gcc/common.opt

   1 ; Options for the language- and target-independent parts of the compiler.
   2
   3 ; Copyright (C) 2003-2014 Free Software Foundation, Inc.
   4 ;
   5 ; This file is part of GCC.
   6 ;
   7 ; GCC is free software; you can redistribute it and/or modify it under
   8 ; the terms of the GNU General Public License as published by the Free
   9 ; Software Foundation; either version 3, or (at your option) any later
  10 ; version.
  11 ;
  12 ; GCC is distributed in the hope that it will be useful, but WITHOUT ANY
  13 ; WARRANTY; without even the implied warranty of MERCHANTABILITY or
  14 ; FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  15 ; for more details.
  16 ;
  17 ; You should have received a copy of the GNU General Public License
  18 ; along with GCC; see the file COPYING3.  If not see
  19 ; <http://www.gnu.org/licenses/>.
  20
  21 ; See the GCC internals manual (options.texi) for a description of this file's format.
  22
  23 ; Please try to keep this file in ASCII collating order.
  24
  25 Variable
  26 int target_flags
  27
  28 Variable
  29 int optimize
  30
  31 Variable
  32 int optimize_size
  33
  34 Variable
  35 int optimize_debug
  36
  37 ; Not used directly to control optimizations, only to save -Ofast
  38 ; setting for "optimize" attributes.
  39 Variable
  40 int optimize_fast
  41
  42 ; True if this is the lto front end.  This is used to disable gimple
  43 ; generation and lowering passes that are normally run on the output
  44 ; of a front end.  These passes must be bypassed for lto since they
  45 ; have already been done before the gimple was written.
  46 Variable
  47 bool in_lto_p = false
  48
  49 ; 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
  59 ; Language specific warning pass for unused results.
  60 Variable
  61 bool flag_warn_unused_result = false
  62
  63 Variable
  64 int *param_values
  65
  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
  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
 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
 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
 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
 143 ; Type of stack check.
 144 Variable
 145 enum stack_check_type flag_stack_check = NO_STACK_CHECK
 146
 147 ; True if stack usage information needs to be computed.
 148 Variable
 149 bool flag_stack_usage_info = false
 150
 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
 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
 192 ; Which options have been printed by --help.
 193 Variable
 194 char *help_printed
 195
 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
 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
 210 ; What the sanitizer should instrument
 211 Variable
 212 unsigned int flag_sanitize
 213
 214 ; What sanitizers should recover from errors
 215 Variable
 216 unsigned int flag_sanitize_recover = SANITIZE_UNDEFINED | SANITIZE_NONDEFAULT | SANITIZE_KERNEL_ADDRESS
 217
 218 ; Flag whether a prefix has been added to dump_base_name
 219 Variable
 220 bool dump_base_name_prefixed = false
 221
 222 ###
 223 Driver
 224
 225 -assemble
 226 Driver Alias(S)
 227
 228 -compile
 229 Driver Alias(c)
 230
 231 -coverage
 232 Driver Alias(coverage)
 233
 234 -debug
 235 Common Alias(g)
 236
 237 -dump
 238 Common Separate Alias(d)
 239
 240 -dump=
 241 Common Joined Alias(d)
 242
 243 -dumpbase
 244 Common Separate Alias(dumpbase)
 245
 246 -dumpdir
 247 Common Separate Alias(dumpdir)
 248
 249 -entry
 250 Driver Separate Alias(e)
 251
 252 -entry=
 253 Driver Joined Alias(e)
 254
 255 -extra-warnings
 256 Common Warning Alias(Wextra)
 257
 258 -for-assembler
 259 Driver Separate Alias(Xassembler)
 260
 261 -for-assembler=
 262 Driver JoinedOrMissing Alias(Xassembler)
 263
 264 -for-linker
 265 Driver Separate Alias(Xlinker)
 266
 267 -for-linker=
 268 Driver JoinedOrMissing Alias(Xlinker)
 269
 270 -force-link
 271 Driver Separate Alias(u)
 272
 273 -force-link=
 274 Driver Joined Alias(u)
 275
 276 -help
 277 Common Driver Var(help_flag)
 278 Display this information
 279
 280 -help=
 281 Common Driver Report Joined
 282 --help=<class>  Display descriptions of a specific class of options.  <class> is one or more of optimizers, target, warnings, undocumented, params
 283
 284 -language
 285 Driver Separate Alias(x)
 286
 287 -language=
 288 Driver Joined Alias(x)
 289
 290 -library-directory
 291 Driver Separate Alias(L)
 292
 293 -library-directory=
 294 Driver Joined Alias(L)
 295
 296 -no-canonical-prefixes
 297 Driver Alias(no-canonical-prefixes)
 298
 299 -no-standard-libraries
 300 Driver Alias(nostdlib)
 301
 302 -no-sysroot-suffix
 303 Driver Var(no_sysroot_suffix)
 304
 305 -no-warnings
 306 Common Alias(w)
 307
 308 -optimize
 309 Common Alias(O)
 310
 311 -output
 312 Common Driver Separate Alias(o) MissingArgError(missing filename after %qs)
 313
 314 -output=
 315 Common Driver Joined Alias(o) MissingArgError(missing filename after %qs)
 316
 317 -pass-exit-codes
 318 Driver Alias(pass-exit-codes)
 319
 320 -pedantic
 321 Common Alias(Wpedantic)
 322
 323 -pedantic-errors
 324 Common Alias(pedantic-errors)
 325
 326 -pie
 327 Driver Alias(pie)
 328
 329 -pipe
 330 Driver Alias(pipe)
 331
 332 -prefix
 333 Driver Separate Alias(B)
 334
 335 -prefix=
 336 Driver JoinedOrMissing Alias(B)
 337
 338 -preprocess
 339 Driver Alias(E)
 340
 341 -print-file-name
 342 Driver Separate Alias(print-file-name=)
 343
 344 -print-file-name=
 345 Driver JoinedOrMissing Alias(print-file-name=)
 346
 347 -print-libgcc-file-name
 348 Driver Alias(print-libgcc-file-name)
 349
 350 -print-multi-directory
 351 Driver Alias(print-multi-directory)
 352
 353 -print-multi-lib
 354 Driver Alias(print-multi-lib)
 355
 356 -print-multi-os-directory
 357 Driver Alias(print-multi-os-directory)
 358
 359 -print-multiarch
 360 Driver Alias(print-multiarch)
 361
 362 -print-prog-name
 363 Driver Separate Alias(print-prog-name=)
 364
 365 -print-prog-name=
 366 Driver JoinedOrMissing Alias(print-prog-name=)
 367
 368 -print-search-dirs
 369 Driver Alias(print-search-dirs)
 370
 371 -print-sysroot
 372 Driver Alias(print-sysroot)
 373
 374 -print-sysroot-headers-suffix
 375 Driver Alias(print-sysroot-headers-suffix)
 376
 377 -profile
 378 Common Alias(p)
 379
 380 -save-temps
 381 Driver Alias(save-temps)
 382
 383 -shared
 384 Driver Alias(shared)
 385
 386 -specs
 387 Driver Separate Alias(specs=)
 388
 389 -specs=
 390 Driver Joined Alias(specs=)
 391
 392 -static
 393 Driver Alias(static)
 394
 395 -symbolic
 396 Driver Alias(symbolic)
 397
 398 -target-help
 399 Common Driver
 400 Alias for --help=target
 401
 402 -time
 403 Driver Alias(time)
 404
 405 -verbose
 406 Driver Alias(v)
 407
 408 ;; The driver used to convert options such as --help into forms such
 409 ;; as -fhelp; the following four entries are for compatibility with
 410 ;; any direct uses of those (undocumented) -f forms
 411 fhelp
 412 Common Driver Alias(-help)
 413
 414 fhelp=
 415 Common Driver Joined Alias(-help=)
 416
 417 ftarget-help
 418 Common Driver Alias(-target-help)
 419
 420 fversion
 421 Common Driver Alias(-version)
 422
 423 -param
 424 Common Separate
 425 --param <param>=<value> Set parameter <param> to value.  See below for a complete list of parameters
 426
 427 -param=
 428 Common Joined Alias(-param)
 429
 430 -sysroot
 431 Driver Separate Alias(-sysroot=)
 432
 433 -sysroot=
 434 Driver JoinedOrMissing
 435
 436 -version
 437 Common Driver
 438
 439 B
 440 Driver Joined Separate
 441
 442 E
 443 Driver
 444
 445 L
 446 Driver Joined Separate
 447
 448 N
 449 Driver
 450
 451 O
 452 Common JoinedOrMissing Optimization
 453 -O<number>      Set optimization level to <number>
 454
 455 Os
 456 Common Optimization
 457 Optimize for space rather than speed
 458
 459 Ofast
 460 Common Optimization
 461 Optimize for speed disregarding exact standards compliance
 462
 463 Og
 464 Common Optimization
 465 Optimize for debugging experience rather than speed or size
 466
 467 Q
 468 Driver
 469
 470 Qn
 471 Driver Negative(Qy)
 472
 473 Qy
 474 Driver Negative(Qn)
 475
 476 R
 477 Driver Joined Separate
 478
 479 S
 480 Driver
 481
 482 T
 483 Driver Joined Separate
 484
 485 Tbss
 486 Driver Separate
 487
 488 Tbss=
 489 Driver Joined
 490
 491 Tdata
 492 Driver Separate
 493
 494 Tdata=
 495 Driver Joined
 496
 497 Ttext
 498 Driver Separate
 499
 500 Ttext=
 501 Driver Joined
 502
 503 W
 504 Common RejectNegative Warning Alias(Wextra)
 505 This switch is deprecated; use -Wextra instead
 506
 507 Wa,
 508 Driver JoinedOrMissing
 509
 510 Wl,
 511 Driver JoinedOrMissing
 512
 513 Wp,
 514 Driver JoinedOrMissing
 515
 516 Waggregate-return
 517 Common Var(warn_aggregate_return) Warning
 518 Warn about returning structures, unions or arrays
 519
 520 Waggressive-loop-optimizations
 521 Common Var(warn_aggressive_loop_optimizations) Init(1) Warning
 522 Warn if a loop with constant number of iterations triggers undefined behavior
 523
 524 Warray-bounds
 525 Common Var(warn_array_bounds) Warning
 526 Warn if an array is accessed out of bounds
 527
 528 Wattributes
 529 Common Var(warn_attributes) Init(1) Warning
 530 Warn about inappropriate attribute usage
 531
 532 Wcast-align
 533 Common Var(warn_cast_align) Warning
 534 Warn about pointer casts which increase alignment
 535
 536 Wcpp
 537 Common Var(warn_cpp) Init(1) Warning
 538 Warn when a #warning directive is encountered
 539
 540 Wdeprecated-declarations
 541 Common Var(warn_deprecated_decl) Init(1) Warning
 542 Warn about uses of __attribute__((deprecated)) declarations
 543
 544 Wdisabled-optimization
 545 Common Var(warn_disabled_optimization) Warning
 546 Warn when an optimization pass is disabled
 547
 548 Werror
 549 Common Var(warnings_are_errors)
 550 Treat all warnings as errors
 551
 552 Werror=
 553 Common Joined
 554 Treat specified warning as error
 555
 556 Wextra
 557 Common Var(extra_warnings) Warning
 558 Print extra (possibly unwanted) warnings
 559
 560 Wfatal-errors
 561 Common Var(flag_fatal_errors)
 562 Exit on the first error occurred
 563
 564 Wframe-larger-than=
 565 Common RejectNegative Joined UInteger
 566 -Wframe-larger-than=<number>    Warn if a function's stack frame requires more than <number> bytes
 567
 568 Wfree-nonheap-object
 569 Common Var(warn_free_nonheap_object) Init(1) Warning
 570 Warn when attempting to free a non-heap object
 571
 572 Winline
 573 Common Var(warn_inline) Warning
 574 Warn when an inlined function cannot be inlined
 575
 576 Winvalid-memory-model
 577 Common Var(warn_invalid_memory_model) Init(1) Warning
 578 Warn when an atomic memory model parameter is known to be outside the valid range.
 579
 580 Wlarger-than-
 581 Common RejectNegative Joined Warning Undocumented Alias(Wlarger-than=)
 582
 583 Wlarger-than=
 584 Common RejectNegative Joined UInteger Warning
 585 -Wlarger-than=<number>  Warn if an object is larger than <number> bytes
 586
 587 Wunsafe-loop-optimizations
 588 Common Var(warn_unsafe_loop_optimizations) Warning
 589 Warn if the loop cannot be optimized due to nontrivial assumptions.
 590
 591 Wmissing-noreturn
 592 Common Alias(Wsuggest-attribute=noreturn)
 593
 594 Wodr
 595 Common Var(warn_odr_violations) Init(1) Warning
 596 Warn about some C++ One Definition Rule violations during link time optimization
 597
 598 Woverflow
 599 Common Var(warn_overflow) Init(1) Warning
 600 Warn about overflow in arithmetic expressions
 601
 602 Wpacked
 603 Common Var(warn_packed) Warning
 604 Warn when the packed attribute has no effect on struct layout
 605
 606 Wpadded
 607 Common Var(warn_padded) Warning
 608 Warn when padding is required to align structure members
 609
 610 Wpedantic
 611 Common Var(pedantic) Init(0) Warning
 612 Issue warnings needed for strict compliance to the standard
 613
 614 Wreturn-local-addr
 615 Common Var(warn_return_local_addr) Init(1) Warning
 616 Warn about returning a pointer/reference to a local or temporary variable.
 617
 618 Wshadow
 619 Common Var(warn_shadow) Warning
 620 Warn when one local variable shadows another
 621
 622 Wstack-protector
 623 Common Var(warn_stack_protect) Warning
 624 Warn when not issuing stack smashing protection for some reason
 625
 626 Wstack-usage=
 627 Common Joined RejectNegative UInteger Var(warn_stack_usage) Init(-1) Warning
 628 Warn if stack usage might be larger than specified amount
 629
 630 Wstrict-aliasing
 631 Common Warning
 632 Warn about code which might break strict aliasing rules
 633
 634 Wstrict-aliasing=
 635 Common Joined RejectNegative UInteger Var(warn_strict_aliasing) Warning
 636 Warn about code which might break strict aliasing rules
 637
 638 Wstrict-overflow
 639 Common Warning
 640 Warn about optimizations that assume that signed overflow is undefined
 641
 642 Wstrict-overflow=
 643 Common Joined RejectNegative UInteger Var(warn_strict_overflow) Warning
 644 Warn about optimizations that assume that signed overflow is undefined
 645
 646 Wsuggest-attribute=const
 647 Common Var(warn_suggest_attribute_const) Warning
 648 Warn about functions which might be candidates for __attribute__((const))
 649
 650 Wsuggest-attribute=pure
 651 Common Var(warn_suggest_attribute_pure) Warning
 652 Warn about functions which might be candidates for __attribute__((pure))
 653
 654 Wsuggest-attribute=noreturn
 655 Common Var(warn_suggest_attribute_noreturn) Warning
 656 Warn about functions which might be candidates for __attribute__((noreturn))
 657
 658 Wsuggest-final-types
 659 Common Var(warn_suggest_final_types) Warning
 660 Warn about C++ polymorphic types where adding final keyword would improve code quality
 661
 662 Wsuggest-final-methods
 663 Common Var(warn_suggest_final_methods) Warning
 664 Warn about C++ virtual methods where adding final keyword would improve code quality
 665
 666 Wsystem-headers
 667 Common Var(warn_system_headers) Warning
 668 Do not suppress warnings from system headers
 669
 670 Wtrampolines
 671 Common Var(warn_trampolines) Warning
 672 Warn whenever a trampoline is generated
 673
 674 Wtype-limits
 675 Common Var(warn_type_limits) Warning EnabledBy(Wextra)
 676 Warn if a comparison is always true or always false due to the limited range of the data type
 677
 678 Wuninitialized
 679 Common Var(warn_uninitialized) Warning EnabledBy(Wextra)
 680 Warn about uninitialized automatic variables
 681
 682 Wmaybe-uninitialized
 683 Common Var(warn_maybe_uninitialized) Warning EnabledBy(Wuninitialized)
 684 Warn about maybe uninitialized automatic variables
 685
 686 Wunreachable-code
 687 Common Ignore
 688 Does nothing. Preserved for backward compatibility.
 689
 690 Wunused
 691 Common Var(warn_unused) Init(0) Warning
 692 Enable all -Wunused- warnings
 693
 694 Wunused-but-set-parameter
 695 Common Var(warn_unused_but_set_parameter) Warning EnabledBy(Wunused && Wextra)
 696 Warn when a function parameter is only set, otherwise unused
 697
 698 Wunused-but-set-variable
 699 Common Var(warn_unused_but_set_variable) Warning EnabledBy(Wunused)
 700 Warn when a variable is only set, otherwise unused
 701
 702 Wunused-function
 703 Common Var(warn_unused_function) Warning EnabledBy(Wunused)
 704 Warn when a function is unused
 705
 706 Wunused-label
 707 Common Var(warn_unused_label) Warning EnabledBy(Wunused)
 708 Warn when a label is unused
 709
 710 Wunused-parameter
 711 Common Var(warn_unused_parameter) Warning EnabledBy(Wunused && Wextra)
 712 Warn when a function parameter is unused
 713
 714 Wunused-value
 715 Common Var(warn_unused_value) Warning EnabledBy(Wunused)
 716 Warn when an expression value is unused
 717
 718 Wunused-variable
 719 Common Var(warn_unused_variable) Warning EnabledBy(Wunused)
 720 Warn when a variable is unused
 721
 722 Wcoverage-mismatch
 723 Common Var(warn_coverage_mismatch) Init(1) Warning
 724 Warn in case profiles in -fprofile-use do not match
 725
 726 Wvector-operation-performance
 727 Common Var(warn_vector_operation_performance) Warning
 728 Warn when a vector operation is compiled outside the SIMD
 729
 730 Xassembler
 731 Driver Separate
 732
 733 Xlinker
 734 Driver Separate
 735
 736 Xpreprocessor
 737 Driver Separate
 738
 739 Z
 740 Driver
 741
 742 aux-info
 743 Common Separate Var(aux_info_file_name)
 744 -aux-info <file>        Emit declaration information into <file>
 745
 746 aux-info=
 747 Common Joined Alias(aux-info)
 748
 749 auxbase
 750 Common Separate RejectDriver Var(aux_base_name)
 751
 752 auxbase-strip
 753 Common Separate RejectDriver
 754
 755 coverage
 756 Driver
 757
 758 c
 759 Driver
 760
 761 d
 762 Common Joined
 763 -d<letters>     Enable dumps from specific passes of the compiler
 764
 765 dumpbase
 766 Common Separate Var(dump_base_name)
 767 -dumpbase <file>        Set the file basename to be used for dumps
 768
 769 dumpdir
 770 Common Separate Var(dump_dir_name)
 771 -dumpdir <dir>  Set the directory name to be used for dumps
 772
 773 dumpmachine
 774 Driver
 775
 776 dumpspecs
 777 Driver
 778
 779 dumpversion
 780 Driver
 781
 782 e
 783 Driver Joined Separate
 784
 785 ; This option has historically been passed down to the linker by an
 786 ; accident of a %{e*} spec, so ensure it continues to be passed down
 787 ; as a single option.  The supported option for this purpose is
 788 ; -rdynamic.  See PR 47390.
 789 export-dynamic
 790 Driver Undocumented
 791
 792 ; The version of the C++ ABI in use.  The following values are allowed:
 793 ;
 794 ; 0: The version of the ABI believed most conformant with the C++ ABI
 795 ;    specification.  This ABI may change as bugs are discovered and fixed.
 796 ;    Therefore, 0 will not necessarily indicate the same ABI in different
 797 ;    versions of G++.
 798 ;
 799 ; 1: The version of the ABI first used in G++ 3.2.  No longer selectable.
 800 ;
 801 ; 2: The version of the ABI first used in G++ 3.4 (and current default).
 802 ;
 803 ; 3: The version of the ABI that fixes the missing underscore
 804 ;    in template non-type arguments of pointer type.
 805 ;
 806 ; 4: The version of the ABI that introduces unambiguous mangling of
 807 ;    vector types.  First selectable in G++ 4.5.
 808 ;
 809 ; 5: The version of the ABI that ignores attribute const/noreturn
 810 ;    in function pointer mangling, and corrects mangling of decltype and
 811 ;    function parameters used in other parameters and the return type.
 812 ;    First selectable in G++ 4.6.
 813 ;
 814 ; 6: The version of the ABI that doesn't promote scoped enums to int and
 815 ;    changes the mangling of template argument packs, const/static_cast,
 816 ;    prefix ++ and --, and a class scope function used as a template
 817 ;    argument.
 818 ;    First selectable in G++ 4.7.
 819 ;
 820 ; 7: The version of the ABI that treats nullptr_t as a builtin type and
 821 ;    corrects the mangling of lambdas in default argument scope.
 822 ;    First selectable in G++ 4.8.
 823 ;
 824 ; 8: The version of the ABI that corrects the substitution behavior of
 825 ;    function types with function-cv-qualifiers.
 826 ;    First selectable in G++ 4.9.
 827 ;
 828 ; Additional positive integers will be assigned as new versions of
 829 ; the ABI become the default version of the ABI.
 830 fabi-version=
 831 Common Joined RejectNegative UInteger Var(flag_abi_version) Init(0)
 832 The version of the C++ ABI in use
 833
 834 faggressive-loop-optimizations
 835 Common Report Var(flag_aggressive_loop_optimizations) Optimization Init(1)
 836 Aggressively optimize loops using language constraints
 837
 838 falign-functions
 839 Common Report Var(align_functions,0) Optimization UInteger
 840 Align the start of functions
 841
 842 falign-functions=
 843 Common RejectNegative Joined UInteger Var(align_functions)
 844
 845 falign-jumps
 846 Common Report Var(align_jumps,0) Optimization UInteger
 847 Align labels which are only reached by jumping
 848
 849 falign-jumps=
 850 Common RejectNegative Joined UInteger Var(align_jumps)
 851
 852 falign-labels
 853 Common Report Var(align_labels,0) Optimization UInteger
 854 Align all labels
 855
 856 falign-labels=
 857 Common RejectNegative Joined UInteger Var(align_labels)
 858
 859 falign-loops
 860 Common Report Var(align_loops,0) Optimization UInteger
 861 Align the start of loops
 862
 863 falign-loops=
 864 Common RejectNegative Joined UInteger Var(align_loops)
 865
 866 fargument-alias
 867 Common Ignore
 868 Does nothing. Preserved for backward compatibility.
 869
 870 fargument-noalias
 871 Common Ignore
 872 Does nothing. Preserved for backward compatibility.
 873
 874 fargument-noalias-global
 875 Common Ignore
 876 Does nothing. Preserved for backward compatibility.
 877
 878 fargument-noalias-anything
 879 Common Ignore
 880 Does nothing. Preserved for backward compatibility.
 881
 882 fsanitize=
 883 Common Driver Report Joined
 884 Select what to sanitize
 885
 886 fasan-shadow-offset=
 887 Common Joined RejectNegative Var(common_deferred_options) Defer
 888 -fasan-shadow-offset=<number>   Use custom shadow memory offset.
 889
 890 fsanitize-recover=
 891 Common Report Joined
 892 After diagnosing undefined behavior attempt to continue execution
 893
 894 fsanitize-recover
 895 Common Report
 896 This switch is deprecated; use -fsanitize-recover= instead
 897
 898 fsanitize-undefined-trap-on-error
 899 Common Report Var(flag_sanitize_undefined_trap_on_error) Init(0)
 900 Use trap instead of a library function for undefined behavior sanitization
 901
 902 fasynchronous-unwind-tables
 903 Common Report Var(flag_asynchronous_unwind_tables) Optimization
 904 Generate unwind tables that are exact at each instruction boundary
 905
 906 fauto-inc-dec
 907 Common Report Var(flag_auto_inc_dec) Init(1)
 908 Generate auto-inc/dec instructions
 909
 910 fauto-profile
 911 Common Report Var(flag_auto_profile) Optimization
 912 Use sample profile information for call graph node weights. The default
 913 profile file is fbdata.afdo in 'pwd'.
 914
 915 fauto-profile=
 916 Common Joined RejectNegative Var(auto_profile_file)
 917 Use sample profile information for call graph node weights. The profile
 918 file is specified in the argument.
 919
 920 ; -fcheck-bounds causes gcc to generate array bounds checks.
 921 ; For C, C++ and ObjC: defaults off.
 922 ; For Java: defaults to on.
 923 ; For Fortran: defaults to off.
 924 fbounds-check
 925 Common Report Var(flag_bounds_check)
 926 Generate code to check bounds before indexing arrays
 927
 928 fbranch-count-reg
 929 Common Report Var(flag_branch_on_count_reg) Optimization
 930 Replace add, compare, branch with branch on count register
 931
 932 fbranch-probabilities
 933 Common Report Var(flag_branch_probabilities) Optimization
 934 Use profiling information for branch probabilities
 935
 936 fbranch-target-load-optimize
 937 Common Report Var(flag_branch_target_load_optimize) Optimization
 938 Perform branch target load optimization before prologue / epilogue threading
 939
 940 fbranch-target-load-optimize2
 941 Common Report Var(flag_branch_target_load_optimize2) Optimization
 942 Perform branch target load optimization after prologue / epilogue threading
 943
 944 fbtr-bb-exclusive
 945 Common Report Var(flag_btr_bb_exclusive) Optimization
 946 Restrict target load migration not to re-use registers in any basic block
 947
 948 fcall-saved-
 949 Common Joined RejectNegative Var(common_deferred_options) Defer
 950 -fcall-saved-<register> Mark <register> as being preserved across functions
 951
 952 fcall-used-
 953 Common Joined RejectNegative Var(common_deferred_options) Defer
 954 -fcall-used-<register>  Mark <register> as being corrupted by function calls
 955
 956 ; Nonzero for -fcaller-saves: allocate values in regs that need to
 957 ; be saved across function calls, if that produces overall better code.
 958 ; Optional now, so people can test it.
 959 fcaller-saves
 960 Common Report Var(flag_caller_saves) Optimization
 961 Save registers around function calls
 962
 963 fcheck-data-deps
 964 Common Report Var(flag_check_data_deps)
 965 Compare the results of several data dependence analyzers.
 966
 967 fcheck-new
 968 Common Var(flag_check_new)
 969 Check the return value of new in C++
 970
 971 fcombine-stack-adjustments
 972 Common Report Var(flag_combine_stack_adjustments) Optimization
 973 Looks for opportunities to reduce stack adjustments and stack references.
 974
 975 fcommon
 976 Common Report Var(flag_no_common,0) Optimization
 977 Do not put uninitialized globals in the common section
 978
 979 fcompare-debug
 980 Driver
 981 ; Converted by the driver to -fcompare-debug= options.
 982
 983 fcompare-debug=
 984 Common Driver JoinedOrMissing RejectNegative Var(flag_compare_debug_opt)
 985 -fcompare-debug[=<opts>]        Compile with and without e.g. -gtoggle, and compare the final-insns dump
 986
 987 fcompare-debug-second
 988 Common Driver RejectNegative Var(flag_compare_debug)
 989 Run only the second compilation of -fcompare-debug
 990
 991 fcompare-elim
 992 Common Report Var(flag_compare_elim_after_reload) Optimization
 993 Perform comparison elimination after register allocation has finished
 994
 995 fconserve-stack
 996 Common Var(flag_conserve_stack) Optimization
 997 Do not perform optimizations increasing noticeably stack usage
 998
 999 fcprop-registers
1000 Common Report Var(flag_cprop_registers) Optimization
1001 Perform a register copy-propagation optimization pass
1002
1003 fcrossjumping
1004 Common Report Var(flag_crossjumping) Optimization
1005 Perform cross-jumping optimization
1006
1007 fcse-follow-jumps
1008 Common Report Var(flag_cse_follow_jumps) Optimization
1009 When running CSE, follow jumps to their targets
1010
1011 fcse-skip-blocks
1012 Common Ignore
1013 Does nothing.  Preserved for backward compatibility.
1014
1015 fcx-limited-range
1016 Common Report Var(flag_cx_limited_range) Optimization SetByCombined
1017 Omit range reduction step when performing complex division
1018
1019 fcx-fortran-rules
1020 Common Report Var(flag_cx_fortran_rules) Optimization
1021 Complex multiplication and division follow Fortran rules
1022
1023 fdata-sections
1024 Common Report Var(flag_data_sections) Optimization
1025 Place data items into their own section
1026
1027 fdbg-cnt-list
1028 Common Report Var(common_deferred_options) Defer
1029 List all available debugging counters with their limits and counts.
1030
1031 fdbg-cnt=
1032 Common RejectNegative Joined Var(common_deferred_options) Defer
1033 -fdbg-cnt=<counter>:<limit>[,<counter>:<limit>,...]     Set the debug counter limit.
1034
1035 fdebug-prefix-map=
1036 Common Joined RejectNegative Var(common_deferred_options) Defer
1037 Map one directory name to another in debug information
1038
1039 fdebug-types-section
1040 Common Report Var(flag_debug_types_section) Init(0)
1041 Output .debug_types section when using DWARF v4 debuginfo.
1042
1043 ; Nonzero for -fdefer-pop: don't pop args after each function call
1044 ; instead save them up to pop many calls' args with one insns.
1045 fdefer-pop
1046 Common Report Var(flag_defer_pop) Optimization
1047 Defer popping functions args from stack until later
1048
1049 fdelayed-branch
1050 Common Report Var(flag_delayed_branch) Optimization
1051 Attempt to fill delay slots of branch instructions
1052
1053 fdelete-dead-exceptions
1054 Common Report Var(flag_delete_dead_exceptions) Init(0)
1055 Delete dead instructions that may throw exceptions
1056
1057 fdelete-null-pointer-checks
1058 Common Report Var(flag_delete_null_pointer_checks) Init(1) Optimization
1059 Delete useless null pointer checks
1060
1061 fdevirtualize-speculatively
1062 Common Report Var(flag_devirtualize_speculatively) Optimization
1063 Perform speculative devirtualization
1064
1065 fdevirtualize
1066 Common Report Var(flag_devirtualize) Optimization
1067 Try to convert virtual calls to direct ones.
1068
1069 fdiagnostics-show-location=
1070 Common Joined RejectNegative Enum(diagnostic_prefixing_rule)
1071 -fdiagnostics-show-location=[once|every-line]   How often to emit source location at the beginning of line-wrapped diagnostics
1072
1073 ; Required for these enum values.
1074 SourceInclude
1075 pretty-print.h
1076
1077 Enum
1078 Name(diagnostic_prefixing_rule) Type(int)
1079
1080 EnumValue
1081 Enum(diagnostic_prefixing_rule) String(once) Value(DIAGNOSTICS_SHOW_PREFIX_ONCE)
1082
1083 EnumValue
1084 Enum(diagnostic_prefixing_rule) String(every-line) Value(DIAGNOSTICS_SHOW_PREFIX_EVERY_LINE)
1085
1086 fdiagnostics-show-caret
1087 Common Var(flag_diagnostics_show_caret) Init(1)
1088 Show the source line with a caret indicating the column
1089
1090 fdiagnostics-color
1091 Common Alias(fdiagnostics-color=,always,never)
1092 ;
1093
1094 fdiagnostics-color=
1095 Common Joined RejectNegative Var(flag_diagnostics_show_color) Enum(diagnostic_color_rule) Init(DIAGNOSTICS_COLOR_NO)
1096 -fdiagnostics-color=[never|always|auto] Colorize diagnostics
1097
1098 ; Required for these enum values.
1099 SourceInclude
1100 diagnostic-color.h
1101
1102 Enum
1103 Name(diagnostic_color_rule) Type(int)
1104
1105 EnumValue
1106 Enum(diagnostic_color_rule) String(never) Value(DIAGNOSTICS_COLOR_NO)
1107
1108 EnumValue
1109 Enum(diagnostic_color_rule) String(always) Value(DIAGNOSTICS_COLOR_YES)
1110
1111 EnumValue
1112 Enum(diagnostic_color_rule) String(auto) Value(DIAGNOSTICS_COLOR_AUTO)
1113
1114 fdiagnostics-show-option
1115 Common Var(flag_diagnostics_show_option) Init(1)
1116 Amend appropriate diagnostic messages with the command line option that controls them
1117
1118 fdisable-
1119 Common Joined RejectNegative Var(common_deferred_options) Defer
1120 -fdisable-[tree|rtl|ipa]-<pass>=range1+range2 disables an optimization pass
1121
1122 fenable-
1123 Common Joined RejectNegative Var(common_deferred_options) Defer
1124 -fenable-[tree|rtl|ipa]-<pass>=range1+range2 enables an optimization pass
1125
1126 fdump-
1127 Common Joined RejectNegative Var(common_deferred_options) Defer
1128 -fdump-<type>   Dump various compiler internals to a file
1129
1130 fdump-final-insns
1131 Driver RejectNegative
1132
1133 fdump-final-insns=
1134 Common RejectNegative Joined Var(flag_dump_final_insns)
1135 -fdump-final-insns=filename     Dump to filename the insns at the end of translation
1136
1137 fdump-go-spec=
1138 Common RejectNegative Joined Var(flag_dump_go_spec)
1139 -fdump-go-spec=filename Write all declarations to file as Go code
1140
1141 fdump-noaddr
1142 Common Report Var(flag_dump_noaddr)
1143 Suppress output of addresses in debugging dumps
1144
1145 freport-bug
1146 Common Driver Var(flag_report_bug)
1147 Collect and dump debug information into temporary file if ICE in C/C++
1148 compiler occured.
1149
1150 fdump-passes
1151 Common Var(flag_dump_passes) Init(0)
1152 Dump optimization passes
1153
1154 fdump-unnumbered
1155 Common Report Var(flag_dump_unnumbered)
1156 Suppress output of instruction numbers, line number notes and addresses in debugging dumps
1157
1158 fdump-unnumbered-links
1159 Common Report Var(flag_dump_unnumbered_links)
1160 Suppress output of previous and next insn numbers in debugging dumps
1161
1162 fdwarf2-cfi-asm
1163 Common Report Var(flag_dwarf2_cfi_asm) Init(HAVE_GAS_CFI_DIRECTIVE)
1164 Enable CFI tables via GAS assembler directives.
1165
1166 fearly-inlining
1167 Common Report Var(flag_early_inlining) Init(1) Optimization
1168 Perform early inlining
1169
1170 feliminate-dwarf2-dups
1171 Common Report Var(flag_eliminate_dwarf2_dups)
1172 Perform DWARF2 duplicate elimination
1173
1174 fipa-sra
1175 Common Report Var(flag_ipa_sra) Init(0) Optimization
1176 Perform interprocedural reduction of aggregates
1177
1178 feliminate-unused-debug-symbols
1179 Common Report Var(flag_debug_only_used_symbols)
1180 Perform unused type elimination in debug info
1181
1182 feliminate-unused-debug-types
1183 Common Report Var(flag_eliminate_unused_debug_types) Init(1)
1184 Perform unused type elimination in debug info
1185
1186 femit-class-debug-always
1187 Common Report Var(flag_emit_class_debug_always) Init(0)
1188 Do not suppress C++ class debug information.
1189
1190 fexceptions
1191 Common Report Var(flag_exceptions) Optimization
1192 Enable exception handling
1193
1194 fexpensive-optimizations
1195 Common Report Var(flag_expensive_optimizations) Optimization
1196 Perform a number of minor, expensive optimizations
1197
1198 fexcess-precision=
1199 Common Joined RejectNegative Enum(excess_precision) Var(flag_excess_precision_cmdline) Init(EXCESS_PRECISION_DEFAULT)
1200 -fexcess-precision=[fast|standard]      Specify handling of excess floating-point precision
1201
1202 Enum
1203 Name(excess_precision) Type(enum excess_precision) UnknownError(unknown excess precision style %qs)
1204
1205 EnumValue
1206 Enum(excess_precision) String(fast) Value(EXCESS_PRECISION_FAST)
1207
1208 EnumValue
1209 Enum(excess_precision) String(standard) Value(EXCESS_PRECISION_STANDARD)
1210
1211 ffast-math
1212 Common
1213
1214 ffat-lto-objects
1215 Common Var(flag_fat_lto_objects)
1216 Output lto objects containing both the intermediate language and binary output.
1217
1218 ffinite-math-only
1219 Common Report Var(flag_finite_math_only) Optimization SetByCombined
1220 Assume no NaNs or infinities are generated
1221
1222 ffixed-
1223 Common Joined RejectNegative Var(common_deferred_options) Defer
1224 -ffixed-<register>      Mark <register> as being unavailable to the compiler
1225
1226 ffloat-store
1227 Common Report Var(flag_float_store) Optimization
1228 Don't allocate floats and doubles in extended-precision registers
1229
1230 fforce-addr
1231 Common Ignore
1232 Does nothing.  Preserved for backward compatibility.
1233
1234 fforward-propagate
1235 Common Report Var(flag_forward_propagate) Optimization
1236 Perform a forward propagation pass on RTL
1237
1238 ffp-contract=
1239 Common Joined RejectNegative Enum(fp_contract_mode) Var(flag_fp_contract_mode) Init(FP_CONTRACT_FAST)
1240 -ffp-contract=[off|on|fast] Perform floating-point expression contraction.
1241
1242 Enum
1243 Name(fp_contract_mode) Type(enum fp_contract_mode) UnknownError(unknown floating point contraction style %qs)
1244
1245 EnumValue
1246 Enum(fp_contract_mode) String(off) Value(FP_CONTRACT_OFF)
1247
1248 ; Not implemented, fall back to conservative FP_CONTRACT_OFF.
1249 EnumValue
1250 Enum(fp_contract_mode) String(on) Value(FP_CONTRACT_OFF)
1251
1252 EnumValue
1253 Enum(fp_contract_mode) String(fast) Value(FP_CONTRACT_FAST)
1254
1255 ; Nonzero means don't put addresses of constant functions in registers.
1256 ; Used for compiling the Unix kernel, where strange substitutions are
1257 ; done on the assembly output.
1258 ffunction-cse
1259 Common Report Var(flag_no_function_cse,0)
1260 Allow function addresses to be held in registers
1261
1262 ffunction-sections
1263 Common Report Var(flag_function_sections)
1264 Place each function into its own section
1265
1266 fgcse
1267 Common Report Var(flag_gcse) Optimization
1268 Perform global common subexpression elimination
1269
1270 fgcse-lm
1271 Common Report Var(flag_gcse_lm) Init(1) Optimization
1272 Perform enhanced load motion during global common subexpression elimination
1273
1274 fgcse-sm
1275 Common Report Var(flag_gcse_sm) Init(0) Optimization
1276 Perform store motion after global common subexpression elimination
1277
1278 fgcse-las
1279 Common Report Var(flag_gcse_las) Init(0) Optimization
1280 Perform redundant load after store elimination in global common subexpression
1281 elimination
1282
1283 fgcse-after-reload
1284 Common Report Var(flag_gcse_after_reload) Optimization
1285 Perform global common subexpression elimination after register allocation
1286 has finished
1287
1288 ; This option is not documented yet as its semantics will change.
1289 fgraphite
1290 Common Report Var(flag_graphite)
1291 Enable in and out of Graphite representation
1292
1293 fgraphite-identity
1294 Common Report Var(flag_graphite_identity) Optimization
1295 Enable Graphite Identity transformation
1296
1297 fgraphite-code-generator=
1298 Common Report RejectNegative Joined Optimization Enum(fgraphite_generator) Var(flag_graphite_code_gen) Init(FGRAPHITE_CODE_GEN_ISL)
1299 Choose code generator of Graphite
1300
1301 Enum
1302 Name(fgraphite_generator) Type(enum fgraphite_generator) UnknownError(unknown code generator of graphite %qs)
1303
1304 EnumValue
1305 Enum(fgraphite_generator) String(isl) Value(FGRAPHITE_CODE_GEN_ISL)
1306
1307 EnumValue
1308 Enum(fgraphite_generator) String(cloog) Value(FGRAPHITE_CODE_GEN_CLOOG)
1309
1310 fhoist-adjacent-loads
1311 Common Report Var(flag_hoist_adjacent_loads) Optimization
1312 Enable hoisting adjacent loads to encourage generating conditional move
1313 instructions
1314
1315 floop-parallelize-all
1316 Common Report Var(flag_loop_parallelize_all) Optimization
1317 Mark all loops as parallel
1318
1319 floop-strip-mine
1320 Common Report Var(flag_loop_strip_mine) Optimization
1321 Enable Loop Strip Mining transformation
1322
1323 floop-interchange
1324 Common Report Var(flag_loop_interchange) Optimization
1325 Enable Loop Interchange transformation
1326
1327 floop-block
1328 Common Report Var(flag_loop_block) Optimization
1329 Enable Loop Blocking transformation
1330
1331 fgnu-tm
1332 Common Report Var(flag_tm)
1333 Enable support for GNU transactional memory
1334
1335 fgnu-unique
1336 Common Report Var(flag_gnu_unique) Init(1)
1337 Use STB_GNU_UNIQUE if supported by the assembler
1338
1339 floop-flatten
1340 Common Ignore
1341 Does nothing. Preserved for backward compatibility.
1342
1343 floop-nest-optimize
1344 Common Report Var(flag_loop_optimize_isl) Optimization
1345 Enable the ISL based loop nest optimizer
1346
1347 fstrict-volatile-bitfields
1348 Common Report Var(flag_strict_volatile_bitfields) Init(-1)
1349 Force bitfield accesses to match their type width
1350
1351 fguess-branch-probability
1352 Common Report Var(flag_guess_branch_prob) Optimization
1353 Enable guessing of branch probabilities
1354
1355 ; Nonzero means ignore `#ident' directives.  0 means handle them.
1356 ; Generate position-independent code for executables if possible
1357 ; On SVR4 targets, it also controls whether or not to emit a
1358 ; string identifying the compiler.
1359 fident
1360 Common Report Var(flag_no_ident,0)
1361 Process #ident directives
1362
1363 fif-conversion
1364 Common Report Var(flag_if_conversion) Optimization
1365 Perform conversion of conditional jumps to branchless equivalents
1366
1367 fif-conversion2
1368 Common Report Var(flag_if_conversion2) Optimization
1369 Perform conversion of conditional jumps to conditional execution
1370
1371 fstack-reuse=
1372 Common Joined RejectNegative Enum(stack_reuse_level) Var(flag_stack_reuse) Init(SR_ALL)
1373 -fstack-reuse=[all|named_vars|none] Set stack reuse level for local variables.
1374
1375 Enum
1376 Name(stack_reuse_level) Type(enum stack_reuse_level) UnknownError(unknown Stack Reuse Level %qs)
1377
1378 EnumValue
1379 Enum(stack_reuse_level) String(all) Value(SR_ALL)
1380
1381 EnumValue
1382 Enum(stack_reuse_level) String(named_vars) Value(SR_NAMED_VARS)
1383
1384 EnumValue
1385 Enum(stack_reuse_level) String(none) Value(SR_NONE)
1386
1387 ftree-loop-if-convert
1388 Common Report Var(flag_tree_loop_if_convert) Init(-1) Optimization
1389 Convert conditional jumps in innermost loops to branchless equivalents
1390
1391 ftree-loop-if-convert-stores
1392 Common Report Var(flag_tree_loop_if_convert_stores) Optimization
1393 Also if-convert conditional jumps containing memory writes
1394
1395 ; -finhibit-size-directive inhibits output of .size for ELF.
1396 ; This is used only for compiling crtstuff.c,
1397 ; and it may be extended to other effects
1398 ; needed for crtstuff.c on other systems.
1399 finhibit-size-directive
1400 Common Report Var(flag_inhibit_size_directive)
1401 Do not generate .size directives
1402
1403 findirect-inlining
1404 Common Report Var(flag_indirect_inlining)
1405 Perform indirect inlining
1406
1407 ; General flag to enable inlining.  Specifying -fno-inline will disable
1408 ; all inlining apart from always-inline functions.
1409 finline
1410 Common Report Var(flag_no_inline,0) Init(0) Optimization
1411 Enable inlining of function declared \"inline\", disabling disables all inlining
1412
1413 finline-small-functions
1414 Common Report Var(flag_inline_small_functions) Optimization
1415 Integrate functions into their callers when code size is known not to grow
1416
1417 finline-functions
1418 Common Report Var(flag_inline_functions) Optimization
1419 Integrate functions not declared \"inline\" into their callers when profitable
1420
1421 finline-functions-called-once
1422 Common Report Var(flag_inline_functions_called_once) Optimization
1423 Integrate functions only required by their single caller
1424
1425 finline-limit-
1426 Common RejectNegative Joined Alias(finline-limit=)
1427
1428 finline-limit=
1429 Common RejectNegative Joined UInteger
1430 -finline-limit=<number> Limit the size of inlined functions to <number>
1431
1432 finline-atomics
1433 Common Report Var(flag_inline_atomics) Init(1) Optimization
1434 Inline __atomic operations when a lock free instruction sequence is available.
1435
1436 finstrument-functions
1437 Common Report Var(flag_instrument_function_entry_exit)
1438 Instrument function entry and exit with profiling calls
1439
1440 finstrument-functions-exclude-function-list=
1441 Common RejectNegative Joined
1442 -finstrument-functions-exclude-function-list=name,...  Do not instrument listed functions
1443
1444 finstrument-functions-exclude-file-list=
1445 Common RejectNegative Joined
1446 -finstrument-functions-exclude-file-list=filename,...  Do not instrument functions listed in files
1447
1448 fipa-cp
1449 Common Report Var(flag_ipa_cp) Optimization
1450 Perform interprocedural constant propagation
1451
1452 fipa-cp-clone
1453 Common Report Var(flag_ipa_cp_clone) Optimization
1454 Perform cloning to make Interprocedural constant propagation stronger
1455
1456 fipa-profile
1457 Common Report Var(flag_ipa_profile) Init(0) Optimization
1458 Perform interprocedural profile propagation
1459
1460 fipa-pta
1461 Common Report Var(flag_ipa_pta) Init(0) Optimization
1462 Perform interprocedural points-to analysis
1463
1464 fipa-pure-const
1465 Common Report Var(flag_ipa_pure_const) Init(0) Optimization
1466 Discover pure and const functions
1467
1468 fipa-icf
1469 Common Report Var(flag_ipa_icf) Optimization
1470 Perform Identical Code Folding for functions and read-only variables
1471
1472 fipa-icf-functions
1473 Common Report Var(flag_ipa_icf_functions) Optimization
1474 Perform Identical Code Folding for functions
1475
1476 fipa-icf-variables
1477 Common Report Var(flag_ipa_icf_variables) Optimization
1478 Perform Identical Code Folding for variables
1479
1480 fipa-reference
1481 Common Report Var(flag_ipa_reference) Init(0) Optimization
1482 Discover readonly and non addressable static variables
1483
1484 fipa-matrix-reorg
1485 Common Ignore
1486 Does nothing. Preserved for backward compatibility.
1487
1488 fipa-struct-reorg
1489 Common Ignore
1490 Does nothing. Preserved for backward compatibility.
1491
1492 fira-algorithm=
1493 Common Joined RejectNegative Enum(ira_algorithm) Var(flag_ira_algorithm) Init(IRA_ALGORITHM_CB)
1494 -fira-algorithm=[CB|priority] Set the used IRA algorithm
1495
1496 Enum
1497 Name(ira_algorithm) Type(enum ira_algorithm) UnknownError(unknown IRA algorithm %qs)
1498
1499 EnumValue
1500 Enum(ira_algorithm) String(CB) Value(IRA_ALGORITHM_CB)
1501
1502 EnumValue
1503 Enum(ira_algorithm) String(priority) Value(IRA_ALGORITHM_PRIORITY)
1504
1505 fira-region=
1506 Common Joined RejectNegative Enum(ira_region) Var(flag_ira_region) Init(IRA_REGION_AUTODETECT)
1507 -fira-region=[one|all|mixed] Set regions for IRA
1508
1509 Enum
1510 Name(ira_region) Type(enum ira_region) UnknownError(unknown IRA region %qs)
1511
1512 EnumValue
1513 Enum(ira_region) String(one) Value(IRA_REGION_ONE)
1514
1515 EnumValue
1516 Enum(ira_region) String(all) Value(IRA_REGION_ALL)
1517
1518 EnumValue
1519 Enum(ira_region) String(mixed) Value(IRA_REGION_MIXED)
1520
1521 fira-hoist-pressure
1522 Common Report Var(flag_ira_hoist_pressure) Init(1) Optimization
1523 Use IRA based register pressure calculation
1524 in RTL hoist optimizations.
1525
1526 fira-loop-pressure
1527 Common Report Var(flag_ira_loop_pressure) Optimization
1528 Use IRA based register pressure calculation
1529 in RTL loop optimizations.
1530
1531 fira-share-save-slots
1532 Common Report Var(flag_ira_share_save_slots) Init(1)
1533 Share slots for saving different hard registers.
1534
1535 fira-share-spill-slots
1536 Common Report Var(flag_ira_share_spill_slots) Init(1)
1537 Share stack slots for spilled pseudo-registers.
1538
1539 fira-verbose=
1540 Common RejectNegative Joined UInteger Var(flag_ira_verbose) Init(5)
1541 -fira-verbose=<number>  Control IRA's level of diagnostic messages.
1542
1543 fivopts
1544 Common Report Var(flag_ivopts) Init(1) Optimization
1545 Optimize induction variables on trees
1546
1547 fjump-tables
1548 Common Var(flag_jump_tables) Init(1) Optimization
1549 Use jump tables for sufficiently large switch statements
1550
1551 fkeep-inline-functions
1552 Common Report Var(flag_keep_inline_functions)
1553 Generate code for functions even if they are fully inlined
1554
1555 fkeep-static-consts
1556 Common Report Var(flag_keep_static_consts) Init(1)
1557 Emit static const variables even if they are not used
1558
1559 fleading-underscore
1560 Common Report Var(flag_leading_underscore) Init(-1)
1561 Give external symbols a leading underscore
1562
1563 floop-optimize
1564 Common Ignore
1565 Does nothing.  Preserved for backward compatibility.
1566
1567 flto
1568 Common
1569 Enable link-time optimization.
1570
1571 flto=
1572 Common RejectNegative Joined Var(flag_lto)
1573 Link-time optimization with number of parallel jobs or jobserver.
1574
1575 Enum
1576 Name(lto_partition_model) Type(enum lto_partition_model) UnknownError(unknown LTO partitioning model %qs)
1577
1578 EnumValue
1579 Enum(lto_partition_model) String(none) Value(LTO_PARTITION_NONE)
1580
1581 EnumValue
1582 Enum(lto_partition_model) String(one) Value(LTO_PARTITION_ONE)
1583
1584 EnumValue
1585 Enum(lto_partition_model) String(balanced) Value(LTO_PARTITION_BALANCED)
1586
1587 EnumValue
1588 Enum(lto_partition_model) String(1to1) Value(LTO_PARTITION_1TO1)
1589
1590 EnumValue
1591 Enum(lto_partition_model) String(max) Value(LTO_PARTITION_MAX)
1592
1593 flto-partition=
1594 Common Joined RejectNegative Enum(lto_partition_model) Var(flag_lto_partition) Init(LTO_PARTITION_BALANCED)
1595 Specify the algorithm to partition symbols and vars at linktime
1596
1597 ; The initial value of -1 comes from Z_DEFAULT_COMPRESSION in zlib.h.
1598 flto-compression-level=
1599 Common Joined RejectNegative UInteger Var(flag_lto_compression_level) Init(-1)
1600 -flto-compression-level=<number>        Use zlib compression level <number> for IL
1601
1602 flto-odr-type-merging
1603 Common Report Var(flag_lto_odr_type_mering) Init(1)
1604 Merge C++ types using One Definition Rule
1605
1606 flto-report
1607 Common Report Var(flag_lto_report) Init(0)
1608 Report various link-time optimization statistics
1609
1610 flto-report-wpa
1611 Common Report Var(flag_lto_report_wpa) Init(0)
1612 Report various link-time optimization statistics for WPA only
1613
1614 fmath-errno
1615 Common Report Var(flag_errno_math) Init(1) Optimization SetByCombined
1616 Set errno after built-in math functions
1617
1618 fmax-errors=
1619 Common Joined RejectNegative UInteger Var(flag_max_errors)
1620 -fmax-errors=<number>   Maximum number of errors to report
1621
1622 fmem-report
1623 Common Report Var(mem_report)
1624 Report on permanent memory allocation
1625
1626 fmem-report-wpa
1627 Common Report Var(mem_report_wpa)
1628 Report on permanent memory allocation in WPA only
1629
1630 ; This will attempt to merge constant section constants, if 1 only
1631 ; string constants and constants from constant pool, if 2 also constant
1632 ; variables.
1633 fmerge-all-constants
1634 Common Report Var(flag_merge_constants,2) Init(1) Optimization
1635 Attempt to merge identical constants and constant variables
1636
1637 fmerge-constants
1638 Common Report Var(flag_merge_constants,1) Optimization
1639 Attempt to merge identical constants across compilation units
1640
1641 fmerge-debug-strings
1642 Common Report Var(flag_merge_debug_strings) Init(1)
1643 Attempt to merge identical debug strings across compilation units
1644
1645 fmessage-length=
1646 Common RejectNegative Joined UInteger
1647 -fmessage-length=<number>       Limit diagnostics to <number> characters per line.  0 suppresses line-wrapping
1648
1649 fmodulo-sched
1650 Common Report Var(flag_modulo_sched) Optimization
1651 Perform SMS based modulo scheduling before the first scheduling pass
1652
1653 fmodulo-sched-allow-regmoves
1654 Common Report Var(flag_modulo_sched_allow_regmoves)
1655 Perform SMS based modulo scheduling with register moves allowed
1656
1657 fmove-loop-invariants
1658 Common Report Var(flag_move_loop_invariants) Optimization
1659 Move loop invariant computations out of loops
1660
1661 fdce
1662 Common Var(flag_dce) Init(1) Optimization
1663 Use the RTL dead code elimination pass
1664
1665 fdse
1666 Common Var(flag_dse) Init(1) Optimization
1667 Use the RTL dead store elimination pass
1668
1669 freschedule-modulo-scheduled-loops
1670 Common Report Var(flag_resched_modulo_sched) Optimization
1671 Enable/Disable the traditional scheduling in loops that already passed modulo scheduling
1672
1673 fnon-call-exceptions
1674 Common Report Var(flag_non_call_exceptions) Optimization
1675 Support synchronous non-call exceptions
1676
1677 fomit-frame-pointer
1678 Common Report Var(flag_omit_frame_pointer) Optimization
1679 When possible do not generate stack frames
1680
1681 fopt-info
1682 Common Report Var(flag_opt_info) Optimization
1683 Enable all optimization info dumps on stderr
1684
1685 fopt-info-
1686 Common Joined RejectNegative Var(common_deferred_options) Defer
1687 -fopt-info[-<type>=filename]    Dump compiler optimization details
1688
1689 foptimize-register-move
1690 Common Ignore
1691 Does nothing. Preserved for backward compatibility.
1692
1693 foptimize-sibling-calls
1694 Common Report Var(flag_optimize_sibling_calls) Optimization
1695 Optimize sibling and tail recursive calls
1696
1697 fpartial-inlining
1698 Common Report Var(flag_partial_inlining)
1699 Perform partial inlining
1700
1701 fpre-ipa-mem-report
1702 Common Report Var(pre_ipa_mem_report)
1703 Report on memory allocation before interprocedural optimization
1704
1705 fpost-ipa-mem-report
1706 Common Report Var(post_ipa_mem_report)
1707 Report on memory allocation before interprocedural optimization
1708
1709 fpack-struct
1710 Common Report Var(flag_pack_struct) Optimization
1711 Pack structure members together without holes
1712
1713 fpack-struct=
1714 Common RejectNegative Joined UInteger Optimization
1715 -fpack-struct=<number>  Set initial maximum structure member alignment
1716
1717 fpcc-struct-return
1718 Common Report Var(flag_pcc_struct_return,1) Init(DEFAULT_PCC_STRUCT_RETURN)
1719 Return small aggregates in memory, not registers
1720
1721 fpeel-loops
1722 Common Report Var(flag_peel_loops) Optimization
1723 Perform loop peeling
1724
1725 fpeephole
1726 Common Report Var(flag_no_peephole,0) Optimization
1727 Enable machine specific peephole optimizations
1728
1729 fpeephole2
1730 Common Report Var(flag_peephole2) Optimization
1731 Enable an RTL peephole pass before sched2
1732
1733 fPIC
1734 Common Report Var(flag_pic,2) Negative(fPIE)
1735 Generate position-independent code if possible (large mode)
1736
1737 fPIE
1738 Common Report Var(flag_pie,2) Negative(fpic)
1739 Generate position-independent code for executables if possible (large mode)
1740
1741 fpic
1742 Common Report Var(flag_pic,1) Negative(fpie)
1743 Generate position-independent code if possible (small mode)
1744
1745 fpie
1746 Common Report Var(flag_pie,1) Negative(fPIC)
1747 Generate position-independent code for executables if possible (small mode)
1748
1749 fplugin=
1750 Common Joined RejectNegative Var(common_deferred_options) Defer
1751 Specify a plugin to load
1752
1753 fplugin-arg-
1754 Common Joined RejectNegative Var(common_deferred_options) Defer
1755 -fplugin-arg-<name>-<key>[=<value>]     Specify argument <key>=<value> for plugin <name>
1756
1757 fpredictive-commoning
1758 Common Report Var(flag_predictive_commoning) Optimization
1759 Run predictive commoning optimization.
1760
1761 fprefetch-loop-arrays
1762 Common Report Var(flag_prefetch_loop_arrays) Init(-1) Optimization
1763 Generate prefetch instructions, if available, for arrays in loops
1764
1765 fprofile
1766 Common Report Var(profile_flag)
1767 Enable basic program profiling code
1768
1769 fprofile-arcs
1770 Common Report Var(profile_arc_flag)
1771 Insert arc-based program profiling code
1772
1773 fprofile-dir=
1774 Common Joined RejectNegative Var(profile_data_prefix)
1775 Set the top-level directory for storing the profile data.
1776 The default is 'pwd'.
1777
1778 fprofile-correction
1779 Common Report Var(flag_profile_correction)
1780 Enable correction of flow inconsistent profile data input
1781
1782 fprofile-generate
1783 Common
1784 Enable common options for generating profile info for profile feedback directed optimizations
1785
1786 fprofile-generate=
1787 Common Joined RejectNegative
1788 Enable common options for generating profile info for profile feedback directed optimizations, and set -fprofile-dir=
1789
1790 fprofile-use
1791 Common Var(flag_profile_use)
1792 Enable common options for performing profile feedback directed optimizations
1793
1794 fprofile-use=
1795 Common Joined RejectNegative
1796 Enable common options for performing profile feedback directed optimizations, and set -fprofile-dir=
1797
1798 fprofile-values
1799 Common Report Var(flag_profile_values)
1800 Insert code to profile values of expressions
1801
1802 fprofile-report
1803 Common Report Var(profile_report)
1804 Report on consistency of profile
1805
1806 fprofile-reorder-functions
1807 Common Report Var(flag_profile_reorder_functions)
1808 Enable function reordering that improves code placement
1809
1810 frandom-seed
1811 Common Var(common_deferred_options) Defer
1812
1813 frandom-seed=
1814 Common Joined RejectNegative Var(common_deferred_options) Defer
1815 -frandom-seed=<number>  Make compile reproducible using <number>
1816
1817 ; This switch causes the command line that was used to create an
1818 ; object file to be recorded into the object file.  The exact format
1819 ; of this recording is target and binary file format dependent.
1820 ; It is related to the -fverbose-asm switch, but that switch only
1821 ; records information in the assembler output file as comments, so
1822 ; they never reach the object file.
1823 frecord-gcc-switches
1824 Common Report Var(flag_record_gcc_switches)
1825 Record gcc command line switches in the object file.
1826
1827 freg-struct-return
1828 Common Report Var(flag_pcc_struct_return,0) Optimization
1829 Return small aggregates in registers
1830
1831 fregmove
1832 Common Ignore
1833 Does nothing. Preserved for backward compatibility.
1834
1835 flive-range-shrinkage
1836 Common Report Var(flag_live_range_shrinkage) Init(0) Optimization
1837 Relief of register pressure through live range shrinkage
1838
1839 frename-registers
1840 Common Report Var(flag_rename_registers) Init(2) Optimization
1841 Perform a register renaming optimization pass
1842
1843 freorder-blocks
1844 Common Report Var(flag_reorder_blocks) Optimization
1845 Reorder basic blocks to improve code placement
1846
1847 freorder-blocks-and-partition
1848 Common Report Var(flag_reorder_blocks_and_partition) Optimization
1849 Reorder basic blocks and partition into hot and cold sections
1850
1851 freorder-functions
1852 Common Report Var(flag_reorder_functions) Optimization
1853 Reorder functions to improve code placement
1854
1855 frerun-cse-after-loop
1856 Common Report Var(flag_rerun_cse_after_loop) Optimization
1857 Add a common subexpression elimination pass after loop optimizations
1858
1859 frerun-loop-opt
1860 Common Ignore
1861 Does nothing.  Preserved for backward compatibility.
1862
1863 frounding-math
1864 Common Report Var(flag_rounding_math) Optimization SetByCombined
1865 Disable optimizations that assume default FP rounding behavior
1866
1867 fsched-interblock
1868 Common Report Var(flag_schedule_interblock) Init(1) Optimization
1869 Enable scheduling across basic blocks
1870
1871 fsched-pressure
1872 Common Report Var(flag_sched_pressure) Init(0) Optimization
1873 Enable register pressure sensitive insn scheduling
1874
1875 fsched-spec
1876 Common Report Var(flag_schedule_speculative) Init(1) Optimization
1877 Allow speculative motion of non-loads
1878
1879 fsched-spec-load
1880 Common Report Var(flag_schedule_speculative_load) Optimization
1881 Allow speculative motion of some loads
1882
1883 fsched-spec-load-dangerous
1884 Common Report Var(flag_schedule_speculative_load_dangerous) Optimization
1885 Allow speculative motion of more loads
1886
1887 fsched-verbose=
1888 Common RejectNegative Joined UInteger Var(sched_verbose_param)
1889 -fsched-verbose=<number>        Set the verbosity level of the scheduler
1890
1891 fsched2-use-superblocks
1892 Common Report Var(flag_sched2_use_superblocks) Optimization
1893 If scheduling post reload, do superblock scheduling
1894
1895 fsched2-use-traces
1896 Common Ignore
1897 Does nothing.  Preserved for backward compatibility.
1898
1899 fschedule-insns
1900 Common Report Var(flag_schedule_insns) Optimization
1901 Reschedule instructions before register allocation
1902
1903 fschedule-insns2
1904 Common Report Var(flag_schedule_insns_after_reload) Optimization
1905 Reschedule instructions after register allocation
1906
1907 ; This flag should be on when a target implements non-trivial
1908 ; scheduling hooks, maybe saving some information for its own sake.
1909 ; On IA64, for example, this is used for correct bundling.
1910 fselective-scheduling
1911 Common Report Var(flag_selective_scheduling) Optimization
1912 Schedule instructions using selective scheduling algorithm
1913
1914 fselective-scheduling2
1915 Common Report Var(flag_selective_scheduling2) Optimization
1916 Run selective scheduling after reload
1917
1918 fsel-sched-pipelining
1919 Common Report Var(flag_sel_sched_pipelining) Init(0) Optimization
1920 Perform software pipelining of inner loops during selective scheduling
1921
1922 fsel-sched-pipelining-outer-loops
1923 Common Report Var(flag_sel_sched_pipelining_outer_loops) Init(0) Optimization
1924 Perform software pipelining of outer loops during selective scheduling
1925
1926 fsel-sched-reschedule-pipelined
1927 Common Report Var(flag_sel_sched_reschedule_pipelined) Init(0) Optimization
1928 Reschedule pipelined regions without pipelining
1929
1930 fsemantic-interposition
1931 Common Report Var(flag_semantic_interposition) Init(1)
1932 Allow interposing function (or variables) by ones with different semantics (or initializer) respectively by dynamic linker
1933
1934 ; sched_stalled_insns means that insns can be moved prematurely from the queue
1935 ; of stalled insns into the ready list.
1936 fsched-stalled-insns
1937 Common Report Var(flag_sched_stalled_insns) Optimization UInteger
1938 Allow premature scheduling of queued insns
1939
1940 fsched-stalled-insns=
1941 Common RejectNegative Joined UInteger
1942 -fsched-stalled-insns=<number>  Set number of queued insns that can be prematurely scheduled
1943
1944 ; sched_stalled_insns_dep controls how many recently scheduled cycles will
1945 ; be examined for a dependency on a stalled insn that is candidate for
1946 ; premature removal from the queue of stalled insns into the ready list (has
1947 ; an effect only if the flag 'sched_stalled_insns' is set).
1948 fsched-stalled-insns-dep
1949 Common Report Var(flag_sched_stalled_insns_dep,1) Init(1) Optimization UInteger
1950 Set dependence distance checking in premature scheduling of queued insns
1951
1952 fsched-stalled-insns-dep=
1953 Common RejectNegative Joined UInteger
1954 -fsched-stalled-insns-dep=<number>      Set dependence distance checking in premature scheduling of queued insns
1955
1956 fsched-group-heuristic
1957 Common Report Var(flag_sched_group_heuristic) Init(1) Optimization
1958 Enable the group heuristic in the scheduler
1959
1960 fsched-critical-path-heuristic
1961 Common Report Var(flag_sched_critical_path_heuristic) Init(1) Optimization
1962 Enable the critical path heuristic in the scheduler
1963
1964 fsched-spec-insn-heuristic
1965 Common Report Var(flag_sched_spec_insn_heuristic) Init(1) Optimization
1966 Enable the speculative instruction heuristic in the scheduler
1967
1968 fsched-rank-heuristic
1969 Common Report Var(flag_sched_rank_heuristic) Init(1) Optimization
1970 Enable the rank heuristic in the scheduler
1971
1972 fsched-last-insn-heuristic
1973 Common Report Var(flag_sched_last_insn_heuristic) Init(1) Optimization
1974 Enable the last instruction heuristic in the scheduler
1975
1976 fsched-dep-count-heuristic
1977 Common Report Var(flag_sched_dep_count_heuristic) Init(1) Optimization
1978 Enable the dependent count heuristic in the scheduler
1979
1980 fsection-anchors
1981 Common Report Var(flag_section_anchors) Optimization
1982 Access data in the same section from shared anchor points
1983
1984 fsee
1985 Common Ignore
1986 Does nothing.  Preserved for backward compatibility.
1987
1988 fzee
1989 Common Ignore
1990 Does nothing.  Preserved for backward compatibility.
1991
1992 free
1993 Common Report Var(flag_ree) Init(0)
1994 Turn on Redundant Extensions Elimination pass.
1995
1996 fshow-column
1997 Common Report Var(flag_show_column) Init(1)
1998 Show column numbers in diagnostics, when available.  Default on
1999
2000 fshrink-wrap
2001 Common Report Var(flag_shrink_wrap) Optimization
2002 Emit function prologues only before parts of the function that need it,
2003 rather than at the top of the function.
2004
2005 fsignaling-nans
2006 Common Report Var(flag_signaling_nans) Optimization SetByCombined
2007 Disable optimizations observable by IEEE signaling NaNs
2008
2009 fsigned-zeros
2010 Common Report Var(flag_signed_zeros) Init(1) Optimization SetByCombined
2011 Disable floating point optimizations that ignore the IEEE signedness of zero
2012
2013 fsingle-precision-constant
2014 Common Report Var(flag_single_precision_constant) Optimization
2015 Convert floating point constants to single precision constants
2016
2017 fsplit-ivs-in-unroller
2018 Common Report Var(flag_split_ivs_in_unroller) Init(1) Optimization
2019 Split lifetimes of induction variables when loops are unrolled
2020
2021 fsplit-stack
2022 Common Report Var(flag_split_stack) Init(-1)
2023 Generate discontiguous stack frames
2024
2025 fsplit-wide-types
2026 Common Report Var(flag_split_wide_types) Optimization
2027 Split wide types into independent registers
2028
2029 fssa-phiopt
2030 Common Report Var(flag_ssa_phiopt) Optimization
2031 Optimize conditional patterns using SSA PHI nodes
2032
2033 fvariable-expansion-in-unroller
2034 Common Report Var(flag_variable_expansion_in_unroller) Optimization
2035 Apply variable expansion when loops are unrolled
2036
2037 fstack-check=
2038 Common Report RejectNegative Joined
2039 -fstack-check=[no|generic|specific]     Insert stack checking code into the program
2040
2041 fstack-check
2042 Common Alias(fstack-check=, specific, no)
2043 Insert stack checking code into the program.  Same as -fstack-check=specific
2044
2045 fstack-limit
2046 Common Var(common_deferred_options) Defer
2047
2048 fstack-limit-register=
2049 Common RejectNegative Joined Var(common_deferred_options) Defer
2050 -fstack-limit-register=<register>       Trap if the stack goes past <register>
2051
2052 fstack-limit-symbol=
2053 Common RejectNegative Joined Var(common_deferred_options) Defer
2054 -fstack-limit-symbol=<name>     Trap if the stack goes past symbol <name>
2055
2056 fstack-protector
2057 Common Report Var(flag_stack_protect, 1)
2058 Use propolice as a stack protection method
2059
2060 fstack-protector-all
2061 Common Report RejectNegative Var(flag_stack_protect, 2)
2062 Use a stack protection method for every function
2063
2064 fstack-protector-strong
2065 Common Report RejectNegative Var(flag_stack_protect, 3)
2066 Use a smart stack protection method for certain functions
2067
2068 fstack-usage
2069 Common RejectNegative Var(flag_stack_usage)
2070 Output stack usage information on a per-function basis
2071
2072 fstrength-reduce
2073 Common Ignore
2074 Does nothing.  Preserved for backward compatibility.
2075
2076 ; Nonzero if we should do (language-dependent) alias analysis.
2077 ; Typically, this analysis will assume that expressions of certain
2078 ; types do not alias expressions of certain other types.  Only used
2079 ; if alias analysis (in general) is enabled.
2080 fstrict-aliasing
2081 Common Report Var(flag_strict_aliasing) Optimization
2082 Assume strict aliasing rules apply
2083
2084 fstrict-overflow
2085 Common Report Var(flag_strict_overflow)
2086 Treat signed overflow as undefined
2087
2088 fsync-libcalls
2089 Common Report Var(flag_sync_libcalls) Init(1)
2090 Implement __atomic operations via libcalls to legacy __sync functions
2091
2092 fsyntax-only
2093 Common Report Var(flag_syntax_only)
2094 Check for syntax errors, then stop
2095
2096 ftest-coverage
2097 Common Report Var(flag_test_coverage)
2098 Create data files needed by \"gcov\"
2099
2100 fthread-jumps
2101 Common Report Var(flag_thread_jumps) Optimization
2102 Perform jump threading optimizations
2103
2104 ftime-report
2105 Common Report Var(time_report)
2106 Report the time taken by each compiler pass
2107
2108 ftls-model=
2109 Common Joined RejectNegative Enum(tls_model) Var(flag_tls_default) Init(TLS_MODEL_GLOBAL_DYNAMIC)
2110 -ftls-model=[global-dynamic|local-dynamic|initial-exec|local-exec]      Set the default thread-local storage code generation model
2111
2112 Enum
2113 Name(tls_model) Type(enum tls_model) UnknownError(unknown TLS model %qs)
2114
2115 EnumValue
2116 Enum(tls_model) String(global-dynamic) Value(TLS_MODEL_GLOBAL_DYNAMIC)
2117
2118 EnumValue
2119 Enum(tls_model) String(local-dynamic) Value(TLS_MODEL_LOCAL_DYNAMIC)
2120
2121 EnumValue
2122 Enum(tls_model) String(initial-exec) Value(TLS_MODEL_INITIAL_EXEC)
2123
2124 EnumValue
2125 Enum(tls_model) String(local-exec) Value(TLS_MODEL_LOCAL_EXEC)
2126
2127 ftoplevel-reorder
2128 Common Report Var(flag_toplevel_reorder) Init(2) Optimization
2129 Reorder top level functions, variables, and asms
2130
2131 ftracer
2132 Common Report Var(flag_tracer)
2133 Perform superblock formation via tail duplication
2134
2135 ; Zero means that floating-point math operations cannot generate a
2136 ; (user-visible) trap.  This is the case, for example, in nonstop
2137 ; IEEE 754 arithmetic.
2138 ftrapping-math
2139 Common Report Var(flag_trapping_math) Init(1) Optimization SetByCombined
2140 Assume floating-point operations can trap
2141
2142 ftrapv
2143 Common Report Var(flag_trapv) Optimization
2144 Trap for signed overflow in addition, subtraction and multiplication
2145
2146 ftree-ccp
2147 Common Report Var(flag_tree_ccp) Optimization
2148 Enable SSA-CCP optimization on trees
2149
2150 ftree-bit-ccp
2151 Common Report Var(flag_tree_bit_ccp) Optimization
2152 Enable SSA-BIT-CCP optimization on trees
2153
2154 ftree-store-ccp
2155 Common Ignore
2156 Does nothing.  Preserved for backward compatibility.
2157
2158 ftree-ch
2159 Common Report Var(flag_tree_ch) Optimization
2160 Enable loop header copying on trees
2161
2162 ftree-coalesce-inlined-vars
2163 Common Report Var(flag_ssa_coalesce_vars,1) Init(2) RejectNegative Optimization
2164 Enable coalescing of copy-related user variables that are inlined
2165
2166 ftree-coalesce-vars
2167 Common Report Var(flag_ssa_coalesce_vars,2) Optimization
2168 Enable coalescing of all copy-related user variables
2169
2170 ftree-copyrename
2171 Common Report Var(flag_tree_copyrename) Optimization
2172 Replace SSA temporaries with better names in copies
2173
2174 ftree-copy-prop
2175 Common Report Var(flag_tree_copy_prop) Optimization
2176 Enable copy propagation on trees
2177
2178 ftree-store-copy-prop
2179 Common Ignore
2180 Does nothing.  Preserved for backward compatibility.
2181
2182 ftree-cselim
2183 Common Report Var(flag_tree_cselim) Init(2) Optimization
2184 Transform condition stores into unconditional ones
2185
2186 ftree-switch-conversion
2187 Common Report Var(flag_tree_switch_conversion) Optimization
2188 Perform conversions of switch initializations.
2189
2190 ftree-dce
2191 Common Report Var(flag_tree_dce) Optimization
2192 Enable SSA dead code elimination optimization on trees
2193
2194 ftree-dominator-opts
2195 Common Report Var(flag_tree_dom) Optimization
2196 Enable dominator optimizations
2197
2198 ftree-tail-merge
2199 Common Report Var(flag_tree_tail_merge) Optimization
2200 Enable tail merging on trees
2201
2202 ftree-dse
2203 Common Report Var(flag_tree_dse) Optimization
2204 Enable dead store elimination
2205
2206 ftree-forwprop
2207 Common Report Var(flag_tree_forwprop) Init(1) Optimization
2208 Enable forward propagation on trees
2209
2210 ftree-fre
2211 Common Report Var(flag_tree_fre) Optimization
2212 Enable Full Redundancy Elimination (FRE) on trees
2213
2214 foptimize-strlen
2215 Common Report Var(flag_optimize_strlen) Optimization
2216 Enable string length optimizations on trees
2217
2218 fisolate-erroneous-paths-dereference
2219 Common Report Var(flag_isolate_erroneous_paths_dereference) Optimization
2220 Detect paths which trigger erroneous or undefined behaviour due to
2221 dereferencing a NULL pointer.  Isolate those paths from the main control
2222 flow and turn the statement with erroneous or undefined behaviour into a trap.
2223
2224 fisolate-erroneous-paths-attribute
2225 Common Report Var(flag_isolate_erroneous_paths_attribute) Optimization
2226 Detect paths which trigger erroneous or undefined behaviour due a NULL value
2227 being used in a way which is forbidden by a returns_nonnull or nonnull
2228 attribute.  Isolate those paths from the main control flow and turn the
2229 statement with erroneous or undefined behaviour into a trap.
2230
2231 ftree-loop-distribution
2232 Common Report Var(flag_tree_loop_distribution) Optimization
2233 Enable loop distribution on trees
2234
2235 ftree-loop-distribute-patterns
2236 Common Report Var(flag_tree_loop_distribute_patterns) Optimization
2237 Enable loop distribution for patterns transformed into a library call
2238
2239 ftree-loop-im
2240 Common Report Var(flag_tree_loop_im) Init(1) Optimization
2241 Enable loop invariant motion on trees
2242
2243 ftree-loop-linear
2244 Common Alias(floop-interchange)
2245 Enable loop interchange transforms.  Same as -floop-interchange
2246
2247 ftree-loop-ivcanon
2248 Common Report Var(flag_tree_loop_ivcanon) Init(1) Optimization
2249 Create canonical induction variables in loops
2250
2251 ftree-loop-optimize
2252 Common Report Var(flag_tree_loop_optimize) Init(1) Optimization
2253 Enable loop optimizations on tree level
2254
2255 ftree-parallelize-loops=
2256 Common Report Joined RejectNegative UInteger Var(flag_tree_parallelize_loops) Init(1)
2257 Enable automatic parallelization of loops
2258
2259 ftree-phiprop
2260 Common Report Var(flag_tree_phiprop) Init(1) Optimization
2261 Enable hoisting loads from conditional pointers.
2262
2263 ftree-pre
2264 Common Report Var(flag_tree_pre) Optimization
2265 Enable SSA-PRE optimization on trees
2266
2267 ftree-partial-pre
2268 Common Report Var(flag_tree_partial_pre) Optimization
2269 In SSA-PRE optimization on trees, enable partial-partial redundancy elimination
2270
2271 ftree-pta
2272 Common Report Var(flag_tree_pta) Optimization
2273 Perform function-local points-to analysis on trees.
2274
2275 ftree-reassoc
2276 Common Report Var(flag_tree_reassoc) Init(1) Optimization
2277 Enable reassociation on tree level
2278
2279 ftree-salias
2280 Common Ignore
2281 Does nothing.  Preserved for backward compatibility.
2282
2283 ftree-sink
2284 Common Report Var(flag_tree_sink) Optimization
2285 Enable SSA code sinking on trees
2286
2287 ftree-slsr
2288 Common Report Var(flag_tree_slsr) Optimization
2289 Perform straight-line strength reduction
2290
2291 ftree-sra
2292 Common Report Var(flag_tree_sra) Optimization
2293 Perform scalar replacement of aggregates
2294
2295 ftree-ter
2296 Common Report Var(flag_tree_ter) Optimization
2297 Replace temporary expressions in the SSA->normal pass
2298
2299 ftree-lrs
2300 Common Report Var(flag_tree_live_range_split) Optimization
2301 Perform live range splitting during the SSA->normal pass
2302
2303 ftree-vrp
2304 Common Report Var(flag_tree_vrp) Init(0) Optimization
2305 Perform Value Range Propagation on trees
2306
2307 funit-at-a-time
2308 Common Report Var(flag_unit_at_a_time) Init(1) Optimization
2309 Compile whole compilation unit at a time
2310
2311 funroll-loops
2312 Common Report Var(flag_unroll_loops) Optimization
2313 Perform loop unrolling when iteration count is known
2314
2315 funroll-all-loops
2316 Common Report Var(flag_unroll_all_loops) Optimization
2317 Perform loop unrolling for all loops
2318
2319 ; Nonzero means that loop optimizer may assume that the induction variables
2320 ; that control loops do not overflow and that the loops with nontrivial
2321 ; exit condition are not infinite
2322 funsafe-loop-optimizations
2323 Common Report Var(flag_unsafe_loop_optimizations) Optimization
2324 Allow loop optimizations to assume that the loops behave in normal way
2325
2326 fassociative-math
2327 Common Report Var(flag_associative_math) SetByCombined
2328 Allow optimization for floating-point arithmetic which may change the
2329 result of the operation due to rounding.
2330
2331 freciprocal-math
2332 Common Report Var(flag_reciprocal_math) SetByCombined
2333 Same as -fassociative-math for expressions which include division.
2334
2335 ; Nonzero means that unsafe floating-point math optimizations are allowed
2336 ; for the sake of speed.  IEEE compliance is not guaranteed, and operations
2337 ; are allowed to assume that their arguments and results are "normal"
2338 ; (e.g., nonnegative for SQRT).
2339 funsafe-math-optimizations
2340 Common Report Var(flag_unsafe_math_optimizations) Optimization SetByCombined
2341 Allow math optimizations that may violate IEEE or ISO standards
2342
2343 funswitch-loops
2344 Common Report Var(flag_unswitch_loops) Optimization
2345 Perform loop unswitching
2346
2347 funwind-tables
2348 Common Report Var(flag_unwind_tables) Optimization
2349 Just generate unwind tables for exception handling
2350
2351 fuse-ld=bfd
2352 Common Driver Negative(fuse-ld=gold)
2353 Use the bfd linker instead of the default linker
2354
2355 fuse-ld=gold
2356 Common Driver Negative(fuse-ld=bfd)
2357 Use the gold linker instead of the default linker
2358
2359 fuse-linker-plugin
2360 Common Undocumented Var(flag_use_linker_plugin)
2361
2362 ; Positive if we should track variables, negative if we should run
2363 ; the var-tracking pass only to discard debug annotations, zero if
2364 ; we're not to run it.  When flag_var_tracking == 2 (AUTODETECT_VALUE) it
2365 ; will be set according to optimize, debug_info_level and debug_hooks
2366 ; in process_options ().
2367 fvar-tracking
2368 Common Report Var(flag_var_tracking) Init(2) Optimization
2369 Perform variable tracking
2370
2371 ; Positive if we should track variables at assignments, negative if
2372 ; we should run the var-tracking pass only to discard debug
2373 ; annotations.  When flag_var_tracking_assignments ==
2374 ; AUTODETECT_VALUE it will be set according to flag_var_tracking.
2375 fvar-tracking-assignments
2376 Common Report Var(flag_var_tracking_assignments) Init(2) Optimization
2377 Perform variable tracking by annotating assignments
2378
2379 ; Nonzero if we should toggle flag_var_tracking_assignments after
2380 ; processing options and computing its default.  */
2381 fvar-tracking-assignments-toggle
2382 Common Report Var(flag_var_tracking_assignments_toggle) Optimization
2383 Toggle -fvar-tracking-assignments
2384
2385 ; Positive if we should track uninitialized variables, negative if
2386 ; we should run the var-tracking pass only to discard debug
2387 ; annotations.  When flag_var_tracking_uninit == AUTODETECT_VALUE it
2388 ; will be set according to flag_var_tracking.
2389 fvar-tracking-uninit
2390 Common Report Var(flag_var_tracking_uninit) Optimization
2391 Perform variable tracking and also tag variables that are uninitialized
2392
2393 ftree-vectorize
2394 Common Report Var(flag_tree_vectorize) Optimization
2395 Enable vectorization on trees
2396
2397 ftree-vectorizer-verbose=
2398 Common Joined RejectNegative Ignore
2399 Does nothing.  Preserved for backward compatibility.
2400
2401 ftree-loop-vectorize
2402 Common Report Var(flag_tree_loop_vectorize) Optimization
2403 Enable loop vectorization on trees
2404
2405 ftree-slp-vectorize
2406 Common Report Var(flag_tree_slp_vectorize) Optimization
2407 Enable basic block vectorization (SLP) on trees
2408
2409 fvect-cost-model=
2410 Common Joined RejectNegative Enum(vect_cost_model) Var(flag_vect_cost_model) Init(VECT_COST_MODEL_DEFAULT)
2411 Specifies the cost model for vectorization
2412
2413 fsimd-cost-model=
2414 Common Joined RejectNegative Enum(vect_cost_model) Var(flag_simd_cost_model) Init(VECT_COST_MODEL_UNLIMITED)
2415 Specifies the vectorization cost model for code marked with a simd directive
2416
2417 Enum
2418 Name(vect_cost_model) Type(enum vect_cost_model) UnknownError(unknown vectorizer cost model %qs)
2419
2420 EnumValue
2421 Enum(vect_cost_model) String(unlimited) Value(VECT_COST_MODEL_UNLIMITED)
2422
2423 EnumValue
2424 Enum(vect_cost_model) String(dynamic) Value(VECT_COST_MODEL_DYNAMIC)
2425
2426 EnumValue
2427 Enum(vect_cost_model) String(cheap) Value(VECT_COST_MODEL_CHEAP)
2428
2429 fvect-cost-model
2430 Common RejectNegative Alias(fvect-cost-model=,dynamic)
2431 Enables the dynamic vectorizer cost model.  Preserved for backward compatibility.
2432
2433 fno-vect-cost-model
2434 Common RejectNegative Alias(fvect-cost-model=,unlimited)
2435 Enables the unlimited vectorizer cost model.  Preserved for backward compatibility.
2436
2437 ftree-vect-loop-version
2438 Common Ignore
2439 Does nothing. Preserved for backward compatibility.
2440
2441 ftree-scev-cprop
2442 Common Report Var(flag_tree_scev_cprop) Init(1) Optimization
2443 Enable copy propagation of scalar-evolution information.
2444
2445 ; -fverbose-asm causes extra commentary information to be produced in
2446 ; the generated assembly code (to make it more readable).  This option
2447 ; is generally only of use to those who actually need to read the
2448 ; generated assembly code (perhaps while debugging the compiler itself).
2449 ; -fno-verbose-asm, the default, causes the extra information
2450 ; to not be added and is useful when comparing two assembler files.
2451 fverbose-asm
2452 Common Report Var(flag_verbose_asm)
2453 Add extra commentary to assembler output
2454
2455 fvisibility=
2456 Common Joined RejectNegative Enum(symbol_visibility) Var(default_visibility) Init(VISIBILITY_DEFAULT)
2457 -fvisibility=[default|internal|hidden|protected]        Set the default symbol visibility
2458
2459 Enum
2460 Name(symbol_visibility) Type(enum symbol_visibility) UnknownError(unrecognized visibility value %qs)
2461
2462 EnumValue
2463 Enum(symbol_visibility) String(default) Value(VISIBILITY_DEFAULT)
2464
2465 EnumValue
2466 Enum(symbol_visibility) String(internal) Value(VISIBILITY_INTERNAL)
2467
2468 EnumValue
2469 Enum(symbol_visibility) String(hidden) Value(VISIBILITY_HIDDEN)
2470
2471 EnumValue
2472 Enum(symbol_visibility) String(protected) Value(VISIBILITY_PROTECTED)
2473
2474 fvtable-verify=
2475 Common Joined RejectNegative Enum(vtv_priority) Var(flag_vtable_verify) Init(VTV_NO_PRIORITY)
2476 Validate vtable pointers before using them.
2477
2478 Enum
2479 Name(vtv_priority) Type(enum vtv_priority) UnknownError(unknown vtable verify initialization priority %qs)
2480
2481 EnumValue
2482 Enum(vtv_priority) String(none) Value(VTV_NO_PRIORITY)
2483
2484 EnumValue
2485 Enum(vtv_priority) String(std) Value(VTV_STANDARD_PRIORITY)
2486
2487 EnumValue
2488 Enum(vtv_priority) String(preinit) Value(VTV_PREINIT_PRIORITY)
2489
2490 fvtv-counts
2491 Common Var(flag_vtv_counts)
2492 Output vtable verification counters.
2493
2494 fvtv-debug
2495 Common Var(flag_vtv_debug)
2496 Output vtable verification pointer sets information.
2497
2498 fvpt
2499 Common Report Var(flag_value_profile_transformations) Optimization
2500 Use expression value profiles in optimizations
2501
2502 fweb
2503 Common Report Var(flag_web) Init(2) Optimization
2504 Construct webs and split unrelated uses of single variable
2505
2506 ftree-builtin-call-dce
2507 Common Report Var(flag_tree_builtin_call_dce) Init(0) Optimization
2508 Enable conditional dead code elimination for builtin calls
2509
2510 fwhole-program
2511 Common Report Var(flag_whole_program) Init(0) Optimization
2512 Perform whole program optimizations
2513
2514 fwrapv
2515 Common Report Var(flag_wrapv) Optimization
2516 Assume signed arithmetic overflow wraps around
2517
2518 fzero-initialized-in-bss
2519 Common Report Var(flag_zero_initialized_in_bss) Init(1)
2520 Put zero initialized data in the bss section
2521
2522 g
2523 Common JoinedOrMissing
2524 Generate debug information in default format
2525
2526 gcoff
2527 Common JoinedOrMissing Negative(gdwarf)
2528 Generate debug information in COFF format
2529
2530 gdwarf
2531 Common JoinedOrMissing Negative(gdwarf-)
2532 Generate debug information in default version of DWARF format
2533
2534 gdwarf-
2535 Common Joined UInteger Var(dwarf_version) Init(4) Negative(gstabs)
2536 Generate debug information in DWARF v2 (or later) format
2537
2538 ggdb
2539 Common JoinedOrMissing
2540 Generate debug information in default extended format
2541
2542 gno-pubnames
2543 Common Negative(gpubnames) Var(debug_generate_pub_sections, 0) Init(-1)
2544 Don't generate DWARF pubnames and pubtypes sections.
2545
2546 gpubnames
2547 Common Negative(ggnu-pubnames) Var(debug_generate_pub_sections, 1)
2548 Generate DWARF pubnames and pubtypes sections.
2549
2550 ggnu-pubnames
2551 Common Negative(gno-pubnames) Var(debug_generate_pub_sections, 2)
2552 Generate DWARF pubnames and pubtypes sections with GNU extensions.
2553
2554 gno-record-gcc-switches
2555 Common RejectNegative Var(dwarf_record_gcc_switches,0) Init(1)
2556 Don't record gcc command line switches in DWARF DW_AT_producer.
2557
2558 grecord-gcc-switches
2559 Common RejectNegative Var(dwarf_record_gcc_switches,1)
2560 Record gcc command line switches in DWARF DW_AT_producer.
2561
2562 gno-split-dwarf
2563 Common Driver RejectNegative Var(dwarf_split_debug_info,0) Init(0)
2564 Don't generate debug information in separate .dwo files
2565
2566 gsplit-dwarf
2567 Common Driver RejectNegative Var(dwarf_split_debug_info,1)
2568 Generate debug information in separate .dwo files
2569
2570 gstabs
2571 Common JoinedOrMissing Negative(gstabs+)
2572 Generate debug information in STABS format
2573
2574 gstabs+
2575 Common JoinedOrMissing Negative(gvms)
2576 Generate debug information in extended STABS format
2577
2578 gno-strict-dwarf
2579 Common RejectNegative Var(dwarf_strict,0) Init(0)
2580 Emit DWARF additions beyond selected version
2581
2582 gstrict-dwarf
2583 Common Report RejectNegative Var(dwarf_strict,1)
2584 Don't emit DWARF additions beyond selected version
2585
2586 gtoggle
2587 Common Report Var(flag_gtoggle)
2588 Toggle debug information generation
2589
2590 gvms
2591 Common JoinedOrMissing Negative(gxcoff)
2592 Generate debug information in VMS format
2593
2594 gxcoff
2595 Common JoinedOrMissing Negative(gxcoff+)
2596 Generate debug information in XCOFF format
2597
2598 gxcoff+
2599 Common JoinedOrMissing Negative(gcoff)
2600 Generate debug information in extended XCOFF format
2601
2602 Enum
2603 Name(compressed_debug_sections) Type(int)
2604
2605 ; Since -gz= is completely handled in specs, the values aren't used and we
2606 ; assign arbitrary constants.
2607 EnumValue
2608 Enum(compressed_debug_sections) String(none) Value(0)
2609
2610 EnumValue
2611 Enum(compressed_debug_sections) String(zlib) Value(1)
2612
2613 EnumValue
2614 Enum(compressed_debug_sections) String(zlib-gnu) Value(2)
2615
2616 gz
2617 Common Driver
2618 Generate compressed debug sections
2619
2620 gz=
2621 Common Driver Joined Enum(compressed_debug_sections)
2622 -gz=<format>    Generate compressed debug sections in format <format>
2623
2624 h
2625 Driver Joined Separate
2626
2627 iplugindir=
2628 Common Joined Var(plugindir_string) Init(0)
2629 -iplugindir=<dir>       Set <dir> to be the default plugin directory
2630
2631 imultiarch
2632 Common Joined Separate RejectDriver Var(imultiarch) Init(0)
2633 -imultiarch <dir>       Set <dir> to be the multiarch include subdirectory
2634
2635 l
2636 Driver Joined Separate
2637
2638 n
2639 Driver
2640
2641 no-canonical-prefixes
2642 Driver
2643
2644 nodefaultlibs
2645 Driver
2646
2647 nostartfiles
2648 Driver
2649
2650 nostdlib
2651 Driver
2652
2653 o
2654 Common Driver Joined Separate Var(asm_file_name) MissingArgError(missing filename after %qs)
2655 -o <file>       Place output into <file>
2656
2657 p
2658 Common Var(profile_flag)
2659 Enable function profiling
2660
2661 pass-exit-codes
2662 Driver Var(pass_exit_codes)
2663
2664 pedantic
2665 Common Alias(Wpedantic)
2666
2667 pedantic-errors
2668 Common Var(flag_pedantic_errors)
2669 Like -pedantic but issue them as errors
2670
2671 pg
2672 Driver
2673
2674 pipe
2675 Driver Var(use_pipes)
2676
2677 print-file-name=
2678 Driver JoinedOrMissing Var(print_file_name)
2679
2680 print-libgcc-file-name
2681 Driver
2682
2683 print-multi-directory
2684 Driver Var(print_multi_directory)
2685
2686 print-multi-lib
2687 Driver Var(print_multi_lib)
2688
2689 print-multi-os-directory
2690 Driver Var(print_multi_os_directory)
2691
2692 print-multiarch
2693 Driver Var(print_multiarch)
2694
2695 print-prog-name=
2696 Driver JoinedOrMissing Var(print_prog_name)
2697
2698 print-search-dirs
2699 Driver Var(print_search_dirs)
2700
2701 print-sysroot
2702 Driver Var(print_sysroot)
2703
2704 print-sysroot-headers-suffix
2705 Driver Var(print_sysroot_headers_suffix)
2706
2707 quiet
2708 Common Var(quiet_flag) RejectDriver
2709 Do not display functions compiled or elapsed time
2710
2711 r
2712 Driver
2713
2714 s
2715 Driver
2716
2717 save-temps
2718 Driver
2719
2720 save-temps=
2721 Driver Joined
2722
2723 t
2724 Driver
2725
2726 time
2727 Driver Var(report_times)
2728
2729 time=
2730 Driver JoinedOrMissing
2731
2732 u
2733 Driver Joined Separate
2734
2735 undef
2736 Driver
2737 ; C option, but driver must not handle as "-u ndef".
2738
2739 v
2740 Common Driver Var(verbose_flag)
2741 Enable verbose output
2742
2743 version
2744 Common Var(version_flag) RejectDriver
2745 Display the compiler's version
2746
2747 w
2748 Common Var(inhibit_warnings)
2749 Suppress warnings
2750
2751 wrapper
2752 Driver Separate Var(wrapper_string)
2753
2754 x
2755 Driver Joined Separate
2756
2757 shared
2758 Driver RejectNegative Negative(pie)
2759 Create a shared library
2760
2761 shared-libgcc
2762 Driver
2763
2764 specs
2765 Driver Separate Alias(specs=)
2766
2767 specs=
2768 Driver Joined
2769
2770 static
2771 Driver
2772
2773 static-libgcc
2774 Driver
2775
2776 static-libgfortran
2777 Driver
2778 ; Documented for Fortran, but always accepted by driver.
2779
2780 static-libstdc++
2781 Driver
2782
2783 static-libgo
2784 Driver
2785 ; Documented for Go, but always accepted by driver.
2786
2787 static-libasan
2788 Driver
2789
2790 static-libtsan
2791 Driver
2792
2793 static-liblsan
2794 Driver
2795
2796 static-libubsan
2797 Driver
2798
2799 symbolic
2800 Driver
2801
2802 pie
2803 Driver RejectNegative Negative(shared)
2804 Create a position independent executable
2805
2806 z
2807 Driver Joined Separate
2808
2809 fuse-caller-save
2810 Common Report Var(flag_use_caller_save) Optimization
2811 Use caller save register across calls if possible
2812
2813 ; This comment is to ensure we retain the blank line above.