode) String(fast) Value(FP_CONTRACT_FAST) | |
1540 | ||
0d2f700f JM |
1541 | ffp-int-builtin-inexact |
1542 | Common Report Var(flag_fp_int_builtin_inexact) Init(1) Optimization | |
1543 | Allow built-in functions ceil, floor, round, trunc to raise \"inexact\" exceptions. | |
1544 | ||
31b66477 KC |
1545 | ; Nonzero means don't put addresses of constant functions in registers. |
1546 | ; Used for compiling the Unix kernel, where strange substitutions are | |
1547 | ; done on the assembly output. | |
de32c0cb | 1548 | ffunction-cse |
b16650ac | 1549 | Common Report Var(flag_no_function_cse,0) Optimization |
a7b2e184 | 1550 | Allow function addresses to be held in registers. |
de32c0cb | 1551 | |
6ff3a151 | 1552 | ffunction-sections |
50431bc4 | 1553 | Common Report Var(flag_function_sections) |
a7b2e184 | 1554 | Place each function into its own section. |
6ff3a151 | 1555 | |
de32c0cb | 1556 | fgcse |
c662432e | 1557 | Common Report Var(flag_gcse) Optimization |
a7b2e184 | 1558 | Perform global common subexpression elimination. |
de32c0cb NB |
1559 | |
1560 | fgcse-lm | |
c662432e | 1561 | Common Report Var(flag_gcse_lm) Init(1) Optimization |
a7b2e184 | 1562 | Perform enhanced load motion during global common subexpression elimination. |
de32c0cb NB |
1563 | |
1564 | fgcse-sm | |
c662432e | 1565 | Common Report Var(flag_gcse_sm) Init(0) Optimization |
a7b2e184 | 1566 | Perform store motion after global common subexpression elimination. |
de32c0cb | 1567 | |
f5f2e3cd | 1568 | fgcse-las |
c662432e | 1569 | Common Report Var(flag_gcse_las) Init(0) Optimization |
f9957958 | 1570 | Perform redundant load after store elimination in global common subexpression |
a7b2e184 | 1571 | elimination. |
f9957958 MH |
1572 | |
1573 | fgcse-after-reload | |
c662432e | 1574 | Common Report Var(flag_gcse_after_reload) Optimization |
a7b2e184 MS |
1575 | Perform global common subexpression elimination after register allocation has |
1576 | finished. | |
f5f2e3cd | 1577 | |
6592d14b PMR |
1578 | Enum |
1579 | Name(dwarf_gnat_encodings) Type(int) | |
1580 | ||
1581 | EnumValue | |
1582 | Enum(dwarf_gnat_encodings) String(all) Value(DWARF_GNAT_ENCODINGS_ALL) | |
1583 | ||
1584 | EnumValue | |
1585 | Enum(dwarf_gnat_encodings) String(gdb) Value(DWARF_GNAT_ENCODINGS_GDB) | |
1586 | ||
1587 | EnumValue | |
1588 | Enum(dwarf_gnat_encodings) String(minimal) Value(DWARF_GNAT_ENCODINGS_MINIMAL) | |
1589 | ||
1590 | fgnat-encodings= | |
1591 | Common Enum(dwarf_gnat_encodings) Joined RejectNegative Report Undocumented Var(gnat_encodings) | |
04e5c73d | 1592 | -fgnat-encodings=[all|gdb|minimal] Select the balance between GNAT encodings and standard DWARF emitted in the debug information. |
6592d14b | 1593 | |
d0a58904 | 1594 | ; This option is not documented yet as its semantics will change. |
f8bf9252 | 1595 | fgraphite |
ff6a32a9 | 1596 | Common Report Var(flag_graphite) Optimization |
a7b2e184 | 1597 | Enable in and out of Graphite representation. |
f8bf9252 | 1598 | |
204b560f SP |
1599 | fgraphite-identity |
1600 | Common Report Var(flag_graphite_identity) Optimization | |
a7b2e184 | 1601 | Enable Graphite Identity transformation. |
204b560f | 1602 | |
372a6eb8 BS |
1603 | fhoist-adjacent-loads |
1604 | Common Report Var(flag_hoist_adjacent_loads) Optimization | |
1605 | Enable hoisting adjacent loads to encourage generating conditional move | |
a7b2e184 | 1606 | instructions. |
372a6eb8 | 1607 | |
1a218fc9 ILT |
1608 | fkeep-gc-roots-live |
1609 | Common Undocumented Report Var(flag_keep_gc_roots_live) Optimization | |
1610 | ; Always keep a pointer to a live memory block | |
1611 | ||
530b4409 | 1612 | flarge-source-files |
1613 | Common Report Var(flag_large_source_files) Init(0) | |
1614 | Improve GCC's ability to track column numbers in large source files, | |
1615 | at the expense of slower compilation. | |
1616 | ||
3cf0e270 SP |
1617 | floop-parallelize-all |
1618 | Common Report Var(flag_loop_parallelize_all) Optimization | |
a7b2e184 | 1619 | Mark all loops as parallel. |
204b560f | 1620 | |
f8bf9252 | 1621 | floop-strip-mine |
d6bb5ccf | 1622 | Common Alias(floop-nest-optimize) |
a7b2e184 | 1623 | Enable loop nest transforms. Same as -floop-nest-optimize. |
f8bf9252 SP |
1624 | |
1625 | floop-interchange | |
fbdec14e BC |
1626 | Common Report Var(flag_loop_interchange) Optimization |
1627 | Enable loop interchange on trees. | |
f8bf9252 SP |
1628 | |
1629 | floop-block | |
d6bb5ccf | 1630 | Common Alias(floop-nest-optimize) |
a7b2e184 | 1631 | Enable loop nest transforms. Same as -floop-nest-optimize. |
f8bf9252 | 1632 | |
20d3465b | 1633 | floop-unroll-and-jam |
dc236397 MM |
1634 | Common Report Var(flag_unroll_jam) Optimization |
1635 | Perform unroll-and-jam on loops. | |
a7b2e184 | 1636 | |
0a35513e AH |
1637 | fgnu-tm |
1638 | Common Report Var(flag_tm) | |
a7b2e184 | 1639 | Enable support for GNU transactional memory. |
0a35513e | 1640 | |
da34ade5 JM |
1641 | fgnu-unique |
1642 | Common Report Var(flag_gnu_unique) Init(1) | |
a7b2e184 | 1643 | Use STB_GNU_UNIQUE if supported by the assembler. |
da34ade5 | 1644 | |
98af4c9f | 1645 | floop-flatten |
093193be MK |
1646 | Common Ignore |
1647 | Does nothing. Preserved for backward compatibility. | |
98af4c9f | 1648 | |
b60cc080 | 1649 | floop-nest-optimize |
84c36240 | 1650 | Common Report Var(flag_loop_nest_optimize) Optimization |
e357a5e0 | 1651 | Enable the loop nest optimizer. |
b60cc080 | 1652 | |
6a78b724 | 1653 | fstrict-volatile-bitfields |
b16650ac | 1654 | Common Report Var(flag_strict_volatile_bitfields) Init(-1) Optimization |
a7b2e184 | 1655 | Force bitfield accesses to match their type width. |
6a78b724 | 1656 | |
f663d9ad KT |
1657 | fstore-merging |
1658 | Common Report Var(flag_store_merging) Optimization | |
1659 | Merge adjacent stores. | |
1660 | ||
6ff3a151 | 1661 | fguess-branch-probability |
c662432e | 1662 | Common Report Var(flag_guess_branch_prob) Optimization |
a7b2e184 | 1663 | Enable guessing of branch probabilities. |
6ff3a151 | 1664 | |
31b66477 KC |
1665 | ; Nonzero means ignore `#ident' directives. 0 means handle them. |
1666 | ; Generate position-independent code for executables if possible | |
1667 | ; On SVR4 targets, it also controls whether or not to emit a | |
1668 | ; string identifying the compiler. | |
6ff3a151 | 1669 | fident |
50431bc4 | 1670 | Common Report Var(flag_no_ident,0) |
a7b2e184 | 1671 | Process #ident directives. |
6ff3a151 | 1672 | |
de32c0cb | 1673 | fif-conversion |
c662432e | 1674 | Common Report Var(flag_if_conversion) Optimization |
a7b2e184 | 1675 | Perform conversion of conditional jumps to branchless equivalents. |
de32c0cb NB |
1676 | |
1677 | fif-conversion2 | |
c662432e | 1678 | Common Report Var(flag_if_conversion2) Optimization |
a7b2e184 | 1679 | Perform conversion of conditional jumps to conditional execution. |
de32c0cb | 1680 | |
87e2a8fd | 1681 | fstack-reuse= |
082908e3 | 1682 | Common Joined RejectNegative Enum(stack_reuse_level) Var(flag_stack_reuse) Init(SR_ALL) Optimization |
6a825afe | 1683 | -fstack-reuse=[all|named_vars|none] Set stack reuse level for local variables. |
87e2a8fd XDL |
1684 | |
1685 | Enum | |
1686 | Name(stack_reuse_level) Type(enum stack_reuse_level) UnknownError(unknown Stack Reuse Level %qs) | |
1687 | ||
1688 | EnumValue | |
1689 | Enum(stack_reuse_level) String(all) Value(SR_ALL) | |
1690 | ||
1691 | EnumValue | |
1692 | Enum(stack_reuse_level) String(named_vars) Value(SR_NAMED_VARS) | |
1693 | ||
1694 | EnumValue | |
1695 | Enum(stack_reuse_level) String(none) Value(SR_NONE) | |
1696 | ||
384a5197 SP |
1697 | ftree-loop-if-convert |
1698 | Common Report Var(flag_tree_loop_if_convert) Init(-1) Optimization | |
a7b2e184 | 1699 | Convert conditional jumps in innermost loops to branchless equivalents. |
384a5197 | 1700 | |
bd544141 | 1701 | ftree-loop-if-convert-stores |
bef69eb5 RB |
1702 | Common Ignore |
1703 | Does nothing. Preserved for backward compatibility. | |
bd544141 | 1704 | |
31b66477 KC |
1705 | ; -finhibit-size-directive inhibits output of .size for ELF. |
1706 | ; This is used only for compiling crtstuff.c, | |
1707 | ; and it may be extended to other effects | |
1708 | ; needed for crtstuff.c on other systems. | |
6ff3a151 | 1709 | finhibit-size-directive |
50431bc4 | 1710 | Common Report Var(flag_inhibit_size_directive) |
a7b2e184 | 1711 | Do not generate .size directives. |
6ff3a151 | 1712 | |
3e293154 | 1713 | findirect-inlining |
2bf86c84 | 1714 | Common Report Var(flag_indirect_inlining) Optimization |
a7b2e184 | 1715 | Perform indirect inlining. |
3e293154 | 1716 | |
99ea07f8 RG |
1717 | ; General flag to enable inlining. Specifying -fno-inline will disable |
1718 | ; all inlining apart from always-inline functions. | |
de32c0cb | 1719 | finline |
0f042bc5 | 1720 | Common Report Var(flag_no_inline,0) Init(0) Optimization |
a7b2e184 | 1721 | Enable inlining of function declared \"inline\", disabling disables all inlining. |
de32c0cb | 1722 | |
4d4b8cb9 JH |
1723 | finline-small-functions |
1724 | Common Report Var(flag_inline_small_functions) Optimization | |
a7b2e184 | 1725 | Integrate functions into their callers when code size is known not to grow. |
4d4b8cb9 | 1726 | |
de32c0cb | 1727 | finline-functions |
c662432e | 1728 | Common Report Var(flag_inline_functions) Optimization |
a7b2e184 | 1729 | Integrate functions not declared \"inline\" into their callers when profitable. |
de32c0cb | 1730 | |
355866de | 1731 | finline-functions-called-once |
fb37c1de | 1732 | Common Report Var(flag_inline_functions_called_once) Optimization |
a7b2e184 | 1733 | Integrate functions only required by their single caller. |
d63db217 | 1734 | |
d302c9d6 | 1735 | finline-limit- |
5de8299c | 1736 | Common RejectNegative Joined Alias(finline-limit=) |
d302c9d6 NB |
1737 | |
1738 | finline-limit= | |
1739 | Common RejectNegative Joined UInteger | |
a7b2e184 | 1740 | -finline-limit=<number> Limit the size of inlined functions to <number>. |
d302c9d6 | 1741 | |
86951993 AM |
1742 | finline-atomics |
1743 | Common Report Var(flag_inline_atomics) Init(1) Optimization | |
1744 | Inline __atomic operations when a lock free instruction sequence is available. | |
1745 | ||
5c5f0b65 IT |
1746 | fcf-protection |
1747 | Common RejectNegative Alias(fcf-protection=,full) | |
1748 | ||
1749 | fcf-protection= | |
1750 | Common Report Joined RejectNegative Enum(cf_protection_level) Var(flag_cf_protection) Init(CF_NONE) | |
1751 | -fcf-protection=[full|branch|return|none] Instrument functions with checks to verify jump/call/return control-flow transfer | |
1752 | instructions have valid targets. | |
1753 | ||
1754 | Enum | |
cefc0906 | 1755 | Name(cf_protection_level) Type(enum cf_protection_level) UnknownError(unknown Control-Flow Protection Level %qs) |
5c5f0b65 IT |
1756 | |
1757 | EnumValue | |
1758 | Enum(cf_protection_level) String(full) Value(CF_FULL) | |
1759 | ||
1760 | EnumValue | |
1761 | Enum(cf_protection_level) String(branch) Value(CF_BRANCH) | |
1762 | ||
1763 | EnumValue | |
1764 | Enum(cf_protection_level) String(return) Value(CF_RETURN) | |
1765 | ||
1766 | EnumValue | |
1767 | Enum(cf_protection_level) String(none) Value(CF_NONE) | |
1768 | ||
6ff3a151 | 1769 | finstrument-functions |
50431bc4 | 1770 | Common Report Var(flag_instrument_function_entry_exit) |
a7b2e184 | 1771 | Instrument function entry and exit with profiling calls. |
6ff3a151 | 1772 | |
8d5a7d1f ILT |
1773 | finstrument-functions-exclude-function-list= |
1774 | Common RejectNegative Joined | |
b408e010 | 1775 | -finstrument-functions-exclude-function-list=name,... Do not instrument listed functions. |
8d5a7d1f ILT |
1776 | |
1777 | finstrument-functions-exclude-file-list= | |
1778 | Common RejectNegative Joined | |
b408e010 | 1779 | -finstrument-functions-exclude-file-list=filename,... Do not instrument functions listed in files. |
8d5a7d1f | 1780 | |
d6e14e8f | 1781 | fipa-cp |
c662432e | 1782 | Common Report Var(flag_ipa_cp) Optimization |
a7b2e184 | 1783 | Perform interprocedural constant propagation. |
d6e14e8f | 1784 | |
5e45130d JH |
1785 | fipa-cp-clone |
1786 | Common Report Var(flag_ipa_cp_clone) Optimization | |
a7b2e184 | 1787 | Perform cloning to make Interprocedural constant propagation stronger. |
5e45130d | 1788 | |
3c99176a | 1789 | fipa-cp-alignment |
78117646 MJ |
1790 | Common Ignore |
1791 | Does nothing. Preserved for backward compatibility. | |
3c99176a | 1792 | |
209ca542 PK |
1793 | fipa-bit-cp |
1794 | Common Report Var(flag_ipa_bit_cp) Optimization | |
1795 | Perform interprocedural bitwise constant propagation. | |
1796 | ||
e65bb9be JH |
1797 | fipa-profile |
1798 | Common Report Var(flag_ipa_profile) Init(0) Optimization | |
a7b2e184 | 1799 | Perform interprocedural profile propagation. |
ea900239 | 1800 | |
4cf4d6a3 | 1801 | fipa-pta |
c662432e | 1802 | Common Report Var(flag_ipa_pta) Init(0) Optimization |
a7b2e184 | 1803 | Perform interprocedural points-to analysis. |
4cf4d6a3 | 1804 | |
e65bb9be JH |
1805 | fipa-pure-const |
1806 | Common Report Var(flag_ipa_pure_const) Init(0) Optimization | |
a7b2e184 | 1807 | Discover pure and const functions. |
e65bb9be | 1808 | |
b84d4347 ML |
1809 | fipa-icf |
1810 | Common Report Var(flag_ipa_icf) Optimization | |
a7b2e184 | 1811 | Perform Identical Code Folding for functions and read-only variables. |
b84d4347 ML |
1812 | |
1813 | fipa-icf-functions | |
1814 | Common Report Var(flag_ipa_icf_functions) Optimization | |
a7b2e184 | 1815 | Perform Identical Code Folding for functions. |
b84d4347 ML |
1816 | |
1817 | fipa-icf-variables | |
b93ee1bb | 1818 | Common Report Var(flag_ipa_icf_variables) Optimization |
a7b2e184 | 1819 | Perform Identical Code Folding for variables. |
b84d4347 | 1820 | |
ea900239 | 1821 | fipa-reference |
c662432e | 1822 | Common Report Var(flag_ipa_reference) Init(0) Optimization |
2e14744f ML |
1823 | Discover read-only and non addressable static variables. |
1824 | ||
1825 | fipa-reference-addressable | |
1826 | Common Report Var(flag_ipa_reference_addressable) Init(0) Optimization | |
1827 | Discover read-only, write-only and non-addressable static variables. | |
ea900239 | 1828 | |
47b840eb ML |
1829 | fipa-stack-alignment |
1830 | Common Report Var(flag_ipa_stack_alignment) Init(1) Optimization | |
1831 | Reduce stack alignment on call sites if possible. | |
1832 | ||
43d861a5 | 1833 | fipa-matrix-reorg |
04f92ff4 RG |
1834 | Common Ignore |
1835 | Does nothing. Preserved for backward compatibility. | |
43d861a5 | 1836 | |
e1dc98b2 | 1837 | fipa-struct-reorg |
b8beb4d1 RG |
1838 | Common Ignore |
1839 | Does nothing. Preserved for backward compatibility. | |
e1dc98b2 | 1840 | |
8bc5448f KV |
1841 | fipa-vrp |
1842 | Common Report Var(flag_ipa_vrp) Optimization | |
1843 | Perform IPA Value Range Propagation. | |
1844 | ||
058e97ec | 1845 | fira-algorithm= |
b16650ac | 1846 | Common Joined RejectNegative Enum(ira_algorithm) Var(flag_ira_algorithm) Init(IRA_ALGORITHM_CB) Optimization |
6a825afe | 1847 | -fira-algorithm=[CB|priority] Set the used IRA algorithm. |
7db7ed3c | 1848 | |
e6d4b984 JM |
1849 | Enum |
1850 | Name(ira_algorithm) Type(enum ira_algorithm) UnknownError(unknown IRA algorithm %qs) | |
1851 | ||
1852 | EnumValue | |
1853 | Enum(ira_algorithm) String(CB) Value(IRA_ALGORITHM_CB) | |
1854 | ||
1855 | EnumValue | |
1856 | Enum(ira_algorithm) String(priority) Value(IRA_ALGORITHM_PRIORITY) | |
1857 | ||
7db7ed3c | 1858 | fira-region= |
b16650ac | 1859 | Common Joined RejectNegative Enum(ira_region) Var(flag_ira_region) Init(IRA_REGION_AUTODETECT) Optimization |
6a825afe | 1860 | -fira-region=[one|all|mixed] Set regions for IRA. |
058e97ec | 1861 | |
e6d4b984 JM |
1862 | Enum |
1863 | Name(ira_region) Type(enum ira_region) UnknownError(unknown IRA region %qs) | |
1864 | ||
1865 | EnumValue | |
1866 | Enum(ira_region) String(one) Value(IRA_REGION_ONE) | |
1867 | ||
1868 | EnumValue | |
1869 | Enum(ira_region) String(all) Value(IRA_REGION_ALL) | |
1870 | ||
1871 | EnumValue | |
1872 | Enum(ira_region) String(mixed) Value(IRA_REGION_MIXED) | |
1873 | ||
b11f0116 BC |
1874 | fira-hoist-pressure |
1875 | Common Report Var(flag_ira_hoist_pressure) Init(1) Optimization | |
1876 | Use IRA based register pressure calculation | |
1877 | in RTL hoist optimizations. | |
1878 | ||
1833192f | 1879 | fira-loop-pressure |
f3d83ffe | 1880 | Common Report Var(flag_ira_loop_pressure) Optimization |
1833192f VM |
1881 | Use IRA based register pressure calculation |
1882 | in RTL loop optimizations. | |
1883 | ||
058e97ec | 1884 | fira-share-save-slots |
b16650ac | 1885 | Common Report Var(flag_ira_share_save_slots) Init(1) Optimization |
058e97ec VM |
1886 | Share slots for saving different hard registers. |
1887 | ||
1888 | fira-share-spill-slots | |
b16650ac | 1889 | Common Report Var(flag_ira_share_spill_slots) Init(1) Optimization |
058e97ec VM |
1890 | Share stack slots for spilled pseudo-registers. |
1891 | ||
1892 | fira-verbose= | |
5498f011 | 1893 | Common RejectNegative Joined UInteger Var(flag_ira_verbose) Init(5) |
f94e1d66 | 1894 | -fira-verbose=<number> Control IRA's level of diagnostic messages. |
058e97ec | 1895 | |
8b11a64c | 1896 | fivopts |
c662432e | 1897 | Common Report Var(flag_ivopts) Init(1) Optimization |
a7b2e184 | 1898 | Optimize induction variables on trees. |
8b11a64c | 1899 | |
82c0180d | 1900 | fjump-tables |
c662432e | 1901 | Common Var(flag_jump_tables) Init(1) Optimization |
a7b2e184 | 1902 | Use jump tables for sufficiently large switch statements. |
82c0180d | 1903 | |
de32c0cb | 1904 | fkeep-inline-functions |
50431bc4 | 1905 | Common Report Var(flag_keep_inline_functions) |
a7b2e184 | 1906 | Generate code for functions even if they are fully inlined. |
de32c0cb | 1907 | |
787da5fd JV |
1908 | fkeep-static-functions |
1909 | Common Report Var(flag_keep_static_functions) | |
a7b2e184 | 1910 | Generate code for static functions even if they are never called. |
787da5fd | 1911 | |
de32c0cb | 1912 | fkeep-static-consts |
50431bc4 | 1913 | Common Report Var(flag_keep_static_consts) Init(1) |
a7b2e184 | 1914 | Emit static const variables even if they are not used. |
de32c0cb | 1915 | |
6ff3a151 | 1916 | fleading-underscore |
50431bc4 | 1917 | Common Report Var(flag_leading_underscore) Init(-1) |
a7b2e184 | 1918 | Give external symbols a leading underscore. |
6ff3a151 | 1919 | |
efa1cdf0 | 1920 | floop-optimize |
2d2bd949 | 1921 | Common Ignore |
c0220ea4 | 1922 | Does nothing. Preserved for backward compatibility. |
efa1cdf0 | 1923 | |
d9cf932c VM |
1924 | flra-remat |
1925 | Common Report Var(flag_lra_remat) Optimization | |
a7b2e184 | 1926 | Do CFG-sensitive rematerialization in LRA. |
d9cf932c | 1927 | |
d7f09764 | 1928 | flto |
014d92e1 | 1929 | Common |
d7f09764 DN |
1930 | Enable link-time optimization. |
1931 | ||
014d92e1 JH |
1932 | flto= |
1933 | Common RejectNegative Joined Var(flag_lto) | |
1934 | Link-time optimization with number of parallel jobs or jobserver. | |
1935 | ||
783dab6b RB |
1936 | Enum |
1937 | Name(lto_partition_model) Type(enum lto_partition_model) UnknownError(unknown LTO partitioning model %qs) | |
852e4bd2 | 1938 | |
783dab6b RB |
1939 | EnumValue |
1940 | Enum(lto_partition_model) String(none) Value(LTO_PARTITION_NONE) | |
852e4bd2 | 1941 | |
783dab6b RB |
1942 | EnumValue |
1943 | Enum(lto_partition_model) String(one) Value(LTO_PARTITION_ONE) | |
1944 | ||
1945 | EnumValue | |
1946 | Enum(lto_partition_model) String(balanced) Value(LTO_PARTITION_BALANCED) | |
1947 | ||
1948 | EnumValue | |
1949 | Enum(lto_partition_model) String(1to1) Value(LTO_PARTITION_1TO1) | |
1950 | ||
1951 | EnumValue | |
1952 | Enum(lto_partition_model) String(max) Value(LTO_PARTITION_MAX) | |
c3c445e1 | 1953 | |
783dab6b RB |
1954 | flto-partition= |
1955 | Common Joined RejectNegative Enum(lto_partition_model) Var(flag_lto_partition) Init(LTO_PARTITION_BALANCED) | |
a7b2e184 | 1956 | Specify the algorithm to partition symbols and vars at linktime. |
014d92e1 | 1957 | |
d7f09764 DN |
1958 | ; The initial value of -1 comes from Z_DEFAULT_COMPRESSION in zlib.h. |
1959 | flto-compression-level= | |
87741e51 ML |
1960 | Common Joined RejectNegative UInteger Var(flag_lto_compression_level) Init(-1) IntegerRange(0, 19) |
1961 | -flto-compression-level=<number> Use zlib/zstd compression level <number> for IL. | |
d7f09764 | 1962 | |
1ee85ee1 | 1963 | flto-odr-type-merging |
686a56a8 JH |
1964 | Common Ignore |
1965 | Does nothing. Preserved for backward compatibility. | |
1ee85ee1 | 1966 | |
d7f09764 | 1967 | flto-report |
1d67dde8 | 1968 | Common Report Var(flag_lto_report) Init(0) |
a7b2e184 | 1969 | Report various link-time optimization statistics. |
d7f09764 | 1970 | |
057f8f20 AK |
1971 | flto-report-wpa |
1972 | Common Report Var(flag_lto_report_wpa) Init(0) | |
a7b2e184 | 1973 | Report various link-time optimization statistics for WPA only. |
057f8f20 | 1974 | |
6ff3a151 | 1975 | fmath-errno |
5e46b0c6 | 1976 | Common Report Var(flag_errno_math) Init(1) Optimization SetByCombined |
a7b2e184 | 1977 | Set errno after built-in math functions. |
6ff3a151 | 1978 | |
3a789837 NF |
1979 | fmax-errors= |
1980 | Common Joined RejectNegative UInteger Var(flag_max_errors) | |
a7b2e184 | 1981 | -fmax-errors=<number> Maximum number of errors to report. |
3a789837 | 1982 | |
6ff3a151 | 1983 | fmem-report |
50431bc4 | 1984 | Common Report Var(mem_report) |
a7b2e184 | 1985 | Report on permanent memory allocation. |
6ff3a151 | 1986 | |
b3e44629 AK |
1987 | fmem-report-wpa |
1988 | Common Report Var(mem_report_wpa) | |
a7b2e184 | 1989 | Report on permanent memory allocation in WPA only. |
b3e44629 | 1990 | |
31b66477 KC |
1991 | ; This will attempt to merge constant section constants, if 1 only |
1992 | ; string constants and constants from constant pool, if 2 also constant | |
1993 | ; variables. | |
6ff3a151 | 1994 | fmerge-all-constants |
0a7246ee | 1995 | Common Report Var(flag_merge_constants,2) Init(1) |
a7b2e184 | 1996 | Attempt to merge identical constants and constant variables. |
6ff3a151 NB |
1997 | |
1998 | fmerge-constants | |
0a7246ee | 1999 | Common Report Var(flag_merge_constants,1) |
a7b2e184 | 2000 | Attempt to merge identical constants across compilation units. |
6ff3a151 | 2001 | |
28a08168 ILT |
2002 | fmerge-debug-strings |
2003 | Common Report Var(flag_merge_debug_strings) Init(1) | |
a7b2e184 | 2004 | Attempt to merge identical debug strings across compilation units. |
28a08168 | 2005 | |
de32c0cb NB |
2006 | fmessage-length= |
2007 | Common RejectNegative Joined UInteger | |
a7b2e184 | 2008 | -fmessage-length=<number> Limit diagnostics to <number> characters per line. 0 suppresses line-wrapping. |
de32c0cb | 2009 | |
e5626198 | 2010 | fmodulo-sched |
c662432e | 2011 | Common Report Var(flag_modulo_sched) Optimization |
a7b2e184 | 2012 | Perform SMS based modulo scheduling before the first scheduling pass. |
e5626198 | 2013 | |
517d76fa | 2014 | fmodulo-sched-allow-regmoves |
b16650ac | 2015 | Common Report Var(flag_modulo_sched_allow_regmoves) Optimization |
a7b2e184 | 2016 | Perform SMS based modulo scheduling with register moves allowed. |
517d76fa | 2017 | |
5e962776 | 2018 | fmove-loop-invariants |
14379e66 | 2019 | Common Report Var(flag_move_loop_invariants) Optimization |
a7b2e184 | 2020 | Move loop invariant computations out of loops. |
5e962776 | 2021 | |
6fb5fa3c | 2022 | fdce |
6ae4be32 | 2023 | Common Var(flag_dce) Init(1) Optimization |
a7b2e184 | 2024 | Use the RTL dead code elimination pass. |
6fb5fa3c DB |
2025 | |
2026 | fdse | |
c0fe6bce | 2027 | Common Var(flag_dse) Init(0) Optimization |
a7b2e184 | 2028 | Use the RTL dead store elimination pass. |
6fb5fa3c | 2029 | |
d72372e4 | 2030 | freschedule-modulo-scheduled-loops |
c662432e | 2031 | Common Report Var(flag_resched_modulo_sched) Optimization |
a7b2e184 | 2032 | Enable/Disable the traditional scheduling in loops that already passed modulo scheduling. |
d72372e4 | 2033 | |
6ff3a151 | 2034 | fnon-call-exceptions |
c662432e | 2035 | Common Report Var(flag_non_call_exceptions) Optimization |
a7b2e184 | 2036 | Support synchronous non-call exceptions. |
6ff3a151 | 2037 | |
c713ddc0 BS |
2038 | foffload= |
2039 | Common Driver Joined MissingArgError(options or targets missing after %qs) | |
b408e010 | 2040 | -foffload=<targets>=<options> Specify offloading targets and options for them. |
c713ddc0 BS |
2041 | |
2042 | foffload-abi= | |
2043 | Common Joined RejectNegative Enum(offload_abi) Var(flag_offload_abi) Init(OFFLOAD_ABI_UNSET) | |
b408e010 | 2044 | -foffload-abi=[lp64|ilp32] Set the ABI to use in an offload compiler. |
c713ddc0 BS |
2045 | |
2046 | Enum | |
2047 | Name(offload_abi) Type(enum offload_abi) UnknownError(unknown offload ABI %qs) | |
2048 | ||
2049 | EnumValue | |
2050 | Enum(offload_abi) String(ilp32) Value(OFFLOAD_ABI_ILP32) | |
2051 | ||
2052 | EnumValue | |
2053 | Enum(offload_abi) String(lp64) Value(OFFLOAD_ABI_LP64) | |
2054 | ||
de32c0cb | 2055 | fomit-frame-pointer |
c662432e | 2056 | Common Report Var(flag_omit_frame_pointer) Optimization |
a7b2e184 | 2057 | When possible do not generate stack frames. |
de32c0cb | 2058 | |
78c60e3d SS |
2059 | fopt-info |
2060 | Common Report Var(flag_opt_info) Optimization | |
a7b2e184 | 2061 | Enable all optimization info dumps on stderr. |
78c60e3d SS |
2062 | |
2063 | fopt-info- | |
2064 | Common Joined RejectNegative Var(common_deferred_options) Defer | |
a7b2e184 | 2065 | -fopt-info[-<type>=filename] Dump compiler optimization details. |
78c60e3d | 2066 | |
4a4412b9 DM |
2067 | fsave-optimization-record |
2068 | Common Report Var(flag_save_optimization_record) Optimization | |
2069 | Write a SRCFILE.opt-record.json file detailing what optimizations were performed. | |
2070 | ||
6ff3a151 | 2071 | foptimize-register-move |
3b6d1699 VM |
2072 | Common Ignore |
2073 | Does nothing. Preserved for backward compatibility. | |
6ff3a151 | 2074 | |
de32c0cb | 2075 | foptimize-sibling-calls |
c662432e | 2076 | Common Report Var(flag_optimize_sibling_calls) Optimization |
a7b2e184 | 2077 | Optimize sibling and tail recursive calls. |
de32c0cb | 2078 | |
3e485f62 | 2079 | fpartial-inlining |
b16650ac | 2080 | Common Report Var(flag_partial_inlining) Optimization |
a7b2e184 | 2081 | Perform partial inlining. |
3e485f62 | 2082 | |
a5573239 JH |
2083 | fpre-ipa-mem-report |
2084 | Common Report Var(pre_ipa_mem_report) | |
a7b2e184 | 2085 | Report on memory allocation before interprocedural optimization. |
a5573239 JH |
2086 | |
2087 | fpost-ipa-mem-report | |
2088 | Common Report Var(post_ipa_mem_report) | |
a7b2e184 | 2089 | Report on memory allocation before interprocedural optimization. |
a5573239 | 2090 | |
6ff3a151 | 2091 | fpack-struct |
c662432e | 2092 | Common Report Var(flag_pack_struct) Optimization |
a7b2e184 | 2093 | Pack structure members together without holes. |
6ff3a151 | 2094 | |
467cecf3 | 2095 | fpack-struct= |
c662432e | 2096 | Common RejectNegative Joined UInteger Optimization |
a7b2e184 | 2097 | -fpack-struct=<number> Set initial maximum structure member alignment. |
467cecf3 | 2098 | |
de32c0cb | 2099 | fpcc-struct-return |
5498f011 | 2100 | Common Report Var(flag_pcc_struct_return,1) Init(DEFAULT_PCC_STRUCT_RETURN) |
a7b2e184 | 2101 | Return small aggregates in memory, not registers. |
de32c0cb NB |
2102 | |
2103 | fpeel-loops | |
c662432e | 2104 | Common Report Var(flag_peel_loops) Optimization |
a7b2e184 | 2105 | Perform loop peeling. |
de32c0cb NB |
2106 | |
2107 | fpeephole | |
c662432e | 2108 | Common Report Var(flag_no_peephole,0) Optimization |
a7b2e184 | 2109 | Enable machine specific peephole optimizations. |
de32c0cb | 2110 | |
6ff3a151 | 2111 | fpeephole2 |
c662432e | 2112 | Common Report Var(flag_peephole2) Optimization |
a7b2e184 | 2113 | Enable an RTL peephole pass before sched2. |
6ff3a151 | 2114 | |
31b66477 | 2115 | fPIC |
b57e6e18 | 2116 | Common Report Var(flag_pic,2) Negative(fPIE) Init(-1) |
a7b2e184 | 2117 | Generate position-independent code if possible (large mode). |
31b66477 KC |
2118 | |
2119 | fPIE | |
428b3812 | 2120 | Common Report Var(flag_pie,2) Negative(fpic) Init(-1) |
a7b2e184 | 2121 | Generate position-independent code for executables if possible (large mode). |
31b66477 | 2122 | |
6ff3a151 | 2123 | fpic |
b57e6e18 | 2124 | Common Report Var(flag_pic,1) Negative(fpie) Init(-1) |
a7b2e184 | 2125 | Generate position-independent code if possible (small mode). |
6ff3a151 NB |
2126 | |
2127 | fpie | |
428b3812 | 2128 | Common Report Var(flag_pie,1) Negative(fPIC) Init(-1) |
a7b2e184 | 2129 | Generate position-independent code for executables if possible (small mode). |
6ff3a151 | 2130 | |
b91fd3c7 AM |
2131 | fplt |
2132 | Common Report Var(flag_plt) Init(1) Optimization | |
a7b2e184 | 2133 | Use PLT for PIC calls (-fno-plt: load the address from GOT at call site). |
b91fd3c7 | 2134 | |
68a607d8 | 2135 | fplugin= |
21bf1558 | 2136 | Common Joined RejectNegative Var(common_deferred_options) Defer |
a7b2e184 | 2137 | Specify a plugin to load. |
68a607d8 DN |
2138 | |
2139 | fplugin-arg- | |
21bf1558 | 2140 | Common Joined RejectNegative Var(common_deferred_options) Defer |
a7b2e184 | 2141 | -fplugin-arg-<name>-<key>[=<value>] Specify argument <key>=<value> for plugin <name>. |
68a607d8 | 2142 | |
bbc8a8dc | 2143 | fpredictive-commoning |
6ae4be32 | 2144 | Common Report Var(flag_predictive_commoning) Optimization |
bbc8a8dc ZD |
2145 | Run predictive commoning optimization. |
2146 | ||
de32c0cb | 2147 | fprefetch-loop-arrays |
1fbb509a | 2148 | Common Report Var(flag_prefetch_loop_arrays) Init(-1) Optimization |
a7b2e184 | 2149 | Generate prefetch instructions, if available, for arrays in loops. |
de32c0cb | 2150 | |
6ff3a151 | 2151 | fprofile |
50431bc4 | 2152 | Common Report Var(profile_flag) |
a7b2e184 | 2153 | Enable basic program profiling code. |
6ff3a151 | 2154 | |
676519f7 BE |
2155 | fprofile-abs-path |
2156 | Common Report Var(profile_abs_path_flag) | |
2157 | Generate absolute source path names for gcov. | |
2158 | ||
6ff3a151 | 2159 | fprofile-arcs |
50431bc4 | 2160 | Common Report Var(profile_arc_flag) |
a7b2e184 | 2161 | Insert arc-based program profiling code. |
6ff3a151 | 2162 | |
2f908293 | 2163 | fprofile-dir= |
0576d21f | 2164 | Common Joined RejectNegative Var(profile_data_prefix) |
2f908293 SP |
2165 | Set the top-level directory for storing the profile data. |
2166 | The default is 'pwd'. | |
2167 | ||
8e37c995 ML |
2168 | fprofile-note= |
2169 | Common Joined RejectNegative Var(profile_note_location) | |
2170 | Select the name for storing the profile note file. | |
2171 | ||
52c76998 PY |
2172 | fprofile-correction |
2173 | Common Report Var(flag_profile_correction) | |
a7b2e184 | 2174 | Enable correction of flow inconsistent profile data input. |
52c76998 | 2175 | |
22063dbc ML |
2176 | fprofile-update= |
2177 | Common Joined RejectNegative Enum(profile_update) Var(flag_profile_update) Init(PROFILE_UPDATE_SINGLE) | |
4d209853 | 2178 | -fprofile-update=[single|atomic|prefer-atomic] Set the profile update method. |
22063dbc | 2179 | |
e18240ff ML |
2180 | fprofile-filter-files= |
2181 | Common Joined RejectNegative Var(flag_profile_filter_files) | |
2182 | Instrument only functions from files where names match any regular expression (separated by a semi-colon). | |
2183 | ||
2184 | fprofile-exclude-files= | |
2185 | Common Joined RejectNegative Var(flag_profile_exclude_files) | |
2186 | Instrument only functions from files where names do not match all the regular expressions (separated by a semi-colon). | |
2187 | ||
ea0b1252 ML |
2188 | Enum |
2189 | Name(profile_reproducibility) Type(enum profile_reproducibility) UnknownError(unknown profile reproducibility method %qs) | |
2190 | ||
2191 | EnumValue | |
2192 | Enum(profile_reproducibility) String(serial) Value(PROFILE_REPRODUCIBILITY_SERIAL) | |
2193 | ||
2194 | EnumValue | |
2195 | Enum(profile_reproducibility) String(parallel-runs) Value(PROFILE_REPRODUCIBILITY_PARALLEL_RUNS) | |
2196 | ||
2197 | EnumValue | |
2198 | Enum(profile_reproducibility) String(multithreaded) Value(PROFILE_REPRODUCIBILITY_MULTITHREADED) | |
2199 | ||
2200 | fprofile-reproducible | |
2201 | Common Joined RejectNegative Var(flag_profile_reproducible) Enum(profile_reproducibility) Init(PROFILE_REPRODUCIBILITY_SERIAL) | |
b408e010 | 2202 | -fprofile-reproducible=[serial|parallel-runs|multithreaded] Control level of reproducibility of profile gathered by -fprofile-generate. |
ea0b1252 | 2203 | |
22063dbc ML |
2204 | Enum |
2205 | Name(profile_update) Type(enum profile_update) UnknownError(unknown profile update method %qs) | |
2206 | ||
2207 | EnumValue | |
2208 | Enum(profile_update) String(single) Value(PROFILE_UPDATE_SINGLE) | |
2209 | ||
2210 | EnumValue | |
2211 | Enum(profile_update) String(atomic) Value(PROFILE_UPDATE_ATOMIC) | |
2212 | ||
4d209853 ML |
2213 | EnumValue |
2214 | Enum(profile_update) String(prefer-atomic) Value(PROFILE_UPDATE_PREFER_ATOMIC) | |
2215 | ||
44b32683 JH |
2216 | fprofile-prefix-path= |
2217 | Common Joined RejectNegative Var(profile_prefix_path) | |
850322df | 2218 | Remove prefix from absolute path before mangling name for -fprofile-generate= and -fprofile-use=. |
44b32683 | 2219 | |
a8a5f53a JH |
2220 | fprofile-generate |
2221 | Common | |
a7b2e184 | 2222 | Enable common options for generating profile info for profile feedback directed optimizations. |
a8a5f53a | 2223 | |
2f908293 SP |
2224 | fprofile-generate= |
2225 | Common Joined RejectNegative | |
a7b2e184 | 2226 | Enable common options for generating profile info for profile feedback directed optimizations, and set -fprofile-dir=. |
2f908293 | 2227 | |
34fbe3f0 JH |
2228 | fprofile-partial-training |
2229 | Common Report Var(flag_profile_partial_training) Optimization | |
c86b722b | 2230 | Do not assume that functions never executed during the train run are cold. |
34fbe3f0 | 2231 | |
a8a5f53a | 2232 | fprofile-use |
2f908293 | 2233 | Common Var(flag_profile_use) |
a7b2e184 | 2234 | Enable common options for performing profile feedback directed optimizations. |
a8a5f53a | 2235 | |
2f908293 SP |
2236 | fprofile-use= |
2237 | Common Joined RejectNegative | |
a7b2e184 | 2238 | Enable common options for performing profile feedback directed optimizations, and set -fprofile-dir=. |
2f908293 | 2239 | |
fca9dc00 | 2240 | fprofile-values |
50431bc4 | 2241 | Common Report Var(flag_profile_values) |
a7b2e184 | 2242 | Insert code to profile values of expressions. |
fca9dc00 | 2243 | |
37e5402b JH |
2244 | fprofile-report |
2245 | Common Report Var(profile_report) | |
a7b2e184 | 2246 | Report on consistency of profile. |
37e5402b | 2247 | |
9cec31f4 | 2248 | fprofile-reorder-functions |
ad74bc8c | 2249 | Common Report Var(flag_profile_reorder_functions) Optimization |
a7b2e184 | 2250 | Enable function reordering that improves code placement. |
9cec31f4 | 2251 | |
417ca011 TD |
2252 | fpatchable-function-entry= |
2253 | Common Joined Optimization | |
2254 | Insert NOP instructions at each function entry. | |
2255 | ||
de32c0cb | 2256 | frandom-seed |
299404a1 | 2257 | Common Var(common_deferred_options) Defer |
de32c0cb NB |
2258 | |
2259 | frandom-seed= | |
299404a1 | 2260 | Common Joined RejectNegative Var(common_deferred_options) Defer |
4bfede85 | 2261 | -frandom-seed=<string> Make compile reproducible using <string>. |
de32c0cb | 2262 | |
e0d9d0dd NC |
2263 | ; This switch causes the command line that was used to create an |
2264 | ; object file to be recorded into the object file. The exact format | |
2265 | ; of this recording is target and binary file format dependent. | |
2266 | ; It is related to the -fverbose-asm switch, but that switch only | |
2267 | ; records information in the assembler output file as comments, so | |
2268 | ; they never reach the object file. | |
2269 | frecord-gcc-switches | |
2270 | Common Report Var(flag_record_gcc_switches) | |
2271 | Record gcc command line switches in the object file. | |
2272 | ||
de32c0cb | 2273 | freg-struct-return |
f0036cca | 2274 | Common Report Var(flag_pcc_struct_return,0) Optimization |
a7b2e184 | 2275 | Return small aggregates in registers. |
de32c0cb | 2276 | |
6ff3a151 | 2277 | fregmove |
3b6d1699 VM |
2278 | Common Ignore |
2279 | Does nothing. Preserved for backward compatibility. | |
6ff3a151 | 2280 | |
f522930c | 2281 | flifetime-dse |
a021961c | 2282 | Common Report Var(flag_lifetime_dse,2) Init(2) Optimization |
f522930c JM |
2283 | Tell DSE that the storage for a C++ object is dead when the constructor |
2284 | starts and when the destructor finishes. | |
2285 | ||
a021961c | 2286 | flifetime-dse= |
63010089 | 2287 | Common Joined RejectNegative UInteger Var(flag_lifetime_dse) Optimization IntegerRange(0, 2) |
a021961c | 2288 | |
6fd6a2ff QZ |
2289 | flive-patching |
2290 | Common RejectNegative Alias(flive-patching=,inline-clone) Optimization | |
2291 | ||
2292 | flive-patching= | |
2293 | Common Report Joined RejectNegative Enum(live_patching_level) Var(flag_live_patching) Init(LIVE_PATCHING_NONE) Optimization | |
2294 | -flive-patching=[inline-only-static|inline-clone] Control IPA | |
2295 | optimizations to provide a safe compilation for live-patching. At the same | |
2296 | time, provides multiple-level control on the enabled IPA optimizations. | |
2297 | ||
2298 | Enum | |
2299 | Name(live_patching_level) Type(enum live_patching_level) UnknownError(unknown Live-Patching Level %qs) | |
2300 | ||
2301 | EnumValue | |
2302 | Enum(live_patching_level) String(inline-only-static) Value(LIVE_PATCHING_INLINE_ONLY_STATIC) | |
2303 | ||
2304 | EnumValue | |
2305 | Enum(live_patching_level) String(inline-clone) Value(LIVE_PATCHING_INLINE_CLONE) | |
2306 | ||
6343b6bf ML |
2307 | fallocation-dce |
2308 | Common Report Var(flag_allocation_dce) Init(1) Optimization | |
2309 | Tell DCE to remove unused C++ allocations. | |
2310 | ||
f20f2613 VM |
2311 | flive-range-shrinkage |
2312 | Common Report Var(flag_live_range_shrinkage) Init(0) Optimization | |
a7b2e184 | 2313 | Relief of register pressure through live range shrinkage. |
f20f2613 | 2314 | |
6ff3a151 | 2315 | frename-registers |
c662432e | 2316 | Common Report Var(flag_rename_registers) Init(2) Optimization |
a7b2e184 | 2317 | Perform a register renaming optimization pass. |
6ff3a151 | 2318 | |
b16abbcb BC |
2319 | fschedule-fusion |
2320 | Common Report Var(flag_schedule_fusion) Init(2) Optimization | |
a7b2e184 | 2321 | Perform a target dependent instruction fusion optimization pass. |
b16abbcb | 2322 | |
6ff3a151 | 2323 | freorder-blocks |
c662432e | 2324 | Common Report Var(flag_reorder_blocks) Optimization |
a7b2e184 | 2325 | Reorder basic blocks to improve code placement. |
6ff3a151 | 2326 | |
59faab7c SB |
2327 | freorder-blocks-algorithm= |
2328 | Common Joined RejectNegative Enum(reorder_blocks_algorithm) Var(flag_reorder_blocks_algorithm) Init(REORDER_BLOCKS_ALGORITHM_SIMPLE) Optimization | |
6a825afe | 2329 | -freorder-blocks-algorithm=[simple|stc] Set the used basic block reordering algorithm. |
59faab7c SB |
2330 | |
2331 | Enum | |
2332 | Name(reorder_blocks_algorithm) Type(enum reorder_blocks_algorithm) UnknownError(unknown basic block reordering algorithm %qs) | |
2333 | ||
2334 | EnumValue | |
2335 | Enum(reorder_blocks_algorithm) String(simple) Value(REORDER_BLOCKS_ALGORITHM_SIMPLE) | |
2336 | ||
2337 | EnumValue | |
2338 | Enum(reorder_blocks_algorithm) String(stc) Value(REORDER_BLOCKS_ALGORITHM_STC) | |
2339 | ||
750054a2 | 2340 | freorder-blocks-and-partition |
c662432e | 2341 | Common Report Var(flag_reorder_blocks_and_partition) Optimization |
a7b2e184 | 2342 | Reorder basic blocks and partition into hot and cold sections. |
750054a2 | 2343 | |
6ff3a151 | 2344 | freorder-functions |
c662432e | 2345 | Common Report Var(flag_reorder_functions) Optimization |
a7b2e184 | 2346 | Reorder functions to improve code placement. |
6ff3a151 | 2347 | |
de32c0cb | 2348 | frerun-cse-after-loop |
3020190e | 2349 | Common Report Var(flag_rerun_cse_after_loop) Optimization |
a7b2e184 | 2350 | Add a common subexpression elimination pass after loop optimizations. |
de32c0cb | 2351 | |
efa1cdf0 | 2352 | frerun-loop-opt |
2d2bd949 | 2353 | Common Ignore |
c0220ea4 | 2354 | Does nothing. Preserved for backward compatibility. |
efa1cdf0 | 2355 | |
039c3d42 | 2356 | frounding-math |
5e46b0c6 | 2357 | Common Report Var(flag_rounding_math) Optimization SetByCombined |
a7b2e184 | 2358 | Disable optimizations that assume default FP rounding behavior. |
039c3d42 | 2359 | |
6ff3a151 | 2360 | fsched-interblock |
c662432e | 2361 | Common Report Var(flag_schedule_interblock) Init(1) Optimization |
a7b2e184 | 2362 | Enable scheduling across basic blocks. |
6ff3a151 | 2363 | |
ce18efcb VM |
2364 | fsched-pressure |
2365 | Common Report Var(flag_sched_pressure) Init(0) Optimization | |
a7b2e184 | 2366 | Enable register pressure sensitive insn scheduling. |
ce18efcb | 2367 | |
6ff3a151 | 2368 | fsched-spec |
c662432e | 2369 | Common Report Var(flag_schedule_speculative) Init(1) Optimization |
a7b2e184 | 2370 | Allow speculative motion of non-loads. |
6ff3a151 NB |
2371 | |
2372 | fsched-spec-load | |
c662432e | 2373 | Common Report Var(flag_schedule_speculative_load) Optimization |
a7b2e184 | 2374 | Allow speculative motion of some loads. |
6ff3a151 NB |
2375 | |
2376 | fsched-spec-load-dangerous | |
c662432e | 2377 | Common Report Var(flag_schedule_speculative_load_dangerous) Optimization |
a7b2e184 | 2378 | Allow speculative motion of more loads. |
6ff3a151 | 2379 | |
de32c0cb | 2380 | fsched-verbose= |
4111f1c9 | 2381 | Common RejectNegative Joined UInteger Var(sched_verbose_param) Init(1) |
a7b2e184 | 2382 | -fsched-verbose=<number> Set the verbosity level of the scheduler. |
de32c0cb | 2383 | |
6ff3a151 | 2384 | fsched2-use-superblocks |
c662432e | 2385 | Common Report Var(flag_sched2_use_superblocks) Optimization |
a7b2e184 | 2386 | If scheduling post reload, do superblock scheduling. |
6ff3a151 NB |
2387 | |
2388 | fsched2-use-traces | |
2d2bd949 | 2389 | Common Ignore |
57257f0d | 2390 | Does nothing. Preserved for backward compatibility. |
6ff3a151 | 2391 | |
de32c0cb | 2392 | fschedule-insns |
c662432e | 2393 | Common Report Var(flag_schedule_insns) Optimization |
a7b2e184 | 2394 | Reschedule instructions before register allocation. |
de32c0cb NB |
2395 | |
2396 | fschedule-insns2 | |
c662432e | 2397 | Common Report Var(flag_schedule_insns_after_reload) Optimization |
a7b2e184 | 2398 | Reschedule instructions after register allocation. |
de32c0cb | 2399 | |
e855c69d AB |
2400 | ; This flag should be on when a target implements non-trivial |
2401 | ; scheduling hooks, maybe saving some information for its own sake. | |
a7b2e184 | 2402 | ; On IA64, for example, this is used for correct bundling. |
e855c69d AB |
2403 | fselective-scheduling |
2404 | Common Report Var(flag_selective_scheduling) Optimization | |
a7b2e184 | 2405 | Schedule instructions using selective scheduling algorithm. |
e855c69d AB |
2406 | |
2407 | fselective-scheduling2 | |
a7b2e184 MS |
2408 | Common Report Var(flag_selective_scheduling2) Optimization |
2409 | Run selective scheduling after reload. | |
e855c69d | 2410 | |
ecfc21ff DM |
2411 | fself-test= |
2412 | Common Undocumented Joined Var(flag_self_test) | |
2413 | Run self-tests, using the given path to locate test files. | |
d9b950dd | 2414 | |
e855c69d AB |
2415 | fsel-sched-pipelining |
2416 | Common Report Var(flag_sel_sched_pipelining) Init(0) Optimization | |
a7b2e184 | 2417 | Perform software pipelining of inner loops during selective scheduling. |
e855c69d AB |
2418 | |
2419 | fsel-sched-pipelining-outer-loops | |
2420 | Common Report Var(flag_sel_sched_pipelining_outer_loops) Init(0) Optimization | |
a7b2e184 | 2421 | Perform software pipelining of outer loops during selective scheduling. |
e855c69d AB |
2422 | |
2423 | fsel-sched-reschedule-pipelined | |
2424 | Common Report Var(flag_sel_sched_reschedule_pipelined) Init(0) Optimization | |
a7b2e184 | 2425 | Reschedule pipelined regions without pipelining. |
e855c69d | 2426 | |
e288a46c JH |
2427 | fsemantic-interposition |
2428 | Common Report Var(flag_semantic_interposition) Init(1) | |
a7b2e184 | 2429 | Allow interposing function (or variables) by ones with different semantics (or initializer) respectively by dynamic linker. |
e288a46c | 2430 | |
31b66477 KC |
2431 | ; sched_stalled_insns means that insns can be moved prematurely from the queue |
2432 | ; of stalled insns into the ready list. | |
569fa502 | 2433 | fsched-stalled-insns |
ab442df7 | 2434 | Common Report Var(flag_sched_stalled_insns) Optimization UInteger |
a7b2e184 | 2435 | Allow premature scheduling of queued insns. |
569fa502 DN |
2436 | |
2437 | fsched-stalled-insns= | |
b16650ac | 2438 | Common RejectNegative Joined UInteger Optimization |
a7b2e184 | 2439 | -fsched-stalled-insns=<number> Set number of queued insns that can be prematurely scheduled. |
569fa502 | 2440 | |
31b66477 KC |
2441 | ; sched_stalled_insns_dep controls how many recently scheduled cycles will |
2442 | ; be examined for a dependency on a stalled insn that is candidate for | |
2443 | ; premature removal from the queue of stalled insns into the ready list (has | |
2444 | ; an effect only if the flag 'sched_stalled_insns' is set). | |
569fa502 | 2445 | fsched-stalled-insns-dep |
ab442df7 | 2446 | Common Report Var(flag_sched_stalled_insns_dep,1) Init(1) Optimization UInteger |
a7b2e184 | 2447 | Set dependence distance checking in premature scheduling of queued insns. |
569fa502 DN |
2448 | |
2449 | fsched-stalled-insns-dep= | |
b16650ac | 2450 | Common RejectNegative Joined UInteger Optimization |
a7b2e184 | 2451 | -fsched-stalled-insns-dep=<number> Set dependence distance checking in premature scheduling of queued insns. |
569fa502 | 2452 | |
ee4764a8 GS |
2453 | fsched-group-heuristic |
2454 | Common Report Var(flag_sched_group_heuristic) Init(1) Optimization | |
a7b2e184 | 2455 | Enable the group heuristic in the scheduler. |
ee4764a8 GS |
2456 | |
2457 | fsched-critical-path-heuristic | |
2458 | Common Report Var(flag_sched_critical_path_heuristic) Init(1) Optimization | |
a7b2e184 | 2459 | Enable the critical path heuristic in the scheduler. |
ee4764a8 GS |
2460 | |
2461 | fsched-spec-insn-heuristic | |
2462 | Common Report Var(flag_sched_spec_insn_heuristic) Init(1) Optimization | |
a7b2e184 | 2463 | Enable the speculative instruction heuristic in the scheduler. |
ee4764a8 | 2464 | |
ee4764a8 GS |
2465 | fsched-rank-heuristic |
2466 | Common Report Var(flag_sched_rank_heuristic) Init(1) Optimization | |
a7b2e184 | 2467 | Enable the rank heuristic in the scheduler. |
ee4764a8 GS |
2468 | |
2469 | fsched-last-insn-heuristic | |
2470 | Common Report Var(flag_sched_last_insn_heuristic) Init(1) Optimization | |
a7b2e184 | 2471 | Enable the last instruction heuristic in the scheduler. |
ee4764a8 GS |
2472 | |
2473 | fsched-dep-count-heuristic | |
2474 | Common Report Var(flag_sched_dep_count_heuristic) Init(1) Optimization | |
a7b2e184 | 2475 | Enable the dependent count heuristic in the scheduler. |
ee4764a8 | 2476 | |
aacd3885 | 2477 | fsection-anchors |
c662432e | 2478 | Common Report Var(flag_section_anchors) Optimization |
a7b2e184 | 2479 | Access data in the same section from shared anchor points. |
aacd3885 | 2480 | |
8cd37d0b | 2481 | fsee |
2d2bd949 | 2482 | Common Ignore |
8393a9c8 | 2483 | Does nothing. Preserved for backward compatibility. |
8cd37d0b | 2484 | |
87a0ebfd | 2485 | fzee |
26cd9add EI |
2486 | Common Ignore |
2487 | Does nothing. Preserved for backward compatibility. | |
2488 | ||
2489 | free | |
a86689f5 | 2490 | Common Report Var(flag_ree) Init(0) Optimization |
26cd9add | 2491 | Turn on Redundant Extensions Elimination pass. |
87a0ebfd | 2492 | |
8abb6b22 | 2493 | fshow-column |
1cb42611 | 2494 | Common Report Var(flag_show_column) Init(1) |
a7b2e184 | 2495 | Show column numbers in diagnostics, when available. Default on. |
8abb6b22 | 2496 | |
484db665 BS |
2497 | fshrink-wrap |
2498 | Common Report Var(flag_shrink_wrap) Optimization | |
2499 | Emit function prologues only before parts of the function that need it, | |
2500 | rather than at the top of the function. | |
2501 | ||
20a6ece0 SB |
2502 | fshrink-wrap-separate |
2503 | Common Report Var(flag_shrink_wrap_separate) Init(1) Optimization | |
2504 | Shrink-wrap parts of the prologue and epilogue separately. | |
2505 | ||
6ff3a151 | 2506 | fsignaling-nans |
5e46b0c6 | 2507 | Common Report Var(flag_signaling_nans) Optimization SetByCombined |
a7b2e184 | 2508 | Disable optimizations observable by IEEE signaling NaNs. |
6ff3a151 | 2509 | |
db02da79 | 2510 | fsigned-zeros |
5e46b0c6 | 2511 | Common Report Var(flag_signed_zeros) Init(1) Optimization SetByCombined |
a7b2e184 | 2512 | Disable floating point optimizations that ignore the IEEE signedness of zero. |
db02da79 | 2513 | |
6ff3a151 | 2514 | fsingle-precision-constant |
c662432e | 2515 | Common Report Var(flag_single_precision_constant) Optimization |
a7b2e184 | 2516 | Convert floating point constants to single precision constants. |
6ff3a151 | 2517 | |
113d659a | 2518 | fsplit-ivs-in-unroller |
c662432e | 2519 | Common Report Var(flag_split_ivs_in_unroller) Init(1) Optimization |
a7b2e184 | 2520 | Split lifetimes of induction variables when loops are unrolled. |
113d659a | 2521 | |
7458026b ILT |
2522 | fsplit-stack |
2523 | Common Report Var(flag_split_stack) Init(-1) | |
a7b2e184 | 2524 | Generate discontiguous stack frames. |
7458026b | 2525 | |
e53a16e7 | 2526 | fsplit-wide-types |
21af5cdf | 2527 | Common Report Var(flag_split_wide_types) Optimization |
a7b2e184 | 2528 | Split wide types into independent registers. |
e53a16e7 | 2529 | |
b18081df SB |
2530 | fsplit-wide-types-early |
2531 | Common Report Var(flag_split_wide_types_early) Optimization | |
2532 | Split wide types into independent registers earlier. | |
2533 | ||
6a75d560 RS |
2534 | fssa-backprop |
2535 | Common Report Var(flag_ssa_backprop) Init(1) Optimization | |
2536 | Enable backward propagation of use properties at the SSA level. | |
2537 | ||
68f6df73 RB |
2538 | fssa-phiopt |
2539 | Common Report Var(flag_ssa_phiopt) Optimization | |
a7b2e184 | 2540 | Optimize conditional patterns using SSA PHI nodes. |
68f6df73 | 2541 | |
98ce9490 TV |
2542 | fstdarg-opt |
2543 | Common Report Var(flag_stdarg_opt) Init(1) Optimization | |
a7b2e184 | 2544 | Optimize amount of stdarg registers saved to stack at start of function. |
98ce9490 | 2545 | |
f37a4f14 | 2546 | fvariable-expansion-in-unroller |
c662432e | 2547 | Common Report Var(flag_variable_expansion_in_unroller) Optimization |
a7b2e184 | 2548 | Apply variable expansion when loops are unrolled. |
f37a4f14 | 2549 | |
b38f3813 | 2550 | fstack-check= |
ee8f15c6 | 2551 | Common Report RejectNegative Joined Optimization |
a7b2e184 | 2552 | -fstack-check=[no|generic|specific] Insert stack checking code into the program. |
b38f3813 | 2553 | |
6ff3a151 | 2554 | fstack-check |
5de8299c | 2555 | Common Alias(fstack-check=, specific, no) |
a7b2e184 | 2556 | Insert stack checking code into the program. Same as -fstack-check=specific. |
6ff3a151 | 2557 | |
ee8f15c6 JL |
2558 | fstack-clash-protection |
2559 | Common Report Var(flag_stack_clash_protection) Optimization | |
2560 | Insert code to probe each page of stack space as it is allocated to protect | |
2561 | from stack-clash style attacks. | |
2562 | ||
de32c0cb | 2563 | fstack-limit |
21bf1558 | 2564 | Common Var(common_deferred_options) Defer |
de32c0cb | 2565 | |
058de654 | 2566 | fstack-limit-register= |
21bf1558 | 2567 | Common RejectNegative Joined Var(common_deferred_options) Defer |
a7b2e184 | 2568 | -fstack-limit-register=<register> Trap if the stack goes past <register>. |
058de654 NB |
2569 | |
2570 | fstack-limit-symbol= | |
21bf1558 | 2571 | Common RejectNegative Joined Var(common_deferred_options) Defer |
a7b2e184 | 2572 | -fstack-limit-symbol=<name> Trap if the stack goes past symbol <name>. |
058de654 | 2573 | |
7d69de61 | 2574 | fstack-protector |
5c846a81 | 2575 | Common Report Var(flag_stack_protect, 1) Init(-1) Optimization |
a7b2e184 | 2576 | Use propolice as a stack protection method. |
7d69de61 RH |
2577 | |
2578 | fstack-protector-all | |
5c846a81 | 2579 | Common Report RejectNegative Var(flag_stack_protect, 2) Init(-1) Optimization |
a7b2e184 | 2580 | Use a stack protection method for every function. |
7d69de61 | 2581 | |
f6bc1c4a | 2582 | fstack-protector-strong |
5c846a81 | 2583 | Common Report RejectNegative Var(flag_stack_protect, 3) Init(-1) Optimization |
a7b2e184 | 2584 | Use a smart stack protection method for certain functions. |
f6bc1c4a | 2585 | |
5434dc07 | 2586 | fstack-protector-explicit |
5c846a81 | 2587 | Common Report RejectNegative Var(flag_stack_protect, 4) Optimization |
a7b2e184 | 2588 | Use stack protection method only for functions with the stack_protect attribute. |
5434dc07 | 2589 | |
d3c12306 EB |
2590 | fstack-usage |
2591 | Common RejectNegative Var(flag_stack_usage) | |
a7b2e184 | 2592 | Output stack usage information on a per-function basis. |
d3c12306 | 2593 | |
de32c0cb | 2594 | fstrength-reduce |
2d2bd949 | 2595 | Common Ignore |
c0220ea4 | 2596 | Does nothing. Preserved for backward compatibility. |
de32c0cb | 2597 | |
31b66477 KC |
2598 | ; Nonzero if we should do (language-dependent) alias analysis. |
2599 | ; Typically, this analysis will assume that expressions of certain | |
2600 | ; types do not alias expressions of certain other types. Only used | |
2601 | ; if alias analysis (in general) is enabled. | |
6ff3a151 | 2602 | fstrict-aliasing |
c662432e | 2603 | Common Report Var(flag_strict_aliasing) Optimization |
a7b2e184 | 2604 | Assume strict aliasing rules apply. |
6ff3a151 | 2605 | |
eeef0e45 | 2606 | fstrict-overflow |
3fccbb9e JJ |
2607 | Common Report |
2608 | Treat signed overflow as undefined. Negated as -fwrapv -fwrapv-pointer. | |
eeef0e45 | 2609 | |
e8053cf5 RH |
2610 | fsync-libcalls |
2611 | Common Report Var(flag_sync_libcalls) Init(1) | |
a7b2e184 | 2612 | Implement __atomic operations via libcalls to legacy __sync functions. |
e8053cf5 | 2613 | |
de32c0cb | 2614 | fsyntax-only |
50431bc4 | 2615 | Common Report Var(flag_syntax_only) |
a7b2e184 | 2616 | Check for syntax errors, then stop. |
de32c0cb | 2617 | |
6ff3a151 | 2618 | ftest-coverage |
50431bc4 | 2619 | Common Report Var(flag_test_coverage) |
a7b2e184 | 2620 | Create data files needed by \"gcov\". |
6ff3a151 | 2621 | |
de32c0cb | 2622 | fthread-jumps |
c662432e | 2623 | Common Report Var(flag_thread_jumps) Optimization |
a7b2e184 | 2624 | Perform jump threading optimizations. |
de32c0cb | 2625 | |
6ff3a151 | 2626 | ftime-report |
50431bc4 | 2627 | Common Report Var(time_report) |
a7b2e184 | 2628 | Report the time taken by each compiler pass. |
6ff3a151 | 2629 | |
8df06bd0 RB |
2630 | ftime-report-details |
2631 | Common Report Var(time_report_details) | |
2632 | Record times taken by sub-phases separately. | |
2633 | ||
058de654 | 2634 | ftls-model= |
e6d4b984 | 2635 | Common Joined RejectNegative Enum(tls_model) Var(flag_tls_default) Init(TLS_MODEL_GLOBAL_DYNAMIC) |
a7b2e184 | 2636 | -ftls-model=[global-dynamic|local-dynamic|initial-exec|local-exec] Set the default thread-local storage code generation model. |
058de654 | 2637 | |
e6d4b984 JM |
2638 | Enum |
2639 | Name(tls_model) Type(enum tls_model) UnknownError(unknown TLS model %qs) | |
2640 | ||
2641 | EnumValue | |
2642 | Enum(tls_model) String(global-dynamic) Value(TLS_MODEL_GLOBAL_DYNAMIC) | |
2643 | ||
2644 | EnumValue | |
2645 | Enum(tls_model) String(local-dynamic) Value(TLS_MODEL_LOCAL_DYNAMIC) | |
2646 | ||
2647 | EnumValue | |
2648 | Enum(tls_model) String(initial-exec) Value(TLS_MODEL_INITIAL_EXEC) | |
2649 | ||
2650 | EnumValue | |
2651 | Enum(tls_model) String(local-exec) Value(TLS_MODEL_LOCAL_EXEC) | |
2652 | ||
474eccc6 | 2653 | ftoplevel-reorder |
ad74bc8c | 2654 | Common Report Var(flag_toplevel_reorder) Init(2) Optimization |
a7b2e184 | 2655 | Reorder top level functions, variables, and asms. |
474eccc6 | 2656 | |
de32c0cb | 2657 | ftracer |
b16650ac | 2658 | Common Report Var(flag_tracer) Optimization |
a7b2e184 | 2659 | Perform superblock formation via tail duplication. |
de32c0cb | 2660 | |
4c640e26 EB |
2661 | ftrampolines |
2662 | Common Report Var(flag_trampolines) Init(0) | |
2663 | For targets that normally need trampolines for nested functions, always | |
2664 | generate them instead of using descriptors. | |
2665 | ||
31b66477 KC |
2666 | ; Zero means that floating-point math operations cannot generate a |
2667 | ; (user-visible) trap. This is the case, for example, in nonstop | |
2668 | ; IEEE 754 arithmetic. | |
6ff3a151 | 2669 | ftrapping-math |
5e46b0c6 | 2670 | Common Report Var(flag_trapping_math) Init(1) Optimization SetByCombined |
a7b2e184 | 2671 | Assume floating-point operations can trap. |
6ff3a151 NB |
2672 | |
2673 | ftrapv | |
c662432e | 2674 | Common Report Var(flag_trapv) Optimization |
a7b2e184 | 2675 | Trap for signed overflow in addition, subtraction and multiplication. |
6ff3a151 | 2676 | |
6de9cd9a | 2677 | ftree-ccp |
c662432e | 2678 | Common Report Var(flag_tree_ccp) Optimization |
a7b2e184 | 2679 | Enable SSA-CCP optimization on trees. |
6de9cd9a | 2680 | |
0b4b14ac RG |
2681 | ftree-bit-ccp |
2682 | Common Report Var(flag_tree_bit_ccp) Optimization | |
a7b2e184 | 2683 | Enable SSA-BIT-CCP optimization on trees. |
0b4b14ac | 2684 | |
0bca51f0 | 2685 | ftree-store-ccp |
2d2bd949 | 2686 | Common Ignore |
dce2b2f6 | 2687 | Does nothing. Preserved for backward compatibility. |
0bca51f0 | 2688 | |
6de9cd9a | 2689 | ftree-ch |
c662432e | 2690 | Common Report Var(flag_tree_ch) Optimization |
a7b2e184 | 2691 | Enable loop header copying on trees. |
6de9cd9a | 2692 | |
21d01365 | 2693 | ftree-coalesce-inlined-vars |
1f9ceff1 AO |
2694 | Common Ignore RejectNegative |
2695 | Does nothing. Preserved for backward compatibility. | |
21d01365 AO |
2696 | |
2697 | ftree-coalesce-vars | |
1f9ceff1 | 2698 | Common Report Var(flag_tree_coalesce_vars) Optimization |
a7b2e184 | 2699 | Enable SSA coalescing of user variables. |
21d01365 | 2700 | |
6de9cd9a | 2701 | ftree-copyrename |
1f9ceff1 AO |
2702 | Common Ignore |
2703 | Does nothing. Preserved for backward compatibility. | |
6de9cd9a | 2704 | |
0bca51f0 | 2705 | ftree-copy-prop |
c662432e | 2706 | Common Report Var(flag_tree_copy_prop) Optimization |
a7b2e184 | 2707 | Enable copy propagation on trees. |
0bca51f0 DN |
2708 | |
2709 | ftree-store-copy-prop | |
2d2bd949 | 2710 | Common Ignore |
e9033855 | 2711 | Does nothing. Preserved for backward compatibility. |
0bca51f0 | 2712 | |
a5828d1e MM |
2713 | ftree-cselim |
2714 | Common Report Var(flag_tree_cselim) Init(2) Optimization | |
a7b2e184 | 2715 | Transform condition stores into unconditional ones. |
a5828d1e | 2716 | |
b6e99746 MJ |
2717 | ftree-switch-conversion |
2718 | Common Report Var(flag_tree_switch_conversion) Optimization | |
2719 | Perform conversions of switch initializations. | |
2720 | ||
6de9cd9a | 2721 | ftree-dce |
c662432e | 2722 | Common Report Var(flag_tree_dce) Optimization |
a7b2e184 | 2723 | Enable SSA dead code elimination optimization on trees. |
6de9cd9a DN |
2724 | |
2725 | ftree-dominator-opts | |
c662432e | 2726 | Common Report Var(flag_tree_dom) Optimization |
a7b2e184 | 2727 | Enable dominator optimizations. |
6de9cd9a | 2728 | |
c9e93168 TV |
2729 | ftree-tail-merge |
2730 | Common Report Var(flag_tree_tail_merge) Optimization | |
a7b2e184 | 2731 | Enable tail merging on trees. |
c9e93168 | 2732 | |
6de9cd9a | 2733 | ftree-dse |
c662432e | 2734 | Common Report Var(flag_tree_dse) Optimization |
a7b2e184 | 2735 | Enable dead store elimination. |
6de9cd9a | 2736 | |
248fc9f3 RG |
2737 | ftree-forwprop |
2738 | Common Report Var(flag_tree_forwprop) Init(1) Optimization | |
a7b2e184 | 2739 | Enable forward propagation on trees. |
248fc9f3 | 2740 | |
ff2ad0f7 | 2741 | ftree-fre |
c662432e | 2742 | Common Report Var(flag_tree_fre) Optimization |
a7b2e184 | 2743 | Enable Full Redundancy Elimination (FRE) on trees. |
ff2ad0f7 | 2744 | |
8b57bfeb JJ |
2745 | foptimize-strlen |
2746 | Common Report Var(flag_optimize_strlen) Optimization | |
a7b2e184 | 2747 | Enable string length optimizations on trees. |
8b57bfeb | 2748 | |
ae93744d JL |
2749 | fisolate-erroneous-paths-dereference |
2750 | Common Report Var(flag_isolate_erroneous_paths_dereference) Optimization | |
408e8aa4 SL |
2751 | Detect paths that trigger erroneous or undefined behavior due to |
2752 | dereferencing a null pointer. Isolate those paths from the main control | |
2753 | flow and turn the statement with erroneous or undefined behavior into a trap. | |
ae93744d JL |
2754 | |
2755 | fisolate-erroneous-paths-attribute | |
2756 | Common Report Var(flag_isolate_erroneous_paths_attribute) Optimization | |
51956afe | 2757 | Detect paths that trigger erroneous or undefined behavior due to a null value |
408e8aa4 | 2758 | being used in a way forbidden by a returns_nonnull or nonnull |
ae93744d | 2759 | attribute. Isolate those paths from the main control flow and turn the |
a7b2e184 | 2760 | statement with erroneous or undefined behavior into a trap. |
8fdc414d | 2761 | |
dea61d92 | 2762 | ftree-loop-distribution |
53ed2f0e | 2763 | Common Report Var(flag_tree_loop_distribution) Optimization |
a7b2e184 | 2764 | Enable loop distribution on trees. |
dea61d92 | 2765 | |
20769d5e SP |
2766 | ftree-loop-distribute-patterns |
2767 | Common Report Var(flag_tree_loop_distribute_patterns) Optimization | |
a7b2e184 | 2768 | Enable loop distribution for patterns transformed into a library call. |
20769d5e | 2769 | |
1b08d87d | 2770 | ftree-loop-im |
c662432e | 2771 | Common Report Var(flag_tree_loop_im) Init(1) Optimization |
a7b2e184 | 2772 | Enable loop invariant motion on trees. |
a7e5372d | 2773 | |
599eabdb | 2774 | ftree-loop-linear |
d6bb5ccf | 2775 | Common Alias(floop-nest-optimize) |
a7b2e184 | 2776 | Enable loop nest transforms. Same as -floop-nest-optimize. |
599eabdb | 2777 | |
1b08d87d | 2778 | ftree-loop-ivcanon |
c662432e | 2779 | Common Report Var(flag_tree_loop_ivcanon) Init(1) Optimization |
a7b2e184 | 2780 | Create canonical induction variables in loops. |
1b08d87d | 2781 | |
c66b6c66 | 2782 | ftree-loop-optimize |
c662432e | 2783 | Common Report Var(flag_tree_loop_optimize) Init(1) Optimization |
a7b2e184 | 2784 | Enable loop optimizations on tree level. |
c66b6c66 | 2785 | |
5f40b3cb | 2786 | ftree-parallelize-loops= |
b16650ac | 2787 | Common Report Joined RejectNegative UInteger Var(flag_tree_parallelize_loops) Init(1) Optimization |
9453ba0a | 2788 | -ftree-parallelize-loops=<number> Enable automatic parallelization of loops. |
5f40b3cb | 2789 | |
248fc9f3 RG |
2790 | ftree-phiprop |
2791 | Common Report Var(flag_tree_phiprop) Init(1) Optimization | |
2792 | Enable hoisting loads from conditional pointers. | |
2793 | ||
6de9cd9a | 2794 | ftree-pre |
c662432e | 2795 | Common Report Var(flag_tree_pre) Optimization |
a7b2e184 | 2796 | Enable SSA-PRE optimization on trees. |
6de9cd9a | 2797 | |
fa06ad0d JR |
2798 | ftree-partial-pre |
2799 | Common Report Var(flag_tree_partial_pre) Optimization | |
a7b2e184 | 2800 | In SSA-PRE optimization on trees, enable partial-partial redundancy elimination. |
fa06ad0d | 2801 | |
248fc9f3 | 2802 | ftree-pta |
14379e66 | 2803 | Common Report Var(flag_tree_pta) Optimization |
248fc9f3 RG |
2804 | Perform function-local points-to analysis on trees. |
2805 | ||
13c59415 UB |
2806 | ftree-reassoc |
2807 | Common Report Var(flag_tree_reassoc) Init(1) Optimization | |
a7b2e184 | 2808 | Enable reassociation on tree level. |
13c59415 | 2809 | |
c75ab022 | 2810 | ftree-salias |
2d2bd949 | 2811 | Common Ignore |
1353232d | 2812 | Does nothing. Preserved for backward compatibility. |
c75ab022 | 2813 | |
fa555252 | 2814 | ftree-sink |
c662432e | 2815 | Common Report Var(flag_tree_sink) Optimization |
a7b2e184 | 2816 | Enable SSA code sinking on trees. |
fa555252 | 2817 | |
75cfe445 BS |
2818 | ftree-slsr |
2819 | Common Report Var(flag_tree_slsr) Optimization | |
a7b2e184 | 2820 | Perform straight-line strength reduction. |
75cfe445 | 2821 | |
6de9cd9a | 2822 | ftree-sra |
c662432e | 2823 | Common Report Var(flag_tree_sra) Optimization |
a7b2e184 | 2824 | Perform scalar replacement of aggregates. |
6de9cd9a DN |
2825 | |
2826 | ftree-ter | |
3020190e | 2827 | Common Report Var(flag_tree_ter) Optimization |
a7b2e184 | 2828 | Replace temporary expressions in the SSA->normal pass. |
6de9cd9a | 2829 | |
c662432e NC |
2830 | ftree-lrs |
2831 | Common Report Var(flag_tree_live_range_split) Optimization | |
a7b2e184 | 2832 | Perform live range splitting during the SSA->normal pass. |
c662432e | 2833 | |
0bca51f0 | 2834 | ftree-vrp |
c662432e | 2835 | Common Report Var(flag_tree_vrp) Init(0) Optimization |
a7b2e184 | 2836 | Perform Value Range Propagation on trees. |
0bca51f0 | 2837 | |
8fe17e23 AA |
2838 | fsplit-paths |
2839 | Common Report Var(flag_split_paths) Init(0) Optimization | |
2840 | Split paths leading to loop backedges. | |
2841 | ||
71017a7b AL |
2842 | funconstrained-commons |
2843 | Common Var(flag_unconstrained_commons) Optimization | |
2844 | Assume common declarations may be overridden with ones with a larger | |
2845 | trailing array. | |
2846 | ||
de32c0cb | 2847 | funit-at-a-time |
b16650ac | 2848 | Common Report Var(flag_unit_at_a_time) Init(1) |
a7b2e184 | 2849 | Compile whole compilation unit at a time. |
de32c0cb NB |
2850 | |
2851 | funroll-loops | |
c662432e | 2852 | Common Report Var(flag_unroll_loops) Optimization |
a7b2e184 | 2853 | Perform loop unrolling when iteration count is known. |
de32c0cb NB |
2854 | |
2855 | funroll-all-loops | |
c662432e | 2856 | Common Report Var(flag_unroll_all_loops) Optimization |
a7b2e184 | 2857 | Perform loop unrolling for all loops. |
de32c0cb | 2858 | |
f9cc1a70 PB |
2859 | ; Nonzero means that loop optimizer may assume that the induction variables |
2860 | ; that control loops do not overflow and that the loops with nontrivial | |
2861 | ; exit condition are not infinite | |
2862 | funsafe-loop-optimizations | |
78f63b79 BC |
2863 | Common Ignore |
2864 | Does nothing. Preserved for backward compatibility. | |
f9cc1a70 | 2865 | |
a1a82611 | 2866 | fassociative-math |
b16650ac | 2867 | Common Report Var(flag_associative_math) SetByCombined Optimization |
a1a82611 RE |
2868 | Allow optimization for floating-point arithmetic which may change the |
2869 | result of the operation due to rounding. | |
2870 | ||
2871 | freciprocal-math | |
b16650ac | 2872 | Common Report Var(flag_reciprocal_math) SetByCombined Optimization |
a1a82611 RE |
2873 | Same as -fassociative-math for expressions which include division. |
2874 | ||
31b66477 KC |
2875 | ; Nonzero means that unsafe floating-point math optimizations are allowed |
2876 | ; for the sake of speed. IEEE compliance is not guaranteed, and operations | |
2877 | ; are allowed to assume that their arguments and results are "normal" | |
2878 | ; (e.g., nonnegative for SQRT). | |
6ff3a151 | 2879 | funsafe-math-optimizations |
5e46b0c6 | 2880 | Common Report Var(flag_unsafe_math_optimizations) Optimization SetByCombined |
a7b2e184 | 2881 | Allow math optimizations that may violate IEEE or ISO standards. |
6ff3a151 | 2882 | |
de32c0cb | 2883 | funswitch-loops |
c662432e | 2884 | Common Report Var(flag_unswitch_loops) Optimization |
a7b2e184 | 2885 | Perform loop unswitching. |
de32c0cb | 2886 | |
28df8730 MM |
2887 | fsplit-loops |
2888 | Common Report Var(flag_split_loops) Optimization | |
2889 | Perform loop splitting. | |
2890 | ||
13e08dc9 RS |
2891 | fversion-loops-for-strides |
2892 | Common Report Var(flag_version_loops_for_strides) Optimization | |
2893 | Version loops based on whether indices have a stride of one. | |
2894 | ||
6ff3a151 | 2895 | funwind-tables |
c662432e | 2896 | Common Report Var(flag_unwind_tables) Optimization |
a7b2e184 | 2897 | Just generate unwind tables for exception handling. |
6ff3a151 | 2898 | |
b352afba | 2899 | fuse-ld=bfd |
b78e932d | 2900 | Common Driver Negative(fuse-ld=gold) |
a7b2e184 | 2901 | Use the bfd linker instead of the default linker. |
b352afba NC |
2902 | |
2903 | fuse-ld=gold | |
b78e932d | 2904 | Common Driver Negative(fuse-ld=bfd) |
a7b2e184 | 2905 | Use the gold linker instead of the default linker. |
b352afba | 2906 | |
d69ac8b7 RG |
2907 | fuse-ld=lld |
2908 | Common Driver Negative(fuse-ld=lld) | |
2909 | Use the lld LLVM linker instead of the default linker. | |
2910 | ||
da18ea94 | 2911 | fuse-linker-plugin |
063d671d | 2912 | Common Undocumented Var(flag_use_linker_plugin) |
da18ea94 | 2913 | |
e90afde6 JM |
2914 | ; Positive if we should track variables, negative if we should run |
2915 | ; the var-tracking pass only to discard debug annotations, zero if | |
2916 | ; we're not to run it. When flag_var_tracking == 2 (AUTODETECT_VALUE) it | |
2917 | ; will be set according to optimize, debug_info_level and debug_hooks | |
2918 | ; in process_options (). | |
014a1138 | 2919 | fvar-tracking |
ff98fa95 | 2920 | Common Report Var(flag_var_tracking) Init(2) PerFunction |
a7b2e184 | 2921 | Perform variable tracking. |
014a1138 | 2922 | |
e90afde6 JM |
2923 | ; Positive if we should track variables at assignments, negative if |
2924 | ; we should run the var-tracking pass only to discard debug | |
2925 | ; annotations. When flag_var_tracking_assignments == | |
2926 | ; AUTODETECT_VALUE it will be set according to flag_var_tracking. | |
b5b8b0ac | 2927 | fvar-tracking-assignments |
ff98fa95 | 2928 | Common Report Var(flag_var_tracking_assignments) Init(2) PerFunction |
a7b2e184 | 2929 | Perform variable tracking by annotating assignments. |
b5b8b0ac | 2930 | |
e90afde6 JM |
2931 | ; Nonzero if we should toggle flag_var_tracking_assignments after |
2932 | ; processing options and computing its default. */ | |
b5b8b0ac | 2933 | fvar-tracking-assignments-toggle |
ff98fa95 | 2934 | Common Report Var(flag_var_tracking_assignments_toggle) PerFunction |
a7b2e184 | 2935 | Toggle -fvar-tracking-assignments. |
b5b8b0ac | 2936 | |
1267ca30 EB |
2937 | ; Positive if we should track uninitialized variables, negative if |
2938 | ; we should run the var-tracking pass only to discard debug | |
2939 | ; annotations. When flag_var_tracking_uninit == AUTODETECT_VALUE it | |
2940 | ; will be set according to flag_var_tracking. | |
62760ffd | 2941 | fvar-tracking-uninit |
ff98fa95 | 2942 | Common Report Var(flag_var_tracking_uninit) PerFunction |
a7b2e184 | 2943 | Perform variable tracking and also tag variables that are uninitialized. |
62760ffd | 2944 | |
26d476cd | 2945 | ; Alias to enable both -ftree-loop-vectorize and -ftree-slp-vectorize. |
79fe1b3b | 2946 | ftree-vectorize |
26d476cd | 2947 | Common Report Optimization |
a7b2e184 | 2948 | Enable vectorization on trees. |
79fe1b3b | 2949 | |
78c60e3d | 2950 | ftree-vectorizer-verbose= |
477e804b SS |
2951 | Common Joined RejectNegative Ignore |
2952 | Does nothing. Preserved for backward compatibility. | |
78c60e3d | 2953 | |
ea0f3e87 | 2954 | ftree-loop-vectorize |
26d476cd | 2955 | Common Report Var(flag_tree_loop_vectorize) Optimization EnabledBy(ftree-vectorize) |
a7b2e184 | 2956 | Enable loop vectorization on trees. |
ea0f3e87 | 2957 | |
a70d6342 | 2958 | ftree-slp-vectorize |
26d476cd | 2959 | Common Report Var(flag_tree_slp_vectorize) Optimization EnabledBy(ftree-vectorize) |
a7b2e184 | 2960 | Enable basic block vectorization (SLP) on trees. |
a70d6342 | 2961 | |
d6d11272 | 2962 | fvect-cost-model= |
b16650ac | 2963 | Common Joined RejectNegative Enum(vect_cost_model) Var(flag_vect_cost_model) Init(VECT_COST_MODEL_DEFAULT) Optimization |
6a825afe | 2964 | -fvect-cost-model=[unlimited|dynamic|cheap] Specifies the cost model for vectorization. |
a7b2e184 | 2965 | |
8b5e1202 | 2966 | fsimd-cost-model= |
b16650ac | 2967 | Common Joined RejectNegative Enum(vect_cost_model) Var(flag_simd_cost_model) Init(VECT_COST_MODEL_UNLIMITED) Optimization |
6a825afe | 2968 | -fsimd-cost-model=[unlimited|dynamic|cheap] Specifies the vectorization cost model for code marked with a simd directive. |
8b5e1202 | 2969 | |
d6d11272 XDL |
2970 | Enum |
2971 | Name(vect_cost_model) Type(enum vect_cost_model) UnknownError(unknown vectorizer cost model %qs) | |
2972 | ||
2973 | EnumValue | |
2974 | Enum(vect_cost_model) String(unlimited) Value(VECT_COST_MODEL_UNLIMITED) | |
2975 | ||
2976 | EnumValue | |
2977 | Enum(vect_cost_model) String(dynamic) Value(VECT_COST_MODEL_DYNAMIC) | |
2978 | ||
2979 | EnumValue | |
2980 | Enum(vect_cost_model) String(cheap) Value(VECT_COST_MODEL_CHEAP) | |
2981 | ||
792ed98b | 2982 | fvect-cost-model |
205d7111 | 2983 | Common Alias(fvect-cost-model=,dynamic,unlimited) |
d6d11272 XDL |
2984 | Enables the dynamic vectorizer cost model. Preserved for backward compatibility. |
2985 | ||
c12cc930 | 2986 | ftree-vect-loop-version |
d6d11272 XDL |
2987 | Common Ignore |
2988 | Does nothing. Preserved for backward compatibility. | |
c12cc930 | 2989 | |
fbf798fc | 2990 | ftree-scev-cprop |
21af5cdf | 2991 | Common Report Var(flag_tree_scev_cprop) Init(1) Optimization |
fbf798fc DN |
2992 | Enable copy propagation of scalar-evolution information. |
2993 | ||
31b66477 KC |
2994 | ; -fverbose-asm causes extra commentary information to be produced in |
2995 | ; the generated assembly code (to make it more readable). This option | |
2996 | ; is generally only of use to those who actually need to read the | |
2997 | ; generated assembly code (perhaps while debugging the compiler itself). | |
2998 | ; -fno-verbose-asm, the default, causes the extra information | |
2999 | ; to not be added and is useful when comparing two assembler files. | |
6ff3a151 | 3000 | fverbose-asm |
50431bc4 | 3001 | Common Report Var(flag_verbose_asm) |
a7b2e184 | 3002 | Add extra commentary to assembler output. |
6ff3a151 | 3003 | |
d7afec4b | 3004 | fvisibility= |
e6d4b984 | 3005 | Common Joined RejectNegative Enum(symbol_visibility) Var(default_visibility) Init(VISIBILITY_DEFAULT) |
a7b2e184 | 3006 | -fvisibility=[default|internal|hidden|protected] Set the default symbol visibility. |
d7afec4b | 3007 | |
e6d4b984 JM |
3008 | Enum |
3009 | Name(symbol_visibility) Type(enum symbol_visibility) UnknownError(unrecognized visibility value %qs) | |
3010 | ||
3011 | EnumValue | |
3012 | Enum(symbol_visibility) String(default) Value(VISIBILITY_DEFAULT) | |
3013 | ||
3014 | EnumValue | |
3015 | Enum(symbol_visibility) String(internal) Value(VISIBILITY_INTERNAL) | |
3016 | ||
3017 | EnumValue | |
3018 | Enum(symbol_visibility) String(hidden) Value(VISIBILITY_HIDDEN) | |
3019 | ||
3020 | EnumValue | |
3021 | Enum(symbol_visibility) String(protected) Value(VISIBILITY_PROTECTED) | |
d7afec4b | 3022 | |
2077db1b CT |
3023 | fvtable-verify= |
3024 | Common Joined RejectNegative Enum(vtv_priority) Var(flag_vtable_verify) Init(VTV_NO_PRIORITY) | |
3025 | Validate vtable pointers before using them. | |
3026 | ||
3027 | Enum | |
3028 | Name(vtv_priority) Type(enum vtv_priority) UnknownError(unknown vtable verify initialization priority %qs) | |
3029 | ||
3030 | EnumValue | |
3031 | Enum(vtv_priority) String(none) Value(VTV_NO_PRIORITY) | |
3032 | ||
3033 | EnumValue | |
3034 | Enum(vtv_priority) String(std) Value(VTV_STANDARD_PRIORITY) | |
3035 | ||
3036 | EnumValue | |
3037 | Enum(vtv_priority) String(preinit) Value(VTV_PREINIT_PRIORITY) | |
3038 | ||
3039 | fvtv-counts | |
3040 | Common Var(flag_vtv_counts) | |
3041 | Output vtable verification counters. | |
3042 | ||
3043 | fvtv-debug | |
3044 | Common Var(flag_vtv_debug) | |
3045 | Output vtable verification pointer sets information. | |
3046 | ||
fca9dc00 | 3047 | fvpt |
c662432e | 3048 | Common Report Var(flag_value_profile_transformations) Optimization |
a7b2e184 | 3049 | Use expression value profiles in optimizations. |
fca9dc00 | 3050 | |
62551c66 | 3051 | fweb |
c662432e | 3052 | Common Report Var(flag_web) Init(2) Optimization |
a7b2e184 | 3053 | Construct webs and split unrelated uses of single variable. |
62551c66 | 3054 | |
c2699190 XDL |
3055 | ftree-builtin-call-dce |
3056 | Common Report Var(flag_tree_builtin_call_dce) Init(0) Optimization | |
a7b2e184 | 3057 | Enable conditional dead code elimination for builtin calls. |
c2699190 | 3058 | |
ce91e74c | 3059 | fwhole-program |
b16650ac | 3060 | Common Report Var(flag_whole_program) Init(0) |
a7b2e184 | 3061 | Perform whole program optimizations. |
ce91e74c | 3062 | |
3fccbb9e JJ |
3063 | fwrapv-pointer |
3064 | Common Report Var(flag_wrapv_pointer) Optimization | |
3065 | Assume pointer overflow wraps around. | |
3066 | ||
6ff3a151 | 3067 | fwrapv |
c662432e | 3068 | Common Report Var(flag_wrapv) Optimization |
a7b2e184 | 3069 | Assume signed arithmetic overflow wraps around. |
6ff3a151 | 3070 | |
6ff3a151 | 3071 | fzero-initialized-in-bss |
50431bc4 | 3072 | Common Report Var(flag_zero_initialized_in_bss) Init(1) |
a7b2e184 | 3073 | Put zero initialized data in the bss section. |
6ff3a151 | 3074 | |
e01cc6dc | 3075 | g |
9ed32e27 | 3076 | Common Driver RejectNegative JoinedOrMissing |
a7b2e184 | 3077 | Generate debug information in default format. |
df38ffef | 3078 | |
924c9e3e AO |
3079 | gas-loc-support |
3080 | Common Driver Var(dwarf2out_as_loc_support) Init(2) | |
04e5c73d | 3081 | Assume assembler support for (DWARF2+) .loc directives. |
924c9e3e AO |
3082 | |
3083 | gas-locview-support | |
3084 | Common Driver Var(dwarf2out_as_locview_support) Init(2) | |
04e5c73d | 3085 | Assume assembler support for view in (DWARF2+) .loc directives. |
924c9e3e | 3086 | |
e7e95821 | 3087 | gcoff |
68a57628 | 3088 | Common Driver WarnRemoved |
e7e95821 JW |
3089 | Does nothing. Preserved for backward compatibility. |
3090 | ||
3091 | gcoff1 | |
68a57628 | 3092 | Common Driver WarnRemoved |
e7e95821 JW |
3093 | Does nothing. Preserved for backward compatibility. |
3094 | ||
3095 | gcoff2 | |
68a57628 | 3096 | Common Driver WarnRemoved |
e7e95821 JW |
3097 | Does nothing. Preserved for backward compatibility. |
3098 | ||
3099 | gcoff3 | |
68a57628 | 3100 | Common Driver WarnRemoved |
e7e95821 JW |
3101 | Does nothing. Preserved for backward compatibility. |
3102 | ||
0029b929 | 3103 | gcolumn-info |
8008dd1c | 3104 | Common Driver Var(debug_column_info,1) Init(1) |
0029b929 JJ |
3105 | Record DW_AT_decl_column and DW_AT_call_column in DWARF. |
3106 | ||
6782438d | 3107 | gdwarf |
1c70261c | 3108 | Common Driver JoinedOrMissing Negative(gdwarf-) |
a7b2e184 | 3109 | Generate debug information in default version of DWARF format. |
6782438d | 3110 | |
53b2323e | 3111 | gdwarf- |
1c70261c | 3112 | Common Driver Joined UInteger Var(dwarf_version) Init(4) Negative(gstabs) |
a7b2e184 | 3113 | Generate debug information in DWARF v2 (or later) format. |
df38ffef NB |
3114 | |
3115 | ggdb | |
1c70261c | 3116 | Common Driver JoinedOrMissing |
a7b2e184 | 3117 | Generate debug information in default extended format. |
df38ffef | 3118 | |
924c9e3e AO |
3119 | ginline-points |
3120 | Common Driver Var(debug_inline_points) Init(2) | |
04e5c73d | 3121 | Generate extended entry point information for inlined functions. |
924c9e3e AO |
3122 | |
3123 | ginternal-reset-location-views | |
3124 | Common Driver Var(debug_internal_reset_location_views) Init(2) | |
04e5c73d | 3125 | Compute locview reset points based on insn length estimates. |
924c9e3e | 3126 | |
9ed32e27 AO |
3127 | gno- |
3128 | RejectNegative Joined Undocumented | |
3129 | ; Catch the gno- prefix, so it doesn't backtrack to g<level>. | |
3130 | ||
5175cbaf | 3131 | gno-pubnames |
1c70261c | 3132 | Common Driver Negative(gpubnames) Var(debug_generate_pub_sections, 0) Init(-1) |
5175cbaf SA |
3133 | Don't generate DWARF pubnames and pubtypes sections. |
3134 | ||
3135 | gpubnames | |
1c70261c | 3136 | Common Driver Negative(ggnu-pubnames) Var(debug_generate_pub_sections, 1) |
5175cbaf SA |
3137 | Generate DWARF pubnames and pubtypes sections. |
3138 | ||
7a1dd0fa | 3139 | ggnu-pubnames |
1c70261c | 3140 | Common Driver Negative(gno-pubnames) Var(debug_generate_pub_sections, 2) |
7a1dd0fa SA |
3141 | Generate DWARF pubnames and pubtypes sections with GNU extensions. |
3142 | ||
e967adf4 | 3143 | grecord-gcc-switches |
9ed32e27 | 3144 | Common Driver Var(dwarf_record_gcc_switches) Init(1) |
e967adf4 JJ |
3145 | Record gcc command line switches in DWARF DW_AT_producer. |
3146 | ||
99ea153e | 3147 | gsplit-dwarf |
9ed32e27 | 3148 | Common Driver Var(dwarf_split_debug_info) Init(0) |
a7b2e184 | 3149 | Generate debug information in separate .dwo files. |
99ea153e | 3150 | |
df38ffef | 3151 | gstabs |
1c70261c | 3152 | Common Driver JoinedOrMissing Negative(gstabs+) |
a7b2e184 | 3153 | Generate debug information in STABS format. |
df38ffef NB |
3154 | |
3155 | gstabs+ | |
1c70261c | 3156 | Common Driver JoinedOrMissing Negative(gvms) |
a7b2e184 | 3157 | Generate debug information in extended STABS format. |
df38ffef | 3158 | |
8697bf9f AO |
3159 | gstatement-frontiers |
3160 | Common Driver Var(debug_nonbind_markers_p) Init(2) | |
3161 | Emit progressive recommended breakpoint locations. | |
3162 | ||
65f753a0 | 3163 | gstrict-dwarf |
9ed32e27 | 3164 | Common Driver Report Var(dwarf_strict) Init(0) |
a7b2e184 | 3165 | Don't emit DWARF additions beyond selected version. |
65f753a0 | 3166 | |
03e992ac TV |
3167 | gdescribe-dies |
3168 | Common Driver Report Var(flag_describe_dies) Init(0) | |
3169 | Add description attributes to some DWARF DIEs that have no name attribute. | |
3170 | ||
2153915d | 3171 | gtoggle |
1c70261c | 3172 | Common Driver Report Var(flag_gtoggle) |
a7b2e184 | 3173 | Toggle debug information generation. |
2153915d | 3174 | |
bd2b9f1e AO |
3175 | gvariable-location-views |
3176 | Common Driver Var(debug_variable_location_views, 1) Init(2) | |
3177 | Augment variable location lists with progressive views. | |
3178 | ||
3179 | gvariable-location-views=incompat5 | |
3180 | Common Driver RejectNegative Var(debug_variable_location_views, -1) Init(2) | |
3181 | ||
df38ffef | 3182 | gvms |
1c70261c | 3183 | Common Driver JoinedOrMissing Negative(gxcoff) |
a7b2e184 | 3184 | Generate debug information in VMS format. |
df38ffef NB |
3185 | |
3186 | gxcoff | |
1c70261c | 3187 | Common Driver JoinedOrMissing Negative(gxcoff+) |
a7b2e184 | 3188 | Generate debug information in XCOFF format. |
df38ffef NB |
3189 | |
3190 | gxcoff+ | |
180295ed | 3191 | Common Driver JoinedOrMissing Negative(gdwarf) |
a7b2e184 | 3192 | Generate debug information in extended XCOFF format. |
e01cc6dc | 3193 | |
29d7cbd1 RO |
3194 | Enum |
3195 | Name(compressed_debug_sections) Type(int) | |
3196 | ||
3197 | ; Since -gz= is completely handled in specs, the values aren't used and we | |
3198 | ; assign arbitrary constants. | |
3199 | EnumValue | |
3200 | Enum(compressed_debug_sections) String(none) Value(0) | |
3201 | ||
3202 | EnumValue | |
3203 | Enum(compressed_debug_sections) String(zlib) Value(1) | |
3204 | ||
3205 | EnumValue | |
3206 | Enum(compressed_debug_sections) String(zlib-gnu) Value(2) | |
3207 | ||
3208 | gz | |
3209 | Common Driver | |
a7b2e184 | 3210 | Generate compressed debug sections. |
29d7cbd1 RO |
3211 | |
3212 | gz= | |
9ed32e27 | 3213 | Common Driver RejectNegative Joined Enum(compressed_debug_sections) |
a7b2e184 | 3214 | -gz=<format> Generate compressed debug sections in format <format>. |
29d7cbd1 | 3215 | |
6d721f67 JM |
3216 | h |
3217 | Driver Joined Separate | |
3218 | ||
4adbd5dd MK |
3219 | iplugindir= |
3220 | Common Joined Var(plugindir_string) Init(0) | |
a7b2e184 | 3221 | -iplugindir=<dir> Set <dir> to be the default plugin directory. |
4adbd5dd | 3222 | |
e0cdc09f MK |
3223 | imultiarch |
3224 | Common Joined Separate RejectDriver Var(imultiarch) Init(0) | |
a7b2e184 | 3225 | -imultiarch <dir> Set <dir> to be the multiarch include subdirectory. |
e0cdc09f | 3226 | |
603349bf JM |
3227 | l |
3228 | Driver Joined Separate | |
3229 | ||
dd9f93dc JM |
3230 | n |
3231 | Driver | |
3232 | ||
603349bf JM |
3233 | no-canonical-prefixes |
3234 | Driver | |
3235 | ||
d9d16a19 JM |
3236 | nodefaultlibs |
3237 | Driver | |
3238 | ||
bab79a40 JM |
3239 | nostartfiles |
3240 | Driver | |
3241 | ||
f37866e8 OH |
3242 | nolibc |
3243 | Driver | |
3244 | ||
d9d16a19 JM |
3245 | nostdlib |
3246 | Driver | |
3247 | ||
d185d268 | 3248 | o |
d5478783 | 3249 | Common Driver Joined Separate Var(asm_file_name) MissingArgError(missing filename after %qs) |
a7b2e184 | 3250 | -o <file> Place output into <file>. |
d185d268 NB |
3251 | |
3252 | p | |
50431bc4 | 3253 | Common Var(profile_flag) |
a7b2e184 | 3254 | Enable function profiling. |
d185d268 | 3255 | |
603349bf JM |
3256 | pass-exit-codes |
3257 | Driver Var(pass_exit_codes) | |
3258 | ||
d185d268 | 3259 | pedantic |
c1771a20 | 3260 | Common Alias(Wpedantic) |
d185d268 NB |
3261 | |
3262 | pedantic-errors | |
d5478783 | 3263 | Common Var(flag_pedantic_errors) |
a7b2e184 | 3264 | Like -pedantic but issue them as errors. |
d185d268 | 3265 | |
d9d16a19 JM |
3266 | pg |
3267 | Driver | |
3268 | ||
603349bf JM |
3269 | pipe |
3270 | Driver Var(use_pipes) | |
3271 | ||
3272 | print-file-name= | |
3273 | Driver JoinedOrMissing Var(print_file_name) | |
3274 | ||
3275 | print-libgcc-file-name | |
3276 | Driver | |
3277 | ||
3278 | print-multi-directory | |
3279 | Driver Var(print_multi_directory) | |
3280 | ||
3281 | print-multi-lib | |
3282 | Driver Var(print_multi_lib) | |
3283 | ||
3284 | print-multi-os-directory | |
3285 | Driver Var(print_multi_os_directory) | |
a7b2e184 | 3286 | |
e0cdc09f MK |
3287 | print-multiarch |
3288 | Driver Var(print_multiarch) | |
603349bf JM |
3289 | |
3290 | print-prog-name= | |
3291 | Driver JoinedOrMissing Var(print_prog_name) | |
3292 | ||
3293 | print-search-dirs | |
3294 | Driver Var(print_search_dirs) | |
3295 | ||
3296 | print-sysroot | |
3297 | Driver Var(print_sysroot) | |
3298 | ||
3299 | print-sysroot-headers-suffix | |
3300 | Driver Var(print_sysroot_headers_suffix) | |
3301 | ||
d7b42618 | 3302 | quiet |
603349bf | 3303 | Common Var(quiet_flag) RejectDriver |
a7b2e184 | 3304 | Do not display functions compiled or elapsed time. |
d7b42618 | 3305 | |
dd9f93dc JM |
3306 | r |
3307 | Driver | |
3308 | ||
3309 | s | |
3310 | Driver | |
3311 | ||
603349bf JM |
3312 | save-temps |
3313 | Driver | |
3314 | ||
3315 | save-temps= | |
3316 | Driver Joined | |
3317 | ||
dd9f93dc JM |
3318 | t |
3319 | Driver | |
3320 | ||
603349bf JM |
3321 | time |
3322 | Driver Var(report_times) | |
3323 | ||
3324 | time= | |
3325 | Driver JoinedOrMissing | |
3326 | ||
e200444e JM |
3327 | u |
3328 | Driver Joined Separate | |
3329 | ||
5642f5d5 JM |
3330 | undef |
3331 | Driver | |
3332 | ; C option, but driver must not handle as "-u ndef". | |
3333 | ||
603349bf | 3334 | v |
d5478783 | 3335 | Common Driver Var(verbose_flag) |
a7b2e184 | 3336 | Enable verbose output. |
603349bf | 3337 | |
d185d268 | 3338 | version |
603349bf | 3339 | Common Var(version_flag) RejectDriver |
a7b2e184 | 3340 | Display the compiler's version. |
d185d268 NB |
3341 | |
3342 | w | |
50431bc4 | 3343 | Common Var(inhibit_warnings) |
a7b2e184 | 3344 | Suppress warnings. |
d185d268 | 3345 | |
603349bf JM |
3346 | wrapper |
3347 | Driver Separate Var(wrapper_string) | |
3348 | ||
3349 | x | |
3350 | Driver Joined Separate | |
3351 | ||
528dc603 | 3352 | shared |
b4fed890 | 3353 | Driver RejectNegative Negative(static-pie) |
a7b2e184 | 3354 | Create a shared library. |
528dc603 | 3355 | |
603349bf JM |
3356 | shared-libgcc |
3357 | Driver | |
3358 | ||
3359 | specs | |
5de8299c | 3360 | Driver Separate Alias(specs=) |
603349bf JM |
3361 | |
3362 | specs= | |
3363 | Driver Joined | |
3364 | ||
d9d16a19 JM |
3365 | static |
3366 | Driver | |
3367 | ||
603349bf JM |
3368 | static-libgcc |
3369 | Driver | |
3370 | ||
3371 | static-libgfortran | |
3372 | Driver | |
3373 | ; Documented for Fortran, but always accepted by driver. | |
3374 | ||
3375 | static-libstdc++ | |
3376 | Driver | |
3377 | ||
7a938933 ILT |
3378 | static-libgo |
3379 | Driver | |
3380 | ; Documented for Go, but always accepted by driver. | |
3381 | ||
7e8d1b2d L |
3382 | static-libasan |
3383 | Driver | |
3384 | ||
32b4b7f5 DV |
3385 | static-libtsan |
3386 | Driver | |
3387 | ||
9065ada9 JJ |
3388 | static-liblsan |
3389 | Driver | |
3390 | ||
de5a5fa1 MP |
3391 | static-libubsan |
3392 | Driver | |
3393 | ||
e200444e JM |
3394 | symbolic |
3395 | Driver | |
3396 | ||
428b3812 | 3397 | no-pie |
5460e1fc | 3398 | Driver RejectNegative Negative(shared) |
b4fed890 | 3399 | Don't create a dynamically linked position independent executable. |
428b3812 L |
3400 | |
3401 | pie | |
3402 | Driver RejectNegative Negative(no-pie) | |
b4fed890 L |
3403 | Create a dynamically linked position independent executable. |
3404 | ||
3405 | static-pie | |
3406 | Driver RejectNegative Negative(pie) | |
3407 | Create a static position independent executable. | |
528dc603 | 3408 | |
6d721f67 JM |
3409 | z |
3410 | Driver Joined Separate | |
3411 | ||
1e288103 TV |
3412 | fipa-ra |
3413 | Common Report Var(flag_ipa_ra) Optimization | |
a7b2e184 | 3414 | Use caller save register across calls if possible. |
d996e61a | 3415 | |
d7b42618 | 3416 | ; This comment is to ensure we retain the blank line above. |