1 ; Options for the C, ObjC, C++ and ObjC++ front ends.
2 ; Copyright (C) 2003-2014 Free Software Foundation, Inc.
4 ; This file is part of GCC.
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
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
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/>.
20 ; See the GCC internals manual for a description of this file's format.
22 ; Please try to keep this file in ASCII collating order.
37 C ObjC C++ ObjC++ Warning Alias(Wall)
40 C ObjC C++ ObjC++ Alias(ansi)
43 C ObjC C++ ObjC++ Separate Alias(A) MissingArgError(assertion missing after %qs)
46 C ObjC C++ ObjC++ Joined Alias(A) MissingArgError(assertion missing after %qs)
49 C ObjC C++ ObjC++ Alias(C)
52 C ObjC C++ ObjC++ Alias(CC)
55 C ObjC C++ ObjC++ Separate Alias(D) MissingArgError(macro name missing after %qs)
58 C ObjC C++ ObjC++ Joined Alias(D) MissingArgError(macro name missing after %qs)
61 C ObjC C++ ObjC++ Alias(M)
64 C ObjC C++ ObjC++ Separate Alias(d)
67 C ObjC C++ ObjC++ Joined Alias(d)
70 C ObjC C++ ObjC++ Separate Alias(imacros) MissingArgError(missing filename after %qs)
73 C ObjC C++ ObjC++ Joined Alias(imacros) MissingArgError(missing filename after %qs)
76 C ObjC C++ ObjC++ Separate Alias(include) MissingArgError(missing filename after %qs)
79 C ObjC C++ ObjC++ Joined Alias(include) MissingArgError(missing filename after %qs)
82 C ObjC C++ ObjC++ Alias(I, -)
85 C ObjC C++ ObjC++ Separate Alias(I) MissingArgError(missing path after %qs)
88 C ObjC C++ ObjC++ Joined Alias(I) MissingArgError(missing path after %qs)
90 -include-directory-after
91 C ObjC C++ ObjC++ Separate Alias(idirafter) MissingArgError(missing path after %qs)
93 -include-directory-after=
94 C ObjC C++ ObjC++ Joined Alias(idirafter) MissingArgError(missing path after %qs)
97 C ObjC C++ ObjC++ Separate Alias(iprefix)
100 C ObjC C++ ObjC++ JoinedOrMissing Alias(iprefix)
103 C ObjC C++ ObjC++ Separate Alias(iwithprefix)
105 -include-with-prefix=
106 C ObjC C++ ObjC++ JoinedOrMissing Alias(iwithprefix)
108 -include-with-prefix-after
109 C ObjC C++ ObjC++ Separate Alias(iwithprefix)
111 -include-with-prefix-after=
112 C ObjC C++ ObjC++ JoinedOrMissing Alias(iwithprefix)
114 -include-with-prefix-before
115 C ObjC C++ ObjC++ Separate Alias(iwithprefixbefore)
117 -include-with-prefix-before=
118 C ObjC C++ ObjC++ JoinedOrMissing Alias(iwithprefixbefore)
121 Driver Alias(no-integrated-cpp)
124 C ObjC C++ ObjC++ Alias(P)
126 -no-standard-includes
127 C ObjC C++ ObjC++ Alias(nostdinc)
130 C ObjC C++ ObjC++ Alias(w)
133 C ObjC C++ ObjC++ Separate Alias(o)
136 C ObjC C++ ObjC++ Joined Alias(o)
139 C ObjC C++ ObjC++ Joined Separate
142 C ObjC C++ ObjC++ Alias(pedantic)
145 C ObjC C++ ObjC++ Undocumented Alias(E)
147 -print-missing-file-dependencies
148 C ObjC C++ ObjC++ Alias(MG)
151 C ObjC C++ ObjC++ Alias(H)
154 Driver Alias(traditional)
157 C ObjC C++ ObjC++ Alias(traditional-cpp)
160 C ObjC C++ ObjC++ Alias(trigraphs)
163 C ObjC C++ ObjC++ Separate Alias(U) MissingArgError(macro name missing after %qs)
166 C ObjC C++ ObjC++ Joined Alias(U) MissingArgError(macro name missing after %qs)
169 C ObjC C++ ObjC++ Alias(MM)
172 Common C ObjC C++ ObjC++ Alias(v)
175 C ObjC C++ ObjC++ NoDriverArg Separate Alias(MD) MissingArgError(missing filename after %qs)
177 -write-user-dependencies
178 C ObjC C++ ObjC++ NoDriverArg Separate Alias(MMD) MissingArgError(missing filename after %qs)
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>
186 Do not discard comments
190 Do not discard comments in macro expansions
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
197 C ObjC C++ ObjC++ Undocumented Var(flag_preprocess_only)
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
205 Print the name of header files as they are used
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
213 Generate make dependencies
216 C ObjC C++ ObjC++ NoDriverArg Separate MissingArgError(missing filename after %qs)
217 Generate make dependencies and compile
220 C ObjC C++ ObjC++ Joined Separate MissingArgError(missing filename after %qs)
221 -MF <file> Write dependency output to the given file
225 Treat missing header files as generated files
229 Like -M but ignore system header files
232 C ObjC C++ ObjC++ NoDriverArg Separate MissingArgError(missing filename after %qs)
233 Like -MD but ignore system header files
237 Generate phony targets for all headers
240 C ObjC C++ ObjC++ Joined Separate MissingArgError(missing makefile target after %qs)
241 -MQ <target> Add a MAKE-quoted target
244 C ObjC C++ ObjC++ Joined Separate MissingArgError(missing makefile target after %qs)
245 -MT <target> Add an unquoted target
249 Do not generate #line directives
252 C ObjC C++ ObjC++ Joined Separate MissingArgError(macro name missing after %qs)
253 -U<macro> Undefine <macro>
256 C ObjC C++ ObjC++ LTO Var(warn_abi) Warning
257 Warn about things that will change when compiling with an ABI-compliant compiler
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
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
268 C ObjC C++ ObjC++ LTO Var(warn_psabi) Init(1) Undocumented LangEnabledBy(C ObjC C++ ObjC++,Wabi)
271 C ObjC C++ ObjC++ Var(warn_address) Warning LangEnabledBy(C ObjC C++ ObjC++,Wall)
272 Warn about suspicious uses of memory addresses
275 C ObjC C++ ObjC++ Warning
276 Enable most warning messages
279 LangEnabledBy(C ObjC C++ ObjC++,Wall)
283 ObjC ObjC++ Var(warn_assign_intercept) Warning
284 Warn whenever an Objective-C assignment is being intercepted by the garbage collector
287 C ObjC Var(warn_bad_function_cast) Warning
288 Warn about casting functions to incompatible types
291 C ObjC C++ ObjC++ Var(warn_bool_compare) Warning LangEnabledBy(C ObjC C++ ObjC++,Wall)
292 Warn about boolean expression compared with an integer value different from true/false
294 Wbuiltin-macro-redefined
295 C ObjC C++ ObjC++ CPP(warn_builtin_macro_redefined) CppReason(CPP_W_BUILTIN_MACRO_REDEFINED) Var(cpp_warn_builtin_macro_redefined) Init(1) Warning
296 Warn when a built-in preprocessor macro is undefined or redefined
299 C ObjC CPP(cpp_warn_c90_c99_compat) CppReason(CPP_W_C90_C99_COMPAT) Var(warn_c90_c99_compat) Init(-1) Warning
300 Warn about features not present in ISO C90, but present in ISO C99
303 C ObjC Var(warn_c99_c11_compat) Init(-1) Warning
304 Warn about features not present in ISO C99, but present in ISO C11
307 C ObjC Var(warn_cxx_compat) CPP(warn_cxx_operator_names) CppReason(CPP_W_CXX_OPERATOR_NAMES) Init(0) Warning
308 Warn about C constructs that are not in the common subset of C and C++
311 C++ ObjC++ Var(warn_cxx0x_compat) Warning LangEnabledBy(C++ ObjC++,Wall)
312 Deprecated in favor of -Wc++11-compat
315 C++ ObjC++ Warning Alias(Wc++0x-compat)
316 Warn about C++ constructs whose meaning differs between ISO C++ 1998 and ISO C++ 2011
319 C ObjC C++ ObjC++ Var(warn_cast_qual) Warning
320 Warn about casts which discard qualifiers
323 C ObjC C++ ObjC++ Var(warn_char_subscripts) Warning LangEnabledBy(C ObjC C++ ObjC++,Wall)
324 Warn about subscripts whose type is \"char\"
327 C ObjC C++ ObjC++ Var(warn_clobbered) Warning EnabledBy(Wextra)
328 Warn about variables that might be changed by \"longjmp\" or \"vfork\"
331 C ObjC C++ ObjC++ CPP(warn_comments) CppReason(CPP_W_COMMENTS) Var(cpp_warn_comment) Init(0) Warning LangEnabledBy(C ObjC C++ ObjC++,Wall)
332 Warn about possibly nested block comments, and C++ comments spanning more than one physical line
335 C ObjC C++ ObjC++ Warning Alias(Wcomment)
336 Synonym for -Wcomment
338 Wconditionally-supported
339 C++ ObjC++ Var(warn_conditionally_supported) Warning
340 Warn for conditionally-supported constructs
343 C ObjC C++ ObjC++ Var(warn_conversion) Warning
344 Warn for implicit type conversions that may change a value
347 C++ ObjC++ Var(warn_conversion_null) Init(1) Warning
348 Warn for converting NULL from/to a non-pointer type
351 C ObjC C++ ObjC++ CppReason(CPP_W_WARNING_DIRECTIVE)
352 ; Documented in common.opt
355 C++ ObjC++ Var(warn_ctor_dtor_privacy) Warning
356 Warn when all constructors and destructors are private
359 C ObjC C++ ObjC++ CPP(warn_date_time) CppReason(CPP_W_DATE_TIME) Var(cpp_warn_date_time) Init(0) Warning
360 Warn about __TIME__, __DATE__ and __TIMESTAMP__ usage
362 Wdeclaration-after-statement
363 C ObjC Var(warn_declaration_after_statement) Init(-1) Warning
364 Warn when a declaration is found after a statement
367 C++ ObjC++ Var(warn_delete_incomplete) Init(1) Warning
368 Warn when deleting a pointer to incomplete type
370 Wdelete-non-virtual-dtor
371 C++ ObjC++ Var(warn_delnonvdtor) Warning LangEnabledBy(C++ ObjC++,Wall)
372 Warn about deleting polymorphic objects with non-virtual destructors
374 Wdelete-non-virtual-dtor
375 LangEnabledBy(C++ ObjC++,Weffc++)
379 C C++ ObjC ObjC++ CPP(cpp_warn_deprecated) CppReason(CPP_W_DEPRECATED) Var(warn_deprecated) Init(1) Warning
380 Warn if a deprecated compiler feature, class, method, or field is used
383 C ObjC Var(warn_designated_init) Init(1) Warning
384 Warn about positional initialization of structs requiring designated initializers
386 Wdiscarded-qualifiers
387 C ObjC Var(warn_discarded_qualifiers) Init(1) Warning
388 Warn if type qualifiers on pointers are discarded
391 C ObjC C++ ObjC++ Var(warn_div_by_zero) Init(1) Warning
392 Warn about compile-time integer division by zero
395 C++ ObjC++ Var(warn_ecpp) Warning
396 Warn about violations of Effective C++ style rules
399 C ObjC C++ ObjC++ Var(warn_empty_body) Warning EnabledBy(Wextra)
400 Warn about an empty body in an if or else statement
403 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)
404 Warn about stray tokens after #elif and #endif
407 C ObjC C++ ObjC++ Var(warn_enum_compare) Init(-1) Warning LangEnabledBy(C ObjC,Wall)
408 Warn about comparison of different enum types
411 LangEnabledBy(C ObjC,Wc++-compat)
416 ; Documented in common.opt
418 Werror-implicit-function-declaration
419 C ObjC RejectNegative Warning Alias(Werror=, implicit-function-declaration)
420 This switch is deprecated; use -Werror=implicit-function-declaration instead
423 C ObjC C++ ObjC++ Var(warn_float_conversion) LangEnabledBy(C ObjC C++ ObjC++,Wconversion)
424 Warn for implicit type conversions that cause loss of floating point precision
427 C ObjC C++ ObjC++ Var(warn_float_equal) Warning
428 Warn if testing floating point numbers for equality
431 C ObjC C++ ObjC++ Warning Alias(Wformat=, 1, 0)
432 Warn about printf/scanf/strftime/strfmon format string anomalies
435 C ObjC C++ ObjC++ Var(warn_format_contains_nul) Warning LangEnabledBy(C ObjC C++ ObjC++,Wformat=, warn_format >= 1, 0)
436 Warn about format strings that contain NUL bytes
439 C ObjC C++ ObjC++ Var(warn_format_extra_args) Warning LangEnabledBy(C ObjC C++ ObjC++,Wformat=, warn_format >= 1, 0)
440 Warn if passing too many arguments to a function for its format string
443 C ObjC C++ ObjC++ Var(warn_format_nonliteral) Warning LangEnabledBy(C ObjC C++ ObjC++,Wformat=, warn_format >= 2, 0)
444 Warn about format strings that are not literals
447 C ObjC C++ ObjC++ Var(warn_format_security) Warning LangEnabledBy(C ObjC C++ ObjC++,Wformat=, warn_format >= 2, 0)
448 Warn about possible security problems with format functions
451 C ObjC C++ ObjC++ Var(warn_format_signedness) Warning LangEnabledBy(C ObjC C++ ObjC++,Wformat=, warn_format >= 2, 0)
452 Warn about sign differences with format functions
455 C ObjC C++ ObjC++ Var(warn_format_y2k) Warning LangEnabledBy(C ObjC C++ ObjC++,Wformat=,warn_format >= 2, 0)
456 Warn about strftime formats yielding 2-digit years
459 C ObjC C++ ObjC++ Var(warn_format_zero_length) Warning LangEnabledBy(C ObjC C++ ObjC++,Wformat=,warn_format >= 1, 0)
460 Warn about zero-length formats
463 C ObjC C++ ObjC++ Joined RejectNegative UInteger Var(warn_format) Warning LangEnabledBy(C ObjC C++ ObjC++,Wall, 1, 0)
464 Warn about printf/scanf/strftime/strfmon format string anomalies
467 C C++ Var(warn_ignored_qualifiers) Warning EnabledBy(Wextra)
468 Warn whenever type qualifiers are ignored.
470 Wincompatible-pointer-types
471 C ObjC Var(warn_incompatible_pointer_types) Init(1) Warning
472 Warn when there is a conversion between pointers that have incompatible types
475 C ObjC C++ ObjC++ Var(warn_init_self) Warning LangEnabledBy(C++ ObjC++,Wall)
476 Warn about variables which are initialized to themselves
479 C ObjC Var(warn_implicit) Warning LangEnabledBy(C ObjC,Wall)
480 Warn about implicit declarations
483 C ObjC C++ ObjC++ Var(warn_double_promotion) Warning
484 Warn about implicit conversions from \"float\" to \"double\"
486 Wimplicit-function-declaration
487 C ObjC Var(warn_implicit_function_declaration) Init(-1) Warning LangEnabledBy(C ObjC,Wimplicit)
488 Warn about implicit function declarations
491 C ObjC Var(warn_implicit_int) Init(-1) Warning LangEnabledBy(C ObjC,Wimplicit)
492 Warn when a declaration does not specify a type
495 C ObjC C++ ObjC++ Undocumented Ignore
497 Winherited-variadic-ctor
498 C++ ObjC++ Var(warn_inh_var_ctor) Init(1) Warning
499 Warn about C++11 inheriting constructors when the base has a variadic constructor
502 C ObjC Var(warn_int_conversion) Init(1) Warning
503 Warn about incompatible integer to pointer and pointer to integer conversions
506 C ObjC C++ ObjC++ Var(warn_int_to_pointer_cast) Init(1) Warning
507 Warn when there is a cast to a pointer from an integer of a different size
510 C++ ObjC++ Var(warn_invalid_offsetof) Init(1) Warning
511 Warn about invalid uses of the \"offsetof\" macro
514 C ObjC C++ ObjC++ CPP(warn_invalid_pch) CppReason(CPP_W_INVALID_PCH) Var(cpp_warn_invalid_pch) Init(0) Warning
515 Warn about PCH files that are found but not used
518 C ObjC Var(warn_jump_misses_init) Warning LangEnabledby(C ObjC,Wc++-compat)
519 Warn when a jump misses a variable initialization
522 C++ ObjC++ CPP(warn_literal_suffix) CppReason(CPP_W_LITERAL_SUFFIX) Var(cpp_warn_literal_suffix) Init(1) Warning
523 Warn when a string or character literal is followed by a ud-suffix which does not begin with an underscore.
526 C ObjC C++ ObjC++ Var(warn_logical_op) Init(0) Warning
527 Warn when a logical operator is suspiciously always evaluating to true or false
529 Wlogical-not-parentheses
530 C ObjC C++ ObjC++ Var(warn_logical_not_paren) Warning LangEnabledBy(C ObjC C++ ObjC++,Wall)
531 Warn when logical not is used on the left hand side operand of a comparison
534 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)
535 Do not warn about using \"long long\" when -pedantic
538 C ObjC C++ ObjC++ Var(warn_main) Init(-1) Warning LangEnabledBy(C ObjC,Wall, 2, 0)
539 Warn about suspicious declarations of \"main\"
542 LangEnabledBy(C ObjC C++ ObjC++,Wpedantic, 2, 0)
545 Wmemset-transposed-args
546 C ObjC C++ ObjC++ Var(warn_memset_transposed_args) Warning LangEnabledBy(C ObjC C++ ObjC++,Wall)
547 Warn about suspicious calls to memset where the third argument is constant literal zero and the second is not
550 C ObjC C++ ObjC++ Var(warn_missing_braces) Warning LangEnabledBy(C ObjC,Wall)
551 Warn about possibly missing braces around initializers
553 Wmissing-declarations
554 C ObjC C++ ObjC++ Var(warn_missing_declarations) Warning
555 Warn about global functions without previous declarations
557 Wmissing-field-initializers
558 C ObjC C++ ObjC++ Var(warn_missing_field_initializers) Warning EnabledBy(Wextra)
559 Warn about missing fields in struct initializers
561 Wsizeof-pointer-memaccess
562 C ObjC C++ ObjC++ Var(warn_sizeof_pointer_memaccess) Warning LangEnabledBy(C ObjC C++ ObjC++,Wall)
563 Warn about suspicious length parameters to certain string functions if the argument uses sizeof
565 Wsizeof-array-argument
566 C ObjC C++ ObjC++ Var(warn_sizeof_array_argument) Warning Init(1)
567 Warn when sizeof is applied on a parameter declared as an array
569 Wsuggest-attribute=format
570 C ObjC C++ ObjC++ Var(warn_suggest_attribute_format) Warning
571 Warn about functions which might be candidates for format attributes
574 C ObjC C++ ObjC++ Var(warn_switch) Warning LangEnabledBy(C ObjC C++ ObjC++,Wall)
575 Warn about enumerated switches, with no default, missing a case
578 C ObjC C++ ObjC++ Var(warn_switch_default) Warning
579 Warn about enumerated switches missing a \"default:\" statement
582 C ObjC C++ ObjC++ Var(warn_switch_enum) Warning
583 Warn about all enumerated switches missing a specific case
586 C ObjC C++ ObjC++ Var(warn_switch_bool) Warning Init(1)
587 Warn about switches with boolean controlling expression
589 Wmissing-format-attribute
590 C ObjC C++ ObjC++ Alias(Wsuggest-attribute=format)
593 Wmissing-include-dirs
594 C ObjC C++ ObjC++ CPP(warn_missing_include_dirs) CppReason(CPP_W_MISSING_INCLUDE_DIRS) Var(cpp_warn_missing_include_dirs) Init(0) Warning
595 Warn about user-specified include directories that do not exist
597 Wmissing-parameter-type
598 C ObjC Var(warn_missing_parameter_type) Warning EnabledBy(Wextra)
599 Warn about function parameters declared without a type specifier in K&R-style functions
602 C ObjC Var(warn_missing_prototypes) Warning
603 Warn about global functions without prototypes
606 C ObjC C++ ObjC++ Ignore Warn(switch %qs is no longer supported)
609 C ObjC C++ ObjC++ CPP(warn_multichar) CppReason(CPP_W_MULTICHAR) Var(cpp_warn_multichar) Init(0) Warning
610 Warn about use of multi-character character constants
613 C ObjC C++ ObjC++ Warning Var(warn_narrowing) Init(-1) LangEnabledBy(C++ ObjC++,Wall)
614 Warn about narrowing conversions within { } that are ill-formed in C++11
617 C ObjC C++ ObjC++ LangEnabledBy(C++ ObjC++,Wc++0x-compat)
621 C ObjC Var(warn_nested_externs) Warning
622 Warn about \"extern\" declarations not at file scope
625 C++ ObjC++ Var(warn_noexcept) Warning
626 Warn when a noexcept expression evaluates to false even though the expression can't actually throw
629 C++ ObjC++ Var(warn_nontemplate_friend) Init(1) Warning
630 Warn when non-templatized friend functions are declared within a template
633 C++ ObjC++ Var(warn_nonvdtor) Warning LangEnabledBy(C++ ObjC++,Weffc++)
634 Warn about non-virtual destructors
637 C ObjC C++ ObjC++ Var(warn_nonnull) Warning LangEnabledBy(C ObjC C++ ObjC++,Wformat=,warn_format >= 1,0)
638 Warn about NULL being passed to argument slots marked as requiring non-NULL
641 C ObjC C++ ObjC++ LangEnabledBy(C ObjC C++ ObjC++,Wall)
645 C ObjC C++ ObjC++ Alias(Wnormalized=,nfc,none)
649 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)
650 -Wnormalized=<none|id|nfc|nfkc> Warn about non-normalised Unicode strings
652 ; Required for these enum values.
657 Name(cpp_normalize_level) Type(int) UnknownError(argument %qs to %<-Wnormalized%> not recognized)
660 Enum(cpp_normalize_level) String(none) Value(normalized_none)
663 Enum(cpp_normalize_level) String(nfkc) Value(normalized_KC)
666 Enum(cpp_normalize_level) String(id) Value(normalized_identifier_C)
669 Enum(cpp_normalize_level) String(nfc) Value(normalized_C)
672 C++ ObjC++ Var(warn_old_style_cast) Warning
673 Warn if a C-style cast is used in a program
675 Wold-style-declaration
676 C ObjC Var(warn_old_style_declaration) Warning EnabledBy(Wextra)
677 Warn for obsolescent usage in a declaration
679 Wold-style-definition
680 C ObjC Var(warn_old_style_definition) Warning
681 Warn if an old-style parameter definition is used
684 C C++ Var(warn_openmp_simd) Warning LangEnabledBy(C C++,Wall)
685 Warn if a simd directive is overridden by the vectorizer cost model
688 C ObjC C++ ObjC++ Var(warn_overlength_strings) Warning LangEnabledBy(C ObjC C++ ObjC++,Wpedantic)
689 Warn if a string is longer than the maximum portable length specified by the standard
692 C++ ObjC++ Var(warn_overloaded_virtual) Warning
693 Warn about overloaded virtual function names
696 C ObjC Var(warn_override_init) Warning EnabledBy(Wextra)
697 Warn about overriding initializers without side effects
699 Wpacked-bitfield-compat
700 C ObjC C++ ObjC++ Var(warn_packed_bitfield_compat) Init(-1) Warning
701 Warn about packed bit-fields whose offset changed in GCC 4.4
704 C ObjC C++ ObjC++ Var(warn_parentheses) Warning LangEnabledBy(C ObjC C++ ObjC++,Wall)
705 Warn about possibly missing parentheses
708 C ObjC C++ ObjC++ CPP(cpp_pedantic) CppReason(CPP_W_PEDANTIC) Warning
709 ; Documented in common.opt
712 C++ ObjC++ Var(warn_pmf2ptr) Init(1) Warning
713 Warn when converting the type of pointers to member functions
716 C ObjC C++ ObjC++ Var(warn_pointer_arith) Warning LangEnabledBy(C ObjC C++ ObjC++,Wpedantic)
717 Warn about function pointer arithmetic
720 C ObjC Var(warn_pointer_sign) Warning LangEnabledBy(C ObjC,Wall)
721 Warn when a pointer differs in signedness in an assignment
724 C ObjC LangEnabledBy(C ObjC,Wpedantic)
728 C ObjC Var(warn_pointer_to_int_cast) Init(1) Warning
729 Warn when a pointer is cast to an integer of a different size
732 C ObjC C++ ObjC++ Var(warn_pragmas) Init(1) Warning
733 Warn about misuses of pragmas
735 Wproperty-assign-default
736 ObjC ObjC++ Var(warn_property_assign_default) Init(1) Warning
737 Warn if a property for an Objective-C object has no assign semantics specified
740 ObjC ObjC++ Var(warn_protocol) Init(1) Warning
741 Warn if inherited methods are unimplemented
744 C ObjC C++ ObjC++ Var(warn_redundant_decls) Warning
745 Warn about multiple declarations of the same object
748 C++ ObjC++ Var(warn_reorder) Warning LangEnabledBy(C++ ObjC++,Wall)
749 Warn when the compiler reorders code
752 C ObjC C++ ObjC++ Var(warn_return_type) Warning LangEnabledBy(C ObjC C++ ObjC++,Wall)
753 Warn whenever a function's return type defaults to \"int\" (C), or about inconsistent return types (C++)
756 ObjC ObjC++ Var(warn_selector) Warning
757 Warn if a selector has multiple methods
760 ObjC ObjC++ Var(warn_shadow_ivar) EnabledBy(Wshadow) Init(1) Warning
761 Warn if a local declaration hides an instance variable
764 C ObjC C++ ObjC++ Var(warn_sequence_point) Warning LangEnabledBy(C ObjC C++ ObjC++,Wall)
765 Warn about possible violations of sequence point rules
768 C ObjC C++ ObjC++ Var(warn_sign_compare) Warning LangEnabledBy(C++ ObjC++,Wall)
769 Warn about signed-unsigned comparisons
772 C ObjC C++ ObjC++ EnabledBy(Wextra)
776 C ObjC C++ ObjC++ Var(warn_sign_conversion) LangEnabledBy(C ObjC,Wconversion)
777 Warn for implicit type conversions between signed and unsigned integers
780 C++ ObjC++ Var(warn_sign_promo) Warning
781 Warn when overload promotes from unsigned to signed
783 Wstrict-null-sentinel
784 C++ ObjC++ Warning Var(warn_strict_null_sentinel)
785 Warn about uncasted NULL used as sentinel
788 C ObjC Var(warn_strict_prototypes) Warning
789 Warn about unprototyped function declarations
792 C ObjC C++ ObjC++ LangEnabledBy(C ObjC C++ ObjC++,Wall, 3, 0)
796 C ObjC C++ ObjC++ LangEnabledBy(C ObjC C++ ObjC++,Wall, 1, 0)
799 Wstrict-selector-match
800 ObjC ObjC++ Var(warn_strict_selector_match) Warning
801 Warn if type signatures of candidate methods do not match exactly
804 C C++ Var(warn_sync_nand) Init(1) Warning
805 Warn when __sync_fetch_and_nand and __sync_nand_and_fetch built-in functions are used
808 C++ ObjC++ Var(warn_synth) Warning
809 Deprecated. This switch has no effect
812 C ObjC C++ ObjC++ Warning
813 ; Documented in common.opt
816 C ObjC CPP(cpp_warn_traditional) CppReason(CPP_W_TRADITIONAL) Var(warn_traditional) Init(0) Warning
817 Warn about features not present in traditional C
819 Wtraditional-conversion
820 C ObjC Var(warn_traditional_conversion) Warning
821 Warn of prototypes causing type conversions different from what would happen in the absence of prototype
824 C ObjC C++ ObjC++ CPP(warn_trigraphs) CppReason(CPP_W_TRIGRAPHS) Var(cpp_warn_trigraphs) Init(2) Warning LangEnabledBy(C ObjC C++ ObjC++,Wall)
825 Warn if trigraphs are encountered that might affect the meaning of the program
828 ObjC ObjC++ Var(warn_undeclared_selector) Warning
829 Warn about @selector()s without previously declared methods
832 C ObjC C++ ObjC++ CPP(warn_undef) CppReason(CPP_W_UNDEF) Var(cpp_warn_undef) Init(0) Warning
833 Warn if an undefined macro is used in an #if directive
836 C ObjC C++ ObjC++ LangEnabledBy(C ObjC C++ ObjC++,Wall)
840 C ObjC C++ ObjC++ LangEnabledBy(C ObjC C++ ObjC++,Wall)
844 C ObjC C++ ObjC++ Warning Var(warn_unknown_pragmas) LangEnabledBy(C ObjC C++ ObjC++,Wall, 1, 0)
845 Warn about unrecognized pragmas
847 Wunsuffixed-float-constants
848 C ObjC Var(warn_unsuffixed_float_constants) Warning
849 Warn about unsuffixed float constants
852 C ObjC C++ ObjC++ LangEnabledBy(C ObjC C++ ObjC++,Wall)
853 ; documented in common.opt
855 Wunused-local-typedefs
856 C ObjC C++ ObjC++ Var(warn_unused_local_typedefs) Warning EnabledBy(Wunused)
857 Warn when typedefs locally defined in a function are not used
860 C ObjC C++ ObjC++ CppReason(CPP_W_UNUSED_MACROS) Var(cpp_warn_unused_macros) Warning
861 Warn about macros defined in the main file that are not used
864 C ObjC C++ ObjC++ Var(warn_unused_result) Init(1) Warning
865 Warn if a caller of a function, marked with attribute warn_unused_result, does not use its return value
868 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)
869 Warn about using variadic macros
872 LangEnabledBy(C ObjC C++ ObjC++,Wtraditional)
876 C ObjC C++ ObjC++ Warning Var(warn_varargs) Init(1)
877 Warn about questionable usage of the macros used to retrieve variable arguments
880 C ObjC C++ ObjC++ Var(warn_vla) Init(-1) Warning
881 Warn if a variable length array is used
883 Wvolatile-register-var
884 C ObjC C++ ObjC++ Var(warn_volatile_register_var) Warning LangEnabledBy(C ObjC C++ ObjC++,Wall)
885 Warn when a register variable is declared volatile
888 C++ ObjC++ Var(warn_virtual_move_assign) Warning Init(1)
889 Warn if a virtual base has a non-trivial move assignment operator
892 C ObjC C++ ObjC++ Var(warn_write_strings) Warning
893 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.
895 Wzero-as-null-pointer-constant
896 C++ ObjC++ Var(warn_zero_as_null_pointer_constant) Warning
897 Warn when a literal '0' is used as null pointer
900 C++ ObjC++ Var(warn_useless_cast) Warning
901 Warn about useless casts
905 A synonym for -std=c89 (for C) or -std=c++98 (for C++)
908 C ObjC C++ ObjC++ Joined
909 ; Documented in common.opt. FIXME - what about -dI, -dD, -dN and -dD?
912 C++ ObjC++ Joined RejectNegative UInteger Var(flag_abi_compat_version) Init(-1)
913 The version of the C++ ABI used for -Wabi warnings and link compatibility aliases
916 C++ ObjC++ Var(flag_access_control) Init(1)
917 Enforce class member access control semantics
920 C ObjC C++ ObjC++ RejectNegative Joined Var(ada_specs_parent)
921 -fada-spec-parent=unit Dump Ada specs as child units of given parent
924 C++ ObjC++ Ignore Warn(switch %qs is no longer supported)
926 fallow-parameterless-variadic-functions
927 C ObjC Var(flag_allow_parameterless_variadic_functions)
928 Allow variadic functions without named parameter
930 falt-external-templates
931 C++ ObjC++ Ignore Warn(switch %qs is no longer supported)
935 C ObjC C++ ObjC++ Var(flag_no_asm, 0)
936 Recognize the \"asm\" keyword
938 ; Define extra predefined macros for use in libgcc.
940 C ObjC C++ ObjC++ Undocumented Var(flag_building_libgcc)
943 C ObjC C++ ObjC++ Var(flag_no_builtin, 0)
944 Recognize built-in functions
947 C ObjC C++ ObjC++ Joined
949 fcanonical-system-headers
951 Where shorter, use canonicalized paths to systems headers.
954 C ObjC C++ ObjC++ LTO Report Var(flag_cilkplus) Init(0)
959 Allow the arguments of the '?' operator to have different types
962 C++ ObjC++ Var(flag_conserve_space)
963 Does nothing. Preserved for backward compatibility.
965 fconstant-string-class=
966 ObjC ObjC++ Joined MissingArgError(no class name specified with %qs)
967 -fconst-string-class=<name> Use class <name> for constant strings
970 C++ ObjC++ Joined RejectNegative UInteger Var(max_constexpr_depth) Init(512)
971 -fconstexpr-depth=<number> Specify maximum constexpr recursion depth
975 Emit debug annotations during preprocessing
978 C++ ObjC++ Var(flag_deduce_init_list) Init(0)
979 -fdeduce-init-list enable deduction of std::initializer_list for a template type parameter from a brace-enclosed initializer-list
982 C++ ObjC++ Var(flag_declone_ctor_dtor) Init(-1)
983 Factor complex constructors and destructors to favor space over speed
987 Does nothing. Preserved for backward compatibility.
991 Preprocess directives only.
993 fdollars-in-identifiers
995 Permit '$' as an identifier character
998 C ObjC C++ ObjC++ RejectNegative Var(flag_dump_ada_spec)
999 Write all declarations as Ada code transitively
1002 C ObjC C++ ObjC++ RejectNegative Var(flag_dump_ada_spec_slim)
1003 Write all declarations as Ada code for the given file only
1006 C++ ObjC++ Var(flag_elide_constructors) Init(1)
1009 C++ ObjC++ Var(flag_enforce_eh_specs) Init(1)
1010 Generate code to check exception specifications
1013 C++ ObjC++ Ignore Warn(switch %qs is no longer supported)
1016 C ObjC C++ ObjC++ Joined RejectNegative
1017 -fexec-charset=<cset> Convert all strings and character constants to character set <cset>
1019 fextended-identifiers
1021 Permit universal character names (\\u and \\U) in identifiers
1024 C ObjC C++ ObjC++ Joined RejectNegative
1025 -finput-charset=<cset> Specify the default character set for source files
1028 C++ ObjC++ Var(flag_extern_tls_init) Init(-1)
1029 Support dynamic initialization of thread-local variables in a different translation unit
1032 C++ ObjC++ Ignore Warn(switch %qs is no longer supported)
1035 C++ ObjC++ Var(flag_new_for_scope) Init(1)
1036 Scope of for-init-statement variables is local to the loop
1040 Do not assume that standard C libraries and \"main\" exist
1043 C++ ObjC++ Var(flag_no_gnu_keywords, 0)
1044 Recognize GNU-defined keywords
1047 ObjC ObjC++ LTO Report RejectNegative Var(flag_next_runtime,0) Init(NEXT_OBJC_RUNTIME)
1048 Generate code for GNU runtime environment
1051 C ObjC Var(flag_gnu89_inline) Init(-1)
1052 Use traditional GNU semantics for inline functions
1055 C++ ObjC++ Ignore Warn(switch %qs is no longer supported)
1058 C++ ObjC++ Optimization Alias(fexceptions) Warn({-fhandle-exceptions has been renamed -fexceptions (and is now on by default)})
1061 C++ ObjC++ Ignore Warn(switch %qs is no longer supported)
1065 Assume normal C execution environment
1068 C++ ObjC++ Ignore Warn(switch %qs is no longer supported)
1072 C++ ObjC++ Var(flag_implement_inlines) Init(1)
1073 Export functions even if they can be inlined
1075 fimplicit-inline-templates
1076 C++ ObjC++ Var(flag_implicit_inline_templates) Init(1)
1077 Emit implicit instantiations of inline templates
1080 C++ ObjC++ Var(flag_implicit_templates) Init(1)
1081 Emit implicit instantiations of templates
1084 C++ ObjC++ Var(flag_friend_injection)
1085 Inject friend functions into enclosing namespace
1087 fkeep-inline-dllexport
1088 C C++ ObjC ObjC++ Var(flag_keep_inline_dllexport) Init(1) Report Condition(TARGET_DLLIMPORT_DECL_ATTRIBUTES)
1089 Don't emit dllexported inline functions unless needed
1092 C++ ObjC++ Ignore Warn(switch %qs is no longer supported)
1094 flax-vector-conversions
1095 C ObjC C++ ObjC++ Var(flag_lax_vector_conversions)
1096 Allow implicit conversions between vectors with differing numbers of subparts and/or differing element types.
1099 C ObjC C++ ObjC++ Var(flag_ms_extensions)
1100 Don't warn about uses of Microsoft extensions
1103 C ObjC C++ ObjC++ Ignore Warn(switch %qs is no longer supported)
1106 C ObjC C++ ObjC++ Ignore Warn(switch %qs is no longer supported)
1109 C ObjC C++ ObjC++ Ignore Warn(switch %qs is no longer supported)
1111 fname-mangling-version-
1112 C++ ObjC++ Joined Ignore Warn(switch %qs is no longer supported)
1115 C++ ObjC++ Ignore Warn(switch %qs is no longer supported)
1118 ObjC ObjC++ LTO Report RejectNegative Var(flag_next_runtime)
1119 Generate code for NeXT (Apple Mac OS X) runtime environment
1122 ObjC ObjC++ Var(flag_nil_receivers) Init(1)
1123 Assume that receivers of Objective-C messages may be nil
1126 ObjC ObjC++ Var(flag_local_ivars) Init(1)
1127 Allow access to instance variables as if they were local declarations within instance method implementations.
1130 ObjC ObjC++ Joined RejectNegative Enum(ivar_visibility) Var(default_ivar_visibility) Init(IVAR_VISIBILITY_PROTECTED)
1131 -fvisibility=[private|protected|public|package] Set the default symbol visibility
1134 Name(ivar_visibility) Type(enum ivar_visibility) UnknownError(unrecognized ivar visibility value %qs)
1137 Enum(ivar_visibility) String(private) Value(IVAR_VISIBILITY_PRIVATE)
1140 Enum(ivar_visibility) String(protected) Value(IVAR_VISIBILITY_PROTECTED)
1143 Enum(ivar_visibility) String(public) Value(IVAR_VISIBILITY_PUBLIC)
1146 Enum(ivar_visibility) String(package) Value(IVAR_VISIBILITY_PACKAGE)
1149 C++ ObjC++ Var(flag_no_nonansi_builtin, 0)
1152 C++ ObjC++ Ignore Warn(switch %qs is no longer supported)
1155 C++ ObjC++ Optimization Var(flag_nothrow_opt)
1156 Treat a throw() exception specification as noexcept to improve code size
1159 ObjC ObjC++ LTO Joined Report RejectNegative UInteger Var(flag_objc_abi)
1160 Specify which ABI to use for Objective-C family code and meta-data generation.
1162 ; Generate special '- .cxx_construct' and '- .cxx_destruct' methods
1163 ; to initialize any non-POD ivars in Objective-C++ classes.
1164 fobjc-call-cxx-cdtors
1165 ObjC++ Var(flag_objc_call_cxx_cdtors)
1166 Generate special Objective-C methods to initialize/destroy non-POD C++ ivars, if needed
1168 fobjc-direct-dispatch
1169 ObjC ObjC++ Var(flag_objc_direct_dispatch)
1170 Allow fast jumps to the message dispatcher
1172 ; Nonzero means that we will allow new ObjC exception syntax (@throw,
1173 ; @try, etc.) in source code.
1175 ObjC ObjC++ Var(flag_objc_exceptions)
1176 Enable Objective-C exception and synchronization syntax
1179 ObjC ObjC++ LTO Var(flag_objc_gc)
1180 Enable garbage collection (GC) in Objective-C/Objective-C++ programs
1183 ObjC ObjC++ Var(flag_objc_nilcheck,1)
1184 Enable inline checks for nil receivers with the NeXT runtime and ABI version 2.
1186 ; Nonzero means that we generate NeXT setjmp based exceptions.
1187 fobjc-sjlj-exceptions
1188 ObjC ObjC++ Var(flag_objc_sjlj_exceptions) Init(-1)
1189 Enable Objective-C setjmp exception handling runtime
1192 ObjC ObjC++ Var(flag_objc1_only)
1193 Conform to the Objective-C 1.0 language as implemented in GCC 4.0
1196 C ObjC C++ ObjC++ Var(flag_openmp)
1197 Enable OpenMP (implies -frecursive in Fortran)
1200 C ObjC C++ ObjC++ Var(flag_openmp_simd)
1201 Enable OpenMP's SIMD directives
1205 Recognize C++ keywords like \"compl\" and \"xor\"
1209 Does nothing. Preserved for backward compatibility.
1216 Look for and use PCH files even when preprocessing
1219 C++ ObjC++ Var(flag_permissive)
1220 Downgrade conformance errors to warnings
1223 C ObjC Var(flag_plan9_extensions)
1224 Enable Plan 9 language extensions
1228 Treat the input file as already preprocessed
1230 ftrack-macro-expansion
1231 C ObjC C++ ObjC++ JoinedOrMissing RejectNegative UInteger
1232 ; converted into ftrack-macro-expansion=
1234 ftrack-macro-expansion=
1235 C ObjC C++ ObjC++ JoinedOrMissing RejectNegative UInteger
1236 -ftrack-macro-expansion=<0|1|2> Track locations of tokens coming from macro expansion and display them in error messages
1239 C++ ObjC++ Var(flag_pretty_templates) Init(1)
1240 -fno-pretty-templates Do not pretty-print template specializations as the template signature followed by the arguments
1242 freplace-objc-classes
1243 ObjC ObjC++ LTO Var(flag_replace_objc_classes)
1244 Used in Fix-and-Continue mode to indicate that object files may be swapped in at runtime
1248 Enable automatic template instantiation
1251 C++ ObjC++ Optimization Var(flag_rtti) Init(1)
1252 Generate run time type descriptor information
1255 C ObjC C++ ObjC++ LTO Optimization Var(flag_short_double)
1256 Use the same size for double as for float
1259 C ObjC C++ ObjC++ LTO Optimization Var(flag_short_enums)
1260 Use the narrowest integer type possible for enumeration types
1263 C ObjC C++ ObjC++ LTO Optimization Var(flag_short_wchar)
1264 Force the underlying type for \"wchar_t\" to be \"unsigned short\"
1267 C ObjC C++ ObjC++ Var(flag_signed_bitfields) Init(1)
1268 When \"signed\" or \"unsigned\" is not given make the bitfield signed
1271 C ObjC C++ ObjC++ LTO Var(flag_signed_char)
1272 Make \"char\" signed by default
1275 C++ ObjC++ Ignore Warn(switch %qs is no longer supported)
1278 C++ ObjC++ Var(flag_detailed_statistics)
1279 Display statistics accumulated during compilation
1282 C++ ObjC++ Optimization Var(flag_strict_enums)
1283 Assume that values of enumeration type are always within the minimum range of that type
1286 C++ ObjC++ Ignore Warn(switch %qs is no longer supported)
1289 C ObjC C++ ObjC++ Joined RejectNegative UInteger
1290 -ftabstop=<number> Distance between tab stops for column reporting
1292 ftemplate-backtrace-limit=
1293 C++ ObjC++ Joined RejectNegative UInteger Var(template_backtrace_limit) Init(10)
1294 Set the maximum number of template instantiation notes for a single warning or error
1297 C++ ObjC++ Joined RejectNegative Undocumented Alias(ftemplate-depth=)
1300 C++ ObjC++ Joined RejectNegative UInteger
1301 -ftemplate-depth=<number> Specify maximum template instantiation depth
1304 C++ ObjC++ Ignore Warn(switch %qs is no longer supported)
1307 C++ ObjC++ Optimization Var(flag_threadsafe_statics) Init(1)
1308 -fno-threadsafe-statics Do not generate thread-safe code for initializing local statics
1311 C ObjC C++ ObjC++ Var(flag_signed_bitfields, 0)
1312 When \"signed\" or \"unsigned\" is not given make the bitfield unsigned
1315 C ObjC C++ ObjC++ LTO Var(flag_signed_char, 0)
1316 Make \"char\" unsigned by default
1319 C++ ObjC++ Var(flag_use_cxa_atexit) Init(DEFAULT_USE_CXA_ATEXIT)
1320 Use __cxa_atexit to register destructors
1322 fuse-cxa-get-exception-ptr
1323 C++ ObjC++ Var(flag_use_cxa_get_exception_ptr) Init(2)
1324 Use __cxa_get_exception_ptr in exception handling
1326 fvisibility-inlines-hidden
1328 Marks all inlined functions and methods as having hidden visibility
1330 fvisibility-ms-compat
1331 C++ ObjC++ Var(flag_visibility_ms_compat)
1332 Changes visibility to match Microsoft Visual Studio by default
1335 C++ ObjC++ Ignore Warn(switch %qs is no longer supported)
1339 C++ ObjC++ Ignore Warn(switch %qs is no longer supported)
1343 C++ ObjC++ Var(flag_weak) Init(1)
1344 Emit common-like symbols as weak symbols
1347 C ObjC C++ ObjC++ Joined RejectNegative
1348 -fwide-exec-charset=<cset> Convert all wide strings and character constants to character set <cset>
1351 C ObjC C++ ObjC++ Var(flag_working_directory) Init(-1)
1352 Generate a #line directive pointing at the current working directory
1355 C++ ObjC++ Ignore Warn(switch %qs is no longer supported)
1359 ObjC ObjC++ Var(flag_zero_link)
1360 Generate lazy class lookup (via objc_getClass()) for use in Zero-Link mode
1363 ObjC ObjC++ Var(flag_gen_declaration)
1364 Dump declarations to a .decl file
1366 femit-struct-debug-baseonly
1368 -femit-struct-debug-baseonly Aggressive reduced debug info for structs
1370 femit-struct-debug-reduced
1372 -femit-struct-debug-reduced Conservative reduced debug info for structs
1374 femit-struct-debug-detailed=
1375 C ObjC C++ ObjC++ Joined
1376 -femit-struct-debug-detailed=<spec-list> Detailed reduced debug info for structs
1378 fext-numeric-literals
1380 Interpret imaginary, fixed-point, or other gnu number suffix as the corresponding
1381 number literal rather than a user-defined number literal.
1384 C ObjC C++ ObjC++ Joined Separate MissingArgError(missing path after %qs)
1385 -idirafter <dir> Add <dir> to the end of the system include path
1388 C ObjC C++ ObjC++ Joined Separate MissingArgError(missing filename after %qs)
1389 -imacros <file> Accept definition of macros in <file>
1392 C ObjC C++ ObjC++ Joined Separate
1393 -imultilib <dir> Set <dir> to be the multilib include subdirectory
1396 C ObjC C++ ObjC++ Joined Separate MissingArgError(missing filename after %qs)
1397 -include <file> Include the contents of <file> before other files
1400 C ObjC C++ ObjC++ Joined Separate
1401 -iprefix <path> Specify <path> as a prefix for next two options
1404 C ObjC C++ ObjC++ Joined Separate MissingArgError(missing path after %qs)
1405 -isysroot <dir> Set <dir> to be the system root directory
1408 C ObjC C++ ObjC++ Joined Separate MissingArgError(missing path after %qs)
1409 -isystem <dir> Add <dir> to the start of the system include path
1412 C ObjC C++ ObjC++ Joined Separate MissingArgError(missing path after %qs)
1413 -iquote <dir> Add <dir> to the end of the quote include path
1416 C ObjC C++ ObjC++ Joined Separate
1417 -iwithprefix <dir> Add <dir> to the end of the system include path
1420 C ObjC C++ ObjC++ Joined Separate
1421 -iwithprefixbefore <dir> Add <dir> to the end of the main include path
1424 C Undocumented RejectDriver
1431 Do not search standard system include directories (those specified with -isystem will still be used)
1435 Do not search standard system include directories for C++
1438 C ObjC C++ ObjC++ Joined Separate
1439 ; Documented in common.opt
1442 C ObjC C++ ObjC++ Alias(Wpedantic)
1443 ; Documented in common.opt
1445 print-objc-runtime-info
1447 Generate C header of platform-specific features
1451 Remap file names when including files
1455 Conform to the ISO 1998 C++ standard revised by the 2003 technical corrigendum
1458 C++ ObjC++ Alias(std=c++98)
1459 Conform to the ISO 1998 C++ standard revised by the 2003 technical corrigendum
1463 Conform to the ISO 2011 C++ standard
1466 C++ ObjC++ Alias(std=c++11) Undocumented
1467 Deprecated in favor of -std=c++11
1470 C++ ObjC++ Alias(std=c++14) Undocumented
1471 Deprecated in favor of -std=c++14
1474 C++ ObjC++ Undocumented
1475 Conform to the ISO 2014 C++ standard (experimental and incomplete support)
1479 Conform to the ISO 2017(?) C++ draft standard (experimental and incomplete support)
1482 C++ ObjC++ Alias(std=c++1z) Undocumented
1486 Conform to the ISO 2011 C standard (experimental and incomplete support)
1489 C ObjC Alias(std=c11)
1490 Deprecated in favor of -std=c11
1493 C ObjC Alias(std=c90)
1494 Conform to the ISO 1990 C standard
1498 Conform to the ISO 1990 C standard
1502 Conform to the ISO 1999 C standard
1505 C ObjC Alias(std=c99)
1506 Deprecated in favor of -std=c99
1510 Conform to the ISO 1998 C++ standard revised by the 2003 technical
1511 corrigendum with GNU extensions
1514 C++ ObjC++ Alias(std=gnu++98)
1515 Conform to the ISO 1998 C++ standard revised by the 2003 technical
1516 corrigendum with GNU extensions
1520 Conform to the ISO 2011 C++ standard with GNU extensions (experimental and incomplete support)
1523 C++ ObjC++ Alias(std=gnu++11)
1524 Deprecated in favor of -std=gnu++11
1527 C++ ObjC++ Alias(std=gnu++14) Undocumented
1531 Conform to the ISO 2014 C++ standard with GNU extensions (experimental and incomplete support)
1535 Conform to the ISO 201z(7?) C++ draft standard with GNU extensions (experimental and incomplete support)
1538 C++ ObjC++ Alias(std=gnu++1z) Undocumented
1542 Conform to the ISO 2011 C standard with GNU extensions (experimental and incomplete support)
1545 C ObjC Alias(std=gnu11)
1546 Deprecated in favor of -std=gnu11
1549 C ObjC Alias(std=gnu90)
1550 Conform to the ISO 1990 C standard with GNU extensions
1554 Conform to the ISO 1990 C standard with GNU extensions
1558 Conform to the ISO 1999 C standard with GNU extensions
1561 C ObjC Alias(std=gnu99)
1562 Deprecated in favor of -std=gnu99
1565 C ObjC Alias(std=c90)
1566 Conform to the ISO 1990 C standard
1570 Conform to the ISO 1990 C standard as amended in 1994
1573 C ObjC Alias(std=c99)
1574 Conform to the ISO 1999 C standard
1577 C ObjC Alias(std=c99)
1578 Deprecated in favor of -std=iso9899:1999
1581 C ObjC Alias(std=c11)
1582 Conform to the ISO 2011 C standard (experimental and incomplete support)
1589 Enable traditional preprocessing
1593 -trigraphs Support ISO C trigraphs
1596 C ObjC C++ ObjC++ Var(flag_undef)
1597 Do not predefine system-specific and GCC-specific macros
1601 ; Documented in common.opt
1605 ; Documented in common.opt
1607 ; This comment is to ensure we retain the blank line above.