1 ; Options for the C, ObjC, C++ and ObjC++ front ends.
2 ; Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010,
3 ; 2011 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
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) Init(-1) Warning
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
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) Init(-1) Warning
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) Init(-1) Warning
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) Init(-1) Warning
450 Warn when a jump misses a variable initialization
453 C ObjC C++ ObjC++ Var(warn_logical_op) Init(0) Warning
454 Warn when a logical operator is suspiciously always evaluating to true or false
457 C ObjC C++ ObjC++ Var(warn_long_long) Init(-1) Warning
458 Do not warn about using \"long long\" when -pedantic
461 C ObjC C++ ObjC++ Var(warn_main) Init(-1) Warning
462 Warn about suspicious declarations of \"main\"
465 C ObjC C++ ObjC++ Var(warn_missing_braces) Warning
466 Warn about possibly missing braces around initializers
468 Wmissing-declarations
469 C ObjC C++ ObjC++ Var(warn_missing_declarations) Warning
470 Warn about global functions without previous declarations
472 Wmissing-field-initializers
473 C ObjC C++ ObjC++ Var(warn_missing_field_initializers) Init(-1) Warning
474 Warn about missing fields in struct initializers
476 Wmissing-format-attribute
477 C ObjC C++ ObjC++ Var(warn_missing_format_attribute) Warning
478 Warn about functions which might be candidates for format attributes
480 Wmissing-include-dirs
481 C ObjC C++ ObjC++ Warning
482 Warn about user-specified include directories that do not exist
484 Wmissing-parameter-type
485 C ObjC Var(warn_missing_parameter_type) Init(-1) Warning
486 Warn about function parameters declared without a type specifier in K&R-style functions
489 C ObjC Var(warn_missing_prototypes) Warning
490 Warn about global functions without prototypes
493 C ObjC C++ ObjC++ Warning
494 Warn about use of multi-character character constants
497 C ObjC C++ ObjC++ Warning Var(warn_narrowing) Init(-1)
498 Warn about narrowing conversions within { } that are ill-formed in C++11
501 C ObjC Var(warn_nested_externs) Warning
502 Warn about \"extern\" declarations not at file scope
505 C++ ObjC++ Var(warn_noexcept) Warning
506 Warn when a noexcept expression evaluates to false even though the expression can't actually throw
509 C++ ObjC++ Var(warn_nontemplate_friend) Init(1) Warning
510 Warn when non-templatized friend functions are declared within a template
513 C++ ObjC++ Var(warn_nonvdtor) Warning
514 Warn about non-virtual destructors
517 C ObjC C++ ObjC++ Var(warn_nonnull) Warning
518 Warn about NULL being passed to argument slots marked as requiring non-NULL
521 C ObjC C++ ObjC++ Joined Warning
522 -Wnormalized=<id|nfc|nfkc> Warn about non-normalised Unicode strings
525 C++ ObjC++ Var(warn_old_style_cast) Warning
526 Warn if a C-style cast is used in a program
528 Wold-style-declaration
529 C ObjC Var(warn_old_style_declaration) Init(-1) Warning
530 Warn for obsolescent usage in a declaration
532 Wold-style-definition
533 C ObjC Var(warn_old_style_definition) Warning
534 Warn if an old-style parameter definition is used
537 C ObjC C++ ObjC++ Var(warn_overlength_strings) Init(-1) Warning
538 Warn if a string is longer than the maximum portable length specified by the standard
541 C++ ObjC++ Var(warn_overloaded_virtual) Warning
542 Warn about overloaded virtual function names
545 C ObjC Var(warn_override_init) Init(-1) Warning
546 Warn about overriding initializers without side effects
548 Wpacked-bitfield-compat
549 C ObjC C++ ObjC++ Var(warn_packed_bitfield_compat) Init(-1) Warning
550 Warn about packed bit-fields whose offset changed in GCC 4.4
553 C ObjC C++ ObjC++ Var(warn_parentheses) Warning
554 Warn about possibly missing parentheses
557 C++ ObjC++ Var(warn_pmf2ptr) Init(1) Warning
558 Warn when converting the type of pointers to member functions
561 C ObjC C++ ObjC++ Var(warn_pointer_arith) Warning
562 Warn about function pointer arithmetic
565 C ObjC Var(warn_pointer_to_int_cast) Init(1) Warning
566 Warn when a pointer is cast to an integer of a different size
569 C ObjC C++ ObjC++ Var(warn_pragmas) Init(1) Warning
570 Warn about misuses of pragmas
572 Wproperty-assign-default
573 ObjC ObjC++ Var(warn_property_assign_default) Init(1) Warning
574 Warn if a property for an Objective-C object has no assign semantics specified
577 ObjC ObjC++ Var(warn_protocol) Init(1) Warning
578 Warn if inherited methods are unimplemented
581 C ObjC C++ ObjC++ Var(warn_redundant_decls) Warning
582 Warn about multiple declarations of the same object
585 C++ ObjC++ Var(warn_reorder) Warning
586 Warn when the compiler reorders code
589 C ObjC C++ ObjC++ Var(warn_return_type) Warning
590 Warn whenever a function's return type defaults to \"int\" (C), or about inconsistent return types (C++)
593 ObjC ObjC++ Var(warn_selector) Warning
594 Warn if a selector has multiple methods
597 C ObjC C++ ObjC++ Var(warn_sequence_point) Warning
598 Warn about possible violations of sequence point rules
601 C ObjC C++ ObjC++ Var(warn_sign_compare) Init(-1) Warning
602 Warn about signed-unsigned comparisons
605 C++ ObjC++ Var(warn_sign_promo) Warning
606 Warn when overload promotes from unsigned to signed
608 Wstrict-null-sentinel
609 C++ ObjC++ Warning Var(warn_strict_null_sentinel)
610 Warn about uncasted NULL used as sentinel
613 C ObjC Var(warn_strict_prototypes) Warning
614 Warn about unprototyped function declarations
616 Wstrict-selector-match
617 ObjC ObjC++ Var(warn_strict_selector_match) Warning
618 Warn if type signatures of candidate methods do not match exactly
621 C C++ Var(warn_sync_nand) Init(1) Warning
622 Warn when __sync_fetch_and_nand and __sync_nand_and_fetch built-in functions are used
625 C++ ObjC++ Var(warn_synth) Warning
626 Deprecated. This switch has no effect
629 C ObjC C++ ObjC++ Warning
630 ; Documented in common.opt
633 C ObjC Var(warn_traditional) Warning
634 Warn about features not present in traditional C
636 Wtraditional-conversion
637 C ObjC Var(warn_traditional_conversion) Warning
638 Warn of prototypes causing type conversions different from what would happen in the absence of prototype
641 C ObjC C++ ObjC++ Warning
642 Warn if trigraphs are encountered that might affect the meaning of the program
645 ObjC ObjC++ Var(warn_undeclared_selector) Warning
646 Warn about @selector()s without previously declared methods
649 C ObjC C++ ObjC++ Warning
650 Warn if an undefined macro is used in an #if directive
653 C ObjC C++ ObjC++ Warning
654 Warn about unrecognized pragmas
656 Wunsuffixed-float-constants
657 C ObjC Var(warn_unsuffixed_float_constants) Warning
658 Warn about unsuffixed float constants
660 Wunused-local-typedefs
661 C ObjC C++ ObjC++ Var(warn_unused_local_typedefs) Warning
665 C ObjC C++ ObjC++ Warning
666 Warn about macros defined in the main file that are not used
669 C ObjC C++ ObjC++ Var(warn_unused_result) Init(1) Warning
670 Warn if a caller of a function, marked with attribute warn_unused_result, does not use its return value
673 C ObjC C++ ObjC++ Warning
674 Do not warn about using variadic macros when -pedantic
677 C ObjC C++ ObjC++ Var(warn_vla) Init(-1) Warning
678 Warn if a variable length array is used
680 Wvolatile-register-var
681 C ObjC C++ ObjC++ Var(warn_volatile_register_var) Warning
682 Warn when a register variable is declared volatile
685 C ObjC C++ ObjC++ Var(warn_write_strings) Warning
686 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.
689 C ObjC Var(warn_pointer_sign) Init(-1) Warning
690 Warn when a pointer differs in signedness in an assignment
692 Wzero-as-null-pointer-constant
693 C++ ObjC++ Var(warn_zero_as_null_pointer_constant) Warning
694 Warn when a literal '0' is used as null pointer
698 A synonym for -std=c89 (for C) or -std=c++98 (for C++)
701 C ObjC C++ ObjC++ Joined
702 ; Documented in common.opt. FIXME - what about -dI, -dD, -dN and -dD?
705 C++ ObjC++ Var(flag_access_control) Init(1)
706 Enforce class member access control semantics
709 C++ ObjC++ Ignore Warn(switch %qs is no longer supported)
711 fallow-parameterless-variadic-functions
712 C ObjC Var(flag_allow_parameterless_variadic_functions)
713 Allow variadic functions without named parameter
715 falt-external-templates
716 C++ ObjC++ Ignore Warn(switch %qs is no longer supported)
720 C ObjC C++ ObjC++ Var(flag_no_asm, 0)
721 Recognize the \"asm\" keyword
723 ; Define extra predefined macros for use in libgcc.
725 C ObjC C++ ObjC++ Undocumented Var(flag_building_libgcc)
728 C ObjC C++ ObjC++ Var(flag_no_builtin, 0)
729 Recognize built-in functions
732 C ObjC C++ ObjC++ Joined
735 C++ ObjC++ Var(flag_check_new)
736 Check the return value of new
740 Allow the arguments of the '?' operator to have different types
743 C++ ObjC++ Var(flag_conserve_space)
744 Reduce the size of object files
746 fconstant-string-class=
747 ObjC ObjC++ Joined MissingArgError(no class name specified with %qs)
748 -fconst-string-class=<name> Use class <name> for constant strings
751 C++ ObjC++ Joined RejectNegative UInteger Var(max_constexpr_depth) Init(512)
752 -fconstexpr-depth=<number> Specify maximum constexpr recursion depth
756 Emit debug annotations during preprocessing
759 C++ ObjC++ Var(flag_deduce_init_list) Init(0)
760 -fdeduce-init-list enable deduction of std::initializer_list for a template type parameter from a brace-enclosed initializer-list
764 Does nothing. Preserved for backward compatibility.
768 Preprocess directives only.
770 fdollars-in-identifiers
772 Permit '$' as an identifier character
775 C++ ObjC++ Var(flag_elide_constructors) Init(1)
778 C++ ObjC++ Var(flag_enforce_eh_specs) Init(1)
779 Generate code to check exception specifications
782 C++ ObjC++ Ignore Warn(switch %qs is no longer supported)
785 C ObjC C++ ObjC++ Joined RejectNegative
786 -fexec-charset=<cset> Convert all strings and character constants to character set <cset>
788 fextended-identifiers
790 Permit universal character names (\\u and \\U) in identifiers
793 C ObjC C++ ObjC++ Joined RejectNegative
794 -finput-charset=<cset> Specify the default character set for source files
798 C++ ObjC++ Ignore Warn(switch %qs is no longer supported)
801 C++ ObjC++ Var(flag_new_for_scope) Init(1)
802 Scope of for-init-statement variables is local to the loop
806 Do not assume that standard C libraries and \"main\" exist
809 C++ ObjC++ Var(flag_no_gnu_keywords, 0)
810 Recognize GNU-defined keywords
813 ObjC ObjC++ Report RejectNegative Var(flag_next_runtime,0) Init(NEXT_OBJC_RUNTIME)
814 Generate code for GNU runtime environment
817 C ObjC Var(flag_gnu89_inline) Init(-1)
818 Use traditional GNU semantics for inline functions
821 C++ ObjC++ Ignore Warn(switch %qs is no longer supported)
824 C++ ObjC++ Optimization Alias(fexceptions) Warn({-fhandle-exceptions has been renamed -fexceptions (and is now on by default)})
827 C++ ObjC++ Ignore Warn(switch %qs is no longer supported)
831 Assume normal C execution environment
834 C++ ObjC++ Ignore Warn(switch %qs is no longer supported)
838 C++ ObjC++ Var(flag_implement_inlines) Init(1)
839 Export functions even if they can be inlined
841 fimplicit-inline-templates
842 C++ ObjC++ Var(flag_implicit_inline_templates) Init(1)
843 Emit implicit instantiations of inline templates
846 C++ ObjC++ Var(flag_implicit_templates) Init(1)
847 Emit implicit instantiations of templates
850 C++ ObjC++ Var(flag_friend_injection)
851 Inject friend functions into enclosing namespace
853 fkeep-inline-dllexport
854 C C++ ObjC ObjC++ Var(flag_keep_inline_dllexport) Init(1) Report Condition(TARGET_DLLIMPORT_DECL_ATTRIBUTES)
855 Don't emit dllexported inline functions unless needed
858 C++ ObjC++ Ignore Warn(switch %qs is no longer supported)
860 flax-vector-conversions
861 C ObjC C++ ObjC++ Var(flag_lax_vector_conversions)
862 Allow implicit conversions between vectors with differing numbers of subparts and/or differing element types.
865 C ObjC C++ ObjC++ Var(flag_ms_extensions)
866 Don't warn about uses of Microsoft extensions
868 fname-mangling-version-
869 C++ ObjC++ Joined Ignore Warn(switch %qs is no longer supported)
872 C++ ObjC++ Ignore Warn(switch %qs is no longer supported)
875 ObjC ObjC++ Report RejectNegative Var(flag_next_runtime)
876 Generate code for NeXT (Apple Mac OS X) runtime environment
879 ObjC ObjC++ Var(flag_nil_receivers) Init(1)
880 Assume that receivers of Objective-C messages may be nil
883 C++ ObjC++ Var(flag_no_nonansi_builtin, 0)
886 C++ ObjC++ Ignore Warn(switch %qs is no longer supported)
889 C++ ObjC++ Optimization Var(flag_nothrow_opt)
890 Treat a throw() exception specification as noexcept to improve code size
893 ObjC ObjC++ Joined Report RejectNegative UInteger Var(flag_objc_abi)
894 Specify which ABI to use for Objective-C family code and meta-data generation.
896 ; Generate special '- .cxx_construct' and '- .cxx_destruct' methods
897 ; to initialize any non-POD ivars in Objective-C++ classes.
898 fobjc-call-cxx-cdtors
899 ObjC++ Var(flag_objc_call_cxx_cdtors)
900 Generate special Objective-C methods to initialize/destroy non-POD C++ ivars, if needed
902 fobjc-direct-dispatch
903 ObjC ObjC++ Var(flag_objc_direct_dispatch)
904 Allow fast jumps to the message dispatcher
906 ; Nonzero means that we will allow new ObjC exception syntax (@throw,
907 ; @try, etc.) in source code.
909 ObjC ObjC++ Var(flag_objc_exceptions)
910 Enable Objective-C exception and synchronization syntax
913 ObjC ObjC++ Var(flag_objc_gc)
914 Enable garbage collection (GC) in Objective-C/Objective-C++ programs
917 ObjC ObjC++ Var(flag_objc_nilcheck,1)
918 Enable inline checks for nil receivers with the NeXT runtime and ABI version 2.
920 ; Nonzero means that we generate NeXT setjmp based exceptions.
921 fobjc-sjlj-exceptions
922 ObjC ObjC++ Var(flag_objc_sjlj_exceptions) Init(-1)
923 Enable Objective-C setjmp exception handling runtime
926 ObjC ObjC++ Var(flag_objc1_only)
927 Conform to the Objective-C 1.0 language as implemented in GCC 4.0
930 C ObjC C++ ObjC++ Var(flag_openmp)
931 Enable OpenMP (implies -frecursive in Fortran)
935 Recognize C++ keywords like \"compl\" and \"xor\"
939 Does nothing. Preserved for backward compatibility.
946 Look for and use PCH files even when preprocessing
950 Downgrade conformance errors to warnings
953 C ObjC Var(flag_plan9_extensions)
954 Enable Plan 9 language extensions
958 Treat the input file as already preprocessed
960 ftrack-macro-expansion
961 C ObjC C++ ObjC++ JoinedOrMissing RejectNegative UInteger
962 ; converted into ftrack-macro-expansion=
964 ftrack-macro-expansion=
965 C ObjC C++ ObjC++ JoinedOrMissing RejectNegative UInteger
966 -ftrack-macro-expansion=<0|1|2> Track locations of tokens coming from macro expansion and display them in error messages
969 C++ ObjC++ Var(flag_pretty_templates) Init(1)
970 -fno-pretty-templates Do not pretty-print template specializations as the template signature followed by the arguments
972 freplace-objc-classes
973 ObjC ObjC++ Var(flag_replace_objc_classes)
974 Used in Fix-and-Continue mode to indicate that object files may be swapped in at runtime
978 Enable automatic template instantiation
981 C++ ObjC++ Optimization Var(flag_rtti) Init(1)
982 Generate run time type descriptor information
985 C ObjC C++ ObjC++ Optimization Var(flag_short_double)
986 Use the same size for double as for float
989 C ObjC C++ ObjC++ Optimization Var(flag_short_enums)
990 Use the narrowest integer type possible for enumeration types
993 C ObjC C++ ObjC++ Optimization Var(flag_short_wchar)
994 Force the underlying type for \"wchar_t\" to be \"unsigned short\"
997 C ObjC C++ ObjC++ Var(flag_signed_bitfields) Init(1)
998 When \"signed\" or \"unsigned\" is not given make the bitfield signed
1001 C ObjC C++ ObjC++ LTO Var(flag_signed_char)
1002 Make \"char\" signed by default
1005 C++ ObjC++ Ignore Warn(switch %qs is no longer supported)
1008 C++ ObjC++ Var(flag_detailed_statistics)
1009 Display statistics accumulated during compilation
1012 C++ ObjC++ Optimization Var(flag_strict_enums)
1013 Assume that values of enumeration type are always within the minimum range of that type
1016 C++ ObjC++ Ignore Warn(switch %qs is no longer supported)
1019 C ObjC C++ ObjC++ Joined RejectNegative UInteger
1020 -ftabstop=<number> Distance between tab stops for column reporting
1023 C++ ObjC++ Joined RejectNegative Undocumented Alias(ftemplate-depth=)
1026 C++ ObjC++ Joined RejectNegative UInteger
1027 -ftemplate-depth=<number> Specify maximum template instantiation depth
1030 C++ ObjC++ Ignore Warn(switch %qs is no longer supported)
1033 C++ ObjC++ Optimization Var(flag_threadsafe_statics) Init(1)
1034 -fno-threadsafe-statics Do not generate thread-safe code for initializing local statics
1037 C ObjC C++ ObjC++ Var(flag_signed_bitfields, 0)
1038 When \"signed\" or \"unsigned\" is not given make the bitfield unsigned
1041 C ObjC C++ ObjC++ LTO Var(flag_signed_char, 0)
1042 Make \"char\" unsigned by default
1045 C++ ObjC++ Var(flag_use_cxa_atexit) Init(DEFAULT_USE_CXA_ATEXIT)
1046 Use __cxa_atexit to register destructors
1048 fuse-cxa-get-exception-ptr
1049 C++ ObjC++ Var(flag_use_cxa_get_exception_ptr) Init(2)
1050 Use __cxa_get_exception_ptr in exception handling
1052 fvisibility-inlines-hidden
1054 Marks all inlined functions and methods as having hidden visibility
1056 fvisibility-ms-compat
1057 C++ ObjC++ Var(flag_visibility_ms_compat)
1058 Changes visibility to match Microsoft Visual Studio by default
1061 C++ ObjC++ Ignore Warn(switch %qs is no longer supported)
1065 C++ ObjC++ Ignore Warn(switch %qs is no longer supported)
1069 C++ ObjC++ Var(flag_weak) Init(1)
1070 Emit common-like symbols as weak symbols
1073 C ObjC C++ ObjC++ Joined RejectNegative
1074 -fwide-exec-charset=<cset> Convert all wide strings and character constants to character set <cset>
1077 C ObjC C++ ObjC++ Var(flag_working_directory) Init(-1)
1078 Generate a #line directive pointing at the current working directory
1081 C++ ObjC++ Ignore Warn(switch %qs is no longer supported)
1085 ObjC ObjC++ Var(flag_zero_link)
1086 Generate lazy class lookup (via objc_getClass()) for use in Zero-Link mode
1089 ObjC ObjC++ Var(flag_gen_declaration)
1090 Dump declarations to a .decl file
1092 femit-struct-debug-baseonly
1094 -femit-struct-debug-baseonly Aggressive reduced debug info for structs
1096 femit-struct-debug-reduced
1098 -femit-struct-debug-reduced Conservative reduced debug info for structs
1100 femit-struct-debug-detailed=
1101 C ObjC C++ ObjC++ Joined
1102 -femit-struct-debug-detailed=<spec-list> Detailed reduced debug info for structs
1105 C ObjC C++ ObjC++ Joined Separate MissingArgError(missing path after %qs)
1106 -idirafter <dir> Add <dir> to the end of the system include path
1109 C ObjC C++ ObjC++ Joined Separate MissingArgError(missing filename after %qs)
1110 -imacros <file> Accept definition of macros in <file>
1113 C ObjC C++ ObjC++ Joined Separate
1114 -imultilib <dir> Set <dir> to be the multilib include subdirectory
1117 C ObjC C++ ObjC++ Joined Separate MissingArgError(missing filename after %qs)
1118 -include <file> Include the contents of <file> before other files
1121 C ObjC C++ ObjC++ Joined Separate
1122 -iprefix <path> Specify <path> as a prefix for next two options
1125 C ObjC C++ ObjC++ Joined Separate MissingArgError(missing path after %qs)
1126 -isysroot <dir> Set <dir> to be the system root directory
1129 C ObjC C++ ObjC++ Joined Separate MissingArgError(missing path after %qs)
1130 -isystem <dir> Add <dir> to the start of the system include path
1133 C ObjC C++ ObjC++ Joined Separate MissingArgError(missing path after %qs)
1134 -iquote <dir> Add <dir> to the end of the quote include path
1137 C ObjC C++ ObjC++ Joined Separate
1138 -iwithprefix <dir> Add <dir> to the end of the system include path
1141 C ObjC C++ ObjC++ Joined Separate
1142 -iwithprefixbefore <dir> Add <dir> to the end of the main include path
1145 C Undocumented RejectDriver
1152 Do not search standard system include directories (those specified with -isystem will still be used)
1156 Do not search standard system include directories for C++
1159 C ObjC C++ ObjC++ Joined Separate
1160 ; Documented in common.opt
1164 ; Documented in common.opt
1168 ; Documented in common.opt
1170 print-objc-runtime-info
1172 Generate C header of platform-specific features
1176 Remap file names when including files
1180 Conform to the ISO 1998 C++ standard revised by the 2003 technical corrigendum
1183 C++ ObjC++ Alias(std=c++98)
1184 Conform to the ISO 1998 C++ standard revised by the 2003 technical corrigendum
1188 Conform to the ISO 2011 C++ standard (experimental and incomplete support)
1191 C++ ObjC++ Alias(std=c++11)
1192 Deprecated in favor of -std=c++11
1196 Conform to the ISO 201X C standard draft (experimental and incomplete support)
1199 C ObjC Alias(std=c90)
1200 Conform to the ISO 1990 C standard
1204 Conform to the ISO 1990 C standard
1208 Conform to the ISO 1999 C standard
1211 C ObjC Alias(std=c99)
1212 Deprecated in favor of -std=c99
1216 Conform to the ISO 1998 C++ standard revised by the 2003 technical
1217 corrigendum with GNU extensions
1220 C++ ObjC++ Alias(std=gnu++98)
1221 Conform to the ISO 1998 C++ standard revised by the 2003 technical
1222 corrigendum with GNU extensions
1226 Conform to the ISO 2011 C++ standard with GNU extensions (experimental and incomplete support)
1229 C++ ObjC++ Alias(std=gnu++11)
1230 Deprecated in favor of -std=gnu++11
1234 Conform to the ISO 201X C standard draft with GNU extensions (experimental and incomplete support)
1237 C ObjC Alias(std=gnu90)
1238 Conform to the ISO 1990 C standard with GNU extensions
1242 Conform to the ISO 1990 C standard with GNU extensions
1246 Conform to the ISO 1999 C standard with GNU extensions
1249 C ObjC Alias(std=gnu99)
1250 Deprecated in favor of -std=gnu99
1253 C ObjC Alias(std=c90)
1254 Conform to the ISO 1990 C standard
1258 Conform to the ISO 1990 C standard as amended in 1994
1261 C ObjC Alias(std=c99)
1262 Conform to the ISO 1999 C standard
1265 C ObjC Alias(std=c99)
1266 Deprecated in favor of -std=iso9899:1999
1273 Enable traditional preprocessing
1277 -trigraphs Support ISO C trigraphs
1280 C ObjC C++ ObjC++ Var(flag_undef)
1281 Do not predefine system-specific and GCC-specific macros
1285 ; Documented in common.opt
1289 ; Documented in common.opt
1291 ; This comment is to ensure we retain the blank line above.