1 ; Options for the C, ObjC, UPC, 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.
41 C UPC ObjC C++ ObjC++ Warning Alias(Wall)
44 C UPC ObjC C++ ObjC++ Alias(ansi)
47 C UPC ObjC C++ ObjC++ Separate Alias(A) MissingArgError(assertion missing after %qs)
50 C UPC ObjC C++ ObjC++ Joined Alias(A) MissingArgError(assertion missing after %qs)
53 C UPC ObjC C++ ObjC++ Alias(C)
56 C UPC ObjC C++ ObjC++ Alias(CC)
59 C UPC ObjC C++ ObjC++ Separate Alias(D) MissingArgError(macro name missing after %qs)
62 C UPC ObjC C++ ObjC++ Joined Alias(D) MissingArgError(macro name missing after %qs)
65 C UPC ObjC C++ ObjC++ Alias(M)
68 C UPC ObjC C++ ObjC++ Separate Alias(d)
71 C UPC ObjC C++ ObjC++ Joined Alias(d)
74 C UPC ObjC C++ ObjC++ Separate Alias(imacros) MissingArgError(missing filename after %qs)
77 C UPC ObjC C++ ObjC++ Joined Alias(imacros) MissingArgError(missing filename after %qs)
80 C UPC ObjC C++ ObjC++ Separate Alias(include) MissingArgError(missing filename after %qs)
83 C UPC ObjC C++ ObjC++ Joined Alias(include) MissingArgError(missing filename after %qs)
86 C UPC ObjC C++ ObjC++ Alias(I, -)
89 C UPC ObjC C++ ObjC++ Separate Alias(I) MissingArgError(missing path after %qs)
92 C UPC ObjC C++ ObjC++ Joined Alias(I) MissingArgError(missing path after %qs)
94 -include-directory-after
95 C UPC ObjC C++ ObjC++ Separate Alias(idirafter) MissingArgError(missing path after %qs)
97 -include-directory-after=
98 C UPC ObjC C++ ObjC++ Joined Alias(idirafter) MissingArgError(missing path after %qs)
101 C UPC ObjC C++ ObjC++ Separate Alias(iprefix)
104 C UPC ObjC C++ ObjC++ JoinedOrMissing Alias(iprefix)
107 C UPC ObjC C++ ObjC++ Separate Alias(iwithprefix)
109 -include-with-prefix=
110 C UPC ObjC C++ ObjC++ JoinedOrMissing Alias(iwithprefix)
112 -include-with-prefix-after
113 C UPC ObjC C++ ObjC++ Separate Alias(iwithprefix)
115 -include-with-prefix-after=
116 C UPC ObjC C++ ObjC++ JoinedOrMissing Alias(iwithprefix)
118 -include-with-prefix-before
119 C UPC ObjC C++ ObjC++ Separate Alias(iwithprefixbefore)
121 -include-with-prefix-before=
122 C UPC ObjC C++ ObjC++ JoinedOrMissing Alias(iwithprefixbefore)
125 Driver Alias(no-integrated-cpp)
128 C UPC ObjC C++ ObjC++ Alias(P)
130 -no-standard-includes
131 C UPC ObjC C++ ObjC++ Alias(nostdinc)
134 C UPC ObjC C++ ObjC++ Alias(w)
137 C UPC ObjC C++ ObjC++ Separate Alias(o)
140 C UPC ObjC C++ ObjC++ Joined Alias(o)
143 C UPC ObjC C++ ObjC++ Joined Separate
146 C UPC ObjC C++ ObjC++ Alias(pedantic)
149 C UPC ObjC C++ ObjC++ Undocumented Alias(E)
151 -print-missing-file-dependencies
152 C UPC ObjC C++ ObjC++ Alias(MG)
155 C UPC ObjC C++ ObjC++ Alias(H)
158 Driver Alias(traditional)
161 C UPC ObjC C++ ObjC++ Alias(traditional-cpp)
164 C UPC ObjC C++ ObjC++ Alias(trigraphs)
167 C UPC ObjC C++ ObjC++ Separate Alias(U) MissingArgError(macro name missing after %qs)
170 C UPC ObjC C++ ObjC++ Joined Alias(U) MissingArgError(macro name missing after %qs)
173 C UPC ObjC C++ ObjC++ Alias(MM)
176 Common C UPC ObjC C++ ObjC++ Alias(v)
179 C UPC ObjC C++ ObjC++ NoDriverArg Separate Alias(MD) MissingArgError(missing filename after %qs)
181 -write-user-dependencies
182 C UPC ObjC C++ ObjC++ NoDriverArg Separate Alias(MMD) MissingArgError(missing filename after %qs)
185 C UPC 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>
189 C UPC ObjC C++ ObjC++
190 Do not discard comments
193 C UPC ObjC C++ ObjC++
194 Do not discard comments in macro expansions
197 C UPC 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 UPC ObjC C++ ObjC++ Undocumented Var(flag_preprocess_only)
204 Driver C UPC ObjC C++ ObjC++ Joined Separate MissingArgError(missing path after %qs)
205 -F <dir> Add <dir> to the end of the main framework include path
208 C UPC ObjC C++ ObjC++
209 Print the name of header files as they are used
212 C UPC ObjC C++ ObjC++ Joined Separate MissingArgError(missing path after %qs)
213 -I <dir> Add <dir> to the end of the main include path
216 C UPC ObjC C++ ObjC++
217 Generate make dependencies
220 C UPC ObjC C++ ObjC++ NoDriverArg Separate MissingArgError(missing filename after %qs)
221 Generate make dependencies and compile
224 C UPC ObjC C++ ObjC++ Joined Separate MissingArgError(missing filename after %qs)
225 -MF <file> Write dependency output to the given file
228 C UPC ObjC C++ ObjC++
229 Treat missing header files as generated files
232 C UPC ObjC C++ ObjC++
233 Like -M but ignore system header files
236 C UPC ObjC C++ ObjC++ NoDriverArg Separate MissingArgError(missing filename after %qs)
237 Like -MD but ignore system header files
240 C UPC ObjC C++ ObjC++
241 Generate phony targets for all headers
244 C UPC ObjC C++ ObjC++ Joined Separate MissingArgError(missing makefile target after %qs)
245 -MQ <target> Add a MAKE-quoted target
248 C UPC ObjC C++ ObjC++ Joined Separate MissingArgError(missing makefile target after %qs)
249 -MT <target> Add an unquoted target
252 C UPC ObjC C++ ObjC++
253 Do not generate #line directives
256 C UPC ObjC C++ ObjC++ Joined Separate MissingArgError(macro name missing after %qs)
257 -U<macro> Undefine <macro>
260 C UPC ObjC C++ ObjC++ LTO Var(warn_abi) Warning
261 Warn about things that will change when compiling with an ABI-compliant compiler
264 C UPC ObjC C++ ObjC++ LTO Var(warn_psabi) Init(1) Undocumented
267 C UPC ObjC C++ ObjC++ Var(warn_address) Warning
268 Warn about suspicious uses of memory addresses
271 C UPC 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 UPC ObjC Var(warn_bad_function_cast) Warning
280 Warn about casting functions to incompatible types
282 Wbuiltin-macro-redefined
283 C UPC ObjC C++ ObjC++ Warning
284 Warn when a built-in preprocessor macro is undefined or redefined
287 C UPC ObjC Var(warn_cxx_compat) Warning
288 Warn about C constructs that are not in the common subset of C and C++
291 C++ ObjC++ Var(warn_cxx0x_compat) Warning LangEnabledBy(C++ ObjC++,Wall)
292 Deprecated in favor of -Wc++11-compat
295 C++ ObjC++ Warning Alias(Wc++0x-compat)
296 Warn about C++ constructs whose meaning differs between ISO C++ 1998 and ISO C++ 2011
299 C UPC ObjC C++ ObjC++ Var(warn_cast_qual) Warning
300 Warn about casts which discard qualifiers
303 C UPC ObjC C++ ObjC++ Var(warn_char_subscripts) Warning
304 Warn about subscripts whose type is \"char\"
307 C UPC ObjC C++ ObjC++ Var(warn_clobbered) Warning EnabledBy(Wextra)
308 Warn about variables that might be changed by \"longjmp\" or \"vfork\"
311 C UPC ObjC C++ ObjC++ Warning
312 Warn about possibly nested block comments, and C++ comments spanning more than one physical line
315 C UPC ObjC C++ ObjC++ Warning Alias(Wcomment)
316 Synonym for -Wcomment
319 C UPC ObjC C++ ObjC++ Var(warn_conversion) Warning
320 Warn for implicit type conversions that may change a value
323 C++ ObjC++ Var(warn_conversion_null) Init(1) Warning
324 Warn for converting NULL from/to a non-pointer type
327 C UPC ObjC C++ ObjC++ Var(warn_sign_conversion) Init(-1)
328 Warn for implicit type conversions between signed and unsigned integers
331 C++ ObjC++ Var(warn_ctor_dtor_privacy) Warning
332 Warn when all constructors and destructors are private
334 Wdeclaration-after-statement
335 C UPC ObjC Var(warn_declaration_after_statement) Warning
336 Warn when a declaration is found after a statement
338 Wdelete-non-virtual-dtor
339 C++ ObjC++ Var(warn_delnonvdtor) Warning LangEnabledBy(C++ ObjC++,Wall)
340 Warn about deleting polymorphic objects with non-virtual destructors
343 C UPC C++ ObjC ObjC++ Var(warn_deprecated) Init(1) Warning
344 Warn if a deprecated compiler feature, class, method, or field is used
347 C UPC ObjC C++ ObjC++ Var(warn_div_by_zero) Init(1) Warning
348 Warn about compile-time integer division by zero
351 C++ ObjC++ Var(warn_ecpp) Warning
352 Warn about violations of Effective C++ style rules
355 C UPC ObjC C++ ObjC++ Var(warn_empty_body) Warning EnabledBy(Wextra)
356 Warn about an empty body in an if or else statement
359 C UPC ObjC C++ ObjC++ Warning
360 Warn about stray tokens after #elif and #endif
363 C UPC ObjC C++ ObjC++ Var(warn_enum_compare) Init(-1) Warning
364 Warn about comparison of different enum types
367 C UPC ObjC C++ ObjC++
368 ; Documented in common.opt
370 Werror-implicit-function-declaration
371 C UPC ObjC RejectNegative Warning Alias(Werror=, implicit-function-declaration)
372 This switch is deprecated; use -Werror=implicit-function-declaration instead
375 C UPC ObjC C++ ObjC++ Var(warn_float_equal) Warning
376 Warn if testing floating point numbers for equality
379 C UPC ObjC C++ ObjC++ Warning
380 Warn about printf/scanf/strftime/strfmon format string anomalies
383 C UPC ObjC C++ ObjC++ Var(warn_format_extra_args) Warning
384 Warn if passing too many arguments to a function for its format string
387 C UPC ObjC C++ ObjC++ Var(warn_format_nonliteral) Warning
388 Warn about format strings that are not literals
391 C UPC ObjC C++ ObjC++ Var(warn_format_contains_nul) Warning
392 Warn about format strings that contain NUL bytes
395 C UPC ObjC C++ ObjC++ Var(warn_format_security) Warning
396 Warn about possible security problems with format functions
399 C UPC ObjC C++ ObjC++ Var(warn_format_y2k) Warning
400 Warn about strftime formats yielding 2-digit years
403 C UPC ObjC C++ ObjC++ Var(warn_format_zero_length) Warning
404 Warn about zero-length formats
407 C UPC ObjC C++ ObjC++ Joined Warning
410 C C++ Var(warn_ignored_qualifiers) Warning EnabledBy(Wextra)
411 Warn whenever type qualifiers are ignored.
414 C UPC ObjC C++ ObjC++ Var(warn_init_self) Warning
415 Warn about variables which are initialized to themselves
418 C UPC ObjC Var(warn_implicit) Init(-1) Warning
419 Warn about implicit declarations
422 C UPC ObjC C++ ObjC++ Var(warn_double_promotion) Warning
423 Warn about implicit conversions from \"float\" to \"double\"
425 Wimplicit-function-declaration
426 C UPC ObjC Var(warn_implicit_function_declaration) Init(-1) Warning
427 Warn about implicit function declarations
430 C UPC ObjC Var(warn_implicit_int) Init(-1) Warning
431 Warn when a declaration does not specify a type
434 C UPC ObjC C++ ObjC++ Undocumented Ignore
437 C UPC ObjC C++ ObjC++ Var(warn_int_to_pointer_cast) Init(1) Warning
438 Warn when there is a cast to a pointer from an integer of a different size
441 C++ ObjC++ Var(warn_invalid_offsetof) Init(1) Warning
442 Warn about invalid uses of the \"offsetof\" macro
445 C UPC ObjC C++ ObjC++ Warning
446 Warn about PCH files that are found but not used
449 C UPC ObjC Var(warn_jump_misses_init) Warning LangEnabledby(C UPC ObjC,Wc++-compat)
450 Warn when a jump misses a variable initialization
454 Warn when a string or character literal is followed by a ud-suffix which does not begin with an underscore.
457 C UPC ObjC C++ ObjC++ Var(warn_logical_op) Init(0) Warning
458 Warn when a logical operator is suspiciously always evaluating to true or false
461 C UPC ObjC C++ ObjC++ Var(warn_long_long) Init(-1) Warning
462 Do not warn about using \"long long\" when -pedantic
465 C UPC ObjC C++ ObjC++ Var(warn_main) Init(-1) Warning
466 Warn about suspicious declarations of \"main\"
469 C UPC ObjC C++ ObjC++ Var(warn_missing_braces) Warning LangEnabledBy(C UPC ObjC,Wall)
470 Warn about possibly missing braces around initializers
472 Wmissing-declarations
473 C UPC ObjC C++ ObjC++ Var(warn_missing_declarations) Warning
474 Warn about global functions without previous declarations
476 Wmissing-field-initializers
477 C UPC ObjC C++ ObjC++ Var(warn_missing_field_initializers) Warning EnabledBy(Wextra)
478 Warn about missing fields in struct initializers
480 Wsizeof-pointer-memaccess
481 C ObjC C++ ObjC++ Var(warn_sizeof_pointer_memaccess) Warning
483 Wsuggest-attribute=format
484 C UPC ObjC C++ ObjC++ Var(warn_suggest_attribute_format) Warning
485 Warn about functions which might be candidates for format attributes
487 Wmissing-format-attribute
488 C UPC ObjC C++ ObjC++ Alias(Wsuggest-attribute=format)
491 Wmissing-include-dirs
492 C UPC ObjC C++ ObjC++ Warning
493 Warn about user-specified include directories that do not exist
495 Wmissing-parameter-type
496 C UPC ObjC Var(warn_missing_parameter_type) Warning EnabledBy(Wextra)
497 Warn about function parameters declared without a type specifier in K&R-style functions
500 C UPC ObjC Var(warn_missing_prototypes) Warning
501 Warn about global functions without prototypes
504 C UPC ObjC C++ ObjC++ Var(warn_mudflap) Init(1) Warning
505 Warn about constructs not instrumented by -fmudflap
508 C UPC ObjC C++ ObjC++ Warning
509 Warn about use of multi-character character constants
512 C UPC ObjC C++ ObjC++ Warning Var(warn_narrowing) Init(-1)
513 Warn about narrowing conversions within { } that are ill-formed in C++11
516 C UPC ObjC Var(warn_nested_externs) Warning
517 Warn about \"extern\" declarations not at file scope
520 C++ ObjC++ Var(warn_noexcept) Warning
521 Warn when a noexcept expression evaluates to false even though the expression can't actually throw
524 C++ ObjC++ Var(warn_nontemplate_friend) Init(1) Warning
525 Warn when non-templatized friend functions are declared within a template
528 C++ ObjC++ Var(warn_nonvdtor) Warning
529 Warn about non-virtual destructors
532 C UPC ObjC C++ ObjC++ Var(warn_nonnull) Warning
533 Warn about NULL being passed to argument slots marked as requiring non-NULL
536 C UPC ObjC C++ ObjC++ Joined Warning
537 -Wnormalized=<id|nfc|nfkc> Warn about non-normalised Unicode strings
540 C++ ObjC++ Var(warn_old_style_cast) Warning
541 Warn if a C-style cast is used in a program
543 Wold-style-declaration
544 C UPC ObjC Var(warn_old_style_declaration) Warning EnabledBy(Wextra)
545 Warn for obsolescent usage in a declaration
547 Wold-style-definition
548 C UPC ObjC Var(warn_old_style_definition) Warning
549 Warn if an old-style parameter definition is used
552 C UPC ObjC C++ ObjC++ Var(warn_overlength_strings) Init(-1) Warning
553 Warn if a string is longer than the maximum portable length specified by the standard
556 C++ ObjC++ Var(warn_overloaded_virtual) Warning
557 Warn about overloaded virtual function names
560 C UPC ObjC Var(warn_override_init) Warning EnabledBy(Wextra)
561 Warn about overriding initializers without side effects
563 Wpacked-bitfield-compat
564 C UPC ObjC C++ ObjC++ Var(warn_packed_bitfield_compat) Init(-1) Warning
565 Warn about packed bit-fields whose offset changed in GCC 4.4
568 C UPC ObjC C++ ObjC++ Var(warn_parentheses) Warning
569 Warn about possibly missing parentheses
572 C UPC ObjC C++ ObjC++ Warning
573 ; Documented in common.opt
576 C++ ObjC++ Var(warn_pmf2ptr) Init(1) Warning
577 Warn when converting the type of pointers to member functions
580 C UPC ObjC C++ ObjC++ Var(warn_pointer_arith) Warning
581 Warn about function pointer arithmetic
584 C UPC ObjC Var(warn_pointer_to_int_cast) Init(1) Warning
585 Warn when a pointer is cast to an integer of a different size
588 C UPC ObjC C++ ObjC++ Var(warn_pragmas) Init(1) Warning
589 Warn about misuses of pragmas
591 Wproperty-assign-default
592 ObjC ObjC++ Var(warn_property_assign_default) Init(1) Warning
593 Warn if a property for an Objective-C object has no assign semantics specified
596 ObjC ObjC++ Var(warn_protocol) Init(1) Warning
597 Warn if inherited methods are unimplemented
600 C UPC ObjC C++ ObjC++ Var(warn_redundant_decls) Warning
601 Warn about multiple declarations of the same object
604 C++ ObjC++ Var(warn_reorder) Warning LangEnabledBy(C++ ObjC++,Wall)
605 Warn when the compiler reorders code
608 C UPC ObjC C++ ObjC++ Var(warn_return_type) Warning
609 Warn whenever a function's return type defaults to \"int\" (C), or about inconsistent return types (C++)
612 ObjC ObjC++ Var(warn_selector) Warning
613 Warn if a selector has multiple methods
616 C UPC ObjC C++ ObjC++ Var(warn_sequence_point) Warning
617 Warn about possible violations of sequence point rules
620 C UPC ObjC C++ ObjC++ Var(warn_sign_compare) Init(-1) Warning
621 Warn about signed-unsigned comparisons
624 C++ ObjC++ Var(warn_sign_promo) Warning
625 Warn when overload promotes from unsigned to signed
627 Wstrict-null-sentinel
628 C++ ObjC++ Warning Var(warn_strict_null_sentinel)
629 Warn about uncasted NULL used as sentinel
632 C UPC ObjC Var(warn_strict_prototypes) Warning
633 Warn about unprototyped function declarations
635 Wstrict-selector-match
636 ObjC ObjC++ Var(warn_strict_selector_match) Warning
637 Warn if type signatures of candidate methods do not match exactly
640 C UPC C++ Var(warn_sync_nand) Init(1) Warning
641 Warn when __sync_fetch_and_nand and __sync_nand_and_fetch built-in functions are used
644 C++ ObjC++ Var(warn_synth) Warning
645 Deprecated. This switch has no effect
648 C UPC ObjC C++ ObjC++ Warning
649 ; Documented in common.opt
652 C UPC ObjC Var(warn_traditional) Warning
653 Warn about features not present in traditional C
655 Wtraditional-conversion
656 C UPC ObjC Var(warn_traditional_conversion) Warning
657 Warn of prototypes causing type conversions different from what would happen in the absence of prototype
660 C UPC ObjC C++ ObjC++ Warning
661 Warn if trigraphs are encountered that might affect the meaning of the program
664 ObjC ObjC++ Var(warn_undeclared_selector) Warning
665 Warn about @selector()s without previously declared methods
668 C UPC ObjC C++ ObjC++ Warning
669 Warn if an undefined macro is used in an #if directive
672 C UPC ObjC C++ ObjC++ Warning
673 Warn about unrecognized pragmas
675 Wunsuffixed-float-constants
676 C UPC ObjC Var(warn_unsuffixed_float_constants) Warning
677 Warn about unsuffixed float constants
679 Wunused-local-typedefs
680 C UPC ObjC C++ ObjC++ Var(warn_unused_local_typedefs) Warning EnabledBy(Wunused)
681 Warn when typedefs locally defined in a function are not used
684 C UPC ObjC C++ ObjC++ Warning
685 Warn about macros defined in the main file that are not used
688 C UPC ObjC C++ ObjC++ Var(warn_unused_result) Init(1) Warning
689 Warn if a caller of a function, marked with attribute warn_unused_result, does not use its return value
692 C UPC ObjC C++ ObjC++ Warning
693 Do not warn about using variadic macros when -pedantic
696 C UPC ObjC C++ ObjC++ Warning Var(warn_varargs) Init(1)
697 Warn about questionable usage of the macros used to retrieve variable arguments
700 C UPC ObjC C++ ObjC++ Var(warn_vla) Init(-1) Warning
701 Warn if a variable length array is used
703 Wvolatile-register-var
704 C UPC ObjC C++ ObjC++ Var(warn_volatile_register_var) Warning
705 Warn when a register variable is declared volatile
708 C UPC ObjC C++ ObjC++ Var(warn_write_strings) Warning
709 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.
712 C UPC ObjC Var(warn_pointer_sign) Init(-1) Warning
713 Warn when a pointer differs in signedness in an assignment
715 Wzero-as-null-pointer-constant
716 C++ ObjC++ Var(warn_zero_as_null_pointer_constant) Warning
717 Warn when a literal '0' is used as null pointer
720 C++ ObjC++ Var(warn_useless_cast) Warning
721 Warn about useless casts
724 C UPC ObjC C++ ObjC++
725 A synonym for -std=c89 (for C) or -std=c++98 (for C++)
728 C UPC ObjC C++ ObjC++ Joined
729 ; Documented in common.opt. FIXME - what about -dI, -dD, -dN and -dD?
733 Generate DWARF-2 debug info with UPC extensions
736 C++ ObjC++ Var(flag_access_control) Init(1)
737 Enforce class member access control semantics
740 C++ ObjC++ Ignore Warn(switch %qs is no longer supported)
742 fallow-parameterless-variadic-functions
743 C UPC ObjC Var(flag_allow_parameterless_variadic_functions)
744 Allow variadic functions without named parameter
746 falt-external-templates
747 C++ ObjC++ Ignore Warn(switch %qs is no longer supported)
751 C UPC ObjC C++ ObjC++ Var(flag_no_asm, 0)
752 Recognize the \"asm\" keyword
754 ; Define extra predefined macros for use in libgcc.
756 C UPC ObjC C++ ObjC++ Undocumented Var(flag_building_libgcc)
759 C UPC ObjC C++ ObjC++ Var(flag_no_builtin, 0)
760 Recognize built-in functions
763 C UPC ObjC C++ ObjC++ Joined
766 C++ ObjC++ Var(flag_check_new)
767 Check the return value of new
770 C UPC ObjC C++ ObjC++
771 Allow the arguments of the '?' operator to have different types
774 C++ ObjC++ Var(flag_conserve_space)
775 Does nothing. Preserved for backward compatibility.
777 fconstant-string-class=
778 ObjC ObjC++ Joined MissingArgError(no class name specified with %qs)
779 -fconst-string-class=<name> Use class <name> for constant strings
782 C++ ObjC++ Joined RejectNegative UInteger Var(max_constexpr_depth) Init(512)
783 -fconstexpr-depth=<number> Specify maximum constexpr recursion depth
786 C UPC ObjC C++ ObjC++
787 Emit debug annotations during preprocessing
790 C++ ObjC++ Var(flag_deduce_init_list) Init(0)
791 -fdeduce-init-list enable deduction of std::initializer_list for a template type parameter from a brace-enclosed initializer-list
795 Does nothing. Preserved for backward compatibility.
798 C UPC ObjC C++ ObjC++
799 Preprocess directives only.
801 fdollars-in-identifiers
802 C UPC ObjC C++ ObjC++
803 Permit '$' as an identifier character
806 C++ ObjC++ Var(flag_elide_constructors) Init(1)
809 C++ ObjC++ Var(flag_enforce_eh_specs) Init(1)
810 Generate code to check exception specifications
813 C++ ObjC++ Ignore Warn(switch %qs is no longer supported)
816 C UPC ObjC C++ ObjC++ Joined RejectNegative
817 -fexec-charset=<cset> Convert all strings and character constants to character set <cset>
819 fextended-identifiers
820 C UPC ObjC C++ ObjC++
821 Permit universal character names (\\u and \\U) in identifiers
824 C UPC ObjC C++ ObjC++ Joined RejectNegative
825 -finput-charset=<cset> Specify the default character set for source files
829 C++ ObjC++ Ignore Warn(switch %qs is no longer supported)
832 C++ ObjC++ Var(flag_new_for_scope) Init(1)
833 Scope of for-init-statement variables is local to the loop
836 C UPC ObjC C++ ObjC++
837 Do not assume that standard C libraries and \"main\" exist
840 C++ ObjC++ Var(flag_no_gnu_keywords, 0)
841 Recognize GNU-defined keywords
844 ObjC ObjC++ Report RejectNegative Var(flag_next_runtime,0) Init(NEXT_OBJC_RUNTIME)
845 Generate code for GNU runtime environment
848 C UPC ObjC Var(flag_gnu89_inline) Init(-1)
849 Use traditional GNU semantics for inline functions
852 C++ ObjC++ Ignore Warn(switch %qs is no longer supported)
855 C++ ObjC++ Optimization Alias(fexceptions) Warn({-fhandle-exceptions has been renamed -fexceptions (and is now on by default)})
858 C++ ObjC++ Ignore Warn(switch %qs is no longer supported)
862 Assume normal C execution environment
865 C++ ObjC++ Ignore Warn(switch %qs is no longer supported)
869 C++ ObjC++ Var(flag_implement_inlines) Init(1)
870 Export functions even if they can be inlined
872 fimplicit-inline-templates
873 C++ ObjC++ Var(flag_implicit_inline_templates) Init(1)
874 Emit implicit instantiations of inline templates
877 C++ ObjC++ Var(flag_implicit_templates) Init(1)
878 Emit implicit instantiations of templates
881 C++ ObjC++ Var(flag_friend_injection)
882 Inject friend functions into enclosing namespace
884 fkeep-inline-dllexport
885 C UPC C++ ObjC ObjC++ Var(flag_keep_inline_dllexport) Init(1) Report Condition(TARGET_DLLIMPORT_DECL_ATTRIBUTES)
886 Don't emit dllexported inline functions unless needed
889 C++ ObjC++ Ignore Warn(switch %qs is no longer supported)
891 flax-vector-conversions
892 C UPC ObjC C++ ObjC++ Var(flag_lax_vector_conversions)
893 Allow implicit conversions between vectors with differing numbers of subparts and/or differing element types.
896 C UPC ObjC C++ ObjC++ Var(flag_ms_extensions)
897 Don't warn about uses of Microsoft extensions
900 C UPC ObjC C++ ObjC++ RejectNegative Report Var(flag_mudflap)
901 Add mudflap bounds-checking instrumentation for single-threaded program
904 C UPC ObjC C++ ObjC++ RejectNegative Report Var(flag_mudflap,2)
905 Add mudflap bounds-checking instrumentation for multi-threaded program
908 C UPC ObjC C++ ObjC++ RejectNegative Report Var(flag_mudflap_ignore_reads)
909 Ignore read operations when inserting mudflap instrumentation
911 fname-mangling-version-
912 C++ ObjC++ Joined Ignore Warn(switch %qs is no longer supported)
915 C++ ObjC++ Ignore Warn(switch %qs is no longer supported)
918 ObjC ObjC++ Report RejectNegative Var(flag_next_runtime)
919 Generate code for NeXT (Apple Mac OS X) runtime environment
922 ObjC ObjC++ Var(flag_nil_receivers) Init(1)
923 Assume that receivers of Objective-C messages may be nil
926 C++ ObjC++ Var(flag_no_nonansi_builtin, 0)
929 C++ ObjC++ Ignore Warn(switch %qs is no longer supported)
932 C++ ObjC++ Optimization Var(flag_nothrow_opt)
933 Treat a throw() exception specification as noexcept to improve code size
936 ObjC ObjC++ Joined Report RejectNegative UInteger Var(flag_objc_abi)
937 Specify which ABI to use for Objective-C family code and meta-data generation.
939 ; Generate special '- .cxx_construct' and '- .cxx_destruct' methods
940 ; to initialize any non-POD ivars in Objective-C++ classes.
941 fobjc-call-cxx-cdtors
942 ObjC++ Var(flag_objc_call_cxx_cdtors)
943 Generate special Objective-C methods to initialize/destroy non-POD C++ ivars, if needed
945 fobjc-direct-dispatch
946 ObjC ObjC++ Var(flag_objc_direct_dispatch)
947 Allow fast jumps to the message dispatcher
949 ; Nonzero means that we will allow new ObjC exception syntax (@throw,
950 ; @try, etc.) in source code.
952 ObjC ObjC++ Var(flag_objc_exceptions)
953 Enable Objective-C exception and synchronization syntax
956 ObjC ObjC++ Var(flag_objc_gc)
957 Enable garbage collection (GC) in Objective-C/Objective-C++ programs
960 ObjC ObjC++ Var(flag_objc_nilcheck,1)
961 Enable inline checks for nil receivers with the NeXT runtime and ABI version 2.
963 ; Nonzero means that we generate NeXT setjmp based exceptions.
964 fobjc-sjlj-exceptions
965 ObjC ObjC++ Var(flag_objc_sjlj_exceptions) Init(-1)
966 Enable Objective-C setjmp exception handling runtime
969 ObjC ObjC++ Var(flag_objc1_only)
970 Conform to the Objective-C 1.0 language as implemented in GCC 4.0
973 C UPC ObjC C++ ObjC++ Var(flag_openmp)
974 Enable OpenMP (implies -frecursive in Fortran)
978 Recognize C++ keywords like \"compl\" and \"xor\"
982 Does nothing. Preserved for backward compatibility.
985 C UPC ObjC C++ ObjC++
988 C UPC ObjC C++ ObjC++
989 Look for and use PCH files even when preprocessing
992 C++ ObjC++ Var(flag_permissive)
993 Downgrade conformance errors to warnings
996 C UPC ObjC Var(flag_plan9_extensions)
997 Enable Plan 9 language extensions
1000 C UPC ObjC C++ ObjC++
1001 Treat the input file as already preprocessed
1003 ftrack-macro-expansion
1004 C UPC ObjC C++ ObjC++ JoinedOrMissing RejectNegative UInteger
1005 ; converted into ftrack-macro-expansion=
1007 ftrack-macro-expansion=
1008 C UPC ObjC C++ ObjC++ JoinedOrMissing RejectNegative UInteger
1009 -ftrack-macro-expansion=<0|1|2> Track locations of tokens coming from macro expansion and display them in error messages
1012 C++ ObjC++ Var(flag_pretty_templates) Init(1)
1013 -fno-pretty-templates Do not pretty-print template specializations as the template signature followed by the arguments
1015 freplace-objc-classes
1016 ObjC ObjC++ Var(flag_replace_objc_classes)
1017 Used in Fix-and-Continue mode to indicate that object files may be swapped in at runtime
1021 Enable automatic template instantiation
1024 C++ ObjC++ Optimization Var(flag_rtti) Init(1)
1025 Generate run time type descriptor information
1028 C UPC ObjC C++ ObjC++ Optimization Var(flag_short_double)
1029 Use the same size for double as for float
1032 C UPC ObjC C++ ObjC++ Optimization Var(flag_short_enums)
1033 Use the narrowest integer type possible for enumeration types
1036 C UPC ObjC C++ ObjC++ Optimization Var(flag_short_wchar)
1037 Force the underlying type for \"wchar_t\" to be \"unsigned short\"
1040 C UPC ObjC C++ ObjC++ Var(flag_signed_bitfields) Init(1)
1041 When \"signed\" or \"unsigned\" is not given make the bitfield signed
1044 C UPC ObjC C++ ObjC++ LTO Var(flag_signed_char)
1045 Make \"char\" signed by default
1048 C++ ObjC++ Ignore Warn(switch %qs is no longer supported)
1051 C++ ObjC++ Var(flag_detailed_statistics)
1052 Display statistics accumulated during compilation
1055 C++ ObjC++ Optimization Var(flag_strict_enums)
1056 Assume that values of enumeration type are always within the minimum range of that type
1059 C++ ObjC++ Ignore Warn(switch %qs is no longer supported)
1062 C UPC ObjC C++ ObjC++ Joined RejectNegative UInteger
1063 -ftabstop=<number> Distance between tab stops for column reporting
1065 ftemplate-backtrace-limit=
1066 C++ ObjC++ Joined RejectNegative UInteger Var(template_backtrace_limit) Init(10)
1067 Set the maximum number of template instantiation notes for a single warning or error
1070 C++ ObjC++ Joined RejectNegative Undocumented Alias(ftemplate-depth=)
1073 C++ ObjC++ Joined RejectNegative UInteger
1074 -ftemplate-depth=<number> Specify maximum template instantiation depth
1077 C++ ObjC++ Ignore Warn(switch %qs is no longer supported)
1080 C++ ObjC++ Optimization Var(flag_threadsafe_statics) Init(1)
1081 -fno-threadsafe-statics Do not generate thread-safe code for initializing local statics
1084 C UPC ObjC C++ ObjC++ Var(flag_signed_bitfields, 0)
1085 When \"signed\" or \"unsigned\" is not given make the bitfield unsigned
1088 C UPC ObjC C++ ObjC++ LTO Var(flag_signed_char, 0)
1089 Make \"char\" unsigned by default
1092 UPC Var(flag_upc_debug) VarExists
1093 Generate code that provides the UPC runtime with
1094 the file and line number where the runtime was called.
1097 UPC Var(flag_upc_inline_lib) VarExists
1098 Generate code for inlined UPC runtime library routines.
1099 Default, at optimization levels greater than 0.
1103 Enable UPC linker specs for upc-crtbegin/upc-crtend
1107 Pre-include UPC runtime header file
1109 fupc-pthreads-model-tls
1111 Generate code for a POSIX threads based UPC runtime environment
1112 with TLS (Thread Local Storage) support
1114 fupc-pthreads-per-process-
1115 UPC Joined RejectNegative UInteger
1116 Specify the number of POSIX threads per process that are mapped to UPC threads
1119 UPC Joined RejectNegative UInteger
1120 Specify the compile-time value of THREADS
1123 C UPC Var(flag_upc_instrument) VarExists
1124 Instrument UPC shared accesses and library calls, using GASP tool support
1126 fupc-instrument-functions
1127 C UPC Var(flag_upc_instrument_functions) VarExists
1128 Instrument functions calls, using GASP tool support (implies -fupc-instrument)
1131 C++ ObjC++ Var(flag_use_cxa_atexit) Init(DEFAULT_USE_CXA_ATEXIT)
1132 Use __cxa_atexit to register destructors
1134 fuse-cxa-get-exception-ptr
1135 C++ ObjC++ Var(flag_use_cxa_get_exception_ptr) Init(2)
1136 Use __cxa_get_exception_ptr in exception handling
1138 fvisibility-inlines-hidden
1140 Marks all inlined functions and methods as having hidden visibility
1142 fvisibility-ms-compat
1143 C++ ObjC++ Var(flag_visibility_ms_compat)
1144 Changes visibility to match Microsoft Visual Studio by default
1147 C++ ObjC++ Ignore Warn(switch %qs is no longer supported)
1151 C++ ObjC++ Ignore Warn(switch %qs is no longer supported)
1155 C++ ObjC++ Var(flag_weak) Init(1)
1156 Emit common-like symbols as weak symbols
1159 C UPC ObjC C++ ObjC++ Joined RejectNegative
1160 -fwide-exec-charset=<cset> Convert all wide strings and character constants to character set <cset>
1163 C UPC ObjC C++ ObjC++ Var(flag_working_directory) Init(-1)
1164 Generate a #line directive pointing at the current working directory
1167 C++ ObjC++ Ignore Warn(switch %qs is no longer supported)
1171 ObjC ObjC++ Var(flag_zero_link)
1172 Generate lazy class lookup (via objc_getClass()) for use in Zero-Link mode
1175 ObjC ObjC++ Var(flag_gen_declaration)
1176 Dump declarations to a .decl file
1178 femit-struct-debug-baseonly
1179 C UPC ObjC C++ ObjC++
1180 -femit-struct-debug-baseonly Aggressive reduced debug info for structs
1182 femit-struct-debug-reduced
1183 C UPC ObjC C++ ObjC++
1184 -femit-struct-debug-reduced Conservative reduced debug info for structs
1186 femit-struct-debug-detailed=
1187 C UPC ObjC C++ ObjC++ Joined
1188 -femit-struct-debug-detailed=<spec-list> Detailed reduced debug info for structs
1191 C UPC ObjC C++ ObjC++ Joined Separate MissingArgError(missing path after %qs)
1192 -idirafter <dir> Add <dir> to the end of the system include path
1195 C UPC ObjC C++ ObjC++ Joined Separate MissingArgError(missing filename after %qs)
1196 -imacros <file> Accept definition of macros in <file>
1199 C UPC ObjC C++ ObjC++ Joined Separate
1200 -imultilib <dir> Set <dir> to be the multilib include subdirectory
1203 C UPC ObjC C++ ObjC++ Joined Separate MissingArgError(missing filename after %qs)
1204 -include <file> Include the contents of <file> before other files
1207 C UPC ObjC C++ ObjC++ Joined Separate
1208 -iprefix <path> Specify <path> as a prefix for next two options
1211 C UPC ObjC C++ ObjC++ Joined Separate MissingArgError(missing path after %qs)
1212 -isysroot <dir> Set <dir> to be the system root directory
1215 C UPC ObjC C++ ObjC++ Joined Separate MissingArgError(missing path after %qs)
1216 -isystem <dir> Add <dir> to the start of the system include path
1219 C UPC ObjC C++ ObjC++ Joined Separate MissingArgError(missing path after %qs)
1220 -iquote <dir> Add <dir> to the end of the quote include path
1223 C UPC ObjC C++ ObjC++ Joined Separate
1224 -iwithprefix <dir> Add <dir> to the end of the system include path
1227 C UPC ObjC C++ ObjC++ Joined Separate
1228 -iwithprefixbefore <dir> Add <dir> to the end of the main include path
1231 C Undocumented RejectDriver
1240 C UPC ObjC C++ ObjC++
1241 Do not search standard system include directories (those specified with -isystem will still be used)
1245 Do not search standard system include directories for C++
1248 C UPC ObjC C++ ObjC++ Joined Separate
1249 ; Documented in common.opt
1252 C UPC ObjC C++ ObjC++ Alias(Wpedantic)
1253 ; Documented in common.opt
1255 print-objc-runtime-info
1257 Generate C header of platform-specific features
1260 C UPC ObjC C++ ObjC++
1261 Remap file names when including files
1265 Conform to the ISO 1998 C++ standard revised by the 2003 technical corrigendum
1268 C++ ObjC++ Alias(std=c++98)
1269 Conform to the ISO 1998 C++ standard revised by the 2003 technical corrigendum
1273 Conform to the ISO 2011 C++ standard (experimental and incomplete support)
1276 C++ ObjC++ Alias(std=c++11)
1277 Deprecated in favor of -std=c++11
1281 Conform to the ISO 201y(7?) C++ draft standard (experimental and incomplete support)
1285 Conform to the ISO 2011 C standard (experimental and incomplete support)
1288 C UPC ObjC Alias(std=c11)
1289 Deprecated in favor of -std=c11
1292 C UPC ObjC Alias(std=c90)
1293 Conform to the ISO 1990 C standard
1297 Conform to the ISO 1990 C standard
1301 Conform to the ISO 1999 C standard
1304 C UPC ObjC Alias(std=c99)
1305 Deprecated in favor of -std=c99
1309 Conform to the ISO 1998 C++ standard revised by the 2003 technical
1310 corrigendum with GNU extensions
1313 C++ ObjC++ Alias(std=gnu++98)
1314 Conform to the ISO 1998 C++ standard revised by the 2003 technical
1315 corrigendum with GNU extensions
1319 Conform to the ISO 2011 C++ standard with GNU extensions (experimental and incomplete support)
1322 C++ ObjC++ Alias(std=gnu++11)
1323 Deprecated in favor of -std=gnu++11
1327 Conform to the ISO 201y(7?) C++ draft standard with GNU extensions (experimental and incomplete support)
1331 Conform to the ISO 2011 C standard with GNU extensions (experimental and incomplete support)
1334 C UPC ObjC Alias(std=gnu11)
1335 Deprecated in favor of -std=gnu11
1338 C UPC ObjC Alias(std=gnu90)
1339 Conform to the ISO 1990 C standard with GNU extensions
1343 Conform to the ISO 1990 C standard with GNU extensions
1347 Conform to the ISO 1999 C standard with GNU extensions
1350 C UPC ObjC Alias(std=gnu99)
1351 Deprecated in favor of -std=gnu99
1354 C UPC ObjC Alias(std=c90)
1355 Conform to the ISO 1990 C standard
1359 Conform to the ISO 1990 C standard as amended in 1994
1362 C UPC ObjC Alias(std=c99)
1363 Conform to the ISO 1999 C standard
1366 C UPC ObjC Alias(std=c99)
1367 Deprecated in favor of -std=iso9899:1999
1370 C UPC ObjC Alias(std=c11)
1371 Conform to the ISO 2011 C standard (experimental and incomplete support)
1377 C UPC ObjC C++ ObjC++
1378 Enable traditional preprocessing
1381 C UPC ObjC C++ ObjC++
1382 -trigraphs Support ISO C trigraphs
1385 C UPC ObjC C++ ObjC++ Var(flag_undef)
1386 Do not predefine system-specific and GCC-specific macros
1389 C UPC ObjC C++ ObjC++
1390 ; Documented in common.opt
1393 C UPC ObjC C++ ObjC++
1394 ; Documented in common.opt
1396 ; This comment is to ensure we retain the blank line above.