1 ; Options for the C, ObjC, C++ and ObjC++ front ends.
2 ; Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010,
3 ; 2011, 2012 Free Software Foundation, Inc.
5 ; This file is part of GCC.
7 ; GCC is free software; you can redistribute it and/or modify it under
8 ; the terms of the GNU General Public License as published by the Free
9 ; Software Foundation; either version 3, or (at your option) any later
12 ; GCC is distributed in the hope that it will be useful, but WITHOUT ANY
13 ; WARRANTY; without even the implied warranty of MERCHANTABILITY or
14 ; FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
17 ; You should have received a copy of the GNU General Public License
18 ; along with GCC; see the file COPYING3. If not see
19 ; <http://www.gnu.org/licenses/>.
21 ; See the GCC internals manual for a description of this file's format.
23 ; Please try to keep this file in ASCII collating order.
38 C ObjC C++ ObjC++ Warning Alias(Wall)
41 C ObjC C++ ObjC++ Alias(ansi)
44 C ObjC C++ ObjC++ Separate Alias(A) MissingArgError(assertion missing after %qs)
47 C ObjC C++ ObjC++ Joined Alias(A) MissingArgError(assertion missing after %qs)
50 C ObjC C++ ObjC++ Alias(C)
53 C ObjC C++ ObjC++ Alias(CC)
56 C ObjC C++ ObjC++ Separate Alias(D) MissingArgError(macro name missing after %qs)
59 C ObjC C++ ObjC++ Joined Alias(D) MissingArgError(macro name missing after %qs)
62 C ObjC C++ ObjC++ Alias(M)
65 C ObjC C++ ObjC++ Separate Alias(d)
68 C ObjC C++ ObjC++ Joined Alias(d)
71 C ObjC C++ ObjC++ Separate Alias(imacros) MissingArgError(missing filename after %qs)
74 C ObjC C++ ObjC++ Joined Alias(imacros) MissingArgError(missing filename after %qs)
77 C ObjC C++ ObjC++ Separate Alias(include) MissingArgError(missing filename after %qs)
80 C ObjC C++ ObjC++ Joined Alias(include) MissingArgError(missing filename after %qs)
83 C ObjC C++ ObjC++ Alias(I, -)
86 C ObjC C++ ObjC++ Separate Alias(I) MissingArgError(missing path after %qs)
89 C ObjC C++ ObjC++ Joined Alias(I) MissingArgError(missing path after %qs)
91 -include-directory-after
92 C ObjC C++ ObjC++ Separate Alias(idirafter) MissingArgError(missing path after %qs)
94 -include-directory-after=
95 C ObjC C++ ObjC++ Joined Alias(idirafter) MissingArgError(missing path after %qs)
98 C ObjC C++ ObjC++ Separate Alias(iprefix)
101 C ObjC C++ ObjC++ JoinedOrMissing Alias(iprefix)
104 C ObjC C++ ObjC++ Separate Alias(iwithprefix)
106 -include-with-prefix=
107 C ObjC C++ ObjC++ JoinedOrMissing Alias(iwithprefix)
109 -include-with-prefix-after
110 C ObjC C++ ObjC++ Separate Alias(iwithprefix)
112 -include-with-prefix-after=
113 C ObjC C++ ObjC++ JoinedOrMissing Alias(iwithprefix)
115 -include-with-prefix-before
116 C ObjC C++ ObjC++ Separate Alias(iwithprefixbefore)
118 -include-with-prefix-before=
119 C ObjC C++ ObjC++ JoinedOrMissing Alias(iwithprefixbefore)
122 Driver Alias(no-integrated-cpp)
125 C ObjC C++ ObjC++ Alias(P)
127 -no-standard-includes
128 C ObjC C++ ObjC++ Alias(nostdinc)
131 C ObjC C++ ObjC++ Alias(w)
134 C ObjC C++ ObjC++ Separate Alias(o)
137 C ObjC C++ ObjC++ Joined Alias(o)
140 C ObjC C++ ObjC++ Joined Separate
143 C ObjC C++ ObjC++ Alias(pedantic)
146 C ObjC C++ ObjC++ Alias(pedantic-errors)
149 C ObjC C++ ObjC++ Undocumented Alias(E)
151 -print-missing-file-dependencies
152 C ObjC C++ ObjC++ Alias(MG)
155 C ObjC C++ ObjC++ Alias(H)
158 Driver Alias(traditional)
161 C ObjC C++ ObjC++ Alias(traditional-cpp)
164 C ObjC C++ ObjC++ Alias(trigraphs)
167 C ObjC C++ ObjC++ Separate Alias(U) MissingArgError(macro name missing after %qs)
170 C ObjC C++ ObjC++ Joined Alias(U) MissingArgError(macro name missing after %qs)
173 C ObjC C++ ObjC++ Alias(MM)
176 Common C ObjC C++ ObjC++ Alias(v)
179 C ObjC C++ ObjC++ NoDriverArg Separate Alias(MD) MissingArgError(missing filename after %qs)
181 -write-user-dependencies
182 C ObjC C++ ObjC++ NoDriverArg Separate Alias(MMD) MissingArgError(missing filename after %qs)
185 C ObjC C++ ObjC++ Joined Separate MissingArgError(assertion missing after %qs)
186 -A<question>=<answer> Assert the <answer> to <question>. Putting '-' before <question> disables the <answer> to <question>
190 Do not discard comments
194 Do not discard comments in macro expansions
197 C ObjC C++ ObjC++ Joined Separate MissingArgError(macro name missing after %qs)
198 -D<macro>[=<val>] Define a <macro> with <val> as its value. If just <macro> is given, <val> is taken to be 1
201 C ObjC C++ ObjC++ Undocumented Var(flag_preprocess_only)
204 Driver C ObjC C++ ObjC++ Joined Separate MissingArgError(missing path after %qs)
205 -F <dir> Add <dir> to the end of the main framework include path
209 Print the name of header files as they are used
212 C ObjC C++ ObjC++ Joined Separate MissingArgError(missing path after %qs)
213 -I <dir> Add <dir> to the end of the main include path
217 Generate make dependencies
220 C ObjC C++ ObjC++ NoDriverArg Separate MissingArgError(missing filename after %qs)
221 Generate make dependencies and compile
224 C ObjC C++ ObjC++ Joined Separate MissingArgError(missing filename after %qs)
225 -MF <file> Write dependency output to the given file
229 Treat missing header files as generated files
233 Like -M but ignore system header files
236 C ObjC C++ ObjC++ NoDriverArg Separate MissingArgError(missing filename after %qs)
237 Like -MD but ignore system header files
241 Generate phony targets for all headers
244 C ObjC C++ ObjC++ Joined Separate MissingArgError(missing makefile target after %qs)
245 -MQ <target> Add a MAKE-quoted target
248 C ObjC C++ ObjC++ Joined Separate MissingArgError(missing makefile target after %qs)
249 -MT <target> Add an unquoted target
253 Do not generate #line directives
256 C ObjC C++ ObjC++ Joined Separate MissingArgError(macro name missing after %qs)
257 -U<macro> Undefine <macro>
260 C ObjC C++ ObjC++ LTO Var(warn_abi) Warning
261 Warn about things that will change when compiling with an ABI-compliant compiler
264 C ObjC C++ ObjC++ LTO Var(warn_psabi) Init(1) Undocumented
267 C ObjC C++ ObjC++ Var(warn_address) Warning
268 Warn about suspicious uses of memory addresses
271 C ObjC C++ ObjC++ Warning
272 Enable most warning messages
275 ObjC ObjC++ Var(warn_assign_intercept) Warning
276 Warn whenever an Objective-C assignment is being intercepted by the garbage collector
279 C ObjC Var(warn_bad_function_cast) Warning
280 Warn about casting functions to incompatible types
282 Wbuiltin-macro-redefined
283 C ObjC C++ ObjC++ Warning
284 Warn when a built-in preprocessor macro is undefined or redefined
287 C ObjC Var(warn_cxx_compat) Warning
288 Warn about C constructs that are not in the common subset of C and C++
291 C++ ObjC++ Var(warn_cxx0x_compat) Warning LangEnabledBy(C++ ObjC++,Wall)
292 Deprecated in favor of -Wc++11-compat
295 C++ ObjC++ Warning Alias(Wc++0x-compat)
296 Warn about C++ constructs whose meaning differs between ISO C++ 1998 and ISO C++ 2011
299 C ObjC C++ ObjC++ Var(warn_cast_qual) Warning
300 Warn about casts which discard qualifiers
303 C ObjC C++ ObjC++ Var(warn_char_subscripts) Warning
304 Warn about subscripts whose type is \"char\"
307 C ObjC C++ ObjC++ Var(warn_clobbered) Warning EnabledBy(Wextra)
308 Warn about variables that might be changed by \"longjmp\" or \"vfork\"
311 C ObjC C++ ObjC++ Warning
312 Warn about possibly nested block comments, and C++ comments spanning more than one physical line
315 C ObjC C++ ObjC++ Warning Alias(Wcomment)
316 Synonym for -Wcomment
319 C ObjC C++ ObjC++ Var(warn_conversion) Warning
320 Warn for implicit type conversions that may change a value
323 C++ ObjC++ Var(warn_conversion_null) Init(1) Warning
324 Warn for converting NULL from/to a non-pointer type
327 C ObjC C++ ObjC++ Var(warn_sign_conversion) Init(-1)
328 Warn for implicit type conversions between signed and unsigned integers
331 C++ ObjC++ Var(warn_ctor_dtor_privacy) Warning
332 Warn when all constructors and destructors are private
334 Wdeclaration-after-statement
335 C ObjC Var(warn_declaration_after_statement) Warning
336 Warn when a declaration is found after a statement
338 Wdelete-non-virtual-dtor
339 C++ ObjC++ Var(warn_delnonvdtor) Warning LangEnabledBy(C++ ObjC++,Wall)
340 Warn about deleting polymorphic objects with non-virtual destructors
343 C C++ ObjC ObjC++ Var(warn_deprecated) Init(1) Warning
344 Warn if a deprecated compiler feature, class, method, or field is used
347 C ObjC C++ ObjC++ Var(warn_div_by_zero) Init(1) Warning
348 Warn about compile-time integer division by zero
351 C++ ObjC++ Var(warn_ecpp) Warning
352 Warn about violations of Effective C++ style rules
355 C ObjC C++ ObjC++ Var(warn_empty_body) Warning EnabledBy(Wextra)
356 Warn about an empty body in an if or else statement
359 C ObjC C++ ObjC++ Warning
360 Warn about stray tokens after #elif and #endif
363 C ObjC C++ ObjC++ Var(warn_enum_compare) Init(-1) Warning
364 Warn about comparison of different enum types
368 ; Documented in common.opt
370 Werror-implicit-function-declaration
371 C ObjC RejectNegative Warning Alias(Werror=, implicit-function-declaration)
372 This switch is deprecated; use -Werror=implicit-function-declaration instead
375 C ObjC C++ ObjC++ Var(warn_float_equal) Warning
376 Warn if testing floating point numbers for equality
379 C ObjC C++ ObjC++ Warning
380 Warn about printf/scanf/strftime/strfmon format string anomalies
383 C ObjC C++ ObjC++ Var(warn_format_extra_args) Warning
384 Warn if passing too many arguments to a function for its format string
387 C ObjC C++ ObjC++ Var(warn_format_nonliteral) Warning
388 Warn about format strings that are not literals
391 C ObjC C++ ObjC++ Var(warn_format_contains_nul) Warning
392 Warn about format strings that contain NUL bytes
395 C ObjC C++ ObjC++ Var(warn_format_security) Warning
396 Warn about possible security problems with format functions
399 C ObjC C++ ObjC++ Var(warn_format_y2k) Warning
400 Warn about strftime formats yielding 2-digit years
403 C ObjC C++ ObjC++ Var(warn_format_zero_length) Warning
404 Warn about zero-length formats
407 C ObjC C++ ObjC++ Joined Warning
410 C C++ Var(warn_ignored_qualifiers) Warning EnabledBy(Wextra)
411 Warn whenever type qualifiers are ignored.
414 C ObjC C++ ObjC++ Var(warn_init_self) Warning
415 Warn about variables which are initialized to themselves
418 C ObjC Var(warn_implicit) Init(-1) Warning
419 Warn about implicit declarations
422 C ObjC C++ ObjC++ Var(warn_double_promotion) Warning
423 Warn about implicit conversions from \"float\" to \"double\"
425 Wimplicit-function-declaration
426 C ObjC Var(warn_implicit_function_declaration) Init(-1) Warning
427 Warn about implicit function declarations
430 C ObjC Var(warn_implicit_int) Init(-1) Warning
431 Warn when a declaration does not specify a type
434 C ObjC C++ ObjC++ Undocumented Ignore
437 C ObjC C++ ObjC++ Var(warn_int_to_pointer_cast) Init(1) Warning
438 Warn when there is a cast to a pointer from an integer of a different size
441 C++ ObjC++ Var(warn_invalid_offsetof) Init(1) Warning
442 Warn about invalid uses of the \"offsetof\" macro
445 C ObjC C++ ObjC++ Warning
446 Warn about PCH files that are found but not used
449 C ObjC Var(warn_jump_misses_init) Warning LangEnabledby(C ObjC,Wc++-compat)
450 Warn when a jump misses a variable initialization
454 Warn when a string or character literal is followed by a ud-suffix which does not begin with an underscore.
457 C ObjC C++ ObjC++ Var(warn_logical_op) Init(0) Warning
458 Warn when a logical operator is suspiciously always evaluating to true or false
461 C ObjC C++ ObjC++ Var(warn_long_long) Init(-1) Warning
462 Do not warn about using \"long long\" when -pedantic
465 C ObjC C++ ObjC++ Var(warn_main) Init(-1) Warning
466 Warn about suspicious declarations of \"main\"
469 C ObjC C++ ObjC++ Var(warn_missing_braces) Warning
470 Warn about possibly missing braces around initializers
472 Wmissing-declarations
473 C ObjC C++ ObjC++ Var(warn_missing_declarations) Warning
474 Warn about global functions without previous declarations
476 Wmissing-field-initializers
477 C ObjC C++ ObjC++ Var(warn_missing_field_initializers) Warning EnabledBy(Wextra)
478 Warn about missing fields in struct initializers
480 Wsuggest-attribute=format
481 C ObjC C++ ObjC++ Var(warn_suggest_attribute_format) Warning
482 Warn about functions which might be candidates for format attributes
484 Wmissing-format-attribute
485 C ObjC C++ ObjC++ Alias(Wsuggest-attribute=format)
488 Wmissing-include-dirs
489 C ObjC C++ ObjC++ Warning
490 Warn about user-specified include directories that do not exist
492 Wmissing-parameter-type
493 C ObjC Var(warn_missing_parameter_type) Warning EnabledBy(Wextra)
494 Warn about function parameters declared without a type specifier in K&R-style functions
497 C ObjC Var(warn_missing_prototypes) Warning
498 Warn about global functions without prototypes
501 C ObjC C++ ObjC++ Var(warn_mudflap) Init(1) Warning
502 Warn about constructs not instrumented by -fmudflap
505 C ObjC C++ ObjC++ Warning
506 Warn about use of multi-character character constants
509 C ObjC C++ ObjC++ Warning Var(warn_narrowing) Init(-1)
510 Warn about narrowing conversions within { } that are ill-formed in C++11
513 C ObjC Var(warn_nested_externs) Warning
514 Warn about \"extern\" declarations not at file scope
517 C++ ObjC++ Var(warn_noexcept) Warning
518 Warn when a noexcept expression evaluates to false even though the expression can't actually throw
521 C++ ObjC++ Var(warn_nontemplate_friend) Init(1) Warning
522 Warn when non-templatized friend functions are declared within a template
525 C++ ObjC++ Var(warn_nonvdtor) Warning
526 Warn about non-virtual destructors
529 C ObjC C++ ObjC++ Var(warn_nonnull) Warning
530 Warn about NULL being passed to argument slots marked as requiring non-NULL
533 C ObjC C++ ObjC++ Joined Warning
534 -Wnormalized=<id|nfc|nfkc> Warn about non-normalised Unicode strings
537 C++ ObjC++ Var(warn_old_style_cast) Warning
538 Warn if a C-style cast is used in a program
540 Wold-style-declaration
541 C ObjC Var(warn_old_style_declaration) Warning EnabledBy(Wextra)
542 Warn for obsolescent usage in a declaration
544 Wold-style-definition
545 C ObjC Var(warn_old_style_definition) Warning
546 Warn if an old-style parameter definition is used
549 C ObjC C++ ObjC++ Var(warn_overlength_strings) Init(-1) Warning
550 Warn if a string is longer than the maximum portable length specified by the standard
553 C++ ObjC++ Var(warn_overloaded_virtual) Warning
554 Warn about overloaded virtual function names
557 C ObjC Var(warn_override_init) Warning EnabledBy(Wextra)
558 Warn about overriding initializers without side effects
560 Wpacked-bitfield-compat
561 C ObjC C++ ObjC++ Var(warn_packed_bitfield_compat) Init(-1) Warning
562 Warn about packed bit-fields whose offset changed in GCC 4.4
565 C ObjC C++ ObjC++ Var(warn_parentheses) Warning
566 Warn about possibly missing parentheses
569 C ObjC C++ ObjC++ Warning
570 ; Documented in common.opt
573 C++ ObjC++ Var(warn_pmf2ptr) Init(1) Warning
574 Warn when converting the type of pointers to member functions
577 C ObjC C++ ObjC++ Var(warn_pointer_arith) Warning
578 Warn about function pointer arithmetic
581 C ObjC Var(warn_pointer_to_int_cast) Init(1) Warning
582 Warn when a pointer is cast to an integer of a different size
585 C ObjC C++ ObjC++ Var(warn_pragmas) Init(1) Warning
586 Warn about misuses of pragmas
588 Wproperty-assign-default
589 ObjC ObjC++ Var(warn_property_assign_default) Init(1) Warning
590 Warn if a property for an Objective-C object has no assign semantics specified
593 ObjC ObjC++ Var(warn_protocol) Init(1) Warning
594 Warn if inherited methods are unimplemented
597 C ObjC C++ ObjC++ Var(warn_redundant_decls) Warning
598 Warn about multiple declarations of the same object
601 C++ ObjC++ Var(warn_reorder) Warning LangEnabledBy(C++ ObjC++,Wall)
602 Warn when the compiler reorders code
605 C ObjC C++ ObjC++ Var(warn_return_type) Warning
606 Warn whenever a function's return type defaults to \"int\" (C), or about inconsistent return types (C++)
609 ObjC ObjC++ Var(warn_selector) Warning
610 Warn if a selector has multiple methods
613 C ObjC C++ ObjC++ Var(warn_sequence_point) Warning
614 Warn about possible violations of sequence point rules
617 C ObjC C++ ObjC++ Var(warn_sign_compare) Init(-1) Warning
618 Warn about signed-unsigned comparisons
621 C++ ObjC++ Var(warn_sign_promo) Warning
622 Warn when overload promotes from unsigned to signed
624 Wstrict-null-sentinel
625 C++ ObjC++ Warning Var(warn_strict_null_sentinel)
626 Warn about uncasted NULL used as sentinel
629 C ObjC Var(warn_strict_prototypes) Warning
630 Warn about unprototyped function declarations
632 Wstrict-selector-match
633 ObjC ObjC++ Var(warn_strict_selector_match) Warning
634 Warn if type signatures of candidate methods do not match exactly
637 C C++ Var(warn_sync_nand) Init(1) Warning
638 Warn when __sync_fetch_and_nand and __sync_nand_and_fetch built-in functions are used
641 C++ ObjC++ Var(warn_synth) Warning
642 Deprecated. This switch has no effect
645 C ObjC C++ ObjC++ Warning
646 ; Documented in common.opt
649 C ObjC Var(warn_traditional) Warning
650 Warn about features not present in traditional C
652 Wtraditional-conversion
653 C ObjC Var(warn_traditional_conversion) Warning
654 Warn of prototypes causing type conversions different from what would happen in the absence of prototype
657 C ObjC C++ ObjC++ Warning
658 Warn if trigraphs are encountered that might affect the meaning of the program
661 ObjC ObjC++ Var(warn_undeclared_selector) Warning
662 Warn about @selector()s without previously declared methods
665 C ObjC C++ ObjC++ Warning
666 Warn if an undefined macro is used in an #if directive
669 C ObjC C++ ObjC++ Warning
670 Warn about unrecognized pragmas
672 Wunsuffixed-float-constants
673 C ObjC Var(warn_unsuffixed_float_constants) Warning
674 Warn about unsuffixed float constants
676 Wunused-local-typedefs
677 C ObjC C++ ObjC++ Var(warn_unused_local_typedefs) Warning
678 Warn when typedefs locally defined in a function are not used
681 C ObjC C++ ObjC++ Warning
682 Warn about macros defined in the main file that are not used
685 C ObjC C++ ObjC++ Var(warn_unused_result) Init(1) Warning
686 Warn if a caller of a function, marked with attribute warn_unused_result, does not use its return value
689 C ObjC C++ ObjC++ Warning
690 Do not warn about using variadic macros when -pedantic
693 C ObjC C++ ObjC++ Warning Var(warn_varargs) Init(1)
694 Warn about questionable usage of the macros used to retrieve variable arguments
697 C ObjC C++ ObjC++ Var(warn_vla) Init(-1) Warning
698 Warn if a variable length array is used
700 Wvolatile-register-var
701 C ObjC C++ ObjC++ Var(warn_volatile_register_var) Warning
702 Warn when a register variable is declared volatile
705 C ObjC C++ ObjC++ Var(warn_write_strings) Warning
706 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.
709 C ObjC Var(warn_pointer_sign) Init(-1) Warning
710 Warn when a pointer differs in signedness in an assignment
712 Wzero-as-null-pointer-constant
713 C++ ObjC++ Var(warn_zero_as_null_pointer_constant) Warning
714 Warn when a literal '0' is used as null pointer
717 C++ ObjC++ Var(warn_useless_cast) Warning
718 Warn about useless casts
722 A synonym for -std=c89 (for C) or -std=c++98 (for C++)
725 C ObjC C++ ObjC++ Joined
726 ; Documented in common.opt. FIXME - what about -dI, -dD, -dN and -dD?
729 C++ ObjC++ Var(flag_access_control) Init(1)
730 Enforce class member access control semantics
733 C++ ObjC++ Ignore Warn(switch %qs is no longer supported)
735 fallow-parameterless-variadic-functions
736 C ObjC Var(flag_allow_parameterless_variadic_functions)
737 Allow variadic functions without named parameter
739 falt-external-templates
740 C++ ObjC++ Ignore Warn(switch %qs is no longer supported)
744 C ObjC C++ ObjC++ Var(flag_no_asm, 0)
745 Recognize the \"asm\" keyword
747 ; Define extra predefined macros for use in libgcc.
749 C ObjC C++ ObjC++ Undocumented Var(flag_building_libgcc)
752 C ObjC C++ ObjC++ Var(flag_no_builtin, 0)
753 Recognize built-in functions
756 C ObjC C++ ObjC++ Joined
759 C++ ObjC++ Var(flag_check_new)
760 Check the return value of new
764 Allow the arguments of the '?' operator to have different types
767 C++ ObjC++ Var(flag_conserve_space)
768 Reduce the size of object files
770 fconstant-string-class=
771 ObjC ObjC++ Joined MissingArgError(no class name specified with %qs)
772 -fconst-string-class=<name> Use class <name> for constant strings
775 C++ ObjC++ Joined RejectNegative UInteger Var(max_constexpr_depth) Init(512)
776 -fconstexpr-depth=<number> Specify maximum constexpr recursion depth
780 Emit debug annotations during preprocessing
783 C++ ObjC++ Var(flag_deduce_init_list) Init(0)
784 -fdeduce-init-list enable deduction of std::initializer_list for a template type parameter from a brace-enclosed initializer-list
788 Does nothing. Preserved for backward compatibility.
792 Preprocess directives only.
794 fdollars-in-identifiers
796 Permit '$' as an identifier character
799 C++ ObjC++ Var(flag_elide_constructors) Init(1)
802 C++ ObjC++ Var(flag_enforce_eh_specs) Init(1)
803 Generate code to check exception specifications
806 C++ ObjC++ Ignore Warn(switch %qs is no longer supported)
809 C ObjC C++ ObjC++ Joined RejectNegative
810 -fexec-charset=<cset> Convert all strings and character constants to character set <cset>
812 fextended-identifiers
814 Permit universal character names (\\u and \\U) in identifiers
817 C ObjC C++ ObjC++ Joined RejectNegative
818 -finput-charset=<cset> Specify the default character set for source files
822 C++ ObjC++ Ignore Warn(switch %qs is no longer supported)
825 C++ ObjC++ Var(flag_new_for_scope) Init(1)
826 Scope of for-init-statement variables is local to the loop
830 Do not assume that standard C libraries and \"main\" exist
833 C++ ObjC++ Var(flag_no_gnu_keywords, 0)
834 Recognize GNU-defined keywords
837 ObjC ObjC++ Report RejectNegative Var(flag_next_runtime,0) Init(NEXT_OBJC_RUNTIME)
838 Generate code for GNU runtime environment
841 C ObjC Var(flag_gnu89_inline) Init(-1)
842 Use traditional GNU semantics for inline functions
845 C++ ObjC++ Ignore Warn(switch %qs is no longer supported)
848 C++ ObjC++ Optimization Alias(fexceptions) Warn({-fhandle-exceptions has been renamed -fexceptions (and is now on by default)})
851 C++ ObjC++ Ignore Warn(switch %qs is no longer supported)
855 Assume normal C execution environment
858 C++ ObjC++ Ignore Warn(switch %qs is no longer supported)
862 C++ ObjC++ Var(flag_implement_inlines) Init(1)
863 Export functions even if they can be inlined
865 fimplicit-inline-templates
866 C++ ObjC++ Var(flag_implicit_inline_templates) Init(1)
867 Emit implicit instantiations of inline templates
870 C++ ObjC++ Var(flag_implicit_templates) Init(1)
871 Emit implicit instantiations of templates
874 C++ ObjC++ Var(flag_friend_injection)
875 Inject friend functions into enclosing namespace
877 fkeep-inline-dllexport
878 C C++ ObjC ObjC++ Var(flag_keep_inline_dllexport) Init(1) Report Condition(TARGET_DLLIMPORT_DECL_ATTRIBUTES)
879 Don't emit dllexported inline functions unless needed
882 C++ ObjC++ Ignore Warn(switch %qs is no longer supported)
884 flax-vector-conversions
885 C ObjC C++ ObjC++ Var(flag_lax_vector_conversions)
886 Allow implicit conversions between vectors with differing numbers of subparts and/or differing element types.
889 C ObjC C++ ObjC++ Var(flag_ms_extensions)
890 Don't warn about uses of Microsoft extensions
893 C ObjC C++ ObjC++ RejectNegative Report Var(flag_mudflap)
894 Add mudflap bounds-checking instrumentation for single-threaded program
897 C ObjC C++ ObjC++ RejectNegative Report Var(flag_mudflap,2)
898 Add mudflap bounds-checking instrumentation for multi-threaded program
901 C ObjC C++ ObjC++ RejectNegative Report Var(flag_mudflap_ignore_reads)
902 Ignore read operations when inserting mudflap instrumentation
904 fname-mangling-version-
905 C++ ObjC++ Joined Ignore Warn(switch %qs is no longer supported)
908 C++ ObjC++ Ignore Warn(switch %qs is no longer supported)
911 ObjC ObjC++ Report RejectNegative Var(flag_next_runtime)
912 Generate code for NeXT (Apple Mac OS X) runtime environment
915 ObjC ObjC++ Var(flag_nil_receivers) Init(1)
916 Assume that receivers of Objective-C messages may be nil
919 C++ ObjC++ Var(flag_no_nonansi_builtin, 0)
922 C++ ObjC++ Ignore Warn(switch %qs is no longer supported)
925 C++ ObjC++ Optimization Var(flag_nothrow_opt)
926 Treat a throw() exception specification as noexcept to improve code size
929 ObjC ObjC++ Joined Report RejectNegative UInteger Var(flag_objc_abi)
930 Specify which ABI to use for Objective-C family code and meta-data generation.
932 ; Generate special '- .cxx_construct' and '- .cxx_destruct' methods
933 ; to initialize any non-POD ivars in Objective-C++ classes.
934 fobjc-call-cxx-cdtors
935 ObjC++ Var(flag_objc_call_cxx_cdtors)
936 Generate special Objective-C methods to initialize/destroy non-POD C++ ivars, if needed
938 fobjc-direct-dispatch
939 ObjC ObjC++ Var(flag_objc_direct_dispatch)
940 Allow fast jumps to the message dispatcher
942 ; Nonzero means that we will allow new ObjC exception syntax (@throw,
943 ; @try, etc.) in source code.
945 ObjC ObjC++ Var(flag_objc_exceptions)
946 Enable Objective-C exception and synchronization syntax
949 ObjC ObjC++ Var(flag_objc_gc)
950 Enable garbage collection (GC) in Objective-C/Objective-C++ programs
953 ObjC ObjC++ Var(flag_objc_nilcheck,1)
954 Enable inline checks for nil receivers with the NeXT runtime and ABI version 2.
956 ; Nonzero means that we generate NeXT setjmp based exceptions.
957 fobjc-sjlj-exceptions
958 ObjC ObjC++ Var(flag_objc_sjlj_exceptions) Init(-1)
959 Enable Objective-C setjmp exception handling runtime
962 ObjC ObjC++ Var(flag_objc1_only)
963 Conform to the Objective-C 1.0 language as implemented in GCC 4.0
966 C ObjC C++ ObjC++ Var(flag_openmp)
967 Enable OpenMP (implies -frecursive in Fortran)
971 Recognize C++ keywords like \"compl\" and \"xor\"
975 Does nothing. Preserved for backward compatibility.
982 Look for and use PCH files even when preprocessing
985 C++ ObjC++ Var(flag_permissive)
986 Downgrade conformance errors to warnings
989 C ObjC Var(flag_plan9_extensions)
990 Enable Plan 9 language extensions
994 Treat the input file as already preprocessed
996 ftrack-macro-expansion
997 C ObjC C++ ObjC++ JoinedOrMissing RejectNegative UInteger
998 ; converted into ftrack-macro-expansion=
1000 ftrack-macro-expansion=
1001 C ObjC C++ ObjC++ JoinedOrMissing RejectNegative UInteger
1002 -ftrack-macro-expansion=<0|1|2> Track locations of tokens coming from macro expansion and display them in error messages
1005 C++ ObjC++ Var(flag_pretty_templates) Init(1)
1006 -fno-pretty-templates Do not pretty-print template specializations as the template signature followed by the arguments
1008 freplace-objc-classes
1009 ObjC ObjC++ Var(flag_replace_objc_classes)
1010 Used in Fix-and-Continue mode to indicate that object files may be swapped in at runtime
1014 Enable automatic template instantiation
1017 C++ ObjC++ Optimization Var(flag_rtti) Init(1)
1018 Generate run time type descriptor information
1021 C ObjC C++ ObjC++ Optimization Var(flag_short_double)
1022 Use the same size for double as for float
1025 C ObjC C++ ObjC++ Optimization Var(flag_short_enums)
1026 Use the narrowest integer type possible for enumeration types
1029 C ObjC C++ ObjC++ Optimization Var(flag_short_wchar)
1030 Force the underlying type for \"wchar_t\" to be \"unsigned short\"
1033 C ObjC C++ ObjC++ Var(flag_signed_bitfields) Init(1)
1034 When \"signed\" or \"unsigned\" is not given make the bitfield signed
1037 C ObjC C++ ObjC++ LTO Var(flag_signed_char)
1038 Make \"char\" signed by default
1041 C++ ObjC++ Ignore Warn(switch %qs is no longer supported)
1044 C++ ObjC++ Var(flag_detailed_statistics)
1045 Display statistics accumulated during compilation
1048 C++ ObjC++ Optimization Var(flag_strict_enums)
1049 Assume that values of enumeration type are always within the minimum range of that type
1052 C++ ObjC++ Ignore Warn(switch %qs is no longer supported)
1055 C ObjC C++ ObjC++ Joined RejectNegative UInteger
1056 -ftabstop=<number> Distance between tab stops for column reporting
1058 ftemplate-backtrace-limit=
1059 C++ ObjC++ Joined RejectNegative UInteger Var(template_backtrace_limit) Init(10)
1060 Set the maximum number of template instantiation notes for a single warning or error
1063 C++ ObjC++ Joined RejectNegative Undocumented Alias(ftemplate-depth=)
1066 C++ ObjC++ Joined RejectNegative UInteger
1067 -ftemplate-depth=<number> Specify maximum template instantiation depth
1070 C++ ObjC++ Ignore Warn(switch %qs is no longer supported)
1073 C++ ObjC++ Optimization Var(flag_threadsafe_statics) Init(1)
1074 -fno-threadsafe-statics Do not generate thread-safe code for initializing local statics
1077 C ObjC C++ ObjC++ Var(flag_signed_bitfields, 0)
1078 When \"signed\" or \"unsigned\" is not given make the bitfield unsigned
1081 C ObjC C++ ObjC++ LTO Var(flag_signed_char, 0)
1082 Make \"char\" unsigned by default
1085 C++ ObjC++ Var(flag_use_cxa_atexit) Init(DEFAULT_USE_CXA_ATEXIT)
1086 Use __cxa_atexit to register destructors
1088 fuse-cxa-get-exception-ptr
1089 C++ ObjC++ Var(flag_use_cxa_get_exception_ptr) Init(2)
1090 Use __cxa_get_exception_ptr in exception handling
1092 fvisibility-inlines-hidden
1094 Marks all inlined functions and methods as having hidden visibility
1096 fvisibility-ms-compat
1097 C++ ObjC++ Var(flag_visibility_ms_compat)
1098 Changes visibility to match Microsoft Visual Studio by default
1101 C++ ObjC++ Ignore Warn(switch %qs is no longer supported)
1105 C++ ObjC++ Ignore Warn(switch %qs is no longer supported)
1109 C++ ObjC++ Var(flag_weak) Init(1)
1110 Emit common-like symbols as weak symbols
1113 C ObjC C++ ObjC++ Joined RejectNegative
1114 -fwide-exec-charset=<cset> Convert all wide strings and character constants to character set <cset>
1117 C ObjC C++ ObjC++ Var(flag_working_directory) Init(-1)
1118 Generate a #line directive pointing at the current working directory
1121 C++ ObjC++ Ignore Warn(switch %qs is no longer supported)
1125 ObjC ObjC++ Var(flag_zero_link)
1126 Generate lazy class lookup (via objc_getClass()) for use in Zero-Link mode
1129 ObjC ObjC++ Var(flag_gen_declaration)
1130 Dump declarations to a .decl file
1132 femit-struct-debug-baseonly
1134 -femit-struct-debug-baseonly Aggressive reduced debug info for structs
1136 femit-struct-debug-reduced
1138 -femit-struct-debug-reduced Conservative reduced debug info for structs
1140 femit-struct-debug-detailed=
1141 C ObjC C++ ObjC++ Joined
1142 -femit-struct-debug-detailed=<spec-list> Detailed reduced debug info for structs
1145 C ObjC C++ ObjC++ Joined Separate MissingArgError(missing path after %qs)
1146 -idirafter <dir> Add <dir> to the end of the system include path
1149 C ObjC C++ ObjC++ Joined Separate MissingArgError(missing filename after %qs)
1150 -imacros <file> Accept definition of macros in <file>
1153 C ObjC C++ ObjC++ Joined Separate
1154 -imultilib <dir> Set <dir> to be the multilib include subdirectory
1157 C ObjC C++ ObjC++ Joined Separate MissingArgError(missing filename after %qs)
1158 -include <file> Include the contents of <file> before other files
1161 C ObjC C++ ObjC++ Joined Separate
1162 -iprefix <path> Specify <path> as a prefix for next two options
1165 C ObjC C++ ObjC++ Joined Separate MissingArgError(missing path after %qs)
1166 -isysroot <dir> Set <dir> to be the system root directory
1169 C ObjC C++ ObjC++ Joined Separate MissingArgError(missing path after %qs)
1170 -isystem <dir> Add <dir> to the start of the system include path
1173 C ObjC C++ ObjC++ Joined Separate MissingArgError(missing path after %qs)
1174 -iquote <dir> Add <dir> to the end of the quote include path
1177 C ObjC C++ ObjC++ Joined Separate
1178 -iwithprefix <dir> Add <dir> to the end of the system include path
1181 C ObjC C++ ObjC++ Joined Separate
1182 -iwithprefixbefore <dir> Add <dir> to the end of the main include path
1185 C Undocumented RejectDriver
1192 Do not search standard system include directories (those specified with -isystem will still be used)
1196 Do not search standard system include directories for C++
1199 C ObjC C++ ObjC++ Joined Separate
1200 ; Documented in common.opt
1203 C ObjC C++ ObjC++ Alias(Wpedantic)
1204 ; Documented in common.opt
1208 ; Documented in common.opt
1210 print-objc-runtime-info
1212 Generate C header of platform-specific features
1216 Remap file names when including files
1220 Conform to the ISO 1998 C++ standard revised by the 2003 technical corrigendum
1223 C++ ObjC++ Alias(std=c++98)
1224 Conform to the ISO 1998 C++ standard revised by the 2003 technical corrigendum
1228 Conform to the ISO 2011 C++ standard (experimental and incomplete support)
1231 C++ ObjC++ Alias(std=c++11)
1232 Deprecated in favor of -std=c++11
1236 Conform to the ISO 201y(7?) C++ draft standard (experimental and incomplete support)
1240 Conform to the ISO 2011 C standard (experimental and incomplete support)
1243 C ObjC Alias(std=c11)
1244 Deprecated in favor of -std=c11
1247 C ObjC Alias(std=c90)
1248 Conform to the ISO 1990 C standard
1252 Conform to the ISO 1990 C standard
1256 Conform to the ISO 1999 C standard
1259 C ObjC Alias(std=c99)
1260 Deprecated in favor of -std=c99
1264 Conform to the ISO 1998 C++ standard revised by the 2003 technical
1265 corrigendum with GNU extensions
1268 C++ ObjC++ Alias(std=gnu++98)
1269 Conform to the ISO 1998 C++ standard revised by the 2003 technical
1270 corrigendum with GNU extensions
1274 Conform to the ISO 2011 C++ standard with GNU extensions (experimental and incomplete support)
1277 C++ ObjC++ Alias(std=gnu++11)
1278 Deprecated in favor of -std=gnu++11
1282 Conform to the ISO 201y(7?) C++ draft standard with GNU extensions (experimental and incomplete support)
1286 Conform to the ISO 2011 C standard with GNU extensions (experimental and incomplete support)
1289 C ObjC Alias(std=gnu11)
1290 Deprecated in favor of -std=gnu11
1293 C ObjC Alias(std=gnu90)
1294 Conform to the ISO 1990 C standard with GNU extensions
1298 Conform to the ISO 1990 C standard with GNU extensions
1302 Conform to the ISO 1999 C standard with GNU extensions
1305 C ObjC Alias(std=gnu99)
1306 Deprecated in favor of -std=gnu99
1309 C ObjC Alias(std=c90)
1310 Conform to the ISO 1990 C standard
1314 Conform to the ISO 1990 C standard as amended in 1994
1317 C ObjC Alias(std=c99)
1318 Conform to the ISO 1999 C standard
1321 C ObjC Alias(std=c99)
1322 Deprecated in favor of -std=iso9899:1999
1325 C ObjC Alias(std=c11)
1326 Conform to the ISO 2011 C standard (experimental and incomplete support)
1333 Enable traditional preprocessing
1337 -trigraphs Support ISO C trigraphs
1340 C ObjC C++ ObjC++ Var(flag_undef)
1341 Do not predefine system-specific and GCC-specific macros
1345 ; Documented in common.opt
1349 ; Documented in common.opt
1351 ; This comment is to ensure we retain the blank line above.