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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

; .

; 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=     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

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

E

C ObjC C++ ObjC++ Undocumented

F

C ObjC C++ ObjC++ Joined Separate

-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

-I      Add  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     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     Add a MAKE-quoted target

MT

C ObjC C++ ObjC++ Joined Separate

-MT     Add an unquoted target

P

C ObjC C++ ObjC++

Do not generate #line directives

U

C ObjC C++ ObjC++ Joined Separate

-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

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=   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=   Use class  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= 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++

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=      Distance between tab stops for column reporting

ftemplate-depth-

C++ ObjC++ Joined RejectNegative UInteger Undocumented

ftemplate-depth=

C++ ObjC++ Joined RejectNegative UInteger

-ftemplate-depth=       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=    Convert all wide strings and character constants to character set 

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=   Detailed reduced debug info for structs

idirafter

C ObjC C++ ObjC++ Joined Separate

-idirafter      Add  to the end of the system include path

imacros

C ObjC C++ ObjC++ Joined Separate

-imacros        Accept definition of macros in 

imultilib

C ObjC C++ ObjC++ Joined Separate

-imultilib      Set  to be the multilib include subdirectory

include

C ObjC C++ ObjC++ Joined Separate

-include        Include the contents of  before other files

iprefix

C ObjC C++ ObjC++ Joined Separate

-iprefix        Specify  as a prefix for next two options

isysroot

C ObjC C++ ObjC++ Joined Separate

-isysroot       Set  to be the system root directory

isystem

C ObjC C++ ObjC++ Joined Separate

-isystem        Add  to the start of the system include path

iquote

C ObjC C++ ObjC++ Joined Separate

-iquote         Add  to the end of the quote include path

iwithprefix

C ObjC C++ ObjC++ Joined Separate

-iwithprefix    Add  to the end of the system include path

iwithprefixbefore

C ObjC C++ ObjC++ Joined Separate

-iwithprefixbefore      Add  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++