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