gcc/common.opt

   1 ; Options for the language- and target-independent parts of the compiler.
   2
   3 ; Copyright (C) 2003-2014 Free Software Foundation, Inc.
   4 ;
   5 ; This file is part of GCC.
   6 ;
   7 ; GCC is free software; you can redistribute it and/or modify it under
   8 ; the terms of the GNU General Public License as published by the Free
   9 ; Software Foundation; either version 3, or (at your option) any later
  10 ; version.
  11 ;
  12 ; GCC is distributed in the hope that it will be useful, but WITHOUT ANY
  13 ; WARRANTY; without even the implied warranty of MERCHANTABILITY or
  14 ; FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  15 ; for more details.
  16 ;
  17 ; You should have received a copy of the GNU General Public License
  18 ; along with GCC; see the file COPYING3.  If not see
  19 ; <http://www.gnu.org/licenses/>.
  20
  21 ; See the GCC internals manual (options.texi) for a description of this file's format.
  22
  23 ; Please try to keep this file in ASCII collating order.
  24
  25 Variable
  26 int target_flags
  27
  28 Variable
  29 int optimize
  30
  31 Variable
  32 int optimize_size
  33
  34 Variable
  35 int optimize_debug
  36
  37 ; Not used directly to control optimizations, only to save -Ofast
  38 ; setting for "optimize" attributes.
  39 Variable
  40 int optimize_fast
  41
  42 ; True if this is the lto front end.  This is used to disable gimple
  43 ; generation and lowering passes that are normally run on the output
  44 ; of a front end.  These passes must be bypassed for lto since they
  45 ; have already been done before the gimple was written.
  46 Variable
  47 bool in_lto_p = false
  48
  49 ; 0 means straightforward implementation of complex divide acceptable.
  50 ; 1 means wide ranges of inputs must work for complex divide.
  51 ; 2 means C99-like requirements for complex multiply and divide.
  52 Variable
  53 int flag_complex_method = 1
  54
  55 ; Nonzero if subexpressions must be evaluated from left-to-right.
  56 Variable
  57 int flag_evaluation_order = 0
  58
  59 ; Language specific warning pass for unused results.
  60 Variable
  61 bool flag_warn_unused_result = false
  62
  63 Variable
  64 int *param_values
  65
  66 ; Nonzero if we should write GIMPLE bytecode for link-time optimization.
  67 Variable
  68 int flag_generate_lto
  69
  70 ; True to warn about any objects definitions whose size is larger
  71 ; than N bytes.  Also want about function definitions whose returned
  72 ; values are larger than N bytes, where N is 'larger_than_size'.
  73 Variable
  74 bool warn_larger_than
  75
  76 Variable
  77 HOST_WIDE_INT larger_than_size
  78
  79 ; True to warn about any function whose frame size is larger
  80 ; than N bytes.
  81 Variable
  82 bool warn_frame_larger_than
  83
  84 Variable
  85 HOST_WIDE_INT frame_larger_than_size
  86
  87 ; Nonzero means we should be saving declaration info into a .X file.
  88 Variable
  89 int flag_gen_aux_info = 0
  90
  91 ; Nonzero if we are compiling code for a shared library, zero for
  92 ; executable.
  93 Variable
  94 int flag_shlib
  95
  96 ; These two are really VEC(char_p,heap) *.
  97
  98 Variable
  99 void *flag_instrument_functions_exclude_functions
 100
 101 Variable
 102 void *flag_instrument_functions_exclude_files
 103
 104 ; Generic structs (e.g. templates not explicitly specialized)
 105 ; may not have a compilation unit associated with them, and so
 106 ; may need to be treated differently from ordinary structs.
 107 ;
 108 ; Structs only handled by reference (indirectly), will also usually
 109 ; not need as much debugging information.
 110
 111 Variable
 112 enum debug_struct_file debug_struct_ordinary[DINFO_USAGE_NUM_ENUMS] = { DINFO_STRUCT_FILE_ANY, DINFO_STRUCT_FILE_ANY, DINFO_STRUCT_FILE_ANY }
 113
 114 Variable
 115 enum debug_struct_file debug_struct_generic[DINFO_USAGE_NUM_ENUMS] = { DINFO_STRUCT_FILE_ANY, DINFO_STRUCT_FILE_ANY, DINFO_STRUCT_FILE_ANY }
 116
 117 ; True if we should exit after parsing options.
 118 Variable
 119 bool exit_after_options
 120
 121 ; Type(s) of debugging information we are producing (if any).  See
 122 ; flag-types.h for the definitions of the different possible types of
 123 ; debugging information.
 124 Variable
 125 enum debug_info_type write_symbols = NO_DEBUG
 126
 127 ; Level of debugging information we are producing.  See flag-types.h
 128 ; for the definitions of the different possible levels.
 129 Variable
 130 enum debug_info_levels debug_info_level = DINFO_LEVEL_NONE
 131
 132 ; Nonzero means use GNU-only extensions in the generated symbolic
 133 ; debugging information.  Currently, this only has an effect when
 134 ; write_symbols is set to DBX_DEBUG, XCOFF_DEBUG, or DWARF_DEBUG.
 135 Variable
 136 bool use_gnu_debug_info_extensions
 137
 138 ; Original value of maximum field alignment in bytes, specified via
 139 ; -fpack-struct=<value>.
 140 Variable
 141 unsigned int initial_max_fld_align = TARGET_DEFAULT_PACK_STRUCT
 142
 143 ; Type of stack check.
 144 Variable
 145 enum stack_check_type flag_stack_check = NO_STACK_CHECK
 146
 147 ; True if stack usage information needs to be computed.
 148 Variable
 149 bool flag_stack_usage_info = false
 150
 151 ; -dA causes debug commentary information to be produced in
 152 ; the generated assembly code (to make it more readable).  This option
 153 ; is generally only of use to those who actually need to read the
 154 ; generated assembly code (perhaps while debugging the compiler itself).
 155 ; Currently, this switch is only used by dwarf2out.c; however, it is intended
 156 ; to be a catchall for printing debug information in the assembler file.
 157 Variable
 158 int flag_debug_asm
 159
 160 ; -dP causes the rtl to be emitted as a comment in assembly.
 161 Variable
 162 int flag_dump_rtl_in_asm
 163
 164 ; Whether -da was passed (used only in handle_common_deferred_options).
 165 Variable
 166 bool flag_dump_all_passed
 167
 168 ; Other flags saying which kinds of debugging dump have been requested.
 169
 170 Variable
 171 int rtl_dump_and_exit
 172
 173 Variable
 174 int flag_print_asm_name
 175
 176 ; Name of top-level original source file (what was input to cpp).
 177 ; This comes from the #-command at the beginning of the actual input.
 178 ; If there isn't any there, then this is the cc1 input file name.
 179 Variable
 180 const char *main_input_filename
 181
 182 ; Pointer to base name in main_input_filename, with directories and a
 183 ; single final extension removed, and the length of this base
 184 ; name.
 185
 186 Variable
 187 const char *main_input_basename
 188
 189 Variable
 190 int main_input_baselength
 191
 192 ; Which options have been printed by --help.
 193 Variable
 194 char *help_printed
 195
 196 ; Which enums have been printed by --help.  0 = not printed, no
 197 ; relevant options seen, 1 = relevant option seen, not yet printed, 2
 198 ; = printed.
 199 Variable
 200 char *help_enum_printed
 201
 202 ; The number of columns for --help output.
 203 Variable
 204 unsigned int help_columns
 205
 206 ; Whether this options structure has been through finish_options
 207 Variable
 208 bool flag_opts_finished
 209
 210 ; What the sanitizer should instrument
 211 Variable
 212 unsigned int flag_sanitize
 213
 214 ; What sanitizers should recover from errors
 215 Variable
 216 unsigned int flag_sanitize_recover = SANITIZE_UNDEFINED | SANITIZE_NONDEFAULT | SANITIZE_KERNEL_ADDRESS
 217
 218 ; Flag whether a prefix has been added to dump_base_name
 219 Variable
 220 bool dump_base_name_prefixed = false
 221
 222 ###
 223 Driver
 224
 225 -assemble
 226 Driver Alias(S)
 227
 228 -compile
 229 Driver Alias(c)
 230
 231 -coverage
 232 Driver Alias(coverage)
 233
 234 -debug
 235 Common Alias(g)
 236
 237 -dump
 238 Common Separate Alias(d)
 239
 240 -dump=
 241 Common Joined Alias(d)
 242
 243 -dumpbase
 244 Common Separate Alias(dumpbase)
 245
 246 -dumpdir
 247 Common Separate Alias(dumpdir)
 248
 249 -entry
 250 Driver Separate Alias(e)
 251
 252 -entry=
 253 Driver Joined Alias(e)
 254
 255 -extra-warnings
 256 Common Warning Alias(Wextra)
 257
 258 -for-assembler
 259 Driver Separate Alias(Xassembler)
 260
 261 -for-assembler=
 262 Driver JoinedOrMissing Alias(Xassembler)
 263
 264 -for-linker
 265 Driver Separate Alias(Xlinker)
 266
 267 -for-linker=
 268 Driver JoinedOrMissing Alias(Xlinker)
 269
 270 -force-link
 271 Driver Separate Alias(u)
 272
 273 -force-link=
 274 Driver Joined Alias(u)
 275
 276 -help
 277 Common Driver Var(help_flag)
 278 Display this information
 279
 280 -help=
 281 Common Driver Report Joined
 282 --help=<class>  Display descriptions of a specific class of options.  <class> is one or more of optimizers, target, warnings, undocumented, params
 283
 284 -language
 285 Driver Separate Alias(x)
 286
 287 -language=
 288 Driver Joined Alias(x)
 289
 290 -library-directory
 291 Driver Separate Alias(L)
 292
 293 -library-directory=
 294 Driver Joined Alias(L)
 295
 296 -no-canonical-prefixes
 297 Driver Alias(no-canonical-prefixes)
 298
 299 -no-standard-libraries
 300 Driver Alias(nostdlib)
 301
 302 -no-sysroot-suffix
 303 Driver Var(no_sysroot_suffix)
 304
 305 -no-warnings
 306 Common Alias(w)
 307
 308 -optimize
 309 Common Alias(O)
 310
 311 -output
 312 Common Driver Separate Alias(o) MissingArgError(missing filename after %qs)
 313
 314 -output=
 315 Common Driver Joined Alias(o) MissingArgError(missing filename after %qs)
 316
 317 -pass-exit-codes
 318 Driver Alias(pass-exit-codes)
 319
 320 -pedantic
 321 Common Alias(Wpedantic)
 322
 323 -pedantic-errors
 324 Common Alias(pedantic-errors)
 325
 326 -pie
 327 Driver Alias(pie)
 328
 329 -pipe
 330 Driver Alias(pipe)
 331
 332 -prefix
 333 Driver Separate Alias(B)
 334
 335 -prefix=
 336 Driver JoinedOrMissing Alias(B)
 337
 338 -preprocess
 339 Driver Alias(E)
 340
 341 -print-file-name
 342 Driver Separate Alias(print-file-name=)
 343
 344 -print-file-name=
 345 Driver JoinedOrMissing Alias(print-file-name=)
 346
 347 -print-libgcc-file-name
 348 Driver Alias(print-libgcc-file-name)
 349
 350 -print-multi-directory
 351 Driver Alias(print-multi-directory)
 352
 353 -print-multi-lib
 354 Driver Alias(print-multi-lib)
 355
 356 -print-multi-os-directory
 357 Driver Alias(print-multi-os-directory)
 358
 359 -print-multiarch
 360 Driver Alias(print-multiarch)
 361
 362 -print-prog-name
 363 Driver Separate Alias(print-prog-name=)
 364
 365 -print-prog-name=
 366 Driver JoinedOrMissing Alias(print-prog-name=)
 367
 368 -print-search-dirs
 369 Driver Alias(print-search-dirs)
 370
 371 -print-sysroot
 372 Driver Alias(print-sysroot)
 373
 374 -print-sysroot-headers-suffix
 375 Driver Alias(print-sysroot-headers-suffix)
 376
 377 -profile
 378 Common Alias(p)
 379
 380 -save-temps
 381 Driver Alias(save-temps)
 382
 383 -shared
 384 Driver Alias(shared)
 385
 386 -specs
 387 Driver Separate Alias(specs=)
 388
 389 -specs=
 390 Driver Joined Alias(specs=)
 391
 392 -static
 393 Driver Alias(static)
 394
 395 -symbolic
 396 Driver Alias(symbolic)
 397
 398 -target-help
 399 Common Driver
 400 Alias for --help=target
 401
 402 -time
 403 Driver Alias(time)
 404
 405 -verbose
 406 Driver Alias(v)
 407
 408 ;; The driver used to convert options such as --help into forms such
 409 ;; as -fhelp; the following four entries are for compatibility with
 410 ;; any direct uses of those (undocumented) -f forms
 411 fhelp
 412 Common Driver Alias(-help)
 413
 414 fhelp=
 415 Common Driver Joined Alias(-help=)
 416
 417 ftarget-help
 418 Common Driver Alias(-target-help)
 419
 420 fversion
 421 Common Driver Alias(-version)
 422
 423 -param
 424 Common Separate
 425 --param <param>=<value> Set parameter <param> to value.  See below for a complete list of parameters
 426
 427 -param=
 428 Common Joined Alias(-param)
 429
 430 -sysroot
 431 Driver Separate Alias(-sysroot=)
 432
 433 -sysroot=
 434 Driver JoinedOrMissing
 435
 436 -version
 437 Common Driver
 438
 439 B
 440 Driver Joined Separate
 441
 442 E
 443 Driver
 444
 445 L
 446 Driver Joined Separate
 447
 448 N
 449 Driver
 450
 451 O
 452 Common JoinedOrMissing Optimization
 453 -O<number>      Set optimization level to <number>
 454
 455 Os
 456 Common Optimization
 457 Optimize for space rather than speed
 458
 459 Ofast
 460 Common Optimization
 461 Optimize for speed disregarding exact standards compliance
 462
 463 Og
 464 Common Optimization
 465 Optimize for debugging experience rather than speed or size
 466
 467 Q
 468 Driver
 469
 470 Qn
 471 Driver Negative(Qy)
 472
 473 Qy
 474 Driver Negative(Qn)
 475
 476 R
 477 Driver Joined Separate
 478
 479 S
 480 Driver
 481
 482 T
 483 Driver Joined Separate
 484
 485 Tbss
 486 Driver Separate
 487
 488 Tbss=
 489 Driver Joined
 490
 491 Tdata
 492 Driver Separate
 493
 494 Tdata=
 495 Driver Joined
 496
 497 Ttext
 498 Driver Separate
 499
 500 Ttext=
 501 Driver Joined
 502
 503 W
 504 Common RejectNegative Warning Alias(Wextra)
 505 This switch is deprecated; use -Wextra instead
 506
 507 Wa,
 508 Driver JoinedOrMissing
 509
 510 Wl,
 511 Driver JoinedOrMissing
 512
 513 Wp,
 514 Driver JoinedOrMissing
 515
 516 Waggregate-return
 517 Common Var(warn_aggregate_return) Warning
 518 Warn about returning structures, unions or arrays
 519
 520 Waggressive-loop-optimizations
 521 Common Var(warn_aggressive_loop_optimizations) Init(1) Warning
 522 Warn if a loop with constant number of iterations triggers undefined behavior
 523
 524 Warray-bounds
 525 Common Var(warn_array_bounds) Warning
 526 Warn if an array is accessed out of bounds
 527
 528 Wattributes
 529 Common Var(warn_attributes) Init(1) Warning
 530 Warn about inappropriate attribute usage
 531
 532 Wcast-align
 533 Common Var(warn_cast_align) Warning
 534 Warn about pointer casts which increase alignment
 535
 536 Wcpp
 537 Common Var(warn_cpp) Init(1) Warning
 538 Warn when a #warning directive is encountered
 539
 540 Wdeprecated-declarations
 541 Common Var(warn_deprecated_decl) Init(1) Warning
 542 Warn about uses of __attribute__((deprecated)) declarations
 543
 544 Wdisabled-optimization
 545 Common Var(warn_disabled_optimization) Warning
 546 Warn when an optimization pass is disabled
 547
 548 Werror
 549 Common Var(warnings_are_errors)
 550 Treat all warnings as errors
 551
 552 Werror=
 553 Common Joined
 554 Treat specified warning as error
 555
 556 Wextra
 557 Common Var(extra_warnings) Warning
 558 Print extra (possibly unwanted) warnings
 559
 560 Wfatal-errors
 561 Common Var(flag_fatal_errors)
 562 Exit on the first error occurred
 563
 564 Wframe-larger-than=
 565 Common RejectNegative Joined UInteger
 566 -Wframe-larger-than=<number>    Warn if a function's stack frame requires more than <number> bytes
 567
 568 Wfree-nonheap-object
 569 Common Var(warn_free_nonheap_object) Init(1) Warning
 570 Warn when attempting to free a non-heap object
 571
 572 Winline
 573 Common Var(warn_inline) Warning
 574 Warn when an inlined function cannot be inlined
 575
 576 Winvalid-memory-model
 577 Common Var(warn_invalid_memory_model) Init(1) Warning
 578 Warn when an atomic memory model parameter is known to be outside the valid range.
 579
 580 Wlarger-than-
 581 Common RejectNegative Joined Warning Undocumented Alias(Wlarger-than=)
 582
 583 Wlarger-than=
 584 Common RejectNegative Joined UInteger Warning
 585 -Wlarger-than=<number>  Warn if an object is larger than <number> bytes
 586
 587 Wunsafe-loop-optimizations
 588 Common Var(warn_unsafe_loop_optimizations) Warning
 589 Warn if the loop cannot be optimized due to nontrivial assumptions.
 590
 591 Wmissing-noreturn
 592 Common Alias(Wsuggest-attribute=noreturn)
 593
 594 Wodr
 595 Common Var(warn_odr_violations) Init(1) Warning
 596 Warn about some C++ One Definition Rule violations during link time optimization
 597
 598 Woverflow
 599 Common Var(warn_overflow) Init(1) Warning
 600 Warn about overflow in arithmetic expressions
 601
 602 Wpacked
 603 Common Var(warn_packed) Warning
 604 Warn when the packed attribute has no effect on struct layout
 605
 606 Wpadded
 607 Common Var(warn_padded) Warning
 608 Warn when padding is required to align structure members
 609
 610 Wpedantic
 611 Common Var(pedantic) Init(0) Warning
 612 Issue warnings needed for strict compliance to the standard
 613
 614 Wreturn-local-addr
 615 Common Var(warn_return_local_addr) Init(1) Warning
 616 Warn about returning a pointer/reference to a local or temporary variable.
 617
 618 Wshadow
 619 Common Var(warn_shadow) Warning
 620 Warn when one local variable shadows another
 621
 622 Wstack-protector
 623 Common Var(warn_stack_protect) Warning
 624 Warn when not issuing stack smashing protection for some reason
 625
 626 Wstack-usage=
 627 Common Joined RejectNegative UInteger Var(warn_stack_usage) Init(-1) Warning
 628 Warn if stack usage might be larger than specified amount
 629
 630 Wstrict-aliasing
 631 Common Warning
 632 Warn about code which might break strict aliasing rules
 633
 634 Wstrict-aliasing=
 635 Common Joined RejectNegative UInteger Var(warn_strict_aliasing) Warning
 636 Warn about code which might break strict aliasing rules
 637
 638 Wstrict-overflow
 639 Common Warning
 640 Warn about optimizations that assume that signed overflow is undefined
 641
 642 Wstrict-overflow=
 643 Common Joined RejectNegative UInteger Var(warn_strict_overflow) Warning
 644 Warn about optimizations that assume that signed overflow is undefined
 645
 646 Wsuggest-attribute=const
 647 Common Var(warn_suggest_attribute_const) Warning
 648 Warn about functions which might be candidates for __attribute__((const))
 649
 650 Wsuggest-attribute=pure
 651 Common Var(warn_suggest_attribute_pure) Warning
 652 Warn about functions which might be candidates for __attribute__((pure))
 653
 654 Wsuggest-attribute=noreturn
 655 Common Var(warn_suggest_attribute_noreturn) Warning
 656 Warn about functions which might be candidates for __attribute__((noreturn))
 657
 658 Wsuggest-final-types
 659 Common Var(warn_suggest_final_types) Warning
 660 Warn about C++ polymorphic types where adding final keyword would improve code quality
 661
 662 Wsuggest-final-methods
 663 Common Var(warn_suggest_final_methods) Warning
 664 Warn about C++ virtual methods where adding final keyword would improve code quality
 665
 666 Wsystem-headers
 667 Common Var(warn_system_headers) Warning
 668 Do not suppress warnings from system headers
 669
 670 Wtrampolines
 671 Common Var(warn_trampolines) Warning
 672 Warn whenever a trampoline is generated
 673
 674 Wtype-limits
 675 Common Var(warn_type_limits) Warning EnabledBy(Wextra)
 676 Warn if a comparison is always true or always false due to the limited range of the data type
 677
 678 Wuninitialized
 679 Common Var(warn_uninitialized) Warning EnabledBy(Wextra)
 680 Warn about uninitialized automatic variables
 681
 682 Wmaybe-uninitialized
 683 Common Var(warn_maybe_uninitialized) Warning EnabledBy(Wuninitialized)
 684 Warn about maybe uninitialized automatic variables
 685
 686 Wunreachable-code
 687 Common Ignore
 688 Does nothing. Preserved for backward compatibility.
 689
 690 Wunused
 691 Common Var(warn_unused) Init(0) Warning
 692 Enable all -Wunused- warnings
 693
 694 Wunused-but-set-parameter
 695 Common Var(warn_unused_but_set_parameter) Warning EnabledBy(Wunused && Wextra)
 696 Warn when a function parameter is only set, otherwise unused
 697
 698 Wunused-but-set-variable
 699 Common Var(warn_unused_but_set_variable) Warning EnabledBy(Wunused)
 700 Warn when a variable is only set, otherwise unused
 701
 702 Wunused-function
 703 Common Var(warn_unused_function) Warning EnabledBy(Wunused)
 704 Warn when a function is unused
 705
 706 Wunused-label
 707 Common Var(warn_unused_label) Warning EnabledBy(Wunused)
 708 Warn when a label is unused
 709
 710 Wunused-parameter
 711 Common Var(warn_unused_parameter) Warning EnabledBy(Wunused && Wextra)
 712 Warn when a function parameter is unused
 713
 714 Wunused-value
 715 Common Var(warn_unused_value) Warning EnabledBy(Wunused)
 716 Warn when an expression value is unused
 717
 718 Wunused-variable
 719 Common Var(warn_unused_variable) Warning EnabledBy(Wunused)
 720 Warn when a variable is unused
 721
 722 Wcoverage-mismatch
 723 Common Var(warn_coverage_mismatch) Init(1) Warning
 724 Warn in case profiles in -fprofile-use do not match
 725
 726 Wvector-operation-performance
 727 Common Var(warn_vector_operation_performance) Warning
 728 Warn when a vector operation is compiled outside the SIMD
 729
 730 Xassembler
 731 Driver Separate
 732
 733 Xlinker
 734 Driver Separate
 735
 736 Xpreprocessor
 737 Driver Separate
 738
 739 Z
 740 Driver
 741
 742 aux-info
 743 Common Separate Var(aux_info_file_name)
 744 -aux-info <file>        Emit declaration information into <file>
 745
 746 aux-info=
 747 Common Joined Alias(aux-info)
 748
 749 auxbase
 750 Common Separate RejectDriver Var(aux_base_name)
 751
 752 auxbase-strip
 753 Common Separate RejectDriver
 754
 755 coverage
 756 Driver
 757
 758 c
 759 Driver
 760
 761 d
 762 Common Joined
 763 -d<letters>     Enable dumps from specific passes of the compiler
 764
 765 dumpbase
 766 Common Separate Var(dump_base_name)
 767 -dumpbase <file>        Set the file basename to be used for dumps
 768
 769 dumpdir
 770 Common Separate Var(dump_dir_name)
 771 -dumpdir <dir>  Set the directory name to be used for dumps
 772
 773 dumpmachine
 774 Driver
 775
 776 dumpspecs
 777 Driver
 778
 779 dumpversion
 780 Driver
 781
 782 e
 783 Driver Joined Separate
 784
 785 ; This option has historically been passed down to the linker by an
 786 ; accident of a %{e*} spec, so ensure it continues to be passed down
 787 ; as a single option.  The supported option for this purpose is
 788 ; -rdynamic.  See PR 47390.
 789 export-dynamic
 790 Driver Undocumented
 791
 792 ; The version of the C++ ABI in use.  The following values are allowed:
 793 ;
 794 ; 0: The version of the ABI believed most conformant with the C++ ABI
 795 ;    specification.  This ABI may change as bugs are discovered and fixed.
 796 ;    Therefore, 0 will not necessarily indicate the same ABI in different
 797 ;    versions of G++.
 798 ;
 799 ; 1: The version of the ABI first used in G++ 3.2.  No longer selectable.
 800 ;
 801 ; 2: The version of the ABI first used in G++ 3.4 (and current default).
 802 ;
 803 ; 3: The version of the ABI that fixes the missing underscore
 804 ;    in template non-type arguments of pointer type.
 805 ;
 806 ; 4: The version of the ABI that introduces unambiguous mangling of
 807 ;    vector types.  First selectable in G++ 4.5.
 808 ;
 809 ; 5: The version of the ABI that ignores attribute const/noreturn
 810 ;    in function pointer mangling, and corrects mangling of decltype and
 811 ;    function parameters used in other parameters and the return type.
 812 ;    First selectable in G++ 4.6.
 813 ;
 814 ; 6: The version of the ABI that doesn't promote scoped enums to int and
 815 ;    changes the mangling of template argument packs, const/static_cast,
 816 ;    prefix ++ and --, and a class scope function used as a template
 817 ;    argument.
 818 ;    First selectable in G++ 4.7.
 819 ;
 820 ; 7: The version of the ABI that treats nullptr_t as a builtin type and
 821 ;    corrects the mangling of lambdas in default argument scope.
 822 ;    First selectable in G++ 4.8.
 823 ;
 824 ; 8: The version of the ABI that corrects the substitution behavior of
 825 ;    function types with function-cv-qualifiers.
 826 ;    First selectable in G++ 4.9.
 827 ;
 828 ; Additional positive integers will be assigned as new versions of
 829 ; the ABI become the default version of the ABI.
 830 fabi-version=
 831 Common Joined RejectNegative UInteger Var(flag_abi_version) Init(0)
 832 The version of the C++ ABI in use
 833
 834 faggressive-loop-optimizations
 835 Common Report Var(flag_aggressive_loop_optimizations) Optimization Init(1)
 836 Aggressively optimize loops using language constraints
 837
 838 falign-functions
 839 Common Report Var(align_functions,0) Optimization UInteger
 840 Align the start of functions
 841
 842 falign-functions=
 843 Common RejectNegative Joined UInteger Var(align_functions)
 844
 845 falign-jumps
 846 Common Report Var(align_jumps,0) Optimization UInteger
 847 Align labels which are only reached by jumping
 848
 849 falign-jumps=
 850 Common RejectNegative Joined UInteger Var(align_jumps)
 851
 852 falign-labels
 853 Common Report Var(align_labels,0) Optimization UInteger
 854 Align all labels
 855
 856 falign-labels=
 857 Common RejectNegative Joined UInteger Var(align_labels)
 858
 859 falign-loops
 860 Common Report Var(align_loops,0) Optimization UInteger
 861 Align the start of loops
 862
 863 falign-loops=
 864 Common RejectNegative Joined UInteger Var(align_loops)
 865
 866 fargument-alias
 867 Common Ignore
 868 Does nothing. Preserved for backward compatibility.
 869
 870 fargument-noalias
 871 Common Ignore
 872 Does nothing. Preserved for backward compatibility.
 873
 874 fargument-noalias-global
 875 Common Ignore
 876 Does nothing. Preserved for backward compatibility.
 877
 878 fargument-noalias-anything
 879 Common Ignore
 880 Does nothing. Preserved for backward compatibility.
 881
 882 fsanitize=
 883 Common Driver Report Joined
 884 Select what to sanitize
 885
 886 fasan-shadow-offset=
 887 Common Joined RejectNegative Var(common_deferred_options) Defer
 888 -fasan-shadow-offset=<number>   Use custom shadow memory offset.
 889
 890 fsanitize-recover=
 891 Common Report Joined
 892 After diagnosing undefined behavior attempt to continue execution
 893
 894 fsanitize-recover
 895 Common Report
 896 This switch is deprecated; use -fsanitize-recover= instead
 897
 898 fsanitize-undefined-trap-on-error
 899 Common Report Var(flag_sanitize_undefined_trap_on_error) Init(0)
 900 Use trap instead of a library function for undefined behavior sanitization
 901
 902 fasynchronous-unwind-tables
 903 Common Report Var(flag_asynchronous_unwind_tables) Optimization
 904 Generate unwind tables that are exact at each instruction boundary
 905
 906 fauto-inc-dec
 907 Common Report Var(flag_auto_inc_dec) Init(1)
 908 Generate auto-inc/dec instructions
 909
 910 fauto-profile
 911 Common Report Var(flag_auto_profile) Optimization
 912 Use sample profile information for call graph node weights. The default
 913 profile file is fbdata.afdo in 'pwd'.
 914
 915 fauto-profile=
 916 Common Joined RejectNegative Var(auto_profile_file)
 917 Use sample profile information for call graph node weights. The profile
 918 file is specified in the argument.
 919
 920 ; -fcheck-bounds causes gcc to generate array bounds checks.
 921 ; For C, C++ and ObjC: defaults off.
 922 ; For Java: defaults to on.
 923 ; For Fortran: defaults to off.
 924 fbounds-check
 925 Common Report Var(flag_bounds_check)
 926 Generate code to check bounds before indexing arrays
 927
 928 fbranch-count-reg
 929 Common Report Var(flag_branch_on_count_reg) Optimization
 930 Replace add, compare, branch with branch on count register
 931
 932 fbranch-probabilities
 933 Common Report Var(flag_branch_probabilities) Optimization
 934 Use profiling information for branch probabilities
 935
 936 fbranch-target-load-optimize
 937 Common Report Var(flag_branch_target_load_optimize) Optimization
 938 Perform branch target load optimization before prologue / epilogue threading
 939
 940 fbranch-target-load-optimize2
 941 Common Report Var(flag_branch_target_load_optimize2) Optimization
 942 Perform branch target load optimization after prologue / epilogue threading
 943
 944 fbtr-bb-exclusive
 945 Common Report Var(flag_btr_bb_exclusive) Optimization
 946 Restrict target load migration not to re-use registers in any basic block
 947
 948 fcall-saved-
 949 Common Joined RejectNegative Var(common_deferred_options) Defer
 950 -fcall-saved-<register> Mark <register> as being preserved across functions
 951
 952 fcall-used-
 953 Common Joined RejectNegative Var(common_deferred_options) Defer
 954 -fcall-used-<register>  Mark <register> as being corrupted by function calls
 955
 956 ; Nonzero for -fcaller-saves: allocate values in regs that need to
 957 ; be saved across function calls, if that produces overall better code.
 958 ; Optional now, so people can test it.
 959 fcaller-saves
 960 Common Report Var(flag_caller_saves) Optimization
 961 Save registers around function calls
 962
 963 fcheck-data-deps
 964 Common Report Var(flag_check_data_deps)
 965 Compare the results of several data dependence analyzers.
 966
 967 fcheck-new
 968 Common Var(flag_check_new)
 969 Check the return value of new in C++
 970
 971 fcombine-stack-adjustments
 972 Common Report Var(flag_combine_stack_adjustments) Optimization
 973 Looks for opportunities to reduce stack adjustments and stack references.
 974
 975 fcommon
 976 Common Report Var(flag_no_common,0) Optimization
 977 Do not put uninitialized globals in the common section
 978
 979 fcompare-debug
 980 Driver
 981 ; Converted by the driver to -fcompare-debug= options.
 982
 983 fcompare-debug=
 984 Common Driver JoinedOrMissing RejectNegative Var(flag_compare_debug_opt)
 985 -fcompare-debug[=<opts>]        Compile with and without e.g. -gtoggle, and compare the final-insns dump
 986
 987 fcompare-debug-second
 988 Common Driver RejectNegative Var(flag_compare_debug)
 989 Run only the second compilation of -fcompare-debug
 990
 991 fcompare-elim
 992 Common Report Var(flag_compare_elim_after_reload) Optimization
 993 Perform comparison elimination after register allocation has finished
 994
 995 fconserve-stack
 996 Common Var(flag_conserve_stack) Optimization
 997 Do not perform optimizations increasing noticeably stack usage
 998
 999 fcprop-registers
1000 Common Report Var(flag_cprop_registers) Optimization
1001 Perform a register copy-propagation optimization pass
1002
1003 fcrossjumping
1004 Common Report Var(flag_crossjumping) Optimization
1005 Perform cross-jumping optimization
1006
1007 fcse-follow-jumps
1008 Common Report Var(flag_cse_follow_jumps) Optimization
1009 When running CSE, follow jumps to their targets
1010
1011 fcse-skip-blocks
1012 Common Ignore
1013 Does nothing.  Preserved for backward compatibility.
1014
1015 fcx-limited-range
1016 Common Report Var(flag_cx_limited_range) Optimization SetByCombined
1017 Omit range reduction step when performing complex division
1018
1019 fcx-fortran-rules
1020 Common Report Var(flag_cx_fortran_rules) Optimization
1021 Complex multiplication and division follow Fortran rules
1022
1023 fdata-sections
1024 Common Report Var(flag_data_sections) Optimization
1025 Place data items into their own section
1026
1027 fdbg-cnt-list
1028 Common Report Var(common_deferred_options) Defer
1029 List all available debugging counters with their limits and counts.
1030
1031 fdbg-cnt=
1032 Common RejectNegative Joined Var(common_deferred_options) Defer
1033 -fdbg-cnt=<counter>:<limit>[,<counter>:<limit>,...]     Set the debug counter limit.
1034
1035 fdebug-prefix-map=
1036 Common Joined RejectNegative Var(common_deferred_options) Defer
1037 Map one directory name to another in debug information
1038
1039 fdebug-types-section
1040 Common Report Var(flag_debug_types_section) Init(0)
1041 Output .debug_types section when using DWARF v4 debuginfo.
1042
1043 ; Nonzero for -fdefer-pop: don't pop args after each function call
1044 ; instead save them up to pop many calls' args with one insns.
1045 fdefer-pop
1046 Common Report Var(flag_defer_pop) Optimization
1047 Defer popping functions args from stack until later
1048
1049 fdelayed-branch
1050 Common Report Var(flag_delayed_branch) Optimization
1051 Attempt to fill delay slots of branch instructions
1052
1053 fdelete-dead-exceptions
1054 Common Report Var(flag_delete_dead_exceptions) Init(0)
1055 Delete dead instructions that may throw exceptions
1056
1057 fdelete-null-pointer-checks
1058 Common Report Var(flag_delete_null_pointer_checks) Init(1) Optimization
1059 Delete useless null pointer checks
1060
1061 fdevirtualize-speculatively
1062 Common Report Var(flag_devirtualize_speculatively) Optimization
1063 Perform speculative devirtualization
1064
1065 fdevirtualize
1066 Common Report Var(flag_devirtualize) Optimization
1067 Try to convert virtual calls to direct ones.
1068
1069 fdiagnostics-show-location=
1070 Common Joined RejectNegative Enum(diagnostic_prefixing_rule)
1071 -fdiagnostics-show-location=[once|every-line]   How often to emit source location at the beginning of line-wrapped diagnostics
1072
1073 ; Required for these enum values.
1074 SourceInclude
1075 pretty-print.h
1076
1077 Enum
1078 Name(diagnostic_prefixing_rule) Type(int)
1079
1080 EnumValue
1081 Enum(diagnostic_prefixing_rule) String(once) Value(DIAGNOSTICS_SHOW_PREFIX_ONCE)
1082
1083 EnumValue
1084 Enum(diagnostic_prefixing_rule) String(every-line) Value(DIAGNOSTICS_SHOW_PREFIX_EVERY_LINE)
1085
1086 fdiagnostics-show-caret
1087 Common Var(flag_diagnostics_show_caret) Init(1)
1088 Show the source line with a caret indicating the column
1089
1090 fdiagnostics-color
1091 Common Alias(fdiagnostics-color=,always,never)
1092 ;
1093
1094 fdiagnostics-color=
1095 Common Joined RejectNegative Var(flag_diagnostics_show_color) Enum(diagnostic_color_rule) Init(DIAGNOSTICS_COLOR_NO)
1096 -fdiagnostics-color=[never|always|auto] Colorize diagnostics
1097
1098 ; Required for these enum values.
1099 SourceInclude
1100 diagnostic-color.h
1101
1102 Enum
1103 Name(diagnostic_color_rule) Type(int)
1104
1105 EnumValue
1106 Enum(diagnostic_color_rule) String(never) Value(DIAGNOSTICS_COLOR_NO)
1107
1108 EnumValue
1109 Enum(diagnostic_color_rule) String(always) Value(DIAGNOSTICS_COLOR_YES)
1110
1111 EnumValue
1112 Enum(diagnostic_color_rule) String(auto) Value(DIAGNOSTICS_COLOR_AUTO)
1113
1114 fdiagnostics-show-option
1115 Common Var(flag_diagnostics_show_option) Init(1)
1116 Amend appropriate diagnostic messages with the command line option that controls them
1117
1118 fdisable-
1119 Common Joined RejectNegative Var(common_deferred_options) Defer
1120 -fdisable-[tree|rtl|ipa]-<pass>=range1+range2 disables an optimization pass
1121
1122 fenable-
1123 Common Joined RejectNegative Var(common_deferred_options) Defer
1124 -fenable-[tree|rtl|ipa]-<pass>=range1+range2 enables an optimization pass
1125
1126 fdump-
1127 Common Joined RejectNegative Var(common_deferred_options) Defer
1128 -fdump-<type>   Dump various compiler internals to a file
1129
1130 fdump-final-insns
1131 Driver RejectNegative
1132
1133 fdump-final-insns=
1134 Common RejectNegative Joined Var(flag_dump_final_insns)
1135 -fdump-final-insns=filename     Dump to filename the insns at the end of translation
1136
1137 fdump-go-spec=
1138 Common RejectNegative Joined Var(flag_dump_go_spec)
1139 -fdump-go-spec=filename Write all declarations to file as Go code
1140
1141 fdump-noaddr
1142 Common Report Var(flag_dump_noaddr)
1143 Suppress output of addresses in debugging dumps
1144
1145 freport-bug
1146 Common Driver Var(flag_report_bug)
1147 Collect and dump debug information into temporary file if ICE in C/C++
1148 compiler occured.
1149
1150 fdump-passes
1151 Common Var(flag_dump_passes) Init(0)
1152 Dump optimization passes
1153
1154 fdump-unnumbered
1155 Common Report Var(flag_dump_unnumbered)
1156 Suppress output of instruction numbers, line number notes and addresses in debugging dumps
1157
1158 fdump-unnumbered-links
1159 Common Report Var(flag_dump_unnumbered_links)
1160 Suppress output of previous and next insn numbers in debugging dumps
1161
1162 fdwarf2-cfi-asm
1163 Common Report Var(flag_dwarf2_cfi_asm) Init(HAVE_GAS_CFI_DIRECTIVE)
1164 Enable CFI tables via GAS assembler directives.
1165
1166 fearly-inlining
1167 Common Report Var(flag_early_inlining) Init(1) Optimization
1168 Perform early inlining
1169
1170 feliminate-dwarf2-dups
1171 Common Report Var(flag_eliminate_dwarf2_dups)
1172 Perform DWARF2 duplicate elimination
1173
1174 fipa-sra
1175 Common Report Var(flag_ipa_sra) Init(0) Optimization
1176 Perform interprocedural reduction of aggregates
1177
1178 feliminate-unused-debug-symbols
1179 Common Report Var(flag_debug_only_used_symbols)
1180 Perform unused type elimination in debug info
1181
1182 feliminate-unused-debug-types
1183 Common Report Var(flag_eliminate_unused_debug_types) Init(1)
1184 Perform unused type elimination in debug info
1185
1186 femit-class-debug-always
1187 Common Report Var(flag_emit_class_debug_always) Init(0)
1188 Do not suppress C++ class debug information.
1189
1190 fexceptions
1191 Common Report Var(flag_exceptions) Optimization
1192 Enable exception handling
1193
1194 fexpensive-optimizations
1195 Common Report Var(flag_expensive_optimizations) Optimization
1196 Perform a number of minor, expensive optimizations
1197
1198 fexcess-precision=
1199 Common Joined RejectNegative Enum(excess_precision) Var(flag_excess_precision_cmdline) Init(EXCESS_PRECISION_DEFAULT)
1200 -fexcess-precision=[fast|standard]      Specify handling of excess floating-point precision
1201
1202 Enum
1203 Name(excess_precision) Type(enum excess_precision) UnknownError(unknown excess precision style %qs)
1204
1205 EnumValue
1206 Enum(excess_precision) String(fast) Value(EXCESS_PRECISION_FAST)
1207
1208 EnumValue
1209 Enum(excess_precision) String(standard) Value(EXCESS_PRECISION_STANDARD)
1210
1211 ffast-math
1212 Common
1213
1214 ffat-lto-objects
1215 Common Var(flag_fat_lto_objects)
1216 Output lto objects containing both the intermediate language and binary output.
1217
1218 ffinite-math-only
1219 Common Report Var(flag_finite_math_only) Optimization SetByCombined
1220 Assume no NaNs or infinities are generated
1221
1222 ffixed-
1223 Common Joined RejectNegative Var(common_deferred_options) Defer
1224 -ffixed-<register>      Mark <register> as being unavailable to the compiler
1225
1226 ffloat-store
1227 Common Report Var(flag_float_store) Optimization
1228 Don't allocate floats and doubles in extended-precision registers
1229
1230 fforce-addr
1231 Common Ignore
1232 Does nothing.  Preserved for backward compatibility.
1233
1234 fforward-propagate
1235 Common Report Var(flag_forward_propagate) Optimization
1236 Perform a forward propagation pass on RTL
1237
1238 ffp-contract=
1239 Common Joined RejectNegative Enum(fp_contract_mode) Var(flag_fp_contract_mode) Init(FP_CONTRACT_FAST)
1240 -ffp-contract=[off|on|fast] Perform floating-point expression contraction.
1241
1242 Enum
1243 Name(fp_contract_mode) Type(enum fp_contract_mode) UnknownError(unknown floating point contraction style %qs)
1244
1245 EnumValue
1246 Enum(fp_contract_mode) String(off) Value(FP_CONTRACT_OFF)
1247
1248 ; Not implemented, fall back to conservative FP_CONTRACT_OFF.
1249 EnumValue
1250 Enum(fp_contract_mode) String(on) Value(FP_CONTRACT_OFF)
1251
1252 EnumValue
1253 Enum(fp_contract_mode) String(fast) Value(FP_CONTRACT_FAST)
1254
1255 ; Nonzero means don't put addresses of constant functions in registers.
1256 ; Used for compiling the Unix kernel, where strange substitutions are
1257 ; done on the assembly output.
1258 ffunction-cse
1259 Common Report Var(flag_no_function_cse,0)
1260 Allow function addresses to be held in registers
1261
1262 ffunction-sections
1263 Common Report Var(flag_function_sections)
1264 Place each function into its own section
1265
1266 fgcse
1267 Common Report Var(flag_gcse) Optimization
1268 Perform global common subexpression elimination
1269
1270 fgcse-lm
1271 Common Report Var(flag_gcse_lm) Init(1) Optimization
1272 Perform enhanced load motion during global common subexpression elimination
1273
1274 fgcse-sm
1275 Common Report Var(flag_gcse_sm) Init(0) Optimization
1276 Perform store motion after global common subexpression elimination
1277
1278 fgcse-las
1279 Common Report Var(flag_gcse_las) Init(0) Optimization
1280 Perform redundant load after store elimination in global common subexpression
1281 elimination
1282
1283 fgcse-after-reload
1284 Common Report Var(flag_gcse_after_reload) Optimization
1285 Perform global common subexpression elimination after register allocation
1286 has finished
1287
1288 ; This option is not documented yet as its semantics will change.
1289 fgraphite
1290 Common Report Var(flag_graphite)
1291 Enable in and out of Graphite representation
1292
1293 fgraphite-identity
1294 Common Report Var(flag_graphite_identity) Optimization
1295 Enable Graphite Identity transformation
1296
1297 fhoist-adjacent-loads
1298 Common Report Var(flag_hoist_adjacent_loads) Optimization
1299 Enable hoisting adjacent loads to encourage generating conditional move
1300 instructions
1301
1302 floop-parallelize-all
1303 Common Report Var(flag_loop_parallelize_all) Optimization
1304 Mark all loops as parallel
1305
1306 floop-strip-mine
1307 Common Report Var(flag_loop_strip_mine) Optimization
1308 Enable Loop Strip Mining transformation
1309
1310 floop-interchange
1311 Common Report Var(flag_loop_interchange) Optimization
1312 Enable Loop Interchange transformation
1313
1314 floop-block
1315 Common Report Var(flag_loop_block) Optimization
1316 Enable Loop Blocking transformation
1317
1318 floop-unroll-and-jam
1319 Common Report Var(flag_loop_unroll_jam) Optimization
1320 Enable Loop Unroll Jam transformation
1321
1322 fgnu-tm
1323 Common Report Var(flag_tm)
1324 Enable support for GNU transactional memory
1325
1326 fgnu-unique
1327 Common Report Var(flag_gnu_unique) Init(1)
1328 Use STB_GNU_UNIQUE if supported by the assembler
1329
1330 floop-flatten
1331 Common Ignore
1332 Does nothing. Preserved for backward compatibility.
1333
1334 floop-nest-optimize
1335 Common Report Var(flag_loop_optimize_isl) Optimization
1336 Enable the ISL based loop nest optimizer
1337
1338 fstrict-volatile-bitfields
1339 Common Report Var(flag_strict_volatile_bitfields) Init(-1)
1340 Force bitfield accesses to match their type width
1341
1342 fguess-branch-probability
1343 Common Report Var(flag_guess_branch_prob) Optimization
1344 Enable guessing of branch probabilities
1345
1346 ; Nonzero means ignore `#ident' directives.  0 means handle them.
1347 ; Generate position-independent code for executables if possible
1348 ; On SVR4 targets, it also controls whether or not to emit a
1349 ; string identifying the compiler.
1350 fident
1351 Common Report Var(flag_no_ident,0)
1352 Process #ident directives
1353
1354 fif-conversion
1355 Common Report Var(flag_if_conversion) Optimization
1356 Perform conversion of conditional jumps to branchless equivalents
1357
1358 fif-conversion2
1359 Common Report Var(flag_if_conversion2) Optimization
1360 Perform conversion of conditional jumps to conditional execution
1361
1362 fstack-reuse=
1363 Common Joined RejectNegative Enum(stack_reuse_level) Var(flag_stack_reuse) Init(SR_ALL)
1364 -fstack-reuse=[all|named_vars|none] Set stack reuse level for local variables.
1365
1366 Enum
1367 Name(stack_reuse_level) Type(enum stack_reuse_level) UnknownError(unknown Stack Reuse Level %qs)
1368
1369 EnumValue
1370 Enum(stack_reuse_level) String(all) Value(SR_ALL)
1371
1372 EnumValue
1373 Enum(stack_reuse_level) String(named_vars) Value(SR_NAMED_VARS)
1374
1375 EnumValue
1376 Enum(stack_reuse_level) String(none) Value(SR_NONE)
1377
1378 ftree-loop-if-convert
1379 Common Report Var(flag_tree_loop_if_convert) Init(-1) Optimization
1380 Convert conditional jumps in innermost loops to branchless equivalents
1381
1382 ftree-loop-if-convert-stores
1383 Common Report Var(flag_tree_loop_if_convert_stores) Optimization
1384 Also if-convert conditional jumps containing memory writes
1385
1386 ; -finhibit-size-directive inhibits output of .size for ELF.
1387 ; This is used only for compiling crtstuff.c,
1388 ; and it may be extended to other effects
1389 ; needed for crtstuff.c on other systems.
1390 finhibit-size-directive
1391 Common Report Var(flag_inhibit_size_directive)
1392 Do not generate .size directives
1393
1394 findirect-inlining
1395 Common Report Var(flag_indirect_inlining)
1396 Perform indirect inlining
1397
1398 ; General flag to enable inlining.  Specifying -fno-inline will disable
1399 ; all inlining apart from always-inline functions.
1400 finline
1401 Common Report Var(flag_no_inline,0) Init(0) Optimization
1402 Enable inlining of function declared \"inline\", disabling disables all inlining
1403
1404 finline-small-functions
1405 Common Report Var(flag_inline_small_functions) Optimization
1406 Integrate functions into their callers when code size is known not to grow
1407
1408 finline-functions
1409 Common Report Var(flag_inline_functions) Optimization
1410 Integrate functions not declared \"inline\" into their callers when profitable
1411
1412 finline-functions-called-once
1413 Common Report Var(flag_inline_functions_called_once) Optimization
1414 Integrate functions only required by their single caller
1415
1416 finline-limit-
1417 Common RejectNegative Joined Alias(finline-limit=)
1418
1419 finline-limit=
1420 Common RejectNegative Joined UInteger
1421 -finline-limit=<number> Limit the size of inlined functions to <number>
1422
1423 finline-atomics
1424 Common Report Var(flag_inline_atomics) Init(1) Optimization
1425 Inline __atomic operations when a lock free instruction sequence is available.
1426
1427 finstrument-functions
1428 Common Report Var(flag_instrument_function_entry_exit)
1429 Instrument function entry and exit with profiling calls
1430
1431 finstrument-functions-exclude-function-list=
1432 Common RejectNegative Joined
1433 -finstrument-functions-exclude-function-list=name,...  Do not instrument listed functions
1434
1435 finstrument-functions-exclude-file-list=
1436 Common RejectNegative Joined
1437 -finstrument-functions-exclude-file-list=filename,...  Do not instrument functions listed in files
1438
1439 fipa-cp
1440 Common Report Var(flag_ipa_cp) Optimization
1441 Perform interprocedural constant propagation
1442
1443 fipa-cp-clone
1444 Common Report Var(flag_ipa_cp_clone) Optimization
1445 Perform cloning to make Interprocedural constant propagation stronger
1446
1447 fipa-profile
1448 Common Report Var(flag_ipa_profile) Init(0) Optimization
1449 Perform interprocedural profile propagation
1450
1451 fipa-pta
1452 Common Report Var(flag_ipa_pta) Init(0) Optimization
1453 Perform interprocedural points-to analysis
1454
1455 fipa-pure-const
1456 Common Report Var(flag_ipa_pure_const) Init(0) Optimization
1457 Discover pure and const functions
1458
1459 fipa-icf
1460 Common Report Var(flag_ipa_icf) Optimization
1461 Perform Identical Code Folding for functions and read-only variables
1462
1463 fipa-icf-functions
1464 Common Report Var(flag_ipa_icf_functions) Optimization
1465 Perform Identical Code Folding for functions
1466
1467 fipa-icf-variables
1468 Common Report Var(flag_ipa_icf_variables) Optimization
1469 Perform Identical Code Folding for variables
1470
1471 fipa-reference
1472 Common Report Var(flag_ipa_reference) Init(0) Optimization
1473 Discover readonly and non addressable static variables
1474
1475 fipa-matrix-reorg
1476 Common Ignore
1477 Does nothing. Preserved for backward compatibility.
1478
1479 fipa-struct-reorg
1480 Common Ignore
1481 Does nothing. Preserved for backward compatibility.
1482
1483 fira-algorithm=
1484 Common Joined RejectNegative Enum(ira_algorithm) Var(flag_ira_algorithm) Init(IRA_ALGORITHM_CB)
1485 -fira-algorithm=[CB|priority] Set the used IRA algorithm
1486
1487 Enum
1488 Name(ira_algorithm) Type(enum ira_algorithm) UnknownError(unknown IRA algorithm %qs)
1489
1490 EnumValue
1491 Enum(ira_algorithm) String(CB) Value(IRA_ALGORITHM_CB)
1492
1493 EnumValue
1494 Enum(ira_algorithm) String(priority) Value(IRA_ALGORITHM_PRIORITY)
1495
1496 fira-region=
1497 Common Joined RejectNegative Enum(ira_region) Var(flag_ira_region) Init(IRA_REGION_AUTODETECT)
1498 -fira-region=[one|all|mixed] Set regions for IRA
1499
1500 Enum
1501 Name(ira_region) Type(enum ira_region) UnknownError(unknown IRA region %qs)
1502
1503 EnumValue
1504 Enum(ira_region) String(one) Value(IRA_REGION_ONE)
1505
1506 EnumValue
1507 Enum(ira_region) String(all) Value(IRA_REGION_ALL)
1508
1509 EnumValue
1510 Enum(ira_region) String(mixed) Value(IRA_REGION_MIXED)
1511
1512 fira-hoist-pressure
1513 Common Report Var(flag_ira_hoist_pressure) Init(1) Optimization
1514 Use IRA based register pressure calculation
1515 in RTL hoist optimizations.
1516
1517 fira-loop-pressure
1518 Common Report Var(flag_ira_loop_pressure) Optimization
1519 Use IRA based register pressure calculation
1520 in RTL loop optimizations.
1521
1522 fira-share-save-slots
1523 Common Report Var(flag_ira_share_save_slots) Init(1)
1524 Share slots for saving different hard registers.
1525
1526 fira-share-spill-slots
1527 Common Report Var(flag_ira_share_spill_slots) Init(1)
1528 Share stack slots for spilled pseudo-registers.
1529
1530 fira-verbose=
1531 Common RejectNegative Joined UInteger Var(flag_ira_verbose) Init(5)
1532 -fira-verbose=<number>  Control IRA's level of diagnostic messages.
1533
1534 fivopts
1535 Common Report Var(flag_ivopts) Init(1) Optimization
1536 Optimize induction variables on trees
1537
1538 fjump-tables
1539 Common Var(flag_jump_tables) Init(1) Optimization
1540 Use jump tables for sufficiently large switch statements
1541
1542 fkeep-inline-functions
1543 Common Report Var(flag_keep_inline_functions)
1544 Generate code for functions even if they are fully inlined
1545
1546 fkeep-static-consts
1547 Common Report Var(flag_keep_static_consts) Init(1)
1548 Emit static const variables even if they are not used
1549
1550 fleading-underscore
1551 Common Report Var(flag_leading_underscore) Init(-1)
1552 Give external symbols a leading underscore
1553
1554 floop-optimize
1555 Common Ignore
1556 Does nothing.  Preserved for backward compatibility.
1557
1558 flra-remat
1559 Common Report Var(flag_lra_remat) Optimization
1560 Do CFG-sensitive rematerialization in LRA
1561
1562 flto
1563 Common
1564 Enable link-time optimization.
1565
1566 flto=
1567 Common RejectNegative Joined Var(flag_lto)
1568 Link-time optimization with number of parallel jobs or jobserver.
1569
1570 Enum
1571 Name(lto_partition_model) Type(enum lto_partition_model) UnknownError(unknown LTO partitioning model %qs)
1572
1573 EnumValue
1574 Enum(lto_partition_model) String(none) Value(LTO_PARTITION_NONE)
1575
1576 EnumValue
1577 Enum(lto_partition_model) String(one) Value(LTO_PARTITION_ONE)
1578
1579 EnumValue
1580 Enum(lto_partition_model) String(balanced) Value(LTO_PARTITION_BALANCED)
1581
1582 EnumValue
1583 Enum(lto_partition_model) String(1to1) Value(LTO_PARTITION_1TO1)
1584
1585 EnumValue
1586 Enum(lto_partition_model) String(max) Value(LTO_PARTITION_MAX)
1587
1588 flto-partition=
1589 Common Joined RejectNegative Enum(lto_partition_model) Var(flag_lto_partition) Init(LTO_PARTITION_BALANCED)
1590 Specify the algorithm to partition symbols and vars at linktime
1591
1592 ; The initial value of -1 comes from Z_DEFAULT_COMPRESSION in zlib.h.
1593 flto-compression-level=
1594 Common Joined RejectNegative UInteger Var(flag_lto_compression_level) Init(-1)
1595 -flto-compression-level=<number>        Use zlib compression level <number> for IL
1596
1597 flto-odr-type-merging
1598 Common Report Var(flag_lto_odr_type_mering) Init(1)
1599 Merge C++ types using One Definition Rule
1600
1601 flto-report
1602 Common Report Var(flag_lto_report) Init(0)
1603 Report various link-time optimization statistics
1604
1605 flto-report-wpa
1606 Common Report Var(flag_lto_report_wpa) Init(0)
1607 Report various link-time optimization statistics for WPA only
1608
1609 fmath-errno
1610 Common Report Var(flag_errno_math) Init(1) Optimization SetByCombined
1611 Set errno after built-in math functions
1612
1613 fmax-errors=
1614 Common Joined RejectNegative UInteger Var(flag_max_errors)
1615 -fmax-errors=<number>   Maximum number of errors to report
1616
1617 fmem-report
1618 Common Report Var(mem_report)
1619 Report on permanent memory allocation
1620
1621 fmem-report-wpa
1622 Common Report Var(mem_report_wpa)
1623 Report on permanent memory allocation in WPA only
1624
1625 ; This will attempt to merge constant section constants, if 1 only
1626 ; string constants and constants from constant pool, if 2 also constant
1627 ; variables.
1628 fmerge-all-constants
1629 Common Report Var(flag_merge_constants,2) Init(1) Optimization
1630 Attempt to merge identical constants and constant variables
1631
1632 fmerge-constants
1633 Common Report Var(flag_merge_constants,1) Optimization
1634 Attempt to merge identical constants across compilation units
1635
1636 fmerge-debug-strings
1637 Common Report Var(flag_merge_debug_strings) Init(1)
1638 Attempt to merge identical debug strings across compilation units
1639
1640 fmessage-length=
1641 Common RejectNegative Joined UInteger
1642 -fmessage-length=<number>       Limit diagnostics to <number> characters per line.  0 suppresses line-wrapping
1643
1644 fmodulo-sched
1645 Common Report Var(flag_modulo_sched) Optimization
1646 Perform SMS based modulo scheduling before the first scheduling pass
1647
1648 fmodulo-sched-allow-regmoves
1649 Common Report Var(flag_modulo_sched_allow_regmoves)
1650 Perform SMS based modulo scheduling with register moves allowed
1651
1652 fmove-loop-invariants
1653 Common Report Var(flag_move_loop_invariants) Optimization
1654 Move loop invariant computations out of loops
1655
1656 fdce
1657 Common Var(flag_dce) Init(1) Optimization
1658 Use the RTL dead code elimination pass
1659
1660 fdse
1661 Common Var(flag_dse) Init(1) Optimization
1662 Use the RTL dead store elimination pass
1663
1664 freschedule-modulo-scheduled-loops
1665 Common Report Var(flag_resched_modulo_sched) Optimization
1666 Enable/Disable the traditional scheduling in loops that already passed modulo scheduling
1667
1668 fnon-call-exceptions
1669 Common Report Var(flag_non_call_exceptions) Optimization
1670 Support synchronous non-call exceptions
1671
1672 foffload=
1673 Common Driver Joined MissingArgError(options or targets missing after %qs)
1674 -foffload=<targets>=<options>  Specify offloading targets and options for them
1675
1676 foffload-abi=
1677 Common Joined RejectNegative Enum(offload_abi) Var(flag_offload_abi) Init(OFFLOAD_ABI_UNSET)
1678 -foffload-abi=[lp64|ilp32]     Set the ABI to use in an offload compiler
1679
1680 Enum
1681 Name(offload_abi) Type(enum offload_abi) UnknownError(unknown offload ABI %qs)
1682
1683 EnumValue
1684 Enum(offload_abi) String(ilp32) Value(OFFLOAD_ABI_ILP32)
1685
1686 EnumValue
1687 Enum(offload_abi) String(lp64) Value(OFFLOAD_ABI_LP64)
1688
1689 fomit-frame-pointer
1690 Common Report Var(flag_omit_frame_pointer) Optimization
1691 When possible do not generate stack frames
1692
1693 fopt-info
1694 Common Report Var(flag_opt_info) Optimization
1695 Enable all optimization info dumps on stderr
1696
1697 fopt-info-
1698 Common Joined RejectNegative Var(common_deferred_options) Defer
1699 -fopt-info[-<type>=filename]    Dump compiler optimization details
1700
1701 foptimize-register-move
1702 Common Ignore
1703 Does nothing. Preserved for backward compatibility.
1704
1705 foptimize-sibling-calls
1706 Common Report Var(flag_optimize_sibling_calls) Optimization
1707 Optimize sibling and tail recursive calls
1708
1709 fpartial-inlining
1710 Common Report Var(flag_partial_inlining)
1711 Perform partial inlining
1712
1713 fpre-ipa-mem-report
1714 Common Report Var(pre_ipa_mem_report)
1715 Report on memory allocation before interprocedural optimization
1716
1717 fpost-ipa-mem-report
1718 Common Report Var(post_ipa_mem_report)
1719 Report on memory allocation before interprocedural optimization
1720
1721 fpack-struct
1722 Common Report Var(flag_pack_struct) Optimization
1723 Pack structure members together without holes
1724
1725 fpack-struct=
1726 Common RejectNegative Joined UInteger Optimization
1727 -fpack-struct=<number>  Set initial maximum structure member alignment
1728
1729 fpcc-struct-return
1730 Common Report Var(flag_pcc_struct_return,1) Init(DEFAULT_PCC_STRUCT_RETURN)
1731 Return small aggregates in memory, not registers
1732
1733 fpeel-loops
1734 Common Report Var(flag_peel_loops) Optimization
1735 Perform loop peeling
1736
1737 fpeephole
1738 Common Report Var(flag_no_peephole,0) Optimization
1739 Enable machine specific peephole optimizations
1740
1741 fpeephole2
1742 Common Report Var(flag_peephole2) Optimization
1743 Enable an RTL peephole pass before sched2
1744
1745 fPIC
1746 Common Report Var(flag_pic,2) Negative(fPIE)
1747 Generate position-independent code if possible (large mode)
1748
1749 fPIE
1750 Common Report Var(flag_pie,2) Negative(fpic)
1751 Generate position-independent code for executables if possible (large mode)
1752
1753 fpic
1754 Common Report Var(flag_pic,1) Negative(fpie)
1755 Generate position-independent code if possible (small mode)
1756
1757 fpie
1758 Common Report Var(flag_pie,1) Negative(fPIC)
1759 Generate position-independent code for executables if possible (small mode)
1760
1761 fplugin=
1762 Common Joined RejectNegative Var(common_deferred_options) Defer
1763 Specify a plugin to load
1764
1765 fplugin-arg-
1766 Common Joined RejectNegative Var(common_deferred_options) Defer
1767 -fplugin-arg-<name>-<key>[=<value>]     Specify argument <key>=<value> for plugin <name>
1768
1769 fpredictive-commoning
1770 Common Report Var(flag_predictive_commoning) Optimization
1771 Run predictive commoning optimization.
1772
1773 fprefetch-loop-arrays
1774 Common Report Var(flag_prefetch_loop_arrays) Init(-1) Optimization
1775 Generate prefetch instructions, if available, for arrays in loops
1776
1777 fprofile
1778 Common Report Var(profile_flag)
1779 Enable basic program profiling code
1780
1781 fprofile-arcs
1782 Common Report Var(profile_arc_flag)
1783 Insert arc-based program profiling code
1784
1785 fprofile-dir=
1786 Common Joined RejectNegative Var(profile_data_prefix)
1787 Set the top-level directory for storing the profile data.
1788 The default is 'pwd'.
1789
1790 fprofile-correction
1791 Common Report Var(flag_profile_correction)
1792 Enable correction of flow inconsistent profile data input
1793
1794 fprofile-generate
1795 Common
1796 Enable common options for generating profile info for profile feedback directed optimizations
1797
1798 fprofile-generate=
1799 Common Joined RejectNegative
1800 Enable common options for generating profile info for profile feedback directed optimizations, and set -fprofile-dir=
1801
1802 fprofile-use
1803 Common Var(flag_profile_use)
1804 Enable common options for performing profile feedback directed optimizations
1805
1806 fprofile-use=
1807 Common Joined RejectNegative
1808 Enable common options for performing profile feedback directed optimizations, and set -fprofile-dir=
1809
1810 fprofile-values
1811 Common Report Var(flag_profile_values)
1812 Insert code to profile values of expressions
1813
1814 fprofile-report
1815 Common Report Var(profile_report)
1816 Report on consistency of profile
1817
1818 fprofile-reorder-functions
1819 Common Report Var(flag_profile_reorder_functions)
1820 Enable function reordering that improves code placement
1821
1822 frandom-seed
1823 Common Var(common_deferred_options) Defer
1824
1825 frandom-seed=
1826 Common Joined RejectNegative Var(common_deferred_options) Defer
1827 -frandom-seed=<number>  Make compile reproducible using <number>
1828
1829 ; This switch causes the command line that was used to create an
1830 ; object file to be recorded into the object file.  The exact format
1831 ; of this recording is target and binary file format dependent.
1832 ; It is related to the -fverbose-asm switch, but that switch only
1833 ; records information in the assembler output file as comments, so
1834 ; they never reach the object file.
1835 frecord-gcc-switches
1836 Common Report Var(flag_record_gcc_switches)
1837 Record gcc command line switches in the object file.
1838
1839 freg-struct-return
1840 Common Report Var(flag_pcc_struct_return,0) Optimization
1841 Return small aggregates in registers
1842
1843 fregmove
1844 Common Ignore
1845 Does nothing. Preserved for backward compatibility.
1846
1847 flive-range-shrinkage
1848 Common Report Var(flag_live_range_shrinkage) Init(0) Optimization
1849 Relief of register pressure through live range shrinkage
1850
1851 frename-registers
1852 Common Report Var(flag_rename_registers) Init(2) Optimization
1853 Perform a register renaming optimization pass
1854
1855 fschedule-fusion
1856 Common Report Var(flag_schedule_fusion) Init(2) Optimization
1857 Perform a target dependent instruction fusion optimization pass
1858
1859 freorder-blocks
1860 Common Report Var(flag_reorder_blocks) Optimization
1861 Reorder basic blocks to improve code placement
1862
1863 freorder-blocks-and-partition
1864 Common Report Var(flag_reorder_blocks_and_partition) Optimization
1865 Reorder basic blocks and partition into hot and cold sections
1866
1867 freorder-functions
1868 Common Report Var(flag_reorder_functions) Optimization
1869 Reorder functions to improve code placement
1870
1871 frerun-cse-after-loop
1872 Common Report Var(flag_rerun_cse_after_loop) Optimization
1873 Add a common subexpression elimination pass after loop optimizations
1874
1875 frerun-loop-opt
1876 Common Ignore
1877 Does nothing.  Preserved for backward compatibility.
1878
1879 frounding-math
1880 Common Report Var(flag_rounding_math) Optimization SetByCombined
1881 Disable optimizations that assume default FP rounding behavior
1882
1883 fsched-interblock
1884 Common Report Var(flag_schedule_interblock) Init(1) Optimization
1885 Enable scheduling across basic blocks
1886
1887 fsched-pressure
1888 Common Report Var(flag_sched_pressure) Init(0) Optimization
1889 Enable register pressure sensitive insn scheduling
1890
1891 fsched-spec
1892 Common Report Var(flag_schedule_speculative) Init(1) Optimization
1893 Allow speculative motion of non-loads
1894
1895 fsched-spec-load
1896 Common Report Var(flag_schedule_speculative_load) Optimization
1897 Allow speculative motion of some loads
1898
1899 fsched-spec-load-dangerous
1900 Common Report Var(flag_schedule_speculative_load_dangerous) Optimization
1901 Allow speculative motion of more loads
1902
1903 fsched-verbose=
1904 Common RejectNegative Joined UInteger Var(sched_verbose_param)
1905 -fsched-verbose=<number>        Set the verbosity level of the scheduler
1906
1907 fsched2-use-superblocks
1908 Common Report Var(flag_sched2_use_superblocks) Optimization
1909 If scheduling post reload, do superblock scheduling
1910
1911 fsched2-use-traces
1912 Common Ignore
1913 Does nothing.  Preserved for backward compatibility.
1914
1915 fschedule-insns
1916 Common Report Var(flag_schedule_insns) Optimization
1917 Reschedule instructions before register allocation
1918
1919 fschedule-insns2
1920 Common Report Var(flag_schedule_insns_after_reload) Optimization
1921 Reschedule instructions after register allocation
1922
1923 ; This flag should be on when a target implements non-trivial
1924 ; scheduling hooks, maybe saving some information for its own sake.
1925 ; On IA64, for example, this is used for correct bundling.
1926 fselective-scheduling
1927 Common Report Var(flag_selective_scheduling) Optimization
1928 Schedule instructions using selective scheduling algorithm
1929
1930 fselective-scheduling2
1931 Common Report Var(flag_selective_scheduling2) Optimization
1932 Run selective scheduling after reload
1933
1934 fsel-sched-pipelining
1935 Common Report Var(flag_sel_sched_pipelining) Init(0) Optimization
1936 Perform software pipelining of inner loops during selective scheduling
1937
1938 fsel-sched-pipelining-outer-loops
1939 Common Report Var(flag_sel_sched_pipelining_outer_loops) Init(0) Optimization
1940 Perform software pipelining of outer loops during selective scheduling
1941
1942 fsel-sched-reschedule-pipelined
1943 Common Report Var(flag_sel_sched_reschedule_pipelined) Init(0) Optimization
1944 Reschedule pipelined regions without pipelining
1945
1946 fsemantic-interposition
1947 Common Report Var(flag_semantic_interposition) Init(1)
1948 Allow interposing function (or variables) by ones with different semantics (or initializer) respectively by dynamic linker
1949
1950 ; sched_stalled_insns means that insns can be moved prematurely from the queue
1951 ; of stalled insns into the ready list.
1952 fsched-stalled-insns
1953 Common Report Var(flag_sched_stalled_insns) Optimization UInteger
1954 Allow premature scheduling of queued insns
1955
1956 fsched-stalled-insns=
1957 Common RejectNegative Joined UInteger
1958 -fsched-stalled-insns=<number>  Set number of queued insns that can be prematurely scheduled
1959
1960 ; sched_stalled_insns_dep controls how many recently scheduled cycles will
1961 ; be examined for a dependency on a stalled insn that is candidate for
1962 ; premature removal from the queue of stalled insns into the ready list (has
1963 ; an effect only if the flag 'sched_stalled_insns' is set).
1964 fsched-stalled-insns-dep
1965 Common Report Var(flag_sched_stalled_insns_dep,1) Init(1) Optimization UInteger
1966 Set dependence distance checking in premature scheduling of queued insns
1967
1968 fsched-stalled-insns-dep=
1969 Common RejectNegative Joined UInteger
1970 -fsched-stalled-insns-dep=<number>      Set dependence distance checking in premature scheduling of queued insns
1971
1972 fsched-group-heuristic
1973 Common Report Var(flag_sched_group_heuristic) Init(1) Optimization
1974 Enable the group heuristic in the scheduler
1975
1976 fsched-critical-path-heuristic
1977 Common Report Var(flag_sched_critical_path_heuristic) Init(1) Optimization
1978 Enable the critical path heuristic in the scheduler
1979
1980 fsched-spec-insn-heuristic
1981 Common Report Var(flag_sched_spec_insn_heuristic) Init(1) Optimization
1982 Enable the speculative instruction heuristic in the scheduler
1983
1984 fsched-rank-heuristic
1985 Common Report Var(flag_sched_rank_heuristic) Init(1) Optimization
1986 Enable the rank heuristic in the scheduler
1987
1988 fsched-last-insn-heuristic
1989 Common Report Var(flag_sched_last_insn_heuristic) Init(1) Optimization
1990 Enable the last instruction heuristic in the scheduler
1991
1992 fsched-dep-count-heuristic
1993 Common Report Var(flag_sched_dep_count_heuristic) Init(1) Optimization
1994 Enable the dependent count heuristic in the scheduler
1995
1996 fsection-anchors
1997 Common Report Var(flag_section_anchors) Optimization
1998 Access data in the same section from shared anchor points
1999
2000 fsee
2001 Common Ignore
2002 Does nothing.  Preserved for backward compatibility.
2003
2004 fzee
2005 Common Ignore
2006 Does nothing.  Preserved for backward compatibility.
2007
2008 free
2009 Common Report Var(flag_ree) Init(0)
2010 Turn on Redundant Extensions Elimination pass.
2011
2012 fshow-column
2013 Common Report Var(flag_show_column) Init(1)
2014 Show column numbers in diagnostics, when available.  Default on
2015
2016 fshrink-wrap
2017 Common Report Var(flag_shrink_wrap) Optimization
2018 Emit function prologues only before parts of the function that need it,
2019 rather than at the top of the function.
2020
2021 fsignaling-nans
2022 Common Report Var(flag_signaling_nans) Optimization SetByCombined
2023 Disable optimizations observable by IEEE signaling NaNs
2024
2025 fsigned-zeros
2026 Common Report Var(flag_signed_zeros) Init(1) Optimization SetByCombined
2027 Disable floating point optimizations that ignore the IEEE signedness of zero
2028
2029 fsingle-precision-constant
2030 Common Report Var(flag_single_precision_constant) Optimization
2031 Convert floating point constants to single precision constants
2032
2033 fsplit-ivs-in-unroller
2034 Common Report Var(flag_split_ivs_in_unroller) Init(1) Optimization
2035 Split lifetimes of induction variables when loops are unrolled
2036
2037 fsplit-stack
2038 Common Report Var(flag_split_stack) Init(-1)
2039 Generate discontiguous stack frames
2040
2041 fsplit-wide-types
2042 Common Report Var(flag_split_wide_types) Optimization
2043 Split wide types into independent registers
2044
2045 fssa-phiopt
2046 Common Report Var(flag_ssa_phiopt) Optimization
2047 Optimize conditional patterns using SSA PHI nodes
2048
2049 fvariable-expansion-in-unroller
2050 Common Report Var(flag_variable_expansion_in_unroller) Optimization
2051 Apply variable expansion when loops are unrolled
2052
2053 fstack-check=
2054 Common Report RejectNegative Joined
2055 -fstack-check=[no|generic|specific]     Insert stack checking code into the program
2056
2057 fstack-check
2058 Common Alias(fstack-check=, specific, no)
2059 Insert stack checking code into the program.  Same as -fstack-check=specific
2060
2061 fstack-limit
2062 Common Var(common_deferred_options) Defer
2063
2064 fstack-limit-register=
2065 Common RejectNegative Joined Var(common_deferred_options) Defer
2066 -fstack-limit-register=<register>       Trap if the stack goes past <register>
2067
2068 fstack-limit-symbol=
2069 Common RejectNegative Joined Var(common_deferred_options) Defer
2070 -fstack-limit-symbol=<name>     Trap if the stack goes past symbol <name>
2071
2072 fstack-protector
2073 Common Report Var(flag_stack_protect, 1)
2074 Use propolice as a stack protection method
2075
2076 fstack-protector-all
2077 Common Report RejectNegative Var(flag_stack_protect, 2)
2078 Use a stack protection method for every function
2079
2080 fstack-protector-strong
2081 Common Report RejectNegative Var(flag_stack_protect, 3)
2082 Use a smart stack protection method for certain functions
2083
2084 fstack-usage
2085 Common RejectNegative Var(flag_stack_usage)
2086 Output stack usage information on a per-function basis
2087
2088 fstrength-reduce
2089 Common Ignore
2090 Does nothing.  Preserved for backward compatibility.
2091
2092 ; Nonzero if we should do (language-dependent) alias analysis.
2093 ; Typically, this analysis will assume that expressions of certain
2094 ; types do not alias expressions of certain other types.  Only used
2095 ; if alias analysis (in general) is enabled.
2096 fstrict-aliasing
2097 Common Report Var(flag_strict_aliasing) Optimization
2098 Assume strict aliasing rules apply
2099
2100 fstrict-overflow
2101 Common Report Var(flag_strict_overflow)
2102 Treat signed overflow as undefined
2103
2104 fsync-libcalls
2105 Common Report Var(flag_sync_libcalls) Init(1)
2106 Implement __atomic operations via libcalls to legacy __sync functions
2107
2108 fsyntax-only
2109 Common Report Var(flag_syntax_only)
2110 Check for syntax errors, then stop
2111
2112 ftest-coverage
2113 Common Report Var(flag_test_coverage)
2114 Create data files needed by \"gcov\"
2115
2116 fthread-jumps
2117 Common Report Var(flag_thread_jumps) Optimization
2118 Perform jump threading optimizations
2119
2120 ftime-report
2121 Common Report Var(time_report)
2122 Report the time taken by each compiler pass
2123
2124 ftls-model=
2125 Common Joined RejectNegative Enum(tls_model) Var(flag_tls_default) Init(TLS_MODEL_GLOBAL_DYNAMIC)
2126 -ftls-model=[global-dynamic|local-dynamic|initial-exec|local-exec]      Set the default thread-local storage code generation model
2127
2128 Enum
2129 Name(tls_model) Type(enum tls_model) UnknownError(unknown TLS model %qs)
2130
2131 EnumValue
2132 Enum(tls_model) String(global-dynamic) Value(TLS_MODEL_GLOBAL_DYNAMIC)
2133
2134 EnumValue
2135 Enum(tls_model) String(local-dynamic) Value(TLS_MODEL_LOCAL_DYNAMIC)
2136
2137 EnumValue
2138 Enum(tls_model) String(initial-exec) Value(TLS_MODEL_INITIAL_EXEC)
2139
2140 EnumValue
2141 Enum(tls_model) String(local-exec) Value(TLS_MODEL_LOCAL_EXEC)
2142
2143 ftoplevel-reorder
2144 Common Report Var(flag_toplevel_reorder) Init(2) Optimization
2145 Reorder top level functions, variables, and asms
2146
2147 ftracer
2148 Common Report Var(flag_tracer)
2149 Perform superblock formation via tail duplication
2150
2151 ; Zero means that floating-point math operations cannot generate a
2152 ; (user-visible) trap.  This is the case, for example, in nonstop
2153 ; IEEE 754 arithmetic.
2154 ftrapping-math
2155 Common Report Var(flag_trapping_math) Init(1) Optimization SetByCombined
2156 Assume floating-point operations can trap
2157
2158 ftrapv
2159 Common Report Var(flag_trapv) Optimization
2160 Trap for signed overflow in addition, subtraction and multiplication
2161
2162 ftree-ccp
2163 Common Report Var(flag_tree_ccp) Optimization
2164 Enable SSA-CCP optimization on trees
2165
2166 ftree-bit-ccp
2167 Common Report Var(flag_tree_bit_ccp) Optimization
2168 Enable SSA-BIT-CCP optimization on trees
2169
2170 ftree-store-ccp
2171 Common Ignore
2172 Does nothing.  Preserved for backward compatibility.
2173
2174 ftree-ch
2175 Common Report Var(flag_tree_ch) Optimization
2176 Enable loop header copying on trees
2177
2178 ftree-coalesce-inlined-vars
2179 Common Report Var(flag_ssa_coalesce_vars,1) Init(2) RejectNegative Optimization
2180 Enable coalescing of copy-related user variables that are inlined
2181
2182 ftree-coalesce-vars
2183 Common Report Var(flag_ssa_coalesce_vars,2) Optimization
2184 Enable coalescing of all copy-related user variables
2185
2186 ftree-copyrename
2187 Common Report Var(flag_tree_copyrename) Optimization
2188 Replace SSA temporaries with better names in copies
2189
2190 ftree-copy-prop
2191 Common Report Var(flag_tree_copy_prop) Optimization
2192 Enable copy propagation on trees
2193
2194 ftree-store-copy-prop
2195 Common Ignore
2196 Does nothing.  Preserved for backward compatibility.
2197
2198 ftree-cselim
2199 Common Report Var(flag_tree_cselim) Init(2) Optimization
2200 Transform condition stores into unconditional ones
2201
2202 ftree-switch-conversion
2203 Common Report Var(flag_tree_switch_conversion) Optimization
2204 Perform conversions of switch initializations.
2205
2206 ftree-dce
2207 Common Report Var(flag_tree_dce) Optimization
2208 Enable SSA dead code elimination optimization on trees
2209
2210 ftree-dominator-opts
2211 Common Report Var(flag_tree_dom) Optimization
2212 Enable dominator optimizations
2213
2214 ftree-tail-merge
2215 Common Report Var(flag_tree_tail_merge) Optimization
2216 Enable tail merging on trees
2217
2218 ftree-dse
2219 Common Report Var(flag_tree_dse) Optimization
2220 Enable dead store elimination
2221
2222 ftree-forwprop
2223 Common Report Var(flag_tree_forwprop) Init(1) Optimization
2224 Enable forward propagation on trees
2225
2226 ftree-fre
2227 Common Report Var(flag_tree_fre) Optimization
2228 Enable Full Redundancy Elimination (FRE) on trees
2229
2230 foptimize-strlen
2231 Common Report Var(flag_optimize_strlen) Optimization
2232 Enable string length optimizations on trees
2233
2234 fisolate-erroneous-paths-dereference
2235 Common Report Var(flag_isolate_erroneous_paths_dereference) Optimization
2236 Detect paths which trigger erroneous or undefined behaviour due to
2237 dereferencing a NULL pointer.  Isolate those paths from the main control
2238 flow and turn the statement with erroneous or undefined behaviour into a trap.
2239
2240 fisolate-erroneous-paths-attribute
2241 Common Report Var(flag_isolate_erroneous_paths_attribute) Optimization
2242 Detect paths which trigger erroneous or undefined behaviour due a NULL value
2243 being used in a way which is forbidden by a returns_nonnull or nonnull
2244 attribute.  Isolate those paths from the main control flow and turn the
2245 statement with erroneous or undefined behaviour into a trap.
2246
2247 ftree-loop-distribution
2248 Common Report Var(flag_tree_loop_distribution) Optimization
2249 Enable loop distribution on trees
2250
2251 ftree-loop-distribute-patterns
2252 Common Report Var(flag_tree_loop_distribute_patterns) Optimization
2253 Enable loop distribution for patterns transformed into a library call
2254
2255 ftree-loop-im
2256 Common Report Var(flag_tree_loop_im) Init(1) Optimization
2257 Enable loop invariant motion on trees
2258
2259 ftree-loop-linear
2260 Common Alias(floop-interchange)
2261 Enable loop interchange transforms.  Same as -floop-interchange
2262
2263 ftree-loop-ivcanon
2264 Common Report Var(flag_tree_loop_ivcanon) Init(1) Optimization
2265 Create canonical induction variables in loops
2266
2267 ftree-loop-optimize
2268 Common Report Var(flag_tree_loop_optimize) Init(1) Optimization
2269 Enable loop optimizations on tree level
2270
2271 ftree-parallelize-loops=
2272 Common Report Joined RejectNegative UInteger Var(flag_tree_parallelize_loops) Init(1)
2273 Enable automatic parallelization of loops
2274
2275 ftree-phiprop
2276 Common Report Var(flag_tree_phiprop) Init(1) Optimization
2277 Enable hoisting loads from conditional pointers.
2278
2279 ftree-pre
2280 Common Report Var(flag_tree_pre) Optimization
2281 Enable SSA-PRE optimization on trees
2282
2283 ftree-partial-pre
2284 Common Report Var(flag_tree_partial_pre) Optimization
2285 In SSA-PRE optimization on trees, enable partial-partial redundancy elimination
2286
2287 ftree-pta
2288 Common Report Var(flag_tree_pta) Optimization
2289 Perform function-local points-to analysis on trees.
2290
2291 ftree-reassoc
2292 Common Report Var(flag_tree_reassoc) Init(1) Optimization
2293 Enable reassociation on tree level
2294
2295 ftree-salias
2296 Common Ignore
2297 Does nothing.  Preserved for backward compatibility.
2298
2299 ftree-sink
2300 Common Report Var(flag_tree_sink) Optimization
2301 Enable SSA code sinking on trees
2302
2303 ftree-slsr
2304 Common Report Var(flag_tree_slsr) Optimization
2305 Perform straight-line strength reduction
2306
2307 ftree-sra
2308 Common Report Var(flag_tree_sra) Optimization
2309 Perform scalar replacement of aggregates
2310
2311 ftree-ter
2312 Common Report Var(flag_tree_ter) Optimization
2313 Replace temporary expressions in the SSA->normal pass
2314
2315 ftree-lrs
2316 Common Report Var(flag_tree_live_range_split) Optimization
2317 Perform live range splitting during the SSA->normal pass
2318
2319 ftree-vrp
2320 Common Report Var(flag_tree_vrp) Init(0) Optimization
2321 Perform Value Range Propagation on trees
2322
2323 funit-at-a-time
2324 Common Report Var(flag_unit_at_a_time) Init(1) Optimization
2325 Compile whole compilation unit at a time
2326
2327 funroll-loops
2328 Common Report Var(flag_unroll_loops) Optimization
2329 Perform loop unrolling when iteration count is known
2330
2331 funroll-all-loops
2332 Common Report Var(flag_unroll_all_loops) Optimization
2333 Perform loop unrolling for all loops
2334
2335 ; Nonzero means that loop optimizer may assume that the induction variables
2336 ; that control loops do not overflow and that the loops with nontrivial
2337 ; exit condition are not infinite
2338 funsafe-loop-optimizations
2339 Common Report Var(flag_unsafe_loop_optimizations) Optimization
2340 Allow loop optimizations to assume that the loops behave in normal way
2341
2342 fassociative-math
2343 Common Report Var(flag_associative_math) SetByCombined
2344 Allow optimization for floating-point arithmetic which may change the
2345 result of the operation due to rounding.
2346
2347 freciprocal-math
2348 Common Report Var(flag_reciprocal_math) SetByCombined
2349 Same as -fassociative-math for expressions which include division.
2350
2351 ; Nonzero means that unsafe floating-point math optimizations are allowed
2352 ; for the sake of speed.  IEEE compliance is not guaranteed, and operations
2353 ; are allowed to assume that their arguments and results are "normal"
2354 ; (e.g., nonnegative for SQRT).
2355 funsafe-math-optimizations
2356 Common Report Var(flag_unsafe_math_optimizations) Optimization SetByCombined
2357 Allow math optimizations that may violate IEEE or ISO standards
2358
2359 funswitch-loops
2360 Common Report Var(flag_unswitch_loops) Optimization
2361 Perform loop unswitching
2362
2363 funwind-tables
2364 Common Report Var(flag_unwind_tables) Optimization
2365 Just generate unwind tables for exception handling
2366
2367 fuse-ld=bfd
2368 Common Driver Negative(fuse-ld=gold)
2369 Use the bfd linker instead of the default linker
2370
2371 fuse-ld=gold
2372 Common Driver Negative(fuse-ld=bfd)
2373 Use the gold linker instead of the default linker
2374
2375 fuse-linker-plugin
2376 Common Undocumented Var(flag_use_linker_plugin)
2377
2378 ; Positive if we should track variables, negative if we should run
2379 ; the var-tracking pass only to discard debug annotations, zero if
2380 ; we're not to run it.  When flag_var_tracking == 2 (AUTODETECT_VALUE) it
2381 ; will be set according to optimize, debug_info_level and debug_hooks
2382 ; in process_options ().
2383 fvar-tracking
2384 Common Report Var(flag_var_tracking) Init(2) Optimization
2385 Perform variable tracking
2386
2387 ; Positive if we should track variables at assignments, negative if
2388 ; we should run the var-tracking pass only to discard debug
2389 ; annotations.  When flag_var_tracking_assignments ==
2390 ; AUTODETECT_VALUE it will be set according to flag_var_tracking.
2391 fvar-tracking-assignments
2392 Common Report Var(flag_var_tracking_assignments) Init(2) Optimization
2393 Perform variable tracking by annotating assignments
2394
2395 ; Nonzero if we should toggle flag_var_tracking_assignments after
2396 ; processing options and computing its default.  */
2397 fvar-tracking-assignments-toggle
2398 Common Report Var(flag_var_tracking_assignments_toggle) Optimization
2399 Toggle -fvar-tracking-assignments
2400
2401 ; Positive if we should track uninitialized variables, negative if
2402 ; we should run the var-tracking pass only to discard debug
2403 ; annotations.  When flag_var_tracking_uninit == AUTODETECT_VALUE it
2404 ; will be set according to flag_var_tracking.
2405 fvar-tracking-uninit
2406 Common Report Var(flag_var_tracking_uninit) Optimization
2407 Perform variable tracking and also tag variables that are uninitialized
2408
2409 ftree-vectorize
2410 Common Report Var(flag_tree_vectorize) Optimization
2411 Enable vectorization on trees
2412
2413 ftree-vectorizer-verbose=
2414 Common Joined RejectNegative Ignore
2415 Does nothing.  Preserved for backward compatibility.
2416
2417 ftree-loop-vectorize
2418 Common Report Var(flag_tree_loop_vectorize) Optimization
2419 Enable loop vectorization on trees
2420
2421 ftree-slp-vectorize
2422 Common Report Var(flag_tree_slp_vectorize) Optimization
2423 Enable basic block vectorization (SLP) on trees
2424
2425 fvect-cost-model=
2426 Common Joined RejectNegative Enum(vect_cost_model) Var(flag_vect_cost_model) Init(VECT_COST_MODEL_DEFAULT)
2427 Specifies the cost model for vectorization
2428
2429 fsimd-cost-model=
2430 Common Joined RejectNegative Enum(vect_cost_model) Var(flag_simd_cost_model) Init(VECT_COST_MODEL_UNLIMITED)
2431 Specifies the vectorization cost model for code marked with a simd directive
2432
2433 Enum
2434 Name(vect_cost_model) Type(enum vect_cost_model) UnknownError(unknown vectorizer cost model %qs)
2435
2436 EnumValue
2437 Enum(vect_cost_model) String(unlimited) Value(VECT_COST_MODEL_UNLIMITED)
2438
2439 EnumValue
2440 Enum(vect_cost_model) String(dynamic) Value(VECT_COST_MODEL_DYNAMIC)
2441
2442 EnumValue
2443 Enum(vect_cost_model) String(cheap) Value(VECT_COST_MODEL_CHEAP)
2444
2445 fvect-cost-model
2446 Common RejectNegative Alias(fvect-cost-model=,dynamic)
2447 Enables the dynamic vectorizer cost model.  Preserved for backward compatibility.
2448
2449 fno-vect-cost-model
2450 Common RejectNegative Alias(fvect-cost-model=,unlimited)
2451 Enables the unlimited vectorizer cost model.  Preserved for backward compatibility.
2452
2453 ftree-vect-loop-version
2454 Common Ignore
2455 Does nothing. Preserved for backward compatibility.
2456
2457 ftree-scev-cprop
2458 Common Report Var(flag_tree_scev_cprop) Init(1) Optimization
2459 Enable copy propagation of scalar-evolution information.
2460
2461 ; -fverbose-asm causes extra commentary information to be produced in
2462 ; the generated assembly code (to make it more readable).  This option
2463 ; is generally only of use to those who actually need to read the
2464 ; generated assembly code (perhaps while debugging the compiler itself).
2465 ; -fno-verbose-asm, the default, causes the extra information
2466 ; to not be added and is useful when comparing two assembler files.
2467 fverbose-asm
2468 Common Report Var(flag_verbose_asm)
2469 Add extra commentary to assembler output
2470
2471 fvisibility=
2472 Common Joined RejectNegative Enum(symbol_visibility) Var(default_visibility) Init(VISIBILITY_DEFAULT)
2473 -fvisibility=[default|internal|hidden|protected]        Set the default symbol visibility
2474
2475 Enum
2476 Name(symbol_visibility) Type(enum symbol_visibility) UnknownError(unrecognized visibility value %qs)
2477
2478 EnumValue
2479 Enum(symbol_visibility) String(default) Value(VISIBILITY_DEFAULT)
2480
2481 EnumValue
2482 Enum(symbol_visibility) String(internal) Value(VISIBILITY_INTERNAL)
2483
2484 EnumValue
2485 Enum(symbol_visibility) String(hidden) Value(VISIBILITY_HIDDEN)
2486
2487 EnumValue
2488 Enum(symbol_visibility) String(protected) Value(VISIBILITY_PROTECTED)
2489
2490 fvtable-verify=
2491 Common Joined RejectNegative Enum(vtv_priority) Var(flag_vtable_verify) Init(VTV_NO_PRIORITY)
2492 Validate vtable pointers before using them.
2493
2494 Enum
2495 Name(vtv_priority) Type(enum vtv_priority) UnknownError(unknown vtable verify initialization priority %qs)
2496
2497 EnumValue
2498 Enum(vtv_priority) String(none) Value(VTV_NO_PRIORITY)
2499
2500 EnumValue
2501 Enum(vtv_priority) String(std) Value(VTV_STANDARD_PRIORITY)
2502
2503 EnumValue
2504 Enum(vtv_priority) String(preinit) Value(VTV_PREINIT_PRIORITY)
2505
2506 fvtv-counts
2507 Common Var(flag_vtv_counts)
2508 Output vtable verification counters.
2509
2510 fvtv-debug
2511 Common Var(flag_vtv_debug)
2512 Output vtable verification pointer sets information.
2513
2514 fvpt
2515 Common Report Var(flag_value_profile_transformations) Optimization
2516 Use expression value profiles in optimizations
2517
2518 fweb
2519 Common Report Var(flag_web) Init(2) Optimization
2520 Construct webs and split unrelated uses of single variable
2521
2522 ftree-builtin-call-dce
2523 Common Report Var(flag_tree_builtin_call_dce) Init(0) Optimization
2524 Enable conditional dead code elimination for builtin calls
2525
2526 fwhole-program
2527 Common Report Var(flag_whole_program) Init(0) Optimization
2528 Perform whole program optimizations
2529
2530 fwrapv
2531 Common Report Var(flag_wrapv) Optimization
2532 Assume signed arithmetic overflow wraps around
2533
2534 fzero-initialized-in-bss
2535 Common Report Var(flag_zero_initialized_in_bss) Init(1)
2536 Put zero initialized data in the bss section
2537
2538 g
2539 Common JoinedOrMissing
2540 Generate debug information in default format
2541
2542 gcoff
2543 Common JoinedOrMissing Negative(gdwarf)
2544 Generate debug information in COFF format
2545
2546 gdwarf
2547 Common JoinedOrMissing Negative(gdwarf-)
2548 Generate debug information in default version of DWARF format
2549
2550 gdwarf-
2551 Common Joined UInteger Var(dwarf_version) Init(4) Negative(gstabs)
2552 Generate debug information in DWARF v2 (or later) format
2553
2554 ggdb
2555 Common JoinedOrMissing
2556 Generate debug information in default extended format
2557
2558 gno-pubnames
2559 Common Negative(gpubnames) Var(debug_generate_pub_sections, 0) Init(-1)
2560 Don't generate DWARF pubnames and pubtypes sections.
2561
2562 gpubnames
2563 Common Negative(ggnu-pubnames) Var(debug_generate_pub_sections, 1)
2564 Generate DWARF pubnames and pubtypes sections.
2565
2566 ggnu-pubnames
2567 Common Negative(gno-pubnames) Var(debug_generate_pub_sections, 2)
2568 Generate DWARF pubnames and pubtypes sections with GNU extensions.
2569
2570 gno-record-gcc-switches
2571 Common RejectNegative Var(dwarf_record_gcc_switches,0) Init(1)
2572 Don't record gcc command line switches in DWARF DW_AT_producer.
2573
2574 grecord-gcc-switches
2575 Common RejectNegative Var(dwarf_record_gcc_switches,1)
2576 Record gcc command line switches in DWARF DW_AT_producer.
2577
2578 gno-split-dwarf
2579 Common Driver RejectNegative Var(dwarf_split_debug_info,0) Init(0)
2580 Don't generate debug information in separate .dwo files
2581
2582 gsplit-dwarf
2583 Common Driver RejectNegative Var(dwarf_split_debug_info,1)
2584 Generate debug information in separate .dwo files
2585
2586 gstabs
2587 Common JoinedOrMissing Negative(gstabs+)
2588 Generate debug information in STABS format
2589
2590 gstabs+
2591 Common JoinedOrMissing Negative(gvms)
2592 Generate debug information in extended STABS format
2593
2594 gno-strict-dwarf
2595 Common RejectNegative Var(dwarf_strict,0) Init(0)
2596 Emit DWARF additions beyond selected version
2597
2598 gstrict-dwarf
2599 Common Report RejectNegative Var(dwarf_strict,1)
2600 Don't emit DWARF additions beyond selected version
2601
2602 gtoggle
2603 Common Report Var(flag_gtoggle)
2604 Toggle debug information generation
2605
2606 gvms
2607 Common JoinedOrMissing Negative(gxcoff)
2608 Generate debug information in VMS format
2609
2610 gxcoff
2611 Common JoinedOrMissing Negative(gxcoff+)
2612 Generate debug information in XCOFF format
2613
2614 gxcoff+
2615 Common JoinedOrMissing Negative(gcoff)
2616 Generate debug information in extended XCOFF format
2617
2618 Enum
2619 Name(compressed_debug_sections) Type(int)
2620
2621 ; Since -gz= is completely handled in specs, the values aren't used and we
2622 ; assign arbitrary constants.
2623 EnumValue
2624 Enum(compressed_debug_sections) String(none) Value(0)
2625
2626 EnumValue
2627 Enum(compressed_debug_sections) String(zlib) Value(1)
2628
2629 EnumValue
2630 Enum(compressed_debug_sections) String(zlib-gnu) Value(2)
2631
2632 gz
2633 Common Driver
2634 Generate compressed debug sections
2635
2636 gz=
2637 Common Driver Joined Enum(compressed_debug_sections)
2638 -gz=<format>    Generate compressed debug sections in format <format>
2639
2640 h
2641 Driver Joined Separate
2642
2643 iplugindir=
2644 Common Joined Var(plugindir_string) Init(0)
2645 -iplugindir=<dir>       Set <dir> to be the default plugin directory
2646
2647 imultiarch
2648 Common Joined Separate RejectDriver Var(imultiarch) Init(0)
2649 -imultiarch <dir>       Set <dir> to be the multiarch include subdirectory
2650
2651 l
2652 Driver Joined Separate
2653
2654 n
2655 Driver
2656
2657 no-canonical-prefixes
2658 Driver
2659
2660 nodefaultlibs
2661 Driver
2662
2663 nostartfiles
2664 Driver
2665
2666 nostdlib
2667 Driver
2668
2669 o
2670 Common Driver Joined Separate Var(asm_file_name) MissingArgError(missing filename after %qs)
2671 -o <file>       Place output into <file>
2672
2673 p
2674 Common Var(profile_flag)
2675 Enable function profiling
2676
2677 pass-exit-codes
2678 Driver Var(pass_exit_codes)
2679
2680 pedantic
2681 Common Alias(Wpedantic)
2682
2683 pedantic-errors
2684 Common Var(flag_pedantic_errors)
2685 Like -pedantic but issue them as errors
2686
2687 pg
2688 Driver
2689
2690 pipe
2691 Driver Var(use_pipes)
2692
2693 print-file-name=
2694 Driver JoinedOrMissing Var(print_file_name)
2695
2696 print-libgcc-file-name
2697 Driver
2698
2699 print-multi-directory
2700 Driver Var(print_multi_directory)
2701
2702 print-multi-lib
2703 Driver Var(print_multi_lib)
2704
2705 print-multi-os-directory
2706 Driver Var(print_multi_os_directory)
2707
2708 print-multiarch
2709 Driver Var(print_multiarch)
2710
2711 print-prog-name=
2712 Driver JoinedOrMissing Var(print_prog_name)
2713
2714 print-search-dirs
2715 Driver Var(print_search_dirs)
2716
2717 print-sysroot
2718 Driver Var(print_sysroot)
2719
2720 print-sysroot-headers-suffix
2721 Driver Var(print_sysroot_headers_suffix)
2722
2723 quiet
2724 Common Var(quiet_flag) RejectDriver
2725 Do not display functions compiled or elapsed time
2726
2727 r
2728 Driver
2729
2730 s
2731 Driver
2732
2733 save-temps
2734 Driver
2735
2736 save-temps=
2737 Driver Joined
2738
2739 t
2740 Driver
2741
2742 time
2743 Driver Var(report_times)
2744
2745 time=
2746 Driver JoinedOrMissing
2747
2748 u
2749 Driver Joined Separate
2750
2751 undef
2752 Driver
2753 ; C option, but driver must not handle as "-u ndef".
2754
2755 v
2756 Common Driver Var(verbose_flag)
2757 Enable verbose output
2758
2759 version
2760 Common Var(version_flag) RejectDriver
2761 Display the compiler's version
2762
2763 w
2764 Common Var(inhibit_warnings)
2765 Suppress warnings
2766
2767 wrapper
2768 Driver Separate Var(wrapper_string)
2769
2770 x
2771 Driver Joined Separate
2772
2773 shared
2774 Driver RejectNegative Negative(pie)
2775 Create a shared library
2776
2777 shared-libgcc
2778 Driver
2779
2780 specs
2781 Driver Separate Alias(specs=)
2782
2783 specs=
2784 Driver Joined
2785
2786 static
2787 Driver
2788
2789 static-libgcc
2790 Driver
2791
2792 static-libgfortran
2793 Driver
2794 ; Documented for Fortran, but always accepted by driver.
2795
2796 static-libstdc++
2797 Driver
2798
2799 static-libgo
2800 Driver
2801 ; Documented for Go, but always accepted by driver.
2802
2803 static-libasan
2804 Driver
2805
2806 static-libtsan
2807 Driver
2808
2809 static-liblsan
2810 Driver
2811
2812 static-libubsan
2813 Driver
2814
2815 symbolic
2816 Driver
2817
2818 pie
2819 Driver RejectNegative Negative(shared)
2820 Create a position independent executable
2821
2822 z
2823 Driver Joined Separate
2824
2825 fuse-caller-save
2826 Common Report Var(flag_use_caller_save) Optimization
2827 Use caller save register across calls if possible
2828
2829 ; This comment is to ensure we retain the blank line above.