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++ Undocumented Alias(E)
148 -print-missing-file-dependencies
149 C ObjC C++ ObjC++ Alias(MG)
152 C ObjC C++ ObjC++ Alias(H)
155 Driver Alias(traditional)
158 C ObjC C++ ObjC++ Alias(traditional-cpp)
161 C ObjC C++ ObjC++ Alias(trigraphs)
164 C ObjC C++ ObjC++ Separate Alias(U) MissingArgError(macro name missing after %qs)
167 C ObjC C++ ObjC++ Joined Alias(U) MissingArgError(macro name missing after %qs)
170 C ObjC C++ ObjC++ Alias(MM)
173 Common C ObjC C++ ObjC++ Alias(v)
176 C ObjC C++ ObjC++ NoDriverArg Separate Alias(MD) MissingArgError(missing filename after %qs)
178 -write-user-dependencies
179 C ObjC C++ ObjC++ NoDriverArg Separate Alias(MMD) MissingArgError(missing filename after %qs)
182 C ObjC C++ ObjC++ Joined Separate MissingArgError(assertion missing after %qs)
183 -A<question>=<answer> Assert the <answer> to <question>. Putting '-' before <question> disables the <answer> to <question>
187 Do not discard comments
191 Do not discard comments in macro expansions
194 C ObjC C++ ObjC++ Joined Separate MissingArgError(macro name missing after %qs)
195 -D<macro>[=<val>] Define a <macro> with <val> as its value. If just <macro> is given, <val> is taken to be 1
198 C ObjC C++ ObjC++ Undocumented Var(flag_preprocess_only)
201 Driver C ObjC C++ ObjC++ Joined Separate MissingArgError(missing path after %qs)
202 -F <dir> Add <dir> to the end of the main framework include path
206 Print the name of header files as they are used
209 C ObjC C++ ObjC++ Joined Separate MissingArgError(missing path after %qs)
210 -I <dir> Add <dir> to the end of the main include path
214 Generate make dependencies
217 C ObjC C++ ObjC++ NoDriverArg Separate MissingArgError(missing filename after %qs)
218 Generate make dependencies and compile
221 C ObjC C++ ObjC++ Joined Separate MissingArgError(missing filename after %qs)
222 -MF <file> Write dependency output to the given file
226 Treat missing header files as generated files
230 Like -M but ignore system header files
233 C ObjC C++ ObjC++ NoDriverArg Separate MissingArgError(missing filename after %qs)
234 Like -MD but ignore system header files
238 Generate phony targets for all headers
241 C ObjC C++ ObjC++ Joined Separate MissingArgError(missing makefile target after %qs)
242 -MQ <target> Add a MAKE-quoted target
245 C ObjC C++ ObjC++ Joined Separate MissingArgError(missing makefile target after %qs)
246 -MT <target> Add an unquoted target
250 Do not generate #line directives
253 C ObjC C++ ObjC++ Joined Separate MissingArgError(macro name missing after %qs)
254 -U<macro> Undefine <macro>
257 C ObjC C++ ObjC++ LTO Var(warn_abi) Warning
258 Warn about things that will change when compiling with an ABI-compliant compiler
261 C ObjC C++ ObjC++ LTO Var(warn_psabi) Init(1) Undocumented
264 C ObjC C++ ObjC++ Var(warn_address) Warning
265 Warn about suspicious uses of memory addresses
268 C ObjC C++ ObjC++ Warning
269 Enable most warning messages
272 ObjC ObjC++ Var(warn_assign_intercept) Warning
273 Warn whenever an Objective-C assignment is being intercepted by the garbage collector
276 C ObjC Var(warn_bad_function_cast) Warning
277 Warn about casting functions to incompatible types
279 Wbuiltin-macro-redefined
280 C ObjC C++ ObjC++ Warning
281 Warn when a built-in preprocessor macro is undefined or redefined
284 C ObjC Var(warn_cxx_compat) Warning
285 Warn about C constructs that are not in the common subset of C and C++
288 C++ ObjC++ Var(warn_cxx0x_compat) Warning LangEnabledBy(C++ ObjC++,Wall)
289 Deprecated in favor of -Wc++11-compat
292 C++ ObjC++ Warning Alias(Wc++0x-compat)
293 Warn about C++ constructs whose meaning differs between ISO C++ 1998 and ISO C++ 2011
296 C ObjC C++ ObjC++ Var(warn_cast_qual) Warning
297 Warn about casts which discard qualifiers
300 C ObjC C++ ObjC++ Var(warn_char_subscripts) Warning
301 Warn about subscripts whose type is \"char\"
304 C ObjC C++ ObjC++ Var(warn_clobbered) Warning EnabledBy(Wextra)
305 Warn about variables that might be changed by \"longjmp\" or \"vfork\"
308 C ObjC C++ ObjC++ Warning
309 Warn about possibly nested block comments, and C++ comments spanning more than one physical line
312 C ObjC C++ ObjC++ Warning Alias(Wcomment)
313 Synonym for -Wcomment
316 C ObjC C++ ObjC++ Var(warn_conversion) Warning
317 Warn for implicit type conversions that may change a value
320 C++ ObjC++ Var(warn_conversion_null) Init(1) Warning
321 Warn for converting NULL from/to a non-pointer type
324 C ObjC C++ ObjC++ Var(warn_sign_conversion) Init(-1)
325 Warn for implicit type conversions between signed and unsigned integers
328 C++ ObjC++ Var(warn_ctor_dtor_privacy) Warning
329 Warn when all constructors and destructors are private
331 Wdeclaration-after-statement
332 C ObjC Var(warn_declaration_after_statement) Warning
333 Warn when a declaration is found after a statement
335 Wdelete-non-virtual-dtor
336 C++ ObjC++ Var(warn_delnonvdtor) Warning LangEnabledBy(C++ ObjC++,Wall)
337 Warn about deleting polymorphic objects with non-virtual destructors
340 C C++ ObjC ObjC++ Var(warn_deprecated) Init(1) Warning
341 Warn if a deprecated compiler feature, class, method, or field is used
344 C ObjC C++ ObjC++ Var(warn_div_by_zero) Init(1) Warning
345 Warn about compile-time integer division by zero
348 C++ ObjC++ Var(warn_ecpp) Warning
349 Warn about violations of Effective C++ style rules
352 C ObjC C++ ObjC++ Var(warn_empty_body) Warning EnabledBy(Wextra)
353 Warn about an empty body in an if or else statement
356 C ObjC C++ ObjC++ Warning
357 Warn about stray tokens after #elif and #endif
360 C ObjC C++ ObjC++ Var(warn_enum_compare) Init(-1) Warning
361 Warn about comparison of different enum types
365 ; Documented in common.opt
367 Werror-implicit-function-declaration
368 C ObjC RejectNegative Warning Alias(Werror=, implicit-function-declaration)
369 This switch is deprecated; use -Werror=implicit-function-declaration instead
372 C ObjC C++ ObjC++ Var(warn_float_equal) Warning
373 Warn if testing floating point numbers for equality
376 C ObjC C++ ObjC++ Warning
377 Warn about printf/scanf/strftime/strfmon format string anomalies
380 C ObjC C++ ObjC++ Var(warn_format_extra_args) Warning
381 Warn if passing too many arguments to a function for its format string
384 C ObjC C++ ObjC++ Var(warn_format_nonliteral) Warning
385 Warn about format strings that are not literals
388 C ObjC C++ ObjC++ Var(warn_format_contains_nul) Warning
389 Warn about format strings that contain NUL bytes
392 C ObjC C++ ObjC++ Var(warn_format_security) Warning
393 Warn about possible security problems with format functions
396 C ObjC C++ ObjC++ Var(warn_format_y2k) Warning
397 Warn about strftime formats yielding 2-digit years
400 C ObjC C++ ObjC++ Var(warn_format_zero_length) Warning
401 Warn about zero-length formats
404 C ObjC C++ ObjC++ Joined Warning
407 C C++ Var(warn_ignored_qualifiers) Warning EnabledBy(Wextra)
408 Warn whenever type qualifiers are ignored.
411 C ObjC C++ ObjC++ Var(warn_init_self) Warning
412 Warn about variables which are initialized to themselves
415 C ObjC Var(warn_implicit) Init(-1) Warning
416 Warn about implicit declarations
419 C ObjC C++ ObjC++ Var(warn_double_promotion) Warning
420 Warn about implicit conversions from \"float\" to \"double\"
422 Wimplicit-function-declaration
423 C ObjC Var(warn_implicit_function_declaration) Init(-1) Warning
424 Warn about implicit function declarations
427 C ObjC Var(warn_implicit_int) Init(-1) Warning
428 Warn when a declaration does not specify a type
431 C ObjC C++ ObjC++ Undocumented Ignore
434 C ObjC C++ ObjC++ Var(warn_int_to_pointer_cast) Init(1) Warning
435 Warn when there is a cast to a pointer from an integer of a different size
438 C++ ObjC++ Var(warn_invalid_offsetof) Init(1) Warning
439 Warn about invalid uses of the \"offsetof\" macro
442 C ObjC C++ ObjC++ Warning
443 Warn about PCH files that are found but not used
446 C ObjC Var(warn_jump_misses_init) Warning LangEnabledby(C ObjC,Wc++-compat)
447 Warn when a jump misses a variable initialization
451 Warn when a string or character literal is followed by a ud-suffix which does not begin with an underscore.
454 C ObjC C++ ObjC++ Var(warn_logical_op) Init(0) Warning
455 Warn when a logical operator is suspiciously always evaluating to true or false
458 C ObjC C++ ObjC++ Var(warn_long_long) Init(-1) Warning
459 Do not warn about using \"long long\" when -pedantic
462 C ObjC C++ ObjC++ Var(warn_main) Init(-1) Warning
463 Warn about suspicious declarations of \"main\"
466 C ObjC C++ ObjC++ Var(warn_missing_braces) Warning LangEnabledBy(C ObjC,Wall)
467 Warn about possibly missing braces around initializers
469 Wmissing-declarations
470 C ObjC C++ ObjC++ Var(warn_missing_declarations) Warning
471 Warn about global functions without previous declarations
473 Wmissing-field-initializers
474 C ObjC C++ ObjC++ Var(warn_missing_field_initializers) Warning EnabledBy(Wextra)
475 Warn about missing fields in struct initializers
477 Wsuggest-attribute=format
478 C ObjC C++ ObjC++ Var(warn_suggest_attribute_format) Warning
479 Warn about functions which might be candidates for format attributes
481 Wmissing-format-attribute
482 C ObjC C++ ObjC++ Alias(Wsuggest-attribute=format)
485 Wmissing-include-dirs
486 C ObjC C++ ObjC++ Warning
487 Warn about user-specified include directories that do not exist
489 Wmissing-parameter-type
490 C ObjC Var(warn_missing_parameter_type) Warning EnabledBy(Wextra)
491 Warn about function parameters declared without a type specifier in K&R-style functions
494 C ObjC Var(warn_missing_prototypes) Warning
495 Warn about global functions without prototypes
498 C ObjC C++ ObjC++ Var(warn_mudflap) Init(1) Warning
499 Warn about constructs not instrumented by -fmudflap
502 C ObjC C++ ObjC++ Warning
503 Warn about use of multi-character character constants
506 C ObjC C++ ObjC++ Warning Var(warn_narrowing) Init(-1)
507 Warn about narrowing conversions within { } that are ill-formed in C++11
510 C ObjC Var(warn_nested_externs) Warning
511 Warn about \"extern\" declarations not at file scope
514 C++ ObjC++ Var(warn_noexcept) Warning
515 Warn when a noexcept expression evaluates to false even though the expression can't actually throw
518 C++ ObjC++ Var(warn_nontemplate_friend) Init(1) Warning
519 Warn when non-templatized friend functions are declared within a template
522 C++ ObjC++ Var(warn_nonvdtor) Warning
523 Warn about non-virtual destructors
526 C ObjC C++ ObjC++ Var(warn_nonnull) Warning
527 Warn about NULL being passed to argument slots marked as requiring non-NULL
530 C ObjC C++ ObjC++ Joined Warning
531 -Wnormalized=<id|nfc|nfkc> Warn about non-normalised Unicode strings
534 C++ ObjC++ Var(warn_old_style_cast) Warning
535 Warn if a C-style cast is used in a program
537 Wold-style-declaration
538 C ObjC Var(warn_old_style_declaration) Warning EnabledBy(Wextra)
539 Warn for obsolescent usage in a declaration
541 Wold-style-definition
542 C ObjC Var(warn_old_style_definition) Warning
543 Warn if an old-style parameter definition is used
546 C ObjC C++ ObjC++ Var(warn_overlength_strings) Init(-1) Warning
547 Warn if a string is longer than the maximum portable length specified by the standard
550 C++ ObjC++ Var(warn_overloaded_virtual) Warning
551 Warn about overloaded virtual function names
554 C ObjC Var(warn_override_init) Warning EnabledBy(Wextra)
555 Warn about overriding initializers without side effects
557 Wpacked-bitfield-compat
558 C ObjC C++ ObjC++ Var(warn_packed_bitfield_compat) Init(-1) Warning
559 Warn about packed bit-fields whose offset changed in GCC 4.4
562 C ObjC C++ ObjC++ Var(warn_parentheses) Warning
563 Warn about possibly missing parentheses
566 C ObjC C++ ObjC++ Warning
567 ; Documented in common.opt
570 C++ ObjC++ Var(warn_pmf2ptr) Init(1) Warning
571 Warn when converting the type of pointers to member functions
574 C ObjC C++ ObjC++ Var(warn_pointer_arith) Warning
575 Warn about function pointer arithmetic
578 C ObjC Var(warn_pointer_to_int_cast) Init(1) Warning
579 Warn when a pointer is cast to an integer of a different size
582 C ObjC C++ ObjC++ Var(warn_pragmas) Init(1) Warning
583 Warn about misuses of pragmas
585 Wproperty-assign-default
586 ObjC ObjC++ Var(warn_property_assign_default) Init(1) Warning
587 Warn if a property for an Objective-C object has no assign semantics specified
590 ObjC ObjC++ Var(warn_protocol) Init(1) Warning
591 Warn if inherited methods are unimplemented
594 C ObjC C++ ObjC++ Var(warn_redundant_decls) Warning
595 Warn about multiple declarations of the same object
598 C++ ObjC++ Var(warn_reorder) Warning LangEnabledBy(C++ ObjC++,Wall)
599 Warn when the compiler reorders code
602 C ObjC C++ ObjC++ Var(warn_return_type) Warning
603 Warn whenever a function's return type defaults to \"int\" (C), or about inconsistent return types (C++)
606 ObjC ObjC++ Var(warn_selector) Warning
607 Warn if a selector has multiple methods
610 C ObjC C++ ObjC++ Var(warn_sequence_point) Warning
611 Warn about possible violations of sequence point rules
614 C ObjC C++ ObjC++ Var(warn_sign_compare) Init(-1) Warning
615 Warn about signed-unsigned comparisons
618 C++ ObjC++ Var(warn_sign_promo) Warning
619 Warn when overload promotes from unsigned to signed
621 Wstrict-null-sentinel
622 C++ ObjC++ Warning Var(warn_strict_null_sentinel)
623 Warn about uncasted NULL used as sentinel
626 C ObjC Var(warn_strict_prototypes) Warning
627 Warn about unprototyped function declarations
629 Wstrict-selector-match
630 ObjC ObjC++ Var(warn_strict_selector_match) Warning
631 Warn if type signatures of candidate methods do not match exactly
634 C C++ Var(warn_sync_nand) Init(1) Warning
635 Warn when __sync_fetch_and_nand and __sync_nand_and_fetch built-in functions are used
638 C++ ObjC++ Var(warn_synth) Warning
639 Deprecated. This switch has no effect
642 C ObjC C++ ObjC++ Warning
643 ; Documented in common.opt
646 C ObjC Var(warn_traditional) Warning
647 Warn about features not present in traditional C
649 Wtraditional-conversion
650 C ObjC Var(warn_traditional_conversion) Warning
651 Warn of prototypes causing type conversions different from what would happen in the absence of prototype
654 C ObjC C++ ObjC++ Warning
655 Warn if trigraphs are encountered that might affect the meaning of the program
658 ObjC ObjC++ Var(warn_undeclared_selector) Warning
659 Warn about @selector()s without previously declared methods
662 C ObjC C++ ObjC++ Warning
663 Warn if an undefined macro is used in an #if directive
666 C ObjC C++ ObjC++ Warning
667 Warn about unrecognized pragmas
669 Wunsuffixed-float-constants
670 C ObjC Var(warn_unsuffixed_float_constants) Warning
671 Warn about unsuffixed float constants
673 Wunused-local-typedefs
674 C ObjC C++ ObjC++ Var(warn_unused_local_typedefs) Warning EnabledBy(Wunused)
675 Warn when typedefs locally defined in a function are not used
678 C ObjC C++ ObjC++ Warning
679 Warn about macros defined in the main file that are not used
682 C ObjC C++ ObjC++ Var(warn_unused_result) Init(1) Warning
683 Warn if a caller of a function, marked with attribute warn_unused_result, does not use its return value
686 C ObjC C++ ObjC++ Warning
687 Do not warn about using variadic macros when -pedantic
690 C ObjC C++ ObjC++ Warning Var(warn_varargs) Init(1)
691 Warn about questionable usage of the macros used to retrieve variable arguments
694 C ObjC C++ ObjC++ Var(warn_vla) Init(-1) Warning
695 Warn if a variable length array is used
697 Wvolatile-register-var
698 C ObjC C++ ObjC++ Var(warn_volatile_register_var) Warning
699 Warn when a register variable is declared volatile
702 C ObjC C++ ObjC++ Var(warn_write_strings) Warning
703 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.
706 C ObjC Var(warn_pointer_sign) Init(-1) Warning
707 Warn when a pointer differs in signedness in an assignment
709 Wzero-as-null-pointer-constant
710 C++ ObjC++ Var(warn_zero_as_null_pointer_constant) Warning
711 Warn when a literal '0' is used as null pointer
714 C++ ObjC++ Var(warn_useless_cast) Warning
715 Warn about useless casts
719 A synonym for -std=c89 (for C) or -std=c++98 (for C++)
722 C ObjC C++ ObjC++ Joined
723 ; Documented in common.opt. FIXME - what about -dI, -dD, -dN and -dD?
726 C++ ObjC++ Var(flag_access_control) Init(1)
727 Enforce class member access control semantics
730 C++ ObjC++ Ignore Warn(switch %qs is no longer supported)
732 fallow-parameterless-variadic-functions
733 C ObjC Var(flag_allow_parameterless_variadic_functions)
734 Allow variadic functions without named parameter
736 falt-external-templates
737 C++ ObjC++ Ignore Warn(switch %qs is no longer supported)
741 C ObjC C++ ObjC++ Var(flag_no_asm, 0)
742 Recognize the \"asm\" keyword
744 ; Define extra predefined macros for use in libgcc.
746 C ObjC C++ ObjC++ Undocumented Var(flag_building_libgcc)
749 C ObjC C++ ObjC++ Var(flag_no_builtin, 0)
750 Recognize built-in functions
753 C ObjC C++ ObjC++ Joined
756 C++ ObjC++ Var(flag_check_new)
757 Check the return value of new
761 Allow the arguments of the '?' operator to have different types
764 C++ ObjC++ Var(flag_conserve_space)
765 Reduce the size of object files
767 fconstant-string-class=
768 ObjC ObjC++ Joined MissingArgError(no class name specified with %qs)
769 -fconst-string-class=<name> Use class <name> for constant strings
772 C++ ObjC++ Joined RejectNegative UInteger Var(max_constexpr_depth) Init(512)
773 -fconstexpr-depth=<number> Specify maximum constexpr recursion depth
777 Emit debug annotations during preprocessing
780 C++ ObjC++ Var(flag_deduce_init_list) Init(0)
781 -fdeduce-init-list enable deduction of std::initializer_list for a template type parameter from a brace-enclosed initializer-list
785 Does nothing. Preserved for backward compatibility.
789 Preprocess directives only.
791 fdollars-in-identifiers
793 Permit '$' as an identifier character
796 C++ ObjC++ Var(flag_elide_constructors) Init(1)
799 C++ ObjC++ Var(flag_enforce_eh_specs) Init(1)
800 Generate code to check exception specifications
803 C++ ObjC++ Ignore Warn(switch %qs is no longer supported)
806 C ObjC C++ ObjC++ Joined RejectNegative
807 -fexec-charset=<cset> Convert all strings and character constants to character set <cset>
809 fextended-identifiers
811 Permit universal character names (\\u and \\U) in identifiers
814 C ObjC C++ ObjC++ Joined RejectNegative
815 -finput-charset=<cset> Specify the default character set for source files
819 C++ ObjC++ Ignore Warn(switch %qs is no longer supported)
822 C++ ObjC++ Var(flag_new_for_scope) Init(1)
823 Scope of for-init-statement variables is local to the loop
827 Do not assume that standard C libraries and \"main\" exist
830 C++ ObjC++ Var(flag_no_gnu_keywords, 0)
831 Recognize GNU-defined keywords
834 ObjC ObjC++ Report RejectNegative Var(flag_next_runtime,0) Init(NEXT_OBJC_RUNTIME)
835 Generate code for GNU runtime environment
838 C ObjC Var(flag_gnu89_inline) Init(-1)
839 Use traditional GNU semantics for inline functions
842 C++ ObjC++ Ignore Warn(switch %qs is no longer supported)
845 C++ ObjC++ Optimization Alias(fexceptions) Warn({-fhandle-exceptions has been renamed -fexceptions (and is now on by default)})
848 C++ ObjC++ Ignore Warn(switch %qs is no longer supported)
852 Assume normal C execution environment
855 C++ ObjC++ Ignore Warn(switch %qs is no longer supported)
859 C++ ObjC++ Var(flag_implement_inlines) Init(1)
860 Export functions even if they can be inlined
862 fimplicit-inline-templates
863 C++ ObjC++ Var(flag_implicit_inline_templates) Init(1)
864 Emit implicit instantiations of inline templates
867 C++ ObjC++ Var(flag_implicit_templates) Init(1)
868 Emit implicit instantiations of templates
871 C++ ObjC++ Var(flag_friend_injection)
872 Inject friend functions into enclosing namespace
874 fkeep-inline-dllexport
875 C C++ ObjC ObjC++ Var(flag_keep_inline_dllexport) Init(1) Report Condition(TARGET_DLLIMPORT_DECL_ATTRIBUTES)
876 Don't emit dllexported inline functions unless needed
879 C++ ObjC++ Ignore Warn(switch %qs is no longer supported)
881 flax-vector-conversions
882 C ObjC C++ ObjC++ Var(flag_lax_vector_conversions)
883 Allow implicit conversions between vectors with differing numbers of subparts and/or differing element types.
886 C ObjC C++ ObjC++ Var(flag_ms_extensions)
887 Don't warn about uses of Microsoft extensions
890 C ObjC C++ ObjC++ RejectNegative Report Var(flag_mudflap)
891 Add mudflap bounds-checking instrumentation for single-threaded program
894 C ObjC C++ ObjC++ RejectNegative Report Var(flag_mudflap,2)
895 Add mudflap bounds-checking instrumentation for multi-threaded program
898 C ObjC C++ ObjC++ RejectNegative Report Var(flag_mudflap_ignore_reads)
899 Ignore read operations when inserting mudflap instrumentation
901 fname-mangling-version-
902 C++ ObjC++ Joined Ignore Warn(switch %qs is no longer supported)
905 C++ ObjC++ Ignore Warn(switch %qs is no longer supported)
908 ObjC ObjC++ Report RejectNegative Var(flag_next_runtime)
909 Generate code for NeXT (Apple Mac OS X) runtime environment
912 ObjC ObjC++ Var(flag_nil_receivers) Init(1)
913 Assume that receivers of Objective-C messages may be nil
916 C++ ObjC++ Var(flag_no_nonansi_builtin, 0)
919 C++ ObjC++ Ignore Warn(switch %qs is no longer supported)
922 C++ ObjC++ Optimization Var(flag_nothrow_opt)
923 Treat a throw() exception specification as noexcept to improve code size
926 ObjC ObjC++ Joined Report RejectNegative UInteger Var(flag_objc_abi)
927 Specify which ABI to use for Objective-C family code and meta-data generation.
929 ; Generate special '- .cxx_construct' and '- .cxx_destruct' methods
930 ; to initialize any non-POD ivars in Objective-C++ classes.
931 fobjc-call-cxx-cdtors
932 ObjC++ Var(flag_objc_call_cxx_cdtors)
933 Generate special Objective-C methods to initialize/destroy non-POD C++ ivars, if needed
935 fobjc-direct-dispatch
936 ObjC ObjC++ Var(flag_objc_direct_dispatch)
937 Allow fast jumps to the message dispatcher
939 ; Nonzero means that we will allow new ObjC exception syntax (@throw,
940 ; @try, etc.) in source code.
942 ObjC ObjC++ Var(flag_objc_exceptions)
943 Enable Objective-C exception and synchronization syntax
946 ObjC ObjC++ Var(flag_objc_gc)
947 Enable garbage collection (GC) in Objective-C/Objective-C++ programs
950 ObjC ObjC++ Var(flag_objc_nilcheck,1)
951 Enable inline checks for nil receivers with the NeXT runtime and ABI version 2.
953 ; Nonzero means that we generate NeXT setjmp based exceptions.
954 fobjc-sjlj-exceptions
955 ObjC ObjC++ Var(flag_objc_sjlj_exceptions) Init(-1)
956 Enable Objective-C setjmp exception handling runtime
959 ObjC ObjC++ Var(flag_objc1_only)
960 Conform to the Objective-C 1.0 language as implemented in GCC 4.0
963 C ObjC C++ ObjC++ Var(flag_openmp)
964 Enable OpenMP (implies -frecursive in Fortran)
968 Recognize C++ keywords like \"compl\" and \"xor\"
972 Does nothing. Preserved for backward compatibility.
979 Look for and use PCH files even when preprocessing
982 C++ ObjC++ Var(flag_permissive)
983 Downgrade conformance errors to warnings
986 C ObjC Var(flag_plan9_extensions)
987 Enable Plan 9 language extensions
991 Treat the input file as already preprocessed
993 ftrack-macro-expansion
994 C ObjC C++ ObjC++ JoinedOrMissing RejectNegative UInteger
995 ; converted into ftrack-macro-expansion=
997 ftrack-macro-expansion=
998 C ObjC C++ ObjC++ JoinedOrMissing RejectNegative UInteger
999 -ftrack-macro-expansion=<0|1|2> Track locations of tokens coming from macro expansion and display them in error messages
1002 C++ ObjC++ Var(flag_pretty_templates) Init(1)
1003 -fno-pretty-templates Do not pretty-print template specializations as the template signature followed by the arguments
1005 freplace-objc-classes
1006 ObjC ObjC++ Var(flag_replace_objc_classes)
1007 Used in Fix-and-Continue mode to indicate that object files may be swapped in at runtime
1011 Enable automatic template instantiation
1014 C++ ObjC++ Optimization Var(flag_rtti) Init(1)
1015 Generate run time type descriptor information
1018 C ObjC C++ ObjC++ Optimization Var(flag_short_double)
1019 Use the same size for double as for float
1022 C ObjC C++ ObjC++ Optimization Var(flag_short_enums)
1023 Use the narrowest integer type possible for enumeration types
1026 C ObjC C++ ObjC++ Optimization Var(flag_short_wchar)
1027 Force the underlying type for \"wchar_t\" to be \"unsigned short\"
1030 C ObjC C++ ObjC++ Var(flag_signed_bitfields) Init(1)
1031 When \"signed\" or \"unsigned\" is not given make the bitfield signed
1034 C ObjC C++ ObjC++ LTO Var(flag_signed_char)
1035 Make \"char\" signed by default
1038 C++ ObjC++ Ignore Warn(switch %qs is no longer supported)
1041 C++ ObjC++ Var(flag_detailed_statistics)
1042 Display statistics accumulated during compilation
1045 C++ ObjC++ Optimization Var(flag_strict_enums)
1046 Assume that values of enumeration type are always within the minimum range of that type
1049 C++ ObjC++ Ignore Warn(switch %qs is no longer supported)
1052 C ObjC C++ ObjC++ Joined RejectNegative UInteger
1053 -ftabstop=<number> Distance between tab stops for column reporting
1055 ftemplate-backtrace-limit=
1056 C++ ObjC++ Joined RejectNegative UInteger Var(template_backtrace_limit) Init(10)
1057 Set the maximum number of template instantiation notes for a single warning or error
1060 C++ ObjC++ Joined RejectNegative Undocumented Alias(ftemplate-depth=)
1063 C++ ObjC++ Joined RejectNegative UInteger
1064 -ftemplate-depth=<number> Specify maximum template instantiation depth
1067 C++ ObjC++ Ignore Warn(switch %qs is no longer supported)
1070 C++ ObjC++ Optimization Var(flag_threadsafe_statics) Init(1)
1071 -fno-threadsafe-statics Do not generate thread-safe code for initializing local statics
1074 C ObjC C++ ObjC++ Var(flag_signed_bitfields, 0)
1075 When \"signed\" or \"unsigned\" is not given make the bitfield unsigned
1078 C ObjC C++ ObjC++ LTO Var(flag_signed_char, 0)
1079 Make \"char\" unsigned by default
1082 C++ ObjC++ Var(flag_use_cxa_atexit) Init(DEFAULT_USE_CXA_ATEXIT)
1083 Use __cxa_atexit to register destructors
1085 fuse-cxa-get-exception-ptr
1086 C++ ObjC++ Var(flag_use_cxa_get_exception_ptr) Init(2)
1087 Use __cxa_get_exception_ptr in exception handling
1089 fvisibility-inlines-hidden
1091 Marks all inlined functions and methods as having hidden visibility
1093 fvisibility-ms-compat
1094 C++ ObjC++ Var(flag_visibility_ms_compat)
1095 Changes visibility to match Microsoft Visual Studio by default
1098 C++ ObjC++ Ignore Warn(switch %qs is no longer supported)
1102 C++ ObjC++ Ignore Warn(switch %qs is no longer supported)
1106 C++ ObjC++ Var(flag_weak) Init(1)
1107 Emit common-like symbols as weak symbols
1110 C ObjC C++ ObjC++ Joined RejectNegative
1111 -fwide-exec-charset=<cset> Convert all wide strings and character constants to character set <cset>
1114 C ObjC C++ ObjC++ Var(flag_working_directory) Init(-1)
1115 Generate a #line directive pointing at the current working directory
1118 C++ ObjC++ Ignore Warn(switch %qs is no longer supported)
1122 ObjC ObjC++ Var(flag_zero_link)
1123 Generate lazy class lookup (via objc_getClass()) for use in Zero-Link mode
1126 ObjC ObjC++ Var(flag_gen_declaration)
1127 Dump declarations to a .decl file
1129 femit-struct-debug-baseonly
1131 -femit-struct-debug-baseonly Aggressive reduced debug info for structs
1133 femit-struct-debug-reduced
1135 -femit-struct-debug-reduced Conservative reduced debug info for structs
1137 femit-struct-debug-detailed=
1138 C ObjC C++ ObjC++ Joined
1139 -femit-struct-debug-detailed=<spec-list> Detailed reduced debug info for structs
1142 C ObjC C++ ObjC++ Joined Separate MissingArgError(missing path after %qs)
1143 -idirafter <dir> Add <dir> to the end of the system include path
1146 C ObjC C++ ObjC++ Joined Separate MissingArgError(missing filename after %qs)
1147 -imacros <file> Accept definition of macros in <file>
1150 C ObjC C++ ObjC++ Joined Separate
1151 -imultilib <dir> Set <dir> to be the multilib include subdirectory
1154 C ObjC C++ ObjC++ Joined Separate MissingArgError(missing filename after %qs)
1155 -include <file> Include the contents of <file> before other files
1158 C ObjC C++ ObjC++ Joined Separate
1159 -iprefix <path> Specify <path> as a prefix for next two options
1162 C ObjC C++ ObjC++ Joined Separate MissingArgError(missing path after %qs)
1163 -isysroot <dir> Set <dir> to be the system root directory
1166 C ObjC C++ ObjC++ Joined Separate MissingArgError(missing path after %qs)
1167 -isystem <dir> Add <dir> to the start of the system include path
1170 C ObjC C++ ObjC++ Joined Separate MissingArgError(missing path after %qs)
1171 -iquote <dir> Add <dir> to the end of the quote include path
1174 C ObjC C++ ObjC++ Joined Separate
1175 -iwithprefix <dir> Add <dir> to the end of the system include path
1178 C ObjC C++ ObjC++ Joined Separate
1179 -iwithprefixbefore <dir> Add <dir> to the end of the main include path
1182 C Undocumented RejectDriver
1189 Do not search standard system include directories (those specified with -isystem will still be used)
1193 Do not search standard system include directories for C++
1196 C ObjC C++ ObjC++ Joined Separate
1197 ; Documented in common.opt
1200 C ObjC C++ ObjC++ Alias(Wpedantic)
1201 ; Documented in common.opt
1203 print-objc-runtime-info
1205 Generate C header of platform-specific features
1209 Remap file names when including files
1213 Conform to the ISO 1998 C++ standard revised by the 2003 technical corrigendum
1216 C++ ObjC++ Alias(std=c++98)
1217 Conform to the ISO 1998 C++ standard revised by the 2003 technical corrigendum
1221 Conform to the ISO 2011 C++ standard (experimental and incomplete support)
1224 C++ ObjC++ Alias(std=c++11)
1225 Deprecated in favor of -std=c++11
1229 Conform to the ISO 201y(7?) C++ draft standard (experimental and incomplete support)
1233 Conform to the ISO 2011 C standard (experimental and incomplete support)
1236 C ObjC Alias(std=c11)
1237 Deprecated in favor of -std=c11
1240 C ObjC Alias(std=c90)
1241 Conform to the ISO 1990 C standard
1245 Conform to the ISO 1990 C standard
1249 Conform to the ISO 1999 C standard
1252 C ObjC Alias(std=c99)
1253 Deprecated in favor of -std=c99
1257 Conform to the ISO 1998 C++ standard revised by the 2003 technical
1258 corrigendum with GNU extensions
1261 C++ ObjC++ Alias(std=gnu++98)
1262 Conform to the ISO 1998 C++ standard revised by the 2003 technical
1263 corrigendum with GNU extensions
1267 Conform to the ISO 2011 C++ standard with GNU extensions (experimental and incomplete support)
1270 C++ ObjC++ Alias(std=gnu++11)
1271 Deprecated in favor of -std=gnu++11
1275 Conform to the ISO 201y(7?) C++ draft standard with GNU extensions (experimental and incomplete support)
1279 Conform to the ISO 2011 C standard with GNU extensions (experimental and incomplete support)
1282 C ObjC Alias(std=gnu11)
1283 Deprecated in favor of -std=gnu11
1286 C ObjC Alias(std=gnu90)
1287 Conform to the ISO 1990 C standard with GNU extensions
1291 Conform to the ISO 1990 C standard with GNU extensions
1295 Conform to the ISO 1999 C standard with GNU extensions
1298 C ObjC Alias(std=gnu99)
1299 Deprecated in favor of -std=gnu99
1302 C ObjC Alias(std=c90)
1303 Conform to the ISO 1990 C standard
1307 Conform to the ISO 1990 C standard as amended in 1994
1310 C ObjC Alias(std=c99)
1311 Conform to the ISO 1999 C standard
1314 C ObjC Alias(std=c99)
1315 Deprecated in favor of -std=iso9899:1999
1318 C ObjC Alias(std=c11)
1319 Conform to the ISO 2011 C standard (experimental and incomplete support)
1326 Enable traditional preprocessing
1330 -trigraphs Support ISO C trigraphs
1333 C ObjC C++ ObjC++ Var(flag_undef)
1334 Do not predefine system-specific and GCC-specific macros
1338 ; Documented in common.opt
1342 ; Documented in common.opt
1344 ; This comment is to ensure we retain the blank line above.