; 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.
+; Copyright (C) 2003-2014 Free Software Foundation, Inc.
;
; This file is part of GCC.
;
C ObjC C++ ObjC++ LTO Var(warn_abi) Warning
Warn about things that will change when compiling with an ABI-compliant compiler
+Wabi-tag
+C++ ObjC++ Var(warn_abi_tag) Warning
+Warn if a subobject has an abi_tag attribute that the complete object type does not have
+
Wpsabi
C ObjC C++ ObjC++ LTO Var(warn_psabi) Init(1) Undocumented
C ObjC C++ ObjC++ Warning
Enable most warning messages
+Warray-bounds
+LangEnabledBy(C ObjC C++ ObjC++,Wall)
+; in common.opt
+
Wassign-intercept
ObjC ObjC++ Var(warn_assign_intercept) Warning
Warn whenever an Objective-C assignment is being intercepted by the garbage collector
C ObjC C++ ObjC++ Warning Alias(Wcomment)
Synonym for -Wcomment
+Wconditionally-supported
+C++ ObjC++ Var(warn_conditionally_supported) Warning
+Warn for conditionally-supported constructs
+
Wconversion
C ObjC C++ ObjC++ Var(warn_conversion) Warning
Warn for implicit type conversions that may change a value
C ObjC Var(warn_declaration_after_statement) Warning
Warn when a declaration is found after a statement
+Wdelete-incomplete
+C++ ObjC++ Var(warn_delete_incomplete) Init(1) Warning
+Warn when deleting a pointer to incomplete type
+
Wdelete-non-virtual-dtor
C++ ObjC++ Var(warn_delnonvdtor) Warning LangEnabledBy(C++ ObjC++,Wall)
Warn about deleting polymorphic objects with non-virtual destructors
+Wdelete-non-virtual-dtor
+LangEnabledBy(C++ ObjC++,Weffc++)
+;
+
Wdeprecated
C C++ ObjC ObjC++ Var(warn_deprecated) Init(1) Warning
Warn if a deprecated compiler feature, class, method, or field is used
Warn about stray tokens after #elif and #endif
Wenum-compare
-C ObjC C++ ObjC++ Var(warn_enum_compare) Init(-1) Warning
+C ObjC C++ ObjC++ Var(warn_enum_compare) Init(-1) Warning LangEnabledBy(C ObjC,Wall)
Warn about comparison of different enum types
+Wenum-compare
+LangEnabledBy(C ObjC,Wc++-compat)
+;
+
Werror
C ObjC C++ ObjC++
; Documented in common.opt
C ObjC RejectNegative Warning Alias(Werror=, implicit-function-declaration)
This switch is deprecated; use -Werror=implicit-function-declaration instead
+Wfloat-conversion
+C ObjC C++ ObjC++ Var(warn_float_conversion) LangEnabledBy(C ObjC C++ ObjC++,Wconversion)
+Warn for implicit type conversions that cause loss of floating point precision
+
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
+C ObjC C++ ObjC++ Warning Alias(Wformat=, 1, 0)
Warn about printf/scanf/strftime/strfmon format string anomalies
+Wformat-contains-nul
+C ObjC C++ ObjC++ Var(warn_format_contains_nul) Warning LangEnabledBy(C ObjC C++ ObjC++,Wformat=, warn_format >= 1, 0)
+Warn about format strings that contain NUL bytes
+
Wformat-extra-args
-C ObjC C++ ObjC++ Var(warn_format_extra_args) Warning
+C ObjC C++ ObjC++ Var(warn_format_extra_args) Warning LangEnabledBy(C ObjC C++ ObjC++,Wformat=, warn_format >= 1, 0)
Warn if passing too many arguments to a function for its format string
Wformat-nonliteral
-C ObjC C++ ObjC++ Var(warn_format_nonliteral) Warning
+C ObjC C++ ObjC++ Var(warn_format_nonliteral) Warning LangEnabledBy(C ObjC C++ ObjC++,Wformat=, warn_format >= 2, 0)
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
+C ObjC C++ ObjC++ Var(warn_format_security) Warning LangEnabledBy(C ObjC C++ ObjC++,Wformat=, warn_format >= 2, 0)
Warn about possible security problems with format functions
Wformat-y2k
-C ObjC C++ ObjC++ Var(warn_format_y2k) Warning
+C ObjC C++ ObjC++ Var(warn_format_y2k) Warning LangEnabledBy(C ObjC C++ ObjC++,Wformat=,warn_format >= 2, 0)
Warn about strftime formats yielding 2-digit years
Wformat-zero-length
-C ObjC C++ ObjC++ Var(warn_format_zero_length) Warning
+C ObjC C++ ObjC++ Var(warn_format_zero_length) Warning LangEnabledBy(C ObjC C++ ObjC++,Wformat=,warn_format >= 1, 0)
Warn about zero-length formats
Wformat=
-C ObjC C++ ObjC++ Joined Warning
+C ObjC C++ ObjC++ Joined RejectNegative UInteger Var(warn_format) Warning LangEnabledBy(C ObjC C++ ObjC++,Wall, 1, 0)
+Warn about printf/scanf/strftime/strfmon format string anomalies
Wignored-qualifiers
C C++ Var(warn_ignored_qualifiers) Warning EnabledBy(Wextra)
Do not warn about using \"long long\" when -pedantic
Wmain
-C ObjC C++ ObjC++ Var(warn_main) Init(-1) Warning
+C ObjC C++ ObjC++ Var(warn_main) Init(-1) Warning LangEnabledBy(C ObjC,Wall, 2, 0)
Warn about suspicious declarations of \"main\"
+Wmain
+LangEnabledBy(C ObjC C++ ObjC++,Wpedantic, 2, 0)
+;
+
Wmissing-braces
C ObjC C++ ObjC++ Var(warn_missing_braces) Warning LangEnabledBy(C ObjC,Wall)
Warn about possibly missing braces around initializers
C ObjC C++ ObjC++ Var(warn_suggest_attribute_format) Warning
Warn about functions which might be candidates for format attributes
+Wswitch
+C ObjC C++ ObjC++ Var(warn_switch) Warning LangEnabledBy(C ObjC C++ ObjC++,Wall)
+Warn about enumerated switches, with no default, missing a case
+
+Wswitch-default
+C ObjC C++ ObjC++ Var(warn_switch_default) Warning
+Warn about enumerated switches missing a \"default:\" statement
+
+Wswitch-enum
+C ObjC C++ ObjC++ Var(warn_switch_enum) Warning
+Warn about all enumerated switches missing a specific case
+
Wmissing-format-attribute
C ObjC C++ ObjC++ Alias(Wsuggest-attribute=format)
;
Warn about global functions without prototypes
Wmudflap
-C ObjC C++ ObjC++ Var(warn_mudflap) Init(1) Warning
-Warn about constructs not instrumented by -fmudflap
+C ObjC C++ ObjC++ Ignore Warn(switch %qs is no longer supported)
Wmultichar
C ObjC C++ ObjC++ Warning
Warn about non-virtual destructors
Wnonnull
-C ObjC C++ ObjC++ Var(warn_nonnull) Warning
+C ObjC C++ ObjC++ Var(warn_nonnull) Warning LangEnabledBy(C ObjC C++ ObjC++,Wformat=,warn_format >= 1,0)
Warn about NULL being passed to argument slots marked as requiring non-NULL
+Wnonnull
+C ObjC C++ ObjC++ LangEnabledBy(C ObjC C++ ObjC++,Wall)
+;
+
Wnormalized=
C ObjC C++ ObjC++ Joined Warning
-Wnormalized=<id|nfc|nfkc> Warn about non-normalised Unicode strings
C ObjC Var(warn_old_style_definition) Warning
Warn if an old-style parameter definition is used
+Wopenmp-simd
+C C++ Var(warn_openmp_simd) Warning LangEnabledBy(C C++,Wall)
+Warn if a simd directive is overridden by the vectorizer cost model
+
Woverlength-strings
-C ObjC C++ ObjC++ Var(warn_overlength_strings) Init(-1) Warning
+C ObjC C++ ObjC++ Var(warn_overlength_strings) Warning LangEnabledBy(C ObjC C++ ObjC++,Wpedantic)
Warn if a string is longer than the maximum portable length specified by the standard
Woverloaded-virtual
Warn when converting the type of pointers to member functions
Wpointer-arith
-C ObjC C++ ObjC++ Var(warn_pointer_arith) Warning
+C ObjC C++ ObjC++ Var(warn_pointer_arith) Warning LangEnabledBy(C ObjC C++ ObjC++,Wpedantic)
Warn about function pointer arithmetic
Wpointer-sign
C ObjC C++ ObjC++ Var(warn_pragmas) Init(1) Warning
Warn about misuses of pragmas
+Wdate-time
+Common Var(cpp_warn_date_time) Warning
+Warn about __TIME__, __DATE__ and __TIMESTAMP__ usage
+
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
C++ ObjC++ Var(warn_reorder) Warning LangEnabledBy(C++ ObjC++,Wall)
Warn when the compiler reorders code
+Wreturn-local-addr
+C ObjC C++ ObjC++ Var(warn_return_local_addr) Init(1) Warning
+Warn about returning a pointer/reference to a local or temporary variable.
+
Wreturn-type
C ObjC C++ ObjC++ Var(warn_return_type) Warning LangEnabledBy(C ObjC C++ ObjC++,Wall)
Warn whenever a function's return type defaults to \"int\" (C), or about inconsistent return types (C++)
;
Wunknown-pragmas
-C ObjC C++ ObjC++ Warning
+C ObjC C++ ObjC++ Warning Var(warn_unknown_pragmas) LangEnabledBy(C ObjC C++ ObjC++,Wall, 1, 0)
Warn about unrecognized pragmas
Wunsuffixed-float-constants
Warn when typedefs locally defined in a function are not used
Wunused-macros
-C ObjC C++ ObjC++ Warning
+C ObjC C++ ObjC++ Var(cpp_warn_unused_macros) Warning
Warn about macros defined in the main file that are not used
Wunused-result
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
+C ObjC C++ ObjC++ Var(cpp_warn_variadic_macros) Init(1) Warning
+Warn about using variadic macros
Wvarargs
C ObjC C++ ObjC++ Warning Var(warn_varargs) Init(1)
fbuiltin-
C ObjC C++ ObjC++ Joined
-fcheck-new
-C++ ObjC++ Var(flag_check_new)
-Check the return value of new
+fcanonical-system-headers
+C ObjC C++ ObjC++
+Where shorter, use canonicalized paths to systems headers.
+
+fcilkplus
+C ObjC C++ ObjC++ LTO Report Var(flag_cilkplus) Init(0)
+Enable Cilk Plus
fcond-mismatch
C ObjC C++ ObjC++
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
+fdeclone-ctor-dtor
+C++ ObjC++ Var(flag_declone_ctor_dtor) Init(-1)
+Factor complex constructors and destructors to favor space over speed
+
fdefault-inline
C++ ObjC++ Ignore
Does nothing. Preserved for backward compatibility.
C ObjC C++ ObjC++ Joined RejectNegative
-finput-charset=<cset> Specify the default character set for source files
+fextern-tls-init
+C++ ObjC++ Var(flag_extern_tls_init) Init(-1)
+Support dynamic initialization of thread-local variables in a different translation unit
fexternal-templates
C++ ObjC++ Ignore Warn(switch %qs is no longer supported)
Recognize GNU-defined keywords
fgnu-runtime
-ObjC ObjC++ Report RejectNegative Var(flag_next_runtime,0) Init(NEXT_OBJC_RUNTIME)
+ObjC ObjC++ LTO Report RejectNegative Var(flag_next_runtime,0) Init(NEXT_OBJC_RUNTIME)
Generate code for GNU runtime environment
fgnu89-inline
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
+C ObjC C++ ObjC++ Ignore Warn(switch %qs is no longer supported)
fmudflapth
-C ObjC C++ ObjC++ RejectNegative Report Var(flag_mudflap,2)
-Add mudflap bounds-checking instrumentation for multi-threaded program
+C ObjC C++ ObjC++ Ignore Warn(switch %qs is no longer supported)
fmudflapir
-C ObjC C++ ObjC++ RejectNegative Report Var(flag_mudflap_ignore_reads)
-Ignore read operations when inserting mudflap instrumentation
+C ObjC C++ ObjC++ Ignore Warn(switch %qs is no longer supported)
fname-mangling-version-
C++ ObjC++ Joined Ignore Warn(switch %qs is no longer supported)
C++ ObjC++ Ignore Warn(switch %qs is no longer supported)
fnext-runtime
-ObjC ObjC++ Report RejectNegative Var(flag_next_runtime)
+ObjC ObjC++ LTO Report RejectNegative Var(flag_next_runtime)
Generate code for NeXT (Apple Mac OS X) runtime environment
fnil-receivers
Treat a throw() exception specification as noexcept to improve code size
fobjc-abi-version=
-ObjC ObjC++ Joined Report RejectNegative UInteger Var(flag_objc_abi)
+ObjC ObjC++ LTO 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
Enable Objective-C exception and synchronization syntax
fobjc-gc
-ObjC ObjC++ Var(flag_objc_gc)
+ObjC ObjC++ LTO Var(flag_objc_gc)
Enable garbage collection (GC) in Objective-C/Objective-C++ programs
fobjc-nilcheck
C ObjC C++ ObjC++ Var(flag_openmp)
Enable OpenMP (implies -frecursive in Fortran)
+fopenmp-simd
+C ObjC C++ ObjC++ Var(flag_openmp_simd)
+Enable OpenMP's SIMD directives
+
foperator-names
C++ ObjC++
Recognize C++ keywords like \"compl\" and \"xor\"
-fno-pretty-templates Do not pretty-print template specializations as the template signature followed by the arguments
freplace-objc-classes
-ObjC ObjC++ Var(flag_replace_objc_classes)
+ObjC ObjC++ LTO Var(flag_replace_objc_classes)
Used in Fix-and-Continue mode to indicate that object files may be swapped in at runtime
frepo
C ObjC C++ ObjC++ Joined
-femit-struct-debug-detailed=<spec-list> Detailed reduced debug info for structs
+fext-numeric-literals
+C++ ObjC++
+Interpret imaginary, fixed-point, or other gnu number suffix as the corresponding
+number literal rather than a user-defined number literal.
+
idirafter
C ObjC C++ ObjC++ Joined Separate MissingArgError(missing path after %qs)
-idirafter <dir> Add <dir> to the end of the system include path
std=c++11
C++ ObjC++
-Conform to the ISO 2011 C++ standard (experimental and incomplete support)
+Conform to the ISO 2011 C++ standard
std=c++0x
-C++ ObjC++ Alias(std=c++11)
+C++ ObjC++ Alias(std=c++11) Undocumented
Deprecated in favor of -std=c++11
std=c++1y
C++ ObjC++
-Conform to the ISO 201y(7?) C++ draft standard (experimental and incomplete support)
+Conform to the ISO 2014(?) C++ draft standard (experimental and incomplete support)
+
+std=c++14
+C++ ObjC++ Alias(std=c++1y) Undocumented
std=c11
C ObjC
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