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; Options for the C, ObjC, C++ and ObjC++ front ends.

; Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010,

; 2011, 2012 Free Software Foundation, Inc.

;

; This file is part of GCC.

;

; GCC is free software; you can redistribute it and/or modify it under

; the terms of the GNU General Public License as published by the Free

; Software Foundation; either version 3, or (at your option) any later

; version.

;

; GCC is distributed in the hope that it will be useful, but WITHOUT ANY

; WARRANTY; without even the implied warranty of MERCHANTABILITY or

; FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

; for more details.

;

; You should have received a copy of the GNU General Public License

; along with GCC; see the file COPYING3.  If not see

; .

; See the GCC internals manual for a description of this file's format.

; Please try to keep this file in ASCII collating order.

Language

C

Language

ObjC

Language

C++

Language

ObjC++

-all-warnings

C ObjC C++ ObjC++ Warning Alias(Wall)

-ansi

C ObjC C++ ObjC++ Alias(ansi)

-assert

C ObjC C++ ObjC++ Separate Alias(A) MissingArgError(assertion missing after %qs)

-assert=

C ObjC C++ ObjC++ Joined Alias(A) MissingArgError(assertion missing after %qs)

-comments

C ObjC C++ ObjC++ Alias(C)

-comments-in-macros

C ObjC C++ ObjC++ Alias(CC)

-define-macro

C ObjC C++ ObjC++ Separate Alias(D) MissingArgError(macro name missing after %qs)

-define-macro=

C ObjC C++ ObjC++ Joined Alias(D) MissingArgError(macro name missing after %qs)

-dependencies

C ObjC C++ ObjC++ Alias(M)

-dump

C ObjC C++ ObjC++ Separate Alias(d)

-dump=

C ObjC C++ ObjC++ Joined Alias(d)

-imacros

C ObjC C++ ObjC++ Separate Alias(imacros) MissingArgError(missing filename after %qs)

-imacros=

C ObjC C++ ObjC++ Joined Alias(imacros) MissingArgError(missing filename after %qs)

-include

C ObjC C++ ObjC++ Separate Alias(include) MissingArgError(missing filename after %qs)

-include=

C ObjC C++ ObjC++ Joined Alias(include) MissingArgError(missing filename after %qs)

-include-barrier

C ObjC C++ ObjC++ Alias(I, -)

-include-directory

C ObjC C++ ObjC++ Separate Alias(I) MissingArgError(missing path after %qs)

-include-directory=

C ObjC C++ ObjC++ Joined Alias(I) MissingArgError(missing path after %qs)

-include-directory-after

C ObjC C++ ObjC++ Separate Alias(idirafter) MissingArgError(missing path after %qs)

-include-directory-after=

C ObjC C++ ObjC++ Joined Alias(idirafter) MissingArgError(missing path after %qs)

-include-prefix

C ObjC C++ ObjC++ Separate Alias(iprefix)

-include-prefix=

C ObjC C++ ObjC++ JoinedOrMissing Alias(iprefix)

-include-with-prefix

C ObjC C++ ObjC++ Separate Alias(iwithprefix)

-include-with-prefix=

C ObjC C++ ObjC++ JoinedOrMissing Alias(iwithprefix)

-include-with-prefix-after

C ObjC C++ ObjC++ Separate Alias(iwithprefix)

-include-with-prefix-after=

C ObjC C++ ObjC++ JoinedOrMissing Alias(iwithprefix)

-include-with-prefix-before

C ObjC C++ ObjC++ Separate Alias(iwithprefixbefore)

-include-with-prefix-before=

C ObjC C++ ObjC++ JoinedOrMissing Alias(iwithprefixbefore)

-no-integrated-cpp

Driver Alias(no-integrated-cpp)

-no-line-commands

C ObjC C++ ObjC++ Alias(P)

-no-standard-includes

C ObjC C++ ObjC++ Alias(nostdinc)

-no-warnings

C ObjC C++ ObjC++ Alias(w)

-output

C ObjC C++ ObjC++ Separate Alias(o)

-output=

C ObjC C++ ObjC++ Joined Alias(o)

-output-pch=

C ObjC C++ ObjC++ Joined Separate

-pedantic

C ObjC C++ ObjC++ Alias(pedantic)

-pedantic-errors

C ObjC C++ ObjC++ Alias(pedantic-errors)

-preprocess

C ObjC C++ ObjC++ Undocumented Alias(E)

-print-missing-file-dependencies

C ObjC C++ ObjC++ Alias(MG)

-trace-includes

C ObjC C++ ObjC++ Alias(H)

-traditional

Driver Alias(traditional)

-traditional-cpp

C ObjC C++ ObjC++ Alias(traditional-cpp)

-trigraphs

C ObjC C++ ObjC++ Alias(trigraphs)

-undefine-macro

C ObjC C++ ObjC++ Separate Alias(U) MissingArgError(macro name missing after %qs)

-undefine-macro=

C ObjC C++ ObjC++ Joined Alias(U) MissingArgError(macro name missing after %qs)

-user-dependencies

C ObjC C++ ObjC++ Alias(MM)

-verbose

Common C ObjC C++ ObjC++ Alias(v)

-write-dependencies

C ObjC C++ ObjC++ NoDriverArg Separate Alias(MD) MissingArgError(missing filename after %qs)

-write-user-dependencies

C ObjC C++ ObjC++ NoDriverArg Separate Alias(MMD) MissingArgError(missing filename after %qs)

A

C ObjC C++ ObjC++ Joined Separate MissingArgError(assertion missing after %qs)

-A=     Assert the  to .  Putting '-' before  disables the  to 

C

C ObjC C++ ObjC++

Do not discard comments

CC

C ObjC C++ ObjC++

Do not discard comments in macro expansions

D

C ObjC C++ ObjC++ Joined Separate MissingArgError(macro name missing after %qs)

-D[=]   Define a  with  as its value.  If just  is given,  is taken to be 1

E

C ObjC C++ ObjC++ Undocumented Var(flag_preprocess_only)

F

Driver C ObjC C++ ObjC++ Joined Separate MissingArgError(missing path after %qs)

-F      Add  to the end of the main framework include path

H

C ObjC C++ ObjC++

Print the name of header files as they are used

I

C ObjC C++ ObjC++ Joined Separate MissingArgError(missing path after %qs)

-I      Add  to the end of the main include path

M

C ObjC C++ ObjC++

Generate make dependencies

MD

C ObjC C++ ObjC++ NoDriverArg Separate MissingArgError(missing filename after %qs)

Generate make dependencies and compile

MF

C ObjC C++ ObjC++ Joined Separate MissingArgError(missing filename after %qs)

-MF     Write dependency output to the given file

MG

C ObjC C++ ObjC++

Treat missing header files as generated files

MM

C ObjC C++ ObjC++

Like -M but ignore system header files

MMD

C ObjC C++ ObjC++ NoDriverArg Separate MissingArgError(missing filename after %qs)

Like -MD but ignore system header files

MP

C ObjC C++ ObjC++

Generate phony targets for all headers

MQ

C ObjC C++ ObjC++ Joined Separate MissingArgError(missing makefile target after %qs)

-MQ     Add a MAKE-quoted target

MT

C ObjC C++ ObjC++ Joined Separate MissingArgError(missing makefile target after %qs)

-MT     Add an unquoted target

P

C ObjC C++ ObjC++

Do not generate #line directives

U

C ObjC C++ ObjC++ Joined Separate MissingArgError(macro name missing after %qs)

-U      Undefine 

Wabi

C ObjC C++ ObjC++ LTO Var(warn_abi) Warning

Warn about things that will change when compiling with an ABI-compliant compiler

Wpsabi

C ObjC C++ ObjC++ LTO Var(warn_psabi) Init(1) Undocumented

Waddress

C ObjC C++ ObjC++ Var(warn_address) Warning

Warn about suspicious uses of memory addresses

Wall

C ObjC C++ ObjC++ Warning

Enable most warning messages

Wassign-intercept

ObjC ObjC++ Var(warn_assign_intercept) Warning

Warn whenever an Objective-C assignment is being intercepted by the garbage collector

Wbad-function-cast

C ObjC Var(warn_bad_function_cast) Warning

Warn about casting functions to incompatible types

Wbuiltin-macro-redefined

C ObjC C++ ObjC++ Warning

Warn when a built-in preprocessor macro is undefined or redefined

Wc++-compat

C ObjC Var(warn_cxx_compat) Warning

Warn about C constructs that are not in the common subset of C and C++

Wc++0x-compat

C++ ObjC++ Var(warn_cxx0x_compat) Warning

Deprecated in favor of -Wc++11-compat

Wc++11-compat

C++ ObjC++ Warning Alias(Wc++0x-compat)

Warn about C++ constructs whose meaning differs between ISO C++ 1998 and ISO C++ 2011

Wcast-qual

C ObjC C++ ObjC++ Var(warn_cast_qual) Warning

Warn about casts which discard qualifiers

Wchar-subscripts

C ObjC C++ ObjC++ Var(warn_char_subscripts) Warning

Warn about subscripts whose type is \"char\"

Wclobbered

C ObjC C++ ObjC++ Var(warn_clobbered) Init(-1) Warning

Warn about variables that might be changed by \"longjmp\" or \"vfork\"

Wcomment

C ObjC C++ ObjC++ Warning

Warn about possibly nested block comments, and C++ comments spanning more than one physical line

Wcomments

C ObjC C++ ObjC++ Warning Alias(Wcomment)

Synonym for -Wcomment

Wconversion

C ObjC C++ ObjC++ Var(warn_conversion) Warning

Warn for implicit type conversions that may change a value

Wconversion-null

C++ ObjC++ Var(warn_conversion_null) Init(1) Warning

Warn for converting NULL from/to a non-pointer type

Wsign-conversion

C ObjC C++ ObjC++ Var(warn_sign_conversion) Init(-1)

Warn for implicit type conversions between signed and unsigned integers

Wctor-dtor-privacy

C++ ObjC++ Var(warn_ctor_dtor_privacy) Warning

Warn when all constructors and destructors are private

Wdeclaration-after-statement

C ObjC Var(warn_declaration_after_statement) Warning

Warn when a declaration is found after a statement

Wdelete-non-virtual-dtor

C++ ObjC++ Var(warn_delnonvdtor) Warning

Warn about deleting polymorphic objects with non-virtual destructors

Wdeprecated

C C++ ObjC ObjC++ Var(warn_deprecated) Init(1) Warning

Warn if a deprecated compiler feature, class, method, or field is used

Wdiv-by-zero

C ObjC C++ ObjC++ Var(warn_div_by_zero) Init(1) Warning

Warn about compile-time integer division by zero

Weffc++

C++ ObjC++ Var(warn_ecpp) Warning

Warn about violations of Effective C++ style rules

Wempty-body

C ObjC C++ ObjC++ Var(warn_empty_body) Init(-1) Warning

Warn about an empty body in an if or else statement

Wendif-labels

C ObjC C++ ObjC++ Warning

Warn about stray tokens after #elif and #endif

Wenum-compare

C ObjC C++ ObjC++ Var(warn_enum_compare) Init(-1) Warning

Warn about comparison of different enum types

Werror

C ObjC C++ ObjC++

; Documented in common.opt

Werror-implicit-function-declaration

C ObjC RejectNegative Warning Alias(Werror=, implicit-function-declaration)

This switch is deprecated; use -Werror=implicit-function-declaration instead

Wfloat-equal

C ObjC C++ ObjC++ Var(warn_float_equal) Warning

Warn if testing floating point numbers for equality

Wformat

C ObjC C++ ObjC++ Warning

Warn about printf/scanf/strftime/strfmon format string anomalies

Wformat-extra-args

C ObjC C++ ObjC++ Var(warn_format_extra_args) Warning

Warn if passing too many arguments to a function for its format string

Wformat-nonliteral

C ObjC C++ ObjC++ Var(warn_format_nonliteral) Warning

Warn about format strings that are not literals

Wformat-contains-nul

C ObjC C++ ObjC++ Var(warn_format_contains_nul) Warning

Warn about format strings that contain NUL bytes

Wformat-security

C ObjC C++ ObjC++ Var(warn_format_security) Warning

Warn about possible security problems with format functions

Wformat-y2k

C ObjC C++ ObjC++ Var(warn_format_y2k) Warning

Warn about strftime formats yielding 2-digit years

Wformat-zero-length

C ObjC C++ ObjC++ Var(warn_format_zero_length) Warning

Warn about zero-length formats

Wformat=

C ObjC C++ ObjC++ Joined Warning

Wignored-qualifiers

C C++ Var(warn_ignored_qualifiers) Init(-1) Warning

Warn whenever type qualifiers are ignored.

Winit-self

C ObjC C++ ObjC++ Var(warn_init_self) Warning

Warn about variables which are initialized to themselves

Wimplicit

C ObjC Var(warn_implicit) Init(-1) Warning

Warn about implicit declarations

Wdouble-promotion

C ObjC C++ ObjC++ Var(warn_double_promotion) Warning

Warn about implicit conversions from \"float\" to \"double\"

Wimplicit-function-declaration

C ObjC Var(warn_implicit_function_declaration) Init(-1) Warning

Warn about implicit function declarations

Wimplicit-int

C ObjC Var(warn_implicit_int) Init(-1) Warning

Warn when a declaration does not specify a type

Wimport

C ObjC C++ ObjC++ Undocumented Ignore

Wint-to-pointer-cast

C ObjC C++ ObjC++ Var(warn_int_to_pointer_cast) Init(1) Warning

Warn when there is a cast to a pointer from an integer of a different size

Winvalid-offsetof

C++ ObjC++ Var(warn_invalid_offsetof) Init(1) Warning

Warn about invalid uses of the \"offsetof\" macro

Winvalid-pch

C ObjC C++ ObjC++ Warning

Warn about PCH files that are found but not used

Wjump-misses-init

C ObjC Var(warn_jump_misses_init) Init(-1) Warning

Warn when a jump misses a variable initialization

Wlogical-op

C ObjC C++ ObjC++ Var(warn_logical_op) Init(0) Warning

Warn when a logical operator is suspiciously always evaluating to true or false

Wlong-long

C ObjC C++ ObjC++ Var(warn_long_long) Init(-1) Warning

Do not warn about using \"long long\" when -pedantic

Wmain

C ObjC C++ ObjC++ Var(warn_main) Init(-1) Warning

Warn about suspicious declarations of \"main\"

Wmissing-braces

C ObjC C++ ObjC++ Var(warn_missing_braces) Warning

Warn about possibly missing braces around initializers

Wmissing-declarations

C ObjC C++ ObjC++ Var(warn_missing_declarations) Warning

Warn about global functions without previous declarations

Wmissing-field-initializers

C ObjC C++ ObjC++ Var(warn_missing_field_initializers) Init(-1) Warning

Warn about missing fields in struct initializers

Wmissing-format-attribute

C ObjC C++ ObjC++ Var(warn_missing_format_attribute) Warning

Warn about functions which might be candidates for format attributes

Wmissing-include-dirs

C ObjC C++ ObjC++ Warning

Warn about user-specified include directories that do not exist

Wmissing-parameter-type

C ObjC Var(warn_missing_parameter_type) Init(-1) Warning

Warn about function parameters declared without a type specifier in K&R-style functions

Wmissing-prototypes

C ObjC Var(warn_missing_prototypes) Warning

Warn about global functions without prototypes

Wmudflap

C ObjC C++ ObjC++ Var(warn_mudflap) Init(1) Warning

Warn about constructs not instrumented by -fmudflap

Wmultichar

C ObjC C++ ObjC++ Warning

Warn about use of multi-character character constants

Wnarrowing

C ObjC C++ ObjC++ Warning Var(warn_narrowing) Init(-1)

Warn about narrowing conversions within { } that are ill-formed in C++11

Wnested-externs

C ObjC Var(warn_nested_externs) Warning

Warn about \"extern\" declarations not at file scope

Wnoexcept

C++ ObjC++ Var(warn_noexcept) Warning

Warn when a noexcept expression evaluates to false even though the expression can't actually throw

Wnon-template-friend

C++ ObjC++ Var(warn_nontemplate_friend) Init(1) Warning

Warn when non-templatized friend functions are declared within a template

Wnon-virtual-dtor

C++ ObjC++ Var(warn_nonvdtor) Warning

Warn about non-virtual destructors

Wnonnull

C ObjC C++ ObjC++ Var(warn_nonnull) Warning

Warn about NULL being passed to argument slots marked as requiring non-NULL

Wnormalized=

C ObjC C++ ObjC++ Joined Warning

-Wnormalized=   Warn about non-normalised Unicode strings

Wold-style-cast

C++ ObjC++ Var(warn_old_style_cast) Warning

Warn if a C-style cast is used in a program

Wold-style-declaration

C ObjC Var(warn_old_style_declaration) Init(-1) Warning

Warn for obsolescent usage in a declaration

Wold-style-definition

C ObjC Var(warn_old_style_definition) Warning

Warn if an old-style parameter definition is used

Woverlength-strings

C ObjC C++ ObjC++ Var(warn_overlength_strings) Init(-1) Warning

Warn if a string is longer than the maximum portable length specified by the standard

Woverloaded-virtual

C++ ObjC++ Var(warn_overloaded_virtual) Warning

Warn about overloaded virtual function names

Woverride-init

C ObjC Var(warn_override_init) Init(-1) Warning

Warn about overriding initializers without side effects

Wpacked-bitfield-compat

C ObjC C++ ObjC++ Var(warn_packed_bitfield_compat) Init(-1) Warning

Warn about packed bit-fields whose offset changed in GCC 4.4

Wparentheses

C ObjC C++ ObjC++ Var(warn_parentheses) Warning

Warn about possibly missing parentheses

Wpmf-conversions

C++ ObjC++ Var(warn_pmf2ptr) Init(1) Warning

Warn when converting the type of pointers to member functions

Wpointer-arith

C ObjC C++ ObjC++ Var(warn_pointer_arith) Warning

Warn about function pointer arithmetic

Wpointer-to-int-cast

C ObjC Var(warn_pointer_to_int_cast) Init(1) Warning

Warn when a pointer is cast to an integer of a different size

Wpragmas

C ObjC C++ ObjC++ Var(warn_pragmas) Init(1) Warning

Warn about misuses of pragmas

Wproperty-assign-default

ObjC ObjC++ Var(warn_property_assign_default) Init(1) Warning

Warn if a property for an Objective-C object has no assign semantics specified

Wprotocol

ObjC ObjC++ Var(warn_protocol) Init(1) Warning

Warn if inherited methods are unimplemented

Wredundant-decls

C ObjC C++ ObjC++ Var(warn_redundant_decls) Warning

Warn about multiple declarations of the same object

Wreorder

C++ ObjC++ Var(warn_reorder) Warning

Warn when the compiler reorders code

Wreturn-type

C ObjC C++ ObjC++ Var(warn_return_type) Warning

Warn whenever a function's return type defaults to \"int\" (C), or about inconsistent return types (C++)

Wselector

ObjC ObjC++ Var(warn_selector) Warning

Warn if a selector has multiple methods

Wsequence-point

C ObjC C++ ObjC++ Var(warn_sequence_point) Warning

Warn about possible violations of sequence point rules

Wsign-compare

C ObjC C++ ObjC++ Var(warn_sign_compare) Init(-1) Warning

Warn about signed-unsigned comparisons

Wsign-promo

C++ ObjC++ Var(warn_sign_promo) Warning

Warn when overload promotes from unsigned to signed

Wstrict-null-sentinel

C++ ObjC++ Warning Var(warn_strict_null_sentinel)

Warn about uncasted NULL used as sentinel

Wstrict-prototypes

C ObjC Var(warn_strict_prototypes) Warning

Warn about unprototyped function declarations

Wstrict-selector-match

ObjC ObjC++ Var(warn_strict_selector_match) Warning

Warn if type signatures of candidate methods do not match exactly

Wsync-nand

C C++ Var(warn_sync_nand) Init(1) Warning

Warn when __sync_fetch_and_nand and __sync_nand_and_fetch built-in functions are used

Wsynth

C++ ObjC++ Var(warn_synth) Warning

Deprecated.  This switch has no effect

Wsystem-headers

C ObjC C++ ObjC++ Warning

; Documented in common.opt

Wtraditional

C ObjC Var(warn_traditional) Warning

Warn about features not present in traditional C

Wtraditional-conversion

C ObjC Var(warn_traditional_conversion) Warning

Warn of prototypes causing type conversions different from what would happen in the absence of prototype

Wtrigraphs

C ObjC C++ ObjC++ Warning

Warn if trigraphs are encountered that might affect the meaning of the program

Wundeclared-selector

ObjC ObjC++ Var(warn_undeclared_selector) Warning

Warn about @selector()s without previously declared methods

Wundef

C ObjC C++ ObjC++ Warning

Warn if an undefined macro is used in an #if directive

Wunknown-pragmas

C ObjC C++ ObjC++ Warning

Warn about unrecognized pragmas

Wunsuffixed-float-constants

C ObjC Var(warn_unsuffixed_float_constants) Warning

Warn about unsuffixed float constants

Wunused-local-typedefs

C ObjC C++ ObjC++ Var(warn_unused_local_typedefs) Warning

Warn when typedefs locally defined in a function are not used

Wunused-macros

C ObjC C++ ObjC++ Warning

Warn about macros defined in the main file that are not used

Wunused-result

C ObjC C++ ObjC++ Var(warn_unused_result) Init(1) Warning

Warn if a caller of a function, marked with attribute warn_unused_result, does not use its return value

Wvariadic-macros

C ObjC C++ ObjC++ Warning

Do not warn about using variadic macros when -pedantic

Wvla

C ObjC C++ ObjC++ Var(warn_vla) Init(-1) Warning

Warn if a variable length array is used

Wvolatile-register-var

C ObjC C++ ObjC++ Var(warn_volatile_register_var) Warning

Warn when a register variable is declared volatile

Wwrite-strings

C ObjC C++ ObjC++ Var(warn_write_strings) Warning

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.

Wpointer-sign

C ObjC Var(warn_pointer_sign) Init(-1) Warning

Warn when a pointer differs in signedness in an assignment

Wzero-as-null-pointer-constant

C++ ObjC++ Var(warn_zero_as_null_pointer_constant) Warning

Warn when a literal '0' is used as null pointer

ansi

C ObjC C++ ObjC++

A synonym for -std=c89 (for C) or -std=c++98 (for C++)

d

C ObjC C++ ObjC++ Joined

; Documented in common.opt.  FIXME - what about -dI, -dD, -dN and -dD?

faccess-control

C++ ObjC++ Var(flag_access_control) Init(1)

Enforce class member access control semantics

fall-virtual

C++ ObjC++ Ignore Warn(switch %qs is no longer supported)

fallow-parameterless-variadic-functions

C ObjC Var(flag_allow_parameterless_variadic_functions)

Allow variadic functions without named parameter

falt-external-templates

C++ ObjC++ Ignore Warn(switch %qs is no longer supported)

No longer supported

fasm

C ObjC C++ ObjC++ Var(flag_no_asm, 0)

Recognize the \"asm\" keyword

; Define extra predefined macros for use in libgcc.

fbuilding-libgcc

C ObjC C++ ObjC++ Undocumented Var(flag_building_libgcc)

fbuiltin

C ObjC C++ ObjC++ Var(flag_no_builtin, 0)

Recognize built-in functions

fbuiltin-

C ObjC C++ ObjC++ Joined

fcheck-new

C++ ObjC++ Var(flag_check_new)

Check the return value of new

fcond-mismatch

C ObjC C++ ObjC++

Allow the arguments of the '?' operator to have different types

fconserve-space

C++ ObjC++ Var(flag_conserve_space)

Reduce the size of object files

fconstant-string-class=

ObjC ObjC++ Joined MissingArgError(no class name specified with %qs)

-fconst-string-class=   Use class  for constant strings

fconstexpr-depth=

C++ ObjC++ Joined RejectNegative UInteger Var(max_constexpr_depth) Init(512)

-fconstexpr-depth=      Specify maximum constexpr recursion depth

fdebug-cpp

C ObjC C++ ObjC++

Emit debug annotations during preprocessing

fdeduce-init-list

C++ ObjC++ Var(flag_deduce_init_list) Init(0)

-fdeduce-init-list      enable deduction of std::initializer_list for a template type parameter from a brace-enclosed initializer-list

fdefault-inline

C++ ObjC++ Ignore

Does nothing.  Preserved for backward compatibility.

fdirectives-only

C ObjC C++ ObjC++

Preprocess directives only.

fdollars-in-identifiers

C ObjC C++ ObjC++

Permit '$' as an identifier character

felide-constructors

C++ ObjC++ Var(flag_elide_constructors) Init(1)

fenforce-eh-specs

C++ ObjC++ Var(flag_enforce_eh_specs) Init(1)

Generate code to check exception specifications

fenum-int-equiv

C++ ObjC++ Ignore Warn(switch %qs is no longer supported)

fexec-charset=

C ObjC C++ ObjC++ Joined RejectNegative

-fexec-charset= Convert all strings and character constants to character set 

fextended-identifiers

C ObjC C++ ObjC++

Permit universal character names (\\u and \\U) in identifiers

finput-charset=

C ObjC C++ ObjC++ Joined RejectNegative

-finput-charset=        Specify the default character set for source files

fexternal-templates

C++ ObjC++ Ignore Warn(switch %qs is no longer supported)

ffor-scope

C++ ObjC++ Var(flag_new_for_scope) Init(1)

Scope of for-init-statement variables is local to the loop

ffreestanding

C ObjC C++ ObjC++

Do not assume that standard C libraries and \"main\" exist

fgnu-keywords

C++ ObjC++ Var(flag_no_gnu_keywords, 0)

Recognize GNU-defined keywords

fgnu-runtime

ObjC ObjC++ Report RejectNegative Var(flag_next_runtime,0) Init(NEXT_OBJC_RUNTIME)

Generate code for GNU runtime environment

fgnu89-inline

C ObjC Var(flag_gnu89_inline) Init(-1)

Use traditional GNU semantics for inline functions

fguiding-decls

C++ ObjC++ Ignore Warn(switch %qs is no longer supported)

fhandle-exceptions

C++ ObjC++ Optimization Alias(fexceptions) Warn({-fhandle-exceptions has been renamed -fexceptions (and is now on by default)})

fhonor-std

C++ ObjC++ Ignore Warn(switch %qs is no longer supported)

fhosted

C ObjC

Assume normal C execution environment

fhuge-objects

C++ ObjC++ Ignore Warn(switch %qs is no longer supported)

No longer supported

fimplement-inlines

C++ ObjC++ Var(flag_implement_inlines) Init(1)

Export functions even if they can be inlined

fimplicit-inline-templates

C++ ObjC++ Var(flag_implicit_inline_templates) Init(1)

Emit implicit instantiations of inline templates

fimplicit-templates

C++ ObjC++ Var(flag_implicit_templates) Init(1)

Emit implicit instantiations of templates

ffriend-injection

C++ ObjC++ Var(flag_friend_injection)

Inject friend functions into enclosing namespace

fkeep-inline-dllexport

C C++ ObjC ObjC++ Var(flag_keep_inline_dllexport) Init(1) Report Condition(TARGET_DLLIMPORT_DECL_ATTRIBUTES)

Don't emit dllexported inline functions unless needed

flabels-ok

C++ ObjC++ Ignore Warn(switch %qs is no longer supported)

flax-vector-conversions

C ObjC C++ ObjC++ Var(flag_lax_vector_conversions)

Allow implicit conversions between vectors with differing numbers of subparts and/or differing element types.

fms-extensions

C ObjC C++ ObjC++ Var(flag_ms_extensions)

Don't warn about uses of Microsoft extensions

fmudflap

C ObjC C++ ObjC++ RejectNegative Report Var(flag_mudflap)

Add mudflap bounds-checking instrumentation for single-threaded program

fmudflapth

C ObjC C++ ObjC++ RejectNegative Report Var(flag_mudflap,2)

Add mudflap bounds-checking instrumentation for multi-threaded program

fmudflapir

C ObjC C++ ObjC++ RejectNegative Report Var(flag_mudflap_ignore_reads)

Ignore read operations when inserting mudflap instrumentation

fname-mangling-version-

C++ ObjC++ Joined Ignore Warn(switch %qs is no longer supported)

fnew-abi

C++ ObjC++ Ignore Warn(switch %qs is no longer supported)

fnext-runtime

ObjC ObjC++ Report RejectNegative Var(flag_next_runtime)

Generate code for NeXT (Apple Mac OS X) runtime environment

fnil-receivers

ObjC ObjC++ Var(flag_nil_receivers) Init(1)

Assume that receivers of Objective-C messages may be nil

fnonansi-builtins

C++ ObjC++ Var(flag_no_nonansi_builtin, 0)

fnonnull-objects

C++ ObjC++ Ignore Warn(switch %qs is no longer supported)

fnothrow-opt

C++ ObjC++ Optimization Var(flag_nothrow_opt)

Treat a throw() exception specification as noexcept to improve code size

fobjc-abi-version=

ObjC ObjC++ Joined Report RejectNegative UInteger Var(flag_objc_abi)

Specify which ABI to use for Objective-C family code and meta-data generation.

; Generate special '- .cxx_construct' and '- .cxx_destruct' methods

; to initialize any non-POD ivars in Objective-C++ classes.

fobjc-call-cxx-cdtors

ObjC++ Var(flag_objc_call_cxx_cdtors)

Generate special Objective-C methods to initialize/destroy non-POD C++ ivars, if needed

fobjc-direct-dispatch

ObjC ObjC++ Var(flag_objc_direct_dispatch)

Allow fast jumps to the message dispatcher

; Nonzero means that we will allow new ObjC exception syntax (@throw,

; @try, etc.) in source code.

fobjc-exceptions

ObjC ObjC++ Var(flag_objc_exceptions)

Enable Objective-C exception and synchronization syntax

fobjc-gc

ObjC ObjC++ Var(flag_objc_gc)

Enable garbage collection (GC) in Objective-C/Objective-C++ programs

fobjc-nilcheck

ObjC ObjC++ Var(flag_objc_nilcheck,1)

Enable inline checks for nil receivers with the NeXT runtime and ABI version 2.