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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= |
ca0e51a0 JM |
811 | Common Joined RejectNegative UInteger Var(flag_abi_version) Init(0) |
812 | The version of the C++ ABI in use | |
57782ad8 | 813 | |
6e616110 RB |
814 | faggressive-loop-optimizations |
815 | Common Report Var(flag_aggressive_loop_optimizations) Optimization Init(1) | |
816 | Aggressively optimize loops using language constraints | |
817 | ||
6ff3a151 | 818 | falign-functions |
ab442df7 | 819 | Common Report Var(align_functions,0) Optimization UInteger |
f3fdaec4 | 820 | Align the start of functions |
6ff3a151 | 821 | |
058de654 | 822 | falign-functions= |
d5478783 | 823 | Common RejectNegative Joined UInteger Var(align_functions) |
058de654 | 824 | |
6ff3a151 | 825 | falign-jumps |
ab442df7 | 826 | Common Report Var(align_jumps,0) Optimization UInteger |
f3fdaec4 | 827 | Align labels which are only reached by jumping |
6ff3a151 | 828 | |
058de654 | 829 | falign-jumps= |
d5478783 | 830 | Common RejectNegative Joined UInteger Var(align_jumps) |
058de654 | 831 | |
6ff3a151 | 832 | falign-labels |
ab442df7 | 833 | Common Report Var(align_labels,0) Optimization UInteger |
f3fdaec4 | 834 | Align all labels |
6ff3a151 | 835 | |
058de654 | 836 | falign-labels= |
d5478783 | 837 | Common RejectNegative Joined UInteger Var(align_labels) |
058de654 | 838 | |
6ff3a151 | 839 | falign-loops |
3020190e | 840 | Common Report Var(align_loops,0) Optimization UInteger |
f3fdaec4 | 841 | Align the start of loops |
6ff3a151 | 842 | |
058de654 | 843 | falign-loops= |
d5478783 | 844 | Common RejectNegative Joined UInteger Var(align_loops) |
058de654 | 845 | |
6ff3a151 | 846 | fargument-alias |
2d2bd949 | 847 | Common Ignore |
0d3c82d6 | 848 | Does nothing. Preserved for backward compatibility. |
6ff3a151 NB |
849 | |
850 | fargument-noalias | |
2d2bd949 | 851 | Common Ignore |
0d3c82d6 | 852 | Does nothing. Preserved for backward compatibility. |
6ff3a151 NB |
853 | |
854 | fargument-noalias-global | |
2d2bd949 | 855 | Common Ignore |
0d3c82d6 | 856 | Does nothing. Preserved for backward compatibility. |
6ff3a151 | 857 | |
0698a1d2 | 858 | fargument-noalias-anything |
2d2bd949 | 859 | Common Ignore |
0d3c82d6 | 860 | Does nothing. Preserved for backward compatibility. |
0698a1d2 | 861 | |
de5a5fa1 MP |
862 | fsanitize= |
863 | Common Driver Report Joined | |
864 | Select what to sanitize | |
32b4b7f5 | 865 | |
1c33c9b7 JJ |
866 | fsanitize-recover |
867 | Common Report Var(flag_sanitize_recover) Init(1) | |
868 | After diagnosing undefined behavior attempt to continue execution | |
869 | ||
870 | fsanitize-undefined-trap-on-error | |
871 | Common Report Var(flag_sanitize_undefined_trap_on_error) Init(0) | |
872 | Use trap instead of a library function for undefined behavior sanitization | |
873 | ||
6ff3a151 | 874 | fasynchronous-unwind-tables |
c662432e | 875 | Common Report Var(flag_asynchronous_unwind_tables) Optimization |
f3fdaec4 | 876 | Generate unwind tables that are exact at each instruction boundary |
6ff3a151 | 877 | |
6fb5fa3c DB |
878 | fauto-inc-dec |
879 | Common Report Var(flag_auto_inc_dec) Init(1) | |
880 | Generate auto-inc/dec instructions | |
881 | ||
31b66477 KC |
882 | ; -fcheck-bounds causes gcc to generate array bounds checks. |
883 | ; For C, C++ and ObjC: defaults off. | |
884 | ; For Java: defaults to on. | |
885 | ; For Fortran: defaults to off. | |
6ff3a151 | 886 | fbounds-check |
50431bc4 | 887 | Common Report Var(flag_bounds_check) |
f3fdaec4 | 888 | Generate code to check bounds before indexing arrays |
6ff3a151 NB |
889 | |
890 | fbranch-count-reg | |
14379e66 | 891 | Common Report Var(flag_branch_on_count_reg) Optimization |
f3fdaec4 | 892 | Replace add, compare, branch with branch on count register |
6ff3a151 NB |
893 | |
894 | fbranch-probabilities | |
c662432e | 895 | Common Report Var(flag_branch_probabilities) Optimization |
f3fdaec4 | 896 | Use profiling information for branch probabilities |
6ff3a151 | 897 | |
de32c0cb | 898 | fbranch-target-load-optimize |
c662432e | 899 | Common Report Var(flag_branch_target_load_optimize) Optimization |
f3fdaec4 | 900 | Perform branch target load optimization before prologue / epilogue threading |
de32c0cb NB |
901 | |
902 | fbranch-target-load-optimize2 | |
c662432e | 903 | Common Report Var(flag_branch_target_load_optimize2) Optimization |
f3fdaec4 | 904 | Perform branch target load optimization after prologue / epilogue threading |
de32c0cb | 905 | |
1194fc79 | 906 | fbtr-bb-exclusive |
c662432e | 907 | Common Report Var(flag_btr_bb_exclusive) Optimization |
1194fc79 R |
908 | Restrict target load migration not to re-use registers in any basic block |
909 | ||
058de654 | 910 | fcall-saved- |
21bf1558 | 911 | Common Joined RejectNegative Var(common_deferred_options) Defer |
cf03fd63 | 912 | -fcall-saved-<register> Mark <register> as being preserved across functions |
058de654 NB |
913 | |
914 | fcall-used- | |
21bf1558 | 915 | Common Joined RejectNegative Var(common_deferred_options) Defer |
cf03fd63 | 916 | -fcall-used-<register> Mark <register> as being corrupted by function calls |
058de654 | 917 | |
31b66477 KC |
918 | ; Nonzero for -fcaller-saves: allocate values in regs that need to |
919 | ; be saved across function calls, if that produces overall better code. | |
920 | ; Optional now, so people can test it. | |
de32c0cb | 921 | fcaller-saves |
c662432e | 922 | Common Report Var(flag_caller_saves) Optimization |
f3fdaec4 | 923 | Save registers around function calls |
de32c0cb | 924 | |
3d8864c0 SP |
925 | fcheck-data-deps |
926 | Common Report Var(flag_check_data_deps) | |
927 | Compare the results of several data dependence analyzers. | |
928 | ||
2284b034 MG |
929 | fcheck-new |
930 | Common Var(flag_check_new) | |
931 | Check the return value of new in C++ | |
932 | ||
ccaeeafe NC |
933 | fcombine-stack-adjustments |
934 | Common Report Var(flag_combine_stack_adjustments) Optimization | |
935 | Looks for opportunities to reduce stack adjustments and stack references. | |
936 | ||
6ff3a151 | 937 | fcommon |
c662432e | 938 | Common Report Var(flag_no_common,0) Optimization |
f3fdaec4 | 939 | Do not put uninitialized globals in the common section |
6ff3a151 | 940 | |
603349bf JM |
941 | fcompare-debug |
942 | Driver | |
943 | ; Converted by the driver to -fcompare-debug= options. | |
944 | ||
2153915d | 945 | fcompare-debug= |
603349bf | 946 | Common Driver JoinedOrMissing RejectNegative Var(flag_compare_debug_opt) |
f94e1d66 | 947 | -fcompare-debug[=<opts>] Compile with and without e.g. -gtoggle, and compare the final-insns dump |
2153915d AO |
948 | |
949 | fcompare-debug-second | |
5e471ea6 | 950 | Common Driver RejectNegative Var(flag_compare_debug) |
2153915d AO |
951 | Run only the second compilation of -fcompare-debug |
952 | ||
e692f276 RH |
953 | fcompare-elim |
954 | Common Report Var(flag_compare_elim_after_reload) Optimization | |
955 | Perform comparison elimination after register allocation has finished | |
956 | ||
b5b8b0ac AO |
957 | fconserve-stack |
958 | Common Var(flag_conserve_stack) Optimization | |
959 | Do not perform optimizations increasing noticeably stack usage | |
960 | ||
6ff3a151 | 961 | fcprop-registers |
c662432e | 962 | Common Report Var(flag_cprop_registers) Optimization |
f3fdaec4 | 963 | Perform a register copy-propagation optimization pass |
6ff3a151 | 964 | |
de32c0cb | 965 | fcrossjumping |
c662432e | 966 | Common Report Var(flag_crossjumping) Optimization |
f3fdaec4 | 967 | Perform cross-jumping optimization |
de32c0cb NB |
968 | |
969 | fcse-follow-jumps | |
c662432e | 970 | Common Report Var(flag_cse_follow_jumps) Optimization |
f3fdaec4 | 971 | When running CSE, follow jumps to their targets |
de32c0cb NB |
972 | |
973 | fcse-skip-blocks | |
2d2bd949 | 974 | Common Ignore |
5f39ad47 | 975 | Does nothing. Preserved for backward compatibility. |
de32c0cb | 976 | |
c7463669 | 977 | fcx-limited-range |
5e46b0c6 | 978 | Common Report Var(flag_cx_limited_range) Optimization SetByCombined |
c7463669 RH |
979 | Omit range reduction step when performing complex division |
980 | ||
35085f76 JB |
981 | fcx-fortran-rules |
982 | Common Report Var(flag_cx_fortran_rules) Optimization | |
983 | Complex multiplication and division follow Fortran rules | |
984 | ||
6ff3a151 | 985 | fdata-sections |
c662432e | 986 | Common Report Var(flag_data_sections) Optimization |
f3fdaec4 | 987 | Place data items into their own section |
6ff3a151 | 988 | |
0a090f42 | 989 | fdbg-cnt-list |
299404a1 | 990 | Common Report Var(common_deferred_options) Defer |
0a090f42 SP |
991 | List all available debugging counters with their limits and counts. |
992 | ||
6fb5fa3c | 993 | fdbg-cnt= |
299404a1 | 994 | Common RejectNegative Joined Var(common_deferred_options) Defer |
f94e1d66 | 995 | -fdbg-cnt=<counter>:<limit>[,<counter>:<limit>,...] Set the debug counter limit. |
6fb5fa3c | 996 | |
c8aea42c | 997 | fdebug-prefix-map= |
299404a1 | 998 | Common Joined RejectNegative Var(common_deferred_options) Defer |
c8aea42c PB |
999 | Map one directory name to another in debug information |
1000 | ||
76f9db36 | 1001 | fdebug-types-section |
98095aa3 | 1002 | Common Report Var(flag_debug_types_section) Init(0) |
76f9db36 JJ |
1003 | Output .debug_types section when using DWARF v4 debuginfo. |
1004 | ||
31b66477 KC |
1005 | ; Nonzero for -fdefer-pop: don't pop args after each function call |
1006 | ; instead save them up to pop many calls' args with one insns. | |
de32c0cb | 1007 | fdefer-pop |
c662432e | 1008 | Common Report Var(flag_defer_pop) Optimization |
f3fdaec4 | 1009 | Defer popping functions args from stack until later |
de32c0cb NB |
1010 | |
1011 | fdelayed-branch | |
c662432e | 1012 | Common Report Var(flag_delayed_branch) Optimization |
f3fdaec4 | 1013 | Attempt to fill delay slots of branch instructions |
de32c0cb | 1014 | |
2da02156 EB |
1015 | fdelete-dead-exceptions |
1016 | Common Report Var(flag_delete_dead_exceptions) Init(0) | |
1017 | Delete dead instructions that may throw exceptions | |
1018 | ||
de32c0cb | 1019 | fdelete-null-pointer-checks |
1ad2f450 | 1020 | Common Report Var(flag_delete_null_pointer_checks) Init(1) Optimization |
f3fdaec4 | 1021 | Delete useless null pointer checks |
de32c0cb | 1022 | |
bbc9396b JH |
1023 | fdevirtualize-speculatively |
1024 | Common Report Var(flag_devirtualize_speculatively) Optimization | |
1025 | Perform speculative devirtualization | |
1026 | ||
ca1eedf6 JH |
1027 | fdevirtualize |
1028 | Common Report Var(flag_devirtualize) Optimization | |
1029 | Try to convert virtual calls to direct ones. | |
1030 | ||
de32c0cb | 1031 | fdiagnostics-show-location= |
e6d4b984 | 1032 | Common Joined RejectNegative Enum(diagnostic_prefixing_rule) |
cf03fd63 | 1033 | -fdiagnostics-show-location=[once|every-line] How often to emit source location at the beginning of line-wrapped diagnostics |
de32c0cb | 1034 | |
e6d4b984 JM |
1035 | ; Required for these enum values. |
1036 | SourceInclude | |
1037 | pretty-print.h | |
1038 | ||
1039 | Enum | |
1040 | Name(diagnostic_prefixing_rule) Type(int) | |
1041 | ||
1042 | EnumValue | |
1043 | Enum(diagnostic_prefixing_rule) String(once) Value(DIAGNOSTICS_SHOW_PREFIX_ONCE) | |
1044 | ||
1045 | EnumValue | |
1046 | Enum(diagnostic_prefixing_rule) String(every-line) Value(DIAGNOSTICS_SHOW_PREFIX_EVERY_LINE) | |
1047 | ||
9fec0042 MLI |
1048 | fdiagnostics-show-caret |
1049 | Common Var(flag_diagnostics_show_caret) Init(1) | |
1050 | Show the source line with a caret indicating the column | |
1051 | ||
4b84d650 JJ |
1052 | fdiagnostics-color |
1053 | Common Alias(fdiagnostics-color=,always,never) | |
1054 | ; | |
1055 | ||
1056 | fdiagnostics-color= | |
a2e836b2 | 1057 | Common Joined RejectNegative Var(flag_diagnostics_show_color) Enum(diagnostic_color_rule) Init(DIAGNOSTICS_COLOR_NO) |
4b84d650 JJ |
1058 | -fdiagnostics-color=[never|always|auto] Colorize diagnostics |
1059 | ||
1060 | ; Required for these enum values. | |
1061 | SourceInclude | |
1062 | diagnostic-color.h | |
1063 | ||
1064 | Enum | |
1065 | Name(diagnostic_color_rule) Type(int) | |
1066 | ||
1067 | EnumValue | |
1068 | Enum(diagnostic_color_rule) String(never) Value(DIAGNOSTICS_COLOR_NO) | |
1069 | ||
1070 | EnumValue | |
1071 | Enum(diagnostic_color_rule) String(always) Value(DIAGNOSTICS_COLOR_YES) | |
1072 | ||
1073 | EnumValue | |
1074 | Enum(diagnostic_color_rule) String(auto) Value(DIAGNOSTICS_COLOR_AUTO) | |
1075 | ||
ccf08a6e | 1076 | fdiagnostics-show-option |
c7d0de89 | 1077 | Common Var(flag_diagnostics_show_option) Init(1) |
c85ce869 | 1078 | Amend appropriate diagnostic messages with the command line option that controls them |
ccf08a6e | 1079 | |
226c52aa XDL |
1080 | fdisable- |
1081 | Common Joined RejectNegative Var(common_deferred_options) Defer | |
1082 | -fdisable-[tree|rtl|ipa]-<pass>=range1+range2 disables an optimization pass | |
1083 | ||
1084 | fenable- | |
1085 | Common Joined RejectNegative Var(common_deferred_options) Defer | |
1086 | -fenable-[tree|rtl|ipa]-<pass>=range1+range2 enables an optimization pass | |
1087 | ||
6de9cd9a | 1088 | fdump- |
21bf1558 | 1089 | Common Joined RejectNegative Var(common_deferred_options) Defer |
6de9cd9a DN |
1090 | -fdump-<type> Dump various compiler internals to a file |
1091 | ||
d1583032 JM |
1092 | fdump-final-insns |
1093 | Driver RejectNegative | |
1094 | ||
2153915d AO |
1095 | fdump-final-insns= |
1096 | Common RejectNegative Joined Var(flag_dump_final_insns) | |
1097 | -fdump-final-insns=filename Dump to filename the insns at the end of translation | |
1098 | ||
c6a13190 ILT |
1099 | fdump-go-spec= |
1100 | Common RejectNegative Joined Var(flag_dump_go_spec) | |
1101 | -fdump-go-spec=filename Write all declarations to file as Go code | |
1102 | ||
24a7799e R |
1103 | fdump-noaddr |
1104 | Common Report Var(flag_dump_noaddr) | |
1105 | Suppress output of addresses in debugging dumps | |
1106 | ||
deced1e2 XDL |
1107 | fdump-passes |
1108 | Common Var(flag_dump_passes) Init(0) | |
1109 | Dump optimization passes | |
1110 | ||
6ff3a151 | 1111 | fdump-unnumbered |
e90afde6 | 1112 | Common Report Var(flag_dump_unnumbered) |
24a7799e | 1113 | Suppress output of instruction numbers, line number notes and addresses in debugging dumps |
6ff3a151 | 1114 | |
2aa7c49b | 1115 | fdump-unnumbered-links |
e90afde6 | 1116 | Common Report Var(flag_dump_unnumbered_links) |
2aa7c49b AO |
1117 | Suppress output of previous and next insn numbers in debugging dumps |
1118 | ||
b5b8b0ac AO |
1119 | fdwarf2-cfi-asm |
1120 | Common Report Var(flag_dwarf2_cfi_asm) Init(HAVE_GAS_CFI_DIRECTIVE) | |
1121 | Enable CFI tables via GAS assembler directives. | |
1122 | ||
355866de | 1123 | fearly-inlining |
c662432e | 1124 | Common Report Var(flag_early_inlining) Init(1) Optimization |
355866de RG |
1125 | Perform early inlining |
1126 | ||
de32c0cb | 1127 | feliminate-dwarf2-dups |
50431bc4 | 1128 | Common Report Var(flag_eliminate_dwarf2_dups) |
f3fdaec4 | 1129 | Perform DWARF2 duplicate elimination |
de32c0cb | 1130 | |
07ffa034 MJ |
1131 | fipa-sra |
1132 | Common Report Var(flag_ipa_sra) Init(0) Optimization | |
1133 | Perform interprocedural reduction of aggregates | |
1134 | ||
6a08f7b3 | 1135 | feliminate-unused-debug-symbols |
50431bc4 | 1136 | Common Report Var(flag_debug_only_used_symbols) |
f3fdaec4 | 1137 | Perform unused type elimination in debug info |
6a08f7b3 | 1138 | |
de32c0cb | 1139 | feliminate-unused-debug-types |
50431bc4 | 1140 | Common Report Var(flag_eliminate_unused_debug_types) Init(1) |
f3fdaec4 | 1141 | Perform unused type elimination in debug info |
de32c0cb | 1142 | |
e713adf6 | 1143 | femit-class-debug-always |
eae8e474 | 1144 | Common Report Var(flag_emit_class_debug_always) Init(0) |
e713adf6 CD |
1145 | Do not suppress C++ class debug information. |
1146 | ||
6ff3a151 | 1147 | fexceptions |
c662432e | 1148 | Common Report Var(flag_exceptions) Optimization |
f3fdaec4 | 1149 | Enable exception handling |
6ff3a151 | 1150 | |
de32c0cb | 1151 | fexpensive-optimizations |
c662432e | 1152 | Common Report Var(flag_expensive_optimizations) Optimization |
f3fdaec4 | 1153 | Perform a number of minor, expensive optimizations |
de32c0cb | 1154 | |
8ce94e44 | 1155 | fexcess-precision= |
e6d4b984 | 1156 | Common Joined RejectNegative Enum(excess_precision) Var(flag_excess_precision_cmdline) Init(EXCESS_PRECISION_DEFAULT) |
8ce94e44 JM |
1157 | -fexcess-precision=[fast|standard] Specify handling of excess floating-point precision |
1158 | ||
e6d4b984 JM |
1159 | Enum |
1160 | Name(excess_precision) Type(enum excess_precision) UnknownError(unknown excess precision style %qs) | |
1161 | ||
1162 | EnumValue | |
1163 | Enum(excess_precision) String(fast) Value(EXCESS_PRECISION_FAST) | |
1164 | ||
1165 | EnumValue | |
1166 | Enum(excess_precision) String(standard) Value(EXCESS_PRECISION_STANDARD) | |
1167 | ||
058de654 NB |
1168 | ffast-math |
1169 | Common | |
1170 | ||
cc8547a7 | 1171 | ffat-lto-objects |
e9f67e62 | 1172 | Common Var(flag_fat_lto_objects) |
cc8547a7 AK |
1173 | Output lto objects containing both the intermediate language and binary output. |
1174 | ||
6ff3a151 | 1175 | ffinite-math-only |
5e46b0c6 | 1176 | Common Report Var(flag_finite_math_only) Optimization SetByCombined |
f3fdaec4 | 1177 | Assume no NaNs or infinities are generated |
6ff3a151 | 1178 | |
058de654 | 1179 | ffixed- |
21bf1558 | 1180 | Common Joined RejectNegative Var(common_deferred_options) Defer |
cf03fd63 | 1181 | -ffixed-<register> Mark <register> as being unavailable to the compiler |
058de654 | 1182 | |
de32c0cb | 1183 | ffloat-store |
c662432e | 1184 | Common Report Var(flag_float_store) Optimization |
31b66477 | 1185 | Don't allocate floats and doubles in extended-precision registers |
de32c0cb NB |
1186 | |
1187 | fforce-addr | |
2d2bd949 | 1188 | Common Ignore |
3de5e93a | 1189 | Does nothing. Preserved for backward compatibility. |
de32c0cb | 1190 | |
2ca2b607 SB |
1191 | fforward-propagate |
1192 | Common Report Var(flag_forward_propagate) Optimization | |
a52b023a PB |
1193 | Perform a forward propagation pass on RTL |
1194 | ||
16949072 | 1195 | ffp-contract= |
e6d4b984 | 1196 | Common Joined RejectNegative Enum(fp_contract_mode) Var(flag_fp_contract_mode) Init(FP_CONTRACT_FAST) |
16949072 RG |
1197 | -ffp-contract=[off|on|fast] Perform floating-point expression contraction. |
1198 | ||
e6d4b984 JM |
1199 | Enum |
1200 | Name(fp_contract_mode) Type(enum fp_contract_mode) UnknownError(unknown floating point contraction style %qs) | |
1201 | ||
1202 | EnumValue | |
1203 | Enum(fp_contract_mode) String(off) Value(FP_CONTRACT_OFF) | |
1204 | ||
1205 | ; Not implemented, fall back to conservative FP_CONTRACT_OFF. | |
1206 | EnumValue | |
1207 | Enum(fp_contract_mode) String(on) Value(FP_CONTRACT_OFF) | |
1208 | ||
1209 | EnumValue | |
1210 | Enum(fp_contract_mode) String(fast) Value(FP_CONTRACT_FAST) | |
1211 | ||
31b66477 KC |
1212 | ; Nonzero means don't put addresses of constant functions in registers. |
1213 | ; Used for compiling the Unix kernel, where strange substitutions are | |
1214 | ; done on the assembly output. | |
de32c0cb | 1215 | ffunction-cse |
50431bc4 | 1216 | Common Report Var(flag_no_function_cse,0) |
f3fdaec4 | 1217 | Allow function addresses to be held in registers |
de32c0cb | 1218 | |
6ff3a151 | 1219 | ffunction-sections |
50431bc4 | 1220 | Common Report Var(flag_function_sections) |
f3fdaec4 | 1221 | Place each function into its own section |
6ff3a151 | 1222 | |
de32c0cb | 1223 | fgcse |
c662432e | 1224 | Common Report Var(flag_gcse) Optimization |
f3fdaec4 | 1225 | Perform global common subexpression elimination |
de32c0cb NB |
1226 | |
1227 | fgcse-lm | |
c662432e | 1228 | Common Report Var(flag_gcse_lm) Init(1) Optimization |
f3fdaec4 | 1229 | Perform enhanced load motion during global common subexpression elimination |
de32c0cb NB |
1230 | |
1231 | fgcse-sm | |
c662432e | 1232 | Common Report Var(flag_gcse_sm) Init(0) Optimization |
f3fdaec4 | 1233 | Perform store motion after global common subexpression elimination |
de32c0cb | 1234 | |
f5f2e3cd | 1235 | fgcse-las |
c662432e | 1236 | Common Report Var(flag_gcse_las) Init(0) Optimization |
f9957958 MH |
1237 | Perform redundant load after store elimination in global common subexpression |
1238 | elimination | |
1239 | ||
1240 | fgcse-after-reload | |
c662432e | 1241 | Common Report Var(flag_gcse_after_reload) Optimization |
f9957958 | 1242 | Perform global common subexpression elimination after register allocation |
c85ce869 | 1243 | has finished |
f5f2e3cd | 1244 | |
d0a58904 | 1245 | ; This option is not documented yet as its semantics will change. |
f8bf9252 SP |
1246 | fgraphite |
1247 | Common Report Var(flag_graphite) | |
1248 | Enable in and out of Graphite representation | |
1249 | ||
204b560f SP |
1250 | fgraphite-identity |
1251 | Common Report Var(flag_graphite_identity) Optimization | |
1252 | Enable Graphite Identity transformation | |
1253 | ||
372a6eb8 BS |
1254 | fhoist-adjacent-loads |
1255 | Common Report Var(flag_hoist_adjacent_loads) Optimization | |
1256 | Enable hoisting adjacent loads to encourage generating conditional move | |
1257 | instructions | |
1258 | ||
3cf0e270 SP |
1259 | floop-parallelize-all |
1260 | Common Report Var(flag_loop_parallelize_all) Optimization | |
204b560f SP |
1261 | Mark all loops as parallel |
1262 | ||
f8bf9252 SP |
1263 | floop-strip-mine |
1264 | Common Report Var(flag_loop_strip_mine) Optimization | |
1265 | Enable Loop Strip Mining transformation | |
1266 | ||
1267 | floop-interchange | |
1268 | Common Report Var(flag_loop_interchange) Optimization | |
1269 | Enable Loop Interchange transformation | |
1270 | ||
1271 | floop-block | |
1272 | Common Report Var(flag_loop_block) Optimization | |
1273 | Enable Loop Blocking transformation | |
1274 | ||
0a35513e AH |
1275 | fgnu-tm |
1276 | Common Report Var(flag_tm) | |
1277 | Enable support for GNU transactional memory | |
1278 | ||
da34ade5 JM |
1279 | fgnu-unique |
1280 | Common Report Var(flag_gnu_unique) Init(1) | |
1281 | Use STB_GNU_UNIQUE if supported by the assembler | |
1282 | ||
98af4c9f | 1283 | floop-flatten |
093193be MK |
1284 | Common Ignore |
1285 | Does nothing. Preserved for backward compatibility. | |
98af4c9f | 1286 | |
b60cc080 TG |
1287 | floop-nest-optimize |
1288 | Common Report Var(flag_loop_optimize_isl) Optimization | |
1289 | Enable the ISL based loop nest optimizer | |
1290 | ||
6a78b724 DD |
1291 | fstrict-volatile-bitfields |
1292 | Common Report Var(flag_strict_volatile_bitfields) Init(-1) | |
1293 | Force bitfield accesses to match their type width | |
1294 | ||
6ff3a151 | 1295 | fguess-branch-probability |
c662432e | 1296 | Common Report Var(flag_guess_branch_prob) Optimization |
f3fdaec4 | 1297 | Enable guessing of branch probabilities |
6ff3a151 | 1298 | |
31b66477 KC |
1299 | ; Nonzero means ignore `#ident' directives. 0 means handle them. |
1300 | ; Generate position-independent code for executables if possible | |
1301 | ; On SVR4 targets, it also controls whether or not to emit a | |
1302 | ; string identifying the compiler. | |
6ff3a151 | 1303 | fident |
50431bc4 | 1304 | Common Report Var(flag_no_ident,0) |
f3fdaec4 | 1305 | Process #ident directives |
6ff3a151 | 1306 | |
de32c0cb | 1307 | fif-conversion |
c662432e | 1308 | Common Report Var(flag_if_conversion) Optimization |
f3fdaec4 | 1309 | Perform conversion of conditional jumps to branchless equivalents |
de32c0cb NB |
1310 | |
1311 | fif-conversion2 | |
c662432e | 1312 | Common Report Var(flag_if_conversion2) Optimization |
f3fdaec4 | 1313 | Perform conversion of conditional jumps to conditional execution |
de32c0cb | 1314 | |
87e2a8fd XDL |
1315 | fstack-reuse= |
1316 | Common Joined RejectNegative Enum(stack_reuse_level) Var(flag_stack_reuse) Init(SR_ALL) | |
1317 | -fstack-reuse=[all|named_vars|none] Set stack reuse level for local variables. | |
1318 | ||
1319 | Enum | |
1320 | Name(stack_reuse_level) Type(enum stack_reuse_level) UnknownError(unknown Stack Reuse Level %qs) | |
1321 | ||
1322 | EnumValue | |
1323 | Enum(stack_reuse_level) String(all) Value(SR_ALL) | |
1324 | ||
1325 | EnumValue | |
1326 | Enum(stack_reuse_level) String(named_vars) Value(SR_NAMED_VARS) | |
1327 | ||
1328 | EnumValue | |
1329 | Enum(stack_reuse_level) String(none) Value(SR_NONE) | |
1330 | ||
384a5197 SP |
1331 | ftree-loop-if-convert |
1332 | Common Report Var(flag_tree_loop_if_convert) Init(-1) Optimization | |
1333 | Convert conditional jumps in innermost loops to branchless equivalents | |
1334 | ||
bd544141 SP |
1335 | ftree-loop-if-convert-stores |
1336 | Common Report Var(flag_tree_loop_if_convert_stores) Optimization | |
1337 | Also if-convert conditional jumps containing memory writes | |
1338 | ||
31b66477 KC |
1339 | ; -finhibit-size-directive inhibits output of .size for ELF. |
1340 | ; This is used only for compiling crtstuff.c, | |
1341 | ; and it may be extended to other effects | |
1342 | ; needed for crtstuff.c on other systems. | |
6ff3a151 | 1343 | finhibit-size-directive |
50431bc4 | 1344 | Common Report Var(flag_inhibit_size_directive) |
f3fdaec4 | 1345 | Do not generate .size directives |
6ff3a151 | 1346 | |
3e293154 MJ |
1347 | findirect-inlining |
1348 | Common Report Var(flag_indirect_inlining) | |
1349 | Perform indirect inlining | |
1350 | ||
99ea07f8 RG |
1351 | ; General flag to enable inlining. Specifying -fno-inline will disable |
1352 | ; all inlining apart from always-inline functions. | |
de32c0cb | 1353 | finline |
0f042bc5 | 1354 | Common Report Var(flag_no_inline,0) Init(0) Optimization |
99ea07f8 | 1355 | Enable inlining of function declared \"inline\", disabling disables all inlining |
de32c0cb | 1356 | |
4d4b8cb9 JH |
1357 | finline-small-functions |
1358 | Common Report Var(flag_inline_small_functions) Optimization | |
99ea07f8 | 1359 | Integrate functions into their callers when code size is known not to grow |
4d4b8cb9 | 1360 | |
de32c0cb | 1361 | finline-functions |
c662432e | 1362 | Common Report Var(flag_inline_functions) Optimization |
99ea07f8 | 1363 | Integrate functions not declared \"inline\" into their callers when profitable |
de32c0cb | 1364 | |
355866de | 1365 | finline-functions-called-once |
fb37c1de | 1366 | Common Report Var(flag_inline_functions_called_once) Optimization |
99ea07f8 | 1367 | Integrate functions only required by their single caller |
d63db217 | 1368 | |
d302c9d6 | 1369 | finline-limit- |
5de8299c | 1370 | Common RejectNegative Joined Alias(finline-limit=) |
d302c9d6 NB |
1371 | |
1372 | finline-limit= | |
1373 | Common RejectNegative Joined UInteger | |
cf03fd63 | 1374 | -finline-limit=<number> Limit the size of inlined functions to <number> |
d302c9d6 | 1375 | |
86951993 AM |
1376 | finline-atomics |
1377 | Common Report Var(flag_inline_atomics) Init(1) Optimization | |
1378 | Inline __atomic operations when a lock free instruction sequence is available. | |
1379 | ||
6ff3a151 | 1380 | finstrument-functions |
50431bc4 | 1381 | Common Report Var(flag_instrument_function_entry_exit) |
f3fdaec4 | 1382 | Instrument function entry and exit with profiling calls |
6ff3a151 | 1383 | |
8d5a7d1f ILT |
1384 | finstrument-functions-exclude-function-list= |
1385 | Common RejectNegative Joined | |
1386 | -finstrument-functions-exclude-function-list=name,... Do not instrument listed functions | |
1387 | ||
1388 | finstrument-functions-exclude-file-list= | |
1389 | Common RejectNegative Joined | |
1390 | -finstrument-functions-exclude-file-list=filename,... Do not instrument functions listed in files | |
1391 | ||
d6e14e8f | 1392 | fipa-cp |
c662432e | 1393 | Common Report Var(flag_ipa_cp) Optimization |
bbc9396b | 1394 | Perform interprocedural constant propagation |
d6e14e8f | 1395 | |
5e45130d JH |
1396 | fipa-cp-clone |
1397 | Common Report Var(flag_ipa_cp_clone) Optimization | |
1398 | Perform cloning to make Interprocedural constant propagation stronger | |
1399 | ||
e65bb9be JH |
1400 | fipa-profile |
1401 | Common Report Var(flag_ipa_profile) Init(0) Optimization | |
1402 | Perform interprocedural profile propagation | |
ea900239 | 1403 | |
4cf4d6a3 | 1404 | fipa-pta |
c662432e | 1405 | Common Report Var(flag_ipa_pta) Init(0) Optimization |
4cf4d6a3 DB |
1406 | Perform interprocedural points-to analysis |
1407 | ||
e65bb9be JH |
1408 | fipa-pure-const |
1409 | Common Report Var(flag_ipa_pure_const) Init(0) Optimization | |
1410 | Discover pure and const functions | |
1411 | ||
ea900239 | 1412 | fipa-reference |
c662432e | 1413 | Common Report Var(flag_ipa_reference) Init(0) Optimization |
ea900239 DB |
1414 | Discover readonly and non addressable static variables |
1415 | ||
43d861a5 | 1416 | fipa-matrix-reorg |
04f92ff4 RG |
1417 | Common Ignore |
1418 | Does nothing. Preserved for backward compatibility. | |
43d861a5 | 1419 | |
e1dc98b2 | 1420 | fipa-struct-reorg |
b8beb4d1 RG |
1421 | Common Ignore |
1422 | Does nothing. Preserved for backward compatibility. | |
e1dc98b2 | 1423 | |
058e97ec | 1424 | fira-algorithm= |
e6d4b984 | 1425 | Common Joined RejectNegative Enum(ira_algorithm) Var(flag_ira_algorithm) Init(IRA_ALGORITHM_CB) |
7db7ed3c VM |
1426 | -fira-algorithm=[CB|priority] Set the used IRA algorithm |
1427 | ||
e6d4b984 JM |
1428 | Enum |
1429 | Name(ira_algorithm) Type(enum ira_algorithm) UnknownError(unknown IRA algorithm %qs) | |
1430 | ||
1431 | EnumValue | |
1432 | Enum(ira_algorithm) String(CB) Value(IRA_ALGORITHM_CB) | |
1433 | ||
1434 | EnumValue | |
1435 | Enum(ira_algorithm) String(priority) Value(IRA_ALGORITHM_PRIORITY) | |
1436 | ||
7db7ed3c | 1437 | fira-region= |
ffe8727f | 1438 | Common Joined RejectNegative Enum(ira_region) Var(flag_ira_region) Init(IRA_REGION_AUTODETECT) |
7db7ed3c | 1439 | -fira-region=[one|all|mixed] Set regions for IRA |
058e97ec | 1440 | |
e6d4b984 JM |
1441 | Enum |
1442 | Name(ira_region) Type(enum ira_region) UnknownError(unknown IRA region %qs) | |
1443 | ||
1444 | EnumValue | |
1445 | Enum(ira_region) String(one) Value(IRA_REGION_ONE) | |
1446 | ||
1447 | EnumValue | |
1448 | Enum(ira_region) String(all) Value(IRA_REGION_ALL) | |
1449 | ||
1450 | EnumValue | |
1451 | Enum(ira_region) String(mixed) Value(IRA_REGION_MIXED) | |
1452 | ||
b11f0116 BC |
1453 | fira-hoist-pressure |
1454 | Common Report Var(flag_ira_hoist_pressure) Init(1) Optimization | |
1455 | Use IRA based register pressure calculation | |
1456 | in RTL hoist optimizations. | |
1457 | ||
1833192f | 1458 | fira-loop-pressure |
f3d83ffe | 1459 | Common Report Var(flag_ira_loop_pressure) Optimization |
1833192f VM |
1460 | Use IRA based register pressure calculation |
1461 | in RTL loop optimizations. | |
1462 | ||
058e97ec VM |
1463 | fira-share-save-slots |
1464 | Common Report Var(flag_ira_share_save_slots) Init(1) | |
1465 | Share slots for saving different hard registers. | |
1466 | ||
1467 | fira-share-spill-slots | |
1468 | Common Report Var(flag_ira_share_spill_slots) Init(1) | |
1469 | Share stack slots for spilled pseudo-registers. | |
1470 | ||
1471 | fira-verbose= | |
5498f011 | 1472 | Common RejectNegative Joined UInteger Var(flag_ira_verbose) Init(5) |
f94e1d66 | 1473 | -fira-verbose=<number> Control IRA's level of diagnostic messages. |
058e97ec | 1474 | |
8b11a64c | 1475 | fivopts |
c662432e | 1476 | Common Report Var(flag_ivopts) Init(1) Optimization |
8b11a64c ZD |
1477 | Optimize induction variables on trees |
1478 | ||
82c0180d | 1479 | fjump-tables |
c662432e | 1480 | Common Var(flag_jump_tables) Init(1) Optimization |
82c0180d JM |
1481 | Use jump tables for sufficiently large switch statements |
1482 | ||
de32c0cb | 1483 | fkeep-inline-functions |
50431bc4 | 1484 | Common Report Var(flag_keep_inline_functions) |
f3fdaec4 | 1485 | Generate code for functions even if they are fully inlined |
de32c0cb NB |
1486 | |
1487 | fkeep-static-consts | |
50431bc4 | 1488 | Common Report Var(flag_keep_static_consts) Init(1) |
f3fdaec4 | 1489 | Emit static const variables even if they are not used |
de32c0cb | 1490 | |
6ff3a151 | 1491 | fleading-underscore |
50431bc4 | 1492 | Common Report Var(flag_leading_underscore) Init(-1) |
f3fdaec4 | 1493 | Give external symbols a leading underscore |
6ff3a151 | 1494 | |
efa1cdf0 | 1495 | floop-optimize |
2d2bd949 | 1496 | Common Ignore |
c0220ea4 | 1497 | Does nothing. Preserved for backward compatibility. |
efa1cdf0 | 1498 | |
d7f09764 | 1499 | flto |
014d92e1 | 1500 | Common |
d7f09764 DN |
1501 | Enable link-time optimization. |
1502 | ||
014d92e1 JH |
1503 | flto= |
1504 | Common RejectNegative Joined Var(flag_lto) | |
1505 | Link-time optimization with number of parallel jobs or jobserver. | |
1506 | ||
783dab6b RB |
1507 | Enum |
1508 | Name(lto_partition_model) Type(enum lto_partition_model) UnknownError(unknown LTO partitioning model %qs) | |
852e4bd2 | 1509 | |
783dab6b RB |
1510 | EnumValue |
1511 | Enum(lto_partition_model) String(none) Value(LTO_PARTITION_NONE) | |
852e4bd2 | 1512 | |
783dab6b RB |
1513 | EnumValue |
1514 | Enum(lto_partition_model) String(one) Value(LTO_PARTITION_ONE) | |
1515 | ||
1516 | EnumValue | |
1517 | Enum(lto_partition_model) String(balanced) Value(LTO_PARTITION_BALANCED) | |
1518 | ||
1519 | EnumValue | |
1520 | Enum(lto_partition_model) String(1to1) Value(LTO_PARTITION_1TO1) | |
1521 | ||
1522 | EnumValue | |
1523 | Enum(lto_partition_model) String(max) Value(LTO_PARTITION_MAX) | |
c3c445e1 | 1524 | |
783dab6b RB |
1525 | flto-partition= |
1526 | Common Joined RejectNegative Enum(lto_partition_model) Var(flag_lto_partition) Init(LTO_PARTITION_BALANCED) | |
1527 | Specify the algorithm to partition symbols and vars at linktime | |
014d92e1 | 1528 | |
d7f09764 DN |
1529 | ; The initial value of -1 comes from Z_DEFAULT_COMPRESSION in zlib.h. |
1530 | flto-compression-level= | |
fcfbd84e | 1531 | Common Joined RejectNegative UInteger Var(flag_lto_compression_level) Init(-1) |
f94e1d66 | 1532 | -flto-compression-level=<number> Use zlib compression level <number> for IL |
d7f09764 DN |
1533 | |
1534 | flto-report | |
1d67dde8 | 1535 | Common Report Var(flag_lto_report) Init(0) |
d7f09764 DN |
1536 | Report various link-time optimization statistics |
1537 | ||
057f8f20 AK |
1538 | flto-report-wpa |
1539 | Common Report Var(flag_lto_report_wpa) Init(0) | |
1540 | Report various link-time optimization statistics for WPA only | |
1541 | ||
6ff3a151 | 1542 | fmath-errno |
5e46b0c6 | 1543 | Common Report Var(flag_errno_math) Init(1) Optimization SetByCombined |
f3fdaec4 | 1544 | Set errno after built-in math functions |
6ff3a151 | 1545 | |
3a789837 NF |
1546 | fmax-errors= |
1547 | Common Joined RejectNegative UInteger Var(flag_max_errors) | |
1548 | -fmax-errors=<number> Maximum number of errors to report | |
1549 | ||
6ff3a151 | 1550 | fmem-report |
50431bc4 | 1551 | Common Report Var(mem_report) |
f3fdaec4 | 1552 | Report on permanent memory allocation |
6ff3a151 | 1553 | |
b3e44629 AK |
1554 | fmem-report-wpa |
1555 | Common Report Var(mem_report_wpa) | |
1556 | Report on permanent memory allocation in WPA only | |
1557 | ||
31b66477 KC |
1558 | ; This will attempt to merge constant section constants, if 1 only |
1559 | ; string constants and constants from constant pool, if 2 also constant | |
1560 | ; variables. | |
6ff3a151 | 1561 | fmerge-all-constants |
c662432e | 1562 | Common Report Var(flag_merge_constants,2) Init(1) Optimization |
f3fdaec4 | 1563 | Attempt to merge identical constants and constant variables |
6ff3a151 NB |
1564 | |
1565 | fmerge-constants | |
f0036cca | 1566 | Common Report Var(flag_merge_constants,1) Optimization |
f3fdaec4 | 1567 | Attempt to merge identical constants across compilation units |
6ff3a151 | 1568 | |
28a08168 ILT |
1569 | fmerge-debug-strings |
1570 | Common Report Var(flag_merge_debug_strings) Init(1) | |
1571 | Attempt to merge identical debug strings across compilation units | |
1572 | ||
de32c0cb NB |
1573 | fmessage-length= |
1574 | Common RejectNegative Joined UInteger | |
cf03fd63 | 1575 | -fmessage-length=<number> Limit diagnostics to <number> characters per line. 0 suppresses line-wrapping |
de32c0cb | 1576 | |
e5626198 | 1577 | fmodulo-sched |
c662432e | 1578 | Common Report Var(flag_modulo_sched) Optimization |
e5626198 AZ |
1579 | Perform SMS based modulo scheduling before the first scheduling pass |
1580 | ||
517d76fa VY |
1581 | fmodulo-sched-allow-regmoves |
1582 | Common Report Var(flag_modulo_sched_allow_regmoves) | |
1583 | Perform SMS based modulo scheduling with register moves allowed | |
1584 | ||
5e962776 | 1585 | fmove-loop-invariants |
14379e66 | 1586 | Common Report Var(flag_move_loop_invariants) Optimization |
5e962776 ZD |
1587 | Move loop invariant computations out of loops |
1588 | ||
6fb5fa3c | 1589 | fdce |
6ae4be32 | 1590 | Common Var(flag_dce) Init(1) Optimization |
6fb5fa3c DB |
1591 | Use the RTL dead code elimination pass |
1592 | ||
1593 | fdse | |
6ae4be32 | 1594 | Common Var(flag_dse) Init(1) Optimization |
6fb5fa3c DB |
1595 | Use the RTL dead store elimination pass |
1596 | ||
d72372e4 | 1597 | freschedule-modulo-scheduled-loops |
c662432e | 1598 | Common Report Var(flag_resched_modulo_sched) Optimization |
d72372e4 MH |
1599 | Enable/Disable the traditional scheduling in loops that already passed modulo scheduling |
1600 | ||
6ff3a151 | 1601 | fnon-call-exceptions |
c662432e | 1602 | Common Report Var(flag_non_call_exceptions) Optimization |
f3fdaec4 | 1603 | Support synchronous non-call exceptions |
6ff3a151 | 1604 | |
de32c0cb | 1605 | fomit-frame-pointer |
c662432e | 1606 | Common Report Var(flag_omit_frame_pointer) Optimization |
f3fdaec4 | 1607 | When possible do not generate stack frames |
de32c0cb | 1608 | |
78c60e3d SS |
1609 | fopt-info |
1610 | Common Report Var(flag_opt_info) Optimization | |
1611 | Enable all optimization info dumps on stderr | |
1612 | ||
1613 | fopt-info- | |
1614 | Common Joined RejectNegative Var(common_deferred_options) Defer | |
1615 | -fopt-info[-<type>=filename] Dump compiler optimization details | |
1616 | ||
6ff3a151 | 1617 | foptimize-register-move |
3b6d1699 VM |
1618 | Common Ignore |
1619 | Does nothing. Preserved for backward compatibility. | |
6ff3a151 | 1620 | |
de32c0cb | 1621 | foptimize-sibling-calls |
c662432e | 1622 | Common Report Var(flag_optimize_sibling_calls) Optimization |
f3fdaec4 | 1623 | Optimize sibling and tail recursive calls |
de32c0cb | 1624 | |
3e485f62 JH |
1625 | fpartial-inlining |
1626 | Common Report Var(flag_partial_inlining) | |
1627 | Perform partial inlining | |
1628 | ||
a5573239 JH |
1629 | fpre-ipa-mem-report |
1630 | Common Report Var(pre_ipa_mem_report) | |
1631 | Report on memory allocation before interprocedural optimization | |
1632 | ||
1633 | fpost-ipa-mem-report | |
1634 | Common Report Var(post_ipa_mem_report) | |
1635 | Report on memory allocation before interprocedural optimization | |
1636 | ||
6ff3a151 | 1637 | fpack-struct |
c662432e | 1638 | Common Report Var(flag_pack_struct) Optimization |
f3fdaec4 | 1639 | Pack structure members together without holes |
6ff3a151 | 1640 | |
467cecf3 | 1641 | fpack-struct= |
c662432e | 1642 | Common RejectNegative Joined UInteger Optimization |
467cecf3 JB |
1643 | -fpack-struct=<number> Set initial maximum structure member alignment |
1644 | ||
de32c0cb | 1645 | fpcc-struct-return |
5498f011 | 1646 | Common Report Var(flag_pcc_struct_return,1) Init(DEFAULT_PCC_STRUCT_RETURN) |
f3fdaec4 | 1647 | Return small aggregates in memory, not registers |
de32c0cb NB |
1648 | |
1649 | fpeel-loops | |
c662432e | 1650 | Common Report Var(flag_peel_loops) Optimization |
f3fdaec4 | 1651 | Perform loop peeling |
de32c0cb NB |
1652 | |
1653 | fpeephole | |
c662432e | 1654 | Common Report Var(flag_no_peephole,0) Optimization |
f3fdaec4 | 1655 | Enable machine specific peephole optimizations |
de32c0cb | 1656 | |
6ff3a151 | 1657 | fpeephole2 |
c662432e | 1658 | Common Report Var(flag_peephole2) Optimization |
f3fdaec4 | 1659 | Enable an RTL peephole pass before sched2 |
6ff3a151 | 1660 | |
31b66477 | 1661 | fPIC |
da0aa2cc | 1662 | Common Report Var(flag_pic,2) Negative(fPIE) |
31b66477 KC |
1663 | Generate position-independent code if possible (large mode) |
1664 | ||
1665 | fPIE | |
da0aa2cc | 1666 | Common Report Var(flag_pie,2) Negative(fpic) |
31b66477 KC |
1667 | Generate position-independent code for executables if possible (large mode) |
1668 | ||
6ff3a151 | 1669 | fpic |
da0aa2cc | 1670 | Common Report Var(flag_pic,1) Negative(fpie) |
31b66477 | 1671 | Generate position-independent code if possible (small mode) |
6ff3a151 NB |
1672 | |
1673 | fpie | |
da0aa2cc | 1674 | Common Report Var(flag_pie,1) Negative(fPIC) |
31b66477 | 1675 | Generate position-independent code for executables if possible (small mode) |
6ff3a151 | 1676 | |
68a607d8 | 1677 | fplugin= |
21bf1558 | 1678 | Common Joined RejectNegative Var(common_deferred_options) Defer |
68a607d8 DN |
1679 | Specify a plugin to load |
1680 | ||
1681 | fplugin-arg- | |
21bf1558 | 1682 | Common Joined RejectNegative Var(common_deferred_options) Defer |
f94e1d66 | 1683 | -fplugin-arg-<name>-<key>[=<value>] Specify argument <key>=<value> for plugin <name> |
68a607d8 | 1684 | |
bbc8a8dc | 1685 | fpredictive-commoning |
6ae4be32 | 1686 | Common Report Var(flag_predictive_commoning) Optimization |
bbc8a8dc ZD |
1687 | Run predictive commoning optimization. |
1688 | ||
de32c0cb | 1689 | fprefetch-loop-arrays |
1fbb509a | 1690 | Common Report Var(flag_prefetch_loop_arrays) Init(-1) Optimization |
f3fdaec4 | 1691 | Generate prefetch instructions, if available, for arrays in loops |
de32c0cb | 1692 | |
6ff3a151 | 1693 | fprofile |
50431bc4 | 1694 | Common Report Var(profile_flag) |
f3fdaec4 | 1695 | Enable basic program profiling code |
6ff3a151 NB |
1696 | |
1697 | fprofile-arcs | |
50431bc4 | 1698 | Common Report Var(profile_arc_flag) |
f3fdaec4 | 1699 | Insert arc-based program profiling code |
6ff3a151 | 1700 | |
2f908293 | 1701 | fprofile-dir= |
0576d21f | 1702 | Common Joined RejectNegative Var(profile_data_prefix) |
2f908293 SP |
1703 | Set the top-level directory for storing the profile data. |
1704 | The default is 'pwd'. | |
1705 | ||
52c76998 PY |
1706 | fprofile-correction |
1707 | Common Report Var(flag_profile_correction) | |
1708 | Enable correction of flow inconsistent profile data input | |
1709 | ||
a8a5f53a JH |
1710 | fprofile-generate |
1711 | Common | |
1712 | Enable common options for generating profile info for profile feedback directed optimizations | |
1713 | ||
2f908293 SP |
1714 | fprofile-generate= |
1715 | Common Joined RejectNegative | |
1716 | Enable common options for generating profile info for profile feedback directed optimizations, and set -fprofile-dir= | |
1717 | ||
a8a5f53a | 1718 | fprofile-use |
2f908293 | 1719 | Common Var(flag_profile_use) |
a8a5f53a JH |
1720 | Enable common options for performing profile feedback directed optimizations |
1721 | ||
2f908293 SP |
1722 | fprofile-use= |
1723 | Common Joined RejectNegative | |
1724 | Enable common options for performing profile feedback directed optimizations, and set -fprofile-dir= | |
1725 | ||
fca9dc00 | 1726 | fprofile-values |
50431bc4 | 1727 | Common Report Var(flag_profile_values) |
fca9dc00 ZD |
1728 | Insert code to profile values of expressions |
1729 | ||
37e5402b JH |
1730 | fprofile-report |
1731 | Common Report Var(profile_report) | |
1732 | Report on consistency of profile | |
1733 | ||
9cec31f4 ML |
1734 | fprofile-reorder-functions |
1735 | Common Report Var(flag_profile_reorder_functions) | |
1736 | Enable function reordering that improves code placement | |
1737 | ||
de32c0cb | 1738 | frandom-seed |
299404a1 | 1739 | Common Var(common_deferred_options) Defer |
de32c0cb NB |
1740 | |
1741 | frandom-seed= | |
299404a1 | 1742 | Common Joined RejectNegative Var(common_deferred_options) Defer |
cf03fd63 | 1743 | -frandom-seed=<string> Make compile reproducible using <string> |
de32c0cb | 1744 | |
e0d9d0dd NC |
1745 | ; This switch causes the command line that was used to create an |
1746 | ; object file to be recorded into the object file. The exact format | |
1747 | ; of this recording is target and binary file format dependent. | |
1748 | ; It is related to the -fverbose-asm switch, but that switch only | |
1749 | ; records information in the assembler output file as comments, so | |
1750 | ; they never reach the object file. | |
1751 | frecord-gcc-switches | |
1752 | Common Report Var(flag_record_gcc_switches) | |
1753 | Record gcc command line switches in the object file. | |
1754 | ||
de32c0cb | 1755 | freg-struct-return |
f0036cca | 1756 | Common Report Var(flag_pcc_struct_return,0) Optimization |
f3fdaec4 | 1757 | Return small aggregates in registers |
de32c0cb | 1758 | |
6ff3a151 | 1759 | fregmove |
3b6d1699 VM |
1760 | Common Ignore |
1761 | Does nothing. Preserved for backward compatibility. | |
6ff3a151 | 1762 | |
f20f2613 VM |
1763 | flive-range-shrinkage |
1764 | Common Report Var(flag_live_range_shrinkage) Init(0) Optimization | |
1765 | Relief of register pressure through live range shrinkage | |
1766 | ||
6ff3a151 | 1767 | frename-registers |
c662432e | 1768 | Common Report Var(flag_rename_registers) Init(2) Optimization |
f3fdaec4 | 1769 | Perform a register renaming optimization pass |
6ff3a151 NB |
1770 | |
1771 | freorder-blocks | |
c662432e | 1772 | Common Report Var(flag_reorder_blocks) Optimization |
f3fdaec4 | 1773 | Reorder basic blocks to improve code placement |
6ff3a151 | 1774 | |
750054a2 | 1775 | freorder-blocks-and-partition |
c662432e | 1776 | Common Report Var(flag_reorder_blocks_and_partition) Optimization |
750054a2 CT |
1777 | Reorder basic blocks and partition into hot and cold sections |
1778 | ||
6ff3a151 | 1779 | freorder-functions |
c662432e | 1780 | Common Report Var(flag_reorder_functions) Optimization |
f3fdaec4 | 1781 | Reorder functions to improve code placement |
6ff3a151 | 1782 | |
de32c0cb | 1783 | frerun-cse-after-loop |
3020190e | 1784 | Common Report Var(flag_rerun_cse_after_loop) Optimization |
f3fdaec4 | 1785 | Add a common subexpression elimination pass after loop optimizations |
de32c0cb | 1786 | |
efa1cdf0 | 1787 | frerun-loop-opt |
2d2bd949 | 1788 | Common Ignore |
c0220ea4 | 1789 | Does nothing. Preserved for backward compatibility. |
efa1cdf0 | 1790 | |
039c3d42 | 1791 | frounding-math |
5e46b0c6 | 1792 | Common Report Var(flag_rounding_math) Optimization SetByCombined |
039c3d42 RS |
1793 | Disable optimizations that assume default FP rounding behavior |
1794 | ||
6ff3a151 | 1795 | fsched-interblock |
c662432e | 1796 | Common Report Var(flag_schedule_interblock) Init(1) Optimization |
f3fdaec4 | 1797 | Enable scheduling across basic blocks |
6ff3a151 | 1798 | |
ce18efcb VM |
1799 | fsched-pressure |
1800 | Common Report Var(flag_sched_pressure) Init(0) Optimization | |
1801 | Enable register pressure sensitive insn scheduling | |
1802 | ||
6ff3a151 | 1803 | fsched-spec |
c662432e | 1804 | Common Report Var(flag_schedule_speculative) Init(1) Optimization |
f3fdaec4 | 1805 | Allow speculative motion of non-loads |
6ff3a151 NB |
1806 | |
1807 | fsched-spec-load | |
c662432e | 1808 | Common Report Var(flag_schedule_speculative_load) Optimization |
f3fdaec4 | 1809 | Allow speculative motion of some loads |
6ff3a151 NB |
1810 | |
1811 | fsched-spec-load-dangerous | |
c662432e | 1812 | Common Report Var(flag_schedule_speculative_load_dangerous) Optimization |
f3fdaec4 | 1813 | Allow speculative motion of more loads |
6ff3a151 | 1814 | |
de32c0cb | 1815 | fsched-verbose= |
299404a1 | 1816 | Common RejectNegative Joined UInteger Var(sched_verbose_param) |
cf03fd63 | 1817 | -fsched-verbose=<number> Set the verbosity level of the scheduler |
de32c0cb | 1818 | |
6ff3a151 | 1819 | fsched2-use-superblocks |
c662432e | 1820 | Common Report Var(flag_sched2_use_superblocks) Optimization |
f3fdaec4 | 1821 | If scheduling post reload, do superblock scheduling |
6ff3a151 NB |
1822 | |
1823 | fsched2-use-traces | |
2d2bd949 | 1824 | Common Ignore |
57257f0d | 1825 | Does nothing. Preserved for backward compatibility. |
6ff3a151 | 1826 | |
de32c0cb | 1827 | fschedule-insns |
c662432e | 1828 | Common Report Var(flag_schedule_insns) Optimization |
f3fdaec4 | 1829 | Reschedule instructions before register allocation |
de32c0cb NB |
1830 | |
1831 | fschedule-insns2 | |
c662432e | 1832 | Common Report Var(flag_schedule_insns_after_reload) Optimization |
f3fdaec4 | 1833 | Reschedule instructions after register allocation |
de32c0cb | 1834 | |
e855c69d AB |
1835 | ; This flag should be on when a target implements non-trivial |
1836 | ; scheduling hooks, maybe saving some information for its own sake. | |
1837 | ; On IA64, for example, this is used for correct bundling. | |
1838 | fselective-scheduling | |
1839 | Common Report Var(flag_selective_scheduling) Optimization | |
1840 | Schedule instructions using selective scheduling algorithm | |
1841 | ||
1842 | fselective-scheduling2 | |
1843 | Common Report Var(flag_selective_scheduling2) Optimization | |
1844 | Run selective scheduling after reload | |
1845 | ||
1846 | fsel-sched-pipelining | |
1847 | Common Report Var(flag_sel_sched_pipelining) Init(0) Optimization | |
1848 | Perform software pipelining of inner loops during selective scheduling | |
1849 | ||
1850 | fsel-sched-pipelining-outer-loops | |
1851 | Common Report Var(flag_sel_sched_pipelining_outer_loops) Init(0) Optimization | |
1852 | Perform software pipelining of outer loops during selective scheduling | |
1853 | ||
1854 | fsel-sched-reschedule-pipelined | |
1855 | Common Report Var(flag_sel_sched_reschedule_pipelined) Init(0) Optimization | |
1856 | Reschedule pipelined regions without pipelining | |
1857 | ||
e288a46c JH |
1858 | fsemantic-interposition |
1859 | Common Report Var(flag_semantic_interposition) Init(1) | |
1860 | Allow interposing function (or variables) by ones with different semantics (or initializer) respectively by dynamic linker | |
1861 | ||
31b66477 KC |
1862 | ; sched_stalled_insns means that insns can be moved prematurely from the queue |
1863 | ; of stalled insns into the ready list. | |
569fa502 | 1864 | fsched-stalled-insns |
ab442df7 | 1865 | Common Report Var(flag_sched_stalled_insns) Optimization UInteger |
569fa502 DN |
1866 | Allow premature scheduling of queued insns |
1867 | ||
1868 | fsched-stalled-insns= | |
c22cacf3 | 1869 | Common RejectNegative Joined UInteger |
4e994432 | 1870 | -fsched-stalled-insns=<number> Set number of queued insns that can be prematurely scheduled |
569fa502 | 1871 | |
31b66477 KC |
1872 | ; sched_stalled_insns_dep controls how many recently scheduled cycles will |
1873 | ; be examined for a dependency on a stalled insn that is candidate for | |
1874 | ; premature removal from the queue of stalled insns into the ready list (has | |
1875 | ; an effect only if the flag 'sched_stalled_insns' is set). | |
569fa502 | 1876 | fsched-stalled-insns-dep |
ab442df7 | 1877 | Common Report Var(flag_sched_stalled_insns_dep,1) Init(1) Optimization UInteger |
569fa502 DN |
1878 | Set dependence distance checking in premature scheduling of queued insns |
1879 | ||
1880 | fsched-stalled-insns-dep= | |
1881 | Common RejectNegative Joined UInteger | |
4e994432 | 1882 | -fsched-stalled-insns-dep=<number> Set dependence distance checking in premature scheduling of queued insns |
569fa502 | 1883 | |
ee4764a8 GS |
1884 | fsched-group-heuristic |
1885 | Common Report Var(flag_sched_group_heuristic) Init(1) Optimization | |
1886 | Enable the group heuristic in the scheduler | |
1887 | ||
1888 | fsched-critical-path-heuristic | |
1889 | Common Report Var(flag_sched_critical_path_heuristic) Init(1) Optimization | |
1890 | Enable the critical path heuristic in the scheduler | |
1891 | ||
1892 | fsched-spec-insn-heuristic | |
1893 | Common Report Var(flag_sched_spec_insn_heuristic) Init(1) Optimization | |
1894 | Enable the speculative instruction heuristic in the scheduler | |
1895 | ||
ee4764a8 GS |
1896 | fsched-rank-heuristic |
1897 | Common Report Var(flag_sched_rank_heuristic) Init(1) Optimization | |
1898 | Enable the rank heuristic in the scheduler | |
1899 | ||
1900 | fsched-last-insn-heuristic | |
1901 | Common Report Var(flag_sched_last_insn_heuristic) Init(1) Optimization | |
1902 | Enable the last instruction heuristic in the scheduler | |
1903 | ||
1904 | fsched-dep-count-heuristic | |
1905 | Common Report Var(flag_sched_dep_count_heuristic) Init(1) Optimization | |
1906 | Enable the dependent count heuristic in the scheduler | |
1907 | ||
aacd3885 | 1908 | fsection-anchors |
c662432e | 1909 | Common Report Var(flag_section_anchors) Optimization |
aacd3885 RS |
1910 | Access data in the same section from shared anchor points |
1911 | ||
8cd37d0b | 1912 | fsee |
2d2bd949 | 1913 | Common Ignore |
8393a9c8 | 1914 | Does nothing. Preserved for backward compatibility. |
8cd37d0b | 1915 | |
87a0ebfd | 1916 | fzee |
26cd9add EI |
1917 | Common Ignore |
1918 | Does nothing. Preserved for backward compatibility. | |
1919 | ||
1920 | free | |
1921 | Common Report Var(flag_ree) Init(0) | |
1922 | Turn on Redundant Extensions Elimination pass. | |
87a0ebfd | 1923 | |
8abb6b22 | 1924 | fshow-column |
1cb42611 | 1925 | Common Report Var(flag_show_column) Init(1) |
e74fe492 | 1926 | Show column numbers in diagnostics, when available. Default on |
8abb6b22 | 1927 | |
484db665 BS |
1928 | fshrink-wrap |
1929 | Common Report Var(flag_shrink_wrap) Optimization | |
1930 | Emit function prologues only before parts of the function that need it, | |
1931 | rather than at the top of the function. | |
1932 | ||
6ff3a151 | 1933 | fsignaling-nans |
5e46b0c6 | 1934 | Common Report Var(flag_signaling_nans) Optimization SetByCombined |
f3fdaec4 | 1935 | Disable optimizations observable by IEEE signaling NaNs |
6ff3a151 | 1936 | |
db02da79 | 1937 | fsigned-zeros |
5e46b0c6 | 1938 | Common Report Var(flag_signed_zeros) Init(1) Optimization SetByCombined |
db02da79 RS |
1939 | Disable floating point optimizations that ignore the IEEE signedness of zero |
1940 | ||
6ff3a151 | 1941 | fsingle-precision-constant |
c662432e | 1942 | Common Report Var(flag_single_precision_constant) Optimization |
f3fdaec4 | 1943 | Convert floating point constants to single precision constants |
6ff3a151 | 1944 | |
113d659a | 1945 | fsplit-ivs-in-unroller |
c662432e | 1946 | Common Report Var(flag_split_ivs_in_unroller) Init(1) Optimization |
c85ce869 | 1947 | Split lifetimes of induction variables when loops are unrolled |
113d659a | 1948 | |
7458026b ILT |
1949 | fsplit-stack |
1950 | Common Report Var(flag_split_stack) Init(-1) | |
1951 | Generate discontiguous stack frames | |
1952 | ||
e53a16e7 | 1953 | fsplit-wide-types |
21af5cdf | 1954 | Common Report Var(flag_split_wide_types) Optimization |
e53a16e7 ILT |
1955 | Split wide types into independent registers |
1956 | ||
68f6df73 RB |
1957 | fssa-phiopt |
1958 | Common Report Var(flag_ssa_phiopt) Optimization | |
1959 | Optimize conditional patterns using SSA PHI nodes | |
1960 | ||
f37a4f14 | 1961 | fvariable-expansion-in-unroller |
c662432e | 1962 | Common Report Var(flag_variable_expansion_in_unroller) Optimization |
c85ce869 | 1963 | Apply variable expansion when loops are unrolled |
f37a4f14 | 1964 | |
b38f3813 EB |
1965 | fstack-check= |
1966 | Common Report RejectNegative Joined | |
1967 | -fstack-check=[no|generic|specific] Insert stack checking code into the program | |
1968 | ||
6ff3a151 | 1969 | fstack-check |
5de8299c | 1970 | Common Alias(fstack-check=, specific, no) |
b38f3813 | 1971 | Insert stack checking code into the program. Same as -fstack-check=specific |
6ff3a151 | 1972 | |
de32c0cb | 1973 | fstack-limit |
21bf1558 | 1974 | Common Var(common_deferred_options) Defer |
de32c0cb | 1975 | |
058de654 | 1976 | fstack-limit-register= |
21bf1558 | 1977 | Common RejectNegative Joined Var(common_deferred_options) Defer |
cf03fd63 | 1978 | -fstack-limit-register=<register> Trap if the stack goes past <register> |
058de654 NB |
1979 | |
1980 | fstack-limit-symbol= | |
21bf1558 | 1981 | Common RejectNegative Joined Var(common_deferred_options) Defer |
cf03fd63 | 1982 | -fstack-limit-symbol=<name> Trap if the stack goes past symbol <name> |
058de654 | 1983 | |
7d69de61 RH |
1984 | fstack-protector |
1985 | Common Report Var(flag_stack_protect, 1) | |
1986 | Use propolice as a stack protection method | |
1987 | ||
1988 | fstack-protector-all | |
f0036cca | 1989 | Common Report RejectNegative Var(flag_stack_protect, 2) |
7d69de61 RH |
1990 | Use a stack protection method for every function |
1991 | ||
f6bc1c4a HS |
1992 | fstack-protector-strong |
1993 | Common Report RejectNegative Var(flag_stack_protect, 3) | |
1994 | Use a smart stack protection method for certain functions | |
1995 | ||
d3c12306 EB |
1996 | fstack-usage |
1997 | Common RejectNegative Var(flag_stack_usage) | |
1998 | Output stack usage information on a per-function basis | |
1999 | ||
de32c0cb | 2000 | fstrength-reduce |
2d2bd949 | 2001 | Common Ignore |
c0220ea4 | 2002 | Does nothing. Preserved for backward compatibility. |
de32c0cb | 2003 | |
31b66477 KC |
2004 | ; Nonzero if we should do (language-dependent) alias analysis. |
2005 | ; Typically, this analysis will assume that expressions of certain | |
2006 | ; types do not alias expressions of certain other types. Only used | |
2007 | ; if alias analysis (in general) is enabled. | |
6ff3a151 | 2008 | fstrict-aliasing |
c662432e | 2009 | Common Report Var(flag_strict_aliasing) Optimization |
f3fdaec4 | 2010 | Assume strict aliasing rules apply |
6ff3a151 | 2011 | |
eeef0e45 ILT |
2012 | fstrict-overflow |
2013 | Common Report Var(flag_strict_overflow) | |
2014 | Treat signed overflow as undefined | |
2015 | ||
e8053cf5 RH |
2016 | fsync-libcalls |
2017 | Common Report Var(flag_sync_libcalls) Init(1) | |
2018 | Implement __atomic operations via libcalls to legacy __sync functions | |
2019 | ||
de32c0cb | 2020 | fsyntax-only |
50431bc4 | 2021 | Common Report Var(flag_syntax_only) |
f3fdaec4 | 2022 | Check for syntax errors, then stop |
de32c0cb | 2023 | |
6ff3a151 | 2024 | ftest-coverage |
50431bc4 | 2025 | Common Report Var(flag_test_coverage) |
f3fdaec4 | 2026 | Create data files needed by \"gcov\" |
6ff3a151 | 2027 | |
de32c0cb | 2028 | fthread-jumps |
c662432e | 2029 | Common Report Var(flag_thread_jumps) Optimization |
f3fdaec4 | 2030 | Perform jump threading optimizations |
de32c0cb | 2031 | |
6ff3a151 | 2032 | ftime-report |
50431bc4 | 2033 | Common Report Var(time_report) |
f3fdaec4 | 2034 | Report the time taken by each compiler pass |
6ff3a151 | 2035 | |
058de654 | 2036 | ftls-model= |
e6d4b984 | 2037 | Common Joined RejectNegative Enum(tls_model) Var(flag_tls_default) Init(TLS_MODEL_GLOBAL_DYNAMIC) |
cf03fd63 | 2038 | -ftls-model=[global-dynamic|local-dynamic|initial-exec|local-exec] Set the default thread-local storage code generation model |
058de654 | 2039 | |
e6d4b984 JM |
2040 | Enum |
2041 | Name(tls_model) Type(enum tls_model) UnknownError(unknown TLS model %qs) | |
2042 | ||
2043 | EnumValue | |
2044 | Enum(tls_model) String(global-dynamic) Value(TLS_MODEL_GLOBAL_DYNAMIC) | |
2045 | ||
2046 | EnumValue | |
2047 | Enum(tls_model) String(local-dynamic) Value(TLS_MODEL_LOCAL_DYNAMIC) | |
2048 | ||
2049 | EnumValue | |
2050 | Enum(tls_model) String(initial-exec) Value(TLS_MODEL_INITIAL_EXEC) | |
2051 | ||
2052 | EnumValue | |
2053 | Enum(tls_model) String(local-exec) Value(TLS_MODEL_LOCAL_EXEC) | |
2054 | ||
474eccc6 | 2055 | ftoplevel-reorder |
d6cc6ec9 | 2056 | Common Report Var(flag_toplevel_reorder) Init(2) Optimization |
474eccc6 ILT |
2057 | Reorder top level functions, variables, and asms |
2058 | ||
de32c0cb | 2059 | ftracer |
50431bc4 | 2060 | Common Report Var(flag_tracer) |
f3fdaec4 | 2061 | Perform superblock formation via tail duplication |
de32c0cb | 2062 | |
31b66477 KC |
2063 | ; Zero means that floating-point math operations cannot generate a |
2064 | ; (user-visible) trap. This is the case, for example, in nonstop | |
2065 | ; IEEE 754 arithmetic. | |
6ff3a151 | 2066 | ftrapping-math |
5e46b0c6 | 2067 | Common Report Var(flag_trapping_math) Init(1) Optimization SetByCombined |
f3fdaec4 | 2068 | Assume floating-point operations can trap |
6ff3a151 NB |
2069 | |
2070 | ftrapv | |
c662432e | 2071 | Common Report Var(flag_trapv) Optimization |
f3fdaec4 | 2072 | Trap for signed overflow in addition, subtraction and multiplication |
6ff3a151 | 2073 | |
6de9cd9a | 2074 | ftree-ccp |
c662432e | 2075 | Common Report Var(flag_tree_ccp) Optimization |
6de9cd9a DN |
2076 | Enable SSA-CCP optimization on trees |
2077 | ||
0b4b14ac RG |
2078 | ftree-bit-ccp |
2079 | Common Report Var(flag_tree_bit_ccp) Optimization | |
2080 | Enable SSA-BIT-CCP optimization on trees | |
2081 | ||
0bca51f0 | 2082 | ftree-store-ccp |
2d2bd949 | 2083 | Common Ignore |
dce2b2f6 | 2084 | Does nothing. Preserved for backward compatibility. |
0bca51f0 | 2085 | |
6de9cd9a | 2086 | ftree-ch |
c662432e | 2087 | Common Report Var(flag_tree_ch) Optimization |
6de9cd9a DN |
2088 | Enable loop header copying on trees |
2089 | ||
21d01365 AO |
2090 | ftree-coalesce-inlined-vars |
2091 | Common Report Var(flag_ssa_coalesce_vars,1) Init(2) RejectNegative Optimization | |
2092 | Enable coalescing of copy-related user variables that are inlined | |
2093 | ||
2094 | ftree-coalesce-vars | |
2095 | Common Report Var(flag_ssa_coalesce_vars,2) Optimization | |
2096 | Enable coalescing of all copy-related user variables | |
2097 | ||
6de9cd9a | 2098 | ftree-copyrename |
c662432e | 2099 | Common Report Var(flag_tree_copyrename) Optimization |
c85ce869 | 2100 | Replace SSA temporaries with better names in copies |
6de9cd9a | 2101 | |
0bca51f0 | 2102 | ftree-copy-prop |
c662432e | 2103 | Common Report Var(flag_tree_copy_prop) Optimization |
0bca51f0 DN |
2104 | Enable copy propagation on trees |
2105 | ||
2106 | ftree-store-copy-prop | |
2d2bd949 | 2107 | Common Ignore |
e9033855 | 2108 | Does nothing. Preserved for backward compatibility. |
0bca51f0 | 2109 | |
a5828d1e MM |
2110 | ftree-cselim |
2111 | Common Report Var(flag_tree_cselim) Init(2) Optimization | |
2112 | Transform condition stores into unconditional ones | |
2113 | ||
b6e99746 MJ |
2114 | ftree-switch-conversion |
2115 | Common Report Var(flag_tree_switch_conversion) Optimization | |
2116 | Perform conversions of switch initializations. | |
2117 | ||
6de9cd9a | 2118 | ftree-dce |
c662432e | 2119 | Common Report Var(flag_tree_dce) Optimization |
6de9cd9a DN |
2120 | Enable SSA dead code elimination optimization on trees |
2121 | ||
2122 | ftree-dominator-opts | |
c662432e | 2123 | Common Report Var(flag_tree_dom) Optimization |
6de9cd9a DN |
2124 | Enable dominator optimizations |
2125 | ||
c9e93168 TV |
2126 | ftree-tail-merge |
2127 | Common Report Var(flag_tree_tail_merge) Optimization | |
2128 | Enable tail merging on trees | |
2129 | ||
6de9cd9a | 2130 | ftree-dse |
c662432e | 2131 | Common Report Var(flag_tree_dse) Optimization |
6de9cd9a DN |
2132 | Enable dead store elimination |
2133 | ||
248fc9f3 RG |
2134 | ftree-forwprop |
2135 | Common Report Var(flag_tree_forwprop) Init(1) Optimization | |
2136 | Enable forward propagation on trees | |
2137 | ||
ff2ad0f7 | 2138 | ftree-fre |
c662432e | 2139 | Common Report Var(flag_tree_fre) Optimization |
ff2ad0f7 DN |
2140 | Enable Full Redundancy Elimination (FRE) on trees |
2141 | ||
8b57bfeb JJ |
2142 | foptimize-strlen |
2143 | Common Report Var(flag_optimize_strlen) Optimization | |
2144 | Enable string length optimizations on trees | |
2145 | ||
ae93744d JL |
2146 | fisolate-erroneous-paths-dereference |
2147 | Common Report Var(flag_isolate_erroneous_paths_dereference) Optimization | |
2148 | Detect paths which trigger erroneous or undefined behaviour due to | |
2149 | dereferencing a NULL pointer. Isolate those paths from the main control | |
2150 | flow and turn the statement with erroneous or undefined behaviour into a trap. | |
2151 | ||
2152 | fisolate-erroneous-paths-attribute | |
2153 | Common Report Var(flag_isolate_erroneous_paths_attribute) Optimization | |
2154 | Detect paths which trigger erroneous or undefined behaviour due a NULL value | |
2155 | being used in a way which is forbidden by a returns_nonnull or nonnull | |
2156 | attribute. Isolate those paths from the main control flow and turn the | |
2157 | statement with erroneous or undefined behaviour into a trap. | |
8fdc414d | 2158 | |
dea61d92 | 2159 | ftree-loop-distribution |
53ed2f0e | 2160 | Common Report Var(flag_tree_loop_distribution) Optimization |
dea61d92 SP |
2161 | Enable loop distribution on trees |
2162 | ||
20769d5e SP |
2163 | ftree-loop-distribute-patterns |
2164 | Common Report Var(flag_tree_loop_distribute_patterns) Optimization | |
2165 | Enable loop distribution for patterns transformed into a library call | |
2166 | ||
1b08d87d | 2167 | ftree-loop-im |
c662432e | 2168 | Common Report Var(flag_tree_loop_im) Init(1) Optimization |
a7e5372d ZD |
2169 | Enable loop invariant motion on trees |
2170 | ||
599eabdb | 2171 | ftree-loop-linear |
7633415c SP |
2172 | Common Alias(floop-interchange) |
2173 | Enable loop interchange transforms. Same as -floop-interchange | |
599eabdb | 2174 | |
1b08d87d | 2175 | ftree-loop-ivcanon |
c662432e | 2176 | Common Report Var(flag_tree_loop_ivcanon) Init(1) Optimization |
1b08d87d DB |
2177 | Create canonical induction variables in loops |
2178 | ||
c66b6c66 | 2179 | ftree-loop-optimize |
c662432e | 2180 | Common Report Var(flag_tree_loop_optimize) Init(1) Optimization |
c66b6c66 ZD |
2181 | Enable loop optimizations on tree level |
2182 | ||
5f40b3cb | 2183 | ftree-parallelize-loops= |
fcfbd84e | 2184 | Common Report Joined RejectNegative UInteger Var(flag_tree_parallelize_loops) Init(1) |
5f40b3cb ZD |
2185 | Enable automatic parallelization of loops |
2186 | ||
248fc9f3 RG |
2187 | ftree-phiprop |
2188 | Common Report Var(flag_tree_phiprop) Init(1) Optimization | |
2189 | Enable hoisting loads from conditional pointers. | |
2190 | ||
6de9cd9a | 2191 | ftree-pre |
c662432e | 2192 | Common Report Var(flag_tree_pre) Optimization |
6de9cd9a DN |
2193 | Enable SSA-PRE optimization on trees |
2194 | ||
fa06ad0d JR |
2195 | ftree-partial-pre |
2196 | Common Report Var(flag_tree_partial_pre) Optimization | |
2197 | In SSA-PRE optimization on trees, enable partial-partial redundancy elimination | |
2198 | ||
248fc9f3 | 2199 | ftree-pta |
14379e66 | 2200 | Common Report Var(flag_tree_pta) Optimization |
248fc9f3 RG |
2201 | Perform function-local points-to analysis on trees. |
2202 | ||
13c59415 UB |
2203 | ftree-reassoc |
2204 | Common Report Var(flag_tree_reassoc) Init(1) Optimization | |
2205 | Enable reassociation on tree level | |
2206 | ||
c75ab022 | 2207 | ftree-salias |
2d2bd949 | 2208 | Common Ignore |
1353232d | 2209 | Does nothing. Preserved for backward compatibility. |
c75ab022 | 2210 | |
fa555252 | 2211 | ftree-sink |
c662432e | 2212 | Common Report Var(flag_tree_sink) Optimization |
fa555252 DB |
2213 | Enable SSA code sinking on trees |
2214 | ||
75cfe445 BS |
2215 | ftree-slsr |
2216 | Common Report Var(flag_tree_slsr) Optimization | |
2217 | Perform straight-line strength reduction | |
2218 | ||
6de9cd9a | 2219 | ftree-sra |
c662432e | 2220 | Common Report Var(flag_tree_sra) Optimization |
6de9cd9a DN |
2221 | Perform scalar replacement of aggregates |
2222 | ||
2223 | ftree-ter | |
3020190e | 2224 | Common Report Var(flag_tree_ter) Optimization |
6de9cd9a DN |
2225 | Replace temporary expressions in the SSA->normal pass |
2226 | ||
c662432e NC |
2227 | ftree-lrs |
2228 | Common Report Var(flag_tree_live_range_split) Optimization | |
2229 | Perform live range splitting during the SSA->normal pass | |
2230 | ||
0bca51f0 | 2231 | ftree-vrp |
c662432e | 2232 | Common Report Var(flag_tree_vrp) Init(0) Optimization |
0bca51f0 DN |
2233 | Perform Value Range Propagation on trees |
2234 | ||
de32c0cb | 2235 | funit-at-a-time |
d6cc6ec9 | 2236 | Common Report Var(flag_unit_at_a_time) Init(1) Optimization |
f3fdaec4 | 2237 | Compile whole compilation unit at a time |
de32c0cb NB |
2238 | |
2239 | funroll-loops | |
c662432e | 2240 | Common Report Var(flag_unroll_loops) Optimization |
f3fdaec4 | 2241 | Perform loop unrolling when iteration count is known |
de32c0cb NB |
2242 | |
2243 | funroll-all-loops | |
c662432e | 2244 | Common Report Var(flag_unroll_all_loops) Optimization |
f3fdaec4 | 2245 | Perform loop unrolling for all loops |
de32c0cb | 2246 | |
f9cc1a70 PB |
2247 | ; Nonzero means that loop optimizer may assume that the induction variables |
2248 | ; that control loops do not overflow and that the loops with nontrivial | |
2249 | ; exit condition are not infinite | |
2250 | funsafe-loop-optimizations | |
c662432e | 2251 | Common Report Var(flag_unsafe_loop_optimizations) Optimization |
f9cc1a70 PB |
2252 | Allow loop optimizations to assume that the loops behave in normal way |
2253 | ||
a1a82611 | 2254 | fassociative-math |
5e46b0c6 | 2255 | Common Report Var(flag_associative_math) SetByCombined |
a1a82611 RE |
2256 | Allow optimization for floating-point arithmetic which may change the |
2257 | result of the operation due to rounding. | |
2258 | ||
2259 | freciprocal-math | |
5e46b0c6 | 2260 | Common Report Var(flag_reciprocal_math) SetByCombined |
a1a82611 RE |
2261 | Same as -fassociative-math for expressions which include division. |
2262 | ||
31b66477 KC |
2263 | ; Nonzero means that unsafe floating-point math optimizations are allowed |
2264 | ; for the sake of speed. IEEE compliance is not guaranteed, and operations | |
2265 | ; are allowed to assume that their arguments and results are "normal" | |
2266 | ; (e.g., nonnegative for SQRT). | |
6ff3a151 | 2267 | funsafe-math-optimizations |
5e46b0c6 | 2268 | Common Report Var(flag_unsafe_math_optimizations) Optimization SetByCombined |
f3fdaec4 | 2269 | Allow math optimizations that may violate IEEE or ISO standards |
6ff3a151 | 2270 | |
de32c0cb | 2271 | funswitch-loops |
c662432e | 2272 | Common Report Var(flag_unswitch_loops) Optimization |
f3fdaec4 | 2273 | Perform loop unswitching |
de32c0cb | 2274 | |
6ff3a151 | 2275 | funwind-tables |
c662432e | 2276 | Common Report Var(flag_unwind_tables) Optimization |
f3fdaec4 | 2277 | Just generate unwind tables for exception handling |
6ff3a151 | 2278 | |
b352afba | 2279 | fuse-ld=bfd |
b78e932d | 2280 | Common Driver Negative(fuse-ld=gold) |
b352afba NC |
2281 | Use the bfd linker instead of the default linker |
2282 | ||
2283 | fuse-ld=gold | |
b78e932d | 2284 | Common Driver Negative(fuse-ld=bfd) |
b352afba NC |
2285 | Use the gold linker instead of the default linker |
2286 | ||
da18ea94 | 2287 | fuse-linker-plugin |
063d671d | 2288 | Common Undocumented Var(flag_use_linker_plugin) |
da18ea94 | 2289 | |
e90afde6 JM |
2290 | ; Positive if we should track variables, negative if we should run |
2291 | ; the var-tracking pass only to discard debug annotations, zero if | |
2292 | ; we're not to run it. When flag_var_tracking == 2 (AUTODETECT_VALUE) it | |
2293 | ; will be set according to optimize, debug_info_level and debug_hooks | |
2294 | ; in process_options (). | |
014a1138 | 2295 | fvar-tracking |
e90afde6 | 2296 | Common Report Var(flag_var_tracking) Init(2) Optimization |
014a1138 JZ |
2297 | Perform variable tracking |
2298 | ||
e90afde6 JM |
2299 | ; Positive if we should track variables at assignments, negative if |
2300 | ; we should run the var-tracking pass only to discard debug | |
2301 | ; annotations. When flag_var_tracking_assignments == | |
2302 | ; AUTODETECT_VALUE it will be set according to flag_var_tracking. | |
b5b8b0ac | 2303 | fvar-tracking-assignments |
e90afde6 | 2304 | Common Report Var(flag_var_tracking_assignments) Init(2) Optimization |
b5b8b0ac AO |
2305 | Perform variable tracking by annotating assignments |
2306 | ||
e90afde6 JM |
2307 | ; Nonzero if we should toggle flag_var_tracking_assignments after |
2308 | ; processing options and computing its default. */ | |
b5b8b0ac | 2309 | fvar-tracking-assignments-toggle |
e90afde6 | 2310 | Common Report Var(flag_var_tracking_assignments_toggle) Optimization |
b5b8b0ac AO |
2311 | Toggle -fvar-tracking-assignments |
2312 | ||
1267ca30 EB |
2313 | ; Positive if we should track uninitialized variables, negative if |
2314 | ; we should run the var-tracking pass only to discard debug | |
2315 | ; annotations. When flag_var_tracking_uninit == AUTODETECT_VALUE it | |
2316 | ; will be set according to flag_var_tracking. | |
62760ffd CT |
2317 | fvar-tracking-uninit |
2318 | Common Report Var(flag_var_tracking_uninit) Optimization | |
2319 | Perform variable tracking and also tag variables that are uninitialized | |
2320 | ||
79fe1b3b | 2321 | ftree-vectorize |
c662432e | 2322 | Common Report Var(flag_tree_vectorize) Optimization |
ea0f3e87 | 2323 | Enable vectorization on trees |
79fe1b3b | 2324 | |
78c60e3d | 2325 | ftree-vectorizer-verbose= |
477e804b SS |
2326 | Common Joined RejectNegative Ignore |
2327 | Does nothing. Preserved for backward compatibility. | |
78c60e3d | 2328 | |
ea0f3e87 XDL |
2329 | ftree-loop-vectorize |
2330 | Common Report Var(flag_tree_loop_vectorize) Optimization | |
2331 | Enable loop vectorization on trees | |
2332 | ||
a70d6342 | 2333 | ftree-slp-vectorize |
ea0f3e87 | 2334 | Common Report Var(flag_tree_slp_vectorize) Optimization |
a70d6342 IR |
2335 | Enable basic block vectorization (SLP) on trees |
2336 | ||
d6d11272 XDL |
2337 | fvect-cost-model= |
2338 | Common Joined RejectNegative Enum(vect_cost_model) Var(flag_vect_cost_model) Init(VECT_COST_MODEL_DEFAULT) | |
2339 | Specifies the cost model for vectorization | |
2340 | ||
8b5e1202 SO |
2341 | fsimd-cost-model= |
2342 | Common Joined RejectNegative Enum(vect_cost_model) Var(flag_simd_cost_model) Init(VECT_COST_MODEL_UNLIMITED) | |
2343 | Specifies the vectorization cost model for code marked with a simd directive | |
2344 | ||
d6d11272 XDL |
2345 | Enum |
2346 | Name(vect_cost_model) Type(enum vect_cost_model) UnknownError(unknown vectorizer cost model %qs) | |
2347 | ||
2348 | EnumValue | |
2349 | Enum(vect_cost_model) String(unlimited) Value(VECT_COST_MODEL_UNLIMITED) | |
2350 | ||
2351 | EnumValue | |
2352 | Enum(vect_cost_model) String(dynamic) Value(VECT_COST_MODEL_DYNAMIC) | |
2353 | ||
2354 | EnumValue | |
2355 | Enum(vect_cost_model) String(cheap) Value(VECT_COST_MODEL_CHEAP) | |
2356 | ||
792ed98b | 2357 | fvect-cost-model |
d6d11272 XDL |
2358 | Common RejectNegative Alias(fvect-cost-model=,dynamic) |
2359 | Enables the dynamic vectorizer cost model. Preserved for backward compatibility. | |
2360 | ||
2361 | fno-vect-cost-model | |
2362 | Common RejectNegative Alias(fvect-cost-model=,unlimited) | |
2363 | Enables the unlimited vectorizer cost model. Preserved for backward compatibility. | |
792ed98b | 2364 | |
c12cc930 | 2365 | ftree-vect-loop-version |
d6d11272 XDL |
2366 | Common Ignore |
2367 | Does nothing. Preserved for backward compatibility. | |
c12cc930 | 2368 | |
fbf798fc | 2369 | ftree-scev-cprop |
21af5cdf | 2370 | Common Report Var(flag_tree_scev_cprop) Init(1) Optimization |
fbf798fc DN |
2371 | Enable copy propagation of scalar-evolution information. |
2372 | ||
31b66477 KC |
2373 | ; -fverbose-asm causes extra commentary information to be produced in |
2374 | ; the generated assembly code (to make it more readable). This option | |
2375 | ; is generally only of use to those who actually need to read the | |
2376 | ; generated assembly code (perhaps while debugging the compiler itself). | |
2377 | ; -fno-verbose-asm, the default, causes the extra information | |
2378 | ; to not be added and is useful when comparing two assembler files. | |
6ff3a151 | 2379 | fverbose-asm |
50431bc4 | 2380 | Common Report Var(flag_verbose_asm) |
f3fdaec4 | 2381 | Add extra commentary to assembler output |
6ff3a151 | 2382 | |
d7afec4b | 2383 | fvisibility= |
e6d4b984 | 2384 | Common Joined RejectNegative Enum(symbol_visibility) Var(default_visibility) Init(VISIBILITY_DEFAULT) |
d7afec4b ND |
2385 | -fvisibility=[default|internal|hidden|protected] Set the default symbol visibility |
2386 | ||
e6d4b984 JM |
2387 | Enum |
2388 | Name(symbol_visibility) Type(enum symbol_visibility) UnknownError(unrecognized visibility value %qs) | |
2389 | ||
2390 | EnumValue | |
2391 | Enum(symbol_visibility) String(default) Value(VISIBILITY_DEFAULT) | |
2392 | ||
2393 | EnumValue | |
2394 | Enum(symbol_visibility) String(internal) Value(VISIBILITY_INTERNAL) | |
2395 | ||
2396 | EnumValue | |
2397 | Enum(symbol_visibility) String(hidden) Value(VISIBILITY_HIDDEN) | |
2398 | ||
2399 | EnumValue | |
2400 | Enum(symbol_visibility) String(protected) Value(VISIBILITY_PROTECTED) | |
d7afec4b | 2401 | |
2077db1b CT |
2402 | fvtable-verify= |
2403 | Common Joined RejectNegative Enum(vtv_priority) Var(flag_vtable_verify) Init(VTV_NO_PRIORITY) | |
2404 | Validate vtable pointers before using them. | |
2405 | ||
2406 | Enum | |
2407 | Name(vtv_priority) Type(enum vtv_priority) UnknownError(unknown vtable verify initialization priority %qs) | |
2408 | ||
2409 | EnumValue | |
2410 | Enum(vtv_priority) String(none) Value(VTV_NO_PRIORITY) | |
2411 | ||
2412 | EnumValue | |
2413 | Enum(vtv_priority) String(std) Value(VTV_STANDARD_PRIORITY) | |
2414 | ||
2415 | EnumValue | |
2416 | Enum(vtv_priority) String(preinit) Value(VTV_PREINIT_PRIORITY) | |
2417 | ||
2418 | fvtv-counts | |
2419 | Common Var(flag_vtv_counts) | |
2420 | Output vtable verification counters. | |
2421 | ||
2422 | fvtv-debug | |
2423 | Common Var(flag_vtv_debug) | |
2424 | Output vtable verification pointer sets information. | |
2425 | ||
fca9dc00 | 2426 | fvpt |
c662432e | 2427 | Common Report Var(flag_value_profile_transformations) Optimization |
fca9dc00 ZD |
2428 | Use expression value profiles in optimizations |
2429 | ||
62551c66 | 2430 | fweb |
c662432e | 2431 | Common Report Var(flag_web) Init(2) Optimization |
62551c66 JH |
2432 | Construct webs and split unrelated uses of single variable |
2433 | ||
c2699190 XDL |
2434 | ftree-builtin-call-dce |
2435 | Common Report Var(flag_tree_builtin_call_dce) Init(0) Optimization | |
2436 | Enable conditional dead code elimination for builtin calls | |
2437 | ||
ce91e74c | 2438 | fwhole-program |
c662432e | 2439 | Common Report Var(flag_whole_program) Init(0) Optimization |
ce91e74c JH |
2440 | Perform whole program optimizations |
2441 | ||
6ff3a151 | 2442 | fwrapv |
c662432e | 2443 | Common Report Var(flag_wrapv) Optimization |
f3fdaec4 | 2444 | Assume signed arithmetic overflow wraps around |
6ff3a151 | 2445 | |
6ff3a151 | 2446 | fzero-initialized-in-bss |
50431bc4 | 2447 | Common Report Var(flag_zero_initialized_in_bss) Init(1) |
f3fdaec4 | 2448 | Put zero initialized data in the bss section |
6ff3a151 | 2449 | |
e01cc6dc NB |
2450 | g |
2451 | Common JoinedOrMissing | |
df38ffef NB |
2452 | Generate debug information in default format |
2453 | ||
2454 | gcoff | |
6782438d | 2455 | Common JoinedOrMissing Negative(gdwarf) |
df38ffef NB |
2456 | Generate debug information in COFF format |
2457 | ||
6782438d SKS |
2458 | gdwarf |
2459 | Common JoinedOrMissing Negative(gdwarf-) | |
2460 | Generate debug information in default version of DWARF format | |
2461 | ||
53b2323e | 2462 | gdwarf- |
98095aa3 | 2463 | Common Joined UInteger Var(dwarf_version) Init(4) Negative(gstabs) |
53b2323e | 2464 | Generate debug information in DWARF v2 (or later) format |
df38ffef NB |
2465 | |
2466 | ggdb | |
2467 | Common JoinedOrMissing | |
2468 | Generate debug information in default extended format | |
2469 | ||
5175cbaf | 2470 | gno-pubnames |
7a1dd0fa | 2471 | Common Negative(gpubnames) Var(debug_generate_pub_sections, 0) Init(-1) |
5175cbaf SA |
2472 | Don't generate DWARF pubnames and pubtypes sections. |
2473 | ||
2474 | gpubnames | |
7a1dd0fa | 2475 | Common Negative(ggnu-pubnames) Var(debug_generate_pub_sections, 1) |
5175cbaf SA |
2476 | Generate DWARF pubnames and pubtypes sections. |
2477 | ||
7a1dd0fa SA |
2478 | ggnu-pubnames |
2479 | Common Negative(gno-pubnames) Var(debug_generate_pub_sections, 2) | |
2480 | Generate DWARF pubnames and pubtypes sections with GNU extensions. | |
2481 | ||
e967adf4 | 2482 | gno-record-gcc-switches |
98095aa3 | 2483 | Common RejectNegative Var(dwarf_record_gcc_switches,0) Init(1) |
e967adf4 JJ |
2484 | Don't record gcc command line switches in DWARF DW_AT_producer. |
2485 | ||
2486 | grecord-gcc-switches | |
2487 | Common RejectNegative Var(dwarf_record_gcc_switches,1) | |
2488 | Record gcc command line switches in DWARF DW_AT_producer. | |
2489 | ||
99ea153e SA |
2490 | gno-split-dwarf |
2491 | Common Driver RejectNegative Var(dwarf_split_debug_info,0) Init(0) | |
2492 | Don't generate debug information in separate .dwo files | |
2493 | ||
2494 | gsplit-dwarf | |
2495 | Common Driver RejectNegative Var(dwarf_split_debug_info,1) | |
2496 | Generate debug information in separate .dwo files | |
2497 | ||
df38ffef | 2498 | gstabs |
14c7833c | 2499 | Common JoinedOrMissing Negative(gstabs+) |
df38ffef NB |
2500 | Generate debug information in STABS format |
2501 | ||
2502 | gstabs+ | |
14c7833c | 2503 | Common JoinedOrMissing Negative(gvms) |
df38ffef NB |
2504 | Generate debug information in extended STABS format |
2505 | ||
65f753a0 | 2506 | gno-strict-dwarf |
98095aa3 | 2507 | Common RejectNegative Var(dwarf_strict,0) Init(0) |
65f753a0 JJ |
2508 | Emit DWARF additions beyond selected version |
2509 | ||
2510 | gstrict-dwarf | |
f0036cca | 2511 | Common Report RejectNegative Var(dwarf_strict,1) |
65f753a0 JJ |
2512 | Don't emit DWARF additions beyond selected version |
2513 | ||
2153915d AO |
2514 | gtoggle |
2515 | Common Report Var(flag_gtoggle) | |
2516 | Toggle debug information generation | |
2517 | ||
df38ffef | 2518 | gvms |
14c7833c | 2519 | Common JoinedOrMissing Negative(gxcoff) |
df38ffef NB |
2520 | Generate debug information in VMS format |
2521 | ||
2522 | gxcoff | |
14c7833c | 2523 | Common JoinedOrMissing Negative(gxcoff+) |
df38ffef NB |
2524 | Generate debug information in XCOFF format |
2525 | ||
2526 | gxcoff+ | |
14c7833c | 2527 | Common JoinedOrMissing Negative(gcoff) |
df38ffef | 2528 | Generate debug information in extended XCOFF format |
e01cc6dc | 2529 | |
29d7cbd1 RO |
2530 | Enum |
2531 | Name(compressed_debug_sections) Type(int) | |
2532 | ||
2533 | ; Since -gz= is completely handled in specs, the values aren't used and we | |
2534 | ; assign arbitrary constants. | |
2535 | EnumValue | |
2536 | Enum(compressed_debug_sections) String(none) Value(0) | |
2537 | ||
2538 | EnumValue | |
2539 | Enum(compressed_debug_sections) String(zlib) Value(1) | |
2540 | ||
2541 | EnumValue | |
2542 | Enum(compressed_debug_sections) String(zlib-gnu) Value(2) | |
2543 | ||
2544 | gz | |
2545 | Common Driver | |
2546 | Generate compressed debug sections | |
2547 | ||
2548 | gz= | |
2549 | Common Driver Joined Enum(compressed_debug_sections) | |
2550 | -gz=<format> Generate compressed debug sections in format <format> | |
2551 | ||
6d721f67 JM |
2552 | h |
2553 | Driver Joined Separate | |
2554 | ||
4adbd5dd MK |
2555 | iplugindir= |
2556 | Common Joined Var(plugindir_string) Init(0) | |
2557 | -iplugindir=<dir> Set <dir> to be the default plugin directory | |
2558 | ||
e0cdc09f MK |
2559 | imultiarch |
2560 | Common Joined Separate RejectDriver Var(imultiarch) Init(0) | |
2561 | -imultiarch <dir> Set <dir> to be the multiarch include subdirectory | |
2562 | ||
603349bf JM |
2563 | l |
2564 | Driver Joined Separate | |
2565 | ||
dd9f93dc JM |
2566 | n |
2567 | Driver | |
2568 | ||
603349bf JM |
2569 | no-canonical-prefixes |
2570 | Driver | |
2571 | ||
d9d16a19 JM |
2572 | nodefaultlibs |
2573 | Driver | |
2574 | ||
bab79a40 JM |
2575 | nostartfiles |
2576 | Driver | |
2577 | ||
d9d16a19 JM |
2578 | nostdlib |
2579 | Driver | |
2580 | ||
d185d268 | 2581 | o |
d5478783 | 2582 | Common Driver Joined Separate Var(asm_file_name) MissingArgError(missing filename after %qs) |
cf03fd63 | 2583 | -o <file> Place output into <file> |
d185d268 NB |
2584 | |
2585 | p | |
50431bc4 | 2586 | Common Var(profile_flag) |
cf03fd63 | 2587 | Enable function profiling |
d185d268 | 2588 | |
603349bf JM |
2589 | pass-exit-codes |
2590 | Driver Var(pass_exit_codes) | |
2591 | ||
d185d268 | 2592 | pedantic |
c1771a20 | 2593 | Common Alias(Wpedantic) |
d185d268 NB |
2594 | |
2595 | pedantic-errors | |
d5478783 | 2596 | Common Var(flag_pedantic_errors) |
cf03fd63 | 2597 | Like -pedantic but issue them as errors |
d185d268 | 2598 | |
d9d16a19 JM |
2599 | pg |
2600 | Driver | |
2601 | ||
603349bf JM |
2602 | pipe |
2603 | Driver Var(use_pipes) | |
2604 | ||
2605 | print-file-name= | |
2606 | Driver JoinedOrMissing Var(print_file_name) | |
2607 | ||
2608 | print-libgcc-file-name | |
2609 | Driver | |
2610 | ||
2611 | print-multi-directory | |
2612 | Driver Var(print_multi_directory) | |
2613 | ||
2614 | print-multi-lib | |
2615 | Driver Var(print_multi_lib) | |
2616 | ||
2617 | print-multi-os-directory | |
2618 | Driver Var(print_multi_os_directory) | |
e0cdc09f MK |
2619 | |
2620 | print-multiarch | |
2621 | Driver Var(print_multiarch) | |
603349bf JM |
2622 | |
2623 | print-prog-name= | |
2624 | Driver JoinedOrMissing Var(print_prog_name) | |
2625 | ||
2626 | print-search-dirs | |
2627 | Driver Var(print_search_dirs) | |
2628 | ||
2629 | print-sysroot | |
2630 | Driver Var(print_sysroot) | |
2631 | ||
2632 | print-sysroot-headers-suffix | |
2633 | Driver Var(print_sysroot_headers_suffix) | |
2634 | ||
d7b42618 | 2635 | quiet |
603349bf | 2636 | Common Var(quiet_flag) RejectDriver |
cf03fd63 | 2637 | Do not display functions compiled or elapsed time |
d7b42618 | 2638 | |
dd9f93dc JM |
2639 | r |
2640 | Driver | |
2641 | ||
2642 | s | |
2643 | Driver | |
2644 | ||
603349bf JM |
2645 | save-temps |
2646 | Driver | |
2647 | ||
2648 | save-temps= | |
2649 | Driver Joined | |
2650 | ||
dd9f93dc JM |
2651 | t |
2652 | Driver | |
2653 | ||
603349bf JM |
2654 | time |
2655 | Driver Var(report_times) | |
2656 | ||
2657 | time= | |
2658 | Driver JoinedOrMissing | |
2659 | ||
e200444e JM |
2660 | u |
2661 | Driver Joined Separate | |
2662 | ||
5642f5d5 JM |
2663 | undef |
2664 | Driver | |
2665 | ; C option, but driver must not handle as "-u ndef". | |
2666 | ||
603349bf | 2667 | v |
d5478783 JM |
2668 | Common Driver Var(verbose_flag) |
2669 | Enable verbose output | |
603349bf | 2670 | |
d185d268 | 2671 | version |
603349bf | 2672 | Common Var(version_flag) RejectDriver |
cf03fd63 | 2673 | Display the compiler's version |
d185d268 NB |
2674 | |
2675 | w | |
50431bc4 | 2676 | Common Var(inhibit_warnings) |
cf03fd63 | 2677 | Suppress warnings |
d185d268 | 2678 | |
603349bf JM |
2679 | wrapper |
2680 | Driver Separate Var(wrapper_string) | |
2681 | ||
2682 | x | |
2683 | Driver Joined Separate | |
2684 | ||
528dc603 | 2685 | shared |
5460e1fc | 2686 | Driver RejectNegative Negative(pie) |
528dc603 L |
2687 | Create a shared library |
2688 | ||
603349bf JM |
2689 | shared-libgcc |
2690 | Driver | |
2691 | ||
2692 | specs | |
5de8299c | 2693 | Driver Separate Alias(specs=) |
603349bf JM |
2694 | |
2695 | specs= | |
2696 | Driver Joined | |
2697 | ||
d9d16a19 JM |
2698 | static |
2699 | Driver | |
2700 | ||
603349bf JM |
2701 | static-libgcc |
2702 | Driver | |
2703 | ||
2704 | static-libgfortran | |
2705 | Driver | |
2706 | ; Documented for Fortran, but always accepted by driver. | |
2707 | ||
2708 | static-libstdc++ | |
2709 | Driver | |
2710 | ||
7a938933 ILT |
2711 | static-libgo |
2712 | Driver | |
2713 | ; Documented for Go, but always accepted by driver. | |
2714 | ||
7e8d1b2d L |
2715 | static-libasan |
2716 | Driver | |
2717 | ||
32b4b7f5 DV |
2718 | static-libtsan |
2719 | Driver | |
2720 | ||
9065ada9 JJ |
2721 | static-liblsan |
2722 | Driver | |
2723 | ||
de5a5fa1 MP |
2724 | static-libubsan |
2725 | Driver | |
2726 | ||
e200444e JM |
2727 | symbolic |
2728 | Driver | |
2729 | ||
528dc603 | 2730 | pie |
5460e1fc | 2731 | Driver RejectNegative Negative(shared) |
528dc603 L |
2732 | Create a position independent executable |
2733 | ||
6d721f67 JM |
2734 | z |
2735 | Driver Joined Separate | |
2736 | ||
d996e61a RO |
2737 | fuse-caller-save |
2738 | Common Report Var(flag_use_caller_save) Optimization | |
2739 | Use caller save register across calls if possible | |
2740 | ||
d7b42618 | 2741 | ; This comment is to ensure we retain the blank line above. |