; Options for the C, ObjC, C++ and ObjC++ front ends.
-; Copyright (C) 2003 Free Software Foundation, Inc.
+; Copyright (C) 2003, 2004 Free Software Foundation, Inc.
;
; This file is part of GCC.
;
; and each field appearing on its own line. The first field is the
; command-line switch with the leading "-" removed. All options
; beginning with "f" or "W" are implicitly assumed to take a "no-"
-; form; this form should not be listed.
+; form; this form should not be listed. If you do not want this
+; negative form and you want it to be automatically rejected, add
+; RejectNegative to the second field.
; The second field is a space-separated list of which parts of the
-; compiler recognize the switch. Current valid entries are "C",
-; "ObjC", "C++" and "ObjC++". If the switch takes an argument, then
-; you should also specify "Joined" and/or "Separate" to indicate where
-; the argument can appear.
+; compiler recognize the switch, as declared by "Language" entries.
+; If the switch takes an argument, then you should also specify
+; "Joined" and/or "Separate" to indicate where the argument can
+; appear. If a Joined argument can legitimately be omitted, specify
+; "JoinedOrMissing" instead of "Joined". If the argument to a switch
+; is a non-negative integer, you can specify "UInteger" and the switch
+; decoder will convert the argument for you, or complain to the user
+; if the argument is invalid. "Var(name,set)" creates an integer
+; variable "name". The variable is declared and initialized to value
+; given by "Init(value)" (or zero if this property is not defined).
+; When the option is passed to compiler, this variable is set to "set"
+; if value passed through the flag is nonzero, !"set" if value is zero,
+; or to value if "set" is omitted. If "VarExists" is specified, the
+; declaration for the variable is not created. If "Report" is specified,
+; the flag is output with -fverbose-asm.
+
+; The third field is the help text to output with --help. This is
+; automatically line-wrapped on output. Normally the switch is output
+; automatically, with the help text on the right hand side of the
+; output. However, if the help text contains a tab character, the
+; text to the left of the tab is output instead of the switch, and the
+; text to its right forms the help. This is useful for elaborating on
+; what type of argument a switch takes, for example. If the second
+; field contains "Undocumented" then nothing is output with --help.
+; Only do this with good reason like the switch being internal between
+; the driver and the front end - it is not an excuse to leave a switch
+; undocumented.
; Comments can appear on their own line anwhere in the file, preceded
; by a semicolon. Whitespace is permitted before the semicolon.
; Please try to keep this file in ASCII collating order.
--help
-C ObjC C++ ObjC++
+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++
+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++ Var(warn_abi)
+Warn about things that will change when compiling with an ABI-compliant compiler
Wall
C ObjC C++ ObjC++
+Enable most warning messages
Wbad-function-cast
-C ObjC
+C ObjC Var(warn_bad_function_cast)
+Warn about casting functions to incompatible types
Wcast-qual
-C ObjC C++ ObjC++
+C ObjC C++ ObjC++ Var(warn_cast_qual)
+Warn about casts which discard qualifiers
Wchar-subscripts
-C ObjC C++ ObjC++
+C ObjC C++ ObjC++ Var(warn_char_subscripts)
+Warn about subscripts whose type is \"char\"
Wcomment
C ObjC C++ ObjC++
+Warn about possibly nested block comments, and C++ comments spanning more than one physical line
Wcomments
C ObjC C++ ObjC++
+Synonym for -Wcomment
Wconversion
-C ObjC C++ ObjC++
+C ObjC C++ ObjC++ Var(warn_conversion)
+Warn about possibly confusing type conversions
Wctor-dtor-privacy
-C++ ObjC++
+C++ ObjC++ Var(warn_ctor_dtor_privacy)
+Warn when all constructors and destructors are private
+
+Wdeclaration-after-statement
+C ObjC Var(warn_declaration_after_statement)
+Warn when a declaration is found after a statement
Wdeprecated
-C++ ObjC++
+C++ ObjC++ Var(warn_deprecated) Init(1)
+Warn about deprecated compiler features
Wdiv-by-zero
-C ObjC
+C ObjC Var(warn_div_by_zero) Init(1)
+Warn about compile-time integer division by zero
Weffc++
-C++ ObjC++
+C++ ObjC++ Var(warn_ecpp)
+Warn about violations of Effective C++ style rules
Wendif-labels
C ObjC C++ ObjC++
+Warn about stray tokens after #elif and #endif
Werror
C ObjC C++ ObjC++
+; Documented in common.opt
Werror-implicit-function-declaration
-C ObjC
+C ObjC RejectNegative
+Make implicit function declarations an error
Wfloat-equal
-C ObjC C++ ObjC++
+C ObjC C++ ObjC++ Var(warn_float_equal)
+Warn if testing floating point numbers for equality
Wformat
C ObjC C++ ObjC++
+Warn about printf/scanf/strftime/strfmon format string anomalies
Wformat-extra-args
-C ObjC C++ ObjC++
+C ObjC C++ ObjC++ Var(warn_format_extra_args)
+Warn if passing too many arguments to a function for its format string
Wformat-nonliteral
-C ObjC C++ ObjC++
+C ObjC C++ ObjC++ Var(warn_format_nonliteral)
+Warn about format strings that are not literals
Wformat-security
-C ObjC C++ ObjC++
+C ObjC C++ ObjC++ Var(warn_format_security)
+Warn about possible security problems with format functions
Wformat-y2k
-C ObjC C++ ObjC++
+C ObjC C++ ObjC++ Var(warn_format_y2k)
+Warn about strftime formats yielding 2-digit years
Wformat-zero-length
-C ObjC
+C ObjC Var(warn_format_zero_length)
+Warn about zero-length formats
Wformat=
C ObjC C++ ObjC++ Joined
+Winit-self
+C ObjC C++ ObjC++ Var(warn_init_self)
+Warn about variables which are initialized to themselves.
+
Wimplicit
C ObjC C++ ObjC++
Wimplicit-function-declaration
-C ObjC
+C ObjC Var(mesg_implicit_function_declaration) Init(-1)
+Warn about implicit function declarations
Wimplicit-int
-C ObjC
+C ObjC Var(warn_implicit_int)
+Warn when a declaration does not specify a type
Wimport
C ObjC C++ ObjC++
+Deprecated. This switch has no effect.
Winvalid-offsetof
-C++ ObjC++
+C++ ObjC++ Var(warn_invalid_offsetof) Init(1)
+Warn about invalid uses of the \"offsetof\" macro
Winvalid-pch
C ObjC C++ ObjC++
+Warn about PCH files that are found but not used
Wlong-long
-C ObjC C++ ObjC++
+C ObjC C++ ObjC++ Var(warn_long_long) Init(1)
+Do not warn about using \"long long\" when -pedantic
Wmain
C ObjC
+Warn about suspicious declarations of \"main\"
Wmissing-braces
-C ObjC C++ ObjC++
+C ObjC C++ ObjC++ Var(warn_missing_braces)
+Warn about possibly missing braces around initializers
Wmissing-declarations
-C ObjC
+C ObjC Var(warn_missing_declarations)
+Warn about global functions without previous declarations
+
+Wmissing-field-initializers
+C ObjC C++ ObjC++ Var(warn_missing_field_initializers) Init(-1)
+Warn about missing fields in struct initializers
Wmissing-format-attribute
+C ObjC C++ ObjC++ Var(warn_missing_format_attribute)
+Warn about functions which might be candidates for format attributes
+
+Wmissing-include-dirs
C ObjC C++ ObjC++
+Warn about user-specified include directories that do not exist
Wmissing-prototypes
-C ObjC
+C ObjC Var(warn_missing_prototypes)
+Warn about global functions without prototypes
Wmultichar
C ObjC C++ ObjC++
+Warn about use of multi-character character constants
Wnested-externs
-C ObjC
+C ObjC Var(warn_nested_externs)
+Warn about \"extern\" declarations not at file scope
Wnon-template-friend
-C++ ObjC++
+C++ ObjC++ Var(warn_nontemplate_friend) Init(1)
+Warn when non-templatized friend functions are declared within a template
Wnon-virtual-dtor
-C++ ObjC++
+C++ ObjC++ Var(warn_nonvdtor)
+Warn about non-virtual destructors
Wnonnull
-C ObjC
+C ObjC Var(warn_nonnull)
+Warn about NULL being passed to argument slots marked as requiring non-NULL
Wold-style-cast
-C++ ObjC++
+C++ ObjC++ Var(warn_old_style_cast)
+Warn if a C-style cast is used in a program
+
+Wold-style-definition
+C ObjC Var(warn_old_style_definition)
+Warn if an old-style parameter definition is used
Woverloaded-virtual
-C++ ObjC++
+C++ ObjC++ Var(warn_overloaded_virtual)
+Warn about overloaded virtual function names
Wparentheses
-C ObjC C++ ObjC++
+C ObjC C++ ObjC++ Var(warn_parentheses)
+Warn about possibly missing parentheses
Wpmf-conversions
-C++ ObjC++
+C++ ObjC++ Var(warn_pmf2ptr) Init(1)
+Warn when converting the type of pointers to member functions
Wpointer-arith
-C ObjC C++ ObjC++
+C ObjC C++ ObjC++ Var(warn_pointer_arith)
+Warn about function pointer arithmetic
Wprotocol
-ObjC ObjC++
+ObjC ObjC++ Var(warn_protocol) Init(1)
+Warn if inherited methods are unimplemented
Wredundant-decls
-C ObjC C++ ObjC++
+C ObjC C++ ObjC++ Var(warn_redundant_decls)
+Warn about multiple declarations of the same object
Wreorder
-C++ ObjC++
+C++ ObjC++ Var(warn_reorder)
+Warn when the compiler reorders code
Wreturn-type
C ObjC C++ ObjC++
+Warn whenever a function's return type defaults to \"int\" (C), or about inconsistent return types (C++)
Wselector
-ObjC ObjC++
+ObjC ObjC++ Var(warn_selector)
+Warn if a selector has multiple methods
Wsequence-point
-C ObjC
+C ObjC C++ ObjC++ Var(warn_sequence_point)
+Warn about possible violations of sequence point rules
Wsign-compare
-C ObjC C++ ObjC++
+C ObjC C++ ObjC++ Var(warn_sign_compare) Init(-1)
+Warn about signed-unsigned comparisons
Wsign-promo
-C++ ObjC++
+C++ ObjC++ Var(warn_sign_promo)
+Warn when overload promotes from unsigned to signed
Wstrict-prototypes
-C ObjC
+C ObjC Var(warn_strict_prototypes)
+Warn about unprototyped function declarations
Wsynth
-C++ ObjC++
+C++ ObjC++ Var(warn_synth)
+Warn when synthesis behavior differs from Cfront
Wsystem-headers
C ObjC C++ ObjC++
+Do not suppress warnings from system headers
Wtraditional
-C ObjC
+C ObjC Var(warn_traditional)
+Warn about features not present in traditional C
Wtrigraphs
C ObjC C++ ObjC++
+Warn if trigraphs are encountered that might affect the meaning of the program
Wundeclared-selector
-ObjC ObjC++
+ObjC ObjC++ Var(warn_undeclared_selector)
+Warn about @selector()s without previously declared methods
Wundef
C ObjC C++ ObjC++
+Warn if an undefined macro is used in an #if directive
Wunknown-pragmas
C ObjC C++ ObjC++
+Warn about unrecognized pragmas
Wunused-macros
C ObjC C++ ObjC++
+Warn about macros defined in the main file that are not used
+
+Wvariadic-macros
+C ObjC C++ ObjC++
+Do not warn about using variadic macros when -pedantic
Wwrite-strings
C ObjC C++ ObjC++
+Give strings the type \"array of char\"
ansi
C ObjC C++ ObjC++
+A synonym for -std=c89. In a future version of GCC it will become synonymous with -std=c99 instead
d
C ObjC C++ ObjC++ Joined
-
-fabi-version=
-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
fconst-strings
C++ ObjC++
+Make string literals \"const char[]\" not \"char[]\"
fconstant-string-class=
ObjC ObjC++ Joined
+-fconst-string-class=<name> Use class <name> for constant strings
fdefault-inline
C++ ObjC++
+Inline member functions by default
fdollars-in-identifiers
C ObjC C++ ObjC++
-
-fdump-
-C ObjC C++ ObjC++ Joined
+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>
+
+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
+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
fguiding-decls
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
flabels-ok
C++ ObjC++
fms-extensions
C ObjC C++ ObjC++
+Don't warn about uses of Microsoft extensions
fname-mangling-version-
C++ ObjC++ Joined
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++
+fobjc-exceptions
+ObjC ObjC++
+Enable Objective-C exception and synchronization syntax
+
+fobjc-sjlj-exceptions
+ObjC ObjC++
+Enable Objective-C setjmp exception handling runtime
+
foperator-names
C++ ObjC++
+Recognize C++ kewords 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
+
+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++
+Generate run time type descriptor information
fshort-double
C ObjC C++ ObjC++
+Use the same size for double as for float
fshort-enums
C ObjC C++ ObjC++
+Use the narrowest integer type possible for enumeration types
fshort-wchar
C ObjC C++ ObjC++
+Force the underlying type for \"wchar_t\" to be \"unsigned short\"
fshow-column
C ObjC C++ ObjC++
fsigned-bitfields
C ObjC C++ ObjC++
+When \"signed\" or \"unsigned\" is not given make the bitfield signed
fsigned-char
C ObjC C++ ObjC++
+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
+C ObjC C++ ObjC++ Joined RejectNegative UInteger
+-ftabstop=<number> Distance between tab stops for column reporting
ftemplate-depth-
-C++ ObjC++ Joined
+C++ ObjC++ Joined RejectNegative UInteger
+-ftemplate-depth-<number> Specify maximum template instantiation depth
fthis-is-variable
C++ ObjC++
+fthreadsafe-statics
+C++ ObjC++
+-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++
+Make \"char\" unsigned by default
fuse-cxa-atexit
C++ ObjC++
+Use __cxa_atexit to register destructors
+
+fvisibility-inlines-hidden
+C++
+Marks all inlined methods as having hidden visibility
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
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>
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
+C Undocumented
lang-objc
-C ObjC C++ 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 C++ ObjC++
+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
remap
C ObjC C++ ObjC++
+Remap file names when including files
std=c++98
C++ ObjC++
+Conform to the ISO 1998 C++ standard
std=c89
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=gnu89
C ObjC
+Conform to the ISO 1990 C standard with GNU extensions
std=gnu99
C ObjC
+Conform to the ISO 1999 C standard with GNU extensions
std=gnu9x
C ObjC
+Deprecated in favor of -std=gnu99
std=iso9899:1990
C ObjC
+Deprecated in favor of -std=c89
std=iso9899:199409
C ObjC
+Conform to the ISO 1990 C standard as amended in 1994
std=iso9899:1999
C ObjC
+Deprecated in favor of -std=c99
std=iso9899:199x
C ObjC
+Deprecated in favor of -std=c99
traditional-cpp
C ObjC C++ ObjC++
+Enable traditional preprocessing
trigraphs
C ObjC C++ ObjC++
+-trigraphs Support ISO C trigraphs
undef
C ObjC C++ ObjC++
+Do not predefine system-specific and GCC-specific macros
v
C ObjC C++ ObjC++
+Enable verbose output
w
C ObjC C++ ObjC++
+; Documented in common.opt
+
+; This comment is to ensure we retain the blank line above.
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