gcc/c-family/c.opt

   1 ; Options for the C, ObjC, C++ and ObjC++ front ends.
   2 ; Copyright (C) 2003-2015 Free Software Foundation, Inc.
   3 ;
   4 ; This file is part of GCC.
   5 ;
   6 ; GCC is free software; you can redistribute it and/or modify it under
   7 ; the terms of the GNU General Public License as published by the Free
   8 ; Software Foundation; either version 3, or (at your option) any later
   9 ; version.
  10 ;
  11 ; GCC is distributed in the hope that it will be useful, but WITHOUT ANY
  12 ; WARRANTY; without even the implied warranty of MERCHANTABILITY or
  13 ; FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  14 ; for more details.
  15 ;
  16 ; You should have received a copy of the GNU General Public License
  17 ; along with GCC; see the file COPYING3.  If not see
  18 ; <http://www.gnu.org/licenses/>.
  19
  20 ; See the GCC internals manual for a description of this file's format.
  21
  22 ; Please try to keep this file in ASCII collating order.
  23
  24 Language
  25 C
  26
  27 Language
  28 ObjC
  29
  30 Language
  31 C++
  32
  33 Language
  34 ObjC++
  35
  36 -all-warnings
  37 C ObjC C++ ObjC++ Warning Alias(Wall)
  38
  39 -ansi
  40 C ObjC C++ ObjC++ Alias(ansi)
  41
  42 -assert
  43 C ObjC C++ ObjC++ Separate Alias(A) MissingArgError(assertion missing after %qs)
  44
  45 -assert=
  46 C ObjC C++ ObjC++ Joined Alias(A) MissingArgError(assertion missing after %qs)
  47
  48 -comments
  49 C ObjC C++ ObjC++ Alias(C)
  50
  51 -comments-in-macros
  52 C ObjC C++ ObjC++ Alias(CC)
  53
  54 -define-macro
  55 C ObjC C++ ObjC++ Separate Alias(D) MissingArgError(macro name missing after %qs)
  56
  57 -define-macro=
  58 C ObjC C++ ObjC++ Joined Alias(D) MissingArgError(macro name missing after %qs)
  59
  60 -dependencies
  61 C ObjC C++ ObjC++ Alias(M)
  62
  63 -dump
  64 C ObjC C++ ObjC++ Separate Alias(d)
  65
  66 -dump=
  67 C ObjC C++ ObjC++ Joined Alias(d)
  68
  69 -imacros
  70 C ObjC C++ ObjC++ Separate Alias(imacros) MissingArgError(missing filename after %qs)
  71
  72 -imacros=
  73 C ObjC C++ ObjC++ Joined Alias(imacros) MissingArgError(missing filename after %qs)
  74
  75 -include
  76 C ObjC C++ ObjC++ Separate Alias(include) MissingArgError(missing filename after %qs)
  77
  78 -include=
  79 C ObjC C++ ObjC++ Joined Alias(include) MissingArgError(missing filename after %qs)
  80
  81 -include-barrier
  82 C ObjC C++ ObjC++ Alias(I, -)
  83
  84 -include-directory
  85 C ObjC C++ ObjC++ Separate Alias(I) MissingArgError(missing path after %qs)
  86
  87 -include-directory=
  88 C ObjC C++ ObjC++ Joined Alias(I) MissingArgError(missing path after %qs)
  89
  90 -include-directory-after
  91 C ObjC C++ ObjC++ Separate Alias(idirafter) MissingArgError(missing path after %qs)
  92
  93 -include-directory-after=
  94 C ObjC C++ ObjC++ Joined Alias(idirafter) MissingArgError(missing path after %qs)
  95
  96 -include-prefix
  97 C ObjC C++ ObjC++ Separate Alias(iprefix)
  98
  99 -include-prefix=
 100 C ObjC C++ ObjC++ JoinedOrMissing Alias(iprefix)
 101
 102 -include-with-prefix
 103 C ObjC C++ ObjC++ Separate Alias(iwithprefix)
 104
 105 -include-with-prefix=
 106 C ObjC C++ ObjC++ JoinedOrMissing Alias(iwithprefix)
 107
 108 -include-with-prefix-after
 109 C ObjC C++ ObjC++ Separate Alias(iwithprefix)
 110
 111 -include-with-prefix-after=
 112 C ObjC C++ ObjC++ JoinedOrMissing Alias(iwithprefix)
 113
 114 -include-with-prefix-before
 115 C ObjC C++ ObjC++ Separate Alias(iwithprefixbefore)
 116
 117 -include-with-prefix-before=
 118 C ObjC C++ ObjC++ JoinedOrMissing Alias(iwithprefixbefore)
 119
 120 -no-integrated-cpp
 121 Driver Alias(no-integrated-cpp)
 122
 123 -no-line-commands
 124 C ObjC C++ ObjC++ Alias(P)
 125
 126 -no-standard-includes
 127 C ObjC C++ ObjC++ Alias(nostdinc)
 128
 129 -no-warnings
 130 C ObjC C++ ObjC++ Alias(w)
 131
 132 -output
 133 C ObjC C++ ObjC++ Separate Alias(o)
 134
 135 -output=
 136 C ObjC C++ ObjC++ Joined Alias(o)
 137
 138 -output-pch=
 139 C ObjC C++ ObjC++ Joined Separate
 140
 141 -pedantic
 142 C ObjC C++ ObjC++ Alias(pedantic)
 143
 144 -preprocess
 145 C ObjC C++ ObjC++ Undocumented Alias(E)
 146
 147 -print-missing-file-dependencies
 148 C ObjC C++ ObjC++ Alias(MG)
 149
 150 -trace-includes
 151 C ObjC C++ ObjC++ Alias(H)
 152
 153 -traditional
 154 Driver Alias(traditional)
 155
 156 -traditional-cpp
 157 C ObjC C++ ObjC++ Alias(traditional-cpp)
 158
 159 -trigraphs
 160 C ObjC C++ ObjC++ Alias(trigraphs)
 161
 162 -undefine-macro
 163 C ObjC C++ ObjC++ Separate Alias(U) MissingArgError(macro name missing after %qs)
 164
 165 -undefine-macro=
 166 C ObjC C++ ObjC++ Joined Alias(U) MissingArgError(macro name missing after %qs)
 167
 168 -user-dependencies
 169 C ObjC C++ ObjC++ Alias(MM)
 170
 171 -verbose
 172 Common C ObjC C++ ObjC++ Alias(v)
 173
 174 -write-dependencies
 175 C ObjC C++ ObjC++ NoDriverArg Separate Alias(MD) MissingArgError(missing filename after %qs)
 176
 177 -write-user-dependencies
 178 C ObjC C++ ObjC++ NoDriverArg Separate Alias(MMD) MissingArgError(missing filename after %qs)
 179
 180 A
 181 C ObjC C++ ObjC++ Joined Separate MissingArgError(assertion missing after %qs)
 182 -A<question>=<answer>   Assert the <answer> to <question>.  Putting '-' before <question> disables the <answer> to <question>
 183
 184 C
 185 C ObjC C++ ObjC++
 186 Do not discard comments
 187
 188 CC
 189 C ObjC C++ ObjC++
 190 Do not discard comments in macro expansions
 191
 192 D
 193 C ObjC C++ ObjC++ Joined Separate MissingArgError(macro name missing after %qs)
 194 -D<macro>[=<val>]       Define a <macro> with <val> as its value.  If just <macro> is given, <val> is taken to be 1
 195
 196 E
 197 C ObjC C++ ObjC++ Undocumented Var(flag_preprocess_only)
 198
 199 F
 200 Driver C ObjC C++ ObjC++ Joined Separate MissingArgError(missing path after %qs)
 201 -F <dir>        Add <dir> to the end of the main framework include path
 202
 203 H
 204 C ObjC C++ ObjC++
 205 Print the name of header files as they are used
 206
 207 I
 208 C ObjC C++ ObjC++ Joined Separate MissingArgError(missing path after %qs)
 209 -I <dir>        Add <dir> to the end of the main include path
 210
 211 M
 212 C ObjC C++ ObjC++
 213 Generate make dependencies
 214
 215 MD
 216 C ObjC C++ ObjC++ NoDriverArg Separate MissingArgError(missing filename after %qs)
 217 Generate make dependencies and compile
 218
 219 MF
 220 C ObjC C++ ObjC++ Joined Separate MissingArgError(missing filename after %qs)
 221 -MF <file>      Write dependency output to the given file
 222
 223 MG
 224 C ObjC C++ ObjC++
 225 Treat missing header files as generated files
 226
 227 MM
 228 C ObjC C++ ObjC++
 229 Like -M but ignore system header files
 230
 231 MMD
 232 C ObjC C++ ObjC++ NoDriverArg Separate MissingArgError(missing filename after %qs)
 233 Like -MD but ignore system header files
 234
 235 MP
 236 C ObjC C++ ObjC++
 237 Generate phony targets for all headers
 238
 239 MQ
 240 C ObjC C++ ObjC++ Joined Separate MissingArgError(missing makefile target after %qs)
 241 -MQ <target>    Add a MAKE-quoted target
 242
 243 MT
 244 C ObjC C++ ObjC++ Joined Separate MissingArgError(missing makefile target after %qs)
 245 -MT <target>    Add an unquoted target
 246
 247 P
 248 C ObjC C++ ObjC++
 249 Do not generate #line directives
 250
 251 U
 252 C ObjC C++ ObjC++ Joined Separate MissingArgError(macro name missing after %qs)
 253 -U<macro>       Undefine <macro>
 254
 255 Wabi
 256 C ObjC C++ ObjC++ LTO Var(warn_abi) Warning
 257 Warn about things that will change when compiling with an ABI-compliant compiler
 258
 259 Wabi=
 260 C ObjC C++ ObjC++ LTO Joined RejectNegative UInteger Warning
 261 Warn about things that change between the current -fabi-version and the specified version
 262
 263 Wabi-tag
 264 C++ ObjC++ Var(warn_abi_tag) Warning
 265 Warn if a subobject has an abi_tag attribute that the complete object type does not have
 266
 267 Wpsabi
 268 C ObjC C++ ObjC++ LTO Var(warn_psabi) Init(1) Undocumented LangEnabledBy(C ObjC C++ ObjC++,Wabi)
 269
 270 Waddress
 271 C ObjC C++ ObjC++ Var(warn_address) Warning LangEnabledBy(C ObjC C++ ObjC++,Wall)
 272 Warn about suspicious uses of memory addresses
 273
 274 Wall
 275 C ObjC C++ ObjC++ Warning
 276 Enable most warning messages
 277
 278 Warray-bounds
 279 LangEnabledBy(C ObjC C++ ObjC++,Wall)
 280 ; in common.opt
 281
 282 Warray-bounds=
 283 LangEnabledBy(C ObjC C++ ObjC++,Wall,1,0)
 284 ; in common.opt
 285
 286 Wassign-intercept
 287 ObjC ObjC++ Var(warn_assign_intercept) Warning
 288 Warn whenever an Objective-C assignment is being intercepted by the garbage collector
 289
 290 Wbad-function-cast
 291 C ObjC Var(warn_bad_function_cast) Warning
 292 Warn about casting functions to incompatible types
 293
 294 Wbool-compare
 295 C ObjC C++ ObjC++ Var(warn_bool_compare) Warning LangEnabledBy(C ObjC C++ ObjC++,Wall)
 296 Warn about boolean expression compared with an integer value different from true/false
 297
 298 Wframe-address
 299 C ObjC C++ ObjC++ Var(warn_frame_address) Warning LangEnabledBy(C ObjC C++ ObjC++,Wall)
 300 Warn when __builtin_frame_address or __builtin_return_address is used unsafely
 301
 302 Wbuiltin-macro-redefined
 303 C ObjC C++ ObjC++ CPP(warn_builtin_macro_redefined) CppReason(CPP_W_BUILTIN_MACRO_REDEFINED) Var(cpp_warn_builtin_macro_redefined) Init(1) Warning
 304 Warn when a built-in preprocessor macro is undefined or redefined
 305
 306 Wc90-c99-compat
 307 C ObjC CPP(cpp_warn_c90_c99_compat) CppReason(CPP_W_C90_C99_COMPAT) Var(warn_c90_c99_compat) Init(-1) Warning
 308 Warn about features not present in ISO C90, but present in ISO C99
 309
 310 Wc99-c11-compat
 311 C ObjC Var(warn_c99_c11_compat) Init(-1) Warning
 312 Warn about features not present in ISO C99, but present in ISO C11
 313
 314 Wc++-compat
 315 C ObjC Var(warn_cxx_compat) CPP(warn_cxx_operator_names) CppReason(CPP_W_CXX_OPERATOR_NAMES) Init(0) Warning
 316 Warn about C constructs that are not in the common subset of C and C++
 317
 318 Wc++0x-compat
 319 C++ ObjC++ Warning Alias(Wc++11-compat) Undocumented
 320
 321 Wc++11-compat
 322 C++ ObjC++ Var(warn_cxx11_compat) Warning LangEnabledBy(C++ ObjC++,Wall) Init(0) CPP(cpp_warn_cxx11_compat) CppReason(CPP_W_CXX11_COMPAT)
 323 Warn about C++ constructs whose meaning differs between ISO C++ 1998 and ISO C++ 2011
 324
 325 Wc++14-compat
 326 C++ ObjC++ Var(warn_cxx14_compat) Warning LangEnabledBy(C++ ObjC++,Wall)
 327 Warn about C++ constructs whose meaning differs between ISO C++ 2011 and ISO C++ 2014
 328
 329 Wcast-qual
 330 C ObjC C++ ObjC++ Var(warn_cast_qual) Warning
 331 Warn about casts which discard qualifiers
 332
 333 Wchar-subscripts
 334 C ObjC C++ ObjC++ Var(warn_char_subscripts) Warning LangEnabledBy(C ObjC C++ ObjC++,Wall)
 335 Warn about subscripts whose type is \"char\"
 336
 337 Wchkp
 338 C ObjC C++ ObjC++ Var(warn_chkp) Warning LangEnabledBy(C ObjC C++ ObjC++,Wall)
 339 Warn about memory access errors found by Pointer Bounds Checker
 340
 341 Wclobbered
 342 C ObjC C++ ObjC++ Var(warn_clobbered) Warning EnabledBy(Wextra)
 343 Warn about variables that might be changed by \"longjmp\" or \"vfork\"
 344
 345 Wcomment
 346 C ObjC C++ ObjC++ CPP(warn_comments) CppReason(CPP_W_COMMENTS) Var(cpp_warn_comment) Init(0) Warning LangEnabledBy(C ObjC C++ ObjC++,Wall)
 347 Warn about possibly nested block comments, and C++ comments spanning more than one physical line
 348
 349 Wcomments
 350 C ObjC C++ ObjC++ Warning Alias(Wcomment)
 351 Synonym for -Wcomment
 352
 353 Wconditionally-supported
 354 C++ ObjC++ Var(warn_conditionally_supported) Warning
 355 Warn for conditionally-supported constructs
 356
 357 Wconversion
 358 C ObjC C++ ObjC++ Var(warn_conversion) Warning
 359 Warn for implicit type conversions that may change a value
 360
 361 Wconversion-null
 362 C++ ObjC++ Var(warn_conversion_null) Init(1) Warning
 363 Warn for converting NULL from/to a non-pointer type
 364
 365 Wcpp
 366 C ObjC C++ ObjC++ CppReason(CPP_W_WARNING_DIRECTIVE)
 367 ; Documented in common.opt
 368
 369 Wctor-dtor-privacy
 370 C++ ObjC++ Var(warn_ctor_dtor_privacy) Warning
 371 Warn when all constructors and destructors are private
 372
 373 Wdate-time
 374 C ObjC C++ ObjC++ CPP(warn_date_time) CppReason(CPP_W_DATE_TIME) Var(cpp_warn_date_time) Init(0) Warning
 375 Warn about __TIME__, __DATE__ and __TIMESTAMP__ usage
 376
 377 Wdeclaration-after-statement
 378 C ObjC Var(warn_declaration_after_statement) Init(-1) Warning
 379 Warn when a declaration is found after a statement
 380
 381 Wdelete-incomplete
 382 C++ ObjC++ Var(warn_delete_incomplete) Init(1) Warning
 383 Warn when deleting a pointer to incomplete type
 384
 385 Wdelete-non-virtual-dtor
 386 C++ ObjC++ Var(warn_delnonvdtor) Warning LangEnabledBy(C++ ObjC++,Wall || Weffc++)
 387 Warn about deleting polymorphic objects with non-virtual destructors
 388
 389 Wdeprecated
 390 C C++ ObjC ObjC++ CPP(cpp_warn_deprecated) CppReason(CPP_W_DEPRECATED) Var(warn_deprecated) Init(1) Warning
 391 Warn if a deprecated compiler feature, class, method, or field is used
 392
 393 Wdesignated-init
 394 C ObjC Var(warn_designated_init) Init(1) Warning
 395 Warn about positional initialization of structs requiring designated initializers
 396
 397 Wdiscarded-array-qualifiers
 398 C ObjC Var(warn_discarded_array_qualifiers) Init(1) Warning
 399 Warn if qualifiers on arrays which are pointer targets are discarded
 400
 401 Wdiscarded-qualifiers
 402 C ObjC Var(warn_discarded_qualifiers) Init(1) Warning
 403 Warn if type qualifiers on pointers are discarded
 404
 405 Wdiv-by-zero
 406 C ObjC C++ ObjC++ Var(warn_div_by_zero) Init(1) Warning
 407 Warn about compile-time integer division by zero
 408
 409 Weffc++
 410 C++ ObjC++ Var(warn_ecpp) Warning
 411 Warn about violations of Effective C++ style rules
 412
 413 Wempty-body
 414 C ObjC C++ ObjC++ Var(warn_empty_body) Warning EnabledBy(Wextra)
 415 Warn about an empty body in an if or else statement
 416
 417 Wendif-labels
 418 C ObjC C++ ObjC++ CPP(warn_endif_labels) CppReason(CPP_W_ENDIF_LABELS) Var(cpp_warn_endif_labels) Init(1) Warning LangEnabledBy(C ObjC C++ ObjC++,Wpedantic)
 419 Warn about stray tokens after #elif and #endif
 420
 421 Wenum-compare
 422 C ObjC C++ ObjC++ Var(warn_enum_compare) Init(-1) Warning LangEnabledBy(C ObjC,Wall || Wc++-compat)
 423 Warn about comparison of different enum types
 424
 425 Werror
 426 C ObjC C++ ObjC++
 427 ; Documented in common.opt
 428
 429 Werror-implicit-function-declaration
 430 C ObjC RejectNegative Warning Alias(Werror=, implicit-function-declaration)
 431 This switch is deprecated; use -Werror=implicit-function-declaration instead
 432
 433 Wfloat-conversion
 434 C ObjC C++ ObjC++ Var(warn_float_conversion) LangEnabledBy(C ObjC C++ ObjC++,Wconversion)
 435 Warn for implicit type conversions that cause loss of floating point precision
 436
 437 Wfloat-equal
 438 C ObjC C++ ObjC++ Var(warn_float_equal) Warning
 439 Warn if testing floating point numbers for equality
 440
 441 Wformat
 442 C ObjC C++ ObjC++ Warning Alias(Wformat=, 1, 0)
 443 Warn about printf/scanf/strftime/strfmon format string anomalies
 444
 445 Wformat-contains-nul
 446 C ObjC C++ ObjC++ Var(warn_format_contains_nul) Warning LangEnabledBy(C ObjC C++ ObjC++,Wformat=, warn_format >= 1, 0)
 447 Warn about format strings that contain NUL bytes
 448
 449 Wformat-extra-args
 450 C ObjC C++ ObjC++ Var(warn_format_extra_args) Warning LangEnabledBy(C ObjC C++ ObjC++,Wformat=, warn_format >= 1, 0)
 451 Warn if passing too many arguments to a function for its format string
 452
 453 Wformat-nonliteral
 454 C ObjC C++ ObjC++ Var(warn_format_nonliteral) Warning LangEnabledBy(C ObjC C++ ObjC++,Wformat=, warn_format >= 2, 0)
 455 Warn about format strings that are not literals
 456
 457 Wformat-security
 458 C ObjC C++ ObjC++ Var(warn_format_security) Warning LangEnabledBy(C ObjC C++ ObjC++,Wformat=, warn_format >= 2, 0)
 459 Warn about possible security problems with format functions
 460
 461 Wformat-signedness
 462 C ObjC C++ ObjC++ Var(warn_format_signedness) Warning
 463 Warn about sign differences with format functions
 464
 465 Wformat-y2k
 466 C ObjC C++ ObjC++ Var(warn_format_y2k) Warning LangEnabledBy(C ObjC C++ ObjC++,Wformat=,warn_format >= 2, 0)
 467 Warn about strftime formats yielding 2-digit years
 468
 469 Wformat-zero-length
 470 C ObjC C++ ObjC++ Var(warn_format_zero_length) Warning LangEnabledBy(C ObjC C++ ObjC++,Wformat=,warn_format >= 1, 0)
 471 Warn about zero-length formats
 472
 473 Wformat=
 474 C ObjC C++ ObjC++ Joined RejectNegative UInteger Var(warn_format) Warning LangEnabledBy(C ObjC C++ ObjC++,Wall, 1, 0)
 475 Warn about printf/scanf/strftime/strfmon format string anomalies
 476
 477 Wignored-qualifiers
 478 C C++ Var(warn_ignored_qualifiers) Warning EnabledBy(Wextra)
 479 Warn whenever type qualifiers are ignored.
 480
 481 Wincompatible-pointer-types
 482 C ObjC Var(warn_incompatible_pointer_types) Init(1) Warning
 483 Warn when there is a conversion between pointers that have incompatible types
 484
 485 Winit-self
 486 C ObjC C++ ObjC++ Var(warn_init_self) Warning LangEnabledBy(C++ ObjC++,Wall)
 487 Warn about variables which are initialized to themselves
 488
 489 Wimplicit
 490 C ObjC Var(warn_implicit) Warning LangEnabledBy(C ObjC,Wall)
 491 Warn about implicit declarations
 492
 493 Wdouble-promotion
 494 C ObjC C++ ObjC++ Var(warn_double_promotion) Warning
 495 Warn about implicit conversions from \"float\" to \"double\"
 496
 497 Wimplicit-function-declaration
 498 C ObjC Var(warn_implicit_function_declaration) Init(-1) Warning LangEnabledBy(C ObjC,Wimplicit)
 499 Warn about implicit function declarations
 500
 501 Wimplicit-int
 502 C ObjC Var(warn_implicit_int) Init(-1) Warning LangEnabledBy(C ObjC,Wimplicit)
 503 Warn when a declaration does not specify a type
 504
 505 Wimport
 506 C ObjC C++ ObjC++ Undocumented Ignore
 507
 508 Winherited-variadic-ctor
 509 C++ ObjC++ Var(warn_inh_var_ctor) Init(1) Warning
 510 Warn about C++11 inheriting constructors when the base has a variadic constructor
 511
 512 Wint-conversion
 513 C ObjC Var(warn_int_conversion) Init(1) Warning
 514 Warn about incompatible integer to pointer and pointer to integer conversions
 515
 516 Wint-to-pointer-cast
 517 C ObjC C++ ObjC++ Var(warn_int_to_pointer_cast) Init(1) Warning
 518 Warn when there is a cast to a pointer from an integer of a different size
 519
 520 Winvalid-offsetof
 521 C++ ObjC++ Var(warn_invalid_offsetof) Init(1) Warning
 522 Warn about invalid uses of the \"offsetof\" macro
 523
 524 Winvalid-pch
 525 C ObjC C++ ObjC++ CPP(warn_invalid_pch) CppReason(CPP_W_INVALID_PCH) Var(cpp_warn_invalid_pch) Init(0) Warning
 526 Warn about PCH files that are found but not used
 527
 528 Wjump-misses-init
 529 C ObjC Var(warn_jump_misses_init) Warning LangEnabledby(C ObjC,Wc++-compat)
 530 Warn when a jump misses a variable initialization
 531
 532 Wliteral-suffix
 533 C++ ObjC++ CPP(warn_literal_suffix) CppReason(CPP_W_LITERAL_SUFFIX) Var(cpp_warn_literal_suffix) Init(1) Warning
 534 Warn when a string or character literal is followed by a ud-suffix which does not begin with an underscore.
 535
 536 Wlogical-op
 537 C ObjC C++ ObjC++ Var(warn_logical_op) Init(0) Warning
 538 Warn when a logical operator is suspiciously always evaluating to true or false
 539
 540 Wlogical-not-parentheses
 541 C ObjC C++ ObjC++ Var(warn_logical_not_paren) Warning LangEnabledBy(C ObjC C++ ObjC++,Wall)
 542 Warn when logical not is used on the left hand side operand of a comparison
 543
 544 Wlong-long
 545 C ObjC C++ ObjC++ CPP(cpp_warn_long_long) CppReason(CPP_W_LONG_LONG) Var(warn_long_long) Init(-1) Warning LangEnabledBy(C ObjC,Wc90-c99-compat)
 546 Do not warn about using \"long long\" when -pedantic
 547
 548 Wmain
 549 C ObjC C++ ObjC++ Var(warn_main) Init(-1) Warning LangEnabledBy(C ObjC,Wall, 2, 0)
 550 Warn about suspicious declarations of \"main\"
 551
 552 Wmain
 553 LangEnabledBy(C ObjC C++ ObjC++,Wpedantic, 2, 0)
 554 ;
 555
 556 Wmemset-transposed-args
 557 C ObjC C++ ObjC++ Var(warn_memset_transposed_args) Warning LangEnabledBy(C ObjC C++ ObjC++,Wall)
 558 Warn about suspicious calls to memset where the third argument is constant literal zero and the second is not
 559
 560 Wmisleading-indentation
 561 C C++ Common Var(warn_misleading_indentation) Warning
 562 Warn when the indentation of the code does not reflect the block structure
 563
 564 Wmissing-braces
 565 C ObjC C++ ObjC++ Var(warn_missing_braces) Warning LangEnabledBy(C ObjC,Wall)
 566 Warn about possibly missing braces around initializers
 567
 568 Wmissing-declarations
 569 C ObjC C++ ObjC++ Var(warn_missing_declarations) Warning
 570 Warn about global functions without previous declarations
 571
 572 Wmissing-field-initializers
 573 C ObjC C++ ObjC++ Var(warn_missing_field_initializers) Warning EnabledBy(Wextra)
 574 Warn about missing fields in struct initializers
 575
 576 Wmultiple-inheritance
 577 C++ ObjC++ Var(warn_multiple_inheritance) Warning
 578 Warn on direct multiple inheritance
 579
 580 Wnamespaces
 581 C++ ObjC++ Var(warn_namespaces) Warning
 582 Warn on namespace definition
 583
 584 Wsized-deallocation
 585 C++ ObjC++ Var(warn_sized_deallocation) Warning EnabledBy(Wextra)
 586 Warn about missing sized deallocation functions
 587
 588 Wsizeof-pointer-memaccess
 589 C ObjC C++ ObjC++ Var(warn_sizeof_pointer_memaccess) Warning LangEnabledBy(C ObjC C++ ObjC++,Wall)
 590 Warn about suspicious length parameters to certain string functions if the argument uses sizeof
 591
 592 Wsizeof-array-argument
 593 C ObjC C++ ObjC++ Var(warn_sizeof_array_argument) Warning Init(1)
 594 Warn when sizeof is applied on a parameter declared as an array
 595
 596 Wsuggest-attribute=format
 597 C ObjC C++ ObjC++ Var(warn_suggest_attribute_format) Warning
 598 Warn about functions which might be candidates for format attributes
 599
 600 Wsuggest-override
 601 C++ ObjC++ Var(warn_override) Warning
 602 Suggest that the override keyword be used when the declaration of a virtual
 603 function overrides another.
 604
 605 Wswitch
 606 C ObjC C++ ObjC++ Var(warn_switch) Warning LangEnabledBy(C ObjC C++ ObjC++,Wall)
 607 Warn about enumerated switches, with no default, missing a case
 608
 609 Wswitch-default
 610 C ObjC C++ ObjC++ Var(warn_switch_default) Warning
 611 Warn about enumerated switches missing a \"default:\" statement
 612
 613 Wswitch-enum
 614 C ObjC C++ ObjC++ Var(warn_switch_enum) Warning
 615 Warn about all enumerated switches missing a specific case
 616
 617 Wswitch-bool
 618 C ObjC C++ ObjC++ Var(warn_switch_bool) Warning Init(1)
 619 Warn about switches with boolean controlling expression
 620
 621 Wtemplates
 622 C++ ObjC++ Var(warn_templates) Warning
 623 Warn on primary template declaration
 624
 625 Wmissing-format-attribute
 626 C ObjC C++ ObjC++ Alias(Wsuggest-attribute=format)
 627 ;
 628
 629 Wmissing-include-dirs
 630 C ObjC C++ ObjC++ CPP(warn_missing_include_dirs) CppReason(CPP_W_MISSING_INCLUDE_DIRS) Var(cpp_warn_missing_include_dirs) Init(0) Warning
 631 Warn about user-specified include directories that do not exist
 632
 633 Wmissing-parameter-type
 634 C ObjC Var(warn_missing_parameter_type) Warning EnabledBy(Wextra)
 635 Warn about function parameters declared without a type specifier in K&R-style functions
 636
 637 Wmissing-prototypes
 638 C ObjC Var(warn_missing_prototypes) Warning
 639 Warn about global functions without prototypes
 640
 641 Wmudflap
 642 C ObjC C++ ObjC++ Ignore Warn(switch %qs is no longer supported)
 643
 644 Wmultichar
 645 C ObjC C++ ObjC++ CPP(warn_multichar) CppReason(CPP_W_MULTICHAR) Var(cpp_warn_multichar) Init(0) Warning
 646 Warn about use of multi-character character constants
 647
 648 Wnarrowing
 649 C ObjC C++ ObjC++ Warning Var(warn_narrowing) Init(-1) LangEnabledBy(C++ ObjC++,Wall || Wc++11-compat)
 650 Warn about narrowing conversions within { } that are ill-formed in C++11
 651
 652 Wnested-externs
 653 C ObjC Var(warn_nested_externs) Warning
 654 Warn about \"extern\" declarations not at file scope
 655
 656 Wnoexcept
 657 C++ ObjC++ Var(warn_noexcept) Warning
 658 Warn when a noexcept expression evaluates to false even though the expression can't actually throw
 659
 660 Wnon-template-friend
 661 C++ ObjC++ Var(warn_nontemplate_friend) Init(1) Warning
 662 Warn when non-templatized friend functions are declared within a template
 663
 664 Wnon-virtual-dtor
 665 C++ ObjC++ Var(warn_nonvdtor) Warning LangEnabledBy(C++ ObjC++,Weffc++)
 666 Warn about non-virtual destructors
 667
 668 Wnonnull
 669 C ObjC C++ ObjC++ Var(warn_nonnull) Warning LangEnabledBy(C ObjC C++ ObjC++,Wformat=,warn_format >= 1,0)
 670 Warn about NULL being passed to argument slots marked as requiring non-NULL
 671
 672 Wnonnull
 673 C ObjC C++ ObjC++ LangEnabledBy(C ObjC C++ ObjC++,Wall)
 674 ;
 675
 676 Wnormalized
 677 C ObjC C++ ObjC++ Alias(Wnormalized=,nfc,none)
 678 ;
 679
 680 Wnormalized=
 681 C ObjC C++ ObjC++ RejectNegative Joined Warning CPP(warn_normalize) CppReason(CPP_W_NORMALIZE) Init(normalized_C) Var(cpp_warn_normalize) Enum(cpp_normalize_level)
 682 -Wnormalized=<none|id|nfc|nfkc> Warn about non-normalised Unicode strings
 683
 684 ; Required for these enum values.
 685 SourceInclude
 686 cpplib.h
 687
 688 Enum
 689 Name(cpp_normalize_level) Type(int) UnknownError(argument %qs to %<-Wnormalized%> not recognized)
 690
 691 EnumValue
 692 Enum(cpp_normalize_level) String(none) Value(normalized_none)
 693
 694 EnumValue
 695 Enum(cpp_normalize_level) String(nfkc) Value(normalized_KC)
 696
 697 EnumValue
 698 Enum(cpp_normalize_level) String(id) Value(normalized_identifier_C)
 699
 700 EnumValue
 701 Enum(cpp_normalize_level) String(nfc) Value(normalized_C)
 702
 703 Wold-style-cast
 704 C++ ObjC++ Var(warn_old_style_cast) Warning
 705 Warn if a C-style cast is used in a program
 706
 707 Wold-style-declaration
 708 C ObjC Var(warn_old_style_declaration) Warning EnabledBy(Wextra)
 709 Warn for obsolescent usage in a declaration
 710
 711 Wold-style-definition
 712 C ObjC Var(warn_old_style_definition) Warning
 713 Warn if an old-style parameter definition is used
 714
 715 Wopenmp-simd
 716 C C++ Var(warn_openmp_simd) Warning LangEnabledBy(C C++,Wall)
 717 Warn if a simd directive is overridden by the vectorizer cost model
 718
 719 Woverlength-strings
 720 C ObjC C++ ObjC++ Var(warn_overlength_strings) Warning LangEnabledBy(C ObjC C++ ObjC++,Wpedantic)
 721 Warn if a string is longer than the maximum portable length specified by the standard
 722
 723 Woverloaded-virtual
 724 C++ ObjC++ Var(warn_overloaded_virtual) Warning
 725 Warn about overloaded virtual function names
 726
 727 Woverride-init
 728 C ObjC Var(warn_override_init) Warning EnabledBy(Wextra)
 729 Warn about overriding initializers without side effects
 730
 731 Woverride-init-side-effects
 732 C ObjC Var(warn_override_init_side_effects) Init(1) Warning
 733 Warn about overriding initializers with side effects
 734
 735 Wpacked-bitfield-compat
 736 C ObjC C++ ObjC++ Var(warn_packed_bitfield_compat) Init(-1) Warning
 737 Warn about packed bit-fields whose offset changed in GCC 4.4
 738
 739 Wparentheses
 740 C ObjC C++ ObjC++ Var(warn_parentheses) Warning LangEnabledBy(C ObjC C++ ObjC++,Wall)
 741 Warn about possibly missing parentheses
 742
 743 Wpedantic
 744 C ObjC C++ ObjC++ CPP(cpp_pedantic) CppReason(CPP_W_PEDANTIC) Warning
 745 ; Documented in common.opt
 746
 747 Wpmf-conversions
 748 C++ ObjC++ Var(warn_pmf2ptr) Init(1) Warning
 749 Warn when converting the type of pointers to member functions
 750
 751 Wpointer-arith
 752 C ObjC C++ ObjC++ Var(warn_pointer_arith) Warning LangEnabledBy(C ObjC C++ ObjC++,Wpedantic)
 753 Warn about function pointer arithmetic
 754
 755 Wpointer-sign
 756 C ObjC Var(warn_pointer_sign) Warning LangEnabledBy(C ObjC,Wall || Wpedantic)
 757 Warn when a pointer differs in signedness in an assignment
 758
 759 Wpointer-to-int-cast
 760 C ObjC Var(warn_pointer_to_int_cast) Init(1) Warning
 761 Warn when a pointer is cast to an integer of a different size
 762
 763 Wpragmas
 764 C ObjC C++ ObjC++ Var(warn_pragmas) Init(1) Warning
 765 Warn about misuses of pragmas
 766
 767 Wproperty-assign-default
 768 ObjC ObjC++ Var(warn_property_assign_default) Init(1) Warning
 769 Warn if a property for an Objective-C object has no assign semantics specified
 770
 771 Wprotocol
 772 ObjC ObjC++ Var(warn_protocol) Init(1) Warning
 773 Warn if inherited methods are unimplemented
 774
 775 Wredundant-decls
 776 C ObjC C++ ObjC++ Var(warn_redundant_decls) Warning
 777 Warn about multiple declarations of the same object
 778
 779 Wreorder
 780 C++ ObjC++ Var(warn_reorder) Warning LangEnabledBy(C++ ObjC++,Wall)
 781 Warn when the compiler reorders code
 782
 783 Wreturn-type
 784 C ObjC C++ ObjC++ Var(warn_return_type) Warning LangEnabledBy(C ObjC C++ ObjC++,Wall)
 785 Warn whenever a function's return type defaults to \"int\" (C), or about inconsistent return types (C++)
 786
 787 Wselector
 788 ObjC ObjC++ Var(warn_selector) Warning
 789 Warn if a selector has multiple methods
 790
 791 Wsequence-point
 792 C ObjC C++ ObjC++ Var(warn_sequence_point) Warning LangEnabledBy(C ObjC C++ ObjC++,Wall)
 793 Warn about possible violations of sequence point rules
 794
 795 Wshadow-ivar
 796 ObjC ObjC++ Var(warn_shadow_ivar) EnabledBy(Wshadow) Init(1) Warning
 797 Warn if a local declaration hides an instance variable
 798
 799 Wshift-overflow
 800 C ObjC C++ ObjC++ Warning Alias(Wshift-overflow=, 1, 0)
 801 Warn if left shift of a signed value overflows
 802
 803 Wshift-overflow=
 804 C ObjC C++ ObjC++ Joined RejectNegative UInteger Var(warn_shift_overflow) Init(-1) Warning
 805 Warn if left shift of a signed value overflows
 806
 807 Wshift-count-negative
 808 C ObjC C++ ObjC++ Var(warn_shift_count_negative) Init(1) Warning
 809 Warn if shift count is negative
 810
 811 Wshift-count-overflow
 812 C ObjC C++ ObjC++ Var(warn_shift_count_overflow) Init(1) Warning
 813 Warn if shift count >= width of type
 814
 815 Wshift-negative-value
 816 C ObjC C++ ObjC++ Var(warn_shift_negative_value) Init(-1) Warning
 817 Warn if left shifting a negative value
 818
 819 Wsign-compare
 820 C ObjC C++ ObjC++ Var(warn_sign_compare) Warning LangEnabledBy(C++ ObjC++,Wall)
 821 Warn about signed-unsigned comparisons
 822
 823 Wsign-compare
 824 C ObjC C++ ObjC++ EnabledBy(Wextra)
 825 ;
 826
 827 Wsign-conversion
 828 C ObjC C++ ObjC++ Var(warn_sign_conversion) LangEnabledBy(C ObjC,Wconversion)
 829 Warn for implicit type conversions between signed and unsigned integers
 830
 831 Wsign-promo
 832 C++ ObjC++ Var(warn_sign_promo) Warning
 833 Warn when overload promotes from unsigned to signed
 834
 835 Wstrict-null-sentinel
 836 C++ ObjC++ Warning Var(warn_strict_null_sentinel)
 837 Warn about uncasted NULL used as sentinel
 838
 839 Wstrict-prototypes
 840 C ObjC Var(warn_strict_prototypes) Warning
 841 Warn about unprototyped function declarations
 842
 843 Wstrict-aliasing=
 844 C ObjC C++ ObjC++ LangEnabledBy(C ObjC C++ ObjC++,Wall, 3, 0)
 845 ;
 846
 847 Wstrict-overflow=
 848 C ObjC C++ ObjC++ LangEnabledBy(C ObjC C++ ObjC++,Wall, 1, 0)
 849 ;
 850
 851 Wstrict-selector-match
 852 ObjC ObjC++ Var(warn_strict_selector_match) Warning
 853 Warn if type signatures of candidate methods do not match exactly
 854
 855 Wsync-nand
 856 C C++ Var(warn_sync_nand) Init(1) Warning
 857 Warn when __sync_fetch_and_nand and __sync_nand_and_fetch built-in functions are used
 858
 859 Wsynth
 860 C++ ObjC++ Var(warn_synth) Warning
 861 Deprecated.  This switch has no effect
 862
 863 Wsystem-headers
 864 C ObjC C++ ObjC++ Warning
 865 ; Documented in common.opt
 866
 867 Wtautological-compare
 868 C ObjC C++ ObjC++ Var(warn_tautological_compare) Warning LangEnabledBy(C ObjC C++ ObjC++,Wall)
 869 Warn if a comparison always evaluates to true or false
 870
 871 Wterminate
 872 C++ ObjC++ Warning Var(warn_terminate) Init(1)
 873 Warn if a throw expression will always result in a call to terminate()
 874
 875 Wtraditional
 876 C ObjC CPP(cpp_warn_traditional) CppReason(CPP_W_TRADITIONAL) Var(warn_traditional) Init(0) Warning
 877 Warn about features not present in traditional C
 878
 879 Wtraditional-conversion
 880 C ObjC Var(warn_traditional_conversion) Warning
 881 Warn of prototypes causing type conversions different from what would happen in the absence of prototype
 882
 883 Wtrigraphs
 884 C ObjC C++ ObjC++ CPP(warn_trigraphs) CppReason(CPP_W_TRIGRAPHS) Var(cpp_warn_trigraphs) Init(2) Warning LangEnabledBy(C ObjC C++ ObjC++,Wall)
 885 Warn if trigraphs are encountered that might affect the meaning of the program
 886
 887 Wundeclared-selector
 888 ObjC ObjC++ Var(warn_undeclared_selector) Warning
 889 Warn about @selector()s without previously declared methods
 890
 891 Wundef
 892 C ObjC C++ ObjC++ CPP(warn_undef) CppReason(CPP_W_UNDEF) Var(cpp_warn_undef) Init(0) Warning
 893 Warn if an undefined macro is used in an #if directive
 894
 895 Wuninitialized
 896 C ObjC C++ ObjC++ LangEnabledBy(C ObjC C++ ObjC++,Wall)
 897 ;
 898
 899 Wmaybe-uninitialized
 900 C ObjC C++ ObjC++ LangEnabledBy(C ObjC C++ ObjC++,Wall)
 901 ;
 902
 903 Wunknown-pragmas
 904 C ObjC C++ ObjC++ Warning Var(warn_unknown_pragmas) LangEnabledBy(C ObjC C++ ObjC++,Wall, 1, 0)
 905 Warn about unrecognized pragmas
 906
 907 Wunsuffixed-float-constants
 908 C ObjC Var(warn_unsuffixed_float_constants) Warning
 909 Warn about unsuffixed float constants
 910
 911 Wunused
 912 C ObjC C++ ObjC++ LangEnabledBy(C ObjC C++ ObjC++,Wall)
 913 ; documented in common.opt
 914
 915 Wunused-local-typedefs
 916 C ObjC C++ ObjC++ Var(warn_unused_local_typedefs) Warning EnabledBy(Wunused)
 917 Warn when typedefs locally defined in a function are not used
 918
 919 Wunused-macros
 920 C ObjC C++ ObjC++ CppReason(CPP_W_UNUSED_MACROS) Var(cpp_warn_unused_macros) Warning
 921 Warn about macros defined in the main file that are not used
 922
 923 Wunused-result
 924 C ObjC C++ ObjC++ Var(warn_unused_result) Init(1) Warning
 925 Warn if a caller of a function, marked with attribute warn_unused_result, does not use its return value
 926
 927 Wunused-variable
 928 C ObjC C++ ObjC++ LangEnabledBy(C ObjC C++ ObjC++,Wunused)
 929 ; documented in common.opt
 930
 931 Wunused-const-variable
 932 C ObjC C++ ObjC++ Var(warn_unused_const_variable) Warning LangEnabledBy(C ObjC,Wunused-variable)
 933 Warn when a const variable is unused
 934
 935 Wvariadic-macros
 936 C ObjC C++ ObjC++ CPP(warn_variadic_macros) CppReason(CPP_W_VARIADIC_MACROS) Var(cpp_warn_variadic_macros) Init(0) Warning LangEnabledBy(C ObjC C++ ObjC++,Wpedantic || Wtraditional)
 937 Warn about using variadic macros
 938
 939 Wvarargs
 940 C ObjC C++ ObjC++ Warning Var(warn_varargs) Init(1)
 941 Warn about questionable usage of the macros used to retrieve variable arguments
 942
 943 Wvla
 944 C ObjC C++ ObjC++ Var(warn_vla) Init(-1) Warning
 945 Warn if a variable length array is used
 946
 947 Wvolatile-register-var
 948 C ObjC C++ ObjC++ Var(warn_volatile_register_var) Warning LangEnabledBy(C ObjC C++ ObjC++,Wall)
 949 Warn when a register variable is declared volatile
 950
 951 Wvirtual-inheritance
 952 C++ ObjC++ Var(warn_virtual_inheritance) Warning
 953 Warn on direct virtual inheritance
 954
 955 Wvirtual-move-assign
 956 C++ ObjC++ Var(warn_virtual_move_assign) Warning Init(1)
 957 Warn if a virtual base has a non-trivial move assignment operator
 958
 959 Wwrite-strings
 960 C ObjC C++ ObjC++ Var(warn_write_strings) Warning
 961 In C++, nonzero means warn about deprecated conversion from string literals to 'char *'.  In C, similar warning, except that the conversion is of course not deprecated by the ISO C standard.
 962
 963 Wzero-as-null-pointer-constant
 964 C++ ObjC++ Var(warn_zero_as_null_pointer_constant) Warning
 965 Warn when a literal '0' is used as null pointer
 966
 967 Wuseless-cast
 968 C++ ObjC++ Var(warn_useless_cast) Warning
 969 Warn about useless casts
 970
 971 Wsubobject-linkage
 972 C++ ObjC++ Var(warn_subobject_linkage) Warning Init(1)
 973 Warn if a class type has a base or a field whose type uses the anonymous
 974 namespace or depends on a type with no linkage
 975
 976 ansi
 977 C ObjC C++ ObjC++
 978 A synonym for -std=c89 (for C) or -std=c++98 (for C++)
 979
 980 d
 981 C ObjC C++ ObjC++ Joined
 982 ; Documented in common.opt.  FIXME - what about -dI, -dD, -dN and -dD?
 983
 984 fabi-compat-version=
 985 C++ ObjC++ Joined RejectNegative UInteger Var(flag_abi_compat_version) Init(-1)
 986 The version of the C++ ABI used for -Wabi warnings and link compatibility aliases
 987
 988 faccess-control
 989 C++ ObjC++ Var(flag_access_control) Init(1)
 990 Enforce class member access control semantics
 991
 992 fada-spec-parent=
 993 C ObjC C++ ObjC++ RejectNegative Joined Var(ada_specs_parent)
 994 -fada-spec-parent=unit  Dump Ada specs as child units of given parent
 995
 996 fall-virtual
 997 C++ ObjC++ Ignore Warn(switch %qs is no longer supported)
 998
 999 fallow-parameterless-variadic-functions
1000 C ObjC Var(flag_allow_parameterless_variadic_functions)
1001 Allow variadic functions without named parameter
1002
1003 falt-external-templates
1004 C++ ObjC++ Ignore Warn(switch %qs is no longer supported)
1005 No longer supported
1006
1007 fasm
1008 C ObjC C++ ObjC++ Var(flag_no_asm, 0)
1009 Recognize the \"asm\" keyword
1010
1011 ; Define extra predefined macros for use in libgcc.
1012 fbuilding-libgcc
1013 C ObjC C++ ObjC++ Undocumented Var(flag_building_libgcc)
1014
1015 fbuiltin
1016 C ObjC C++ ObjC++ Var(flag_no_builtin, 0)
1017 Recognize built-in functions
1018
1019 fbuiltin-
1020 C ObjC C++ ObjC++ Joined
1021
1022 fcanonical-system-headers
1023 C ObjC C++ ObjC++
1024 Where shorter, use canonicalized paths to systems headers.
1025
1026 fcheck-pointer-bounds
1027 C ObjC C++ ObjC++ LTO Report Var(flag_check_pointer_bounds)
1028 Add Pointer Bounds Checker instrumentation.  fchkp-* flags are used to
1029 control instrumentation.  Currently available for C, C++ and ObjC.
1030
1031 fchkp-check-incomplete-type
1032 C ObjC C++ ObjC++ LTO Report Var(flag_chkp_incomplete_type) Init(1)
1033 Generate pointer bounds checks for variables with incomplete type
1034
1035 fchkp-zero-input-bounds-for-main
1036 C ObjC C++ ObjC++ LTO Report Var(flag_chkp_zero_input_bounds_for_main) Init(0)
1037 Use zero bounds for all incoming arguments in 'main' function.  It helps when
1038 instrumented binaries are used with legacy libs.
1039
1040 fchkp-first-field-has-own-bounds
1041 C ObjC C++ ObjC++ LTO RejectNegative Report Var(flag_chkp_first_field_has_own_bounds)
1042 Forces Pointer Bounds Checker to use narrowed bounds for address of the first
1043 field in the structure.  By default pointer to the first field has the same
1044 bounds as pointer to the whole structure.
1045
1046 fchkp-narrow-bounds
1047 C ObjC C++ ObjC++ LTO Report Var(flag_chkp_narrow_bounds) Init(1)
1048 Control how Pointer Bounds Checker handle pointers to object fields.  When
1049 narrowing is on, field bounds are used.  Otherwise full object bounds are used.
1050
1051 fchkp-narrow-to-innermost-array
1052 C ObjC C++ ObjC++ LTO RejectNegative Report Var(flag_chkp_narrow_to_innermost_arrray)
1053 Forces Pointer Bounds Checker to use bounds of the innermost arrays in case of
1054 nested static arryas access.  By default outermost array is used.
1055
1056 fchkp-optimize
1057 C ObjC C++ ObjC++ LTO Report Var(flag_chkp_optimize) Init(-1)
1058 Allow Pointer Bounds Checker optimizations.  By default allowed
1059 on optimization levels >0.
1060
1061 fchkp-use-fast-string-functions
1062 C ObjC C++ ObjC++ LTO Report Var(flag_chkp_use_fast_string_functions) Init(0)
1063 Allow to use *_nobnd versions of string functions by Pointer Bounds Checker.
1064
1065 fchkp-use-nochk-string-functions
1066 C ObjC C++ ObjC++ LTO Report Var(flag_chkp_use_nochk_string_functions) Init(0)
1067 Allow to use *_nochk versions of string functions by Pointer Bounds Checker.
1068
1069 fchkp-use-static-bounds
1070 C ObjC C++ ObjC++ LTO Report Var(flag_chkp_use_static_bounds) Init(1)
1071 Use statically initialized variable for vars bounds instead of
1072 generating them each time it is required.
1073
1074 fchkp-use-static-const-bounds
1075 C ObjC C++ ObjC++ LTO Report Var(flag_chkp_use_static_const_bounds) Init(-1)
1076 Use statically initialized variable for constant bounds instead of
1077 generating them each time it is required.
1078
1079 fchkp-treat-zero-dynamic-size-as-infinite
1080 C ObjC C++ ObjC++ LTO Report Var(flag_chkp_zero_dynamic_size_as_infinite) Init(0)
1081 With this option zero size obtained dynamically for objects with
1082 incomplete type will be treated as infinite.
1083
1084 fchkp-check-read
1085 C ObjC C++ ObjC++ LTO Report Var(flag_chkp_check_read) Init(1)
1086 Generate checks for all read accesses to memory.
1087
1088 fchkp-check-write
1089 C ObjC C++ ObjC++ LTO Report Var(flag_chkp_check_write) Init(1)
1090 Generate checks for all write accesses to memory.
1091
1092 fchkp-store-bounds
1093 C ObjC C++ ObjC++ LTO Report Var(flag_chkp_store_bounds) Init(1)
1094 Generate bounds stores for pointer writes.
1095
1096 fchkp-instrument-calls
1097 C ObjC C++ ObjC++ LTO Report Var(flag_chkp_instrument_calls) Init(1)
1098 Generate bounds passing for calls.
1099
1100 fchkp-instrument-marked-only
1101 C ObjC C++ ObjC++ LTO Report Var(flag_chkp_instrument_marked_only) Init(0)
1102 Instrument only functions marked with bnd_instrument attribute.
1103
1104 fchkp-use-wrappers
1105 C ObjC C++ ObjC++ LTO Report Var(flag_chkp_use_wrappers) Init(1)
1106 Transform instrumented builtin calls into calls to wrappers.
1107
1108 static-libmpx
1109 Driver
1110
1111 static-libmpxwrappers
1112 Driver
1113
1114 fcilkplus
1115 C ObjC C++ ObjC++ LTO Report Var(flag_cilkplus) Init(0)
1116 Enable Cilk Plus
1117
1118 fconcepts
1119 C++ ObjC++ Var(flag_concepts)
1120 Enable support for C++ concepts
1121
1122 fcond-mismatch
1123 C ObjC C++ ObjC++
1124 Allow the arguments of the '?' operator to have different types
1125
1126 fconserve-space
1127 C++ ObjC++ Var(flag_conserve_space)
1128 Does nothing.  Preserved for backward compatibility.
1129
1130 fconstant-string-class=
1131 ObjC ObjC++ Joined MissingArgError(no class name specified with %qs)
1132 -fconst-string-class=<name>     Use class <name> for constant strings
1133
1134 fconstexpr-depth=
1135 C++ ObjC++ Joined RejectNegative UInteger Var(max_constexpr_depth) Init(512)
1136 -fconstexpr-depth=<number>      Specify maximum constexpr recursion depth
1137
1138 fdebug-cpp
1139 C ObjC C++ ObjC++
1140 Emit debug annotations during preprocessing
1141
1142 fdeduce-init-list
1143 C++ ObjC++ Var(flag_deduce_init_list) Init(0)
1144 -fdeduce-init-list      enable deduction of std::initializer_list for a template type parameter from a brace-enclosed initializer-list
1145
1146 fdeclone-ctor-dtor
1147 C++ ObjC++ Var(flag_declone_ctor_dtor) Init(-1)
1148 Factor complex constructors and destructors to favor space over speed
1149
1150 fdefault-inline
1151 C++ ObjC++ Ignore
1152 Does nothing.  Preserved for backward compatibility.
1153
1154 fdirectives-only
1155 C ObjC C++ ObjC++
1156 Preprocess directives only.
1157
1158 fdollars-in-identifiers
1159 C ObjC C++ ObjC++
1160 Permit '$' as an identifier character
1161
1162 fdump-ada-spec
1163 C ObjC C++ ObjC++ RejectNegative Var(flag_dump_ada_spec)
1164 Write all declarations as Ada code transitively
1165
1166 fdump-ada-spec-slim
1167 C ObjC C++ ObjC++ RejectNegative Var(flag_dump_ada_spec_slim)
1168 Write all declarations as Ada code for the given file only
1169
1170 felide-constructors
1171 C++ ObjC++ Var(flag_elide_constructors) Init(1)
1172
1173 fenforce-eh-specs
1174 C++ ObjC++ Var(flag_enforce_eh_specs) Init(1)
1175 Generate code to check exception specifications
1176
1177 fenum-int-equiv
1178 C++ ObjC++ Ignore Warn(switch %qs is no longer supported)
1179
1180 fexec-charset=
1181 C ObjC C++ ObjC++ Joined RejectNegative
1182 -fexec-charset=<cset>   Convert all strings and character constants to character set <cset>
1183
1184 fextended-identifiers
1185 C ObjC C++ ObjC++
1186 Permit universal character names (\\u and \\U) in identifiers
1187
1188 finput-charset=
1189 C ObjC C++ ObjC++ Joined RejectNegative
1190 -finput-charset=<cset>  Specify the default character set for source files
1191
1192 fextern-tls-init
1193 C++ ObjC++ Var(flag_extern_tls_init) Init(-1)
1194 Support dynamic initialization of thread-local variables in a different translation unit
1195
1196 fexternal-templates
1197 C++ ObjC++ Ignore Warn(switch %qs is no longer supported)
1198
1199 ffor-scope
1200 C++ ObjC++ Var(flag_new_for_scope) Init(1)
1201 Scope of for-init-statement variables is local to the loop
1202
1203 ffreestanding
1204 C ObjC C++ ObjC++
1205 Do not assume that standard C libraries and \"main\" exist
1206
1207 fgnu-keywords
1208 C++ ObjC++ Var(flag_no_gnu_keywords, 0)
1209 Recognize GNU-defined keywords
1210
1211 fgnu-runtime
1212 ObjC ObjC++ LTO Report RejectNegative Var(flag_next_runtime,0) Init(NEXT_OBJC_RUNTIME)
1213 Generate code for GNU runtime environment
1214
1215 fgnu89-inline
1216 C ObjC Var(flag_gnu89_inline) Init(-1)
1217 Use traditional GNU semantics for inline functions
1218
1219 fguiding-decls
1220 C++ ObjC++ Ignore Warn(switch %qs is no longer supported)
1221
1222 fhandle-exceptions
1223 C++ ObjC++ Optimization Alias(fexceptions) Warn({-fhandle-exceptions has been renamed -fexceptions (and is now on by default)})
1224
1225 fhonor-std
1226 C++ ObjC++ Ignore Warn(switch %qs is no longer supported)
1227
1228 fhosted
1229 C ObjC
1230 Assume normal C execution environment
1231
1232 fhuge-objects
1233 C++ ObjC++ Ignore Warn(switch %qs is no longer supported)
1234 No longer supported
1235
1236 fimplement-inlines
1237 C++ ObjC++ Var(flag_implement_inlines) Init(1)
1238 Export functions even if they can be inlined
1239
1240 fimplicit-inline-templates
1241 C++ ObjC++ Var(flag_implicit_inline_templates) Init(1)
1242 Emit implicit instantiations of inline templates
1243
1244 fimplicit-templates
1245 C++ ObjC++ Var(flag_implicit_templates) Init(1)
1246 Emit implicit instantiations of templates
1247
1248 ffriend-injection
1249 C++ ObjC++ Var(flag_friend_injection)
1250 Inject friend functions into enclosing namespace
1251
1252 fkeep-inline-dllexport
1253 C C++ ObjC ObjC++ Var(flag_keep_inline_dllexport) Init(1) Report Condition(TARGET_DLLIMPORT_DECL_ATTRIBUTES)
1254 Don't emit dllexported inline functions unless needed
1255
1256 flabels-ok
1257 C++ ObjC++ Ignore Warn(switch %qs is no longer supported)
1258
1259 flax-vector-conversions
1260 C ObjC C++ ObjC++ Var(flag_lax_vector_conversions)
1261 Allow implicit conversions between vectors with differing numbers of subparts and/or differing element types.
1262
1263 fms-extensions
1264 C ObjC C++ ObjC++ Var(flag_ms_extensions)
1265 Don't warn about uses of Microsoft extensions
1266
1267 fmudflap
1268 C ObjC C++ ObjC++ Ignore Warn(switch %qs is no longer supported)
1269
1270 fmudflapth
1271 C ObjC C++ ObjC++ Ignore Warn(switch %qs is no longer supported)
1272
1273 fmudflapir
1274 C ObjC C++ ObjC++ Ignore Warn(switch %qs is no longer supported)
1275
1276 fname-mangling-version-
1277 C++ ObjC++ Joined Ignore Warn(switch %qs is no longer supported)
1278
1279 fnew-abi
1280 C++ ObjC++ Ignore Warn(switch %qs is no longer supported)
1281
1282 fnext-runtime
1283 ObjC ObjC++ LTO Report RejectNegative Var(flag_next_runtime)
1284 Generate code for NeXT (Apple Mac OS X) runtime environment
1285
1286 fnil-receivers
1287 ObjC ObjC++ Var(flag_nil_receivers) Init(1)
1288 Assume that receivers of Objective-C messages may be nil
1289
1290 flocal-ivars
1291 ObjC ObjC++ Var(flag_local_ivars) Init(1)
1292 Allow access to instance variables as if they were local declarations within instance method implementations.
1293
1294 fivar-visibility=
1295 ObjC ObjC++ Joined RejectNegative Enum(ivar_visibility) Var(default_ivar_visibility) Init(IVAR_VISIBILITY_PROTECTED)
1296 -fvisibility=[private|protected|public|package] Set the default symbol visibility
1297
1298 Enum
1299 Name(ivar_visibility) Type(enum ivar_visibility) UnknownError(unrecognized ivar visibility value %qs)
1300
1301 EnumValue
1302 Enum(ivar_visibility) String(private) Value(IVAR_VISIBILITY_PRIVATE)
1303
1304 EnumValue
1305 Enum(ivar_visibility) String(protected) Value(IVAR_VISIBILITY_PROTECTED)
1306
1307 EnumValue
1308 Enum(ivar_visibility) String(public) Value(IVAR_VISIBILITY_PUBLIC)
1309
1310 EnumValue
1311 Enum(ivar_visibility) String(package) Value(IVAR_VISIBILITY_PACKAGE)
1312
1313 fnonansi-builtins
1314 C++ ObjC++ Var(flag_no_nonansi_builtin, 0)
1315
1316 fnonnull-objects
1317 C++ ObjC++ Ignore Warn(switch %qs is no longer supported)
1318
1319 fnothrow-opt
1320 C++ ObjC++ Optimization Var(flag_nothrow_opt)
1321 Treat a throw() exception specification as noexcept to improve code size
1322
1323 fobjc-abi-version=
1324 ObjC ObjC++ LTO Joined Report RejectNegative UInteger Var(flag_objc_abi)
1325 Specify which ABI to use for Objective-C family code and meta-data generation.
1326
1327 ; Generate special '- .cxx_construct' and '- .cxx_destruct' methods
1328 ; to initialize any non-POD ivars in Objective-C++ classes.
1329 fobjc-call-cxx-cdtors
1330 ObjC++ Var(flag_objc_call_cxx_cdtors)
1331 Generate special Objective-C methods to initialize/destroy non-POD C++ ivars, if needed
1332
1333 fobjc-direct-dispatch
1334 ObjC ObjC++ Var(flag_objc_direct_dispatch)
1335 Allow fast jumps to the message dispatcher
1336
1337 ; Nonzero means that we will allow new ObjC exception syntax (@throw,
1338 ; @try, etc.) in source code.
1339 fobjc-exceptions
1340 ObjC ObjC++ Var(flag_objc_exceptions)
1341 Enable Objective-C exception and synchronization syntax
1342
1343 fobjc-gc
1344 ObjC ObjC++ LTO Var(flag_objc_gc)
1345 Enable garbage collection (GC) in Objective-C/Objective-C++ programs
1346
1347 fobjc-nilcheck
1348 ObjC ObjC++ Var(flag_objc_nilcheck,1)
1349 Enable inline checks for nil receivers with the NeXT runtime and ABI version 2.
1350
1351 ; Nonzero means that we generate NeXT setjmp based exceptions.
1352 fobjc-sjlj-exceptions
1353 ObjC ObjC++ Var(flag_objc_sjlj_exceptions) Init(-1)
1354 Enable Objective-C setjmp exception handling runtime
1355
1356 fobjc-std=objc1
1357 ObjC ObjC++ Var(flag_objc1_only)
1358 Conform to the Objective-C 1.0 language as implemented in GCC 4.0
1359
1360 fopenacc
1361 C ObjC C++ ObjC++ LTO Var(flag_openacc)
1362 Enable OpenACC
1363
1364 fopenmp
1365 C ObjC C++ ObjC++ LTO Var(flag_openmp)
1366 Enable OpenMP (implies -frecursive in Fortran)
1367
1368 fopenmp-simd
1369 C ObjC C++ ObjC++ Var(flag_openmp_simd)
1370 Enable OpenMP's SIMD directives
1371
1372 foperator-names
1373 C++ ObjC++
1374 Recognize C++ keywords like \"compl\" and \"xor\"
1375
1376 foptional-diags
1377 C++ ObjC++ Ignore
1378 Does nothing.  Preserved for backward compatibility.
1379
1380 fpch-deps
1381 C ObjC C++ ObjC++
1382
1383 fpch-preprocess
1384 C ObjC C++ ObjC++
1385 Look for and use PCH files even when preprocessing
1386
1387 fpermissive
1388 C++ ObjC++ Var(flag_permissive)
1389 Downgrade conformance errors to warnings
1390
1391 fplan9-extensions
1392 C ObjC Var(flag_plan9_extensions)
1393 Enable Plan 9 language extensions
1394
1395 fpreprocessed
1396 C ObjC C++ ObjC++
1397 Treat the input file as already preprocessed
1398
1399 ftrack-macro-expansion
1400 C ObjC C++ ObjC++ JoinedOrMissing RejectNegative UInteger
1401 ; converted into ftrack-macro-expansion=
1402
1403 ftrack-macro-expansion=
1404 C ObjC C++ ObjC++ JoinedOrMissing RejectNegative UInteger
1405 -ftrack-macro-expansion=<0|1|2>  Track locations of tokens coming from macro expansion and display them in error messages
1406
1407 fpretty-templates
1408 C++ ObjC++ Var(flag_pretty_templates) Init(1)
1409 -fno-pretty-templates Do not pretty-print template specializations as the template signature followed by the arguments
1410
1411 freplace-objc-classes
1412 ObjC ObjC++ LTO Var(flag_replace_objc_classes)
1413 Used in Fix-and-Continue mode to indicate that object files may be swapped in at runtime
1414
1415 frepo
1416 C++ ObjC++
1417 Enable automatic template instantiation
1418
1419 frtti
1420 C++ ObjC++ Optimization Var(flag_rtti) Init(1)
1421 Generate run time type descriptor information
1422
1423 fshort-double
1424 C ObjC C++ ObjC++ LTO Optimization Var(flag_short_double)
1425 Use the same size for double as for float
1426
1427 fshort-enums
1428 C ObjC C++ ObjC++ LTO Optimization Var(flag_short_enums)
1429 Use the narrowest integer type possible for enumeration types
1430
1431 fshort-wchar
1432 C ObjC C++ ObjC++ LTO Optimization Var(flag_short_wchar)
1433 Force the underlying type for \"wchar_t\" to be \"unsigned short\"
1434
1435 fsigned-bitfields
1436 C ObjC C++ ObjC++ Var(flag_signed_bitfields) Init(1)
1437 When \"signed\" or \"unsigned\" is not given make the bitfield signed
1438
1439 fsigned-char
1440 C ObjC C++ ObjC++ LTO Var(flag_signed_char)
1441 Make \"char\" signed by default
1442
1443 fsized-deallocation
1444 C++ ObjC++ Var(flag_sized_deallocation) Init(-1)
1445 Enable C++14 sized deallocation support
1446
1447 fsquangle
1448 C++ ObjC++ Ignore Warn(switch %qs is no longer supported)
1449
1450 fstats
1451 C++ ObjC++ Var(flag_detailed_statistics)
1452 Display statistics accumulated during compilation
1453
1454 fstrict-enums
1455 C++ ObjC++ Optimization Var(flag_strict_enums)
1456 Assume that values of enumeration type are always within the minimum range of that type
1457
1458 fstrict-prototype
1459 C++ ObjC++ Ignore Warn(switch %qs is no longer supported)
1460
1461 ftabstop=
1462 C ObjC C++ ObjC++ Joined RejectNegative UInteger
1463 -ftabstop=<number>      Distance between tab stops for column reporting
1464
1465 ftemplate-backtrace-limit=
1466 C++ ObjC++ Joined RejectNegative UInteger Var(template_backtrace_limit) Init(10)
1467 Set the maximum number of template instantiation notes for a single warning or error
1468
1469 ftemplate-depth-
1470 C++ ObjC++ Joined RejectNegative Undocumented Alias(ftemplate-depth=)
1471
1472 ftemplate-depth=
1473 C++ ObjC++ Joined RejectNegative UInteger
1474 -ftemplate-depth=<number>       Specify maximum template instantiation depth
1475
1476 fthis-is-variable
1477 C++ ObjC++ Ignore Warn(switch %qs is no longer supported)
1478
1479 fthreadsafe-statics
1480 C++ ObjC++ Optimization Var(flag_threadsafe_statics) Init(1)
1481 -fno-threadsafe-statics Do not generate thread-safe code for initializing local statics
1482
1483 funsigned-bitfields
1484 C ObjC C++ ObjC++ Var(flag_signed_bitfields, 0)
1485 When \"signed\" or \"unsigned\" is not given make the bitfield unsigned
1486
1487 funsigned-char
1488 C ObjC C++ ObjC++ LTO Var(flag_signed_char, 0)
1489 Make \"char\" unsigned by default
1490
1491 fuse-cxa-atexit
1492 C++ ObjC++ Var(flag_use_cxa_atexit) Init(DEFAULT_USE_CXA_ATEXIT)
1493 Use __cxa_atexit to register destructors
1494
1495 fuse-cxa-get-exception-ptr
1496 C++ ObjC++ Var(flag_use_cxa_get_exception_ptr) Init(2)
1497 Use __cxa_get_exception_ptr in exception handling
1498
1499 fvisibility-inlines-hidden
1500 C++ ObjC++
1501 Marks all inlined functions and methods as having hidden visibility
1502
1503 fvisibility-ms-compat
1504 C++ ObjC++ Var(flag_visibility_ms_compat)
1505 Changes visibility to match Microsoft Visual Studio by default
1506
1507 fvtable-gc
1508 C++ ObjC++ Ignore Warn(switch %qs is no longer supported)
1509 No longer supported
1510
1511 fvtable-thunks
1512 C++ ObjC++ Ignore Warn(switch %qs is no longer supported)
1513 No longer supported
1514
1515 fweak
1516 C++ ObjC++ Var(flag_weak) Init(1)
1517 Emit common-like symbols as weak symbols
1518
1519 fwide-exec-charset=
1520 C ObjC C++ ObjC++ Joined RejectNegative
1521 -fwide-exec-charset=<cset>      Convert all wide strings and character constants to character set <cset>
1522
1523 fworking-directory
1524 C ObjC C++ ObjC++ Var(flag_working_directory) Init(-1)
1525 Generate a #line directive pointing at the current working directory
1526
1527 fxref
1528 C++ ObjC++ Ignore Warn(switch %qs is no longer supported)
1529 No longer supported
1530
1531 fzero-link
1532 ObjC ObjC++ Var(flag_zero_link)
1533 Generate lazy class lookup (via objc_getClass()) for use in Zero-Link mode
1534
1535 gen-decls
1536 ObjC ObjC++ Var(flag_gen_declaration)
1537 Dump declarations to a .decl file
1538
1539 femit-struct-debug-baseonly
1540 C ObjC C++ ObjC++
1541 -femit-struct-debug-baseonly    Aggressive reduced debug info for structs
1542
1543 femit-struct-debug-reduced
1544 C ObjC C++ ObjC++
1545 -femit-struct-debug-reduced     Conservative reduced debug info for structs
1546
1547 femit-struct-debug-detailed=
1548 C ObjC C++ ObjC++ Joined
1549 -femit-struct-debug-detailed=<spec-list>        Detailed reduced debug info for structs
1550
1551 fext-numeric-literals
1552 C++ ObjC++
1553 Interpret imaginary, fixed-point, or other gnu number suffix as the corresponding
1554 number literal rather than a user-defined number literal.
1555
1556 idirafter
1557 C ObjC C++ ObjC++ Joined Separate MissingArgError(missing path after %qs)
1558 -idirafter <dir>        Add <dir> to the end of the system include path
1559
1560 imacros
1561 C ObjC C++ ObjC++ Joined Separate MissingArgError(missing filename after %qs)
1562 -imacros <file> Accept definition of macros in <file>
1563
1564 imultilib
1565 C ObjC C++ ObjC++ Joined Separate
1566 -imultilib <dir>        Set <dir> to be the multilib include subdirectory
1567
1568 include
1569 C ObjC C++ ObjC++ Joined Separate MissingArgError(missing filename after %qs)
1570 -include <file> Include the contents of <file> before other files
1571
1572 iprefix
1573 C ObjC C++ ObjC++ Joined Separate
1574 -iprefix <path> Specify <path> as a prefix for next two options
1575
1576 isysroot
1577 C ObjC C++ ObjC++ Joined Separate MissingArgError(missing path after %qs)
1578 -isysroot <dir> Set <dir> to be the system root directory
1579
1580 isystem
1581 C ObjC C++ ObjC++ Joined Separate MissingArgError(missing path after %qs)
1582 -isystem <dir>  Add <dir> to the start of the system include path
1583
1584 iquote
1585 C ObjC C++ ObjC++ Joined Separate MissingArgError(missing path after %qs)
1586 -iquote <dir>   Add <dir> to the end of the quote include path
1587
1588 iwithprefix
1589 C ObjC C++ ObjC++ Joined Separate
1590 -iwithprefix <dir>      Add <dir> to the end of the system include path
1591
1592 iwithprefixbefore
1593 C ObjC C++ ObjC++ Joined Separate
1594 -iwithprefixbefore <dir>        Add <dir> to the end of the main include path
1595
1596 lang-asm
1597 C Undocumented RejectDriver
1598
1599 no-integrated-cpp
1600 Driver
1601
1602 nostdinc
1603 C ObjC C++ ObjC++
1604 Do not search standard system include directories (those specified with -isystem will still be used)
1605
1606 nostdinc++
1607 C++ ObjC++
1608 Do not search standard system include directories for C++
1609
1610 o
1611 C ObjC C++ ObjC++ Joined Separate
1612 ; Documented in common.opt
1613
1614 pedantic
1615 C ObjC C++ ObjC++ Alias(Wpedantic)
1616 ; Documented in common.opt
1617
1618 print-objc-runtime-info
1619 ObjC ObjC++
1620 Generate C header of platform-specific features
1621
1622 remap
1623 C ObjC C++ ObjC++
1624 Remap file names when including files
1625
1626 std=c++98
1627 C++ ObjC++
1628 Conform to the ISO 1998 C++ standard revised by the 2003 technical corrigendum
1629
1630 std=c++03
1631 C++ ObjC++ Alias(std=c++98)
1632 Conform to the ISO 1998 C++ standard revised by the 2003 technical corrigendum
1633
1634 std=c++11
1635 C++ ObjC++
1636 Conform to the ISO 2011 C++ standard
1637
1638 std=c++0x
1639 C++ ObjC++ Alias(std=c++11) Undocumented
1640 Deprecated in favor of -std=c++11
1641
1642 std=c++1y
1643 C++ ObjC++ Alias(std=c++14) Undocumented
1644 Deprecated in favor of -std=c++14
1645
1646 std=c++14
1647 C++ ObjC++
1648 Conform to the ISO 2014 C++ standard
1649
1650 std=c++1z
1651 C++ ObjC++
1652 Conform to the ISO 2017(?) C++ draft standard (experimental and incomplete support)
1653
1654 std=c++17
1655 C++ ObjC++ Alias(std=c++1z) Undocumented
1656
1657 std=c11
1658 C ObjC
1659 Conform to the ISO 2011 C standard
1660
1661 std=c1x
1662 C ObjC Alias(std=c11)
1663 Deprecated in favor of -std=c11
1664
1665 std=c89
1666 C ObjC Alias(std=c90)
1667 Conform to the ISO 1990 C standard
1668
1669 std=c90
1670 C ObjC
1671 Conform to the ISO 1990 C standard
1672
1673 std=c99
1674 C ObjC
1675 Conform to the ISO 1999 C standard
1676
1677 std=c9x
1678 C ObjC Alias(std=c99)
1679 Deprecated in favor of -std=c99
1680
1681 std=gnu++98
1682 C++ ObjC++
1683 Conform to the ISO 1998 C++ standard revised by the 2003 technical
1684 corrigendum with GNU extensions
1685
1686 std=gnu++03
1687 C++ ObjC++ Alias(std=gnu++98)
1688 Conform to the ISO 1998 C++ standard revised by the 2003 technical
1689 corrigendum with GNU extensions
1690
1691 std=gnu++11
1692 C++ ObjC++
1693 Conform to the ISO 2011 C++ standard with GNU extensions (experimental and incomplete support)
1694
1695 std=gnu++0x
1696 C++ ObjC++ Alias(std=gnu++11) Undocumented
1697 Deprecated in favor of -std=gnu++11
1698
1699 std=gnu++1y
1700 C++ ObjC++ Alias(std=gnu++14) Undocumented
1701 Deprecated in favor of -std=gnu++14
1702
1703 std=gnu++14
1704 C++ ObjC++
1705 Conform to the ISO 2014 C++ standard with GNU extensions (experimental and incomplete support)
1706
1707 std=gnu++1z
1708 C++ ObjC++
1709 Conform to the ISO 201z(7?) C++ draft standard with GNU extensions (experimental and incomplete support)
1710
1711 std=gnu++17
1712 C++ ObjC++ Alias(std=gnu++1z) Undocumented
1713
1714 std=gnu11
1715 C ObjC
1716 Conform to the ISO 2011 C standard with GNU extensions
1717
1718 std=gnu1x
1719 C ObjC Alias(std=gnu11)
1720 Deprecated in favor of -std=gnu11
1721
1722 std=gnu89
1723 C ObjC Alias(std=gnu90)
1724 Conform to the ISO 1990 C standard with GNU extensions
1725
1726 std=gnu90
1727 C ObjC
1728 Conform to the ISO 1990 C standard with GNU extensions
1729
1730 std=gnu99
1731 C ObjC
1732 Conform to the ISO 1999 C standard with GNU extensions
1733
1734 std=gnu9x
1735 C ObjC Alias(std=gnu99)
1736 Deprecated in favor of -std=gnu99
1737
1738 std=iso9899:1990
1739 C ObjC Alias(std=c90)
1740 Conform to the ISO 1990 C standard
1741
1742 std=iso9899:199409
1743 C ObjC
1744 Conform to the ISO 1990 C standard as amended in 1994
1745
1746 std=iso9899:1999
1747 C ObjC Alias(std=c99)
1748 Conform to the ISO 1999 C standard
1749
1750 std=iso9899:199x
1751 C ObjC Alias(std=c99)
1752 Deprecated in favor of -std=iso9899:1999
1753
1754 std=iso9899:2011
1755 C ObjC Alias(std=c11)
1756 Conform to the ISO 2011 C standard
1757
1758 traditional
1759 Driver
1760
1761 traditional-cpp
1762 C ObjC C++ ObjC++
1763 Enable traditional preprocessing
1764
1765 trigraphs
1766 C ObjC C++ ObjC++
1767 -trigraphs      Support ISO C trigraphs
1768
1769 undef
1770 C ObjC C++ ObjC++ Var(flag_undef)
1771 Do not predefine system-specific and GCC-specific macros
1772
1773 v
1774 C ObjC C++ ObjC++
1775 ; Documented in common.opt
1776
1777 w
1778 C ObjC C++ ObjC++
1779 ; Documented in common.opt
1780
1781 ; This comment is to ensure we retain the blank line above.