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 fdump-passes
1124 Common Var(flag_dump_passes) Init(0)
1125 Dump optimization passes
1126
1127 fdump-unnumbered
1128 Common Report Var(flag_dump_unnumbered)
1129 Suppress output of instruction numbers, line number notes and addresses in debugging dumps
1130
1131 fdump-unnumbered-links
1132 Common Report Var(flag_dump_unnumbered_links)
1133 Suppress output of previous and next insn numbers in debugging dumps
1134
1135 fdwarf2-cfi-asm
1136 Common Report Var(flag_dwarf2_cfi_asm) Init(HAVE_GAS_CFI_DIRECTIVE)
1137 Enable CFI tables via GAS assembler directives.
1138
1139 fearly-inlining
1140 Common Report Var(flag_early_inlining) Init(1) Optimization
1141 Perform early inlining
1142
1143 feliminate-dwarf2-dups
1144 Common Report Var(flag_eliminate_dwarf2_dups)
1145 Perform DWARF2 duplicate elimination
1146
1147 fipa-sra
1148 Common Report Var(flag_ipa_sra) Init(0) Optimization
1149 Perform interprocedural reduction of aggregates
1150
1151 feliminate-unused-debug-symbols
1152 Common Report Var(flag_debug_only_used_symbols)
1153 Perform unused type elimination in debug info
1154
1155 feliminate-unused-debug-types
1156 Common Report Var(flag_eliminate_unused_debug_types) Init(1)
1157 Perform unused type elimination in debug info
1158
1159 femit-class-debug-always
1160 Common Report Var(flag_emit_class_debug_always) Init(0)
1161 Do not suppress C++ class debug information.
1162
1163 fexceptions
1164 Common Report Var(flag_exceptions) Optimization
1165 Enable exception handling
1166
1167 fexpensive-optimizations
1168 Common Report Var(flag_expensive_optimizations) Optimization
1169 Perform a number of minor, expensive optimizations
1170
1171 fexcess-precision=
1172 Common Joined RejectNegative Enum(excess_precision) Var(flag_excess_precision_cmdline) Init(EXCESS_PRECISION_DEFAULT)
1173 -fexcess-precision=[fast|standard]      Specify handling of excess floating-point precision
1174
1175 Enum
1176 Name(excess_precision) Type(enum excess_precision) UnknownError(unknown excess precision style %qs)
1177
1178 EnumValue
1179 Enum(excess_precision) String(fast) Value(EXCESS_PRECISION_FAST)
1180
1181 EnumValue
1182 Enum(excess_precision) String(standard) Value(EXCESS_PRECISION_STANDARD)
1183
1184 ffast-math
1185 Common
1186
1187 ffat-lto-objects
1188 Common Var(flag_fat_lto_objects)
1189 Output lto objects containing both the intermediate language and binary output.
1190
1191 ffinite-math-only
1192 Common Report Var(flag_finite_math_only) Optimization SetByCombined
1193 Assume no NaNs or infinities are generated
1194
1195 ffixed-
1196 Common Joined RejectNegative Var(common_deferred_options) Defer
1197 -ffixed-<register>      Mark <register> as being unavailable to the compiler
1198
1199 ffloat-store
1200 Common Report Var(flag_float_store) Optimization
1201 Don't allocate floats and doubles in extended-precision registers
1202
1203 fforce-addr
1204 Common Ignore
1205 Does nothing.  Preserved for backward compatibility.
1206
1207 fforward-propagate
1208 Common Report Var(flag_forward_propagate) Optimization
1209 Perform a forward propagation pass on RTL
1210
1211 ffp-contract=
1212 Common Joined RejectNegative Enum(fp_contract_mode) Var(flag_fp_contract_mode) Init(FP_CONTRACT_FAST)
1213 -ffp-contract=[off|on|fast] Perform floating-point expression contraction.
1214
1215 Enum
1216 Name(fp_contract_mode) Type(enum fp_contract_mode) UnknownError(unknown floating point contraction style %qs)
1217
1218 EnumValue
1219 Enum(fp_contract_mode) String(off) Value(FP_CONTRACT_OFF)
1220
1221 ; Not implemented, fall back to conservative FP_CONTRACT_OFF.
1222 EnumValue
1223 Enum(fp_contract_mode) String(on) Value(FP_CONTRACT_OFF)
1224
1225 EnumValue
1226 Enum(fp_contract_mode) String(fast) Value(FP_CONTRACT_FAST)
1227
1228 ; Nonzero means don't put addresses of constant functions in registers.
1229 ; Used for compiling the Unix kernel, where strange substitutions are
1230 ; done on the assembly output.
1231 ffunction-cse
1232 Common Report Var(flag_no_function_cse,0)
1233 Allow function addresses to be held in registers
1234
1235 ffunction-sections
1236 Common Report Var(flag_function_sections)
1237 Place each function into its own section
1238
1239 fgcse
1240 Common Report Var(flag_gcse) Optimization
1241 Perform global common subexpression elimination
1242
1243 fgcse-lm
1244 Common Report Var(flag_gcse_lm) Init(1) Optimization
1245 Perform enhanced load motion during global common subexpression elimination
1246
1247 fgcse-sm
1248 Common Report Var(flag_gcse_sm) Init(0) Optimization
1249 Perform store motion after global common subexpression elimination
1250
1251 fgcse-las
1252 Common Report Var(flag_gcse_las) Init(0) Optimization
1253 Perform redundant load after store elimination in global common subexpression
1254 elimination
1255
1256 fgcse-after-reload
1257 Common Report Var(flag_gcse_after_reload) Optimization
1258 Perform global common subexpression elimination after register allocation
1259 has finished
1260
1261 ; This option is not documented yet as its semantics will change.
1262 fgraphite
1263 Common Report Var(flag_graphite)
1264 Enable in and out of Graphite representation
1265
1266 fgraphite-identity
1267 Common Report Var(flag_graphite_identity) Optimization
1268 Enable Graphite Identity transformation
1269
1270 fgraphite-code-generator=
1271 Common Report RejectNegative Joined Optimization Enum(fgraphite_generator) Var(flag_graphite_code_gen) Init(FGRAPHITE_CODE_GEN_ISL)
1272 Choose code generator of Graphite
1273
1274 Enum
1275 Name(fgraphite_generator) Type(enum fgraphite_generator) UnknownError(unknown code generator of graphite %qs)
1276
1277 EnumValue
1278 Enum(fgraphite_generator) String(isl) Value(FGRAPHITE_CODE_GEN_ISL)
1279
1280 EnumValue
1281 Enum(fgraphite_generator) String(cloog) Value(FGRAPHITE_CODE_GEN_CLOOG)
1282
1283 fhoist-adjacent-loads
1284 Common Report Var(flag_hoist_adjacent_loads) Optimization
1285 Enable hoisting adjacent loads to encourage generating conditional move
1286 instructions
1287
1288 floop-parallelize-all
1289 Common Report Var(flag_loop_parallelize_all) Optimization
1290 Mark all loops as parallel
1291
1292 floop-strip-mine
1293 Common Report Var(flag_loop_strip_mine) Optimization
1294 Enable Loop Strip Mining transformation
1295
1296 floop-interchange
1297 Common Report Var(flag_loop_interchange) Optimization
1298 Enable Loop Interchange transformation
1299
1300 floop-block
1301 Common Report Var(flag_loop_block) Optimization
1302 Enable Loop Blocking transformation
1303
1304 fgnu-tm
1305 Common Report Var(flag_tm)
1306 Enable support for GNU transactional memory
1307
1308 fgnu-unique
1309 Common Report Var(flag_gnu_unique) Init(1)
1310 Use STB_GNU_UNIQUE if supported by the assembler
1311
1312 floop-flatten
1313 Common Ignore
1314 Does nothing. Preserved for backward compatibility.
1315
1316 floop-nest-optimize
1317 Common Report Var(flag_loop_optimize_isl) Optimization
1318 Enable the ISL based loop nest optimizer
1319
1320 fstrict-volatile-bitfields
1321 Common Report Var(flag_strict_volatile_bitfields) Init(-1)
1322 Force bitfield accesses to match their type width
1323
1324 fguess-branch-probability
1325 Common Report Var(flag_guess_branch_prob) Optimization
1326 Enable guessing of branch probabilities
1327
1328 ; Nonzero means ignore `#ident' directives.  0 means handle them.
1329 ; Generate position-independent code for executables if possible
1330 ; On SVR4 targets, it also controls whether or not to emit a
1331 ; string identifying the compiler.
1332 fident
1333 Common Report Var(flag_no_ident,0)
1334 Process #ident directives
1335
1336 fif-conversion
1337 Common Report Var(flag_if_conversion) Optimization
1338 Perform conversion of conditional jumps to branchless equivalents
1339
1340 fif-conversion2
1341 Common Report Var(flag_if_conversion2) Optimization
1342 Perform conversion of conditional jumps to conditional execution
1343
1344 fstack-reuse=
1345 Common Joined RejectNegative Enum(stack_reuse_level) Var(flag_stack_reuse) Init(SR_ALL)
1346 -fstack-reuse=[all|named_vars|none] Set stack reuse level for local variables.
1347
1348 Enum
1349 Name(stack_reuse_level) Type(enum stack_reuse_level) UnknownError(unknown Stack Reuse Level %qs)
1350
1351 EnumValue
1352 Enum(stack_reuse_level) String(all) Value(SR_ALL)
1353
1354 EnumValue
1355 Enum(stack_reuse_level) String(named_vars) Value(SR_NAMED_VARS)
1356
1357 EnumValue
1358 Enum(stack_reuse_level) String(none) Value(SR_NONE)
1359
1360 ftree-loop-if-convert
1361 Common Report Var(flag_tree_loop_if_convert) Init(-1) Optimization
1362 Convert conditional jumps in innermost loops to branchless equivalents
1363
1364 ftree-loop-if-convert-stores
1365 Common Report Var(flag_tree_loop_if_convert_stores) Optimization
1366 Also if-convert conditional jumps containing memory writes
1367
1368 ; -finhibit-size-directive inhibits output of .size for ELF.
1369 ; This is used only for compiling crtstuff.c,
1370 ; and it may be extended to other effects
1371 ; needed for crtstuff.c on other systems.
1372 finhibit-size-directive
1373 Common Report Var(flag_inhibit_size_directive)
1374 Do not generate .size directives
1375
1376 findirect-inlining
1377 Common Report Var(flag_indirect_inlining)
1378 Perform indirect inlining
1379
1380 ; General flag to enable inlining.  Specifying -fno-inline will disable
1381 ; all inlining apart from always-inline functions.
1382 finline
1383 Common Report Var(flag_no_inline,0) Init(0) Optimization
1384 Enable inlining of function declared \"inline\", disabling disables all inlining
1385
1386 finline-small-functions
1387 Common Report Var(flag_inline_small_functions) Optimization
1388 Integrate functions into their callers when code size is known not to grow
1389
1390 finline-functions
1391 Common Report Var(flag_inline_functions) Optimization
1392 Integrate functions not declared \"inline\" into their callers when profitable
1393
1394 finline-functions-called-once
1395 Common Report Var(flag_inline_functions_called_once) Optimization
1396 Integrate functions only required by their single caller
1397
1398 finline-limit-
1399 Common RejectNegative Joined Alias(finline-limit=)
1400
1401 finline-limit=
1402 Common RejectNegative Joined UInteger
1403 -finline-limit=<number> Limit the size of inlined functions to <number>
1404
1405 finline-atomics
1406 Common Report Var(flag_inline_atomics) Init(1) Optimization
1407 Inline __atomic operations when a lock free instruction sequence is available.
1408
1409 finstrument-functions
1410 Common Report Var(flag_instrument_function_entry_exit)
1411 Instrument function entry and exit with profiling calls
1412
1413 finstrument-functions-exclude-function-list=
1414 Common RejectNegative Joined
1415 -finstrument-functions-exclude-function-list=name,...  Do not instrument listed functions
1416
1417 finstrument-functions-exclude-file-list=
1418 Common RejectNegative Joined
1419 -finstrument-functions-exclude-file-list=filename,...  Do not instrument functions listed in files
1420
1421 fipa-cp
1422 Common Report Var(flag_ipa_cp) Optimization
1423 Perform interprocedural constant propagation
1424
1425 fipa-cp-clone
1426 Common Report Var(flag_ipa_cp_clone) Optimization
1427 Perform cloning to make Interprocedural constant propagation stronger
1428
1429 fipa-profile
1430 Common Report Var(flag_ipa_profile) Init(0) Optimization
1431 Perform interprocedural profile propagation
1432
1433 fipa-pta
1434 Common Report Var(flag_ipa_pta) Init(0) Optimization
1435 Perform interprocedural points-to analysis
1436
1437 fipa-pure-const
1438 Common Report Var(flag_ipa_pure_const) Init(0) Optimization
1439 Discover pure and const functions
1440
1441 fipa-reference
1442 Common Report Var(flag_ipa_reference) Init(0) Optimization
1443 Discover readonly and non addressable static variables
1444
1445 fipa-matrix-reorg
1446 Common Ignore
1447 Does nothing. Preserved for backward compatibility.
1448
1449 fipa-struct-reorg
1450 Common Ignore
1451 Does nothing. Preserved for backward compatibility.
1452
1453 fira-algorithm=
1454 Common Joined RejectNegative Enum(ira_algorithm) Var(flag_ira_algorithm) Init(IRA_ALGORITHM_CB)
1455 -fira-algorithm=[CB|priority] Set the used IRA algorithm
1456
1457 Enum
1458 Name(ira_algorithm) Type(enum ira_algorithm) UnknownError(unknown IRA algorithm %qs)
1459
1460 EnumValue
1461 Enum(ira_algorithm) String(CB) Value(IRA_ALGORITHM_CB)
1462
1463 EnumValue
1464 Enum(ira_algorithm) String(priority) Value(IRA_ALGORITHM_PRIORITY)
1465
1466 fira-region=
1467 Common Joined RejectNegative Enum(ira_region) Var(flag_ira_region) Init(IRA_REGION_AUTODETECT)
1468 -fira-region=[one|all|mixed] Set regions for IRA
1469
1470 Enum
1471 Name(ira_region) Type(enum ira_region) UnknownError(unknown IRA region %qs)
1472
1473 EnumValue
1474 Enum(ira_region) String(one) Value(IRA_REGION_ONE)
1475
1476 EnumValue
1477 Enum(ira_region) String(all) Value(IRA_REGION_ALL)
1478
1479 EnumValue
1480 Enum(ira_region) String(mixed) Value(IRA_REGION_MIXED)
1481
1482 fira-hoist-pressure
1483 Common Report Var(flag_ira_hoist_pressure) Init(1) Optimization
1484 Use IRA based register pressure calculation
1485 in RTL hoist optimizations.
1486
1487 fira-loop-pressure
1488 Common Report Var(flag_ira_loop_pressure) Optimization
1489 Use IRA based register pressure calculation
1490 in RTL loop optimizations.
1491
1492 fira-share-save-slots
1493 Common Report Var(flag_ira_share_save_slots) Init(1)
1494 Share slots for saving different hard registers.
1495
1496 fira-share-spill-slots
1497 Common Report Var(flag_ira_share_spill_slots) Init(1)
1498 Share stack slots for spilled pseudo-registers.
1499
1500 fira-verbose=
1501 Common RejectNegative Joined UInteger Var(flag_ira_verbose) Init(5)
1502 -fira-verbose=<number>  Control IRA's level of diagnostic messages.
1503
1504 fivopts
1505 Common Report Var(flag_ivopts) Init(1) Optimization
1506 Optimize induction variables on trees
1507
1508 fjump-tables
1509 Common Var(flag_jump_tables) Init(1) Optimization
1510 Use jump tables for sufficiently large switch statements
1511
1512 fkeep-inline-functions
1513 Common Report Var(flag_keep_inline_functions)
1514 Generate code for functions even if they are fully inlined
1515
1516 fkeep-static-consts
1517 Common Report Var(flag_keep_static_consts) Init(1)
1518 Emit static const variables even if they are not used
1519
1520 fleading-underscore
1521 Common Report Var(flag_leading_underscore) Init(-1)
1522 Give external symbols a leading underscore
1523
1524 floop-optimize
1525 Common Ignore
1526 Does nothing.  Preserved for backward compatibility.
1527
1528 flto
1529 Common
1530 Enable link-time optimization.
1531
1532 flto=
1533 Common RejectNegative Joined Var(flag_lto)
1534 Link-time optimization with number of parallel jobs or jobserver.
1535
1536 Enum
1537 Name(lto_partition_model) Type(enum lto_partition_model) UnknownError(unknown LTO partitioning model %qs)
1538
1539 EnumValue
1540 Enum(lto_partition_model) String(none) Value(LTO_PARTITION_NONE)
1541
1542 EnumValue
1543 Enum(lto_partition_model) String(one) Value(LTO_PARTITION_ONE)
1544
1545 EnumValue
1546 Enum(lto_partition_model) String(balanced) Value(LTO_PARTITION_BALANCED)
1547
1548 EnumValue
1549 Enum(lto_partition_model) String(1to1) Value(LTO_PARTITION_1TO1)
1550
1551 EnumValue
1552 Enum(lto_partition_model) String(max) Value(LTO_PARTITION_MAX)
1553
1554 flto-partition=
1555 Common Joined RejectNegative Enum(lto_partition_model) Var(flag_lto_partition) Init(LTO_PARTITION_BALANCED)
1556 Specify the algorithm to partition symbols and vars at linktime
1557
1558 ; The initial value of -1 comes from Z_DEFAULT_COMPRESSION in zlib.h.
1559 flto-compression-level=
1560 Common Joined RejectNegative UInteger Var(flag_lto_compression_level) Init(-1)
1561 -flto-compression-level=<number>        Use zlib compression level <number> for IL
1562
1563 flto-odr-type-merging
1564 Common Report Var(flag_lto_odr_type_mering) Init(1)
1565 Merge C++ types using One Definition Rule
1566
1567 flto-report
1568 Common Report Var(flag_lto_report) Init(0)
1569 Report various link-time optimization statistics
1570
1571 flto-report-wpa
1572 Common Report Var(flag_lto_report_wpa) Init(0)
1573 Report various link-time optimization statistics for WPA only
1574
1575 fmath-errno
1576 Common Report Var(flag_errno_math) Init(1) Optimization SetByCombined
1577 Set errno after built-in math functions
1578
1579 fmax-errors=
1580 Common Joined RejectNegative UInteger Var(flag_max_errors)
1581 -fmax-errors=<number>   Maximum number of errors to report
1582
1583 fmem-report
1584 Common Report Var(mem_report)
1585 Report on permanent memory allocation
1586
1587 fmem-report-wpa
1588 Common Report Var(mem_report_wpa)
1589 Report on permanent memory allocation in WPA only
1590
1591 ; This will attempt to merge constant section constants, if 1 only
1592 ; string constants and constants from constant pool, if 2 also constant
1593 ; variables.
1594 fmerge-all-constants
1595 Common Report Var(flag_merge_constants,2) Init(1) Optimization
1596 Attempt to merge identical constants and constant variables
1597
1598 fmerge-constants
1599 Common Report Var(flag_merge_constants,1) Optimization
1600 Attempt to merge identical constants across compilation units
1601
1602 fmerge-debug-strings
1603 Common Report Var(flag_merge_debug_strings) Init(1)
1604 Attempt to merge identical debug strings across compilation units
1605
1606 fmessage-length=
1607 Common RejectNegative Joined UInteger
1608 -fmessage-length=<number>       Limit diagnostics to <number> characters per line.  0 suppresses line-wrapping
1609
1610 fmodulo-sched
1611 Common Report Var(flag_modulo_sched) Optimization
1612 Perform SMS based modulo scheduling before the first scheduling pass
1613
1614 fmodulo-sched-allow-regmoves
1615 Common Report Var(flag_modulo_sched_allow_regmoves)
1616 Perform SMS based modulo scheduling with register moves allowed
1617
1618 fmove-loop-invariants
1619 Common Report Var(flag_move_loop_invariants) Optimization
1620 Move loop invariant computations out of loops
1621
1622 fdce
1623 Common Var(flag_dce) Init(1) Optimization
1624 Use the RTL dead code elimination pass
1625
1626 fdse
1627 Common Var(flag_dse) Init(1) Optimization
1628 Use the RTL dead store elimination pass
1629
1630 freschedule-modulo-scheduled-loops
1631 Common Report Var(flag_resched_modulo_sched) Optimization
1632 Enable/Disable the traditional scheduling in loops that already passed modulo scheduling
1633
1634 fnon-call-exceptions
1635 Common Report Var(flag_non_call_exceptions) Optimization
1636 Support synchronous non-call exceptions
1637
1638 fomit-frame-pointer
1639 Common Report Var(flag_omit_frame_pointer) Optimization
1640 When possible do not generate stack frames
1641
1642 fopt-info
1643 Common Report Var(flag_opt_info) Optimization
1644 Enable all optimization info dumps on stderr
1645
1646 fopt-info-
1647 Common Joined RejectNegative Var(common_deferred_options) Defer
1648 -fopt-info[-<type>=filename]    Dump compiler optimization details
1649
1650 foptimize-register-move
1651 Common Ignore
1652 Does nothing. Preserved for backward compatibility.
1653
1654 foptimize-sibling-calls
1655 Common Report Var(flag_optimize_sibling_calls) Optimization
1656 Optimize sibling and tail recursive calls
1657
1658 fpartial-inlining
1659 Common Report Var(flag_partial_inlining)
1660 Perform partial inlining
1661
1662 fpre-ipa-mem-report
1663 Common Report Var(pre_ipa_mem_report)
1664 Report on memory allocation before interprocedural optimization
1665
1666 fpost-ipa-mem-report
1667 Common Report Var(post_ipa_mem_report)
1668 Report on memory allocation before interprocedural optimization
1669
1670 fpack-struct
1671 Common Report Var(flag_pack_struct) Optimization
1672 Pack structure members together without holes
1673
1674 fpack-struct=
1675 Common RejectNegative Joined UInteger Optimization
1676 -fpack-struct=<number>  Set initial maximum structure member alignment
1677
1678 fpcc-struct-return
1679 Common Report Var(flag_pcc_struct_return,1) Init(DEFAULT_PCC_STRUCT_RETURN)
1680 Return small aggregates in memory, not registers
1681
1682 fpeel-loops
1683 Common Report Var(flag_peel_loops) Optimization
1684 Perform loop peeling
1685
1686 fpeephole
1687 Common Report Var(flag_no_peephole,0) Optimization
1688 Enable machine specific peephole optimizations
1689
1690 fpeephole2
1691 Common Report Var(flag_peephole2) Optimization
1692 Enable an RTL peephole pass before sched2
1693
1694 fPIC
1695 Common Report Var(flag_pic,2) Negative(fPIE)
1696 Generate position-independent code if possible (large mode)
1697
1698 fPIE
1699 Common Report Var(flag_pie,2) Negative(fpic)
1700 Generate position-independent code for executables if possible (large mode)
1701
1702 fpic
1703 Common Report Var(flag_pic,1) Negative(fpie)
1704 Generate position-independent code if possible (small mode)
1705
1706 fpie
1707 Common Report Var(flag_pie,1) Negative(fPIC)
1708 Generate position-independent code for executables if possible (small mode)
1709
1710 fplugin=
1711 Common Joined RejectNegative Var(common_deferred_options) Defer
1712 Specify a plugin to load
1713
1714 fplugin-arg-
1715 Common Joined RejectNegative Var(common_deferred_options) Defer
1716 -fplugin-arg-<name>-<key>[=<value>]     Specify argument <key>=<value> for plugin <name>
1717
1718 fpredictive-commoning
1719 Common Report Var(flag_predictive_commoning) Optimization
1720 Run predictive commoning optimization.
1721
1722 fprefetch-loop-arrays
1723 Common Report Var(flag_prefetch_loop_arrays) Init(-1) Optimization
1724 Generate prefetch instructions, if available, for arrays in loops
1725
1726 fprofile
1727 Common Report Var(profile_flag)
1728 Enable basic program profiling code
1729
1730 fprofile-arcs
1731 Common Report Var(profile_arc_flag)
1732 Insert arc-based program profiling code
1733
1734 fprofile-dir=
1735 Common Joined RejectNegative Var(profile_data_prefix)
1736 Set the top-level directory for storing the profile data.
1737 The default is 'pwd'.
1738
1739 fprofile-correction
1740 Common Report Var(flag_profile_correction)
1741 Enable correction of flow inconsistent profile data input
1742
1743 fprofile-generate
1744 Common
1745 Enable common options for generating profile info for profile feedback directed optimizations
1746
1747 fprofile-generate=
1748 Common Joined RejectNegative
1749 Enable common options for generating profile info for profile feedback directed optimizations, and set -fprofile-dir=
1750
1751 fprofile-use
1752 Common Var(flag_profile_use)
1753 Enable common options for performing profile feedback directed optimizations
1754
1755 fprofile-use=
1756 Common Joined RejectNegative
1757 Enable common options for performing profile feedback directed optimizations, and set -fprofile-dir=
1758
1759 fprofile-values
1760 Common Report Var(flag_profile_values)
1761 Insert code to profile values of expressions
1762
1763 fprofile-report
1764 Common Report Var(profile_report)
1765 Report on consistency of profile
1766
1767 fprofile-reorder-functions
1768 Common Report Var(flag_profile_reorder_functions)
1769 Enable function reordering that improves code placement
1770
1771 frandom-seed
1772 Common Var(common_deferred_options) Defer
1773
1774 frandom-seed=
1775 Common Joined RejectNegative Var(common_deferred_options) Defer
1776 -frandom-seed=<string>  Make compile reproducible using <string>
1777
1778 ; This switch causes the command line that was used to create an
1779 ; object file to be recorded into the object file.  The exact format
1780 ; of this recording is target and binary file format dependent.
1781 ; It is related to the -fverbose-asm switch, but that switch only
1782 ; records information in the assembler output file as comments, so
1783 ; they never reach the object file.
1784 frecord-gcc-switches
1785 Common Report Var(flag_record_gcc_switches)
1786 Record gcc command line switches in the object file.
1787
1788 freg-struct-return
1789 Common Report Var(flag_pcc_struct_return,0) Optimization
1790 Return small aggregates in registers
1791
1792 fregmove
1793 Common Ignore
1794 Does nothing. Preserved for backward compatibility.
1795
1796 flive-range-shrinkage
1797 Common Report Var(flag_live_range_shrinkage) Init(0) Optimization
1798 Relief of register pressure through live range shrinkage
1799
1800 frename-registers
1801 Common Report Var(flag_rename_registers) Init(2) Optimization
1802 Perform a register renaming optimization pass
1803
1804 freorder-blocks
1805 Common Report Var(flag_reorder_blocks) Optimization
1806 Reorder basic blocks to improve code placement
1807
1808 freorder-blocks-and-partition
1809 Common Report Var(flag_reorder_blocks_and_partition) Optimization
1810 Reorder basic blocks and partition into hot and cold sections
1811
1812 freorder-functions
1813 Common Report Var(flag_reorder_functions) Optimization
1814 Reorder functions to improve code placement
1815
1816 frerun-cse-after-loop
1817 Common Report Var(flag_rerun_cse_after_loop) Optimization
1818 Add a common subexpression elimination pass after loop optimizations
1819
1820 frerun-loop-opt
1821 Common Ignore
1822 Does nothing.  Preserved for backward compatibility.
1823
1824 frounding-math
1825 Common Report Var(flag_rounding_math) Optimization SetByCombined
1826 Disable optimizations that assume default FP rounding behavior
1827
1828 fsched-interblock
1829 Common Report Var(flag_schedule_interblock) Init(1) Optimization
1830 Enable scheduling across basic blocks
1831
1832 fsched-pressure
1833 Common Report Var(flag_sched_pressure) Init(0) Optimization
1834 Enable register pressure sensitive insn scheduling
1835
1836 fsched-spec
1837 Common Report Var(flag_schedule_speculative) Init(1) Optimization
1838 Allow speculative motion of non-loads
1839
1840 fsched-spec-load
1841 Common Report Var(flag_schedule_speculative_load) Optimization
1842 Allow speculative motion of some loads
1843
1844 fsched-spec-load-dangerous
1845 Common Report Var(flag_schedule_speculative_load_dangerous) Optimization
1846 Allow speculative motion of more loads
1847
1848 fsched-verbose=
1849 Common RejectNegative Joined UInteger Var(sched_verbose_param)
1850 -fsched-verbose=<number>        Set the verbosity level of the scheduler
1851
1852 fsched2-use-superblocks
1853 Common Report Var(flag_sched2_use_superblocks) Optimization
1854 If scheduling post reload, do superblock scheduling
1855
1856 fsched2-use-traces
1857 Common Ignore
1858 Does nothing.  Preserved for backward compatibility.
1859
1860 fschedule-insns
1861 Common Report Var(flag_schedule_insns) Optimization
1862 Reschedule instructions before register allocation
1863
1864 fschedule-insns2
1865 Common Report Var(flag_schedule_insns_after_reload) Optimization
1866 Reschedule instructions after register allocation
1867
1868 ; This flag should be on when a target implements non-trivial
1869 ; scheduling hooks, maybe saving some information for its own sake.
1870 ; On IA64, for example, this is used for correct bundling.
1871 fselective-scheduling
1872 Common Report Var(flag_selective_scheduling) Optimization
1873 Schedule instructions using selective scheduling algorithm
1874
1875 fselective-scheduling2
1876 Common Report Var(flag_selective_scheduling2) Optimization
1877 Run selective scheduling after reload
1878
1879 fsel-sched-pipelining
1880 Common Report Var(flag_sel_sched_pipelining) Init(0) Optimization
1881 Perform software pipelining of inner loops during selective scheduling
1882
1883 fsel-sched-pipelining-outer-loops
1884 Common Report Var(flag_sel_sched_pipelining_outer_loops) Init(0) Optimization
1885 Perform software pipelining of outer loops during selective scheduling
1886
1887 fsel-sched-reschedule-pipelined
1888 Common Report Var(flag_sel_sched_reschedule_pipelined) Init(0) Optimization
1889 Reschedule pipelined regions without pipelining
1890
1891 fsemantic-interposition
1892 Common Report Var(flag_semantic_interposition) Init(1)
1893 Allow interposing function (or variables) by ones with different semantics (or initializer) respectively by dynamic linker
1894
1895 ; sched_stalled_insns means that insns can be moved prematurely from the queue
1896 ; of stalled insns into the ready list.
1897 fsched-stalled-insns
1898 Common Report Var(flag_sched_stalled_insns) Optimization UInteger
1899 Allow premature scheduling of queued insns
1900
1901 fsched-stalled-insns=
1902 Common RejectNegative Joined UInteger
1903 -fsched-stalled-insns=<number>  Set number of queued insns that can be prematurely scheduled
1904
1905 ; sched_stalled_insns_dep controls how many recently scheduled cycles will
1906 ; be examined for a dependency on a stalled insn that is candidate for
1907 ; premature removal from the queue of stalled insns into the ready list (has
1908 ; an effect only if the flag 'sched_stalled_insns' is set).
1909 fsched-stalled-insns-dep
1910 Common Report Var(flag_sched_stalled_insns_dep,1) Init(1) Optimization UInteger
1911 Set dependence distance checking in premature scheduling of queued insns
1912
1913 fsched-stalled-insns-dep=
1914 Common RejectNegative Joined UInteger
1915 -fsched-stalled-insns-dep=<number>      Set dependence distance checking in premature scheduling of queued insns
1916
1917 fsched-group-heuristic
1918 Common Report Var(flag_sched_group_heuristic) Init(1) Optimization
1919 Enable the group heuristic in the scheduler
1920
1921 fsched-critical-path-heuristic
1922 Common Report Var(flag_sched_critical_path_heuristic) Init(1) Optimization
1923 Enable the critical path heuristic in the scheduler
1924
1925 fsched-spec-insn-heuristic
1926 Common Report Var(flag_sched_spec_insn_heuristic) Init(1) Optimization
1927 Enable the speculative instruction heuristic in the scheduler
1928
1929 fsched-rank-heuristic
1930 Common Report Var(flag_sched_rank_heuristic) Init(1) Optimization
1931 Enable the rank heuristic in the scheduler
1932
1933 fsched-last-insn-heuristic
1934 Common Report Var(flag_sched_last_insn_heuristic) Init(1) Optimization
1935 Enable the last instruction heuristic in the scheduler
1936
1937 fsched-dep-count-heuristic
1938 Common Report Var(flag_sched_dep_count_heuristic) Init(1) Optimization
1939 Enable the dependent count heuristic in the scheduler
1940
1941 fsection-anchors
1942 Common Report Var(flag_section_anchors) Optimization
1943 Access data in the same section from shared anchor points
1944
1945 fsee
1946 Common Ignore
1947 Does nothing.  Preserved for backward compatibility.
1948
1949 fzee
1950 Common Ignore
1951 Does nothing.  Preserved for backward compatibility.
1952
1953 free
1954 Common Report Var(flag_ree) Init(0)
1955 Turn on Redundant Extensions Elimination pass.
1956
1957 fshow-column
1958 Common Report Var(flag_show_column) Init(1)
1959 Show column numbers in diagnostics, when available.  Default on
1960
1961 fshrink-wrap
1962 Common Report Var(flag_shrink_wrap) Optimization
1963 Emit function prologues only before parts of the function that need it,
1964 rather than at the top of the function.
1965
1966 fsignaling-nans
1967 Common Report Var(flag_signaling_nans) Optimization SetByCombined
1968 Disable optimizations observable by IEEE signaling NaNs
1969
1970 fsigned-zeros
1971 Common Report Var(flag_signed_zeros) Init(1) Optimization SetByCombined
1972 Disable floating point optimizations that ignore the IEEE signedness of zero
1973
1974 fsingle-precision-constant
1975 Common Report Var(flag_single_precision_constant) Optimization
1976 Convert floating point constants to single precision constants
1977
1978 fsplit-ivs-in-unroller
1979 Common Report Var(flag_split_ivs_in_unroller) Init(1) Optimization
1980 Split lifetimes of induction variables when loops are unrolled
1981
1982 fsplit-stack
1983 Common Report Var(flag_split_stack) Init(-1)
1984 Generate discontiguous stack frames
1985
1986 fsplit-wide-types
1987 Common Report Var(flag_split_wide_types) Optimization
1988 Split wide types into independent registers
1989
1990 fssa-phiopt
1991 Common Report Var(flag_ssa_phiopt) Optimization
1992 Optimize conditional patterns using SSA PHI nodes
1993
1994 fvariable-expansion-in-unroller
1995 Common Report Var(flag_variable_expansion_in_unroller) Optimization
1996 Apply variable expansion when loops are unrolled
1997
1998 fstack-check=
1999 Common Report RejectNegative Joined
2000 -fstack-check=[no|generic|specific]     Insert stack checking code into the program
2001
2002 fstack-check
2003 Common Alias(fstack-check=, specific, no)
2004 Insert stack checking code into the program.  Same as -fstack-check=specific
2005
2006 fstack-limit
2007 Common Var(common_deferred_options) Defer
2008
2009 fstack-limit-register=
2010 Common RejectNegative Joined Var(common_deferred_options) Defer
2011 -fstack-limit-register=<register>       Trap if the stack goes past <register>
2012
2013 fstack-limit-symbol=
2014 Common RejectNegative Joined Var(common_deferred_options) Defer
2015 -fstack-limit-symbol=<name>     Trap if the stack goes past symbol <name>
2016
2017 fstack-protector
2018 Common Report Var(flag_stack_protect, 1)
2019 Use propolice as a stack protection method
2020
2021 fstack-protector-all
2022 Common Report RejectNegative Var(flag_stack_protect, 2)
2023 Use a stack protection method for every function
2024
2025 fstack-protector-strong
2026 Common Report RejectNegative Var(flag_stack_protect, 3)
2027 Use a smart stack protection method for certain functions
2028
2029 fstack-usage
2030 Common RejectNegative Var(flag_stack_usage)
2031 Output stack usage information on a per-function basis
2032
2033 fstrength-reduce
2034 Common Ignore
2035 Does nothing.  Preserved for backward compatibility.
2036
2037 ; Nonzero if we should do (language-dependent) alias analysis.
2038 ; Typically, this analysis will assume that expressions of certain
2039 ; types do not alias expressions of certain other types.  Only used
2040 ; if alias analysis (in general) is enabled.
2041 fstrict-aliasing
2042 Common Report Var(flag_strict_aliasing) Optimization
2043 Assume strict aliasing rules apply
2044
2045 fstrict-overflow
2046 Common Report Var(flag_strict_overflow)
2047 Treat signed overflow as undefined
2048
2049 fsync-libcalls
2050 Common Report Var(flag_sync_libcalls) Init(1)
2051 Implement __atomic operations via libcalls to legacy __sync functions
2052
2053 fsyntax-only
2054 Common Report Var(flag_syntax_only)
2055 Check for syntax errors, then stop
2056
2057 ftest-coverage
2058 Common Report Var(flag_test_coverage)
2059 Create data files needed by \"gcov\"
2060
2061 fthread-jumps
2062 Common Report Var(flag_thread_jumps) Optimization
2063 Perform jump threading optimizations
2064
2065 ftime-report
2066 Common Report Var(time_report)
2067 Report the time taken by each compiler pass
2068
2069 ftls-model=
2070 Common Joined RejectNegative Enum(tls_model) Var(flag_tls_default) Init(TLS_MODEL_GLOBAL_DYNAMIC)
2071 -ftls-model=[global-dynamic|local-dynamic|initial-exec|local-exec]      Set the default thread-local storage code generation model
2072
2073 Enum
2074 Name(tls_model) Type(enum tls_model) UnknownError(unknown TLS model %qs)
2075
2076 EnumValue
2077 Enum(tls_model) String(global-dynamic) Value(TLS_MODEL_GLOBAL_DYNAMIC)
2078
2079 EnumValue
2080 Enum(tls_model) String(local-dynamic) Value(TLS_MODEL_LOCAL_DYNAMIC)
2081
2082 EnumValue
2083 Enum(tls_model) String(initial-exec) Value(TLS_MODEL_INITIAL_EXEC)
2084
2085 EnumValue
2086 Enum(tls_model) String(local-exec) Value(TLS_MODEL_LOCAL_EXEC)
2087
2088 ftoplevel-reorder
2089 Common Report Var(flag_toplevel_reorder) Init(2) Optimization
2090 Reorder top level functions, variables, and asms
2091
2092 ftracer
2093 Common Report Var(flag_tracer)
2094 Perform superblock formation via tail duplication
2095
2096 ; Zero means that floating-point math operations cannot generate a
2097 ; (user-visible) trap.  This is the case, for example, in nonstop
2098 ; IEEE 754 arithmetic.
2099 ftrapping-math
2100 Common Report Var(flag_trapping_math) Init(1) Optimization SetByCombined
2101 Assume floating-point operations can trap
2102
2103 ftrapv
2104 Common Report Var(flag_trapv) Optimization
2105 Trap for signed overflow in addition, subtraction and multiplication
2106
2107 ftree-ccp
2108 Common Report Var(flag_tree_ccp) Optimization
2109 Enable SSA-CCP optimization on trees
2110
2111 ftree-bit-ccp
2112 Common Report Var(flag_tree_bit_ccp) Optimization
2113 Enable SSA-BIT-CCP optimization on trees
2114
2115 ftree-store-ccp
2116 Common Ignore
2117 Does nothing.  Preserved for backward compatibility.
2118
2119 ftree-ch
2120 Common Report Var(flag_tree_ch) Optimization
2121 Enable loop header copying on trees
2122
2123 ftree-coalesce-inlined-vars
2124 Common Report Var(flag_ssa_coalesce_vars,1) Init(2) RejectNegative Optimization
2125 Enable coalescing of copy-related user variables that are inlined
2126
2127 ftree-coalesce-vars
2128 Common Report Var(flag_ssa_coalesce_vars,2) Optimization
2129 Enable coalescing of all copy-related user variables
2130
2131 ftree-copyrename
2132 Common Report Var(flag_tree_copyrename) Optimization
2133 Replace SSA temporaries with better names in copies
2134
2135 ftree-copy-prop
2136 Common Report Var(flag_tree_copy_prop) Optimization
2137 Enable copy propagation on trees
2138
2139 ftree-store-copy-prop
2140 Common Ignore
2141 Does nothing.  Preserved for backward compatibility.
2142
2143 ftree-cselim
2144 Common Report Var(flag_tree_cselim) Init(2) Optimization
2145 Transform condition stores into unconditional ones
2146
2147 ftree-switch-conversion
2148 Common Report Var(flag_tree_switch_conversion) Optimization
2149 Perform conversions of switch initializations.
2150
2151 ftree-dce
2152 Common Report Var(flag_tree_dce) Optimization
2153 Enable SSA dead code elimination optimization on trees
2154
2155 ftree-dominator-opts
2156 Common Report Var(flag_tree_dom) Optimization
2157 Enable dominator optimizations
2158
2159 ftree-tail-merge
2160 Common Report Var(flag_tree_tail_merge) Optimization
2161 Enable tail merging on trees
2162
2163 ftree-dse
2164 Common Report Var(flag_tree_dse) Optimization
2165 Enable dead store elimination
2166
2167 ftree-forwprop
2168 Common Report Var(flag_tree_forwprop) Init(1) Optimization
2169 Enable forward propagation on trees
2170
2171 ftree-fre
2172 Common Report Var(flag_tree_fre) Optimization
2173 Enable Full Redundancy Elimination (FRE) on trees
2174
2175 foptimize-strlen
2176 Common Report Var(flag_optimize_strlen) Optimization
2177 Enable string length optimizations on trees
2178
2179 fisolate-erroneous-paths-dereference
2180 Common Report Var(flag_isolate_erroneous_paths_dereference) Optimization
2181 Detect paths which trigger erroneous or undefined behaviour due to
2182 dereferencing a NULL pointer.  Isolate those paths from the main control
2183 flow and turn the statement with erroneous or undefined behaviour into a trap.
2184
2185 fisolate-erroneous-paths-attribute
2186 Common Report Var(flag_isolate_erroneous_paths_attribute) Optimization
2187 Detect paths which trigger erroneous or undefined behaviour due a NULL value
2188 being used in a way which is forbidden by a returns_nonnull or nonnull
2189 attribute.  Isolate those paths from the main control flow and turn the
2190 statement with erroneous or undefined behaviour into a trap.
2191
2192 ftree-loop-distribution
2193 Common Report Var(flag_tree_loop_distribution) Optimization
2194 Enable loop distribution on trees
2195
2196 ftree-loop-distribute-patterns
2197 Common Report Var(flag_tree_loop_distribute_patterns) Optimization
2198 Enable loop distribution for patterns transformed into a library call
2199
2200 ftree-loop-im
2201 Common Report Var(flag_tree_loop_im) Init(1) Optimization
2202 Enable loop invariant motion on trees
2203
2204 ftree-loop-linear
2205 Common Alias(floop-interchange)
2206 Enable loop interchange transforms.  Same as -floop-interchange
2207
2208 ftree-loop-ivcanon
2209 Common Report Var(flag_tree_loop_ivcanon) Init(1) Optimization
2210 Create canonical induction variables in loops
2211
2212 ftree-loop-optimize
2213 Common Report Var(flag_tree_loop_optimize) Init(1) Optimization
2214 Enable loop optimizations on tree level
2215
2216 ftree-parallelize-loops=
2217 Common Report Joined RejectNegative UInteger Var(flag_tree_parallelize_loops) Init(1)
2218 Enable automatic parallelization of loops
2219
2220 ftree-phiprop
2221 Common Report Var(flag_tree_phiprop) Init(1) Optimization
2222 Enable hoisting loads from conditional pointers.
2223
2224 ftree-pre
2225 Common Report Var(flag_tree_pre) Optimization
2226 Enable SSA-PRE optimization on trees
2227
2228 ftree-partial-pre
2229 Common Report Var(flag_tree_partial_pre) Optimization
2230 In SSA-PRE optimization on trees, enable partial-partial redundancy elimination
2231
2232 ftree-pta
2233 Common Report Var(flag_tree_pta) Optimization
2234 Perform function-local points-to analysis on trees.
2235
2236 ftree-reassoc
2237 Common Report Var(flag_tree_reassoc) Init(1) Optimization
2238 Enable reassociation on tree level
2239
2240 ftree-salias
2241 Common Ignore
2242 Does nothing.  Preserved for backward compatibility.
2243
2244 ftree-sink
2245 Common Report Var(flag_tree_sink) Optimization
2246 Enable SSA code sinking on trees
2247
2248 ftree-slsr
2249 Common Report Var(flag_tree_slsr) Optimization
2250 Perform straight-line strength reduction
2251
2252 ftree-sra
2253 Common Report Var(flag_tree_sra) Optimization
2254 Perform scalar replacement of aggregates
2255
2256 ftree-ter
2257 Common Report Var(flag_tree_ter) Optimization
2258 Replace temporary expressions in the SSA->normal pass
2259
2260 ftree-lrs
2261 Common Report Var(flag_tree_live_range_split) Optimization
2262 Perform live range splitting during the SSA->normal pass
2263
2264 ftree-vrp
2265 Common Report Var(flag_tree_vrp) Init(0) Optimization
2266 Perform Value Range Propagation on trees
2267
2268 funit-at-a-time
2269 Common Report Var(flag_unit_at_a_time) Init(1) Optimization
2270 Compile whole compilation unit at a time
2271
2272 funroll-loops
2273 Common Report Var(flag_unroll_loops) Optimization
2274 Perform loop unrolling when iteration count is known
2275
2276 funroll-all-loops
2277 Common Report Var(flag_unroll_all_loops) Optimization
2278 Perform loop unrolling for all loops
2279
2280 ; Nonzero means that loop optimizer may assume that the induction variables
2281 ; that control loops do not overflow and that the loops with nontrivial
2282 ; exit condition are not infinite
2283 funsafe-loop-optimizations
2284 Common Report Var(flag_unsafe_loop_optimizations) Optimization
2285 Allow loop optimizations to assume that the loops behave in normal way
2286
2287 fassociative-math
2288 Common Report Var(flag_associative_math) SetByCombined
2289 Allow optimization for floating-point arithmetic which may change the
2290 result of the operation due to rounding.
2291
2292 freciprocal-math
2293 Common Report Var(flag_reciprocal_math) SetByCombined
2294 Same as -fassociative-math for expressions which include division.
2295
2296 ; Nonzero means that unsafe floating-point math optimizations are allowed
2297 ; for the sake of speed.  IEEE compliance is not guaranteed, and operations
2298 ; are allowed to assume that their arguments and results are "normal"
2299 ; (e.g., nonnegative for SQRT).
2300 funsafe-math-optimizations
2301 Common Report Var(flag_unsafe_math_optimizations) Optimization SetByCombined
2302 Allow math optimizations that may violate IEEE or ISO standards
2303
2304 funswitch-loops
2305 Common Report Var(flag_unswitch_loops) Optimization
2306 Perform loop unswitching
2307
2308 funwind-tables
2309 Common Report Var(flag_unwind_tables) Optimization
2310 Just generate unwind tables for exception handling
2311
2312 fuse-ld=bfd
2313 Common Driver Negative(fuse-ld=gold)
2314 Use the bfd linker instead of the default linker
2315
2316 fuse-ld=gold
2317 Common Driver Negative(fuse-ld=bfd)
2318 Use the gold linker instead of the default linker
2319
2320 fuse-linker-plugin
2321 Common Undocumented Var(flag_use_linker_plugin)
2322
2323 ; Positive if we should track variables, negative if we should run
2324 ; the var-tracking pass only to discard debug annotations, zero if
2325 ; we're not to run it.  When flag_var_tracking == 2 (AUTODETECT_VALUE) it
2326 ; will be set according to optimize, debug_info_level and debug_hooks
2327 ; in process_options ().
2328 fvar-tracking
2329 Common Report Var(flag_var_tracking) Init(2) Optimization
2330 Perform variable tracking
2331
2332 ; Positive if we should track variables at assignments, negative if
2333 ; we should run the var-tracking pass only to discard debug
2334 ; annotations.  When flag_var_tracking_assignments ==
2335 ; AUTODETECT_VALUE it will be set according to flag_var_tracking.
2336 fvar-tracking-assignments
2337 Common Report Var(flag_var_tracking_assignments) Init(2) Optimization
2338 Perform variable tracking by annotating assignments
2339
2340 ; Nonzero if we should toggle flag_var_tracking_assignments after
2341 ; processing options and computing its default.  */
2342 fvar-tracking-assignments-toggle
2343 Common Report Var(flag_var_tracking_assignments_toggle) Optimization
2344 Toggle -fvar-tracking-assignments
2345
2346 ; Positive if we should track uninitialized variables, negative if
2347 ; we should run the var-tracking pass only to discard debug
2348 ; annotations.  When flag_var_tracking_uninit == AUTODETECT_VALUE it
2349 ; will be set according to flag_var_tracking.
2350 fvar-tracking-uninit
2351 Common Report Var(flag_var_tracking_uninit) Optimization
2352 Perform variable tracking and also tag variables that are uninitialized
2353
2354 ftree-vectorize
2355 Common Report Var(flag_tree_vectorize) Optimization
2356 Enable vectorization on trees
2357
2358 ftree-vectorizer-verbose=
2359 Common Joined RejectNegative Ignore
2360 Does nothing.  Preserved for backward compatibility.
2361
2362 ftree-loop-vectorize
2363 Common Report Var(flag_tree_loop_vectorize) Optimization
2364 Enable loop vectorization on trees
2365
2366 ftree-slp-vectorize
2367 Common Report Var(flag_tree_slp_vectorize) Optimization
2368 Enable basic block vectorization (SLP) on trees
2369
2370 fvect-cost-model=
2371 Common Joined RejectNegative Enum(vect_cost_model) Var(flag_vect_cost_model) Init(VECT_COST_MODEL_DEFAULT)
2372 Specifies the cost model for vectorization
2373
2374 fsimd-cost-model=
2375 Common Joined RejectNegative Enum(vect_cost_model) Var(flag_simd_cost_model) Init(VECT_COST_MODEL_UNLIMITED)
2376 Specifies the vectorization cost model for code marked with a simd directive
2377
2378 Enum
2379 Name(vect_cost_model) Type(enum vect_cost_model) UnknownError(unknown vectorizer cost model %qs)
2380
2381 EnumValue
2382 Enum(vect_cost_model) String(unlimited) Value(VECT_COST_MODEL_UNLIMITED)
2383
2384 EnumValue
2385 Enum(vect_cost_model) String(dynamic) Value(VECT_COST_MODEL_DYNAMIC)
2386
2387 EnumValue
2388 Enum(vect_cost_model) String(cheap) Value(VECT_COST_MODEL_CHEAP)
2389
2390 fvect-cost-model
2391 Common RejectNegative Alias(fvect-cost-model=,dynamic)
2392 Enables the dynamic vectorizer cost model.  Preserved for backward compatibility.
2393
2394 fno-vect-cost-model
2395 Common RejectNegative Alias(fvect-cost-model=,unlimited)
2396 Enables the unlimited vectorizer cost model.  Preserved for backward compatibility.
2397
2398 ftree-vect-loop-version
2399 Common Ignore
2400 Does nothing. Preserved for backward compatibility.
2401
2402 ftree-scev-cprop
2403 Common Report Var(flag_tree_scev_cprop) Init(1) Optimization
2404 Enable copy propagation of scalar-evolution information.
2405
2406 ; -fverbose-asm causes extra commentary information to be produced in
2407 ; the generated assembly code (to make it more readable).  This option
2408 ; is generally only of use to those who actually need to read the
2409 ; generated assembly code (perhaps while debugging the compiler itself).
2410 ; -fno-verbose-asm, the default, causes the extra information
2411 ; to not be added and is useful when comparing two assembler files.
2412 fverbose-asm
2413 Common Report Var(flag_verbose_asm)
2414 Add extra commentary to assembler output
2415
2416 fvisibility=
2417 Common Joined RejectNegative Enum(symbol_visibility) Var(default_visibility) Init(VISIBILITY_DEFAULT)
2418 -fvisibility=[default|internal|hidden|protected]        Set the default symbol visibility
2419
2420 Enum
2421 Name(symbol_visibility) Type(enum symbol_visibility) UnknownError(unrecognized visibility value %qs)
2422
2423 EnumValue
2424 Enum(symbol_visibility) String(default) Value(VISIBILITY_DEFAULT)
2425
2426 EnumValue
2427 Enum(symbol_visibility) String(internal) Value(VISIBILITY_INTERNAL)
2428
2429 EnumValue
2430 Enum(symbol_visibility) String(hidden) Value(VISIBILITY_HIDDEN)
2431
2432 EnumValue
2433 Enum(symbol_visibility) String(protected) Value(VISIBILITY_PROTECTED)
2434
2435 fvtable-verify=
2436 Common Joined RejectNegative Enum(vtv_priority) Var(flag_vtable_verify) Init(VTV_NO_PRIORITY)
2437 Validate vtable pointers before using them.
2438
2439 Enum
2440 Name(vtv_priority) Type(enum vtv_priority) UnknownError(unknown vtable verify initialization priority %qs)
2441
2442 EnumValue
2443 Enum(vtv_priority) String(none) Value(VTV_NO_PRIORITY)
2444
2445 EnumValue
2446 Enum(vtv_priority) String(std) Value(VTV_STANDARD_PRIORITY)
2447
2448 EnumValue
2449 Enum(vtv_priority) String(preinit) Value(VTV_PREINIT_PRIORITY)
2450
2451 fvtv-counts
2452 Common Var(flag_vtv_counts)
2453 Output vtable verification counters.
2454
2455 fvtv-debug
2456 Common Var(flag_vtv_debug)
2457 Output vtable verification pointer sets information.
2458
2459 fvpt
2460 Common Report Var(flag_value_profile_transformations) Optimization
2461 Use expression value profiles in optimizations
2462
2463 fweb
2464 Common Report Var(flag_web) Init(2) Optimization
2465 Construct webs and split unrelated uses of single variable
2466
2467 ftree-builtin-call-dce
2468 Common Report Var(flag_tree_builtin_call_dce) Init(0) Optimization
2469 Enable conditional dead code elimination for builtin calls
2470
2471 fwhole-program
2472 Common Report Var(flag_whole_program) Init(0) Optimization
2473 Perform whole program optimizations
2474
2475 fwrapv
2476 Common Report Var(flag_wrapv) Optimization
2477 Assume signed arithmetic overflow wraps around
2478
2479 fzero-initialized-in-bss
2480 Common Report Var(flag_zero_initialized_in_bss) Init(1)
2481 Put zero initialized data in the bss section
2482
2483 g
2484 Common JoinedOrMissing
2485 Generate debug information in default format
2486
2487 gcoff
2488 Common JoinedOrMissing Negative(gdwarf)
2489 Generate debug information in COFF format
2490
2491 gdwarf
2492 Common JoinedOrMissing Negative(gdwarf-)
2493 Generate debug information in default version of DWARF format
2494
2495 gdwarf-
2496 Common Joined UInteger Var(dwarf_version) Init(4) Negative(gstabs)
2497 Generate debug information in DWARF v2 (or later) format
2498
2499 ggdb
2500 Common JoinedOrMissing
2501 Generate debug information in default extended format
2502
2503 gno-pubnames
2504 Common Negative(gpubnames) Var(debug_generate_pub_sections, 0) Init(-1)
2505 Don't generate DWARF pubnames and pubtypes sections.
2506
2507 gpubnames
2508 Common Negative(ggnu-pubnames) Var(debug_generate_pub_sections, 1)
2509 Generate DWARF pubnames and pubtypes sections.
2510
2511 ggnu-pubnames
2512 Common Negative(gno-pubnames) Var(debug_generate_pub_sections, 2)
2513 Generate DWARF pubnames and pubtypes sections with GNU extensions.
2514
2515 gno-record-gcc-switches
2516 Common RejectNegative Var(dwarf_record_gcc_switches,0) Init(1)
2517 Don't record gcc command line switches in DWARF DW_AT_producer.
2518
2519 grecord-gcc-switches
2520 Common RejectNegative Var(dwarf_record_gcc_switches,1)
2521 Record gcc command line switches in DWARF DW_AT_producer.
2522
2523 gno-split-dwarf
2524 Common Driver RejectNegative Var(dwarf_split_debug_info,0) Init(0)
2525 Don't generate debug information in separate .dwo files
2526
2527 gsplit-dwarf
2528 Common Driver RejectNegative Var(dwarf_split_debug_info,1)
2529 Generate debug information in separate .dwo files
2530
2531 gstabs
2532 Common JoinedOrMissing Negative(gstabs+)
2533 Generate debug information in STABS format
2534
2535 gstabs+
2536 Common JoinedOrMissing Negative(gvms)
2537 Generate debug information in extended STABS format
2538
2539 gno-strict-dwarf
2540 Common RejectNegative Var(dwarf_strict,0) Init(0)
2541 Emit DWARF additions beyond selected version
2542
2543 gstrict-dwarf
2544 Common Report RejectNegative Var(dwarf_strict,1)
2545 Don't emit DWARF additions beyond selected version
2546
2547 gtoggle
2548 Common Report Var(flag_gtoggle)
2549 Toggle debug information generation
2550
2551 gvms
2552 Common JoinedOrMissing Negative(gxcoff)
2553 Generate debug information in VMS format
2554
2555 gxcoff
2556 Common JoinedOrMissing Negative(gxcoff+)
2557 Generate debug information in XCOFF format
2558
2559 gxcoff+
2560 Common JoinedOrMissing Negative(gcoff)
2561 Generate debug information in extended XCOFF format
2562
2563 Enum
2564 Name(compressed_debug_sections) Type(int)
2565
2566 ; Since -gz= is completely handled in specs, the values aren't used and we
2567 ; assign arbitrary constants.
2568 EnumValue
2569 Enum(compressed_debug_sections) String(none) Value(0)
2570
2571 EnumValue
2572 Enum(compressed_debug_sections) String(zlib) Value(1)
2573
2574 EnumValue
2575 Enum(compressed_debug_sections) String(zlib-gnu) Value(2)
2576
2577 gz
2578 Common Driver
2579 Generate compressed debug sections
2580
2581 gz=
2582 Common Driver Joined Enum(compressed_debug_sections)
2583 -gz=<format>    Generate compressed debug sections in format <format>
2584
2585 h
2586 Driver Joined Separate
2587
2588 iplugindir=
2589 Common Joined Var(plugindir_string) Init(0)
2590 -iplugindir=<dir>       Set <dir> to be the default plugin directory
2591
2592 imultiarch
2593 Common Joined Separate RejectDriver Var(imultiarch) Init(0)
2594 -imultiarch <dir>       Set <dir> to be the multiarch include subdirectory
2595
2596 l
2597 Driver Joined Separate
2598
2599 n
2600 Driver
2601
2602 no-canonical-prefixes
2603 Driver
2604
2605 nodefaultlibs
2606 Driver
2607
2608 nostartfiles
2609 Driver
2610
2611 nostdlib
2612 Driver
2613
2614 o
2615 Common Driver Joined Separate Var(asm_file_name) MissingArgError(missing filename after %qs)
2616 -o <file>       Place output into <file>
2617
2618 p
2619 Common Var(profile_flag)
2620 Enable function profiling
2621
2622 pass-exit-codes
2623 Driver Var(pass_exit_codes)
2624
2625 pedantic
2626 Common Alias(Wpedantic)
2627
2628 pedantic-errors
2629 Common Var(flag_pedantic_errors)
2630 Like -pedantic but issue them as errors
2631
2632 pg
2633 Driver
2634
2635 pipe
2636 Driver Var(use_pipes)
2637
2638 print-file-name=
2639 Driver JoinedOrMissing Var(print_file_name)
2640
2641 print-libgcc-file-name
2642 Driver
2643
2644 print-multi-directory
2645 Driver Var(print_multi_directory)
2646
2647 print-multi-lib
2648 Driver Var(print_multi_lib)
2649
2650 print-multi-os-directory
2651 Driver Var(print_multi_os_directory)
2652
2653 print-multiarch
2654 Driver Var(print_multiarch)
2655
2656 print-prog-name=
2657 Driver JoinedOrMissing Var(print_prog_name)
2658
2659 print-search-dirs
2660 Driver Var(print_search_dirs)
2661
2662 print-sysroot
2663 Driver Var(print_sysroot)
2664
2665 print-sysroot-headers-suffix
2666 Driver Var(print_sysroot_headers_suffix)
2667
2668 quiet
2669 Common Var(quiet_flag) RejectDriver
2670 Do not display functions compiled or elapsed time
2671
2672 r
2673 Driver
2674
2675 s
2676 Driver
2677
2678 save-temps
2679 Driver
2680
2681 save-temps=
2682 Driver Joined
2683
2684 t
2685 Driver
2686
2687 time
2688 Driver Var(report_times)
2689
2690 time=
2691 Driver JoinedOrMissing
2692
2693 u
2694 Driver Joined Separate
2695
2696 undef
2697 Driver
2698 ; C option, but driver must not handle as "-u ndef".
2699
2700 v
2701 Common Driver Var(verbose_flag)
2702 Enable verbose output
2703
2704 version
2705 Common Var(version_flag) RejectDriver
2706 Display the compiler's version
2707
2708 w
2709 Common Var(inhibit_warnings)
2710 Suppress warnings
2711
2712 wrapper
2713 Driver Separate Var(wrapper_string)
2714
2715 x
2716 Driver Joined Separate
2717
2718 shared
2719 Driver RejectNegative Negative(pie)
2720 Create a shared library
2721
2722 shared-libgcc
2723 Driver
2724
2725 specs
2726 Driver Separate Alias(specs=)
2727
2728 specs=
2729 Driver Joined
2730
2731 static
2732 Driver
2733
2734 static-libgcc
2735 Driver
2736
2737 static-libgfortran
2738 Driver
2739 ; Documented for Fortran, but always accepted by driver.
2740
2741 static-libstdc++
2742 Driver
2743
2744 static-libgo
2745 Driver
2746 ; Documented for Go, but always accepted by driver.
2747
2748 static-libasan
2749 Driver
2750
2751 static-libtsan
2752 Driver
2753
2754 static-liblsan
2755 Driver
2756
2757 static-libubsan
2758 Driver
2759
2760 symbolic
2761 Driver
2762
2763 pie
2764 Driver RejectNegative Negative(shared)
2765 Create a position independent executable
2766
2767 z
2768 Driver Joined Separate
2769
2770 fuse-caller-save
2771 Common Report Var(flag_use_caller_save) Optimization
2772 Use caller save register across calls if possible
2773
2774 ; This comment is to ensure we retain the blank line above.