gcc/common.opt

   1 ; Options for the language- and target-independent parts of the compiler.
   2 ; Copyright (C) 2003 Free Software Foundation, Inc.
   3 ;
   4 ; This file is part of GCC.
   5 ;
   6 ; GCC is free software; you can redistribute it and/or modify it under
   7 ; the terms of the GNU General Public License as published by the Free
   8 ; Software Foundation; either version 2, or (at your option) any later
   9 ; version.
  10 ;
  11 ; GCC is distributed in the hope that it will be useful, but WITHOUT ANY
  12 ; WARRANTY; without even the implied warranty of MERCHANTABILITY or
  13 ; FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  14 ; for more details.
  15 ;
  16 ; You should have received a copy of the GNU General Public License
  17 ; along with GCC; see the file COPYING.  If not, write to the Free
  18 ; Software Foundation, 59 Temple Place - Suite 330, Boston, MA
  19 ; 02111-1307, USA.
  20
  21 ; See c.opt for a description of this file's format.
  22
  23 ; Please try to keep this file in ASCII collating order.
  24
  25 -help
  26 Common
  27 Display this information
  28
  29 -param
  30 Common Separate
  31
  32 -target-help
  33 Common
  34
  35 -version
  36 Common
  37
  38 G
  39 Common Joined Separate UInteger
  40 -G<number>      Put global and static data smaller than <number> bytes into a special section (on some targets)
  41
  42 O
  43 Common JoinedOrMissing
  44 -O<number>      Set optimization level to <number>
  45
  46 Os
  47 Common
  48 Optimize for space rather than speed
  49
  50 W
  51 Common RejectNegative
  52 This switch is deprecated; use -Wextra instead
  53
  54 Waggregate-return
  55 Common
  56 Warn about returning structures, unions or arrays
  57
  58 Wcast-align
  59 Common
  60 Warn about pointer casts which increase alignment
  61
  62 Wdeprecated-declarations
  63 Common
  64 Warn about uses of __attribute__((deprecated)) declarations
  65
  66 Wdisabled-optimization
  67 Common
  68 Warn when an optimization pass is disabled
  69
  70 Werror
  71 Common
  72 Treat all warnings as errors
  73
  74 Wextra
  75 Common
  76 Print extra (possibly unwanted) warnings
  77
  78 Winline
  79 Common
  80 Warn when an inlined function cannot be inlined
  81
  82 Wlarger-than-
  83 Common RejectNegative Joined UInteger
  84 -Wlarger-than-<number>  Warn if an object is larger than <number> bytes
  85
  86 Wmissing-noreturn
  87 Common
  88 Warn about functions which might be candidates for __attribute__((noreturn))
  89
  90 Wpacked
  91 Common
  92 Warn when the packed attribute has no effect on struct layout
  93
  94 Wpadded
  95 Common
  96 Warn when padding is required to align structure members
  97
  98 Wshadow
  99 Common
 100 Warn when one local variable shadows another
 101
 102 Wstrict-aliasing
 103 Common
 104 Warn about code which might break strict aliasing rules
 105
 106 Wswitch
 107 Common
 108 Warn about enumerated switches, with no default, missing a case
 109
 110 Wswitch-default
 111 Common
 112 Warn about enumerated switches missing a \"default:\" statement
 113
 114 Wswitch-enum
 115 Common
 116 Warn about all enumerated switches missing a specific case
 117
 118 Wsystem-headers
 119 Common
 120 Suppress warnings from system headers
 121
 122 Wuninitialized
 123 Common
 124 Warn about uninitialized automatic variables
 125
 126 Wunreachable-code
 127 Common
 128 Warn about code that will never be executed
 129
 130 Wunused
 131 Common
 132 Enable all -Wunused- warnings
 133
 134 Wunused-function
 135 Common
 136 Warn when a function is unused
 137
 138 Wunused-label
 139 Common
 140 Warn when a label is unused
 141
 142 Wunused-parameter
 143 Common
 144 Warn when a function parameter is unused
 145
 146 Wunused-value
 147 Common
 148 Warn when an expression value is unused
 149
 150 Wunused-variable
 151 Common
 152 Warn when a variable is unused
 153
 154 aux-info
 155 Common Separate
 156 -aux-info <file>        Emit declaration information into <file>
 157
 158 aux-info=
 159 Common Joined
 160
 161 auxbase
 162 Common Separate
 163
 164 auxbase-strip
 165 Common Separate
 166
 167 d
 168 Common Joined
 169 -d<letters>     Enable dumps from specific passes of the compiler
 170
 171 dumpbase
 172 Common Separate
 173 -dumpbase <file>        Set the file basename to be used for dumps
 174
 175 fPIC
 176 Common
 177
 178 fPIE
 179 Common
 180
 181 falign-functions
 182 Common
 183
 184 falign-functions=
 185 Common RejectNegative Joined UInteger
 186
 187 falign-jumps
 188 Common
 189
 190 falign-jumps=
 191 Common RejectNegative Joined UInteger
 192
 193 falign-labels
 194 Common
 195
 196 falign-labels=
 197 Common RejectNegative Joined UInteger
 198
 199 falign-loops
 200 Common
 201
 202 falign-loops=
 203 Common RejectNegative Joined UInteger
 204
 205 fargument-alias
 206 Common
 207
 208 fargument-noalias
 209 Common
 210
 211 fargument-noalias-global
 212 Common
 213
 214 fasynchronous-unwind-tables
 215 Common
 216
 217 fbounds-check
 218 Common
 219
 220 fbranch-count-reg
 221 Common
 222
 223 fbranch-probabilities
 224 Common
 225
 226 fbranch-target-load-optimize
 227 Common
 228
 229 fbranch-target-load-optimize2
 230 Common
 231
 232 fcall-saved-
 233 Common Joined RejectNegative
 234 -fcall-saved-<register> Mark <register> as being preserved across functions
 235
 236 fcall-used-
 237 Common Joined RejectNegative
 238 -fcall-used-<register>  Mark <register> as being corrupted by function calls
 239
 240 fcaller-saves
 241 Common
 242
 243 fcommon
 244 Common
 245
 246 fcprop-registers
 247 Common
 248
 249 fcrossjumping
 250 Common
 251
 252 fcse-follow-jumps
 253 Common
 254
 255 fcse-skip-blocks
 256 Common
 257
 258 fdata-sections
 259 Common
 260
 261 fdefer-pop
 262 Common
 263
 264 fdelayed-branch
 265 Common
 266
 267 fdelete-null-pointer-checks
 268 Common
 269
 270 fdiagnostics-show-location=
 271 Common Joined RejectNegative
 272 -fdiagnostics-show-location=[once|every-line]   How often to emit source location at the beginning of line-wrapped diagnostics
 273
 274 fdump-unnumbered
 275 Common
 276
 277 feliminate-dwarf2-dups
 278 Common
 279
 280 feliminate-unused-debug-symbols
 281 Common
 282
 283 feliminate-unused-debug-types
 284 Common
 285
 286 fexceptions
 287 Common
 288
 289 fexpensive-optimizations
 290 Common
 291
 292 ffast-math
 293 Common
 294
 295 ffinite-math-only
 296 Common
 297
 298 ffixed-
 299 Common Joined RejectNegative
 300 -ffixed-<register>      Mark <register> as being unavailable to the compiler
 301
 302 ffloat-store
 303 Common
 304
 305 fforce-addr
 306 Common
 307
 308 fforce-mem
 309 Common
 310
 311 ffunction-cse
 312 Common
 313
 314 ffunction-sections
 315 Common
 316
 317 fgcse
 318 Common
 319
 320 fgcse-lm
 321 Common
 322
 323 fgcse-sm
 324 Common
 325
 326 fgnu-linker
 327 Common
 328
 329 fguess-branch-probability
 330 Common
 331
 332 fident
 333 Common
 334
 335 fif-conversion
 336 Common
 337
 338 fif-conversion2
 339 Common
 340
 341 finhibit-size-directive
 342 Common
 343
 344 finline
 345 Common
 346
 347 finline-functions
 348 Common
 349
 350 finline-limit-
 351 Common RejectNegative Joined UInteger
 352
 353 finline-limit=
 354 Common RejectNegative Joined UInteger
 355 -finline-limit=<number> Limit the size of inlined functions to <number>
 356
 357 finstrument-functions
 358 Common
 359
 360 fkeep-inline-functions
 361 Common
 362
 363 fkeep-static-consts
 364 Common
 365
 366 fleading-underscore
 367 Common
 368
 369 floop-optimize
 370 Common
 371
 372 fmath-errno
 373 Common
 374
 375 fmem-report
 376 Common
 377
 378 fmerge-all-constants
 379 Common
 380
 381 fmerge-constants
 382 Common
 383
 384 fmessage-length=
 385 Common RejectNegative Joined UInteger
 386 -fmessage-length=<number>       Limit diagnostics to <number> characters per line.  0 suppresses line-wrapping
 387
 388 fmove-all-movables
 389 Common
 390
 391 fnew-ra
 392 Common
 393
 394 fnon-call-exceptions
 395 Common
 396
 397 fold-unroll-loops
 398 Common
 399
 400 fold-unroll-all-loops
 401 Common
 402
 403 fomit-frame-pointer
 404 Common
 405
 406 foptimize-register-move
 407 Common
 408
 409 foptimize-sibling-calls
 410 Common
 411
 412 fpack-struct
 413 Common
 414
 415 fpcc-struct-return
 416 Common
 417
 418 fpeel-loops
 419 Common
 420
 421 fpeephole
 422 Common
 423
 424 fpeephole2
 425 Common
 426
 427 fpic
 428 Common
 429
 430 fpie
 431 Common
 432
 433 fprefetch-loop-arrays
 434 Common
 435
 436 fprofile
 437 Common
 438
 439 fprofile-arcs
 440 Common
 441
 442 frandom-seed
 443 Common
 444
 445 frandom-seed=
 446 Common Joined RejectNegative
 447 -frandom-seed=<string>  Make compile reproducible using <string>
 448
 449 freduce-all-givs
 450 Common
 451
 452 freg-struct-return
 453 Common
 454
 455 fregmove
 456 Common
 457
 458 frename-registers
 459 Common
 460
 461 freorder-blocks
 462 Common
 463
 464 freorder-functions
 465 Common
 466
 467 frerun-cse-after-loop
 468 Common
 469
 470 frerun-loop-opt
 471 Common
 472
 473 fsched-interblock
 474 Common
 475
 476 fsched-spec
 477 Common
 478
 479 fsched-spec-load
 480 Common
 481
 482 fsched-spec-load-dangerous
 483 Common
 484
 485 fsched-verbose=
 486 Common RejectNegative Joined
 487 -fsched-verbose=<number>        Set the verbosity level of the scheduler
 488
 489 fsched2-use-superblocks
 490 Common
 491
 492 fsched2-use-traces
 493 Common
 494
 495 fschedule-insns
 496 Common
 497
 498 fschedule-insns2
 499 Common
 500
 501 fshared-data
 502 Common
 503
 504 fsignaling-nans
 505 Common
 506
 507 fsingle-precision-constant
 508 Common
 509
 510 fssa
 511 Common
 512
 513 fssa-ccp
 514 Common
 515
 516 fssa-dce
 517 Common
 518
 519 fstack-check
 520 Common
 521
 522 fstack-limit
 523 Common
 524
 525 fstack-limit-register=
 526 Common RejectNegative Joined
 527 -fstack-limit-register=<register>       Trap if the stack goes past <register>
 528
 529 fstack-limit-symbol=
 530 Common RejectNegative Joined
 531 -fstack-limit-symbol=<name>     Trap if the stack goes past symbol <name>
 532
 533 fstrength-reduce
 534 Common
 535
 536 fstrict-aliasing
 537 Common
 538
 539 fsyntax-only
 540 Common
 541
 542 ftest-coverage
 543 Common
 544
 545 fthread-jumps
 546 Common
 547
 548 ftime-report
 549 Common
 550
 551 ftls-model=
 552 Common Joined RejectNegative
 553 -ftls-model=[global-dynamic|local-dynamic|initial-exec|local-exec]      Set the default thread-local storage code generation model
 554
 555 ftracer
 556 Common
 557
 558 ftrapping-math
 559 Common
 560
 561 ftrapv
 562 Common
 563
 564 funit-at-a-time
 565 Common
 566
 567 funroll-loops
 568 Common
 569
 570 funroll-all-loops
 571 Common
 572
 573 funsafe-math-optimizations
 574 Common
 575
 576 funswitch-loops
 577 Common
 578
 579 funwind-tables
 580 Common
 581
 582 fverbose-asm
 583 Common
 584
 585 fwrapv
 586 Common
 587
 588 fwritable-strings
 589 Common
 590
 591 fzero-initialized-in-bss
 592 Common
 593
 594 g
 595 Common JoinedOrMissing
 596
 597 m
 598 Common Joined
 599
 600 o
 601 Common Joined Separate
 602 -o <file>       Place output into <file>
 603
 604 p
 605 Common
 606 Enable function profiling
 607
 608 pedantic
 609 Common
 610 Issue warnings needed for strict compliance to the standard
 611
 612 pedantic-errors
 613 Common
 614 Like -pedantic but issue them as errors
 615
 616 quiet
 617 Common
 618 Do not display functions compiled or elapsed time
 619
 620 version
 621 Common
 622 Display the compiler's version
 623
 624 w
 625 Common
 626 Suppress warnings
 627
 628 ; This comment is to ensure we retain the blank line above.