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 Warn about C++ constructs whose meaning differs between ISO C++ 1998 and ISO C++ 200x
295 C ObjC C++ ObjC++ Var(warn_cast_qual) Warning
296 Warn about casts which discard qualifiers
299 C ObjC C++ ObjC++ Var(warn_char_subscripts) Warning
300 Warn about subscripts whose type is \"char\"
303 C ObjC C++ ObjC++ Var(warn_clobbered) Init(-1) Warning
304 Warn about variables that might be changed by \"longjmp\" or \"vfork\"
307 C ObjC C++ ObjC++ Warning
308 Warn about possibly nested block comments, and C++ comments spanning more than one physical line
311 C ObjC C++ ObjC++ Warning Alias(Wcomment)
312 Synonym for -Wcomment
315 C ObjC C++ ObjC++ Var(warn_conversion) Warning
316 Warn for implicit type conversions that may change a value
319 C++ ObjC++ Var(warn_conversion_null) Init(1) Warning
320 Warn for converting NULL from/to a non-pointer type
323 C ObjC C++ ObjC++ Var(warn_sign_conversion) Init(-1)
324 Warn for implicit type conversions between signed and unsigned integers
327 C++ ObjC++ Var(warn_ctor_dtor_privacy) Warning
328 Warn when all constructors and destructors are private
330 Wdeclaration-after-statement
331 C ObjC Var(warn_declaration_after_statement) Warning
332 Warn when a declaration is found after a statement
334 Wdelete-non-virtual-dtor
335 C++ ObjC++ Var(warn_delnonvdtor) Warning
336 Warn about deleting polymorphic objects with non-virtual destructors
339 C C++ ObjC ObjC++ Var(warn_deprecated) Init(1) Warning
340 Warn if a deprecated compiler feature, class, method, or field is used
343 C ObjC C++ ObjC++ Var(warn_div_by_zero) Init(1) Warning
344 Warn about compile-time integer division by zero
347 C++ ObjC++ Var(warn_ecpp) Warning
348 Warn about violations of Effective C++ style rules
351 C ObjC C++ ObjC++ Var(warn_empty_body) Init(-1) Warning
352 Warn about an empty body in an if or else statement
355 C ObjC C++ ObjC++ Warning
356 Warn about stray tokens after #elif and #endif
359 C ObjC C++ ObjC++ Var(warn_enum_compare) Init(-1) Warning
360 Warn about comparison of different enum types
364 ; Documented in common.opt
366 Werror-implicit-function-declaration
367 C ObjC RejectNegative Warning Alias(Werror=, implicit-function-declaration)
368 This switch is deprecated; use -Werror=implicit-function-declaration instead
371 C ObjC C++ ObjC++ Var(warn_float_equal) Warning
372 Warn if testing floating point numbers for equality
375 C ObjC C++ ObjC++ Warning
376 Warn about printf/scanf/strftime/strfmon format string anomalies
379 C ObjC C++ ObjC++ Var(warn_format_extra_args) Warning
380 Warn if passing too many arguments to a function for its format string
383 C ObjC C++ ObjC++ Var(warn_format_nonliteral) Warning
384 Warn about format strings that are not literals
387 C ObjC C++ ObjC++ Var(warn_format_contains_nul) Warning
388 Warn about format strings that contain NUL bytes
391 C ObjC C++ ObjC++ Var(warn_format_security) Warning
392 Warn about possible security problems with format functions
395 C ObjC C++ ObjC++ Var(warn_format_y2k) Warning
396 Warn about strftime formats yielding 2-digit years
399 C ObjC C++ ObjC++ Var(warn_format_zero_length) Warning
400 Warn about zero-length formats
403 C ObjC C++ ObjC++ Joined Warning
406 C C++ Var(warn_ignored_qualifiers) Init(-1) Warning
407 Warn whenever type qualifiers are ignored.
410 C ObjC C++ ObjC++ Var(warn_init_self) Warning
411 Warn about variables which are initialized to themselves
414 C ObjC Var(warn_implicit) Init(-1) Warning
415 Warn about implicit declarations
418 C ObjC C++ ObjC++ Var(warn_double_promotion) Warning
419 Warn about implicit conversions from \"float\" to \"double\"
421 Wimplicit-function-declaration
422 C ObjC Var(warn_implicit_function_declaration) Init(-1) Warning
423 Warn about implicit function declarations
426 C ObjC Var(warn_implicit_int) Init(-1) Warning
427 Warn when a declaration does not specify a type
430 C ObjC C++ ObjC++ Undocumented Ignore
433 C ObjC C++ ObjC++ Var(warn_int_to_pointer_cast) Init(1) Warning
434 Warn when there is a cast to a pointer from an integer of a different size
437 C++ ObjC++ Var(warn_invalid_offsetof) Init(1) Warning
438 Warn about invalid uses of the \"offsetof\" macro
441 C ObjC C++ ObjC++ Warning
442 Warn about PCH files that are found but not used
445 C ObjC Var(warn_jump_misses_init) Init(-1) Warning
446 Warn when a jump misses a variable initialization
449 C ObjC C++ ObjC++ Var(warn_logical_op) Init(0) Warning
450 Warn when a logical operator is suspiciously always evaluating to true or false
453 C ObjC C++ ObjC++ Var(warn_long_long) Init(-1) Warning
454 Do not warn about using \"long long\" when -pedantic
457 C ObjC C++ ObjC++ Var(warn_main) Init(-1) Warning
458 Warn about suspicious declarations of \"main\"
461 C ObjC C++ ObjC++ Var(warn_missing_braces) Warning
462 Warn about possibly missing braces around initializers
464 Wmissing-declarations
465 C ObjC C++ ObjC++ Var(warn_missing_declarations) Warning
466 Warn about global functions without previous declarations
468 Wmissing-field-initializers
469 C ObjC C++ ObjC++ Var(warn_missing_field_initializers) Init(-1) Warning
470 Warn about missing fields in struct initializers
472 Wmissing-format-attribute
473 C ObjC C++ ObjC++ Var(warn_missing_format_attribute) Warning
474 Warn about functions which might be candidates for format attributes
476 Wmissing-include-dirs
477 C ObjC C++ ObjC++ Warning
478 Warn about user-specified include directories that do not exist
480 Wmissing-parameter-type
481 C ObjC Var(warn_missing_parameter_type) Init(-1) Warning
482 Warn about function parameters declared without a type specifier in K&R-style functions
485 C ObjC Var(warn_missing_prototypes) Warning
486 Warn about global functions without prototypes
489 C ObjC C++ ObjC++ Warning
490 Warn about use of multi-character character constants
493 C ObjC C++ ObjC++ Warning Var(warn_narrowing) Init(1)
494 -Wno-narrowing In C++0x mode, ignore ill-formed narrowing conversions within { }
497 C ObjC Var(warn_nested_externs) Warning
498 Warn about \"extern\" declarations not at file scope
501 C++ ObjC++ Var(warn_noexcept) Warning
502 Warn when a noexcept expression evaluates to false even though the expression can't actually throw
505 C++ ObjC++ Var(warn_nontemplate_friend) Init(1) Warning
506 Warn when non-templatized friend functions are declared within a template
509 C++ ObjC++ Var(warn_nonvdtor) Warning
510 Warn about non-virtual destructors
513 C ObjC Var(warn_nonnull) Warning
514 Warn about NULL being passed to argument slots marked as requiring non-NULL
517 C ObjC C++ ObjC++ Joined Warning
518 -Wnormalized=<id|nfc|nfkc> Warn about non-normalised Unicode strings
521 C++ ObjC++ Var(warn_old_style_cast) Warning
522 Warn if a C-style cast is used in a program
524 Wold-style-declaration
525 C ObjC Var(warn_old_style_declaration) Init(-1) Warning
526 Warn for obsolescent usage in a declaration
528 Wold-style-definition
529 C ObjC Var(warn_old_style_definition) Warning
530 Warn if an old-style parameter definition is used
533 C ObjC C++ ObjC++ Var(warn_overlength_strings) Init(-1) Warning
534 Warn if a string is longer than the maximum portable length specified by the standard
537 C++ ObjC++ Var(warn_overloaded_virtual) Warning
538 Warn about overloaded virtual function names
541 C ObjC Var(warn_override_init) Init(-1) Warning
542 Warn about overriding initializers without side effects
544 Wpacked-bitfield-compat
545 C ObjC C++ ObjC++ Var(warn_packed_bitfield_compat) Init(-1) Warning
546 Warn about packed bit-fields whose offset changed in GCC 4.4
549 C ObjC C++ ObjC++ Var(warn_parentheses) Warning
550 Warn about possibly missing parentheses
553 C++ ObjC++ Var(warn_pmf2ptr) Init(1) Warning
554 Warn when converting the type of pointers to member functions
557 C ObjC C++ ObjC++ Var(warn_pointer_arith) Warning
558 Warn about function pointer arithmetic
561 C ObjC Var(warn_pointer_to_int_cast) Init(1) Warning
562 Warn when a pointer is cast to an integer of a different size
565 C ObjC C++ ObjC++ Var(warn_pragmas) Init(1) Warning
566 Warn about misuses of pragmas
568 Wproperty-assign-default
569 ObjC ObjC++ Var(warn_property_assign_default) Init(1) Warning
570 Warn if a property for an Objective-C object has no assign semantics specified
573 ObjC ObjC++ Var(warn_protocol) Init(1) Warning
574 Warn if inherited methods are unimplemented
577 C ObjC C++ ObjC++ Var(warn_redundant_decls) Warning
578 Warn about multiple declarations of the same object
581 C++ ObjC++ Var(warn_reorder) Warning
582 Warn when the compiler reorders code
585 C ObjC C++ ObjC++ Var(warn_return_type) Warning
586 Warn whenever a function's return type defaults to \"int\" (C), or about inconsistent return types (C++)
589 ObjC ObjC++ Var(warn_selector) Warning
590 Warn if a selector has multiple methods
593 C ObjC C++ ObjC++ Var(warn_sequence_point) Warning
594 Warn about possible violations of sequence point rules
597 C ObjC C++ ObjC++ Var(warn_sign_compare) Init(-1) Warning
598 Warn about signed-unsigned comparisons
601 C++ ObjC++ Var(warn_sign_promo) Warning
602 Warn when overload promotes from unsigned to signed
604 Wstrict-null-sentinel
605 C++ ObjC++ Warning Var(warn_strict_null_sentinel)
606 Warn about uncasted NULL used as sentinel
609 C ObjC Var(warn_strict_prototypes) Warning
610 Warn about unprototyped function declarations
612 Wstrict-selector-match
613 ObjC ObjC++ Var(warn_strict_selector_match) Warning
614 Warn if type signatures of candidate methods do not match exactly
617 C C++ Var(warn_sync_nand) Init(1) Warning
618 Warn when __sync_fetch_and_nand and __sync_nand_and_fetch built-in functions are used
621 C++ ObjC++ Var(warn_synth) Warning
622 Deprecated. This switch has no effect
625 C ObjC C++ ObjC++ Warning
626 ; Documented in common.opt
629 C ObjC Var(warn_traditional) Warning
630 Warn about features not present in traditional C
632 Wtraditional-conversion
633 C ObjC Var(warn_traditional_conversion) Warning
634 Warn of prototypes causing type conversions different from what would happen in the absence of prototype
637 C ObjC C++ ObjC++ Warning
638 Warn if trigraphs are encountered that might affect the meaning of the program
641 ObjC ObjC++ Var(warn_undeclared_selector) Warning
642 Warn about @selector()s without previously declared methods
645 C ObjC C++ ObjC++ Warning
646 Warn if an undefined macro is used in an #if directive
649 C ObjC C++ ObjC++ Warning
650 Warn about unrecognized pragmas
652 Wunsuffixed-float-constants
653 C ObjC Var(warn_unsuffixed_float_constants) Warning
654 Warn about unsuffixed float constants
656 Wunused-local-typedefs
657 C ObjC C++ ObjC++ Var(warn_unused_local_typedefs) Warning
661 C ObjC C++ ObjC++ Warning
662 Warn about macros defined in the main file that are not used
665 C ObjC C++ ObjC++ Var(warn_unused_result) Init(1) Warning
666 Warn if a caller of a function, marked with attribute warn_unused_result, does not use its return value
669 C ObjC C++ ObjC++ Warning
670 Do not warn about using variadic macros when -pedantic
673 C ObjC C++ ObjC++ Var(warn_vla) Init(-1) Warning
674 Warn if a variable length array is used
676 Wvolatile-register-var
677 C ObjC C++ ObjC++ Var(warn_volatile_register_var) Warning
678 Warn when a register variable is declared volatile
681 C ObjC C++ ObjC++ Var(warn_write_strings) Warning
682 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.
685 C ObjC Var(warn_pointer_sign) Init(-1) Warning
686 Warn when a pointer differs in signedness in an assignment
690 A synonym for -std=c89 (for C) or -std=c++98 (for C++)
693 C ObjC C++ ObjC++ Joined
694 ; Documented in common.opt. FIXME - what about -dI, -dD, -dN and -dD?
697 C++ ObjC++ Var(flag_access_control) Init(1)
698 Enforce class member access control semantics
701 C++ ObjC++ Ignore Warn(switch %qs is no longer supported)
703 fallow-parameterless-variadic-functions
704 C ObjC Var(flag_allow_parameterless_variadic_functions)
705 Allow variadic functions without named parameter
707 falt-external-templates
708 C++ ObjC++ Ignore Warn(switch %qs is no longer supported)
712 C ObjC C++ ObjC++ Var(flag_no_asm, 0)
713 Recognize the \"asm\" keyword
715 ; Define extra predefined macros for use in libgcc.
717 C ObjC C++ ObjC++ Undocumented Var(flag_building_libgcc)
720 C ObjC C++ ObjC++ Var(flag_no_builtin, 0)
721 Recognize built-in functions
724 C ObjC C++ ObjC++ Joined
727 C++ ObjC++ Var(flag_check_new)
728 Check the return value of new
732 Allow the arguments of the '?' operator to have different types
735 C++ ObjC++ Var(flag_conserve_space)
736 Reduce the size of object files
738 fconstant-string-class=
739 ObjC ObjC++ Joined MissingArgError(no class name specified with %qs)
740 -fconst-string-class=<name> Use class <name> for constant strings
743 C++ ObjC++ Joined RejectNegative UInteger Var(max_constexpr_depth) Init(512)
744 -fconstexpr-depth=<number> Specify maximum constexpr recursion depth
747 C++ ObjC++ Var(flag_deduce_init_list) Init(1)
748 -fno-deduce-init-list disable deduction of std::initializer_list for a template type parameter from a brace-enclosed initializer-list
752 Does nothing. Preserved for backward compatibility.
756 Preprocess directives only.
758 fdollars-in-identifiers
760 Permit '$' as an identifier character
763 C++ ObjC++ Var(flag_elide_constructors) Init(1)
766 C++ ObjC++ Var(flag_enforce_eh_specs) Init(1)
767 Generate code to check exception specifications
770 C++ ObjC++ Ignore Warn(switch %qs is no longer supported)
773 C ObjC C++ ObjC++ Joined RejectNegative
774 -fexec-charset=<cset> Convert all strings and character constants to character set <cset>
776 fextended-identifiers
778 Permit universal character names (\\u and \\U) in identifiers
781 C ObjC C++ ObjC++ Joined RejectNegative
782 -finput-charset=<cset> Specify the default character set for source files
786 C++ ObjC++ Ignore Warn(switch %qs is no longer supported)
789 C++ ObjC++ Var(flag_new_for_scope) Init(1)
790 Scope of for-init-statement variables is local to the loop
794 Do not assume that standard C libraries and \"main\" exist
797 C++ ObjC++ Var(flag_no_gnu_keywords, 0)
798 Recognize GNU-defined keywords
802 Generate code for GNU runtime environment
805 C ObjC Var(flag_gnu89_inline) Init(-1)
806 Use traditional GNU semantics for inline functions
809 C++ ObjC++ Ignore Warn(switch %qs is no longer supported)
812 C++ ObjC++ Optimization Alias(fexceptions) Warn({-fhandle-exceptions has been renamed -fexceptions (and is now on by default)})
815 C++ ObjC++ Ignore Warn(switch %qs is no longer supported)
819 Assume normal C execution environment
822 C++ ObjC++ Ignore Warn(switch %qs is no longer supported)
826 C++ ObjC++ Var(flag_implement_inlines) Init(1)
827 Export functions even if they can be inlined
829 fimplicit-inline-templates
830 C++ ObjC++ Var(flag_implicit_inline_templates) Init(1)
831 Emit implicit instantiations of inline templates
834 C++ ObjC++ Var(flag_implicit_templates) Init(1)
835 Emit implicit instantiations of templates
838 C++ ObjC++ Var(flag_friend_injection)
839 Inject friend functions into enclosing namespace
841 fkeep-inline-dllexport
842 C C++ ObjC ObjC++ Var(flag_keep_inline_dllexport) Init(1) Report Condition(TARGET_DLLIMPORT_DECL_ATTRIBUTES)
843 Don't emit dllexported inline functions unless needed
846 C++ ObjC++ Ignore Warn(switch %qs is no longer supported)
848 flax-vector-conversions
849 C ObjC C++ ObjC++ Var(flag_lax_vector_conversions)
850 Allow implicit conversions between vectors with differing numbers of subparts and/or differing element types.
853 C ObjC C++ ObjC++ Var(flag_ms_extensions)
854 Don't warn about uses of Microsoft extensions
856 fname-mangling-version-
857 C++ ObjC++ Joined Ignore Warn(switch %qs is no longer supported)
860 C++ ObjC++ Ignore Warn(switch %qs is no longer supported)
864 Generate code for NeXT (Apple Mac OS X) runtime environment
867 ObjC ObjC++ Var(flag_nil_receivers) Init(1)
868 Assume that receivers of Objective-C messages may be nil
871 C++ ObjC++ Var(flag_no_nonansi_builtin, 0)
874 C++ ObjC++ Ignore Warn(switch %qs is no longer supported)
877 C++ ObjC++ Optimization Var(flag_nothrow_opt)
878 Treat a throw() exception specification as noexcept to improve code size
881 ObjC ObjC++ Joined Report RejectNegative UInteger Var(flag_objc_abi)
882 Specify which ABI to use for Objective-C family code and meta-data generation.
884 ; Generate special '- .cxx_construct' and '- .cxx_destruct' methods
885 ; to initialize any non-POD ivars in Objective-C++ classes.
886 fobjc-call-cxx-cdtors
887 ObjC++ Var(flag_objc_call_cxx_cdtors)
888 Generate special Objective-C methods to initialize/destroy non-POD C++ ivars, if needed
890 fobjc-direct-dispatch
891 ObjC ObjC++ Var(flag_objc_direct_dispatch)
892 Allow fast jumps to the message dispatcher
894 ; Nonzero means that we will allow new ObjC exception syntax (@throw,
895 ; @try, etc.) in source code.
897 ObjC ObjC++ Var(flag_objc_exceptions)
898 Enable Objective-C exception and synchronization syntax
901 ObjC ObjC++ Var(flag_objc_gc)
902 Enable garbage collection (GC) in Objective-C/Objective-C++ programs
905 ObjC ObjC++ Var(flag_objc_nilcheck,1)
906 Enable inline checks for nil receivers with the NeXT runtime and ABI version 2.
908 ; Nonzero means that we generate NeXT setjmp based exceptions.
909 fobjc-sjlj-exceptions
910 ObjC ObjC++ Var(flag_objc_sjlj_exceptions) Init(-1)
911 Enable Objective-C setjmp exception handling runtime
914 ObjC ObjC++ Var(flag_objc1_only)
915 Conform to the Objective-C 1.0 language as implemented in GCC 4.0
918 C ObjC C++ ObjC++ Var(flag_openmp)
919 Enable OpenMP (implies -frecursive in Fortran)
923 Recognize C++ keywords like \"compl\" and \"xor\"
927 Does nothing. Preserved for backward compatibility.
934 Look for and use PCH files even when preprocessing
938 Downgrade conformance errors to warnings
941 C ObjC Var(flag_plan9_extensions)
942 Enable Plan 9 language extensions
946 Treat the input file as already preprocessed
949 C++ ObjC++ Var(flag_pretty_templates) Init(1)
950 -fno-pretty-templates Do not pretty-print template specializations as the template signature followed by the arguments
952 freplace-objc-classes
953 ObjC ObjC++ Var(flag_replace_objc_classes)
954 Used in Fix-and-Continue mode to indicate that object files may be swapped in at runtime
958 Enable automatic template instantiation
961 C++ ObjC++ Optimization Var(flag_rtti) Init(1)
962 Generate run time type descriptor information
965 C ObjC C++ ObjC++ Optimization Var(flag_short_double)
966 Use the same size for double as for float
969 C ObjC C++ ObjC++ Optimization Var(flag_short_enums)
970 Use the narrowest integer type possible for enumeration types
973 C ObjC C++ ObjC++ Optimization Var(flag_short_wchar)
974 Force the underlying type for \"wchar_t\" to be \"unsigned short\"
977 C ObjC C++ ObjC++ Var(flag_signed_bitfields) Init(1)
978 When \"signed\" or \"unsigned\" is not given make the bitfield signed
981 C ObjC C++ ObjC++ LTO Var(flag_signed_char)
982 Make \"char\" signed by default
985 C++ ObjC++ Ignore Warn(switch %qs is no longer supported)
988 C++ ObjC++ Var(flag_detailed_statistics)
989 Display statistics accumulated during compilation
992 C++ ObjC++ Optimization Var(flag_strict_enums)
993 Assume that values of enumeration type are always within the minimum range of that type
996 C++ ObjC++ Ignore Warn(switch %qs is no longer supported)
999 C ObjC C++ ObjC++ Joined RejectNegative UInteger
1000 -ftabstop=<number> Distance between tab stops for column reporting
1003 C++ ObjC++ Joined RejectNegative Undocumented Alias(ftemplate-depth=)
1006 C++ ObjC++ Joined RejectNegative UInteger
1007 -ftemplate-depth=<number> Specify maximum template instantiation depth
1010 C++ ObjC++ Ignore Warn(switch %qs is no longer supported)
1013 C++ ObjC++ Optimization Var(flag_threadsafe_statics) Init(1)
1014 -fno-threadsafe-statics Do not generate thread-safe code for initializing local statics
1017 C ObjC C++ ObjC++ Var(flag_signed_bitfields, 0)
1018 When \"signed\" or \"unsigned\" is not given make the bitfield unsigned
1021 C ObjC C++ ObjC++ LTO Var(flag_signed_char, 0)
1022 Make \"char\" unsigned by default
1025 C++ ObjC++ Var(flag_use_cxa_atexit) Init(DEFAULT_USE_CXA_ATEXIT)
1026 Use __cxa_atexit to register destructors
1028 fuse-cxa-get-exception-ptr
1029 C++ ObjC++ Var(flag_use_cxa_get_exception_ptr) Init(2)
1030 Use __cxa_get_exception_ptr in exception handling
1032 fvisibility-inlines-hidden
1034 Marks all inlined methods as having hidden visibility
1036 fvisibility-ms-compat
1037 C++ ObjC++ Var(flag_visibility_ms_compat)
1038 Changes visibility to match Microsoft Visual Studio by default
1041 C++ ObjC++ Ignore Warn(switch %qs is no longer supported)
1045 C++ ObjC++ Ignore Warn(switch %qs is no longer supported)
1049 C++ ObjC++ Var(flag_weak) Init(1)
1050 Emit common-like symbols as weak symbols
1053 C ObjC C++ ObjC++ Joined RejectNegative
1054 -fwide-exec-charset=<cset> Convert all wide strings and character constants to character set <cset>
1057 C ObjC C++ ObjC++ Var(flag_working_directory) Init(-1)
1058 Generate a #line directive pointing at the current working directory
1061 C++ ObjC++ Ignore Warn(switch %qs is no longer supported)
1065 ObjC ObjC++ Var(flag_zero_link)
1066 Generate lazy class lookup (via objc_getClass()) for use in Zero-Link mode
1069 ObjC ObjC++ Var(flag_gen_declaration)
1070 Dump declarations to a .decl file
1072 femit-struct-debug-baseonly
1074 -femit-struct-debug-baseonly Aggressive reduced debug info for structs
1076 femit-struct-debug-reduced
1078 -femit-struct-debug-reduced Conservative reduced debug info for structs
1080 femit-struct-debug-detailed=
1081 C ObjC C++ ObjC++ Joined
1082 -femit-struct-debug-detailed=<spec-list> Detailed reduced debug info for structs
1085 C ObjC C++ ObjC++ Joined Separate MissingArgError(missing path after %qs)
1086 -idirafter <dir> Add <dir> to the end of the system include path
1089 C ObjC C++ ObjC++ Joined Separate MissingArgError(missing filename after %qs)
1090 -imacros <file> Accept definition of macros in <file>
1093 C ObjC C++ ObjC++ Joined Separate
1094 -imultilib <dir> Set <dir> to be the multilib include subdirectory
1097 C ObjC C++ ObjC++ Joined Separate MissingArgError(missing filename after %qs)
1098 -include <file> Include the contents of <file> before other files
1101 C ObjC C++ ObjC++ Joined Separate
1102 -iprefix <path> Specify <path> as a prefix for next two options
1105 C ObjC C++ ObjC++ Joined Separate MissingArgError(missing path after %qs)
1106 -isysroot <dir> Set <dir> to be the system root directory
1109 C ObjC C++ ObjC++ Joined Separate MissingArgError(missing path after %qs)
1110 -isystem <dir> Add <dir> to the start of the system include path
1113 C ObjC C++ ObjC++ Joined Separate MissingArgError(missing path after %qs)
1114 -iquote <dir> Add <dir> to the end of the quote include path
1117 C ObjC C++ ObjC++ Joined Separate
1118 -iwithprefix <dir> Add <dir> to the end of the system include path
1121 C ObjC C++ ObjC++ Joined Separate
1122 -iwithprefixbefore <dir> Add <dir> to the end of the main include path
1125 C Undocumented RejectDriver
1132 Do not search standard system include directories (those specified with -isystem will still be used)
1136 Do not search standard system include directories for C++
1139 C ObjC C++ ObjC++ Joined Separate
1140 ; Documented in common.opt
1144 ; Documented in common.opt
1148 ; Documented in common.opt
1150 print-objc-runtime-info
1152 Generate C header of platform-specific features
1156 Remap file names when including files
1160 Conform to the ISO 1998 C++ standard revised by the 2003 technical corrigendum
1163 C++ ObjC++ Alias(std=c++98)
1164 Conform to the ISO 1998 C++ standard revised by the 2003 technical corrigendum
1168 Conform to the ISO 1998 C++ standard, with extensions that are likely to
1169 become a part of the upcoming ISO C++ standard, dubbed C++0x. Note that the
1170 extensions enabled by this mode are experimental and may be removed in
1171 future releases of GCC.
1175 Conform to the ISO 201X C standard draft (experimental and incomplete support)
1178 C ObjC Alias(std=c90)
1179 Conform to the ISO 1990 C standard
1183 Conform to the ISO 1990 C standard
1187 Conform to the ISO 1999 C standard
1190 C ObjC Alias(std=c99)
1191 Deprecated in favor of -std=c99
1195 Conform to the ISO 1998 C++ standard with GNU extensions
1199 Conform to the ISO 1998 C++ standard, with GNU extensions and
1200 extensions that are likely to become a part of the upcoming ISO C++
1201 standard, dubbed C++0x. Note that the extensions enabled by this mode
1202 are experimental and may be removed in future releases of GCC.
1206 Conform to the ISO 201X C standard draft with GNU extensions (experimental and incomplete support)
1209 C ObjC Alias(std=gnu90)
1210 Conform to the ISO 1990 C standard with GNU extensions
1214 Conform to the ISO 1990 C standard with GNU extensions
1218 Conform to the ISO 1999 C standard with GNU extensions
1221 C ObjC Alias(std=gnu99)
1222 Deprecated in favor of -std=gnu99
1225 C ObjC Alias(std=c90)
1226 Conform to the ISO 1990 C standard
1230 Conform to the ISO 1990 C standard as amended in 1994
1233 C ObjC Alias(std=c99)
1234 Conform to the ISO 1999 C standard
1237 C ObjC Alias(std=c99)
1238 Deprecated in favor of -std=iso9899:1999
1245 Enable traditional preprocessing
1249 -trigraphs Support ISO C trigraphs
1252 C ObjC C++ ObjC++ Var(flag_undef)
1253 Do not predefine system-specific and GCC-specific macros
1257 ; Documented in common.opt
1261 ; Documented in common.opt
1263 ; This comment is to ensure we retain the blank line above.