1 ; Options for the C, ObjC, UPC, C++ and ObjC++ front ends.
2 ; Copyright (C) 2003-2013 Free Software Foundation, Inc.
4 ; This file is part of GCC.
6 ; GCC is free software; you can redistribute it and/or modify it under
7 ; the terms of the GNU General Public License as published by the Free
8 ; Software Foundation; either version 3, or (at your option) any later
11 ; GCC is distributed in the hope that it will be useful, but WITHOUT ANY
12 ; WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 ; FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
16 ; You should have received a copy of the GNU General Public License
17 ; along with GCC; see the file COPYING3. If not see
18 ; <http://www.gnu.org/licenses/>.
20 ; See the GCC internals manual for a description of this file's format.
22 ; Please try to keep this file in ASCII collating order.
40 C UPC ObjC C++ ObjC++ Warning Alias(Wall)
43 C UPC ObjC C++ ObjC++ Alias(ansi)
46 C UPC ObjC C++ ObjC++ Separate Alias(A) MissingArgError(assertion missing after %qs)
49 C UPC ObjC C++ ObjC++ Joined Alias(A) MissingArgError(assertion missing after %qs)
52 C UPC ObjC C++ ObjC++ Alias(C)
55 C UPC ObjC C++ ObjC++ Alias(CC)
58 C UPC ObjC C++ ObjC++ Separate Alias(D) MissingArgError(macro name missing after %qs)
61 C UPC ObjC C++ ObjC++ Joined Alias(D) MissingArgError(macro name missing after %qs)
64 C UPC ObjC C++ ObjC++ Alias(M)
67 C UPC ObjC C++ ObjC++ Separate Alias(d)
70 C UPC ObjC C++ ObjC++ Joined Alias(d)
73 C UPC ObjC C++ ObjC++ Separate Alias(imacros) MissingArgError(missing filename after %qs)
76 C UPC ObjC C++ ObjC++ Joined Alias(imacros) MissingArgError(missing filename after %qs)
79 C UPC ObjC C++ ObjC++ Separate Alias(include) MissingArgError(missing filename after %qs)
82 C UPC ObjC C++ ObjC++ Joined Alias(include) MissingArgError(missing filename after %qs)
85 C UPC ObjC C++ ObjC++ Alias(I, -)
88 C UPC ObjC C++ ObjC++ Separate Alias(I) MissingArgError(missing path after %qs)
91 C UPC ObjC C++ ObjC++ Joined Alias(I) MissingArgError(missing path after %qs)
93 -include-directory-after
94 C UPC ObjC C++ ObjC++ Separate Alias(idirafter) MissingArgError(missing path after %qs)
96 -include-directory-after=
97 C UPC ObjC C++ ObjC++ Joined Alias(idirafter) MissingArgError(missing path after %qs)
100 C UPC ObjC C++ ObjC++ Separate Alias(iprefix)
103 C UPC ObjC C++ ObjC++ JoinedOrMissing Alias(iprefix)
106 C UPC ObjC C++ ObjC++ Separate Alias(iwithprefix)
108 -include-with-prefix=
109 C UPC ObjC C++ ObjC++ JoinedOrMissing Alias(iwithprefix)
111 -include-with-prefix-after
112 C UPC ObjC C++ ObjC++ Separate Alias(iwithprefix)
114 -include-with-prefix-after=
115 C UPC ObjC C++ ObjC++ JoinedOrMissing Alias(iwithprefix)
117 -include-with-prefix-before
118 C UPC ObjC C++ ObjC++ Separate Alias(iwithprefixbefore)
120 -include-with-prefix-before=
121 C UPC ObjC C++ ObjC++ JoinedOrMissing Alias(iwithprefixbefore)
124 Driver Alias(no-integrated-cpp)
127 C UPC ObjC C++ ObjC++ Alias(P)
129 -no-standard-includes
130 C UPC ObjC C++ ObjC++ Alias(nostdinc)
133 C UPC ObjC C++ ObjC++ Alias(w)
136 C UPC ObjC C++ ObjC++ Separate Alias(o)
139 C UPC ObjC C++ ObjC++ Joined Alias(o)
142 C UPC ObjC C++ ObjC++ Joined Separate
145 C UPC ObjC C++ ObjC++ Alias(pedantic)
148 C UPC ObjC C++ ObjC++ Undocumented Alias(E)
150 -print-missing-file-dependencies
151 C UPC ObjC C++ ObjC++ Alias(MG)
154 C UPC ObjC C++ ObjC++ Alias(H)
157 Driver Alias(traditional)
160 C UPC ObjC C++ ObjC++ Alias(traditional-cpp)
163 C UPC ObjC C++ ObjC++ Alias(trigraphs)
166 C UPC ObjC C++ ObjC++ Separate Alias(U) MissingArgError(macro name missing after %qs)
169 C UPC ObjC C++ ObjC++ Joined Alias(U) MissingArgError(macro name missing after %qs)
172 C UPC ObjC C++ ObjC++ Alias(MM)
175 Common C UPC ObjC C++ ObjC++ Alias(v)
178 C UPC ObjC C++ ObjC++ NoDriverArg Separate Alias(MD) MissingArgError(missing filename after %qs)
180 -write-user-dependencies
181 C UPC ObjC C++ ObjC++ NoDriverArg Separate Alias(MMD) MissingArgError(missing filename after %qs)
184 C UPC ObjC C++ ObjC++ Joined Separate MissingArgError(assertion missing after %qs)
185 -A<question>=<answer> Assert the <answer> to <question>. Putting '-' before <question> disables the <answer> to <question>
188 C UPC ObjC C++ ObjC++
189 Do not discard comments
192 C UPC ObjC C++ ObjC++
193 Do not discard comments in macro expansions
196 C UPC ObjC C++ ObjC++ Joined Separate MissingArgError(macro name missing after %qs)
197 -D<macro>[=<val>] Define a <macro> with <val> as its value. If just <macro> is given, <val> is taken to be 1
200 C UPC ObjC C++ ObjC++ Undocumented Var(flag_preprocess_only)
203 Driver C UPC ObjC C++ ObjC++ Joined Separate MissingArgError(missing path after %qs)
204 -F <dir> Add <dir> to the end of the main framework include path
207 C UPC ObjC C++ ObjC++
208 Print the name of header files as they are used
211 C UPC ObjC C++ ObjC++ Joined Separate MissingArgError(missing path after %qs)
212 -I <dir> Add <dir> to the end of the main include path
215 C UPC ObjC C++ ObjC++
216 Generate make dependencies
219 C UPC ObjC C++ ObjC++ NoDriverArg Separate MissingArgError(missing filename after %qs)
220 Generate make dependencies and compile
223 C UPC ObjC C++ ObjC++ Joined Separate MissingArgError(missing filename after %qs)
224 -MF <file> Write dependency output to the given file
227 C UPC ObjC C++ ObjC++
228 Treat missing header files as generated files
231 C UPC ObjC C++ ObjC++
232 Like -M but ignore system header files
235 C UPC ObjC C++ ObjC++ NoDriverArg Separate MissingArgError(missing filename after %qs)
236 Like -MD but ignore system header files
239 C UPC ObjC C++ ObjC++
240 Generate phony targets for all headers
243 C UPC ObjC C++ ObjC++ Joined Separate MissingArgError(missing makefile target after %qs)
244 -MQ <target> Add a MAKE-quoted target
247 C UPC ObjC C++ ObjC++ Joined Separate MissingArgError(missing makefile target after %qs)
248 -MT <target> Add an unquoted target
251 C UPC ObjC C++ ObjC++
252 Do not generate #line directives
255 C UPC ObjC C++ ObjC++ Joined Separate MissingArgError(macro name missing after %qs)
256 -U<macro> Undefine <macro>
259 C UPC ObjC C++ ObjC++ LTO Var(warn_abi) Warning
260 Warn about things that will change when compiling with an ABI-compliant compiler
263 C++ ObjC++ Var(warn_abi_tag) Warning
264 Warn if a subobject has an abi_tag attribute that the complete object type does not have
267 C UPC ObjC C++ ObjC++ LTO Var(warn_psabi) Init(1) Undocumented
270 C UPC ObjC C++ ObjC++ Var(warn_address) Warning LangEnabledBy(C UPC ObjC C++ ObjC++,Wall)
271 Warn about suspicious uses of memory addresses
274 C UPC ObjC C++ ObjC++ Warning
275 Enable most warning messages
278 LangEnabledBy(C UPC ObjC C++ ObjC++,Wall)
282 ObjC ObjC++ Var(warn_assign_intercept) Warning
283 Warn whenever an Objective-C assignment is being intercepted by the garbage collector
286 C UPC ObjC Var(warn_bad_function_cast) Warning
287 Warn about casting functions to incompatible types
289 Wbuiltin-macro-redefined
290 C UPC ObjC C++ ObjC++ Warning
291 Warn when a built-in preprocessor macro is undefined or redefined
294 C UPC ObjC Var(warn_cxx_compat) Warning
295 Warn about C constructs that are not in the common subset of C and C++
298 C++ ObjC++ Var(warn_cxx0x_compat) Warning LangEnabledBy(C++ ObjC++,Wall)
299 Deprecated in favor of -Wc++11-compat
302 C++ ObjC++ Warning Alias(Wc++0x-compat)
303 Warn about C++ constructs whose meaning differs between ISO C++ 1998 and ISO C++ 2011
306 C UPC ObjC C++ ObjC++ Var(warn_cast_qual) Warning
307 Warn about casts which discard qualifiers
310 C UPC ObjC C++ ObjC++ Var(warn_char_subscripts) Warning LangEnabledBy(C UPC ObjC C++ ObjC++,Wall)
311 Warn about subscripts whose type is \"char\"
314 C UPC ObjC C++ ObjC++ Var(warn_clobbered) Warning EnabledBy(Wextra)
315 Warn about variables that might be changed by \"longjmp\" or \"vfork\"
318 C UPC ObjC C++ ObjC++ Warning
319 Warn about possibly nested block comments, and C++ comments spanning more than one physical line
322 C UPC ObjC C++ ObjC++ Warning Alias(Wcomment)
323 Synonym for -Wcomment
326 C UPC ObjC C++ ObjC++ Var(warn_conversion) Warning
327 Warn for implicit type conversions that may change a value
330 C++ ObjC++ Var(warn_conversion_null) Init(1) Warning
331 Warn for converting NULL from/to a non-pointer type
334 C++ ObjC++ Var(warn_ctor_dtor_privacy) Warning
335 Warn when all constructors and destructors are private
337 Wdeclaration-after-statement
338 C UPC ObjC Var(warn_declaration_after_statement) Warning
339 Warn when a declaration is found after a statement
341 Wdelete-non-virtual-dtor
342 C++ ObjC++ Var(warn_delnonvdtor) Warning LangEnabledBy(C++ ObjC++,Wall)
343 Warn about deleting polymorphic objects with non-virtual destructors
345 Wdelete-non-virtual-dtor
346 LangEnabledBy(C++ ObjC++,Weffc++)
350 C UPC C++ ObjC ObjC++ Var(warn_deprecated) Init(1) Warning
351 Warn if a deprecated compiler feature, class, method, or field is used
354 C UPC ObjC C++ ObjC++ Var(warn_div_by_zero) Init(1) Warning
355 Warn about compile-time integer division by zero
358 C++ ObjC++ Var(warn_ecpp) Warning
359 Warn about violations of Effective C++ style rules
362 C UPC ObjC C++ ObjC++ Var(warn_empty_body) Warning EnabledBy(Wextra)
363 Warn about an empty body in an if or else statement
366 C UPC ObjC C++ ObjC++ Warning
367 Warn about stray tokens after #elif and #endif
370 C UPC ObjC C++ ObjC++ Var(warn_enum_compare) Init(-1) Warning LangEnabledBy(C UPC ObjC,Wall)
371 Warn about comparison of different enum types
374 LangEnabledBy(C UPC ObjC,Wc++-compat)
378 C UPC ObjC C++ ObjC++
379 ; Documented in common.opt
381 Werror-implicit-function-declaration
382 C UPC ObjC RejectNegative Warning Alias(Werror=, implicit-function-declaration)
383 This switch is deprecated; use -Werror=implicit-function-declaration instead
386 C UPC ObjC C++ ObjC++ Var(warn_float_equal) Warning
387 Warn if testing floating point numbers for equality
390 C UPC ObjC C++ ObjC++ Warning Alias(Wformat=, 1, 0)
391 Warn about printf/scanf/strftime/strfmon format string anomalies
394 C UPC ObjC C++ ObjC++ Var(warn_format_contains_nul) Warning LangEnabledBy(C UPC ObjC C++ ObjC++,Wformat=, warn_format >= 1, 0)
395 Warn about format strings that contain NUL bytes
398 C UPC ObjC C++ ObjC++ Var(warn_format_extra_args) Warning LangEnabledBy(C UPC ObjC C++ ObjC++,Wformat=, warn_format >= 1, 0)
399 Warn if passing too many arguments to a function for its format string
402 C UPC ObjC C++ ObjC++ Var(warn_format_nonliteral) Warning LangEnabledBy(C UPC ObjC C++ ObjC++,Wformat=, warn_format >= 2, 0)
403 Warn about format strings that are not literals
406 C UPC ObjC C++ ObjC++ Var(warn_format_security) Warning LangEnabledBy(C UPC ObjC C++ ObjC++,Wformat=, warn_format >= 2, 0)
407 Warn about possible security problems with format functions
410 C UPC ObjC C++ ObjC++ Var(warn_format_y2k) Warning LangEnabledBy(C UPC ObjC C++ ObjC++,Wformat=,warn_format >= 2, 0)
411 Warn about strftime formats yielding 2-digit years
414 C UPC ObjC C++ ObjC++ Var(warn_format_zero_length) Warning LangEnabledBy(C UPC ObjC C++ ObjC++,Wformat=,warn_format >= 1, 0)
415 Warn about zero-length formats
418 C UPC ObjC C++ ObjC++ Joined RejectNegative UInteger Var(warn_format) Warning LangEnabledBy(C UPC ObjC C++ ObjC++,Wall, 1, 0)
419 Warn about printf/scanf/strftime/strfmon format string anomalies
422 C C++ Var(warn_ignored_qualifiers) Warning EnabledBy(Wextra)
423 Warn whenever type qualifiers are ignored.
426 C UPC ObjC C++ ObjC++ Var(warn_init_self) Warning LangEnabledBy(C++ ObjC++,Wall)
427 Warn about variables which are initialized to themselves
430 C UPC ObjC Var(warn_implicit) Warning LangEnabledBy(C UPC ObjC,Wall)
431 Warn about implicit declarations
434 C UPC ObjC C++ ObjC++ Var(warn_double_promotion) Warning
435 Warn about implicit conversions from \"float\" to \"double\"
437 Wimplicit-function-declaration
438 C UPC ObjC Var(warn_implicit_function_declaration) Init(-1) Warning LangEnabledBy(C UPC ObjC,Wimplicit)
439 Warn about implicit function declarations
442 C UPC ObjC Var(warn_implicit_int) Warning LangEnabledBy(C UPC ObjC,Wimplicit)
443 Warn when a declaration does not specify a type
446 C UPC ObjC C++ ObjC++ Undocumented Ignore
448 Winherited-variadic-ctor
449 C++ ObjC++ Var(warn_inh_var_ctor) Init(1) Warning
450 Warn about C++11 inheriting constructors when the base has a variadic constructor
453 C UPC ObjC C++ ObjC++ Var(warn_int_to_pointer_cast) Init(1) Warning
454 Warn when there is a cast to a pointer from an integer of a different size
457 C++ ObjC++ Var(warn_invalid_offsetof) Init(1) Warning
458 Warn about invalid uses of the \"offsetof\" macro
461 C UPC ObjC C++ ObjC++ Warning
462 Warn about PCH files that are found but not used
465 C UPC ObjC Var(warn_jump_misses_init) Warning LangEnabledby(C UPC ObjC,Wc++-compat)
466 Warn when a jump misses a variable initialization
470 Warn when a string or character literal is followed by a ud-suffix which does not begin with an underscore.
473 C UPC ObjC C++ ObjC++ Var(warn_logical_op) Init(0) Warning
474 Warn when a logical operator is suspiciously always evaluating to true or false
477 C UPC ObjC C++ ObjC++ Var(warn_long_long) Init(-1) Warning
478 Do not warn about using \"long long\" when -pedantic
481 C UPC ObjC C++ ObjC++ Var(warn_main) Init(-1) Warning LangEnabledBy(C UPC ObjC,Wall, 2, 0)
482 Warn about suspicious declarations of \"main\"
485 LangEnabledBy(C UPC ObjC C++ ObjC++,Wpedantic, 2, 0)
489 C UPC ObjC C++ ObjC++ Var(warn_missing_braces) Warning LangEnabledBy(C UPC ObjC,Wall)
490 Warn about possibly missing braces around initializers
492 Wmissing-declarations
493 C UPC ObjC C++ ObjC++ Var(warn_missing_declarations) Warning
494 Warn about global functions without previous declarations
496 Wmissing-field-initializers
497 C UPC ObjC C++ ObjC++ Var(warn_missing_field_initializers) Warning EnabledBy(Wextra)
498 Warn about missing fields in struct initializers
500 Wsizeof-pointer-memaccess
501 C UPC ObjC C++ ObjC++ Var(warn_sizeof_pointer_memaccess) Warning LangEnabledBy(C UPC ObjC C++ ObjC++,Wall)
503 Wsuggest-attribute=format
504 C UPC ObjC C++ ObjC++ Var(warn_suggest_attribute_format) Warning
505 Warn about functions which might be candidates for format attributes
508 C UPC ObjC C++ ObjC++ Var(warn_switch) Warning LangEnabledBy(C UPC ObjC C++ ObjC++,Wall)
509 Warn about enumerated switches, with no default, missing a case
512 C UPC ObjC C++ ObjC++ Var(warn_switch_default) Warning
513 Warn about enumerated switches missing a \"default:\" statement
516 C UPC ObjC C++ ObjC++ Var(warn_switch_enum) Warning
517 Warn about all enumerated switches missing a specific case
519 Wmissing-format-attribute
520 C UPC ObjC C++ ObjC++ Alias(Wsuggest-attribute=format)
523 Wmissing-include-dirs
524 C UPC ObjC C++ ObjC++ Warning
525 Warn about user-specified include directories that do not exist
527 Wmissing-parameter-type
528 C UPC ObjC Var(warn_missing_parameter_type) Warning EnabledBy(Wextra)
529 Warn about function parameters declared without a type specifier in K&R-style functions
532 C UPC ObjC Var(warn_missing_prototypes) Warning
533 Warn about global functions without prototypes
536 C UPC ObjC C++ ObjC++ Var(warn_mudflap) Init(1) Warning
537 Warn about constructs not instrumented by -fmudflap
540 C UPC ObjC C++ ObjC++ Warning
541 Warn about use of multi-character character constants
544 C UPC ObjC C++ ObjC++ Warning Var(warn_narrowing) Init(-1) LangEnabledBy(C++ ObjC++,Wall)
545 Warn about narrowing conversions within { } that are ill-formed in C++11
548 C UPC ObjC C++ ObjC++ LangEnabledBy(C++ ObjC++,Wc++0x-compat)
552 C UPC ObjC Var(warn_nested_externs) Warning
553 Warn about \"extern\" declarations not at file scope
556 C++ ObjC++ Var(warn_noexcept) Warning
557 Warn when a noexcept expression evaluates to false even though the expression can't actually throw
560 C++ ObjC++ Var(warn_nontemplate_friend) Init(1) Warning
561 Warn when non-templatized friend functions are declared within a template
564 C++ ObjC++ Var(warn_nonvdtor) Warning
565 Warn about non-virtual destructors
568 C UPC ObjC C++ ObjC++ Var(warn_nonnull) Warning LangEnabledBy(C UPC ObjC C++ ObjC++,Wformat=,warn_format >= 1,0)
569 Warn about NULL being passed to argument slots marked as requiring non-NULL
572 C UPC ObjC C++ ObjC++ LangEnabledBy(C UPC ObjC C++ ObjC++,Wall)
576 C UPC ObjC C++ ObjC++ Joined Warning
577 -Wnormalized=<id|nfc|nfkc> Warn about non-normalised Unicode strings
580 C++ ObjC++ Var(warn_old_style_cast) Warning
581 Warn if a C-style cast is used in a program
583 Wold-style-declaration
584 C UPC ObjC Var(warn_old_style_declaration) Warning EnabledBy(Wextra)
585 Warn for obsolescent usage in a declaration
587 Wold-style-definition
588 C UPC ObjC Var(warn_old_style_definition) Warning
589 Warn if an old-style parameter definition is used
592 C UPC ObjC C++ ObjC++ Var(warn_overlength_strings) Warning LangEnabledBy(C UPC ObjC C++ ObjC++,Wpedantic)
593 Warn if a string is longer than the maximum portable length specified by the standard
596 C++ ObjC++ Var(warn_overloaded_virtual) Warning
597 Warn about overloaded virtual function names
600 C UPC ObjC Var(warn_override_init) Warning EnabledBy(Wextra)
601 Warn about overriding initializers without side effects
603 Wpacked-bitfield-compat
604 C UPC ObjC C++ ObjC++ Var(warn_packed_bitfield_compat) Init(-1) Warning
605 Warn about packed bit-fields whose offset changed in GCC 4.4
608 C UPC ObjC C++ ObjC++ Var(warn_parentheses) Warning LangEnabledBy(C UPC ObjC C++ ObjC++,Wall)
609 Warn about possibly missing parentheses
612 C UPC ObjC C++ ObjC++ Warning
613 ; Documented in common.opt
616 C++ ObjC++ Var(warn_pmf2ptr) Init(1) Warning
617 Warn when converting the type of pointers to member functions
620 C UPC ObjC C++ ObjC++ Var(warn_pointer_arith) Warning
621 Warn about function pointer arithmetic
624 C UPC ObjC Var(warn_pointer_sign) Warning LangEnabledBy(C UPC ObjC,Wall)
625 Warn when a pointer differs in signedness in an assignment
628 C UPC ObjC LangEnabledBy(C UPC ObjC,Wpedantic)
632 C UPC ObjC Var(warn_pointer_to_int_cast) Init(1) Warning
633 Warn when a pointer is cast to an integer of a different size
636 C UPC ObjC C++ ObjC++ Var(warn_pragmas) Init(1) Warning
637 Warn about misuses of pragmas
639 Wproperty-assign-default
640 ObjC ObjC++ Var(warn_property_assign_default) Init(1) Warning
641 Warn if a property for an Objective-C object has no assign semantics specified
644 ObjC ObjC++ Var(warn_protocol) Init(1) Warning
645 Warn if inherited methods are unimplemented
648 C UPC ObjC C++ ObjC++ Var(warn_redundant_decls) Warning
649 Warn about multiple declarations of the same object
652 C++ ObjC++ Var(warn_reorder) Warning LangEnabledBy(C++ ObjC++,Wall)
653 Warn when the compiler reorders code
656 C UPC ObjC C++ ObjC++ Var(warn_return_local_addr) Init(1) Warning
657 Warn about returning a pointer/reference to a local or temporary variable.
660 C UPC ObjC C++ ObjC++ Var(warn_return_type) Warning LangEnabledBy(C UPC ObjC C++ ObjC++,Wall)
661 Warn whenever a function's return type defaults to \"int\" (C), or about inconsistent return types (C++)
664 ObjC ObjC++ Var(warn_selector) Warning
665 Warn if a selector has multiple methods
668 C UPC ObjC C++ ObjC++ Var(warn_sequence_point) Warning LangEnabledBy(C UPC ObjC C++ ObjC++,Wall)
669 Warn about possible violations of sequence point rules
672 C UPC ObjC C++ ObjC++ Var(warn_sign_compare) Warning LangEnabledBy(C++ ObjC++,Wall)
673 Warn about signed-unsigned comparisons
676 C UPC ObjC C++ ObjC++ EnabledBy(Wextra)
680 C UPC ObjC C++ ObjC++ Var(warn_sign_conversion) LangEnabledBy(C UPC ObjC,Wconversion)
681 Warn for implicit type conversions between signed and unsigned integers
684 C++ ObjC++ Var(warn_sign_promo) Warning
685 Warn when overload promotes from unsigned to signed
687 Wstrict-null-sentinel
688 C++ ObjC++ Warning Var(warn_strict_null_sentinel)
689 Warn about uncasted NULL used as sentinel
692 C UPC ObjC Var(warn_strict_prototypes) Warning
693 Warn about unprototyped function declarations
696 C UPC ObjC C++ ObjC++ LangEnabledBy(C UPC ObjC C++ ObjC++,Wall, 3, 0)
700 C UPC ObjC C++ ObjC++ LangEnabledBy(C UPC ObjC C++ ObjC++,Wall, 1, 0)
703 Wstrict-selector-match
704 ObjC ObjC++ Var(warn_strict_selector_match) Warning
705 Warn if type signatures of candidate methods do not match exactly
708 C UPC C++ Var(warn_sync_nand) Init(1) Warning
709 Warn when __sync_fetch_and_nand and __sync_nand_and_fetch built-in functions are used
712 C++ ObjC++ Var(warn_synth) Warning
713 Deprecated. This switch has no effect
716 C UPC ObjC C++ ObjC++ Warning
717 ; Documented in common.opt
720 C UPC ObjC Var(warn_traditional) Warning
721 Warn about features not present in traditional C
723 Wtraditional-conversion
724 C UPC ObjC Var(warn_traditional_conversion) Warning
725 Warn of prototypes causing type conversions different from what would happen in the absence of prototype
728 C UPC ObjC C++ ObjC++ Warning
729 Warn if trigraphs are encountered that might affect the meaning of the program
732 ObjC ObjC++ Var(warn_undeclared_selector) Warning
733 Warn about @selector()s without previously declared methods
736 C UPC ObjC C++ ObjC++ Warning
737 Warn if an undefined macro is used in an #if directive
740 C UPC ObjC C++ ObjC++ LangEnabledBy(C UPC ObjC C++ ObjC++,Wall)
744 C UPC ObjC C++ ObjC++ LangEnabledBy(C UPC ObjC C++ ObjC++,Wall)
748 C UPC ObjC C++ ObjC++ Warning Var(warn_unknown_pragmas) LangEnabledBy(C UPC ObjC C++ ObjC++,Wall, 1, 0)
749 Warn about unrecognized pragmas
751 Wunsuffixed-float-constants
752 C UPC ObjC Var(warn_unsuffixed_float_constants) Warning
753 Warn about unsuffixed float constants
756 C UPC ObjC C++ ObjC++ LangEnabledBy(C UPC ObjC C++ ObjC++,Wall)
757 ; documented in common.opt
759 Wunused-local-typedefs
760 C UPC ObjC C++ ObjC++ Var(warn_unused_local_typedefs) Warning EnabledBy(Wunused)
761 Warn when typedefs locally defined in a function are not used
764 C UPC ObjC C++ ObjC++ Var(cpp_warn_unused_macros) Warning
765 Warn about macros defined in the main file that are not used
768 C UPC ObjC C++ ObjC++ Var(warn_unused_result) Init(1) Warning
769 Warn if a caller of a function, marked with attribute warn_unused_result, does not use its return value
772 C UPC ObjC C++ ObjC++ Var(cpp_warn_variadic_macros) Init(1) Warning
773 Warn about using variadic macros
776 C UPC ObjC C++ ObjC++ Warning Var(warn_varargs) Init(1)
777 Warn about questionable usage of the macros used to retrieve variable arguments
780 C UPC ObjC C++ ObjC++ Var(warn_vla) Init(-1) Warning
781 Warn if a variable length array is used
783 Wvolatile-register-var
784 C UPC ObjC C++ ObjC++ Var(warn_volatile_register_var) Warning LangEnabledBy(C UPC ObjC C++ ObjC++,Wall)
785 Warn when a register variable is declared volatile
788 C++ ObjC++ Var(warn_virtual_move_assign) Warning Init(1)
789 Warn if a virtual base has a non-trivial move assignment operator
792 C UPC ObjC C++ ObjC++ Var(warn_write_strings) Warning
793 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.
795 Wzero-as-null-pointer-constant
796 C++ ObjC++ Var(warn_zero_as_null_pointer_constant) Warning
797 Warn when a literal '0' is used as null pointer
800 C++ ObjC++ Var(warn_useless_cast) Warning
801 Warn about useless casts
804 C UPC ObjC C++ ObjC++
805 A synonym for -std=c89 (for C) or -std=c++98 (for C++)
808 C UPC ObjC C++ ObjC++ Joined
809 ; Documented in common.opt. FIXME - what about -dI, -dD, -dN and -dD?
813 Generate DWARF-2 debug info with UPC extensions
816 C++ ObjC++ Var(flag_access_control) Init(1)
817 Enforce class member access control semantics
820 C UPC ObjC C++ ObjC++ RejectNegative Joined Var(ada_specs_parent)
821 -fada-spec-parent=unit Dump Ada specs as child units of given parent
824 C++ ObjC++ Ignore Warn(switch %qs is no longer supported)
826 fallow-parameterless-variadic-functions
827 C UPC ObjC Var(flag_allow_parameterless_variadic_functions)
828 Allow variadic functions without named parameter
830 falt-external-templates
831 C++ ObjC++ Ignore Warn(switch %qs is no longer supported)
835 C UPC ObjC C++ ObjC++ Var(flag_no_asm, 0)
836 Recognize the \"asm\" keyword
838 ; Define extra predefined macros for use in libgcc.
840 C UPC ObjC C++ ObjC++ Undocumented Var(flag_building_libgcc)
843 C UPC ObjC C++ ObjC++ Var(flag_no_builtin, 0)
844 Recognize built-in functions
847 C UPC ObjC C++ ObjC++ Joined
849 fcanonical-system-headers
851 Where shorter, use canonicalized paths to systems headers.
854 C++ ObjC++ Var(flag_check_new)
855 Check the return value of new
858 C UPC ObjC C++ ObjC++
859 Allow the arguments of the '?' operator to have different types
862 C++ ObjC++ Var(flag_conserve_space)
863 Does nothing. Preserved for backward compatibility.
865 fconstant-string-class=
866 ObjC ObjC++ Joined MissingArgError(no class name specified with %qs)
867 -fconst-string-class=<name> Use class <name> for constant strings
870 C++ ObjC++ Joined RejectNegative UInteger Var(max_constexpr_depth) Init(512)
871 -fconstexpr-depth=<number> Specify maximum constexpr recursion depth
874 C UPC ObjC C++ ObjC++
875 Emit debug annotations during preprocessing
878 C++ ObjC++ Var(flag_deduce_init_list) Init(0)
879 -fdeduce-init-list enable deduction of std::initializer_list for a template type parameter from a brace-enclosed initializer-list
883 Does nothing. Preserved for backward compatibility.
886 C UPC ObjC C++ ObjC++
887 Preprocess directives only.
889 fdollars-in-identifiers
890 C UPC ObjC C++ ObjC++
891 Permit '$' as an identifier character
894 C UPC ObjC C++ ObjC++ RejectNegative Var(flag_dump_ada_spec)
895 Write all declarations as Ada code transitively
898 C UPC ObjC C++ ObjC++ RejectNegative Var(flag_dump_ada_spec_slim)
899 Write all declarations as Ada code for the given file only
902 C++ ObjC++ Var(flag_elide_constructors) Init(1)
905 C++ ObjC++ Var(flag_enforce_eh_specs) Init(1)
906 Generate code to check exception specifications
909 C++ ObjC++ Ignore Warn(switch %qs is no longer supported)
912 C UPC ObjC C++ ObjC++ Joined RejectNegative
913 -fexec-charset=<cset> Convert all strings and character constants to character set <cset>
915 fextended-identifiers
916 C UPC ObjC C++ ObjC++
917 Permit universal character names (\\u and \\U) in identifiers
920 C UPC ObjC C++ ObjC++ Joined RejectNegative
921 -finput-charset=<cset> Specify the default character set for source files
924 C++ ObjC++ Var(flag_extern_tls_init) Init(-1)
925 Support dynamic initialization of thread-local variables in a different translation unit
928 C++ ObjC++ Ignore Warn(switch %qs is no longer supported)
931 C++ ObjC++ Var(flag_new_for_scope) Init(1)
932 Scope of for-init-statement variables is local to the loop
935 C UPC ObjC C++ ObjC++
936 Do not assume that standard C libraries and \"main\" exist
939 C++ ObjC++ Var(flag_no_gnu_keywords, 0)
940 Recognize GNU-defined keywords
943 ObjC ObjC++ Report RejectNegative Var(flag_next_runtime,0) Init(NEXT_OBJC_RUNTIME)
944 Generate code for GNU runtime environment
947 C UPC ObjC Var(flag_gnu89_inline) Init(-1)
948 Use traditional GNU semantics for inline functions
951 C++ ObjC++ Ignore Warn(switch %qs is no longer supported)
954 C++ ObjC++ Optimization Alias(fexceptions) Warn({-fhandle-exceptions has been renamed -fexceptions (and is now on by default)})
957 C++ ObjC++ Ignore Warn(switch %qs is no longer supported)
961 Assume normal C execution environment
964 C++ ObjC++ Ignore Warn(switch %qs is no longer supported)
968 C++ ObjC++ Var(flag_implement_inlines) Init(1)
969 Export functions even if they can be inlined
971 fimplicit-inline-templates
972 C++ ObjC++ Var(flag_implicit_inline_templates) Init(1)
973 Emit implicit instantiations of inline templates
976 C++ ObjC++ Var(flag_implicit_templates) Init(1)
977 Emit implicit instantiations of templates
980 C++ ObjC++ Var(flag_friend_injection)
981 Inject friend functions into enclosing namespace
983 fkeep-inline-dllexport
984 C UPC C++ ObjC ObjC++ Var(flag_keep_inline_dllexport) Init(1) Report Condition(TARGET_DLLIMPORT_DECL_ATTRIBUTES)
985 Don't emit dllexported inline functions unless needed
988 C++ ObjC++ Ignore Warn(switch %qs is no longer supported)
990 flax-vector-conversions
991 C UPC ObjC C++ ObjC++ Var(flag_lax_vector_conversions)
992 Allow implicit conversions between vectors with differing numbers of subparts and/or differing element types.
995 C UPC ObjC C++ ObjC++ Var(flag_ms_extensions)
996 Don't warn about uses of Microsoft extensions
999 C UPC ObjC C++ ObjC++ RejectNegative Report Var(flag_mudflap)
1000 Add mudflap bounds-checking instrumentation for single-threaded program
1003 C UPC ObjC C++ ObjC++ RejectNegative Report Var(flag_mudflap,2)
1004 Add mudflap bounds-checking instrumentation for multi-threaded program
1007 C UPC ObjC C++ ObjC++ RejectNegative Report Var(flag_mudflap_ignore_reads)
1008 Ignore read operations when inserting mudflap instrumentation
1010 fname-mangling-version-
1011 C++ ObjC++ Joined Ignore Warn(switch %qs is no longer supported)
1014 C++ ObjC++ Ignore Warn(switch %qs is no longer supported)
1017 ObjC ObjC++ Report RejectNegative Var(flag_next_runtime)
1018 Generate code for NeXT (Apple Mac OS X) runtime environment
1021 ObjC ObjC++ Var(flag_nil_receivers) Init(1)
1022 Assume that receivers of Objective-C messages may be nil
1025 C++ ObjC++ Var(flag_no_nonansi_builtin, 0)
1028 C++ ObjC++ Ignore Warn(switch %qs is no longer supported)
1031 C++ ObjC++ Optimization Var(flag_nothrow_opt)
1032 Treat a throw() exception specification as noexcept to improve code size
1035 ObjC ObjC++ Joined Report RejectNegative UInteger Var(flag_objc_abi)
1036 Specify which ABI to use for Objective-C family code and meta-data generation.
1038 ; Generate special '- .cxx_construct' and '- .cxx_destruct' methods
1039 ; to initialize any non-POD ivars in Objective-C++ classes.
1040 fobjc-call-cxx-cdtors
1041 ObjC++ Var(flag_objc_call_cxx_cdtors)
1042 Generate special Objective-C methods to initialize/destroy non-POD C++ ivars, if needed
1044 fobjc-direct-dispatch
1045 ObjC ObjC++ Var(flag_objc_direct_dispatch)
1046 Allow fast jumps to the message dispatcher
1048 ; Nonzero means that we will allow new ObjC exception syntax (@throw,
1049 ; @try, etc.) in source code.
1051 ObjC ObjC++ Var(flag_objc_exceptions)
1052 Enable Objective-C exception and synchronization syntax
1055 ObjC ObjC++ Var(flag_objc_gc)
1056 Enable garbage collection (GC) in Objective-C/Objective-C++ programs
1059 ObjC ObjC++ Var(flag_objc_nilcheck,1)
1060 Enable inline checks for nil receivers with the NeXT runtime and ABI version 2.
1062 ; Nonzero means that we generate NeXT setjmp based exceptions.
1063 fobjc-sjlj-exceptions
1064 ObjC ObjC++ Var(flag_objc_sjlj_exceptions) Init(-1)
1065 Enable Objective-C setjmp exception handling runtime
1068 ObjC ObjC++ Var(flag_objc1_only)
1069 Conform to the Objective-C 1.0 language as implemented in GCC 4.0
1072 C UPC ObjC C++ ObjC++ Var(flag_openmp)
1073 Enable OpenMP (implies -frecursive in Fortran)
1077 Recognize C++ keywords like \"compl\" and \"xor\"
1081 Does nothing. Preserved for backward compatibility.
1084 C UPC ObjC C++ ObjC++
1087 C UPC ObjC C++ ObjC++
1088 Look for and use PCH files even when preprocessing
1091 C++ ObjC++ Var(flag_permissive)
1092 Downgrade conformance errors to warnings
1095 C UPC ObjC Var(flag_plan9_extensions)
1096 Enable Plan 9 language extensions
1099 C UPC ObjC C++ ObjC++
1100 Treat the input file as already preprocessed
1102 ftrack-macro-expansion
1103 C UPC ObjC C++ ObjC++ JoinedOrMissing RejectNegative UInteger
1104 ; converted into ftrack-macro-expansion=
1106 ftrack-macro-expansion=
1107 C UPC ObjC C++ ObjC++ JoinedOrMissing RejectNegative UInteger
1108 -ftrack-macro-expansion=<0|1|2> Track locations of tokens coming from macro expansion and display them in error messages
1111 C++ ObjC++ Var(flag_pretty_templates) Init(1)
1112 -fno-pretty-templates Do not pretty-print template specializations as the template signature followed by the arguments
1114 freplace-objc-classes
1115 ObjC ObjC++ Var(flag_replace_objc_classes)
1116 Used in Fix-and-Continue mode to indicate that object files may be swapped in at runtime
1120 Enable automatic template instantiation
1123 C++ ObjC++ Optimization Var(flag_rtti) Init(1)
1124 Generate run time type descriptor information
1127 C UPC ObjC C++ ObjC++ Optimization Var(flag_short_double)
1128 Use the same size for double as for float
1131 C UPC ObjC C++ ObjC++ Optimization Var(flag_short_enums)
1132 Use the narrowest integer type possible for enumeration types
1135 C UPC ObjC C++ ObjC++ Optimization Var(flag_short_wchar)
1136 Force the underlying type for \"wchar_t\" to be \"unsigned short\"
1139 C UPC ObjC C++ ObjC++ Var(flag_signed_bitfields) Init(1)
1140 When \"signed\" or \"unsigned\" is not given make the bitfield signed
1143 C UPC ObjC C++ ObjC++ LTO Var(flag_signed_char)
1144 Make \"char\" signed by default
1147 C++ ObjC++ Ignore Warn(switch %qs is no longer supported)
1150 C++ ObjC++ Var(flag_detailed_statistics)
1151 Display statistics accumulated during compilation
1154 C++ ObjC++ Optimization Var(flag_strict_enums)
1155 Assume that values of enumeration type are always within the minimum range of that type
1158 C++ ObjC++ Ignore Warn(switch %qs is no longer supported)
1161 C UPC ObjC C++ ObjC++ Joined RejectNegative UInteger
1162 -ftabstop=<number> Distance between tab stops for column reporting
1164 ftemplate-backtrace-limit=
1165 C++ ObjC++ Joined RejectNegative UInteger Var(template_backtrace_limit) Init(10)
1166 Set the maximum number of template instantiation notes for a single warning or error
1169 C++ ObjC++ Joined RejectNegative Undocumented Alias(ftemplate-depth=)
1172 C++ ObjC++ Joined RejectNegative UInteger
1173 -ftemplate-depth=<number> Specify maximum template instantiation depth
1176 C++ ObjC++ Ignore Warn(switch %qs is no longer supported)
1179 C++ ObjC++ Optimization Var(flag_threadsafe_statics) Init(1)
1180 -fno-threadsafe-statics Do not generate thread-safe code for initializing local statics
1183 C UPC ObjC C++ ObjC++ Var(flag_signed_bitfields, 0)
1184 When \"signed\" or \"unsigned\" is not given make the bitfield unsigned
1187 C UPC ObjC C++ ObjC++ LTO Var(flag_signed_char, 0)
1188 Make \"char\" unsigned by default
1191 UPC Var(flag_upc_debug) VarExists
1192 Generate code that provides the UPC runtime with
1193 the file and line number where the runtime was called.
1196 UPC Var(flag_upc_inline_lib) VarExists
1197 Generate code for inlined UPC runtime library routines.
1198 Default, at optimization levels greater than 0.
1202 Enable UPC linker specs for upc-crtbegin/upc-crtend
1206 Pre-include UPC runtime header file
1208 fupc-pthreads-model-tls
1210 Generate code for a POSIX threads based UPC runtime environment
1211 with TLS (Thread Local Storage) support
1214 UPC Joined RejectNegative UInteger
1215 Specify the compile-time value of THREADS
1218 C UPC Var(flag_upc_instrument) VarExists
1219 Instrument UPC shared accesses and library calls, using GASP tool support
1221 fupc-instrument-functions
1222 C UPC Var(flag_upc_instrument_functions) VarExists
1223 Instrument functions calls, using GASP tool support (implies -fupc-instrument)
1226 C++ ObjC++ Var(flag_use_cxa_atexit) Init(DEFAULT_USE_CXA_ATEXIT)
1227 Use __cxa_atexit to register destructors
1229 fuse-cxa-get-exception-ptr
1230 C++ ObjC++ Var(flag_use_cxa_get_exception_ptr) Init(2)
1231 Use __cxa_get_exception_ptr in exception handling
1233 fvisibility-inlines-hidden
1235 Marks all inlined functions and methods as having hidden visibility
1237 fvisibility-ms-compat
1238 C++ ObjC++ Var(flag_visibility_ms_compat)
1239 Changes visibility to match Microsoft Visual Studio by default
1242 C++ ObjC++ Ignore Warn(switch %qs is no longer supported)
1246 C++ ObjC++ Ignore Warn(switch %qs is no longer supported)
1250 C++ ObjC++ Var(flag_weak) Init(1)
1251 Emit common-like symbols as weak symbols
1254 C UPC ObjC C++ ObjC++ Joined RejectNegative
1255 -fwide-exec-charset=<cset> Convert all wide strings and character constants to character set <cset>
1258 C UPC ObjC C++ ObjC++ Var(flag_working_directory) Init(-1)
1259 Generate a #line directive pointing at the current working directory
1262 C++ ObjC++ Ignore Warn(switch %qs is no longer supported)
1266 ObjC ObjC++ Var(flag_zero_link)
1267 Generate lazy class lookup (via objc_getClass()) for use in Zero-Link mode
1270 ObjC ObjC++ Var(flag_gen_declaration)
1271 Dump declarations to a .decl file
1273 femit-struct-debug-baseonly
1274 C UPC ObjC C++ ObjC++
1275 -femit-struct-debug-baseonly Aggressive reduced debug info for structs
1277 femit-struct-debug-reduced
1278 C UPC ObjC C++ ObjC++
1279 -femit-struct-debug-reduced Conservative reduced debug info for structs
1281 femit-struct-debug-detailed=
1282 C UPC ObjC C++ ObjC++ Joined
1283 -femit-struct-debug-detailed=<spec-list> Detailed reduced debug info for structs
1285 fext-numeric-literals
1287 Interpret imaginary, fixed-point, or other gnu number suffix as the corresponding
1288 number literal rather than a user-defined number literal.
1291 C UPC ObjC C++ ObjC++ Joined Separate MissingArgError(missing path after %qs)
1292 -idirafter <dir> Add <dir> to the end of the system include path
1295 C UPC ObjC C++ ObjC++ Joined Separate MissingArgError(missing filename after %qs)
1296 -imacros <file> Accept definition of macros in <file>
1299 C UPC ObjC C++ ObjC++ Joined Separate
1300 -imultilib <dir> Set <dir> to be the multilib include subdirectory
1303 C UPC ObjC C++ ObjC++ Joined Separate MissingArgError(missing filename after %qs)
1304 -include <file> Include the contents of <file> before other files
1307 C UPC ObjC C++ ObjC++ Joined Separate
1308 -iprefix <path> Specify <path> as a prefix for next two options
1311 C UPC ObjC C++ ObjC++ Joined Separate MissingArgError(missing path after %qs)
1312 -isysroot <dir> Set <dir> to be the system root directory
1315 C UPC ObjC C++ ObjC++ Joined Separate MissingArgError(missing path after %qs)
1316 -isystem <dir> Add <dir> to the start of the system include path
1319 C UPC ObjC C++ ObjC++ Joined Separate MissingArgError(missing path after %qs)
1320 -iquote <dir> Add <dir> to the end of the quote include path
1323 C UPC ObjC C++ ObjC++ Joined Separate
1324 -iwithprefix <dir> Add <dir> to the end of the system include path
1327 C UPC ObjC C++ ObjC++ Joined Separate
1328 -iwithprefixbefore <dir> Add <dir> to the end of the main include path
1331 C Undocumented RejectDriver
1340 C UPC ObjC C++ ObjC++
1341 Do not search standard system include directories (those specified with -isystem will still be used)
1345 Do not search standard system include directories for C++
1348 C UPC ObjC C++ ObjC++ Joined Separate
1349 ; Documented in common.opt
1352 C UPC ObjC C++ ObjC++ Alias(Wpedantic)
1353 ; Documented in common.opt
1355 print-objc-runtime-info
1357 Generate C header of platform-specific features
1360 C UPC ObjC C++ ObjC++
1361 Remap file names when including files
1365 Conform to the ISO 1998 C++ standard revised by the 2003 technical corrigendum
1368 C++ ObjC++ Alias(std=c++98)
1369 Conform to the ISO 1998 C++ standard revised by the 2003 technical corrigendum
1373 Conform to the ISO 2011 C++ standard (experimental and incomplete support)
1376 C++ ObjC++ Alias(std=c++11)
1377 Deprecated in favor of -std=c++11
1381 Conform to the ISO 201y(7?) C++ draft standard (experimental and incomplete support)
1385 Conform to the ISO 2011 C standard (experimental and incomplete support)
1388 C UPC ObjC Alias(std=c11)
1389 Deprecated in favor of -std=c11
1392 C UPC ObjC Alias(std=c90)
1393 Conform to the ISO 1990 C standard
1397 Conform to the ISO 1990 C standard
1401 Conform to the ISO 1999 C standard
1404 C UPC ObjC Alias(std=c99)
1405 Deprecated in favor of -std=c99
1409 Conform to the ISO 1998 C++ standard revised by the 2003 technical
1410 corrigendum with GNU extensions
1413 C++ ObjC++ Alias(std=gnu++98)
1414 Conform to the ISO 1998 C++ standard revised by the 2003 technical
1415 corrigendum with GNU extensions
1419 Conform to the ISO 2011 C++ standard with GNU extensions (experimental and incomplete support)
1422 C++ ObjC++ Alias(std=gnu++11)
1423 Deprecated in favor of -std=gnu++11
1427 Conform to the ISO 201y(7?) C++ draft standard with GNU extensions (experimental and incomplete support)
1431 Conform to the ISO 2011 C standard with GNU extensions (experimental and incomplete support)
1434 C UPC ObjC Alias(std=gnu11)
1435 Deprecated in favor of -std=gnu11
1438 C UPC ObjC Alias(std=gnu90)
1439 Conform to the ISO 1990 C standard with GNU extensions
1443 Conform to the ISO 1990 C standard with GNU extensions
1447 Conform to the ISO 1999 C standard with GNU extensions
1450 C UPC ObjC Alias(std=gnu99)
1451 Deprecated in favor of -std=gnu99
1454 C UPC ObjC Alias(std=c90)
1455 Conform to the ISO 1990 C standard
1459 Conform to the ISO 1990 C standard as amended in 1994
1462 C UPC ObjC Alias(std=c99)
1463 Conform to the ISO 1999 C standard
1466 C UPC ObjC Alias(std=c99)
1467 Deprecated in favor of -std=iso9899:1999
1470 C UPC ObjC Alias(std=c11)
1471 Conform to the ISO 2011 C standard (experimental and incomplete support)
1477 C UPC ObjC C++ ObjC++
1478 Enable traditional preprocessing
1481 C UPC ObjC C++ ObjC++
1482 -trigraphs Support ISO C trigraphs
1485 C UPC ObjC C++ ObjC++ Var(flag_undef)
1486 Do not predefine system-specific and GCC-specific macros
1489 C UPC ObjC C++ ObjC++
1490 ; Documented in common.opt
1493 C UPC ObjC C++ ObjC++
1494 ; Documented in common.opt
1496 ; This comment is to ensure we retain the blank line above.