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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 | |
23a5b65a | 3 | ; Copyright (C) 2003-2014 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 | ||
a75bfaa6 JM |
49 | ; 0 means straightforward implementation of complex divide acceptable. |
50 | ; 1 means wide ranges of inputs must work for complex divide. | |
51 | ; 2 means C99-like requirements for complex multiply and divide. | |
52 | Variable | |
53 | int flag_complex_method = 1 | |
54 | ||
55 | ; Nonzero if subexpressions must be evaluated from left-to-right. | |
56 | Variable | |
57 | int flag_evaluation_order = 0 | |
58 | ||
a75bfaa6 JM |
59 | ; Language specific warning pass for unused results. |
60 | Variable | |
61 | bool flag_warn_unused_result = false | |
62 | ||
48476d13 JM |
63 | Variable |
64 | int *param_values | |
65 | ||
d5478783 JM |
66 | ; Nonzero if we should write GIMPLE bytecode for link-time optimization. |
67 | Variable | |
68 | int flag_generate_lto | |
69 | ||
70 | ; True to warn about any objects definitions whose size is larger | |
71 | ; than N bytes. Also want about function definitions whose returned | |
72 | ; values are larger than N bytes, where N is 'larger_than_size'. | |
73 | Variable | |
74 | bool warn_larger_than | |
75 | ||
76 | Variable | |
77 | HOST_WIDE_INT larger_than_size | |
78 | ||
79 | ; True to warn about any function whose frame size is larger | |
80 | ; than N bytes. | |
81 | Variable | |
82 | bool warn_frame_larger_than | |
83 | ||
84 | Variable | |
85 | HOST_WIDE_INT frame_larger_than_size | |
86 | ||
87 | ; Nonzero means we should be saving declaration info into a .X file. | |
88 | Variable | |
89 | int flag_gen_aux_info = 0 | |
90 | ||
91 | ; Nonzero if we are compiling code for a shared library, zero for | |
92 | ; executable. | |
93 | Variable | |
94 | int flag_shlib | |
95 | ||
6a1f6c9c JM |
96 | ; These two are really VEC(char_p,heap) *. |
97 | ||
98 | Variable | |
99 | void *flag_instrument_functions_exclude_functions | |
100 | ||
101 | Variable | |
102 | void *flag_instrument_functions_exclude_files | |
103 | ||
69ccdddb JM |
104 | ; Generic structs (e.g. templates not explicitly specialized) |
105 | ; may not have a compilation unit associated with them, and so | |
106 | ; may need to be treated differently from ordinary structs. | |
107 | ; | |
108 | ; Structs only handled by reference (indirectly), will also usually | |
109 | ; not need as much debugging information. | |
110 | ||
111 | Variable | |
112 | enum debug_struct_file debug_struct_ordinary[DINFO_USAGE_NUM_ENUMS] = { DINFO_STRUCT_FILE_ANY, DINFO_STRUCT_FILE_ANY, DINFO_STRUCT_FILE_ANY } | |
113 | ||
114 | Variable | |
115 | enum debug_struct_file debug_struct_generic[DINFO_USAGE_NUM_ENUMS] = { DINFO_STRUCT_FILE_ANY, DINFO_STRUCT_FILE_ANY, DINFO_STRUCT_FILE_ANY } | |
116 | ||
0576d21f JM |
117 | ; True if we should exit after parsing options. |
118 | Variable | |
119 | bool exit_after_options | |
120 | ||
121 | ; Type(s) of debugging information we are producing (if any). See | |
122 | ; flag-types.h for the definitions of the different possible types of | |
123 | ; debugging information. | |
124 | Variable | |
125 | enum debug_info_type write_symbols = NO_DEBUG | |
126 | ||
127 | ; Level of debugging information we are producing. See flag-types.h | |
128 | ; for the definitions of the different possible levels. | |
129 | Variable | |
130 | enum debug_info_levels debug_info_level = DINFO_LEVEL_NONE | |
131 | ||
132 | ; Nonzero means use GNU-only extensions in the generated symbolic | |
133 | ; debugging information. Currently, this only has an effect when | |
134 | ; write_symbols is set to DBX_DEBUG, XCOFF_DEBUG, or DWARF_DEBUG. | |
135 | Variable | |
136 | bool use_gnu_debug_info_extensions | |
137 | ||
299404a1 JM |
138 | ; Original value of maximum field alignment in bytes, specified via |
139 | ; -fpack-struct=<value>. | |
140 | Variable | |
141 | unsigned int initial_max_fld_align = TARGET_DEFAULT_PACK_STRUCT | |
142 | ||
5e471ea6 JM |
143 | ; Type of stack check. |
144 | Variable | |
145 | enum stack_check_type flag_stack_check = NO_STACK_CHECK | |
146 | ||
a11e0df4 EB |
147 | ; True if stack usage information needs to be computed. |
148 | Variable | |
149 | bool flag_stack_usage_info = false | |
150 | ||
299404a1 JM |
151 | ; -dA causes debug commentary information to be produced in |
152 | ; the generated assembly code (to make it more readable). This option | |
153 | ; is generally only of use to those who actually need to read the | |
154 | ; generated assembly code (perhaps while debugging the compiler itself). | |
155 | ; Currently, this switch is only used by dwarf2out.c; however, it is intended | |
156 | ; to be a catchall for printing debug information in the assembler file. | |
157 | Variable | |
158 | int flag_debug_asm | |
159 | ||
160 | ; -dP causes the rtl to be emitted as a comment in assembly. | |
161 | Variable | |
162 | int flag_dump_rtl_in_asm | |
163 | ||
164 | ; Whether -da was passed (used only in handle_common_deferred_options). | |
165 | Variable | |
166 | bool flag_dump_all_passed | |
167 | ||
168 | ; Other flags saying which kinds of debugging dump have been requested. | |
169 | ||
170 | Variable | |
171 | int rtl_dump_and_exit | |
172 | ||
173 | Variable | |
174 | int flag_print_asm_name | |
175 | ||
a803773f JM |
176 | ; Name of top-level original source file (what was input to cpp). |
177 | ; This comes from the #-command at the beginning of the actual input. | |
178 | ; If there isn't any there, then this is the cc1 input file name. | |
179 | Variable | |
180 | const char *main_input_filename | |
181 | ||
182 | ; Pointer to base name in main_input_filename, with directories and a | |
183 | ; single final extension removed, and the length of this base | |
184 | ; name. | |
185 | ||
186 | Variable | |
187 | const char *main_input_basename | |
188 | ||
189 | Variable | |
190 | int main_input_baselength | |
191 | ||
299404a1 JM |
192 | ; Which options have been printed by --help. |
193 | Variable | |
194 | char *help_printed | |
195 | ||
e6d4b984 JM |
196 | ; Which enums have been printed by --help. 0 = not printed, no |
197 | ; relevant options seen, 1 = relevant option seen, not yet printed, 2 | |
198 | ; = printed. | |
199 | Variable | |
200 | char *help_enum_printed | |
201 | ||
299404a1 JM |
202 | ; The number of columns for --help output. |
203 | Variable | |
204 | unsigned int help_columns | |
205 | ||
206 | ; Whether this options structure has been through finish_options | |
207 | Variable | |
208 | bool flag_opts_finished | |
209 | ||
de5a5fa1 MP |
210 | ; What the sanitizer should instrument |
211 | Variable | |
212 | unsigned int flag_sanitize | |
213 | ||
91035653 JJ |
214 | ; Flag whether a prefix has been added to dump_base_name |
215 | Variable | |
216 | bool dump_base_name_prefixed = false | |
217 | ||
603349bf JM |
218 | ### |
219 | Driver | |
220 | ||
e200444e JM |
221 | -assemble |
222 | Driver Alias(S) | |
223 | ||
224 | -compile | |
225 | Driver Alias(c) | |
226 | ||
227 | -coverage | |
228 | Driver Alias(coverage) | |
229 | ||
230 | -debug | |
231 | Common Alias(g) | |
232 | ||
233 | -dump | |
234 | Common Separate Alias(d) | |
235 | ||
236 | -dump= | |
237 | Common Joined Alias(d) | |
238 | ||
239 | -dumpbase | |
240 | Common Separate Alias(dumpbase) | |
241 | ||
242 | -dumpdir | |
243 | Common Separate Alias(dumpdir) | |
244 | ||
245 | -entry | |
246 | Driver Separate Alias(e) | |
247 | ||
248 | -entry= | |
249 | Driver Joined Alias(e) | |
250 | ||
251 | -extra-warnings | |
252 | Common Warning Alias(Wextra) | |
253 | ||
254 | -for-assembler | |
255 | Driver Separate Alias(Xassembler) | |
256 | ||
257 | -for-assembler= | |
258 | Driver JoinedOrMissing Alias(Xassembler) | |
259 | ||
260 | -for-linker | |
261 | Driver Separate Alias(Xlinker) | |
262 | ||
263 | -for-linker= | |
264 | Driver JoinedOrMissing Alias(Xlinker) | |
265 | ||
266 | -force-link | |
267 | Driver Separate Alias(u) | |
268 | ||
269 | -force-link= | |
270 | Driver Joined Alias(u) | |
271 | ||
d185d268 | 272 | -help |
e200444e | 273 | Common Driver Var(help_flag) |
cf03fd63 | 274 | Display this information |
d185d268 | 275 | |
c662432e | 276 | -help= |
603349bf | 277 | Common Driver Report Joined |
c662432e | 278 | --help=<class> Display descriptions of a specific class of options. <class> is one or more of optimizers, target, warnings, undocumented, params |
903caebf | 279 | |
e200444e JM |
280 | -language |
281 | Driver Separate Alias(x) | |
282 | ||
283 | -language= | |
284 | Driver Joined Alias(x) | |
285 | ||
286 | -library-directory | |
287 | Driver Separate Alias(L) | |
288 | ||
289 | -library-directory= | |
290 | Driver Joined Alias(L) | |
291 | ||
292 | -no-canonical-prefixes | |
293 | Driver Alias(no-canonical-prefixes) | |
294 | ||
295 | -no-standard-libraries | |
296 | Driver Alias(nostdlib) | |
297 | ||
28b4fc51 JM |
298 | -no-sysroot-suffix |
299 | Driver Var(no_sysroot_suffix) | |
300 | ||
e200444e JM |
301 | -no-warnings |
302 | Common Alias(w) | |
303 | ||
304 | -optimize | |
305 | Common Alias(O) | |
306 | ||
307 | -output | |
308 | Common Driver Separate Alias(o) MissingArgError(missing filename after %qs) | |
309 | ||
310 | -output= | |
311 | Common Driver Joined Alias(o) MissingArgError(missing filename after %qs) | |
312 | ||
313 | -pass-exit-codes | |
314 | Driver Alias(pass-exit-codes) | |
315 | ||
316 | -pedantic | |
c1771a20 | 317 | Common Alias(Wpedantic) |
e200444e JM |
318 | |
319 | -pedantic-errors | |
320 | Common Alias(pedantic-errors) | |
321 | ||
322 | -pie | |
5460e1fc | 323 | Driver Alias(pie) |
e200444e JM |
324 | |
325 | -pipe | |
326 | Driver Alias(pipe) | |
327 | ||
328 | -prefix | |
329 | Driver Separate Alias(B) | |
330 | ||
331 | -prefix= | |
332 | Driver JoinedOrMissing Alias(B) | |
333 | ||
334 | -preprocess | |
335 | Driver Alias(E) | |
336 | ||
337 | -print-file-name | |
338 | Driver Separate Alias(print-file-name=) | |
339 | ||
340 | -print-file-name= | |
341 | Driver JoinedOrMissing Alias(print-file-name=) | |
342 | ||
343 | -print-libgcc-file-name | |
344 | Driver Alias(print-libgcc-file-name) | |
345 | ||
346 | -print-multi-directory | |
347 | Driver Alias(print-multi-directory) | |
348 | ||
349 | -print-multi-lib | |
350 | Driver Alias(print-multi-lib) | |
351 | ||
352 | -print-multi-os-directory | |
353 | Driver Alias(print-multi-os-directory) | |
354 | ||
e0cdc09f MK |
355 | -print-multiarch |
356 | Driver Alias(print-multiarch) | |
357 | ||
e200444e JM |
358 | -print-prog-name |
359 | Driver Separate Alias(print-prog-name=) | |
360 | ||
361 | -print-prog-name= | |
362 | Driver JoinedOrMissing Alias(print-prog-name=) | |
363 | ||
364 | -print-search-dirs | |
365 | Driver Alias(print-search-dirs) | |
366 | ||
367 | -print-sysroot | |
368 | Driver Alias(print-sysroot) | |
369 | ||
370 | -print-sysroot-headers-suffix | |
371 | Driver Alias(print-sysroot-headers-suffix) | |
372 | ||
373 | -profile | |
374 | Common Alias(p) | |
375 | ||
376 | -save-temps | |
377 | Driver Alias(save-temps) | |
378 | ||
379 | -shared | |
5460e1fc | 380 | Driver Alias(shared) |
e200444e JM |
381 | |
382 | -specs | |
383 | Driver Separate Alias(specs=) | |
384 | ||
385 | -specs= | |
386 | Driver Joined Alias(specs=) | |
387 | ||
388 | -static | |
389 | Driver Alias(static) | |
390 | ||
391 | -symbolic | |
392 | Driver Alias(symbolic) | |
393 | ||
d185d268 | 394 | -target-help |
603349bf | 395 | Common Driver |
c662432e NC |
396 | Alias for --help=target |
397 | ||
e200444e JM |
398 | -time |
399 | Driver Alias(time) | |
400 | ||
401 | -verbose | |
402 | Driver Alias(v) | |
403 | ||
404 | ;; The driver used to convert options such as --help into forms such | |
405 | ;; as -fhelp; the following four entries are for compatibility with | |
406 | ;; any direct uses of those (undocumented) -f forms | |
c662432e | 407 | fhelp |
e200444e | 408 | Common Driver Alias(-help) |
c662432e NC |
409 | |
410 | fhelp= | |
e200444e | 411 | Common Driver Joined Alias(-help=) |
c662432e NC |
412 | |
413 | ftarget-help | |
e200444e | 414 | Common Driver Alias(-target-help) |
c662432e | 415 | |
41fd0f9b | 416 | fversion |
e200444e | 417 | Common Driver Alias(-version) |
41fd0f9b | 418 | |
c662432e NC |
419 | -param |
420 | Common Separate | |
421 | --param <param>=<value> Set parameter <param> to value. See below for a complete list of parameters | |
d185d268 | 422 | |
e200444e JM |
423 | -param= |
424 | Common Joined Alias(-param) | |
425 | ||
426 | -sysroot | |
427 | Driver Separate Alias(-sysroot=) | |
428 | ||
603349bf JM |
429 | -sysroot= |
430 | Driver JoinedOrMissing | |
431 | ||
d185d268 | 432 | -version |
603349bf JM |
433 | Common Driver |
434 | ||
435 | B | |
436 | Driver Joined Separate | |
437 | ||
438 | E | |
439 | Driver | |
d185d268 | 440 | |
d9d16a19 JM |
441 | L |
442 | Driver Joined Separate | |
443 | ||
dd9f93dc JM |
444 | N |
445 | Driver | |
446 | ||
903caebf | 447 | O |
ab442df7 | 448 | Common JoinedOrMissing Optimization |
cf03fd63 | 449 | -O<number> Set optimization level to <number> |
903caebf NB |
450 | |
451 | Os | |
ab442df7 | 452 | Common Optimization |
cf03fd63 | 453 | Optimize for space rather than speed |
903caebf | 454 | |
be6d3f0e RG |
455 | Ofast |
456 | Common Optimization | |
457 | Optimize for speed disregarding exact standards compliance | |
458 | ||
bf7a7185 RG |
459 | Og |
460 | Common Optimization | |
461 | Optimize for debugging experience rather than speed or size | |
462 | ||
dd9f93dc JM |
463 | Q |
464 | Driver | |
465 | ||
466 | Qn | |
467 | Driver Negative(Qy) | |
468 | ||
469 | Qy | |
470 | Driver Negative(Qn) | |
471 | ||
6d721f67 JM |
472 | R |
473 | Driver Joined Separate | |
474 | ||
603349bf JM |
475 | S |
476 | Driver | |
477 | ||
6d721f67 JM |
478 | T |
479 | Driver Joined Separate | |
480 | ||
481 | Tbss | |
482 | Driver Separate | |
483 | ||
e69d7376 JM |
484 | Tbss= |
485 | Driver Joined | |
486 | ||
6d721f67 JM |
487 | Tdata |
488 | Driver Separate | |
489 | ||
e69d7376 JM |
490 | Tdata= |
491 | Driver Joined | |
492 | ||
6d721f67 JM |
493 | Ttext |
494 | Driver Separate | |
495 | ||
e69d7376 JM |
496 | Ttext= |
497 | Driver Joined | |
498 | ||
903caebf | 499 | W |
5de8299c | 500 | Common RejectNegative Warning Alias(Wextra) |
28786366 | 501 | This switch is deprecated; use -Wextra instead |
903caebf | 502 | |
603349bf JM |
503 | Wa, |
504 | Driver JoinedOrMissing | |
505 | ||
506 | Wl, | |
507 | Driver JoinedOrMissing | |
508 | ||
509 | Wp, | |
510 | Driver JoinedOrMissing | |
511 | ||
e01cc6dc | 512 | Waggregate-return |
c662432e | 513 | Common Var(warn_aggregate_return) Warning |
28786366 | 514 | Warn about returning structures, unions or arrays |
e01cc6dc | 515 | |
fbd28bc3 JJ |
516 | Waggressive-loop-optimizations |
517 | Common Var(warn_aggressive_loop_optimizations) Init(1) Warning | |
518 | Warn if a loop with constant number of iterations triggers undefined behavior | |
519 | ||
590b1f2d | 520 | Warray-bounds |
21af5cdf | 521 | Common Var(warn_array_bounds) Warning |
590b1f2d DM |
522 | Warn if an array is accessed out of bounds |
523 | ||
5c498b10 | 524 | Wattributes |
c662432e | 525 | Common Var(warn_attributes) Init(1) Warning |
5c498b10 DD |
526 | Warn about inappropriate attribute usage |
527 | ||
e01cc6dc | 528 | Wcast-align |
c662432e | 529 | Common Var(warn_cast_align) Warning |
28786366 | 530 | Warn about pointer casts which increase alignment |
e01cc6dc | 531 | |
87cf0651 SB |
532 | Wcpp |
533 | Common Var(warn_cpp) Init(1) Warning | |
534 | Warn when a #warning directive is encountered | |
535 | ||
e01cc6dc | 536 | Wdeprecated-declarations |
c662432e | 537 | Common Var(warn_deprecated_decl) Init(1) Warning |
28786366 | 538 | Warn about uses of __attribute__((deprecated)) declarations |
e01cc6dc NB |
539 | |
540 | Wdisabled-optimization | |
c662432e | 541 | Common Var(warn_disabled_optimization) Warning |
28786366 | 542 | Warn when an optimization pass is disabled |
e01cc6dc NB |
543 | |
544 | Werror | |
50431bc4 | 545 | Common Var(warnings_are_errors) |
28786366 | 546 | Treat all warnings as errors |
e01cc6dc | 547 | |
79cf5994 DD |
548 | Werror= |
549 | Common Joined | |
550 | Treat specified warning as error | |
551 | ||
903caebf | 552 | Wextra |
62a67c94 | 553 | Common Var(extra_warnings) Warning |
cf03fd63 | 554 | Print extra (possibly unwanted) warnings |
903caebf | 555 | |
c65a01af | 556 | Wfatal-errors |
50431bc4 | 557 | Common Var(flag_fatal_errors) |
c65a01af RG |
558 | Exit on the first error occurred |
559 | ||
a214518f SP |
560 | Wframe-larger-than= |
561 | Common RejectNegative Joined UInteger | |
f94e1d66 | 562 | -Wframe-larger-than=<number> Warn if a function's stack frame requires more than <number> bytes |
a214518f | 563 | |
a3a704a4 MH |
564 | Wfree-nonheap-object |
565 | Common Var(warn_free_nonheap_object) Init(1) Warning | |
566 | Warn when attempting to free a non-heap object | |
567 | ||
e01cc6dc | 568 | Winline |
c662432e | 569 | Common Var(warn_inline) Warning |
28786366 | 570 | Warn when an inlined function cannot be inlined |
e01cc6dc | 571 | |
86951993 AM |
572 | Winvalid-memory-model |
573 | Common Var(warn_invalid_memory_model) Init(1) Warning | |
574 | Warn when an atomic memory model parameter is known to be outside the valid range. | |
575 | ||
e01cc6dc | 576 | Wlarger-than- |
5de8299c | 577 | Common RejectNegative Joined Warning Undocumented Alias(Wlarger-than=) |
e8fc888d MLI |
578 | |
579 | Wlarger-than= | |
580 | Common RejectNegative Joined UInteger Warning | |
581 | -Wlarger-than=<number> Warn if an object is larger than <number> bytes | |
e01cc6dc | 582 | |
f9cc1a70 | 583 | Wunsafe-loop-optimizations |
c662432e | 584 | Common Var(warn_unsafe_loop_optimizations) Warning |
f9cc1a70 PB |
585 | Warn if the loop cannot be optimized due to nontrivial assumptions. |
586 | ||
e01cc6dc | 587 | Wmissing-noreturn |
94ee6979 | 588 | Common Alias(Wsuggest-attribute=noreturn) |
e01cc6dc | 589 | |
71834ad3 | 590 | Woverflow |
c662432e | 591 | Common Var(warn_overflow) Init(1) Warning |
71834ad3 RS |
592 | Warn about overflow in arithmetic expressions |
593 | ||
e01cc6dc | 594 | Wpacked |
c662432e | 595 | Common Var(warn_packed) Warning |
28786366 | 596 | Warn when the packed attribute has no effect on struct layout |
e01cc6dc NB |
597 | |
598 | Wpadded | |
c662432e | 599 | Common Var(warn_padded) Warning |
28786366 | 600 | Warn when padding is required to align structure members |
e01cc6dc | 601 | |
c1771a20 MLI |
602 | Wpedantic |
603 | Common Var(pedantic) Warning | |
604 | Issue warnings needed for strict compliance to the standard | |
605 | ||
e01cc6dc | 606 | Wshadow |
c662432e | 607 | Common Var(warn_shadow) Warning |
28786366 | 608 | Warn when one local variable shadows another |
e01cc6dc | 609 | |
7d69de61 | 610 | Wstack-protector |
c662432e | 611 | Common Var(warn_stack_protect) Warning |
7d69de61 RH |
612 | Warn when not issuing stack smashing protection for some reason |
613 | ||
a11e0df4 EB |
614 | Wstack-usage= |
615 | Common Joined RejectNegative UInteger Var(warn_stack_usage) Init(-1) Warning | |
616 | Warn if stack usage might be larger than specified amount | |
617 | ||
e01cc6dc | 618 | Wstrict-aliasing |
c662432e | 619 | Common Warning |
28786366 | 620 | Warn about code which might break strict aliasing rules |
e01cc6dc | 621 | |
5399d643 | 622 | Wstrict-aliasing= |
65d4f2cd | 623 | Common Joined RejectNegative UInteger Var(warn_strict_aliasing) Warning |
5399d643 JW |
624 | Warn about code which might break strict aliasing rules |
625 | ||
6ac01510 | 626 | Wstrict-overflow |
21af5cdf | 627 | Common Warning |
6ac01510 ILT |
628 | Warn about optimizations that assume that signed overflow is undefined |
629 | ||
630 | Wstrict-overflow= | |
65d4f2cd | 631 | Common Joined RejectNegative UInteger Var(warn_strict_overflow) Warning |
6ac01510 ILT |
632 | Warn about optimizations that assume that signed overflow is undefined |
633 | ||
5dc16b19 MLI |
634 | Wsuggest-attribute=const |
635 | Common Var(warn_suggest_attribute_const) Warning | |
636 | Warn about functions which might be candidates for __attribute__((const)) | |
637 | ||
638 | Wsuggest-attribute=pure | |
639 | Common Var(warn_suggest_attribute_pure) Warning | |
640 | Warn about functions which might be candidates for __attribute__((pure)) | |
641 | ||
7ea6b6cf JH |
642 | Wsuggest-attribute=noreturn |
643 | Common Var(warn_suggest_attribute_noreturn) Warning | |
644 | Warn about functions which might be candidates for __attribute__((noreturn)) | |
645 | ||
e01cc6dc | 646 | Wsystem-headers |
c662432e | 647 | Common Var(warn_system_headers) Warning |
f3fdaec4 | 648 | Do not suppress warnings from system headers |
e01cc6dc | 649 | |
8ffadef9 MG |
650 | Wtrampolines |
651 | Common Var(warn_trampolines) Warning | |
652 | Warn whenever a trampoline is generated | |
653 | ||
faebccf9 | 654 | Wtype-limits |
95744782 | 655 | Common Var(warn_type_limits) Warning EnabledBy(Wextra) |
faebccf9 DN |
656 | Warn if a comparison is always true or always false due to the limited range of the data type |
657 | ||
e01cc6dc | 658 | Wuninitialized |
7d5a5747 | 659 | Common Var(warn_uninitialized) Warning EnabledBy(Wextra) |
28786366 | 660 | Warn about uninitialized automatic variables |
e01cc6dc | 661 | |
2f964ad6 | 662 | Wmaybe-uninitialized |
7d5a5747 | 663 | Common Var(warn_maybe_uninitialized) Warning EnabledBy(Wuninitialized) |
2f964ad6 XDL |
664 | Warn about maybe uninitialized automatic variables |
665 | ||
e01cc6dc | 666 | Wunreachable-code |
2d2bd949 | 667 | Common Ignore |
bc3c12a2 | 668 | Does nothing. Preserved for backward compatibility. |
e01cc6dc | 669 | |
903caebf | 670 | Wunused |
e73f7547 | 671 | Common Var(warn_unused) Init(0) Warning |
cf03fd63 | 672 | Enable all -Wunused- warnings |
903caebf | 673 | |
ebfbbdc5 | 674 | Wunused-but-set-parameter |
d919140b | 675 | Common Var(warn_unused_but_set_parameter) Warning EnabledBy(Wunused && Wextra) |
ebfbbdc5 JJ |
676 | Warn when a function parameter is only set, otherwise unused |
677 | ||
678 | Wunused-but-set-variable | |
7d5a5747 | 679 | Common Var(warn_unused_but_set_variable) Warning EnabledBy(Wunused) |
ebfbbdc5 JJ |
680 | Warn when a variable is only set, otherwise unused |
681 | ||
e01cc6dc | 682 | Wunused-function |
7d5a5747 | 683 | Common Var(warn_unused_function) Warning EnabledBy(Wunused) |
28786366 | 684 | Warn when a function is unused |
e01cc6dc NB |
685 | |
686 | Wunused-label | |
7d5a5747 | 687 | Common Var(warn_unused_label) Warning EnabledBy(Wunused) |
28786366 | 688 | Warn when a label is unused |
e01cc6dc NB |
689 | |
690 | Wunused-parameter | |
d919140b | 691 | Common Var(warn_unused_parameter) Warning EnabledBy(Wunused && Wextra) |
28786366 | 692 | Warn when a function parameter is unused |
e01cc6dc NB |
693 | |
694 | Wunused-value | |
7d5a5747 | 695 | Common Var(warn_unused_value) Warning EnabledBy(Wunused) |
28786366 | 696 | Warn when an expression value is unused |
e01cc6dc NB |
697 | |
698 | Wunused-variable | |
7d5a5747 | 699 | Common Var(warn_unused_variable) Warning EnabledBy(Wunused) |
28786366 | 700 | Warn when a variable is unused |
e01cc6dc | 701 | |
16c1c158 | 702 | Wcoverage-mismatch |
650cfcab NV |
703 | Common Var(warn_coverage_mismatch) Init(1) Warning |
704 | Warn in case profiles in -fprofile-use do not match | |
16c1c158 | 705 | |
cdbb5ba3 AS |
706 | Wvector-operation-performance |
707 | Common Var(warn_vector_operation_performance) Warning | |
708 | Warn when a vector operation is compiled outside the SIMD | |
709 | ||
603349bf JM |
710 | Xassembler |
711 | Driver Separate | |
712 | ||
713 | Xlinker | |
714 | Driver Separate | |
715 | ||
716 | Xpreprocessor | |
717 | Driver Separate | |
718 | ||
dd9f93dc JM |
719 | Z |
720 | Driver | |
721 | ||
d185d268 | 722 | aux-info |
d5478783 | 723 | Common Separate Var(aux_info_file_name) |
cf03fd63 | 724 | -aux-info <file> Emit declaration information into <file> |
d185d268 NB |
725 | |
726 | aux-info= | |
5de8299c | 727 | Common Joined Alias(aux-info) |
d185d268 NB |
728 | |
729 | auxbase | |
d5478783 | 730 | Common Separate RejectDriver Var(aux_base_name) |
d185d268 NB |
731 | |
732 | auxbase-strip | |
603349bf JM |
733 | Common Separate RejectDriver |
734 | ||
e200444e JM |
735 | coverage |
736 | Driver | |
737 | ||
603349bf JM |
738 | c |
739 | Driver | |
d185d268 NB |
740 | |
741 | d | |
742 | Common Joined | |
cf03fd63 | 743 | -d<letters> Enable dumps from specific passes of the compiler |
d185d268 NB |
744 | |
745 | dumpbase | |
d5478783 | 746 | Common Separate Var(dump_base_name) |
cf03fd63 | 747 | -dumpbase <file> Set the file basename to be used for dumps |
d185d268 | 748 | |
d7fb0a6d | 749 | dumpdir |
d5478783 | 750 | Common Separate Var(dump_dir_name) |
316fc112 | 751 | -dumpdir <dir> Set the directory name to be used for dumps |
d7fb0a6d | 752 | |
603349bf JM |
753 | dumpmachine |
754 | Driver | |
755 | ||
756 | dumpspecs | |
757 | Driver | |
758 | ||
759 | dumpversion | |
760 | Driver | |
761 | ||
e200444e JM |
762 | e |
763 | Driver Joined Separate | |
764 | ||
fa381cb2 JM |
765 | ; This option has historically been passed down to the linker by an |
766 | ; accident of a %{e*} spec, so ensure it continues to be passed down | |
767 | ; as a single option. The supported option for this purpose is | |
768 | ; -rdynamic. See PR 47390. | |
769 | export-dynamic | |
770 | Driver Undocumented | |
771 | ||
31b66477 KC |
772 | ; The version of the C++ ABI in use. The following values are allowed: |
773 | ; | |
774 | ; 0: The version of the ABI believed most conformant with the C++ ABI | |
775 | ; specification. This ABI may change as bugs are discovered and fixed. | |
776 | ; Therefore, 0 will not necessarily indicate the same ABI in different | |
777 | ; versions of G++. | |
778 | ; | |
90d84934 | 779 | ; 1: The version of the ABI first used in G++ 3.2. No longer selectable. |
31b66477 | 780 | ; |
abfe01ce JM |
781 | ; 2: The version of the ABI first used in G++ 3.4 (and current default). |
782 | ; | |
783 | ; 3: The version of the ABI that fixes the missing underscore | |
784 | ; in template non-type arguments of pointer type. | |
785 | ; | |
786 | ; 4: The version of the ABI that introduces unambiguous mangling of | |
55af847f | 787 | ; vector types. First selectable in G++ 4.5. |
99a8d35b | 788 | ; |
67e18edb | 789 | ; 5: The version of the ABI that ignores attribute const/noreturn |
55af847f | 790 | ; in function pointer mangling, and corrects mangling of decltype and |
67e18edb | 791 | ; function parameters used in other parameters and the return type. |
55af847f | 792 | ; First selectable in G++ 4.6. |
67e18edb | 793 | ; |
4b6aaa99 JM |
794 | ; 6: The version of the ABI that doesn't promote scoped enums to int and |
795 | ; changes the mangling of template argument packs, const/static_cast, | |
796 | ; prefix ++ and --, and a class scope function used as a template | |
797 | ; argument. | |
967444bb JM |
798 | ; First selectable in G++ 4.7. |
799 | ; | |
622aac0b JM |
800 | ; 7: The version of the ABI that treats nullptr_t as a builtin type and |
801 | ; corrects the mangling of lambdas in default argument scope. | |
a3ddb738 | 802 | ; First selectable in G++ 4.8. |
0861bec8 JM |
803 | ; |
804 | ; 8: The version of the ABI that corrects the substitution behavior of | |
805 | ; function types with function-cv-qualifiers. | |
806 | ; First selectable in G++ 4.9. | |
807 | ; | |
31b66477 KC |
808 | ; Additional positive integers will be assigned as new versions of |
809 | ; the ABI become the default version of the ABI. | |
57782ad8 | 810 | fabi-version= |
fcfbd84e | 811 | Common Joined RejectNegative UInteger Var(flag_abi_version) Init(2) |
57782ad8 | 812 | |
6e616110 RB |
813 | faggressive-loop-optimizations |
814 | Common Report Var(flag_aggressive_loop_optimizations) Optimization Init(1) | |
815 | Aggressively optimize loops using language constraints | |
816 | ||
6ff3a151 | 817 | falign-functions |
ab442df7 | 818 | Common Report Var(align_functions,0) Optimization UInteger |
f3fdaec4 | 819 | Align the start of functions |
6ff3a151 | 820 | |
058de654 | 821 | falign-functions= |
d5478783 | 822 | Common RejectNegative Joined UInteger Var(align_functions) |
058de654 | 823 | |
6ff3a151 | 824 | falign-jumps |
ab442df7 | 825 | Common Report Var(align_jumps,0) Optimization UInteger |
f3fdaec4 | 826 | Align labels which are only reached by jumping |
6ff3a151 | 827 | |
058de654 | 828 | falign-jumps= |
d5478783 | 829 | Common RejectNegative Joined UInteger Var(align_jumps) |
058de654 | 830 | |
6ff3a151 | 831 | falign-labels |
ab442df7 | 832 | Common Report Var(align_labels,0) Optimization UInteger |
f3fdaec4 | 833 | Align all labels |
6ff3a151 | 834 | |
058de654 | 835 | falign-labels= |
d5478783 | 836 | Common RejectNegative Joined UInteger Var(align_labels) |
058de654 | 837 | |
6ff3a151 | 838 | falign-loops |
3020190e | 839 | Common Report Var(align_loops,0) Optimization UInteger |
f3fdaec4 | 840 | Align the start of loops |
6ff3a151 | 841 | |
058de654 | 842 | falign-loops= |
d5478783 | 843 | Common RejectNegative Joined UInteger Var(align_loops) |
058de654 | 844 | |
6ff3a151 | 845 | fargument-alias |
2d2bd949 | 846 | Common Ignore |
0d3c82d6 | 847 | Does nothing. Preserved for backward compatibility. |
6ff3a151 NB |
848 | |
849 | fargument-noalias | |
2d2bd949 | 850 | Common Ignore |
0d3c82d6 | 851 | Does nothing. Preserved for backward compatibility. |
6ff3a151 NB |
852 | |
853 | fargument-noalias-global | |
2d2bd949 | 854 | Common Ignore |
0d3c82d6 | 855 | Does nothing. Preserved for backward compatibility. |
6ff3a151 | 856 | |
0698a1d2 | 857 | fargument-noalias-anything |
2d2bd949 | 858 | Common Ignore |
0d3c82d6 | 859 | Does nothing. Preserved for backward compatibility. |
0698a1d2 | 860 | |
de5a5fa1 MP |
861 | fsanitize= |
862 | Common Driver Report Joined | |
863 | Select what to sanitize | |
32b4b7f5 | 864 | |
1c33c9b7 JJ |
865 | fsanitize-recover |
866 | Common Report Var(flag_sanitize_recover) Init(1) | |
867 | After diagnosing undefined behavior attempt to continue execution | |
868 | ||
869 | fsanitize-undefined-trap-on-error | |
870 | Common Report Var(flag_sanitize_undefined_trap_on_error) Init(0) | |
871 | Use trap instead of a library function for undefined behavior sanitization | |
872 | ||
6ff3a151 | 873 | fasynchronous-unwind-tables |
c662432e | 874 | Common Report Var(flag_asynchronous_unwind_tables) Optimization |
f3fdaec4 | 875 | Generate unwind tables that are exact at each instruction boundary |
6ff3a151 | 876 | |
6fb5fa3c DB |
877 | fauto-inc-dec |
878 | Common Report Var(flag_auto_inc_dec) Init(1) | |
879 | Generate auto-inc/dec instructions | |
880 | ||
31b66477 KC |
881 | ; -fcheck-bounds causes gcc to generate array bounds checks. |
882 | ; For C, C++ and ObjC: defaults off. | |
883 | ; For Java: defaults to on. | |
884 | ; For Fortran: defaults to off. | |
6ff3a151 | 885 | fbounds-check |
50431bc4 | 886 | Common Report Var(flag_bounds_check) |
f3fdaec4 | 887 | Generate code to check bounds before indexing arrays |
6ff3a151 NB |
888 | |
889 | fbranch-count-reg | |
14379e66 | 890 | Common Report Var(flag_branch_on_count_reg) Optimization |
f3fdaec4 | 891 | Replace add, compare, branch with branch on count register |
6ff3a151 NB |
892 | |
893 | fbranch-probabilities | |
c662432e | 894 | Common Report Var(flag_branch_probabilities) Optimization |
f3fdaec4 | 895 | Use profiling information for branch probabilities |
6ff3a151 | 896 | |
de32c0cb | 897 | fbranch-target-load-optimize |
c662432e | 898 | Common Report Var(flag_branch_target_load_optimize) Optimization |
f3fdaec4 | 899 | Perform branch target load optimization before prologue / epilogue threading |
de32c0cb NB |
900 | |
901 | fbranch-target-load-optimize2 | |
c662432e | 902 | Common Report Var(flag_branch_target_load_optimize2) Optimization |
f3fdaec4 | 903 | Perform branch target load optimization after prologue / epilogue threading |
de32c0cb | 904 | |
1194fc79 | 905 | fbtr-bb-exclusive |
c662432e | 906 | Common Report Var(flag_btr_bb_exclusive) Optimization |
1194fc79 R |
907 | Restrict target load migration not to re-use registers in any basic block |
908 | ||
058de654 | 909 | fcall-saved- |
21bf1558 | 910 | Common Joined RejectNegative Var(common_deferred_options) Defer |
cf03fd63 | 911 | -fcall-saved-<register> Mark <register> as being preserved across functions |
058de654 NB |
912 | |
913 | fcall-used- | |
21bf1558 | 914 | Common Joined RejectNegative Var(common_deferred_options) Defer |
cf03fd63 | 915 | -fcall-used-<register> Mark <register> as being corrupted by function calls |
058de654 | 916 | |
31b66477 KC |
917 | ; Nonzero for -fcaller-saves: allocate values in regs that need to |
918 | ; be saved across function calls, if that produces overall better code. | |
919 | ; Optional now, so people can test it. | |
de32c0cb | 920 | fcaller-saves |
c662432e | 921 | Common Report Var(flag_caller_saves) Optimization |
f3fdaec4 | 922 | Save registers around function calls |
de32c0cb | 923 | |
3d8864c0 SP |
924 | fcheck-data-deps |
925 | Common Report Var(flag_check_data_deps) | |
926 | Compare the results of several data dependence analyzers. | |
927 | ||
2284b034 MG |
928 | fcheck-new |
929 | Common Var(flag_check_new) | |
930 | Check the return value of new in C++ | |
931 | ||
ccaeeafe NC |
932 | fcombine-stack-adjustments |
933 | Common Report Var(flag_combine_stack_adjustments) Optimization | |
934 | Looks for opportunities to reduce stack adjustments and stack references. | |
935 | ||
6ff3a151 | 936 | fcommon |
c662432e | 937 | Common Report Var(flag_no_common,0) Optimization |
f3fdaec4 | 938 | Do not put uninitialized globals in the common section |
6ff3a151 | 939 | |
603349bf JM |
940 | fcompare-debug |
941 | Driver | |
942 | ; Converted by the driver to -fcompare-debug= options. | |
943 | ||
2153915d | 944 | fcompare-debug= |
603349bf | 945 | Common Driver JoinedOrMissing RejectNegative Var(flag_compare_debug_opt) |
f94e1d66 | 946 | -fcompare-debug[=<opts>] Compile with and without e.g. -gtoggle, and compare the final-insns dump |
2153915d AO |
947 | |
948 | fcompare-debug-second | |
5e471ea6 | 949 | Common Driver RejectNegative Var(flag_compare_debug) |
2153915d AO |
950 | Run only the second compilation of -fcompare-debug |
951 | ||
e692f276 RH |
952 | fcompare-elim |
953 | Common Report Var(flag_compare_elim_after_reload) Optimization | |
954 | Perform comparison elimination after register allocation has finished | |
955 | ||
b5b8b0ac AO |
956 | fconserve-stack |
957 | Common Var(flag_conserve_stack) Optimization | |
958 | Do not perform optimizations increasing noticeably stack usage | |
959 | ||
6ff3a151 | 960 | fcprop-registers |
c662432e | 961 | Common Report Var(flag_cprop_registers) Optimization |
f3fdaec4 | 962 | Perform a register copy-propagation optimization pass |
6ff3a151 | 963 | |
de32c0cb | 964 | fcrossjumping |
c662432e | 965 | Common Report Var(flag_crossjumping) Optimization |
f3fdaec4 | 966 | Perform cross-jumping optimization |
de32c0cb NB |
967 | |
968 | fcse-follow-jumps | |
c662432e | 969 | Common Report Var(flag_cse_follow_jumps) Optimization |
f3fdaec4 | 970 | When running CSE, follow jumps to their targets |
de32c0cb NB |
971 | |
972 | fcse-skip-blocks | |
2d2bd949 | 973 | Common Ignore |
5f39ad47 | 974 | Does nothing. Preserved for backward compatibility. |
de32c0cb | 975 | |
c7463669 | 976 | fcx-limited-range |
5e46b0c6 | 977 | Common Report Var(flag_cx_limited_range) Optimization SetByCombined |
c7463669 RH |
978 | Omit range reduction step when performing complex division |
979 | ||
35085f76 JB |
980 | fcx-fortran-rules |
981 | Common Report Var(flag_cx_fortran_rules) Optimization | |
982 | Complex multiplication and division follow Fortran rules | |
983 | ||
6ff3a151 | 984 | fdata-sections |
c662432e | 985 | Common Report Var(flag_data_sections) Optimization |
f3fdaec4 | 986 | Place data items into their own section |
6ff3a151 | 987 | |
0a090f42 | 988 | fdbg-cnt-list |
299404a1 | 989 | Common Report Var(common_deferred_options) Defer |
0a090f42 SP |
990 | List all available debugging counters with their limits and counts. |
991 | ||
6fb5fa3c | 992 | fdbg-cnt= |
299404a1 | 993 | Common RejectNegative Joined Var(common_deferred_options) Defer |
f94e1d66 | 994 | -fdbg-cnt=<counter>:<limit>[,<counter>:<limit>,...] Set the debug counter limit. |
6fb5fa3c | 995 | |
c8aea42c | 996 | fdebug-prefix-map= |
299404a1 | 997 | Common Joined RejectNegative Var(common_deferred_options) Defer |
c8aea42c PB |
998 | Map one directory name to another in debug information |
999 | ||
76f9db36 | 1000 | fdebug-types-section |
98095aa3 | 1001 | Common Report Var(flag_debug_types_section) Init(0) |
76f9db36 JJ |
1002 | Output .debug_types section when using DWARF v4 debuginfo. |
1003 | ||
31b66477 KC |
1004 | ; Nonzero for -fdefer-pop: don't pop args after each function call |
1005 | ; instead save them up to pop many calls' args with one insns. | |
de32c0cb | 1006 | fdefer-pop |
c662432e | 1007 | Common Report Var(flag_defer_pop) Optimization |
f3fdaec4 | 1008 | Defer popping functions args from stack until later |
de32c0cb NB |
1009 | |
1010 | fdelayed-branch | |
c662432e | 1011 | Common Report Var(flag_delayed_branch) Optimization |
f3fdaec4 | 1012 | Attempt to fill delay slots of branch instructions |
de32c0cb | 1013 | |
2da02156 EB |
1014 | fdelete-dead-exceptions |
1015 | Common Report Var(flag_delete_dead_exceptions) Init(0) | |
1016 | Delete dead instructions that may throw exceptions | |
1017 | ||
de32c0cb | 1018 | fdelete-null-pointer-checks |
1ad2f450 | 1019 | Common Report Var(flag_delete_null_pointer_checks) Init(1) Optimization |
f3fdaec4 | 1020 | Delete useless null pointer checks |
de32c0cb | 1021 | |
bbc9396b JH |
1022 | fdevirtualize-speculatively |
1023 | Common Report Var(flag_devirtualize_speculatively) Optimization | |
1024 | Perform speculative devirtualization | |
1025 | ||
ca1eedf6 JH |
1026 | fdevirtualize |
1027 | Common Report Var(flag_devirtualize) Optimization | |
1028 | Try to convert virtual calls to direct ones. | |
1029 | ||
de32c0cb | 1030 | fdiagnostics-show-location= |
e6d4b984 | 1031 | Common Joined RejectNegative Enum(diagnostic_prefixing_rule) |
cf03fd63 | 1032 | -fdiagnostics-show-location=[once|every-line] How often to emit source location at the beginning of line-wrapped diagnostics |
de32c0cb | 1033 | |
e6d4b984 JM |
1034 | ; Required for these enum values. |
1035 | SourceInclude | |
1036 | pretty-print.h | |
1037 | ||
1038 | Enum | |
1039 | Name(diagnostic_prefixing_rule) Type(int) | |
1040 | ||
1041 | EnumValue | |
1042 | Enum(diagnostic_prefixing_rule) String(once) Value(DIAGNOSTICS_SHOW_PREFIX_ONCE) | |
1043 | ||
1044 | EnumValue | |
1045 | Enum(diagnostic_prefixing_rule) String(every-line) Value(DIAGNOSTICS_SHOW_PREFIX_EVERY_LINE) | |
1046 | ||
9fec0042 MLI |
1047 | fdiagnostics-show-caret |
1048 | Common Var(flag_diagnostics_show_caret) Init(1) | |
1049 | Show the source line with a caret indicating the column | |
1050 | ||
4b84d650 JJ |
1051 | fdiagnostics-color |
1052 | Common Alias(fdiagnostics-color=,always,never) | |
1053 | ; | |
1054 | ||
1055 | fdiagnostics-color= | |
a2e836b2 | 1056 | Common Joined RejectNegative Var(flag_diagnostics_show_color) Enum(diagnostic_color_rule) Init(DIAGNOSTICS_COLOR_NO) |
4b84d650 JJ |
1057 | -fdiagnostics-color=[never|always|auto] Colorize diagnostics |
1058 | ||
1059 | ; Required for these enum values. | |
1060 | SourceInclude | |
1061 | diagnostic-color.h | |
1062 | ||
1063 | Enum | |
1064 | Name(diagnostic_color_rule) Type(int) | |
1065 | ||
1066 | EnumValue | |
1067 | Enum(diagnostic_color_rule) String(never) Value(DIAGNOSTICS_COLOR_NO) | |
1068 | ||
1069 | EnumValue | |
1070 | Enum(diagnostic_color_rule) String(always) Value(DIAGNOSTICS_COLOR_YES) | |
1071 | ||
1072 | EnumValue | |
1073 | Enum(diagnostic_color_rule) String(auto) Value(DIAGNOSTICS_COLOR_AUTO) | |
1074 | ||
ccf08a6e | 1075 | fdiagnostics-show-option |
c7d0de89 | 1076 | Common Var(flag_diagnostics_show_option) Init(1) |
c85ce869 | 1077 | Amend appropriate diagnostic messages with the command line option that controls them |
ccf08a6e | 1078 | |
226c52aa XDL |
1079 | fdisable- |
1080 | Common Joined RejectNegative Var(common_deferred_options) Defer | |
1081 | -fdisable-[tree|rtl|ipa]-<pass>=range1+range2 disables an optimization pass | |
1082 | ||
1083 | fenable- | |
1084 | Common Joined RejectNegative Var(common_deferred_options) Defer | |
1085 | -fenable-[tree|rtl|ipa]-<pass>=range1+range2 enables an optimization pass | |
1086 | ||
6de9cd9a | 1087 | fdump- |
21bf1558 | 1088 | Common Joined RejectNegative Var(common_deferred_options) Defer |
6de9cd9a DN |
1089 | -fdump-<type> Dump various compiler internals to a file |
1090 | ||
d1583032 JM |
1091 | fdump-final-insns |
1092 | Driver RejectNegative | |
1093 | ||
2153915d AO |
1094 | fdump-final-insns= |
1095 | Common RejectNegative Joined Var(flag_dump_final_insns) | |
1096 | -fdump-final-insns=filename Dump to filename the insns at the end of translation | |
1097 | ||
c6a13190 ILT |
1098 | fdump-go-spec= |
1099 | Common RejectNegative Joined Var(flag_dump_go_spec) | |
1100 | -fdump-go-spec=filename Write all declarations to file as Go code | |
1101 | ||
24a7799e R |
1102 | fdump-noaddr |
1103 | Common Report Var(flag_dump_noaddr) | |
1104 | Suppress output of addresses in debugging dumps | |
1105 | ||
deced1e2 XDL |
1106 | fdump-passes |
1107 | Common Var(flag_dump_passes) Init(0) | |
1108 | Dump optimization passes | |
1109 | ||
6ff3a151 | 1110 | fdump-unnumbered |
e90afde6 | 1111 | Common Report Var(flag_dump_unnumbered) |
24a7799e | 1112 | Suppress output of instruction numbers, line number notes and addresses in debugging dumps |
6ff3a151 | 1113 | |
2aa7c49b | 1114 | fdump-unnumbered-links |
e90afde6 | 1115 | Common Report Var(flag_dump_unnumbered_links) |
2aa7c49b AO |
1116 | Suppress output of previous and next insn numbers in debugging dumps |
1117 | ||
b5b8b0ac AO |
1118 | fdwarf2-cfi-asm |
1119 | Common Report Var(flag_dwarf2_cfi_asm) Init(HAVE_GAS_CFI_DIRECTIVE) | |
1120 | Enable CFI tables via GAS assembler directives. | |
1121 | ||
355866de | 1122 | fearly-inlining |
c662432e | 1123 | Common Report Var(flag_early_inlining) Init(1) Optimization |
355866de RG |
1124 | Perform early inlining |
1125 | ||
de32c0cb | 1126 | feliminate-dwarf2-dups |
50431bc4 | 1127 | Common Report Var(flag_eliminate_dwarf2_dups) |
f3fdaec4 | 1128 | Perform DWARF2 duplicate elimination |
de32c0cb | 1129 | |
07ffa034 MJ |
1130 | fipa-sra |
1131 | Common Report Var(flag_ipa_sra) Init(0) Optimization | |
1132 | Perform interprocedural reduction of aggregates | |
1133 | ||
6a08f7b3 | 1134 | feliminate-unused-debug-symbols |
50431bc4 | 1135 | Common Report Var(flag_debug_only_used_symbols) |
f3fdaec4 | 1136 | Perform unused type elimination in debug info |
6a08f7b3 | 1137 | |
de32c0cb | 1138 | feliminate-unused-debug-types |
50431bc4 | 1139 | Common Report Var(flag_eliminate_unused_debug_types) Init(1) |
f3fdaec4 | 1140 | Perform unused type elimination in debug info |
de32c0cb | 1141 | |
e713adf6 | 1142 | femit-class-debug-always |
eae8e474 | 1143 | Common Report Var(flag_emit_class_debug_always) Init(0) |
e713adf6 CD |
1144 | Do not suppress C++ class debug information. |
1145 | ||
6ff3a151 | 1146 | fexceptions |
c662432e | 1147 | Common Report Var(flag_exceptions) Optimization |
f3fdaec4 | 1148 | Enable exception handling |
6ff3a151 | 1149 | |
de32c0cb | 1150 | fexpensive-optimizations |
c662432e | 1151 | Common Report Var(flag_expensive_optimizations) Optimization |
f3fdaec4 | 1152 | Perform a number of minor, expensive optimizations |
de32c0cb | 1153 | |
8ce94e44 | 1154 | fexcess-precision= |
e6d4b984 | 1155 | Common Joined RejectNegative Enum(excess_precision) Var(flag_excess_precision_cmdline) Init(EXCESS_PRECISION_DEFAULT) |
8ce94e44 JM |
1156 | -fexcess-precision=[fast|standard] Specify handling of excess floating-point precision |
1157 | ||
e6d4b984 JM |
1158 | Enum |
1159 | Name(excess_precision) Type(enum excess_precision) UnknownError(unknown excess precision style %qs) | |
1160 | ||
1161 | EnumValue | |
1162 | Enum(excess_precision) String(fast) Value(EXCESS_PRECISION_FAST) | |
1163 | ||
1164 | EnumValue | |
1165 | Enum(excess_precision) String(standard) Value(EXCESS_PRECISION_STANDARD) | |
1166 | ||
058de654 NB |
1167 | ffast-math |
1168 | Common | |
1169 | ||
cc8547a7 | 1170 | ffat-lto-objects |
e9f67e62 | 1171 | Common Var(flag_fat_lto_objects) |
cc8547a7 AK |
1172 | Output lto objects containing both the intermediate language and binary output. |
1173 | ||
6ff3a151 | 1174 | ffinite-math-only |
5e46b0c6 | 1175 | Common Report Var(flag_finite_math_only) Optimization SetByCombined |
f3fdaec4 | 1176 | Assume no NaNs or infinities are generated |
6ff3a151 | 1177 | |
058de654 | 1178 | ffixed- |
21bf1558 | 1179 | Common Joined RejectNegative Var(common_deferred_options) Defer |
cf03fd63 | 1180 | -ffixed-<register> Mark <register> as being unavailable to the compiler |
058de654 | 1181 | |
de32c0cb | 1182 | ffloat-store |
c662432e | 1183 | Common Report Var(flag_float_store) Optimization |
31b66477 | 1184 | Don't allocate floats and doubles in extended-precision registers |
de32c0cb NB |
1185 | |
1186 | fforce-addr | |
2d2bd949 | 1187 | Common Ignore |
3de5e93a | 1188 | Does nothing. Preserved for backward compatibility. |
de32c0cb | 1189 | |
2ca2b607 SB |
1190 | fforward-propagate |
1191 | Common Report Var(flag_forward_propagate) Optimization | |
a52b023a PB |
1192 | Perform a forward propagation pass on RTL |
1193 | ||
16949072 | 1194 | ffp-contract= |
e6d4b984 | 1195 | Common Joined RejectNegative Enum(fp_contract_mode) Var(flag_fp_contract_mode) Init(FP_CONTRACT_FAST) |
16949072 RG |
1196 | -ffp-contract=[off|on|fast] Perform floating-point expression contraction. |
1197 | ||
e6d4b984 JM |
1198 | Enum |
1199 | Name(fp_contract_mode) Type(enum fp_contract_mode) UnknownError(unknown floating point contraction style %qs) | |
1200 | ||
1201 | EnumValue | |
1202 | Enum(fp_contract_mode) String(off) Value(FP_CONTRACT_OFF) | |
1203 | ||
1204 | ; Not implemented, fall back to conservative FP_CONTRACT_OFF. | |
1205 | EnumValue | |
1206 | Enum(fp_contract_mode) String(on) Value(FP_CONTRACT_OFF) | |
1207 | ||
1208 | EnumValue | |
1209 | Enum(fp_contract_mode) String(fast) Value(FP_CONTRACT_FAST) | |
1210 | ||
31b66477 KC |
1211 | ; Nonzero means don't put addresses of constant functions in registers. |
1212 | ; Used for compiling the Unix kernel, where strange substitutions are | |
1213 | ; done on the assembly output. | |
de32c0cb | 1214 | ffunction-cse |
50431bc4 | 1215 | Common Report Var(flag_no_function_cse,0) |
f3fdaec4 | 1216 | Allow function addresses to be held in registers |
de32c0cb | 1217 | |
6ff3a151 | 1218 | ffunction-sections |
50431bc4 | 1219 | Common Report Var(flag_function_sections) |
f3fdaec4 | 1220 | Place each function into its own section |
6ff3a151 | 1221 | |
de32c0cb | 1222 | fgcse |
c662432e | 1223 | Common Report Var(flag_gcse) Optimization |
f3fdaec4 | 1224 | Perform global common subexpression elimination |
de32c0cb NB |
1225 | |
1226 | fgcse-lm | |
c662432e | 1227 | Common Report Var(flag_gcse_lm) Init(1) Optimization |
f3fdaec4 | 1228 | Perform enhanced load motion during global common subexpression elimination |
de32c0cb NB |
1229 | |
1230 | fgcse-sm | |
c662432e | 1231 | Common Report Var(flag_gcse_sm) Init(0) Optimization |
f3fdaec4 | 1232 | Perform store motion after global common subexpression elimination |
de32c0cb | 1233 | |
f5f2e3cd | 1234 | fgcse-las |
c662432e | 1235 | Common Report Var(flag_gcse_las) Init(0) Optimization |
f9957958 MH |
1236 | Perform redundant load after store elimination in global common subexpression |
1237 | elimination | |
1238 | ||
1239 | fgcse-after-reload | |
c662432e | 1240 | Common Report Var(flag_gcse_after_reload) Optimization |
f9957958 | 1241 | Perform global common subexpression elimination after register allocation |
c85ce869 | 1242 | has finished |
f5f2e3cd | 1243 | |
d0a58904 | 1244 | ; This option is not documented yet as its semantics will change. |
f8bf9252 SP |
1245 | fgraphite |
1246 | Common Report Var(flag_graphite) | |
1247 | Enable in and out of Graphite representation | |
1248 | ||
204b560f SP |
1249 | fgraphite-identity |
1250 | Common Report Var(flag_graphite_identity) Optimization | |
1251 | Enable Graphite Identity transformation | |
1252 | ||
372a6eb8 BS |
1253 | fhoist-adjacent-loads |
1254 | Common Report Var(flag_hoist_adjacent_loads) Optimization | |
1255 | Enable hoisting adjacent loads to encourage generating conditional move | |
1256 | instructions | |
1257 | ||
3cf0e270 SP |
1258 | floop-parallelize-all |
1259 | Common Report Var(flag_loop_parallelize_all) Optimization | |
204b560f SP |
1260 | Mark all loops as parallel |
1261 | ||
f8bf9252 SP |
1262 | floop-strip-mine |
1263 | Common Report Var(flag_loop_strip_mine) Optimization | |
1264 | Enable Loop Strip Mining transformation | |
1265 | ||
1266 | floop-interchange | |
1267 | Common Report Var(flag_loop_interchange) Optimization | |
1268 | Enable Loop Interchange transformation | |
1269 | ||
1270 | floop-block | |
1271 | Common Report Var(flag_loop_block) Optimization | |
1272 | Enable Loop Blocking transformation | |
1273 | ||
0a35513e AH |
1274 | fgnu-tm |
1275 | Common Report Var(flag_tm) | |
1276 | Enable support for GNU transactional memory | |
1277 | ||
da34ade5 JM |
1278 | fgnu-unique |
1279 | Common Report Var(flag_gnu_unique) Init(1) | |
1280 | Use STB_GNU_UNIQUE if supported by the assembler | |
1281 | ||
98af4c9f | 1282 | floop-flatten |
093193be MK |
1283 | Common Ignore |
1284 | Does nothing. Preserved for backward compatibility. | |
98af4c9f | 1285 | |
b60cc080 TG |
1286 | floop-nest-optimize |
1287 | Common Report Var(flag_loop_optimize_isl) Optimization | |
1288 | Enable the ISL based loop nest optimizer | |
1289 | ||
6a78b724 DD |
1290 | fstrict-volatile-bitfields |
1291 | Common Report Var(flag_strict_volatile_bitfields) Init(-1) | |
1292 | Force bitfield accesses to match their type width | |
1293 | ||
6ff3a151 | 1294 | fguess-branch-probability |
c662432e | 1295 | Common Report Var(flag_guess_branch_prob) Optimization |
f3fdaec4 | 1296 | Enable guessing of branch probabilities |
6ff3a151 | 1297 | |
31b66477 KC |
1298 | ; Nonzero means ignore `#ident' directives. 0 means handle them. |
1299 | ; Generate position-independent code for executables if possible | |
1300 | ; On SVR4 targets, it also controls whether or not to emit a | |
1301 | ; string identifying the compiler. | |
6ff3a151 | 1302 | fident |
50431bc4 | 1303 | Common Report Var(flag_no_ident,0) |
f3fdaec4 | 1304 | Process #ident directives |
6ff3a151 | 1305 | |
de32c0cb | 1306 | fif-conversion |
c662432e | 1307 | Common Report Var(flag_if_conversion) Optimization |
f3fdaec4 | 1308 | Perform conversion of conditional jumps to branchless equivalents |
de32c0cb NB |
1309 | |
1310 | fif-conversion2 | |
c662432e | 1311 | Common Report Var(flag_if_conversion2) Optimization |
f3fdaec4 | 1312 | Perform conversion of conditional jumps to conditional execution |
de32c0cb | 1313 | |
87e2a8fd XDL |
1314 | fstack-reuse= |
1315 | Common Joined RejectNegative Enum(stack_reuse_level) Var(flag_stack_reuse) Init(SR_ALL) | |
1316 | -fstack-reuse=[all|named_vars|none] Set stack reuse level for local variables. | |
1317 | ||
1318 | Enum | |
1319 | Name(stack_reuse_level) Type(enum stack_reuse_level) UnknownError(unknown Stack Reuse Level %qs) | |
1320 | ||
1321 | EnumValue | |
1322 | Enum(stack_reuse_level) String(all) Value(SR_ALL) | |
1323 | ||
1324 | EnumValue | |
1325 | Enum(stack_reuse_level) String(named_vars) Value(SR_NAMED_VARS) | |
1326 | ||
1327 | EnumValue | |
1328 | Enum(stack_reuse_level) String(none) Value(SR_NONE) | |
1329 | ||
384a5197 SP |
1330 | ftree-loop-if-convert |
1331 | Common Report Var(flag_tree_loop_if_convert) Init(-1) Optimization | |
1332 | Convert conditional jumps in innermost loops to branchless equivalents | |
1333 | ||
bd544141 SP |
1334 | ftree-loop-if-convert-stores |
1335 | Common Report Var(flag_tree_loop_if_convert_stores) Optimization | |
1336 | Also if-convert conditional jumps containing memory writes | |
1337 | ||
31b66477 KC |
1338 | ; -finhibit-size-directive inhibits output of .size for ELF. |
1339 | ; This is used only for compiling crtstuff.c, | |
1340 | ; and it may be extended to other effects | |
1341 | ; needed for crtstuff.c on other systems. | |
6ff3a151 | 1342 | finhibit-size-directive |
50431bc4 | 1343 | Common Report Var(flag_inhibit_size_directive) |
f3fdaec4 | 1344 | Do not generate .size directives |
6ff3a151 | 1345 | |
3e293154 MJ |
1346 | findirect-inlining |
1347 | Common Report Var(flag_indirect_inlining) | |
1348 | Perform indirect inlining | |
1349 | ||
99ea07f8 RG |
1350 | ; General flag to enable inlining. Specifying -fno-inline will disable |
1351 | ; all inlining apart from always-inline functions. | |
de32c0cb | 1352 | finline |
0f042bc5 | 1353 | Common Report Var(flag_no_inline,0) Init(0) Optimization |
99ea07f8 | 1354 | Enable inlining of function declared \"inline\", disabling disables all inlining |
de32c0cb | 1355 | |
4d4b8cb9 JH |
1356 | finline-small-functions |
1357 | Common Report Var(flag_inline_small_functions) Optimization | |
99ea07f8 | 1358 | Integrate functions into their callers when code size is known not to grow |
4d4b8cb9 | 1359 | |
de32c0cb | 1360 | finline-functions |
c662432e | 1361 | Common Report Var(flag_inline_functions) Optimization |
99ea07f8 | 1362 | Integrate functions not declared \"inline\" into their callers when profitable |
de32c0cb | 1363 | |
355866de | 1364 | finline-functions-called-once |
fb37c1de | 1365 | Common Report Var(flag_inline_functions_called_once) Optimization |
99ea07f8 | 1366 | Integrate functions only required by their single caller |
d63db217 | 1367 | |
d302c9d6 | 1368 | finline-limit- |
5de8299c | 1369 | Common RejectNegative Joined Alias(finline-limit=) |
d302c9d6 NB |
1370 | |
1371 | finline-limit= | |
1372 | Common RejectNegative Joined UInteger | |
cf03fd63 | 1373 | -finline-limit=<number> Limit the size of inlined functions to <number> |
d302c9d6 | 1374 | |
86951993 AM |
1375 | finline-atomics |
1376 | Common Report Var(flag_inline_atomics) Init(1) Optimization | |
1377 | Inline __atomic operations when a lock free instruction sequence is available. | |
1378 | ||
6ff3a151 | 1379 | finstrument-functions |
50431bc4 | 1380 | Common Report Var(flag_instrument_function_entry_exit) |
f3fdaec4 | 1381 | Instrument function entry and exit with profiling calls |
6ff3a151 | 1382 | |
8d5a7d1f ILT |
1383 | finstrument-functions-exclude-function-list= |
1384 | Common RejectNegative Joined | |
1385 | -finstrument-functions-exclude-function-list=name,... Do not instrument listed functions | |
1386 | ||
1387 | finstrument-functions-exclude-file-list= | |
1388 | Common RejectNegative Joined | |
1389 | -finstrument-functions-exclude-file-list=filename,... Do not instrument functions listed in files | |
1390 | ||
d6e14e8f | 1391 | fipa-cp |
c662432e | 1392 | Common Report Var(flag_ipa_cp) Optimization |
bbc9396b | 1393 | Perform interprocedural constant propagation |
d6e14e8f | 1394 | |
5e45130d JH |
1395 | fipa-cp-clone |
1396 | Common Report Var(flag_ipa_cp_clone) Optimization | |
1397 | Perform cloning to make Interprocedural constant propagation stronger | |
1398 | ||
e65bb9be JH |
1399 | fipa-profile |
1400 | Common Report Var(flag_ipa_profile) Init(0) Optimization | |
1401 | Perform interprocedural profile propagation | |
ea900239 | 1402 | |
4cf4d6a3 | 1403 | fipa-pta |
c662432e | 1404 | Common Report Var(flag_ipa_pta) Init(0) Optimization |
4cf4d6a3 DB |
1405 | Perform interprocedural points-to analysis |
1406 | ||
e65bb9be JH |
1407 | fipa-pure-const |
1408 | Common Report Var(flag_ipa_pure_const) Init(0) Optimization | |
1409 | Discover pure and const functions | |
1410 | ||
ea900239 | 1411 | fipa-reference |
c662432e | 1412 | Common Report Var(flag_ipa_reference) Init(0) Optimization |
ea900239 DB |
1413 | Discover readonly and non addressable static variables |
1414 | ||
43d861a5 | 1415 | fipa-matrix-reorg |
04f92ff4 RG |
1416 | Common Ignore |
1417 | Does nothing. Preserved for backward compatibility. | |
43d861a5 | 1418 | |
e1dc98b2 | 1419 | fipa-struct-reorg |
b8beb4d1 RG |
1420 | Common Ignore |
1421 | Does nothing. Preserved for backward compatibility. | |
e1dc98b2 | 1422 | |
058e97ec | 1423 | fira-algorithm= |
e6d4b984 | 1424 | Common Joined RejectNegative Enum(ira_algorithm) Var(flag_ira_algorithm) Init(IRA_ALGORITHM_CB) |
7db7ed3c VM |
1425 | -fira-algorithm=[CB|priority] Set the used IRA algorithm |
1426 | ||
e6d4b984 JM |
1427 | Enum |
1428 | Name(ira_algorithm) Type(enum ira_algorithm) UnknownError(unknown IRA algorithm %qs) | |
1429 | ||
1430 | EnumValue | |
1431 | Enum(ira_algorithm) String(CB) Value(IRA_ALGORITHM_CB) | |
1432 | ||
1433 | EnumValue | |
1434 | Enum(ira_algorithm) String(priority) Value(IRA_ALGORITHM_PRIORITY) | |
1435 | ||
7db7ed3c | 1436 | fira-region= |
ffe8727f | 1437 | Common Joined RejectNegative Enum(ira_region) Var(flag_ira_region) Init(IRA_REGION_AUTODETECT) |
7db7ed3c | 1438 | -fira-region=[one|all|mixed] Set regions for IRA |
058e97ec | 1439 | |
e6d4b984 JM |
1440 | Enum |
1441 | Name(ira_region) Type(enum ira_region) UnknownError(unknown IRA region %qs) | |
1442 | ||
1443 | EnumValue | |
1444 | Enum(ira_region) String(one) Value(IRA_REGION_ONE) | |
1445 | ||
1446 | EnumValue | |
1447 | Enum(ira_region) String(all) Value(IRA_REGION_ALL) | |
1448 | ||
1449 | EnumValue | |
1450 | Enum(ira_region) String(mixed) Value(IRA_REGION_MIXED) | |
1451 | ||
b11f0116 BC |
1452 | fira-hoist-pressure |
1453 | Common Report Var(flag_ira_hoist_pressure) Init(1) Optimization | |
1454 | Use IRA based register pressure calculation | |
1455 | in RTL hoist optimizations. | |
1456 | ||
1833192f | 1457 | fira-loop-pressure |
f3d83ffe | 1458 | Common Report Var(flag_ira_loop_pressure) Optimization |
1833192f VM |
1459 | Use IRA based register pressure calculation |
1460 | in RTL loop optimizations. | |
1461 | ||
058e97ec VM |
1462 | fira-share-save-slots |
1463 | Common Report Var(flag_ira_share_save_slots) Init(1) | |
1464 | Share slots for saving different hard registers. | |
1465 | ||
1466 | fira-share-spill-slots | |
1467 | Common Report Var(flag_ira_share_spill_slots) Init(1) | |
1468 | Share stack slots for spilled pseudo-registers. | |
1469 | ||
1470 | fira-verbose= | |
5498f011 | 1471 | Common RejectNegative Joined UInteger Var(flag_ira_verbose) Init(5) |
f94e1d66 | 1472 | -fira-verbose=<number> Control IRA's level of diagnostic messages. |
058e97ec | 1473 | |
8b11a64c | 1474 | fivopts |
c662432e | 1475 | Common Report Var(flag_ivopts) Init(1) Optimization |
8b11a64c ZD |
1476 | Optimize induction variables on trees |
1477 | ||
82c0180d | 1478 | fjump-tables |
c662432e | 1479 | Common Var(flag_jump_tables) Init(1) Optimization |
82c0180d JM |
1480 | Use jump tables for sufficiently large switch statements |
1481 | ||
de32c0cb | 1482 | fkeep-inline-functions |
50431bc4 | 1483 | Common Report Var(flag_keep_inline_functions) |
f3fdaec4 | 1484 | Generate code for functions even if they are fully inlined |
de32c0cb NB |
1485 | |
1486 | fkeep-static-consts | |
50431bc4 | 1487 | Common Report Var(flag_keep_static_consts) Init(1) |
f3fdaec4 | 1488 | Emit static const variables even if they are not used |
de32c0cb | 1489 | |
6ff3a151 | 1490 | fleading-underscore |
50431bc4 | 1491 | Common Report Var(flag_leading_underscore) Init(-1) |
f3fdaec4 | 1492 | Give external symbols a leading underscore |
6ff3a151 | 1493 | |
efa1cdf0 | 1494 | floop-optimize |
2d2bd949 | 1495 | Common Ignore |
c0220ea4 | 1496 | Does nothing. Preserved for backward compatibility. |
efa1cdf0 | 1497 | |
d7f09764 | 1498 | flto |
014d92e1 | 1499 | Common |
d7f09764 DN |
1500 | Enable link-time optimization. |
1501 | ||
014d92e1 JH |
1502 | flto= |
1503 | Common RejectNegative Joined Var(flag_lto) | |
1504 | Link-time optimization with number of parallel jobs or jobserver. | |
1505 | ||
783dab6b RB |
1506 | Enum |
1507 | Name(lto_partition_model) Type(enum lto_partition_model) UnknownError(unknown LTO partitioning model %qs) | |
852e4bd2 | 1508 | |
783dab6b RB |
1509 | EnumValue |
1510 | Enum(lto_partition_model) String(none) Value(LTO_PARTITION_NONE) | |
852e4bd2 | 1511 | |
783dab6b RB |
1512 | EnumValue |
1513 | Enum(lto_partition_model) String(one) Value(LTO_PARTITION_ONE) | |
1514 | ||
1515 | EnumValue | |
1516 | Enum(lto_partition_model) String(balanced) Value(LTO_PARTITION_BALANCED) | |
1517 | ||
1518 | EnumValue | |
1519 | Enum(lto_partition_model) String(1to1) Value(LTO_PARTITION_1TO1) | |
1520 | ||
1521 | EnumValue | |
1522 | Enum(lto_partition_model) String(max) Value(LTO_PARTITION_MAX) | |
c3c445e1 | 1523 | |
783dab6b RB |
1524 | flto-partition= |
1525 | Common Joined RejectNegative Enum(lto_partition_model) Var(flag_lto_partition) Init(LTO_PARTITION_BALANCED) | |
1526 | Specify the algorithm to partition symbols and vars at linktime | |
014d92e1 | 1527 | |
d7f09764 DN |
1528 | ; The initial value of -1 comes from Z_DEFAULT_COMPRESSION in zlib.h. |
1529 | flto-compression-level= | |
fcfbd84e | 1530 | Common Joined RejectNegative UInteger Var(flag_lto_compression_level) Init(-1) |
f94e1d66 | 1531 | -flto-compression-level=<number> Use zlib compression level <number> for IL |
d7f09764 DN |
1532 | |
1533 | flto-report | |
1d67dde8 | 1534 | Common Report Var(flag_lto_report) Init(0) |
d7f09764 DN |
1535 | Report various link-time optimization statistics |
1536 | ||
057f8f20 AK |
1537 | flto-report-wpa |
1538 | Common Report Var(flag_lto_report_wpa) Init(0) | |
1539 | Report various link-time optimization statistics for WPA only | |
1540 | ||
6ff3a151 | 1541 | fmath-errno |
5e46b0c6 | 1542 | Common Report Var(flag_errno_math) Init(1) Optimization SetByCombined |
f3fdaec4 | 1543 | Set errno after built-in math functions |
6ff3a151 | 1544 | |
3a789837 NF |
1545 | fmax-errors= |
1546 | Common Joined RejectNegative UInteger Var(flag_max_errors) | |
1547 | -fmax-errors=<number> Maximum number of errors to report | |
1548 | ||
6ff3a151 | 1549 | fmem-report |
50431bc4 | 1550 | Common Report Var(mem_report) |
f3fdaec4 | 1551 | Report on permanent memory allocation |
6ff3a151 | 1552 | |
b3e44629 AK |
1553 | fmem-report-wpa |
1554 | Common Report Var(mem_report_wpa) | |
1555 | Report on permanent memory allocation in WPA only | |
1556 | ||
31b66477 KC |
1557 | ; This will attempt to merge constant section constants, if 1 only |
1558 | ; string constants and constants from constant pool, if 2 also constant | |
1559 | ; variables. | |
6ff3a151 | 1560 | fmerge-all-constants |
c662432e | 1561 | Common Report Var(flag_merge_constants,2) Init(1) Optimization |
f3fdaec4 | 1562 | Attempt to merge identical constants and constant variables |
6ff3a151 NB |
1563 | |
1564 | fmerge-constants | |
f0036cca | 1565 | Common Report Var(flag_merge_constants,1) Optimization |
f3fdaec4 | 1566 | Attempt to merge identical constants across compilation units |
6ff3a151 | 1567 | |
28a08168 ILT |
1568 | fmerge-debug-strings |
1569 | Common Report Var(flag_merge_debug_strings) Init(1) | |
1570 | Attempt to merge identical debug strings across compilation units | |
1571 | ||
de32c0cb NB |
1572 | fmessage-length= |
1573 | Common RejectNegative Joined UInteger | |
cf03fd63 | 1574 | -fmessage-length=<number> Limit diagnostics to <number> characters per line. 0 suppresses line-wrapping |
de32c0cb | 1575 | |
e5626198 | 1576 | fmodulo-sched |
c662432e | 1577 | Common Report Var(flag_modulo_sched) Optimization |
e5626198 AZ |
1578 | Perform SMS based modulo scheduling before the first scheduling pass |
1579 | ||
517d76fa VY |
1580 | fmodulo-sched-allow-regmoves |
1581 | Common Report Var(flag_modulo_sched_allow_regmoves) | |
1582 | Perform SMS based modulo scheduling with register moves allowed | |
1583 | ||
5e962776 | 1584 | fmove-loop-invariants |
14379e66 | 1585 | Common Report Var(flag_move_loop_invariants) Optimization |
5e962776 ZD |
1586 | Move loop invariant computations out of loops |
1587 | ||
6fb5fa3c | 1588 | fdce |
6ae4be32 | 1589 | Common Var(flag_dce) Init(1) Optimization |
6fb5fa3c DB |
1590 | Use the RTL dead code elimination pass |
1591 | ||
1592 | fdse | |
6ae4be32 | 1593 | Common Var(flag_dse) Init(1) Optimization |
6fb5fa3c DB |
1594 | Use the RTL dead store elimination pass |
1595 | ||
d72372e4 | 1596 | freschedule-modulo-scheduled-loops |
c662432e | 1597 | Common Report Var(flag_resched_modulo_sched) Optimization |
d72372e4 MH |
1598 | Enable/Disable the traditional scheduling in loops that already passed modulo scheduling |
1599 | ||
6ff3a151 | 1600 | fnon-call-exceptions |
c662432e | 1601 | Common Report Var(flag_non_call_exceptions) Optimization |
f3fdaec4 | 1602 | Support synchronous non-call exceptions |
6ff3a151 | 1603 | |
de32c0cb | 1604 | fomit-frame-pointer |
c662432e | 1605 | Common Report Var(flag_omit_frame_pointer) Optimization |
f3fdaec4 | 1606 | When possible do not generate stack frames |
de32c0cb | 1607 | |
78c60e3d SS |
1608 | fopt-info |
1609 | Common Report Var(flag_opt_info) Optimization | |
1610 | Enable all optimization info dumps on stderr | |
1611 | ||
1612 | fopt-info- | |
1613 | Common Joined RejectNegative Var(common_deferred_options) Defer | |
1614 | -fopt-info[-<type>=filename] Dump compiler optimization details | |
1615 | ||
6ff3a151 | 1616 | foptimize-register-move |
3b6d1699 VM |
1617 | Common Ignore |
1618 | Does nothing. Preserved for backward compatibility. | |
6ff3a151 | 1619 | |
de32c0cb | 1620 | foptimize-sibling-calls |
c662432e | 1621 | Common Report Var(flag_optimize_sibling_calls) Optimization |
f3fdaec4 | 1622 | Optimize sibling and tail recursive calls |
de32c0cb | 1623 | |
3e485f62 JH |
1624 | fpartial-inlining |
1625 | Common Report Var(flag_partial_inlining) | |
1626 | Perform partial inlining | |
1627 | ||
a5573239 JH |
1628 | fpre-ipa-mem-report |
1629 | Common Report Var(pre_ipa_mem_report) | |
1630 | Report on memory allocation before interprocedural optimization | |
1631 | ||
1632 | fpost-ipa-mem-report | |
1633 | Common Report Var(post_ipa_mem_report) | |
1634 | Report on memory allocation before interprocedural optimization | |
1635 | ||
6ff3a151 | 1636 | fpack-struct |
c662432e | 1637 | Common Report Var(flag_pack_struct) Optimization |
f3fdaec4 | 1638 | Pack structure members together without holes |
6ff3a151 | 1639 | |
467cecf3 | 1640 | fpack-struct= |
c662432e | 1641 | Common RejectNegative Joined UInteger Optimization |
467cecf3 JB |
1642 | -fpack-struct=<number> Set initial maximum structure member alignment |
1643 | ||
de32c0cb | 1644 | fpcc-struct-return |
5498f011 | 1645 | Common Report Var(flag_pcc_struct_return,1) Init(DEFAULT_PCC_STRUCT_RETURN) |
f3fdaec4 | 1646 | Return small aggregates in memory, not registers |
de32c0cb NB |
1647 | |
1648 | fpeel-loops | |
c662432e | 1649 | Common Report Var(flag_peel_loops) Optimization |
f3fdaec4 | 1650 | Perform loop peeling |
de32c0cb NB |
1651 | |
1652 | fpeephole | |
c662432e | 1653 | Common Report Var(flag_no_peephole,0) Optimization |
f3fdaec4 | 1654 | Enable machine specific peephole optimizations |
de32c0cb | 1655 | |
6ff3a151 | 1656 | fpeephole2 |
c662432e | 1657 | Common Report Var(flag_peephole2) Optimization |
f3fdaec4 | 1658 | Enable an RTL peephole pass before sched2 |
6ff3a151 | 1659 | |
31b66477 | 1660 | fPIC |
da0aa2cc | 1661 | Common Report Var(flag_pic,2) Negative(fPIE) |
31b66477 KC |
1662 | Generate position-independent code if possible (large mode) |
1663 | ||
1664 | fPIE | |
da0aa2cc | 1665 | Common Report Var(flag_pie,2) Negative(fpic) |
31b66477 KC |
1666 | Generate position-independent code for executables if possible (large mode) |
1667 | ||
6ff3a151 | 1668 | fpic |
da0aa2cc | 1669 | Common Report Var(flag_pic,1) Negative(fpie) |
31b66477 | 1670 | Generate position-independent code if possible (small mode) |
6ff3a151 NB |
1671 | |
1672 | fpie | |
da0aa2cc | 1673 | Common Report Var(flag_pie,1) Negative(fPIC) |
31b66477 | 1674 | Generate position-independent code for executables if possible (small mode) |
6ff3a151 | 1675 | |
68a607d8 | 1676 | fplugin= |
21bf1558 | 1677 | Common Joined RejectNegative Var(common_deferred_options) Defer |
68a607d8 DN |
1678 | Specify a plugin to load |
1679 | ||
1680 | fplugin-arg- | |
21bf1558 | 1681 | Common Joined RejectNegative Var(common_deferred_options) Defer |
f94e1d66 | 1682 | -fplugin-arg-<name>-<key>[=<value>] Specify argument <key>=<value> for plugin <name> |
68a607d8 | 1683 | |
bbc8a8dc | 1684 | fpredictive-commoning |
6ae4be32 | 1685 | Common Report Var(flag_predictive_commoning) Optimization |
bbc8a8dc ZD |
1686 | Run predictive commoning optimization. |
1687 | ||
de32c0cb | 1688 | fprefetch-loop-arrays |
1fbb509a | 1689 | Common Report Var(flag_prefetch_loop_arrays) Init(-1) Optimization |
f3fdaec4 | 1690 | Generate prefetch instructions, if available, for arrays in loops |
de32c0cb | 1691 | |
6ff3a151 | 1692 | fprofile |
50431bc4 | 1693 | Common Report Var(profile_flag) |
f3fdaec4 | 1694 | Enable basic program profiling code |
6ff3a151 NB |
1695 | |
1696 | fprofile-arcs | |
50431bc4 | 1697 | Common Report Var(profile_arc_flag) |
f3fdaec4 | 1698 | Insert arc-based program profiling code |
6ff3a151 | 1699 | |
2f908293 | 1700 | fprofile-dir= |
0576d21f | 1701 | Common Joined RejectNegative Var(profile_data_prefix) |
2f908293 SP |
1702 | Set the top-level directory for storing the profile data. |
1703 | The default is 'pwd'. | |
1704 | ||
52c76998 PY |
1705 | fprofile-correction |
1706 | Common Report Var(flag_profile_correction) | |
1707 | Enable correction of flow inconsistent profile data input | |
1708 | ||
a8a5f53a JH |
1709 | fprofile-generate |
1710 | Common | |
1711 | Enable common options for generating profile info for profile feedback directed optimizations | |
1712 | ||
2f908293 SP |
1713 | fprofile-generate= |
1714 | Common Joined RejectNegative | |
1715 | Enable common options for generating profile info for profile feedback directed optimizations, and set -fprofile-dir= | |
1716 | ||
a8a5f53a | 1717 | fprofile-use |
2f908293 | 1718 | Common Var(flag_profile_use) |
a8a5f53a JH |
1719 | Enable common options for performing profile feedback directed optimizations |
1720 | ||
2f908293 SP |
1721 | fprofile-use= |
1722 | Common Joined RejectNegative | |
1723 | Enable common options for performing profile feedback directed optimizations, and set -fprofile-dir= | |
1724 | ||
fca9dc00 | 1725 | fprofile-values |
50431bc4 | 1726 | Common Report Var(flag_profile_values) |
fca9dc00 ZD |
1727 | Insert code to profile values of expressions |
1728 | ||
37e5402b JH |
1729 | fprofile-report |
1730 | Common Report Var(profile_report) | |
1731 | Report on consistency of profile | |
1732 | ||
9cec31f4 ML |
1733 | fprofile-reorder-functions |
1734 | Common Report Var(flag_profile_reorder_functions) | |
1735 | Enable function reordering that improves code placement | |
1736 | ||
de32c0cb | 1737 | frandom-seed |
299404a1 | 1738 | Common Var(common_deferred_options) Defer |
de32c0cb NB |
1739 | |
1740 | frandom-seed= | |
299404a1 | 1741 | Common Joined RejectNegative Var(common_deferred_options) Defer |
cf03fd63 | 1742 | -frandom-seed=<string> Make compile reproducible using <string> |
de32c0cb | 1743 | |
e0d9d0dd NC |
1744 | ; This switch causes the command line that was used to create an |
1745 | ; object file to be recorded into the object file. The exact format | |
1746 | ; of this recording is target and binary file format dependent. | |
1747 | ; It is related to the -fverbose-asm switch, but that switch only | |
1748 | ; records information in the assembler output file as comments, so | |
1749 | ; they never reach the object file. | |
1750 | frecord-gcc-switches | |
1751 | Common Report Var(flag_record_gcc_switches) | |
1752 | Record gcc command line switches in the object file. | |
1753 | ||
de32c0cb | 1754 | freg-struct-return |
f0036cca | 1755 | Common Report Var(flag_pcc_struct_return,0) Optimization |
f3fdaec4 | 1756 | Return small aggregates in registers |
de32c0cb | 1757 | |
6ff3a151 | 1758 | fregmove |
3b6d1699 VM |
1759 | Common Ignore |
1760 | Does nothing. Preserved for backward compatibility. | |
6ff3a151 | 1761 | |
f20f2613 VM |
1762 | flive-range-shrinkage |
1763 | Common Report Var(flag_live_range_shrinkage) Init(0) Optimization | |
1764 | Relief of register pressure through live range shrinkage | |
1765 | ||
6ff3a151 | 1766 | frename-registers |
c662432e | 1767 | Common Report Var(flag_rename_registers) Init(2) Optimization |
f3fdaec4 | 1768 | Perform a register renaming optimization pass |
6ff3a151 NB |
1769 | |
1770 | freorder-blocks | |
c662432e | 1771 | Common Report Var(flag_reorder_blocks) Optimization |
f3fdaec4 | 1772 | Reorder basic blocks to improve code placement |
6ff3a151 | 1773 | |
750054a2 | 1774 | freorder-blocks-and-partition |
c662432e | 1775 | Common Report Var(flag_reorder_blocks_and_partition) Optimization |
750054a2 CT |
1776 | Reorder basic blocks and partition into hot and cold sections |
1777 | ||
6ff3a151 | 1778 | freorder-functions |
c662432e | 1779 | Common Report Var(flag_reorder_functions) Optimization |
f3fdaec4 | 1780 | Reorder functions to improve code placement |
6ff3a151 | 1781 | |
de32c0cb | 1782 | frerun-cse-after-loop |
3020190e | 1783 | Common Report Var(flag_rerun_cse_after_loop) Optimization |
f3fdaec4 | 1784 | Add a common subexpression elimination pass after loop optimizations |
de32c0cb | 1785 | |
efa1cdf0 | 1786 | frerun-loop-opt |
2d2bd949 | 1787 | Common Ignore |
c0220ea4 | 1788 | Does nothing. Preserved for backward compatibility. |
efa1cdf0 | 1789 | |
039c3d42 | 1790 | frounding-math |
5e46b0c6 | 1791 | Common Report Var(flag_rounding_math) Optimization SetByCombined |
039c3d42 RS |
1792 | Disable optimizations that assume default FP rounding behavior |
1793 | ||
6ff3a151 | 1794 | fsched-interblock |
c662432e | 1795 | Common Report Var(flag_schedule_interblock) Init(1) Optimization |
f3fdaec4 | 1796 | Enable scheduling across basic blocks |
6ff3a151 | 1797 | |
ce18efcb VM |
1798 | fsched-pressure |
1799 | Common Report Var(flag_sched_pressure) Init(0) Optimization | |
1800 | Enable register pressure sensitive insn scheduling | |
1801 | ||
6ff3a151 | 1802 | fsched-spec |
c662432e | 1803 | Common Report Var(flag_schedule_speculative) Init(1) Optimization |
f3fdaec4 | 1804 | Allow speculative motion of non-loads |
6ff3a151 NB |
1805 | |
1806 | fsched-spec-load | |
c662432e | 1807 | Common Report Var(flag_schedule_speculative_load) Optimization |
f3fdaec4 | 1808 | Allow speculative motion of some loads |
6ff3a151 NB |
1809 | |
1810 | fsched-spec-load-dangerous | |
c662432e | 1811 | Common Report Var(flag_schedule_speculative_load_dangerous) Optimization |
f3fdaec4 | 1812 | Allow speculative motion of more loads |
6ff3a151 | 1813 | |
de32c0cb | 1814 | fsched-verbose= |
299404a1 | 1815 | Common RejectNegative Joined UInteger Var(sched_verbose_param) |
cf03fd63 | 1816 | -fsched-verbose=<number> Set the verbosity level of the scheduler |
de32c0cb | 1817 | |
6ff3a151 | 1818 | fsched2-use-superblocks |
c662432e | 1819 | Common Report Var(flag_sched2_use_superblocks) Optimization |
f3fdaec4 | 1820 | If scheduling post reload, do superblock scheduling |
6ff3a151 NB |
1821 | |
1822 | fsched2-use-traces | |
2d2bd949 | 1823 | Common Ignore |
57257f0d | 1824 | Does nothing. Preserved for backward compatibility. |
6ff3a151 | 1825 | |
de32c0cb | 1826 | fschedule-insns |
c662432e | 1827 | Common Report Var(flag_schedule_insns) Optimization |
f3fdaec4 | 1828 | Reschedule instructions before register allocation |
de32c0cb NB |
1829 | |
1830 | fschedule-insns2 | |
c662432e | 1831 | Common Report Var(flag_schedule_insns_after_reload) Optimization |
f3fdaec4 | 1832 | Reschedule instructions after register allocation |
de32c0cb | 1833 | |
e855c69d AB |
1834 | ; This flag should be on when a target implements non-trivial |
1835 | ; scheduling hooks, maybe saving some information for its own sake. | |
1836 | ; On IA64, for example, this is used for correct bundling. | |
1837 | fselective-scheduling | |
1838 | Common Report Var(flag_selective_scheduling) Optimization | |
1839 | Schedule instructions using selective scheduling algorithm | |
1840 | ||
1841 | fselective-scheduling2 | |
1842 | Common Report Var(flag_selective_scheduling2) Optimization | |
1843 | Run selective scheduling after reload | |
1844 | ||
1845 | fsel-sched-pipelining | |
1846 | Common Report Var(flag_sel_sched_pipelining) Init(0) Optimization | |
1847 | Perform software pipelining of inner loops during selective scheduling | |
1848 | ||
1849 | fsel-sched-pipelining-outer-loops | |
1850 | Common Report Var(flag_sel_sched_pipelining_outer_loops) Init(0) Optimization | |
1851 | Perform software pipelining of outer loops during selective scheduling | |
1852 | ||
1853 | fsel-sched-reschedule-pipelined | |
1854 | Common Report Var(flag_sel_sched_reschedule_pipelined) Init(0) Optimization | |
1855 | Reschedule pipelined regions without pipelining | |
1856 | ||
31b66477 KC |
1857 | ; sched_stalled_insns means that insns can be moved prematurely from the queue |
1858 | ; of stalled insns into the ready list. | |
569fa502 | 1859 | fsched-stalled-insns |
ab442df7 | 1860 | Common Report Var(flag_sched_stalled_insns) Optimization UInteger |
569fa502 DN |
1861 | Allow premature scheduling of queued insns |
1862 | ||
1863 | fsched-stalled-insns= | |
c22cacf3 | 1864 | Common RejectNegative Joined UInteger |
4e994432 | 1865 | -fsched-stalled-insns=<number> Set number of queued insns that can be prematurely scheduled |
569fa502 | 1866 | |
31b66477 KC |
1867 | ; sched_stalled_insns_dep controls how many recently scheduled cycles will |
1868 | ; be examined for a dependency on a stalled insn that is candidate for | |
1869 | ; premature removal from the queue of stalled insns into the ready list (has | |
1870 | ; an effect only if the flag 'sched_stalled_insns' is set). | |
569fa502 | 1871 | fsched-stalled-insns-dep |
ab442df7 | 1872 | Common Report Var(flag_sched_stalled_insns_dep,1) Init(1) Optimization UInteger |
569fa502 DN |
1873 | Set dependence distance checking in premature scheduling of queued insns |
1874 | ||
1875 | fsched-stalled-insns-dep= | |
1876 | Common RejectNegative Joined UInteger | |
4e994432 | 1877 | -fsched-stalled-insns-dep=<number> Set dependence distance checking in premature scheduling of queued insns |
569fa502 | 1878 | |
ee4764a8 GS |
1879 | fsched-group-heuristic |
1880 | Common Report Var(flag_sched_group_heuristic) Init(1) Optimization | |
1881 | Enable the group heuristic in the scheduler | |
1882 | ||
1883 | fsched-critical-path-heuristic | |
1884 | Common Report Var(flag_sched_critical_path_heuristic) Init(1) Optimization | |
1885 | Enable the critical path heuristic in the scheduler | |
1886 | ||
1887 | fsched-spec-insn-heuristic | |
1888 | Common Report Var(flag_sched_spec_insn_heuristic) Init(1) Optimization | |
1889 | Enable the speculative instruction heuristic in the scheduler | |
1890 | ||
ee4764a8 GS |
1891 | fsched-rank-heuristic |
1892 | Common Report Var(flag_sched_rank_heuristic) Init(1) Optimization | |
1893 | Enable the rank heuristic in the scheduler | |
1894 | ||
1895 | fsched-last-insn-heuristic | |
1896 | Common Report Var(flag_sched_last_insn_heuristic) Init(1) Optimization | |
1897 | Enable the last instruction heuristic in the scheduler | |
1898 | ||
1899 | fsched-dep-count-heuristic | |
1900 | Common Report Var(flag_sched_dep_count_heuristic) Init(1) Optimization | |
1901 | Enable the dependent count heuristic in the scheduler | |
1902 | ||
aacd3885 | 1903 | fsection-anchors |
c662432e | 1904 | Common Report Var(flag_section_anchors) Optimization |
aacd3885 RS |
1905 | Access data in the same section from shared anchor points |
1906 | ||
8cd37d0b | 1907 | fsee |
2d2bd949 | 1908 | Common Ignore |
8393a9c8 | 1909 | Does nothing. Preserved for backward compatibility. |
8cd37d0b | 1910 | |
87a0ebfd | 1911 | fzee |
26cd9add EI |
1912 | Common Ignore |
1913 | Does nothing. Preserved for backward compatibility. | |
1914 | ||
1915 | free | |
1916 | Common Report Var(flag_ree) Init(0) | |
1917 | Turn on Redundant Extensions Elimination pass. | |
87a0ebfd | 1918 | |
8abb6b22 | 1919 | fshow-column |
1cb42611 | 1920 | Common Report Var(flag_show_column) Init(1) |
e74fe492 | 1921 | Show column numbers in diagnostics, when available. Default on |
8abb6b22 | 1922 | |
484db665 BS |
1923 | fshrink-wrap |
1924 | Common Report Var(flag_shrink_wrap) Optimization | |
1925 | Emit function prologues only before parts of the function that need it, | |
1926 | rather than at the top of the function. | |
1927 | ||
6ff3a151 | 1928 | fsignaling-nans |
5e46b0c6 | 1929 | Common Report Var(flag_signaling_nans) Optimization SetByCombined |
f3fdaec4 | 1930 | Disable optimizations observable by IEEE signaling NaNs |
6ff3a151 | 1931 | |
db02da79 | 1932 | fsigned-zeros |
5e46b0c6 | 1933 | Common Report Var(flag_signed_zeros) Init(1) Optimization SetByCombined |
db02da79 RS |
1934 | Disable floating point optimizations that ignore the IEEE signedness of zero |
1935 | ||
6ff3a151 | 1936 | fsingle-precision-constant |
c662432e | 1937 | Common Report Var(flag_single_precision_constant) Optimization |
f3fdaec4 | 1938 | Convert floating point constants to single precision constants |
6ff3a151 | 1939 | |
113d659a | 1940 | fsplit-ivs-in-unroller |
c662432e | 1941 | Common Report Var(flag_split_ivs_in_unroller) Init(1) Optimization |
c85ce869 | 1942 | Split lifetimes of induction variables when loops are unrolled |
113d659a | 1943 | |
7458026b ILT |
1944 | fsplit-stack |
1945 | Common Report Var(flag_split_stack) Init(-1) | |
1946 | Generate discontiguous stack frames | |
1947 | ||
e53a16e7 | 1948 | fsplit-wide-types |
21af5cdf | 1949 | Common Report Var(flag_split_wide_types) Optimization |
e53a16e7 ILT |
1950 | Split wide types into independent registers |
1951 | ||
f37a4f14 | 1952 | fvariable-expansion-in-unroller |
c662432e | 1953 | Common Report Var(flag_variable_expansion_in_unroller) Optimization |
c85ce869 | 1954 | Apply variable expansion when loops are unrolled |
f37a4f14 | 1955 | |
b38f3813 EB |
1956 | fstack-check= |
1957 | Common Report RejectNegative Joined | |
1958 | -fstack-check=[no|generic|specific] Insert stack checking code into the program | |
1959 | ||
6ff3a151 | 1960 | fstack-check |
5de8299c | 1961 | Common Alias(fstack-check=, specific, no) |
b38f3813 | 1962 | Insert stack checking code into the program. Same as -fstack-check=specific |
6ff3a151 | 1963 | |
de32c0cb | 1964 | fstack-limit |
21bf1558 | 1965 | Common Var(common_deferred_options) Defer |
de32c0cb | 1966 | |
058de654 | 1967 | fstack-limit-register= |
21bf1558 | 1968 | Common RejectNegative Joined Var(common_deferred_options) Defer |
cf03fd63 | 1969 | -fstack-limit-register=<register> Trap if the stack goes past <register> |
058de654 NB |
1970 | |
1971 | fstack-limit-symbol= | |
21bf1558 | 1972 | Common RejectNegative Joined Var(common_deferred_options) Defer |
cf03fd63 | 1973 | -fstack-limit-symbol=<name> Trap if the stack goes past symbol <name> |
058de654 | 1974 | |
7d69de61 RH |
1975 | fstack-protector |
1976 | Common Report Var(flag_stack_protect, 1) | |
1977 | Use propolice as a stack protection method | |
1978 | ||
1979 | fstack-protector-all | |
f0036cca | 1980 | Common Report RejectNegative Var(flag_stack_protect, 2) |
7d69de61 RH |
1981 | Use a stack protection method for every function |
1982 | ||
f6bc1c4a HS |
1983 | fstack-protector-strong |
1984 | Common Report RejectNegative Var(flag_stack_protect, 3) | |
1985 | Use a smart stack protection method for certain functions | |
1986 | ||
d3c12306 EB |
1987 | fstack-usage |
1988 | Common RejectNegative Var(flag_stack_usage) | |
1989 | Output stack usage information on a per-function basis | |
1990 | ||
de32c0cb | 1991 | fstrength-reduce |
2d2bd949 | 1992 | Common Ignore |
c0220ea4 | 1993 | Does nothing. Preserved for backward compatibility. |
de32c0cb | 1994 | |
31b66477 KC |
1995 | ; Nonzero if we should do (language-dependent) alias analysis. |
1996 | ; Typically, this analysis will assume that expressions of certain | |
1997 | ; types do not alias expressions of certain other types. Only used | |
1998 | ; if alias analysis (in general) is enabled. | |
6ff3a151 | 1999 | fstrict-aliasing |
c662432e | 2000 | Common Report Var(flag_strict_aliasing) Optimization |
f3fdaec4 | 2001 | Assume strict aliasing rules apply |
6ff3a151 | 2002 | |
eeef0e45 ILT |
2003 | fstrict-overflow |
2004 | Common Report Var(flag_strict_overflow) | |
2005 | Treat signed overflow as undefined | |
2006 | ||
e8053cf5 RH |
2007 | fsync-libcalls |
2008 | Common Report Var(flag_sync_libcalls) Init(1) | |
2009 | Implement __atomic operations via libcalls to legacy __sync functions | |
2010 | ||
de32c0cb | 2011 | fsyntax-only |
50431bc4 | 2012 | Common Report Var(flag_syntax_only) |
f3fdaec4 | 2013 | Check for syntax errors, then stop |
de32c0cb | 2014 | |
6ff3a151 | 2015 | ftest-coverage |
50431bc4 | 2016 | Common Report Var(flag_test_coverage) |
f3fdaec4 | 2017 | Create data files needed by \"gcov\" |
6ff3a151 | 2018 | |
de32c0cb | 2019 | fthread-jumps |
c662432e | 2020 | Common Report Var(flag_thread_jumps) Optimization |
f3fdaec4 | 2021 | Perform jump threading optimizations |
de32c0cb | 2022 | |
6ff3a151 | 2023 | ftime-report |
50431bc4 | 2024 | Common Report Var(time_report) |
f3fdaec4 | 2025 | Report the time taken by each compiler pass |
6ff3a151 | 2026 | |
058de654 | 2027 | ftls-model= |
e6d4b984 | 2028 | Common Joined RejectNegative Enum(tls_model) Var(flag_tls_default) Init(TLS_MODEL_GLOBAL_DYNAMIC) |
cf03fd63 | 2029 | -ftls-model=[global-dynamic|local-dynamic|initial-exec|local-exec] Set the default thread-local storage code generation model |
058de654 | 2030 | |
e6d4b984 JM |
2031 | Enum |
2032 | Name(tls_model) Type(enum tls_model) UnknownError(unknown TLS model %qs) | |
2033 | ||
2034 | EnumValue | |
2035 | Enum(tls_model) String(global-dynamic) Value(TLS_MODEL_GLOBAL_DYNAMIC) | |
2036 | ||
2037 | EnumValue | |
2038 | Enum(tls_model) String(local-dynamic) Value(TLS_MODEL_LOCAL_DYNAMIC) | |
2039 | ||
2040 | EnumValue | |
2041 | Enum(tls_model) String(initial-exec) Value(TLS_MODEL_INITIAL_EXEC) | |
2042 | ||
2043 | EnumValue | |
2044 | Enum(tls_model) String(local-exec) Value(TLS_MODEL_LOCAL_EXEC) | |
2045 | ||
474eccc6 | 2046 | ftoplevel-reorder |
d6cc6ec9 | 2047 | Common Report Var(flag_toplevel_reorder) Init(2) Optimization |
474eccc6 ILT |
2048 | Reorder top level functions, variables, and asms |
2049 | ||
de32c0cb | 2050 | ftracer |
50431bc4 | 2051 | Common Report Var(flag_tracer) |
f3fdaec4 | 2052 | Perform superblock formation via tail duplication |
de32c0cb | 2053 | |
31b66477 KC |
2054 | ; Zero means that floating-point math operations cannot generate a |
2055 | ; (user-visible) trap. This is the case, for example, in nonstop | |
2056 | ; IEEE 754 arithmetic. | |
6ff3a151 | 2057 | ftrapping-math |
5e46b0c6 | 2058 | Common Report Var(flag_trapping_math) Init(1) Optimization SetByCombined |
f3fdaec4 | 2059 | Assume floating-point operations can trap |
6ff3a151 NB |
2060 | |
2061 | ftrapv | |
c662432e | 2062 | Common Report Var(flag_trapv) Optimization |
f3fdaec4 | 2063 | Trap for signed overflow in addition, subtraction and multiplication |
6ff3a151 | 2064 | |
6de9cd9a | 2065 | ftree-ccp |
c662432e | 2066 | Common Report Var(flag_tree_ccp) Optimization |
6de9cd9a DN |
2067 | Enable SSA-CCP optimization on trees |
2068 | ||
0b4b14ac RG |
2069 | ftree-bit-ccp |
2070 | Common Report Var(flag_tree_bit_ccp) Optimization | |
2071 | Enable SSA-BIT-CCP optimization on trees | |
2072 | ||
0bca51f0 | 2073 | ftree-store-ccp |
2d2bd949 | 2074 | Common Ignore |
dce2b2f6 | 2075 | Does nothing. Preserved for backward compatibility. |
0bca51f0 | 2076 | |
6de9cd9a | 2077 | ftree-ch |
c662432e | 2078 | Common Report Var(flag_tree_ch) Optimization |
6de9cd9a DN |
2079 | Enable loop header copying on trees |
2080 | ||
21d01365 AO |
2081 | ftree-coalesce-inlined-vars |
2082 | Common Report Var(flag_ssa_coalesce_vars,1) Init(2) RejectNegative Optimization | |
2083 | Enable coalescing of copy-related user variables that are inlined | |
2084 | ||
2085 | ftree-coalesce-vars | |
2086 | Common Report Var(flag_ssa_coalesce_vars,2) Optimization | |
2087 | Enable coalescing of all copy-related user variables | |
2088 | ||
6de9cd9a | 2089 | ftree-copyrename |
c662432e | 2090 | Common Report Var(flag_tree_copyrename) Optimization |
c85ce869 | 2091 | Replace SSA temporaries with better names in copies |
6de9cd9a | 2092 | |
0bca51f0 | 2093 | ftree-copy-prop |
c662432e | 2094 | Common Report Var(flag_tree_copy_prop) Optimization |
0bca51f0 DN |
2095 | Enable copy propagation on trees |
2096 | ||
2097 | ftree-store-copy-prop | |
2d2bd949 | 2098 | Common Ignore |
e9033855 | 2099 | Does nothing. Preserved for backward compatibility. |
0bca51f0 | 2100 | |
a5828d1e MM |
2101 | ftree-cselim |
2102 | Common Report Var(flag_tree_cselim) Init(2) Optimization | |
2103 | Transform condition stores into unconditional ones | |
2104 | ||
b6e99746 MJ |
2105 | ftree-switch-conversion |
2106 | Common Report Var(flag_tree_switch_conversion) Optimization | |
2107 | Perform conversions of switch initializations. | |
2108 | ||
6de9cd9a | 2109 | ftree-dce |
c662432e | 2110 | Common Report Var(flag_tree_dce) Optimization |
6de9cd9a DN |
2111 | Enable SSA dead code elimination optimization on trees |
2112 | ||
2113 | ftree-dominator-opts | |
c662432e | 2114 | Common Report Var(flag_tree_dom) Optimization |
6de9cd9a DN |
2115 | Enable dominator optimizations |
2116 | ||
c9e93168 TV |
2117 | ftree-tail-merge |
2118 | Common Report Var(flag_tree_tail_merge) Optimization | |
2119 | Enable tail merging on trees | |
2120 | ||
6de9cd9a | 2121 | ftree-dse |
c662432e | 2122 | Common Report Var(flag_tree_dse) Optimization |
6de9cd9a DN |
2123 | Enable dead store elimination |
2124 | ||
248fc9f3 RG |
2125 | ftree-forwprop |
2126 | Common Report Var(flag_tree_forwprop) Init(1) Optimization | |
2127 | Enable forward propagation on trees | |
2128 | ||
ff2ad0f7 | 2129 | ftree-fre |
c662432e | 2130 | Common Report Var(flag_tree_fre) Optimization |
ff2ad0f7 DN |
2131 | Enable Full Redundancy Elimination (FRE) on trees |
2132 | ||
8b57bfeb JJ |
2133 | foptimize-strlen |
2134 | Common Report Var(flag_optimize_strlen) Optimization | |
2135 | Enable string length optimizations on trees | |
2136 | ||
ae93744d JL |
2137 | fisolate-erroneous-paths-dereference |
2138 | Common Report Var(flag_isolate_erroneous_paths_dereference) Optimization | |
2139 | Detect paths which trigger erroneous or undefined behaviour due to | |
2140 | dereferencing a NULL pointer. Isolate those paths from the main control | |
2141 | flow and turn the statement with erroneous or undefined behaviour into a trap. | |
2142 | ||
2143 | fisolate-erroneous-paths-attribute | |
2144 | Common Report Var(flag_isolate_erroneous_paths_attribute) Optimization | |
2145 | Detect paths which trigger erroneous or undefined behaviour due a NULL value | |
2146 | being used in a way which is forbidden by a returns_nonnull or nonnull | |
2147 | attribute. Isolate those paths from the main control flow and turn the | |
2148 | statement with erroneous or undefined behaviour into a trap. | |
8fdc414d | 2149 | |
dea61d92 | 2150 | ftree-loop-distribution |
53ed2f0e | 2151 | Common Report Var(flag_tree_loop_distribution) Optimization |
dea61d92 SP |
2152 | Enable loop distribution on trees |
2153 | ||
20769d5e SP |
2154 | ftree-loop-distribute-patterns |
2155 | Common Report Var(flag_tree_loop_distribute_patterns) Optimization | |
2156 | Enable loop distribution for patterns transformed into a library call | |
2157 | ||
1b08d87d | 2158 | ftree-loop-im |
c662432e | 2159 | Common Report Var(flag_tree_loop_im) Init(1) Optimization |
a7e5372d ZD |
2160 | Enable loop invariant motion on trees |
2161 | ||
599eabdb | 2162 | ftree-loop-linear |
7633415c SP |
2163 | Common Alias(floop-interchange) |
2164 | Enable loop interchange transforms. Same as -floop-interchange | |
599eabdb | 2165 | |
1b08d87d | 2166 | ftree-loop-ivcanon |
c662432e | 2167 | Common Report Var(flag_tree_loop_ivcanon) Init(1) Optimization |
1b08d87d DB |
2168 | Create canonical induction variables in loops |
2169 | ||
c66b6c66 | 2170 | ftree-loop-optimize |
c662432e | 2171 | Common Report Var(flag_tree_loop_optimize) Init(1) Optimization |
c66b6c66 ZD |
2172 | Enable loop optimizations on tree level |
2173 | ||
5f40b3cb | 2174 | ftree-parallelize-loops= |
fcfbd84e | 2175 | Common Report Joined RejectNegative UInteger Var(flag_tree_parallelize_loops) Init(1) |
5f40b3cb ZD |
2176 | Enable automatic parallelization of loops |
2177 | ||
248fc9f3 RG |
2178 | ftree-phiprop |
2179 | Common Report Var(flag_tree_phiprop) Init(1) Optimization | |
2180 | Enable hoisting loads from conditional pointers. | |
2181 | ||
6de9cd9a | 2182 | ftree-pre |
c662432e | 2183 | Common Report Var(flag_tree_pre) Optimization |
6de9cd9a DN |
2184 | Enable SSA-PRE optimization on trees |
2185 | ||
fa06ad0d JR |
2186 | ftree-partial-pre |
2187 | Common Report Var(flag_tree_partial_pre) Optimization | |
2188 | In SSA-PRE optimization on trees, enable partial-partial redundancy elimination | |
2189 | ||
248fc9f3 | 2190 | ftree-pta |
14379e66 | 2191 | Common Report Var(flag_tree_pta) Optimization |
248fc9f3 RG |
2192 | Perform function-local points-to analysis on trees. |
2193 | ||
13c59415 UB |
2194 | ftree-reassoc |
2195 | Common Report Var(flag_tree_reassoc) Init(1) Optimization | |
2196 | Enable reassociation on tree level | |
2197 | ||
c75ab022 | 2198 | ftree-salias |
2d2bd949 | 2199 | Common Ignore |
1353232d | 2200 | Does nothing. Preserved for backward compatibility. |
c75ab022 | 2201 | |
fa555252 | 2202 | ftree-sink |
c662432e | 2203 | Common Report Var(flag_tree_sink) Optimization |
fa555252 DB |
2204 | Enable SSA code sinking on trees |
2205 | ||
75cfe445 BS |
2206 | ftree-slsr |
2207 | Common Report Var(flag_tree_slsr) Optimization | |
2208 | Perform straight-line strength reduction | |
2209 | ||
6de9cd9a | 2210 | ftree-sra |
c662432e | 2211 | Common Report Var(flag_tree_sra) Optimization |
6de9cd9a DN |
2212 | Perform scalar replacement of aggregates |
2213 | ||
2214 | ftree-ter | |
3020190e | 2215 | Common Report Var(flag_tree_ter) Optimization |
6de9cd9a DN |
2216 | Replace temporary expressions in the SSA->normal pass |
2217 | ||
c662432e NC |
2218 | ftree-lrs |
2219 | Common Report Var(flag_tree_live_range_split) Optimization | |
2220 | Perform live range splitting during the SSA->normal pass | |
2221 | ||
0bca51f0 | 2222 | ftree-vrp |
c662432e | 2223 | Common Report Var(flag_tree_vrp) Init(0) Optimization |
0bca51f0 DN |
2224 | Perform Value Range Propagation on trees |
2225 | ||
de32c0cb | 2226 | funit-at-a-time |
d6cc6ec9 | 2227 | Common Report Var(flag_unit_at_a_time) Init(1) Optimization |
f3fdaec4 | 2228 | Compile whole compilation unit at a time |
de32c0cb NB |
2229 | |
2230 | funroll-loops | |
c662432e | 2231 | Common Report Var(flag_unroll_loops) Optimization |
f3fdaec4 | 2232 | Perform loop unrolling when iteration count is known |
de32c0cb NB |
2233 | |
2234 | funroll-all-loops | |
c662432e | 2235 | Common Report Var(flag_unroll_all_loops) Optimization |
f3fdaec4 | 2236 | Perform loop unrolling for all loops |
de32c0cb | 2237 | |
f9cc1a70 PB |
2238 | ; Nonzero means that loop optimizer may assume that the induction variables |
2239 | ; that control loops do not overflow and that the loops with nontrivial | |
2240 | ; exit condition are not infinite | |
2241 | funsafe-loop-optimizations | |
c662432e | 2242 | Common Report Var(flag_unsafe_loop_optimizations) Optimization |
f9cc1a70 PB |
2243 | Allow loop optimizations to assume that the loops behave in normal way |
2244 | ||
a1a82611 | 2245 | fassociative-math |
5e46b0c6 | 2246 | Common Report Var(flag_associative_math) SetByCombined |
a1a82611 RE |
2247 | Allow optimization for floating-point arithmetic which may change the |
2248 | result of the operation due to rounding. | |
2249 | ||
2250 | freciprocal-math | |
5e46b0c6 | 2251 | Common Report Var(flag_reciprocal_math) SetByCombined |
a1a82611 RE |
2252 | Same as -fassociative-math for expressions which include division. |
2253 | ||
31b66477 KC |
2254 | ; Nonzero means that unsafe floating-point math optimizations are allowed |
2255 | ; for the sake of speed. IEEE compliance is not guaranteed, and operations | |
2256 | ; are allowed to assume that their arguments and results are "normal" | |
2257 | ; (e.g., nonnegative for SQRT). | |
6ff3a151 | 2258 | funsafe-math-optimizations |
5e46b0c6 | 2259 | Common Report Var(flag_unsafe_math_optimizations) Optimization SetByCombined |
f3fdaec4 | 2260 | Allow math optimizations that may violate IEEE or ISO standards |
6ff3a151 | 2261 | |
de32c0cb | 2262 | funswitch-loops |
c662432e | 2263 | Common Report Var(flag_unswitch_loops) Optimization |
f3fdaec4 | 2264 | Perform loop unswitching |
de32c0cb | 2265 | |
6ff3a151 | 2266 | funwind-tables |
c662432e | 2267 | Common Report Var(flag_unwind_tables) Optimization |
f3fdaec4 | 2268 | Just generate unwind tables for exception handling |
6ff3a151 | 2269 | |
b352afba | 2270 | fuse-ld=bfd |
b78e932d | 2271 | Common Driver Negative(fuse-ld=gold) |
b352afba NC |
2272 | Use the bfd linker instead of the default linker |
2273 | ||
2274 | fuse-ld=gold | |
b78e932d | 2275 | Common Driver Negative(fuse-ld=bfd) |
b352afba NC |
2276 | Use the gold linker instead of the default linker |
2277 | ||
da18ea94 | 2278 | fuse-linker-plugin |
063d671d | 2279 | Common Undocumented Var(flag_use_linker_plugin) |
da18ea94 | 2280 | |
e90afde6 JM |
2281 | ; Positive if we should track variables, negative if we should run |
2282 | ; the var-tracking pass only to discard debug annotations, zero if | |
2283 | ; we're not to run it. When flag_var_tracking == 2 (AUTODETECT_VALUE) it | |
2284 | ; will be set according to optimize, debug_info_level and debug_hooks | |
2285 | ; in process_options (). | |
014a1138 | 2286 | fvar-tracking |
e90afde6 | 2287 | Common Report Var(flag_var_tracking) Init(2) Optimization |
014a1138 JZ |
2288 | Perform variable tracking |
2289 | ||
e90afde6 JM |
2290 | ; Positive if we should track variables at assignments, negative if |
2291 | ; we should run the var-tracking pass only to discard debug | |
2292 | ; annotations. When flag_var_tracking_assignments == | |
2293 | ; AUTODETECT_VALUE it will be set according to flag_var_tracking. | |
b5b8b0ac | 2294 | fvar-tracking-assignments |
e90afde6 | 2295 | Common Report Var(flag_var_tracking_assignments) Init(2) Optimization |
b5b8b0ac AO |
2296 | Perform variable tracking by annotating assignments |
2297 | ||
e90afde6 JM |
2298 | ; Nonzero if we should toggle flag_var_tracking_assignments after |
2299 | ; processing options and computing its default. */ | |
b5b8b0ac | 2300 | fvar-tracking-assignments-toggle |
e90afde6 | 2301 | Common Report Var(flag_var_tracking_assignments_toggle) Optimization |
b5b8b0ac AO |
2302 | Toggle -fvar-tracking-assignments |
2303 | ||
1267ca30 EB |
2304 | ; Positive if we should track uninitialized variables, negative if |
2305 | ; we should run the var-tracking pass only to discard debug | |
2306 | ; annotations. When flag_var_tracking_uninit == AUTODETECT_VALUE it | |
2307 | ; will be set according to flag_var_tracking. | |
62760ffd CT |
2308 | fvar-tracking-uninit |
2309 | Common Report Var(flag_var_tracking_uninit) Optimization | |
2310 | Perform variable tracking and also tag variables that are uninitialized | |
2311 | ||
79fe1b3b | 2312 | ftree-vectorize |
c662432e | 2313 | Common Report Var(flag_tree_vectorize) Optimization |
ea0f3e87 | 2314 | Enable vectorization on trees |
79fe1b3b | 2315 | |
78c60e3d | 2316 | ftree-vectorizer-verbose= |
477e804b SS |
2317 | Common Joined RejectNegative Ignore |
2318 | Does nothing. Preserved for backward compatibility. | |
78c60e3d | 2319 | |
ea0f3e87 XDL |
2320 | ftree-loop-vectorize |
2321 | Common Report Var(flag_tree_loop_vectorize) Optimization | |
2322 | Enable loop vectorization on trees | |
2323 | ||
a70d6342 | 2324 | ftree-slp-vectorize |
ea0f3e87 | 2325 | Common Report Var(flag_tree_slp_vectorize) Optimization |
a70d6342 IR |
2326 | Enable basic block vectorization (SLP) on trees |
2327 | ||
d6d11272 XDL |
2328 | fvect-cost-model= |
2329 | Common Joined RejectNegative Enum(vect_cost_model) Var(flag_vect_cost_model) Init(VECT_COST_MODEL_DEFAULT) | |
2330 | Specifies the cost model for vectorization | |
2331 | ||
8b5e1202 SO |
2332 | fsimd-cost-model= |
2333 | Common Joined RejectNegative Enum(vect_cost_model) Var(flag_simd_cost_model) Init(VECT_COST_MODEL_UNLIMITED) | |
2334 | Specifies the vectorization cost model for code marked with a simd directive | |
2335 | ||
d6d11272 XDL |
2336 | Enum |
2337 | Name(vect_cost_model) Type(enum vect_cost_model) UnknownError(unknown vectorizer cost model %qs) | |
2338 | ||
2339 | EnumValue | |
2340 | Enum(vect_cost_model) String(unlimited) Value(VECT_COST_MODEL_UNLIMITED) | |
2341 | ||
2342 | EnumValue | |
2343 | Enum(vect_cost_model) String(dynamic) Value(VECT_COST_MODEL_DYNAMIC) | |
2344 | ||
2345 | EnumValue | |
2346 | Enum(vect_cost_model) String(cheap) Value(VECT_COST_MODEL_CHEAP) | |
2347 | ||
792ed98b | 2348 | fvect-cost-model |
d6d11272 XDL |
2349 | Common RejectNegative Alias(fvect-cost-model=,dynamic) |
2350 | Enables the dynamic vectorizer cost model. Preserved for backward compatibility. | |
2351 | ||
2352 | fno-vect-cost-model | |
2353 | Common RejectNegative Alias(fvect-cost-model=,unlimited) | |
2354 | Enables the unlimited vectorizer cost model. Preserved for backward compatibility. | |
792ed98b | 2355 | |
c12cc930 | 2356 | ftree-vect-loop-version |
d6d11272 XDL |
2357 | Common Ignore |
2358 | Does nothing. Preserved for backward compatibility. | |
c12cc930 | 2359 | |
fbf798fc | 2360 | ftree-scev-cprop |
21af5cdf | 2361 | Common Report Var(flag_tree_scev_cprop) Init(1) Optimization |
fbf798fc DN |
2362 | Enable copy propagation of scalar-evolution information. |
2363 | ||
31b66477 KC |
2364 | ; -fverbose-asm causes extra commentary information to be produced in |
2365 | ; the generated assembly code (to make it more readable). This option | |
2366 | ; is generally only of use to those who actually need to read the | |
2367 | ; generated assembly code (perhaps while debugging the compiler itself). | |
2368 | ; -fno-verbose-asm, the default, causes the extra information | |
2369 | ; to not be added and is useful when comparing two assembler files. | |
6ff3a151 | 2370 | fverbose-asm |
50431bc4 | 2371 | Common Report Var(flag_verbose_asm) |
f3fdaec4 | 2372 | Add extra commentary to assembler output |
6ff3a151 | 2373 | |
d7afec4b | 2374 | fvisibility= |
e6d4b984 | 2375 | Common Joined RejectNegative Enum(symbol_visibility) Var(default_visibility) Init(VISIBILITY_DEFAULT) |
d7afec4b ND |
2376 | -fvisibility=[default|internal|hidden|protected] Set the default symbol visibility |
2377 | ||
e6d4b984 JM |
2378 | Enum |
2379 | Name(symbol_visibility) Type(enum symbol_visibility) UnknownError(unrecognized visibility value %qs) | |
2380 | ||
2381 | EnumValue | |
2382 | Enum(symbol_visibility) String(default) Value(VISIBILITY_DEFAULT) | |
2383 | ||
2384 | EnumValue | |
2385 | Enum(symbol_visibility) String(internal) Value(VISIBILITY_INTERNAL) | |
2386 | ||
2387 | EnumValue | |
2388 | Enum(symbol_visibility) String(hidden) Value(VISIBILITY_HIDDEN) | |
2389 | ||
2390 | EnumValue | |
2391 | Enum(symbol_visibility) String(protected) Value(VISIBILITY_PROTECTED) | |
d7afec4b | 2392 | |
2077db1b CT |
2393 | fvtable-verify= |
2394 | Common Joined RejectNegative Enum(vtv_priority) Var(flag_vtable_verify) Init(VTV_NO_PRIORITY) | |
2395 | Validate vtable pointers before using them. | |
2396 | ||
2397 | Enum | |
2398 | Name(vtv_priority) Type(enum vtv_priority) UnknownError(unknown vtable verify initialization priority %qs) | |
2399 | ||
2400 | EnumValue | |
2401 | Enum(vtv_priority) String(none) Value(VTV_NO_PRIORITY) | |
2402 | ||
2403 | EnumValue | |
2404 | Enum(vtv_priority) String(std) Value(VTV_STANDARD_PRIORITY) | |
2405 | ||
2406 | EnumValue | |
2407 | Enum(vtv_priority) String(preinit) Value(VTV_PREINIT_PRIORITY) | |
2408 | ||
2409 | fvtv-counts | |
2410 | Common Var(flag_vtv_counts) | |
2411 | Output vtable verification counters. | |
2412 | ||
2413 | fvtv-debug | |
2414 | Common Var(flag_vtv_debug) | |
2415 | Output vtable verification pointer sets information. | |
2416 | ||
fca9dc00 | 2417 | fvpt |
c662432e | 2418 | Common Report Var(flag_value_profile_transformations) Optimization |
fca9dc00 ZD |
2419 | Use expression value profiles in optimizations |
2420 | ||
62551c66 | 2421 | fweb |
c662432e | 2422 | Common Report Var(flag_web) Init(2) Optimization |
62551c66 JH |
2423 | Construct webs and split unrelated uses of single variable |
2424 | ||
c2699190 XDL |
2425 | ftree-builtin-call-dce |
2426 | Common Report Var(flag_tree_builtin_call_dce) Init(0) Optimization | |
2427 | Enable conditional dead code elimination for builtin calls | |
2428 | ||
ce91e74c | 2429 | fwhole-program |
c662432e | 2430 | Common Report Var(flag_whole_program) Init(0) Optimization |
ce91e74c JH |
2431 | Perform whole program optimizations |
2432 | ||
6ff3a151 | 2433 | fwrapv |
c662432e | 2434 | Common Report Var(flag_wrapv) Optimization |
f3fdaec4 | 2435 | Assume signed arithmetic overflow wraps around |
6ff3a151 | 2436 | |
6ff3a151 | 2437 | fzero-initialized-in-bss |
50431bc4 | 2438 | Common Report Var(flag_zero_initialized_in_bss) Init(1) |
f3fdaec4 | 2439 | Put zero initialized data in the bss section |
6ff3a151 | 2440 | |
e01cc6dc NB |
2441 | g |
2442 | Common JoinedOrMissing | |
df38ffef NB |
2443 | Generate debug information in default format |
2444 | ||
2445 | gcoff | |
6782438d | 2446 | Common JoinedOrMissing Negative(gdwarf) |
df38ffef NB |
2447 | Generate debug information in COFF format |
2448 | ||
6782438d SKS |
2449 | gdwarf |
2450 | Common JoinedOrMissing Negative(gdwarf-) | |
2451 | Generate debug information in default version of DWARF format | |
2452 | ||
53b2323e | 2453 | gdwarf- |
98095aa3 | 2454 | Common Joined UInteger Var(dwarf_version) Init(4) Negative(gstabs) |
53b2323e | 2455 | Generate debug information in DWARF v2 (or later) format |
df38ffef NB |
2456 | |
2457 | ggdb | |
2458 | Common JoinedOrMissing | |
2459 | Generate debug information in default extended format | |
2460 | ||
5175cbaf | 2461 | gno-pubnames |
7a1dd0fa | 2462 | Common Negative(gpubnames) Var(debug_generate_pub_sections, 0) Init(-1) |
5175cbaf SA |
2463 | Don't generate DWARF pubnames and pubtypes sections. |
2464 | ||
2465 | gpubnames | |
7a1dd0fa | 2466 | Common Negative(ggnu-pubnames) Var(debug_generate_pub_sections, 1) |
5175cbaf SA |
2467 | Generate DWARF pubnames and pubtypes sections. |
2468 | ||
7a1dd0fa SA |
2469 | ggnu-pubnames |
2470 | Common Negative(gno-pubnames) Var(debug_generate_pub_sections, 2) | |
2471 | Generate DWARF pubnames and pubtypes sections with GNU extensions. | |
2472 | ||
e967adf4 | 2473 | gno-record-gcc-switches |
98095aa3 | 2474 | Common RejectNegative Var(dwarf_record_gcc_switches,0) Init(1) |
e967adf4 JJ |
2475 | Don't record gcc command line switches in DWARF DW_AT_producer. |
2476 | ||
2477 | grecord-gcc-switches | |
2478 | Common RejectNegative Var(dwarf_record_gcc_switches,1) | |
2479 | Record gcc command line switches in DWARF DW_AT_producer. | |
2480 | ||
99ea153e SA |
2481 | gno-split-dwarf |
2482 | Common Driver RejectNegative Var(dwarf_split_debug_info,0) Init(0) | |
2483 | Don't generate debug information in separate .dwo files | |
2484 | ||
2485 | gsplit-dwarf | |
2486 | Common Driver RejectNegative Var(dwarf_split_debug_info,1) | |
2487 | Generate debug information in separate .dwo files | |
2488 | ||
df38ffef | 2489 | gstabs |
14c7833c | 2490 | Common JoinedOrMissing Negative(gstabs+) |
df38ffef NB |
2491 | Generate debug information in STABS format |
2492 | ||
2493 | gstabs+ | |
14c7833c | 2494 | Common JoinedOrMissing Negative(gvms) |
df38ffef NB |
2495 | Generate debug information in extended STABS format |
2496 | ||
65f753a0 | 2497 | gno-strict-dwarf |
98095aa3 | 2498 | Common RejectNegative Var(dwarf_strict,0) Init(0) |
65f753a0 JJ |
2499 | Emit DWARF additions beyond selected version |
2500 | ||
2501 | gstrict-dwarf | |
f0036cca | 2502 | Common Report RejectNegative Var(dwarf_strict,1) |
65f753a0 JJ |
2503 | Don't emit DWARF additions beyond selected version |
2504 | ||
2153915d AO |
2505 | gtoggle |
2506 | Common Report Var(flag_gtoggle) | |
2507 | Toggle debug information generation | |
2508 | ||
df38ffef | 2509 | gvms |
14c7833c | 2510 | Common JoinedOrMissing Negative(gxcoff) |
df38ffef NB |
2511 | Generate debug information in VMS format |
2512 | ||
2513 | gxcoff | |
14c7833c | 2514 | Common JoinedOrMissing Negative(gxcoff+) |
df38ffef NB |
2515 | Generate debug information in XCOFF format |
2516 | ||
2517 | gxcoff+ | |
14c7833c | 2518 | Common JoinedOrMissing Negative(gcoff) |
df38ffef | 2519 | Generate debug information in extended XCOFF format |
e01cc6dc | 2520 | |
6d721f67 JM |
2521 | h |
2522 | Driver Joined Separate | |
2523 | ||
4adbd5dd MK |
2524 | iplugindir= |
2525 | Common Joined Var(plugindir_string) Init(0) | |
2526 | -iplugindir=<dir> Set <dir> to be the default plugin directory | |
2527 | ||
e0cdc09f MK |
2528 | imultiarch |
2529 | Common Joined Separate RejectDriver Var(imultiarch) Init(0) | |
2530 | -imultiarch <dir> Set <dir> to be the multiarch include subdirectory | |
2531 | ||
603349bf JM |
2532 | l |
2533 | Driver Joined Separate | |
2534 | ||
dd9f93dc JM |
2535 | n |
2536 | Driver | |
2537 | ||
603349bf JM |
2538 | no-canonical-prefixes |
2539 | Driver | |
2540 | ||
d9d16a19 JM |
2541 | nodefaultlibs |
2542 | Driver | |
2543 | ||
bab79a40 JM |
2544 | nostartfiles |
2545 | Driver | |
2546 | ||
d9d16a19 JM |
2547 | nostdlib |
2548 | Driver | |
2549 | ||
d185d268 | 2550 | o |
d5478783 | 2551 | Common Driver Joined Separate Var(asm_file_name) MissingArgError(missing filename after %qs) |
cf03fd63 | 2552 | -o <file> Place output into <file> |
d185d268 NB |
2553 | |
2554 | p | |
50431bc4 | 2555 | Common Var(profile_flag) |
cf03fd63 | 2556 | Enable function profiling |
d185d268 | 2557 | |
603349bf JM |
2558 | pass-exit-codes |
2559 | Driver Var(pass_exit_codes) | |
2560 | ||
d185d268 | 2561 | pedantic |
c1771a20 | 2562 | Common Alias(Wpedantic) |
d185d268 NB |
2563 | |
2564 | pedantic-errors | |
d5478783 | 2565 | Common Var(flag_pedantic_errors) |
cf03fd63 | 2566 | Like -pedantic but issue them as errors |
d185d268 | 2567 | |
d9d16a19 JM |
2568 | pg |
2569 | Driver | |
2570 | ||
603349bf JM |
2571 | pipe |
2572 | Driver Var(use_pipes) | |
2573 | ||
2574 | print-file-name= | |
2575 | Driver JoinedOrMissing Var(print_file_name) | |
2576 | ||
2577 | print-libgcc-file-name | |
2578 | Driver | |
2579 | ||
2580 | print-multi-directory | |
2581 | Driver Var(print_multi_directory) | |
2582 | ||
2583 | print-multi-lib | |
2584 | Driver Var(print_multi_lib) | |
2585 | ||
2586 | print-multi-os-directory | |
2587 | Driver Var(print_multi_os_directory) | |
e0cdc09f MK |
2588 | |
2589 | print-multiarch | |
2590 | Driver Var(print_multiarch) | |
603349bf JM |
2591 | |
2592 | print-prog-name= | |
2593 | Driver JoinedOrMissing Var(print_prog_name) | |
2594 | ||
2595 | print-search-dirs | |
2596 | Driver Var(print_search_dirs) | |
2597 | ||
2598 | print-sysroot | |
2599 | Driver Var(print_sysroot) | |
2600 | ||
2601 | print-sysroot-headers-suffix | |
2602 | Driver Var(print_sysroot_headers_suffix) | |
2603 | ||
d7b42618 | 2604 | quiet |
603349bf | 2605 | Common Var(quiet_flag) RejectDriver |
cf03fd63 | 2606 | Do not display functions compiled or elapsed time |
d7b42618 | 2607 | |
dd9f93dc JM |
2608 | r |
2609 | Driver | |
2610 | ||
2611 | s | |
2612 | Driver | |
2613 | ||
603349bf JM |
2614 | save-temps |
2615 | Driver | |
2616 | ||
2617 | save-temps= | |
2618 | Driver Joined | |
2619 | ||
dd9f93dc JM |
2620 | t |
2621 | Driver | |
2622 | ||
603349bf JM |
2623 | time |
2624 | Driver Var(report_times) | |
2625 | ||
2626 | time= | |
2627 | Driver JoinedOrMissing | |
2628 | ||
e200444e JM |
2629 | u |
2630 | Driver Joined Separate | |
2631 | ||
5642f5d5 JM |
2632 | undef |
2633 | Driver | |
2634 | ; C option, but driver must not handle as "-u ndef". | |
2635 | ||
603349bf | 2636 | v |
d5478783 JM |
2637 | Common Driver Var(verbose_flag) |
2638 | Enable verbose output | |
603349bf | 2639 | |
d185d268 | 2640 | version |
603349bf | 2641 | Common Var(version_flag) RejectDriver |
cf03fd63 | 2642 | Display the compiler's version |
d185d268 NB |
2643 | |
2644 | w | |
50431bc4 | 2645 | Common Var(inhibit_warnings) |
cf03fd63 | 2646 | Suppress warnings |
d185d268 | 2647 | |
603349bf JM |
2648 | wrapper |
2649 | Driver Separate Var(wrapper_string) | |
2650 | ||
2651 | x | |
2652 | Driver Joined Separate | |
2653 | ||
528dc603 | 2654 | shared |
5460e1fc | 2655 | Driver RejectNegative Negative(pie) |
528dc603 L |
2656 | Create a shared library |
2657 | ||
603349bf JM |
2658 | shared-libgcc |
2659 | Driver | |
2660 | ||
2661 | specs | |
5de8299c | 2662 | Driver Separate Alias(specs=) |
603349bf JM |
2663 | |
2664 | specs= | |
2665 | Driver Joined | |
2666 | ||
d9d16a19 JM |
2667 | static |
2668 | Driver | |
2669 | ||
603349bf JM |
2670 | static-libgcc |
2671 | Driver | |
2672 | ||
2673 | static-libgfortran | |
2674 | Driver | |
2675 | ; Documented for Fortran, but always accepted by driver. | |
2676 | ||
2677 | static-libstdc++ | |
2678 | Driver | |
2679 | ||
7a938933 ILT |
2680 | static-libgo |
2681 | Driver | |
2682 | ; Documented for Go, but always accepted by driver. | |
2683 | ||
7e8d1b2d L |
2684 | static-libasan |
2685 | Driver | |
2686 | ||
32b4b7f5 DV |
2687 | static-libtsan |
2688 | Driver | |
2689 | ||
9065ada9 JJ |
2690 | static-liblsan |
2691 | Driver | |
2692 | ||
de5a5fa1 MP |
2693 | static-libubsan |
2694 | Driver | |
2695 | ||
e200444e JM |
2696 | symbolic |
2697 | Driver | |
2698 | ||
528dc603 | 2699 | pie |
5460e1fc | 2700 | Driver RejectNegative Negative(shared) |
528dc603 L |
2701 | Create a position independent executable |
2702 | ||
6d721f67 JM |
2703 | z |
2704 | Driver Joined Separate | |
2705 | ||
d996e61a RO |
2706 | fuse-caller-save |
2707 | Common Report Var(flag_use_caller_save) Optimization | |
2708 | Use caller save register across calls if possible | |
2709 | ||
d7b42618 | 2710 | ; This comment is to ensure we retain the blank line above. |