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c.opt
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; Options for the C, ObjC, C++ and ObjC++ front ends.
; Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010
; 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
; <http://www.gnu.org/licenses/>.
; 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++
-output-pch=
C ObjC C++ ObjC++ Joined Separate
A
C ObjC C++ ObjC++ Joined Separate
-A<question>=<answer> Assert the <answer> to <question>. Putting '-' before <question> disables the <answer> to <question>
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
-D<macro>[=<val>] Define a <macro> with <val> as its value. If just <macro> is given, <val> is taken to be 1
E
C ObjC C++ ObjC++ Undocumented
F
C ObjC C++ ObjC++ Joined Separate
-F <dir> Add <dir> 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
-I <dir> Add <dir> to the end of the main include path
M
C ObjC C++ ObjC++
Generate make dependencies
MD
C ObjC C++ ObjC++ Separate
Generate make dependencies and compile
MF
C ObjC C++ ObjC++ Joined Separate
-MF <file> 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++ Separate
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
-MQ <target> Add a MAKE-quoted target
MT
C ObjC C++ ObjC++ Joined Separate
-MT <target> Add an unquoted target
P
C ObjC C++ ObjC++
Do not generate #line directives
U
C ObjC C++ ObjC++ Joined Separate
-U<macro> Undefine <macro>
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
Warn about C++ constructs whose meaning differs between ISO C++ 1998 and ISO C++ 200x
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
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
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
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 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 C++ ObjC++ Warning
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) Warning
Warn when a declaration does not specify a type
Wimport
C ObjC C++ ObjC++ Undocumented
Wint-to-pointer-cast
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
Wmultichar
C ObjC C++ ObjC++ Warning
Warn about use of multi-character character constants
Wnested-externs
C ObjC Var(warn_nested_externs) Warning
Warn about \"extern\" declarations not at file scope
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 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=<id|nfc|nfkc> 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
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
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-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
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++
Enforce class member access control semantics
fall-virtual
C++ ObjC++
falt-external-templates
C++ ObjC++
Change when template instances are emitted
fasm
C ObjC C++ ObjC++
Recognize the \"asm\" keyword
fbuiltin
C ObjC C++ ObjC++
Recognize built-in functions
fbuiltin-
C ObjC C++ ObjC++ Joined
fcheck-new
C++ ObjC++
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++
Reduce the size of object files
fconstant-string-class=
ObjC ObjC++ Joined
-fconst-string-class=<name> Use class <name> for constant strings
fdeduce-init-list
C++ ObjC++ Var(flag_deduce_init_list) Init(1)
-fno-deduce-init-list disable deduction of std::initializer_list for a template type parameter from a brace-enclosed initializer-list
fdefault-inline
C++ ObjC++
Inline member functions by default
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++
fenforce-eh-specs
C++ ObjC++
Generate code to check exception specifications
fenum-int-equiv
C++ ObjC++
fexec-charset=
C ObjC C++ ObjC++ Joined RejectNegative
-fexec-charset=<cset> Convert all strings and character constants to character set <cset>
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=<cset> Specify the default character set for source files
fexternal-templates
C++ ObjC++
ffor-scope
C++ ObjC++
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++
Recognize GNU-defined keywords
fgnu-runtime
ObjC ObjC++
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++
fhandle-exceptions
C++ ObjC++ Optimization
fhonor-std
C++ ObjC++
fhosted
C ObjC
Assume normal C execution environment
fhuge-objects
C++ ObjC++
Enable support for huge objects
fimplement-inlines
C++ ObjC++
Export functions even if they can be inlined
fimplicit-inline-templates
C++ ObjC++
Emit implicit instantiations of inline templates
fimplicit-templates
C++ ObjC++
Emit implicit instantiations of templates
ffriend-injection
C++ ObjC++ Var(flag_friend_injection)
Inject friend functions into enclosing namespace
flabels-ok
C++ ObjC++
flax-vector-conversions
C ObjC C++ ObjC++
Allow implicit conversions between vectors with differing numbers of subparts and/or differing element types.
fms-extensions
C ObjC C++ ObjC++
Don't warn about uses of Microsoft extensions
fname-mangling-version-
C++ ObjC++ Joined
fnew-abi
C++ ObjC++
fnext-runtime
ObjC ObjC++
Generate code for NeXT (Apple Mac OS X) runtime environment
fnil-receivers
ObjC ObjC++
Assume that receivers of Objective-C messages may be nil
fnonansi-builtins
C++ ObjC++
fnonnull-objects
C++ ObjC++
; 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
; Nonzero means that we generate NeXT setjmp based exceptions.
fobjc-sjlj-exceptions
ObjC ObjC++ Var(flag_objc_sjlj_exceptions) Init(-1)
Enable Objective-C setjmp exception handling runtime
fopenmp
C ObjC C++ ObjC++ Var(flag_openmp)
Enable OpenMP (implies -frecursive in Fortran)
foperator-names
C++ ObjC++
Recognize C++ keywords like \"compl\" and \"xor\"
foptional-diags
C++ ObjC++
Enable optional diagnostics
fpch-deps
C ObjC C++ ObjC++
fpch-preprocess
C ObjC C++ ObjC++
Look for and use PCH files even when preprocessing
fpermissive
C++ ObjC++
Downgrade conformance errors to warnings
fpreprocessed
C ObjC C++ ObjC++
Treat the input file as already preprocessed
fpretty-templates
C++ ObjC++
-fno-pretty-templates Do not pretty-print template specializations as the template signature followed by the arguments
freplace-objc-classes
ObjC ObjC++
Used in Fix-and-Continue mode to indicate that object files may be swapped in at runtime
frepo
C++ ObjC++
Enable automatic template instantiation
frtti
C++ ObjC++ Optimization
Generate run time type descriptor information
fshort-double
C ObjC C++ ObjC++ Optimization
Use the same size for double as for float
fshort-enums
C ObjC C++ ObjC++ Optimization
Use the narrowest integer type possible for enumeration types
fshort-wchar
C ObjC C++ ObjC++ Optimization
Force the underlying type for \"wchar_t\" to be \"unsigned short\"
fsigned-bitfields
C ObjC C++ ObjC++
When \"signed\" or \"unsigned\" is not given make the bitfield signed
fsigned-char
C ObjC C++ ObjC++ LTO
Make \"char\" signed by default
fsquangle
C++ ObjC++
fstats
C++ ObjC++
Display statistics accumulated during compilation
fstrict-prototype
C++ ObjC++
ftabstop=
C ObjC C++ ObjC++ Joined RejectNegative UInteger
-ftabstop=<number> Distance between tab stops for column reporting
ftemplate-depth-
C++ ObjC++ Joined RejectNegative UInteger Undocumented
ftemplate-depth=
C++ ObjC++ Joined RejectNegative UInteger
-ftemplate-depth=<number> Specify maximum template instantiation depth
fthis-is-variable
C++ ObjC++
fthreadsafe-statics
C++ ObjC++ Optimization
-fno-threadsafe-statics Do not generate thread-safe code for initializing local statics
funsigned-bitfields
C ObjC C++ ObjC++
When \"signed\" or \"unsigned\" is not given make the bitfield unsigned
funsigned-char
C ObjC C++ ObjC++ LTO
Make \"char\" unsigned by default
fuse-cxa-atexit
C++ ObjC++
Use __cxa_atexit to register destructors
fuse-cxa-get-exception-ptr
C++ ObjC++
Use __cxa_get_exception_ptr in exception handling
fvisibility-inlines-hidden
C++ ObjC++
Marks all inlined methods as having hidden visibility
fvisibility-ms-compat
C++ ObjC++ Var(flag_visibility_ms_compat)
Changes visibility to match Microsoft Visual Studio by default
fvtable-gc
C++ ObjC++
Discard unused virtual functions
fvtable-thunks
C++ ObjC++
Implement vtables using thunks
fweak
C++ ObjC++
Emit common-like symbols as weak symbols
fwide-exec-charset=
C ObjC C++ ObjC++ Joined RejectNegative
-fwide-exec-charset=<cset> Convert all wide strings and character constants to character set <cset>
fworking-directory
C ObjC C++ ObjC++
Generate a #line directive pointing at the current working directory
fxref
C++ ObjC++
Emit cross referencing information
fzero-link
ObjC ObjC++
Generate lazy class lookup (via objc_getClass()) for use in Zero-Link mode
gen-decls
ObjC ObjC++
Dump declarations to a .decl file
femit-struct-debug-baseonly
C ObjC C++ ObjC++
-femit-struct-debug-baseonly Aggressive reduced debug info for structs
femit-struct-debug-reduced
C ObjC C++ ObjC++
-femit-struct-debug-reduced Conservative reduced debug info for structs
femit-struct-debug-detailed=
C ObjC C++ ObjC++ Joined
-femit-struct-debug-detailed=<spec-list> Detailed reduced debug info for structs
idirafter
C ObjC C++ ObjC++ Joined Separate
-idirafter <dir> Add <dir> to the end of the system include path
imacros
C ObjC C++ ObjC++ Joined Separate
-imacros <file> Accept definition of macros in <file>
imultilib
C ObjC C++ ObjC++ Joined Separate
-imultilib <dir> Set <dir> to be the multilib include subdirectory
include
C ObjC C++ ObjC++ Joined Separate
-include <file> Include the contents of <file> before other files
iprefix
C ObjC C++ ObjC++ Joined Separate
-iprefix <path> Specify <path> as a prefix for next two options
isysroot
C ObjC C++ ObjC++ Joined Separate
-isysroot <dir> Set <dir> to be the system root directory
isystem
C ObjC C++ ObjC++ Joined Separate
-isystem <dir> Add <dir> to the start of the system include path
iquote
C ObjC C++ ObjC++ Joined Separate
-iquote <dir> Add <dir> to the end of the quote include path
iwithprefix
C ObjC C++ ObjC++ Joined Separate
-iwithprefix <dir> Add <dir> to the end of the system include path
iwithprefixbefore
C ObjC C++ ObjC++ Joined Separate
-iwithprefixbefore <dir> Add <dir> to the end of the main include path
lang-asm
C Undocumented
lang-objc
C ObjC C++ ObjC++ Undocumented
nostdinc
C ObjC C++ ObjC++
Do not search standard system include directories (those specified with -isystem will still be used)
nostdinc++
C++ ObjC++
Do not search standard system include directories for C++
o
C ObjC C++ ObjC++ Joined Separate
; Documented in common.opt
pedantic
C ObjC C++ ObjC++
; Documented in common.opt
pedantic-errors
C ObjC C++ ObjC++
; Documented in common.opt
print-objc-runtime-info
ObjC ObjC++
Generate C header of platform-specific features
print-pch-checksum
C ObjC C++ ObjC++
Print a checksum of the executable for PCH validity checking, and stop
remap
C ObjC C++ ObjC++
Remap file names when including files
std=c++98
C++ ObjC++
Conform to the ISO 1998 C++ standard
std=c++0x
C++ ObjC++
Conform to the ISO 1998 C++ standard, with extensions that are likely to
become a part of the upcoming ISO C++ standard, dubbed C++0x. Note that the
extensions enabled by this mode are experimental and may be removed in
future releases of GCC.
std=c89
C ObjC
Conform to the ISO 1990 C standard
std=c90
C ObjC
Conform to the ISO 1990 C standard
std=c99
C ObjC
Conform to the ISO 1999 C standard
std=c9x
C ObjC
Deprecated in favor of -std=c99
std=gnu++98
C++ ObjC++
Conform to the ISO 1998 C++ standard with GNU extensions
std=gnu++0x
C++ ObjC++
Conform to the ISO 1998 C++ standard, with GNU extensions and
extensions that are likely to become a part of the upcoming ISO C++
standard, dubbed C++0x. Note that the extensions enabled by this mode
are experimental and may be removed in future releases of GCC.
std=gnu89
C ObjC
Conform to the ISO 1990 C standard with GNU extensions
std=gnu90
C ObjC
Conform to the ISO 1990 C standard with GNU extensions
std=gnu99
C ObjC