gcc/common.opt

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