1 ; Options for the C, ObjC, C++ and ObjC++ front ends.
2 ; Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010
3 ; 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++ Joined Separate
41 C ObjC C++ ObjC++ Joined Separate MissingArgError(assertion missing after %qs)
42 -A<question>=<answer> Assert the <answer> to <question>. Putting '-' before <question> disables the <answer> to <question>
46 Do not discard comments
50 Do not discard comments in macro expansions
53 C ObjC C++ ObjC++ Joined Separate MissingArgError(macro name missing after %qs)
54 -D<macro>[=<val>] Define a <macro> with <val> as its value. If just <macro> is given, <val> is taken to be 1
57 C ObjC C++ ObjC++ Undocumented Var(flag_preprocess_only)
60 C ObjC C++ ObjC++ Joined Separate MissingArgError(missing path after %qs)
61 -F <dir> Add <dir> to the end of the main framework include path
65 Print the name of header files as they are used
68 C ObjC C++ ObjC++ Joined Separate MissingArgError(missing path after %qs)
69 -I <dir> Add <dir> to the end of the main include path
73 Generate make dependencies
76 C ObjC C++ ObjC++ NoDriverArg Separate MissingArgError(missing filename after %qs)
77 Generate make dependencies and compile
80 C ObjC C++ ObjC++ Joined Separate MissingArgError(missing filename after %qs)
81 -MF <file> Write dependency output to the given file
85 Treat missing header files as generated files
89 Like -M but ignore system header files
92 C ObjC C++ ObjC++ NoDriverArg Separate MissingArgError(missing filename after %qs)
93 Like -MD but ignore system header files
97 Generate phony targets for all headers
100 C ObjC C++ ObjC++ Joined Separate MissingArgError(missing makefile target after %qs)
101 -MQ <target> Add a MAKE-quoted target
104 C ObjC C++ ObjC++ Joined Separate MissingArgError(missing makefile target after %qs)
105 -MT <target> Add an unquoted target
109 Do not generate #line directives
112 C ObjC C++ ObjC++ Joined Separate MissingArgError(macro name missing after %qs)
113 -U<macro> Undefine <macro>
116 C ObjC C++ ObjC++ LTO Var(warn_abi) Warning
117 Warn about things that will change when compiling with an ABI-compliant compiler
120 C ObjC C++ ObjC++ LTO Var(warn_psabi) Init(1) Undocumented
123 C ObjC C++ ObjC++ Var(warn_address) Warning
124 Warn about suspicious uses of memory addresses
127 C ObjC C++ ObjC++ Warning
128 Enable most warning messages
131 ObjC ObjC++ Var(warn_assign_intercept) Warning
132 Warn whenever an Objective-C assignment is being intercepted by the garbage collector
135 C ObjC Var(warn_bad_function_cast) Warning
136 Warn about casting functions to incompatible types
138 Wbuiltin-macro-redefined
139 C ObjC C++ ObjC++ Warning
140 Warn when a built-in preprocessor macro is undefined or redefined
143 C ObjC Var(warn_cxx_compat) Warning
144 Warn about C constructs that are not in the common subset of C and C++
147 C++ ObjC++ Var(warn_cxx0x_compat) Warning
148 Warn about C++ constructs whose meaning differs between ISO C++ 1998 and ISO C++ 200x
151 C ObjC C++ ObjC++ Var(warn_cast_qual) Warning
152 Warn about casts which discard qualifiers
155 C ObjC C++ ObjC++ Var(warn_char_subscripts) Warning
156 Warn about subscripts whose type is \"char\"
159 C ObjC C++ ObjC++ Var(warn_clobbered) Init(-1) Warning
160 Warn about variables that might be changed by \"longjmp\" or \"vfork\"
163 C ObjC C++ ObjC++ Warning
164 Warn about possibly nested block comments, and C++ comments spanning more than one physical line
167 C ObjC C++ ObjC++ Warning Alias(Wcomment)
168 Synonym for -Wcomment
171 C ObjC C++ ObjC++ Var(warn_conversion) Warning
172 Warn for implicit type conversions that may change a value
175 C++ ObjC++ Var(warn_conversion_null) Init(1) Warning
176 Warn for converting NULL from/to a non-pointer type
179 C ObjC C++ ObjC++ Var(warn_sign_conversion) Init(-1)
180 Warn for implicit type conversions between signed and unsigned integers
183 C++ ObjC++ Var(warn_ctor_dtor_privacy) Warning
184 Warn when all constructors and destructors are private
186 Wdeclaration-after-statement
187 C ObjC Var(warn_declaration_after_statement) Warning
188 Warn when a declaration is found after a statement
191 C C++ ObjC ObjC++ Var(warn_deprecated) Init(1) Warning
192 Warn if a deprecated compiler feature, class, method, or field is used
195 C ObjC C++ ObjC++ Var(warn_div_by_zero) Init(1) Warning
196 Warn about compile-time integer division by zero
199 C++ ObjC++ Var(warn_ecpp) Warning
200 Warn about violations of Effective C++ style rules
203 C ObjC C++ ObjC++ Var(warn_empty_body) Init(-1) Warning
204 Warn about an empty body in an if or else statement
207 C ObjC C++ ObjC++ Warning
208 Warn about stray tokens after #elif and #endif
211 C ObjC C++ ObjC++ Var(warn_enum_compare) Init(-1) Warning
212 Warn about comparison of different enum types
216 ; Documented in common.opt
218 Werror-implicit-function-declaration
219 C ObjC RejectNegative Warning Alias(Werror=, implicit-function-declaration)
220 This switch is deprecated; use -Werror=implicit-function-declaration instead
223 C ObjC C++ ObjC++ Var(warn_float_equal) Warning
224 Warn if testing floating point numbers for equality
227 C ObjC C++ ObjC++ Warning
228 Warn about printf/scanf/strftime/strfmon format string anomalies
231 C ObjC C++ ObjC++ Var(warn_format_extra_args) Warning
232 Warn if passing too many arguments to a function for its format string
235 C ObjC C++ ObjC++ Var(warn_format_nonliteral) Warning
236 Warn about format strings that are not literals
239 C ObjC C++ ObjC++ Var(warn_format_contains_nul) Warning
240 Warn about format strings that contain NUL bytes
243 C ObjC C++ ObjC++ Var(warn_format_security) Warning
244 Warn about possible security problems with format functions
247 C ObjC C++ ObjC++ Var(warn_format_y2k) Warning
248 Warn about strftime formats yielding 2-digit years
251 C ObjC Var(warn_format_zero_length) Warning
252 Warn about zero-length formats
255 C ObjC C++ ObjC++ Joined Warning
258 C C++ Var(warn_ignored_qualifiers) Init(-1) Warning
259 Warn whenever type qualifiers are ignored.
262 C ObjC C++ ObjC++ Var(warn_init_self) Warning
263 Warn about variables which are initialized to themselves
266 C ObjC Var(warn_implicit) Init(-1) Warning
267 Warn about implicit declarations
270 C ObjC C++ ObjC++ Var(warn_double_promotion) Warning
271 Warn about implicit conversions from \"float\" to \"double\"
273 Wimplicit-function-declaration
274 C ObjC Var(warn_implicit_function_declaration) Init(-1) Warning
275 Warn about implicit function declarations
278 C ObjC Var(warn_implicit_int) Init(-1) Warning
279 Warn when a declaration does not specify a type
282 C ObjC C++ ObjC++ Undocumented Ignore
285 C ObjC C++ ObjC++ Var(warn_int_to_pointer_cast) Init(1) Warning
286 Warn when there is a cast to a pointer from an integer of a different size
289 C++ ObjC++ Var(warn_invalid_offsetof) Init(1) Warning
290 Warn about invalid uses of the \"offsetof\" macro
293 C ObjC C++ ObjC++ Warning
294 Warn about PCH files that are found but not used
297 C ObjC Var(warn_jump_misses_init) Init(-1) Warning
298 Warn when a jump misses a variable initialization
301 C ObjC C++ ObjC++ Var(warn_logical_op) Init(0) Warning
302 Warn when a logical operator is suspiciously always evaluating to true or false
305 C ObjC C++ ObjC++ Var(warn_long_long) Init(-1) Warning
306 Do not warn about using \"long long\" when -pedantic
309 C ObjC C++ ObjC++ Var(warn_main) Init(-1) Warning
310 Warn about suspicious declarations of \"main\"
313 C ObjC C++ ObjC++ Var(warn_missing_braces) Warning
314 Warn about possibly missing braces around initializers
316 Wmissing-declarations
317 C ObjC C++ ObjC++ Var(warn_missing_declarations) Warning
318 Warn about global functions without previous declarations
320 Wmissing-field-initializers
321 C ObjC C++ ObjC++ Var(warn_missing_field_initializers) Init(-1) Warning
322 Warn about missing fields in struct initializers
324 Wmissing-format-attribute
325 C ObjC C++ ObjC++ Var(warn_missing_format_attribute) Warning
326 Warn about functions which might be candidates for format attributes
328 Wmissing-include-dirs
329 C ObjC C++ ObjC++ Warning
330 Warn about user-specified include directories that do not exist
332 Wmissing-parameter-type
333 C ObjC Var(warn_missing_parameter_type) Init(-1) Warning
334 Warn about function parameters declared without a type specifier in K&R-style functions
337 C ObjC Var(warn_missing_prototypes) Warning
338 Warn about global functions without prototypes
341 C ObjC C++ ObjC++ Warning
342 Warn about use of multi-character character constants
345 C ObjC Var(warn_nested_externs) Warning
346 Warn about \"extern\" declarations not at file scope
349 C++ ObjC++ Var(warn_noexcept) Warning
350 Warn when a noexcept expression evaluates to false even though the expression can't actually throw
353 C++ ObjC++ Var(warn_nontemplate_friend) Init(1) Warning
354 Warn when non-templatized friend functions are declared within a template
357 C++ ObjC++ Var(warn_nonvdtor) Warning
358 Warn about non-virtual destructors
361 C ObjC Var(warn_nonnull) Warning
362 Warn about NULL being passed to argument slots marked as requiring non-NULL
365 C ObjC C++ ObjC++ Joined Warning
366 -Wnormalized=<id|nfc|nfkc> Warn about non-normalised Unicode strings
369 C++ ObjC++ Var(warn_old_style_cast) Warning
370 Warn if a C-style cast is used in a program
372 Wold-style-declaration
373 C ObjC Var(warn_old_style_declaration) Init(-1) Warning
374 Warn for obsolescent usage in a declaration
376 Wold-style-definition
377 C ObjC Var(warn_old_style_definition) Warning
378 Warn if an old-style parameter definition is used
381 C ObjC C++ ObjC++ Var(warn_overlength_strings) Init(-1) Warning
382 Warn if a string is longer than the maximum portable length specified by the standard
385 C++ ObjC++ Var(warn_overloaded_virtual) Warning
386 Warn about overloaded virtual function names
389 C ObjC Var(warn_override_init) Init(-1) Warning
390 Warn about overriding initializers without side effects
392 Wpacked-bitfield-compat
393 C ObjC C++ ObjC++ Var(warn_packed_bitfield_compat) Init(-1) Warning
394 Warn about packed bit-fields whose offset changed in GCC 4.4
397 C ObjC C++ ObjC++ Var(warn_parentheses) Warning
398 Warn about possibly missing parentheses
401 C++ ObjC++ Var(warn_pmf2ptr) Init(1) Warning
402 Warn when converting the type of pointers to member functions
405 C ObjC C++ ObjC++ Var(warn_pointer_arith) Warning
406 Warn about function pointer arithmetic
409 C ObjC Var(warn_pointer_to_int_cast) Init(1) Warning
410 Warn when a pointer is cast to an integer of a different size
413 C ObjC C++ ObjC++ Var(warn_pragmas) Init(1) Warning
414 Warn about misuses of pragmas
417 ObjC ObjC++ Var(warn_protocol) Init(1) Warning
418 Warn if inherited methods are unimplemented
421 C ObjC C++ ObjC++ Var(warn_redundant_decls) Warning
422 Warn about multiple declarations of the same object
425 C++ ObjC++ Var(warn_reorder) Warning
426 Warn when the compiler reorders code
429 C ObjC C++ ObjC++ Var(warn_return_type) Warning
430 Warn whenever a function's return type defaults to \"int\" (C), or about inconsistent return types (C++)
433 ObjC ObjC++ Var(warn_selector) Warning
434 Warn if a selector has multiple methods
437 C ObjC C++ ObjC++ Var(warn_sequence_point) Warning
438 Warn about possible violations of sequence point rules
441 C ObjC C++ ObjC++ Var(warn_sign_compare) Init(-1) Warning
442 Warn about signed-unsigned comparisons
445 C++ ObjC++ Var(warn_sign_promo) Warning
446 Warn when overload promotes from unsigned to signed
448 Wstrict-null-sentinel
449 C++ ObjC++ Warning Var(warn_strict_null_sentinel)
450 Warn about uncasted NULL used as sentinel
453 C ObjC Var(warn_strict_prototypes) Warning
454 Warn about unprototyped function declarations
456 Wstrict-selector-match
457 ObjC ObjC++ Var(warn_strict_selector_match) Warning
458 Warn if type signatures of candidate methods do not match exactly
461 C C++ Var(warn_sync_nand) Init(1) Warning
462 Warn when __sync_fetch_and_nand and __sync_nand_and_fetch built-in functions are used
465 C++ ObjC++ Var(warn_synth) Warning
466 Deprecated. This switch has no effect
469 C ObjC C++ ObjC++ Warning
470 ; Documented in common.opt
473 C ObjC Var(warn_traditional) Warning
474 Warn about features not present in traditional C
476 Wtraditional-conversion
477 C ObjC Var(warn_traditional_conversion) Warning
478 Warn of prototypes causing type conversions different from what would happen in the absence of prototype
481 C ObjC C++ ObjC++ Warning
482 Warn if trigraphs are encountered that might affect the meaning of the program
485 ObjC ObjC++ Var(warn_undeclared_selector) Warning
486 Warn about @selector()s without previously declared methods
489 C ObjC C++ ObjC++ Warning
490 Warn if an undefined macro is used in an #if directive
493 C ObjC C++ ObjC++ Warning
494 Warn about unrecognized pragmas
496 Wunsuffixed-float-constants
497 C ObjC Var(warn_unsuffixed_float_constants) Warning
498 Warn about unsuffixed float constants
501 C ObjC C++ ObjC++ Warning
502 Warn about macros defined in the main file that are not used
505 C ObjC C++ ObjC++ Var(warn_unused_result) Init(1) Warning
506 Warn if a caller of a function, marked with attribute warn_unused_result, does not use its return value
509 C ObjC C++ ObjC++ Warning
510 Do not warn about using variadic macros when -pedantic
513 C ObjC C++ ObjC++ Var(warn_vla) Init(-1) Warning
514 Warn if a variable length array is used
516 Wvolatile-register-var
517 C ObjC C++ ObjC++ Var(warn_volatile_register_var) Warning
518 Warn when a register variable is declared volatile
521 C ObjC C++ ObjC++ Var(warn_write_strings) Warning
522 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.
525 C ObjC Var(warn_pointer_sign) Init(-1) Warning
526 Warn when a pointer differs in signedness in an assignment
530 A synonym for -std=c89 (for C) or -std=c++98 (for C++)
533 C ObjC C++ ObjC++ Joined
534 ; Documented in common.opt. FIXME - what about -dI, -dD, -dN and -dD?
537 C++ ObjC++ Var(flag_access_control) Init(1)
538 Enforce class member access control semantics
541 C++ ObjC++ Ignore Warn(switch %qs is no longer supported)
543 falt-external-templates
544 C++ ObjC++ Ignore Warn(switch %qs is no longer supported)
548 C ObjC C++ ObjC++ Var(flag_no_asm, 0)
549 Recognize the \"asm\" keyword
552 C ObjC C++ ObjC++ Var(flag_no_builtin, 0)
553 Recognize built-in functions
556 C ObjC C++ ObjC++ Joined
559 C++ ObjC++ Var(flag_check_new)
560 Check the return value of new
564 Allow the arguments of the '?' operator to have different types
567 C++ ObjC++ Var(flag_conserve_space)
568 Reduce the size of object files
570 fconstant-string-class=
571 ObjC ObjC++ Joined MissingArgError(no class name specified with %qs)
572 -fconst-string-class=<name> Use class <name> for constant strings
575 C++ ObjC++ Var(flag_deduce_init_list) Init(1)
576 -fno-deduce-init-list disable deduction of std::initializer_list for a template type parameter from a brace-enclosed initializer-list
580 Does nothing. Preserved for backward compatibility.
584 Preprocess directives only.
586 fdollars-in-identifiers
588 Permit '$' as an identifier character
591 C++ ObjC++ Var(flag_elide_constructors) Init(1)
594 C++ ObjC++ Var(flag_enforce_eh_specs) Init(1)
595 Generate code to check exception specifications
598 C++ ObjC++ Ignore Warn(switch %qs is no longer supported)
601 C ObjC C++ ObjC++ Joined RejectNegative
602 -fexec-charset=<cset> Convert all strings and character constants to character set <cset>
604 fextended-identifiers
606 Permit universal character names (\\u and \\U) in identifiers
609 C ObjC C++ ObjC++ Joined RejectNegative
610 -finput-charset=<cset> Specify the default character set for source files
614 C++ ObjC++ Ignore Warn(switch %qs is no longer supported)
617 C++ ObjC++ Var(flag_new_for_scope) Init(1)
618 Scope of for-init-statement variables is local to the loop
622 Do not assume that standard C libraries and \"main\" exist
625 C++ ObjC++ Var(flag_no_gnu_keywords, 0)
626 Recognize GNU-defined keywords
630 Generate code for GNU runtime environment
633 C ObjC Var(flag_gnu89_inline) Init(-1)
634 Use traditional GNU semantics for inline functions
637 C++ ObjC++ Ignore Warn(switch %qs is no longer supported)
640 C++ ObjC++ Optimization Alias(fexceptions) Warn({-fhandle-exceptions has been renamed -fexceptions (and is now on by default)})
643 C++ ObjC++ Ignore Warn(switch %qs is no longer supported)
647 Assume normal C execution environment
650 C++ ObjC++ Ignore Warn(switch %qs is no longer supported)
654 C++ ObjC++ Var(flag_implement_inlines) Init(1)
655 Export functions even if they can be inlined
657 fimplicit-inline-templates
658 C++ ObjC++ Var(flag_implicit_inline_templates) Init(1)
659 Emit implicit instantiations of inline templates
662 C++ ObjC++ Var(flag_implicit_templates) Init(1)
663 Emit implicit instantiations of templates
666 C++ ObjC++ Var(flag_friend_injection)
667 Inject friend functions into enclosing namespace
670 C++ ObjC++ Ignore Warn(switch %qs is no longer supported)
672 flax-vector-conversions
673 C ObjC C++ ObjC++ Var(flag_lax_vector_conversions)
674 Allow implicit conversions between vectors with differing numbers of subparts and/or differing element types.
677 C ObjC C++ ObjC++ Var(flag_ms_extensions)
678 Don't warn about uses of Microsoft extensions
680 fname-mangling-version-
681 C++ ObjC++ Joined Ignore Warn(switch %qs is no longer supported)
684 C++ ObjC++ Ignore Warn(switch %qs is no longer supported)
688 Generate code for NeXT (Apple Mac OS X) runtime environment
691 ObjC ObjC++ Var(flag_nil_receivers) Init(1)
692 Assume that receivers of Objective-C messages may be nil
695 C++ ObjC++ Var(flag_no_nonansi_builtin, 0)
698 C++ ObjC++ Ignore Warn(switch %qs is no longer supported)
701 C++ ObjC++ Optimization Var(flag_nothrow_opt)
702 Treat a throw() exception specification as noexcept to improve code size
704 ; Generate special '- .cxx_construct' and '- .cxx_destruct' methods
705 ; to initialize any non-POD ivars in Objective-C++ classes.
706 fobjc-call-cxx-cdtors
707 ObjC++ Var(flag_objc_call_cxx_cdtors)
708 Generate special Objective-C methods to initialize/destroy non-POD C++ ivars, if needed
710 fobjc-direct-dispatch
711 ObjC ObjC++ Var(flag_objc_direct_dispatch)
712 Allow fast jumps to the message dispatcher
714 ; Nonzero means that we will allow new ObjC exception syntax (@throw,
715 ; @try, etc.) in source code.
717 ObjC ObjC++ Var(flag_objc_exceptions)
718 Enable Objective-C exception and synchronization syntax
721 ObjC ObjC++ Var(flag_objc_gc)
722 Enable garbage collection (GC) in Objective-C/Objective-C++ programs
724 ; Nonzero means that we generate NeXT setjmp based exceptions.
725 fobjc-sjlj-exceptions
726 ObjC ObjC++ Var(flag_objc_sjlj_exceptions) Init(-1)
727 Enable Objective-C setjmp exception handling runtime
730 C ObjC C++ ObjC++ Var(flag_openmp)
731 Enable OpenMP (implies -frecursive in Fortran)
735 Recognize C++ keywords like \"compl\" and \"xor\"
739 Does nothing. Preserved for backward compatibility.
746 Look for and use PCH files even when preprocessing
750 Downgrade conformance errors to warnings
754 Treat the input file as already preprocessed
757 C++ ObjC++ Var(flag_pretty_templates) Init(1)
758 -fno-pretty-templates Do not pretty-print template specializations as the template signature followed by the arguments
760 freplace-objc-classes
761 ObjC ObjC++ Var(flag_replace_objc_classes)
762 Used in Fix-and-Continue mode to indicate that object files may be swapped in at runtime
766 Enable automatic template instantiation
769 C++ ObjC++ Optimization Var(flag_rtti) Init(1)
770 Generate run time type descriptor information
773 C ObjC C++ ObjC++ Optimization Var(flag_short_double)
774 Use the same size for double as for float
777 C ObjC C++ ObjC++ Optimization Var(flag_short_enums)
778 Use the narrowest integer type possible for enumeration types
781 C ObjC C++ ObjC++ Optimization Var(flag_short_wchar)
782 Force the underlying type for \"wchar_t\" to be \"unsigned short\"
785 C ObjC C++ ObjC++ Var(flag_signed_bitfields) Init(1)
786 When \"signed\" or \"unsigned\" is not given make the bitfield signed
789 C ObjC C++ ObjC++ LTO Var(flag_signed_char)
790 Make \"char\" signed by default
793 C++ ObjC++ Ignore Warn(switch %qs is no longer supported)
796 C++ ObjC++ Var(flag_detailed_statistics)
797 Display statistics accumulated during compilation
800 C++ ObjC++ Optimization Var(flag_strict_enums)
801 Assume that values of enumeration type are always within the minimum range of that type
804 C++ ObjC++ Ignore Warn(switch %qs is no longer supported)
807 C ObjC C++ ObjC++ Joined RejectNegative UInteger
808 -ftabstop=<number> Distance between tab stops for column reporting
811 C++ ObjC++ Joined RejectNegative Undocumented Alias(ftemplate-depth=)
814 C++ ObjC++ Joined RejectNegative UInteger
815 -ftemplate-depth=<number> Specify maximum template instantiation depth
818 C++ ObjC++ Ignore Warn(switch %qs is no longer supported)
821 C++ ObjC++ Optimization Var(flag_threadsafe_statics) Init(1)
822 -fno-threadsafe-statics Do not generate thread-safe code for initializing local statics
825 C ObjC C++ ObjC++ Var(flag_signed_bitfields, 0) VarExists
826 When \"signed\" or \"unsigned\" is not given make the bitfield unsigned
829 C ObjC C++ ObjC++ LTO Var(flag_signed_char, 0) VarExists
830 Make \"char\" unsigned by default
833 C++ ObjC++ Var(flag_use_cxa_atexit) Init(DEFAULT_USE_CXA_ATEXIT)
834 Use __cxa_atexit to register destructors
836 fuse-cxa-get-exception-ptr
837 C++ ObjC++ Var(flag_use_cxa_get_exception_ptr) Init(2)
838 Use __cxa_get_exception_ptr in exception handling
840 fvisibility-inlines-hidden
842 Marks all inlined methods as having hidden visibility
844 fvisibility-ms-compat
845 C++ ObjC++ Var(flag_visibility_ms_compat)
846 Changes visibility to match Microsoft Visual Studio by default
849 C++ ObjC++ Ignore Warn(switch %qs is no longer supported)
853 C++ ObjC++ Ignore Warn(switch %qs is no longer supported)
857 C++ ObjC++ Var(flag_weak) Init(1)
858 Emit common-like symbols as weak symbols
861 C ObjC C++ ObjC++ Joined RejectNegative
862 -fwide-exec-charset=<cset> Convert all wide strings and character constants to character set <cset>
865 C ObjC C++ ObjC++ Var(flag_working_directory) Init(-1)
866 Generate a #line directive pointing at the current working directory
869 C++ ObjC++ Ignore Warn(switch %qs is no longer supported)
873 ObjC ObjC++ Var(flag_zero_link)
874 Generate lazy class lookup (via objc_getClass()) for use in Zero-Link mode
877 ObjC ObjC++ Var(flag_gen_declaration)
878 Dump declarations to a .decl file
880 femit-struct-debug-baseonly
882 -femit-struct-debug-baseonly Aggressive reduced debug info for structs
884 femit-struct-debug-reduced
886 -femit-struct-debug-reduced Conservative reduced debug info for structs
888 femit-struct-debug-detailed=
889 C ObjC C++ ObjC++ Joined
890 -femit-struct-debug-detailed=<spec-list> Detailed reduced debug info for structs
893 C ObjC C++ ObjC++ Joined Separate MissingArgError(missing path after %qs)
894 -idirafter <dir> Add <dir> to the end of the system include path
897 C ObjC C++ ObjC++ Joined Separate MissingArgError(missing filename after %qs)
898 -imacros <file> Accept definition of macros in <file>
901 C ObjC C++ ObjC++ Joined Separate
902 -imultilib <dir> Set <dir> to be the multilib include subdirectory
905 C ObjC C++ ObjC++ Joined Separate MissingArgError(missing filename after %qs)
906 -include <file> Include the contents of <file> before other files
909 C ObjC C++ ObjC++ Joined Separate
910 -iprefix <path> Specify <path> as a prefix for next two options
913 C ObjC C++ ObjC++ Joined Separate MissingArgError(missing path after %qs)
914 -isysroot <dir> Set <dir> to be the system root directory
917 C ObjC C++ ObjC++ Joined Separate MissingArgError(missing path after %qs)
918 -isystem <dir> Add <dir> to the start of the system include path
921 C ObjC C++ ObjC++ Joined Separate MissingArgError(missing path after %qs)
922 -iquote <dir> Add <dir> to the end of the quote include path
925 C ObjC C++ ObjC++ Joined Separate
926 -iwithprefix <dir> Add <dir> to the end of the system include path
929 C ObjC C++ ObjC++ Joined Separate
930 -iwithprefixbefore <dir> Add <dir> to the end of the main include path
933 C Undocumented RejectDriver
937 Do not search standard system include directories (those specified with -isystem will still be used)
941 Do not search standard system include directories for C++
944 C ObjC C++ ObjC++ Joined Separate
945 ; Documented in common.opt
949 ; Documented in common.opt
953 ; Documented in common.opt
955 print-objc-runtime-info
957 Generate C header of platform-specific features
961 Remap file names when including files
965 Conform to the ISO 1998 C++ standard
969 Conform to the ISO 1998 C++ standard, with extensions that are likely to
970 become a part of the upcoming ISO C++ standard, dubbed C++0x. Note that the
971 extensions enabled by this mode are experimental and may be removed in
972 future releases of GCC.
976 Conform to the ISO 201X C standard draft (experimental and incomplete support)
979 C ObjC Alias(std=c90)
980 Conform to the ISO 1990 C standard
984 Conform to the ISO 1990 C standard
988 Conform to the ISO 1999 C standard
991 C ObjC Alias(std=c99)
992 Deprecated in favor of -std=c99
996 Conform to the ISO 1998 C++ standard with GNU extensions
1000 Conform to the ISO 1998 C++ standard, with GNU extensions and
1001 extensions that are likely to become a part of the upcoming ISO C++
1002 standard, dubbed C++0x. Note that the extensions enabled by this mode
1003 are experimental and may be removed in future releases of GCC.
1007 Conform to the ISO 201X C standard draft with GNU extensions (experimental and incomplete support)
1010 C ObjC Alias(std=gnu90)
1011 Conform to the ISO 1990 C standard with GNU extensions
1015 Conform to the ISO 1990 C standard with GNU extensions
1019 Conform to the ISO 1999 C standard with GNU extensions
1022 C ObjC Alias(std=gnu99)
1023 Deprecated in favor of -std=gnu99
1026 C ObjC Alias(std=c90)
1027 Conform to the ISO 1990 C standard
1031 Conform to the ISO 1990 C standard as amended in 1994
1034 C ObjC Alias(std=c99)
1035 Conform to the ISO 1999 C standard
1038 C ObjC Alias(std=c99)
1039 Deprecated in favor of -std=iso9899:1999
1043 Enable traditional preprocessing
1047 -trigraphs Support ISO C trigraphs
1050 C ObjC C++ ObjC++ Var(flag_undef)
1051 Do not predefine system-specific and GCC-specific macros
1054 Common C ObjC C++ ObjC++
1055 Enable verbose output
1059 ; Documented in common.opt
1061 ; This comment is to ensure we retain the blank line above.