| ; Options for the C, ObjC, C++ and ObjC++ front ends. |
| ; Copyright (C) 2003-2021 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++ |
| |
| -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) |
| |
| -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<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 MissingArgError(macro name missing after %qs) |
| -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 Var(flag_preprocess_only) |
| |
| F |
| Driver C ObjC C++ ObjC++ Joined Separate MissingArgError(missing path after %qs) |
| -F <dir> Add <dir> to the end of the main framework include path. |
| |
| fgimple |
| C Var(flag_gimple) Init(0) |
| Enable parsing GIMPLE. |
| |
| 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 <dir> Add <dir> 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 <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++ NoDriverArg Separate MissingArgError(missing filename after %qs) |
| Like -MD but ignore system header files. |
| |
| Mmodules |
| C++ |
| Generate C++ Module dependency information. |
| |
| Mno-modules |
| C++ |
| ; undocumented |
| |
| 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 <target> Add a target that may require quoting. |
| |
| MT |
| C ObjC C++ ObjC++ Joined Separate MissingArgError(missing makefile target after %qs) |
| -MT <target> Add a target that does not require quoting. |
| |
| P |
| C ObjC C++ ObjC++ |
| Do not generate #line directives. |
| |
| U |
| C ObjC C++ ObjC++ Joined Separate MissingArgError(macro name missing after %qs) |
| -U<macro> Undefine <macro>. |
| |
| WNSObject-attribute |
| C ObjC C++ ObjC++ LTO Var(warn_nsobject_attribute) Warning Init(1) |
| Warn if the NSObject attribute is applied to a non-typedef. |
| |
| Wabi |
| C ObjC C++ ObjC++ LTO Var(warn_abi) Warning |
| Warn about things that will change when compiling with an ABI-compliant compiler. |
| |
| Wabi= |
| C ObjC C++ ObjC++ LTO Joined RejectNegative UInteger Warning |
| Warn about things that change between the current -fabi-version and the specified version. |
| |
| 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) Warning Undocumented LangEnabledBy(C ObjC C++ ObjC++,Wabi) |
| |
| Wabsolute-value |
| C ObjC Var(warn_absolute_value) Warning EnabledBy(Wextra) |
| Warn on suspicious calls of standard functions computing absolute values. |
| |
| Waddress |
| C ObjC C++ ObjC++ Var(warn_address) Warning LangEnabledBy(C ObjC C++ ObjC++,Wall) |
| Warn about suspicious uses of memory addresses. |
| |
| Enum |
| Name(warn_aligned_new_level) Type(int) UnknownError(argument %qs to %<-Waligned-new%> not recognized) |
| |
| EnumValue |
| Enum(warn_aligned_new_level) String(none) Value(0) |
| |
| EnumValue |
| Enum(warn_aligned_new_level) String(global) Value(1) |
| |
| EnumValue |
| Enum(warn_aligned_new_level) String(all) Value(2) |
| |
| Waligned-new |
| C++ ObjC++ Alias(Waligned-new=,global,none) |
| Warn about 'new' of type with extended alignment without -faligned-new. |
| |
| Waligned-new= |
| C++ ObjC++ Var(warn_aligned_new) Enum(warn_aligned_new_level) Joined RejectNegative Warning LangEnabledBy(C++ ObjC++,Wall,1,0) |
| -Waligned-new=[none|global|all] Warn even if 'new' uses a class member allocation function. |
| |
| Wall |
| C ObjC C++ ObjC++ Warning |
| Enable most warning messages. |
| |
| Walloca |
| C ObjC C++ ObjC++ Var(warn_alloca) Warning |
| Warn on any use of alloca. |
| |
| Walloc-size-larger-than= |
| C ObjC C++ LTO ObjC++ Var(warn_alloc_size_limit) Joined Host_Wide_Int ByteSize Warning Init(HOST_WIDE_INT_MAX) |
| -Walloc-size-larger-than=<bytes> Warn for calls to allocation functions that |
| attempt to allocate objects larger than the specified number of bytes. |
| |
| Wno-alloc-size-larger-than |
| C ObjC C++ LTO ObjC++ Alias(Walloc-size-larger-than=,18446744073709551615EiB,none) Warning |
| Disable Walloc-size-larger-than= warning. Equivalent to Walloc-size-larger-than=<SIZE_MAX> or larger. |
| |
| Walloc-zero |
| C ObjC C++ ObjC++ Var(warn_alloc_zero) Warning |
| Warn for calls to allocation functions that specify zero bytes. |
| |
| Walloca-larger-than= |
| C ObjC C++ LTO ObjC++ Var(warn_alloca_limit) Warning Joined Host_Wide_Int ByteSize Init(HOST_WIDE_INT_MAX) |
| -Walloca-larger-than=<number> Warn on unbounded uses of |
| alloca, and on bounded uses of alloca whose bound can be larger than |
| <number> bytes. |
| |
| Wno-alloca-larger-than |
| C ObjC C++ LTO ObjC++ Alias(Walloca-larger-than=,18446744073709551615EiB,none) Warning |
| Disable Walloca-larger-than= warning. Equivalent to Walloca-larger-than=<SIZE_MAX> or larger. |
| |
| Warray-bounds |
| LangEnabledBy(C ObjC C++ LTO ObjC++) |
| ; in common.opt |
| |
| Warray-bounds= |
| LangEnabledBy(C ObjC C++ LTO ObjC++,Wall,1,0) |
| ; in common.opt |
| |
| Warray-compare |
| C ObjC C++ ObjC++ Var(warn_array_compare) Warning LangEnabledBy(C ObjC C++ ObjC++, Wall) |
| Warn about comparisons between two operands of array type. |
| |
| Warray-parameter |
| C ObjC C++ ObjC++ Warning Alias(Warray-parameter=, 2, 0) |
| Warn about mismatched declarations of array parameters and unsafe accesses to them. |
| |
| Warray-parameter= |
| C ObjC C++ ObjC++ Joined RejectNegative UInteger Var(warn_array_parameter) IntegerRange(0, 2) LangEnabledBy(C ObjC C++ ObjC++,Wall, 2, 0) Warning |
| Warn about mismatched declarations of array parameters and unsafe accesses to them. |
| |
| Wzero-length-bounds |
| C ObjC C++ ObjC++ Var(warn_zero_length_bounds) Warning LangEnabledBy(C ObjC C++ ObjC++,Wall) |
| Warn about accesses to interior zero-length array members. |
| |
| 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. |
| |
| Wbool-compare |
| C ObjC C++ ObjC++ Var(warn_bool_compare) Warning LangEnabledBy(C ObjC C++ ObjC++,Wall) |
| Warn about boolean expression compared with an integer value different from true/false. |
| |
| Wbool-operation |
| C ObjC C++ ObjC++ Var(warn_bool_op) Warning LangEnabledBy(C ObjC C++ ObjC++,Wall) |
| Warn about certain operations on boolean expressions. |
| |
| Wframe-address |
| C ObjC C++ ObjC++ Var(warn_frame_address) Warning LangEnabledBy(C ObjC C++ ObjC++,Wall) |
| Warn when __builtin_frame_address or __builtin_return_address is used unsafely. |
| |
| Wbuiltin-declaration-mismatch |
| C ObjC C++ ObjC++ Var(warn_builtin_declaration_mismatch) Init(1) Warning |
| Warn when a built-in function is declared with the wrong signature. |
| |
| Wbuiltin-macro-redefined |
| C ObjC C++ ObjC++ CPP(warn_builtin_macro_redefined) CppReason(CPP_W_BUILTIN_MACRO_REDEFINED) Var(cpp_warn_builtin_macro_redefined) Init(1) Warning |
| Warn when a built-in preprocessor macro is undefined or redefined. |
| |
| Wc11-c2x-compat |
| C ObjC CPP(cpp_warn_c11_c2x_compat) CppReason(CPP_W_C11_C2X_COMPAT) Var(warn_c11_c2x_compat) Init(-1) Warning |
| Warn about features not present in ISO C11, but present in ISO C2X. |
| |
| Wc90-c99-compat |
| C ObjC CPP(cpp_warn_c90_c99_compat) CppReason(CPP_W_C90_C99_COMPAT) Var(warn_c90_c99_compat) Init(-1) Warning |
| Warn about features not present in ISO C90, but present in ISO C99. |
| |
| Wc99-c11-compat |
| C ObjC Var(warn_c99_c11_compat) Init(-1) Warning |
| Warn about features not present in ISO C99, but present in ISO C11. |
| |
| Wc++-compat |
| C ObjC Var(warn_cxx_compat) CPP(warn_cxx_operator_names) CppReason(CPP_W_CXX_OPERATOR_NAMES) Init(0) Warning |
| Warn about C constructs that are not in the common subset of C and C++. |
| |
| Wc++0x-compat |
| C++ ObjC++ Warning Alias(Wc++11-compat) Undocumented |
| |
| Wc++11-compat |
| C++ ObjC++ Var(warn_cxx11_compat) Warning LangEnabledBy(C++ ObjC++,Wall) Init(0) CPP(cpp_warn_cxx11_compat) CppReason(CPP_W_CXX11_COMPAT) |
| Warn about C++ constructs whose meaning differs between ISO C++ 1998 and ISO C++ 2011. |
| |
| Wc++14-compat |
| C++ ObjC++ Var(warn_cxx14_compat) Warning LangEnabledBy(C++ ObjC++,Wall) |
| Warn about C++ constructs whose meaning differs between ISO C++ 2011 and ISO C++ 2014. |
| |
| Wc++1z-compat |
| C++ ObjC++ Warning Alias(Wc++17-compat) Undocumented |
| |
| Wc++17-compat |
| C++ ObjC++ Var(warn_cxx17_compat) Warning LangEnabledBy(C++ ObjC++,Wall) |
| Warn about C++ constructs whose meaning differs between ISO C++ 2014 and ISO C++ 2017. |
| |
| Wc++2a-compat |
| C++ ObjC++ Warning Alias(Wc++20-compat) Undocumented |
| |
| Wc++20-compat |
| C++ ObjC++ Var(warn_cxx20_compat) Warning LangEnabledBy(C++ ObjC++,Wall) |
| Warn about C++ constructs whose meaning differs between ISO C++ 2017 and ISO C++ 2020. |
| |
| Wc++11-extensions |
| C++ ObjC++ Var(warn_cxx11_extensions) Warning LangEnabledBy(C++ ObjC++) Init(1) |
| Warn about C++11 constructs in code compiled with an older standard. |
| |
| Wc++14-extensions |
| C++ ObjC++ Var(warn_cxx14_extensions) Warning LangEnabledBy(C++ ObjC++) Init(1) |
| Warn about C++14 constructs in code compiled with an older standard. |
| |
| Wc++17-extensions |
| C++ ObjC++ Var(warn_cxx17_extensions) Warning LangEnabledBy(C++ ObjC++) Init(1) |
| Warn about C++17 constructs in code compiled with an older standard. |
| |
| Wc++20-extensions |
| C++ ObjC++ Var(warn_cxx20_extensions) Warning LangEnabledBy(C++ ObjC++) Init(1) |
| Warn about C++20 constructs in code compiled with an older standard. |
| |
| Wc++23-extensions |
| C++ ObjC++ Var(warn_cxx23_extensions) Warning LangEnabledBy(C++ ObjC++) Init(1) |
| Warn about C++23 constructs in code compiled with an older standard. |
| |
| Wcast-function-type |
| C ObjC C++ ObjC++ Var(warn_cast_function_type) Warning EnabledBy(Wextra) |
| Warn about casts between incompatible function types. |
| |
| Wcast-qual |
| C ObjC C++ ObjC++ Var(warn_cast_qual) Warning |
| Warn about casts which discard qualifiers. |
| |
| Wcatch-value |
| C++ ObjC++ Warning Alias(Wcatch-value=, 1, 0) |
| Warn about catch handlers of non-reference type. |
| |
| Wcatch-value= |
| C++ ObjC++ Var(warn_catch_value) Warning Joined RejectNegative UInteger LangEnabledBy(C++ ObjC++,Wall, 1, 0) IntegerRange(0, 3) |
| Warn about catch handlers of non-reference type. |
| |
| Wchar-subscripts |
| C ObjC C++ ObjC++ Var(warn_char_subscripts) Warning LangEnabledBy(C ObjC C++ ObjC++,Wall) |
| Warn about subscripts whose type is \"char\". |
| |
| Wchkp |
| C ObjC C++ ObjC++ Warning WarnRemoved |
| Removed in GCC 9. This switch has no effect. |
| |
| Wclobbered |
| C ObjC C++ ObjC++ Var(warn_clobbered) Warning EnabledBy(Wextra) |
| Warn about variables that might be changed by \"longjmp\" or \"vfork\". |
| |
| Wcomma-subscript |
| C++ ObjC++ Var(warn_comma_subscript) Warning |
| Warn about uses of a comma operator within a subscripting expression. |
| |
| Wcomment |
| C ObjC C++ ObjC++ CPP(warn_comments) CppReason(CPP_W_COMMENTS) Var(cpp_warn_comment) Init(0) Warning LangEnabledBy(C ObjC C++ ObjC++,Wall) |
| 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. |
| |
| 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. |
| |
| Wconversion-null |
| C++ ObjC++ Var(warn_conversion_null) Init(1) Warning |
| Warn for converting NULL from/to a non-pointer type. |
| |
| Wcpp |
| C ObjC C++ ObjC++ CppReason(CPP_W_WARNING_DIRECTIVE) |
| ; Documented in common.opt |
| |
| Wctad-maybe-unsupported |
| C++ ObjC++ Var(warn_ctad_maybe_unsupported) Warning |
| Warn when performing class template argument deduction on a type with no |
| deduction guides. |
| |
| Wctor-dtor-privacy |
| C++ ObjC++ Var(warn_ctor_dtor_privacy) Warning |
| Warn when all constructors and destructors are private. |
| |
| Wdangling-else |
| C ObjC C++ ObjC++ Var(warn_dangling_else) Warning LangEnabledBy(C ObjC C++ ObjC++,Wparentheses) |
| Warn about dangling else. |
| |
| Wdate-time |
| C ObjC C++ ObjC++ CPP(warn_date_time) CppReason(CPP_W_DATE_TIME) Var(cpp_warn_date_time) Init(0) Warning |
| Warn about __TIME__, __DATE__ and __TIMESTAMP__ usage. |
| |
| Wdeclaration-after-statement |
| C ObjC Var(warn_declaration_after_statement) Init(-1) 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 || Weffc++) |
| Warn about deleting polymorphic objects with non-virtual destructors. |
| |
| Wdeprecated |
| C C++ ObjC ObjC++ CPP(cpp_warn_deprecated) CppReason(CPP_W_DEPRECATED) |
| ; Documented in common.opt |
| |
| Wdeprecated-copy |
| C++ ObjC++ Var(warn_deprecated_copy) Warning LangEnabledBy(C++ ObjC++, Wextra) |
| Mark implicitly-declared copy operations as deprecated if the class has a |
| user-provided copy operation. |
| |
| Wdeprecated-copy-dtor |
| C++ ObjC++ Var(warn_deprecated_copy, 2) Warning |
| Mark implicitly-declared copy operations as deprecated if the class has a |
| user-provided copy operation or destructor. |
| |
| Wdeprecated-enum-enum-conversion |
| C++ ObjC++ Var(warn_deprecated_enum_enum_conv) Warning |
| Warn about deprecated arithmetic conversions on operands of enumeration types. |
| |
| Wdeprecated-enum-float-conversion |
| C++ ObjC++ Var(warn_deprecated_enum_float_conv) Warning |
| Warn about deprecated arithmetic conversions on operands where one is of enumeration |
| type and the other is of a floating-point type. |
| |
| Wdesignated-init |
| C ObjC Var(warn_designated_init) Init(1) Warning |
| Warn about positional initialization of structs requiring designated initializers. |
| |
| Wdiscarded-array-qualifiers |
| C ObjC Var(warn_discarded_array_qualifiers) Init(1) Warning |
| Warn if qualifiers on arrays which are pointer targets are discarded. |
| |
| Wdiscarded-qualifiers |
| C ObjC Var(warn_discarded_qualifiers) Init(1) Warning |
| Warn if type qualifiers on pointers are discarded. |
| |
| Wdiv-by-zero |
| C ObjC C++ ObjC++ Var(warn_div_by_zero) Init(1) Warning |
| Warn about compile-time integer division by zero. |
| |
| Wduplicated-branches |
| C ObjC C++ ObjC++ Var(warn_duplicated_branches) Init(0) Warning |
| Warn about duplicated branches in if-else statements. |
| |
| Wduplicated-cond |
| C ObjC C++ ObjC++ Var(warn_duplicated_cond) Init(0) Warning |
| Warn about duplicated conditions in an if-else-if chain. |
| |
| 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) Warning EnabledBy(Wextra) |
| Warn about an empty body in an if or else statement. |
| |
| Wendif-labels |
| C ObjC C++ ObjC++ CPP(warn_endif_labels) CppReason(CPP_W_ENDIF_LABELS) Var(cpp_warn_endif_labels) Init(1) Warning LangEnabledBy(C ObjC C++ ObjC++,Wpedantic) |
| Warn about stray tokens after #else and #endif. |
| |
| Wenum-compare |
| C ObjC C++ ObjC++ Var(warn_enum_compare) Init(-1) Warning LangEnabledBy(C ObjC,Wall || Wc++-compat) |
| Warn about comparison of different enum types. |
| |
| Wenum-conversion |
| C ObjC C++ ObjC++ Var(warn_enum_conversion) Init(0) Warning LangEnabledBy(C ObjC,Wextra) |
| Warn about implicit conversion of 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. |
| |
| Wexceptions |
| C++ ObjC++ Var(warn_exceptions) Init(1) Warning |
| Warn when an exception handler is shadowed by another handler. |
| |
| Wextra |
| C ObjC C++ ObjC++ Warning |
| ; in common.opt |
| |
| Wextra-semi |
| C++ ObjC++ Var(warn_extra_semi) Warning |
| Warn about semicolon after in-class function definition. |
| |
| Wfloat-conversion |
| C ObjC C++ ObjC++ Var(warn_float_conversion) Warning 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 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-diag |
| C ObjC C++ ObjC++ Var(warn_format_diag) Warning LangEnabledBy(C ObjC C++ ObjC++,Wformat=, warn_format >= 1, 0) |
| Warn about GCC format strings with strings unsuitable for diagnostics. |
| |
| Wformat-extra-args |
| 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 LangEnabledBy(C ObjC C++ ObjC++,Wformat=, warn_format >= 2, 0) |
| Warn about format strings that are not literals. |
| |
| Wformat-overflow |
| C ObjC C++ LTO ObjC++ Warning Alias(Wformat-overflow=, 1, 0) IntegerRange(0, 2) |
| Warn about function calls with format strings that write past the end |
| of the destination region. Same as -Wformat-overflow=1. |
| |
| Wformat-security |
| 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-signedness |
| C ObjC C++ ObjC++ Var(warn_format_signedness) Warning |
| Warn about sign differences with format functions. |
| |
| Wformat-truncation |
| C ObjC C++ LTO ObjC++ Warning Alias(Wformat-truncation=, 1, 0) |
| Warn about calls to snprintf and similar functions that truncate output. |
| Same as -Wformat-truncation=1. |
| |
| Wformat-y2k |
| 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 LangEnabledBy(C ObjC C++ ObjC++,Wformat=,warn_format >= 1, 0) |
| Warn about zero-length formats. |
| |
| Wformat= |
| C ObjC C++ ObjC++ Joined RejectNegative UInteger Var(warn_format) Warning LangEnabledBy(C ObjC C++ ObjC++,Wall, 1, 0) IntegerRange(0, 2) |
| Warn about printf/scanf/strftime/strfmon format string anomalies. |
| |
| Wformat-overflow= |
| C ObjC C++ LTO ObjC++ Joined RejectNegative UInteger Var(warn_format_overflow) Warning LangEnabledBy(C ObjC C++ LTO ObjC++,Wformat=, warn_format >= 1, 0) IntegerRange(0, 2) |
| Warn about function calls with format strings that write past the end |
| of the destination region. |
| |
| Wformat-truncation= |
| C ObjC C++ LTO ObjC++ Joined RejectNegative UInteger Var(warn_format_trunc) Warning LangEnabledBy(C ObjC C++ LTO ObjC++,Wformat=, warn_format >= 1, 0) IntegerRange(0, 2) |
| Warn about calls to snprintf and similar functions that truncate output. |
| |
| Wif-not-aligned |
| C ObjC C++ ObjC++ Var(warn_if_not_aligned) Init(1) Warning |
| Warn when the field in a struct is not aligned. |
| |
| Wignored-qualifiers |
| C C++ Var(warn_ignored_qualifiers) Warning EnabledBy(Wextra) |
| Warn whenever type qualifiers are ignored. |
| |
| Wignored-attributes |
| C C++ Var(warn_ignored_attributes) Init(1) Warning |
| Warn whenever attributes are ignored. |
| |
| Winaccessible-base |
| C++ ObjC++ Var(warn_inaccessible_base) Init(1) Warning |
| Warn when a base is inaccessible in derived due to ambiguity. |
| |
| Wincompatible-pointer-types |
| C ObjC Var(warn_incompatible_pointer_types) Init(1) Warning |
| Warn when there is a conversion between pointers that have incompatible types. |
| |
| Waddress-of-packed-member |
| C ObjC C++ ObjC++ Var(warn_address_of_packed_member) Init(1) Warning |
| Warn when the address of packed member of struct or union is taken. |
| |
| Winit-self |
| C ObjC C++ ObjC++ Var(warn_init_self) Warning LangEnabledBy(C++ ObjC++,Wall) |
| Warn about variables which are initialized to themselves. |
| |
| Winit-list-lifetime |
| C++ ObjC++ Var(warn_init_list) Warning Init(1) |
| Warn about uses of std::initializer_list that can result in dangling pointers. |
| |
| Winterference-size |
| C++ ObjC++ Var(warn_interference_size) Warning Init(1) |
| Warn about nonsensical values of --param destructive-interference-size or |
| constructive-interference-size. |
| |
| Wimplicit |
| C ObjC Var(warn_implicit) Warning LangEnabledBy(C ObjC,Wall) |
| Warn about implicit declarations. |
| |
| Wimplicit-fallthrough= |
| LangEnabledBy(C ObjC C++ ObjC++,Wextra,3,0) |
| ; in common.opt |
| |
| Wdouble-promotion |
| C ObjC C++ ObjC++ Var(warn_double_promotion) Warning |
| Warn about implicit conversions from \"float\" to \"double\". |
| |
| Wexpansion-to-defined |
| C ObjC C++ ObjC++ CPP(warn_expansion_to_defined) CppReason(CPP_W_EXPANSION_TO_DEFINED) Var(cpp_warn_expansion_to_defined) Init(0) Warning EnabledBy(Wextra || Wpedantic) |
| Warn if \"defined\" is used outside #if. |
| |
| Wimplicit-function-declaration |
| C ObjC Var(warn_implicit_function_declaration) Init(-1) Warning LangEnabledBy(C ObjC,Wimplicit) |
| Warn about implicit function declarations. |
| |
| Wimplicit-int |
| C ObjC Var(warn_implicit_int) Init(-1) Warning LangEnabledBy(C ObjC,Wimplicit) |
| Warn when a declaration does not specify a type. |
| |
| Wimport |
| C ObjC C++ ObjC++ Undocumented Ignore |
| |
| Winherited-variadic-ctor |
| C++ ObjC++ Var(warn_inh_var_ctor) Init(1) Warning |
| Warn about C++11 inheriting constructors when the base has a variadic constructor. |
| |
| Wint-conversion |
| C ObjC Var(warn_int_conversion) Init(1) Warning |
| Warn about incompatible integer to pointer and pointer to integer conversions. |
| |
| Wint-in-bool-context |
| C ObjC C++ ObjC++ Var(warn_int_in_bool_context) Warning LangEnabledBy(C ObjC C++ ObjC++,Wall) |
| Warn for suspicious integer expressions in boolean context. |
| |
| 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++ CPP(warn_invalid_pch) CppReason(CPP_W_INVALID_PCH) Var(cpp_warn_invalid_pch) Init(0) Warning |
| Warn about PCH files that are found but not used. |
| |
| Wjump-misses-init |
| C ObjC Var(warn_jump_misses_init) Warning LangEnabledby(C ObjC,Wc++-compat) |
| Warn when a jump misses a variable initialization. |
| |
| Wliteral-suffix |
| C++ ObjC++ CPP(warn_literal_suffix) CppReason(CPP_W_LITERAL_SUFFIX) Var(cpp_warn_literal_suffix) Init(1) Warning |
| Warn when a string or character literal is followed by a ud-suffix which does not begin with an underscore. |
| |
| 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. |
| |
| Wlogical-not-parentheses |
| C ObjC C++ ObjC++ Var(warn_logical_not_paren) Warning LangEnabledBy(C ObjC C++ ObjC++,Wall) |
| Warn when logical not is used on the left hand side operand of a comparison. |
| |
| Wlong-long |
| C ObjC C++ ObjC++ CPP(cpp_warn_long_long) CppReason(CPP_W_LONG_LONG) Var(warn_long_long) Init(-1) Warning LangEnabledBy(C ObjC,Wc90-c99-compat) |
| Do not warn about using \"long long\" when -pedantic. |
| |
| Wmain |
| 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) |
| ; |
| |
| Wmemset-transposed-args |
| C ObjC C++ ObjC++ Var(warn_memset_transposed_args) Warning LangEnabledBy(C ObjC C++ ObjC++,Wall) |
| Warn about suspicious calls to memset where the third argument is constant literal zero and the second is not. |
| |
| Wmemset-elt-size |
| C ObjC C++ ObjC++ Var(warn_memset_elt_size) Warning LangEnabledBy(C ObjC C++ ObjC++,Wall) |
| Warn about suspicious calls to memset where the third argument contains the number of elements not multiplied by the element size. |
| |
| Wmisleading-indentation |
| C C++ Common Var(warn_misleading_indentation) Warning LangEnabledBy(C C++,Wall) |
| Warn when the indentation of the code does not reflect the block structure. |
| |
| Wmismatched-dealloc |
| C ObjC C++ ObjC++ Var(warn_mismatched_alloc) Warning LangEnabledBy(C ObjC C++ ObjC++,Wall) |
| Warn for deallocation calls with arguments returned from mismatched allocation |
| functions. |
| |
| Wmismatched-new-delete |
| C++ ObjC++ Var(warn_mismatched_new_delete) Warning LangEnabledBy(C ObjC C++ ObjC++,Wall) |
| Warn for mismatches between calls to operator new or delete and the corresponding |
| call to the allocation or deallocation function. |
| |
| Wmismatched-tags |
| C++ ObjC++ Var(warn_mismatched_tags) Warning |
| Warn when a class is redeclared or referenced using a mismatched class-key. |
| |
| Wmissing-braces |
| C ObjC C++ ObjC++ Var(warn_missing_braces) Warning LangEnabledBy(C ObjC,Wall) |
| 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) Warning EnabledBy(Wextra) |
| Warn about missing fields in struct initializers. |
| |
| Wmissing-requires |
| C++ ObjC++ Var(warn_missing_requires) Init(1) Warning |
| Warn about likely missing requires keyword. |
| |
| Wmultistatement-macros |
| C ObjC C++ ObjC++ Var(warn_multistatement_macros) Warning LangEnabledBy(C ObjC C++ ObjC++,Wall) |
| Warn about unsafe macros expanding to multiple statements used as a body of a clause such as if, else, while, switch, or for. |
| |
| Wmultiple-inheritance |
| C++ ObjC++ Var(warn_multiple_inheritance) Warning |
| Warn on direct multiple inheritance. |
| |
| Wnamespaces |
| C++ ObjC++ Var(warn_namespaces) Warning |
| Warn on namespace definition. |
| |
| Wpacked-not-aligned |
| C ObjC C++ ObjC++ Var(warn_packed_not_aligned) Warning LangEnabledBy(C ObjC C++ ObjC++,Wall) |
| Warn when fields in a struct with the packed attribute are misaligned. |
| |
| Wrange-loop-construct |
| C++ ObjC++ Var(warn_range_loop_construct) Warning LangEnabledBy(C++ ObjC++,Wall) |
| Warn when a range-based for-loop is creating unnecessary copies. |
| |
| Wredundant-tags |
| C++ ObjC++ Var(warn_redundant_tags) Warning |
| Warn when a class or enumerated type is referenced using a redundant class-key. |
| |
| Wsized-deallocation |
| C++ ObjC++ Var(warn_sized_deallocation) Warning EnabledBy(Wextra) |
| Warn about missing sized deallocation functions. |
| |
| Wsizeof-pointer-div |
| C ObjC C++ ObjC++ Var(warn_sizeof_pointer_div) Warning LangEnabledBy(C ObjC C++ ObjC++,Wall) |
| Warn about suspicious divisions of two sizeof expressions that don't work correctly with pointers. |
| |
| Wsizeof-array-div |
| C ObjC C++ ObjC++ Var(warn_sizeof_array_div) Warning LangEnabledBy(C ObjC C++ ObjC++,Wall) |
| Warn about divisions of two sizeof operators when the first one is applied |
| to an array and the divisor does not equal the size of the array element. |
| |
| Wsizeof-pointer-memaccess |
| C ObjC C++ ObjC++ Var(warn_sizeof_pointer_memaccess) Warning LangEnabledBy(C ObjC C++ ObjC++,Wall) |
| Warn about suspicious length parameters to certain string functions if the argument uses sizeof. |
| |
| Wsizeof-array-argument |
| C ObjC C++ ObjC++ Var(warn_sizeof_array_argument) Warning Init(1) |
| Warn when sizeof is applied on a parameter declared as an array. |
| |
| Wstring-compare |
| C ObjC C++ LTO ObjC++ Warning Var(warn_string_compare) Warning LangEnabledBy(C ObjC C++ ObjC++, Wextra) |
| Warn about calls to strcmp and strncmp used in equality expressions that |
| are necessarily true or false due to the length of one and size of the other |
| argument. |
| |
| Wstringop-overflow |
| C ObjC C++ LTO ObjC++ Warning Alias(Wstringop-overflow=, 2, 0) |
| Warn about buffer overflow in string manipulation functions like memcpy |
| and strcpy. |
| |
| Wstringop-overflow= |
| C ObjC C++ LTO ObjC++ Joined RejectNegative UInteger Var(warn_stringop_overflow) Init(2) Warning LangEnabledBy(C ObjC C++ LTO ObjC++, Wall, 2, 0) IntegerRange(0, 4) |
| Under the control of Object Size type, warn about buffer overflow in string |
| manipulation functions like memcpy and strcpy. |
| |
| Wstringop-overread |
| C ObjC C++ LTO ObjC++ Var(warn_stringop_overread) Init(1) Warning LangEnabledBy(C ObjC C++ LTO ObjC++, Wall) |
| Warn about reading past the end of a source array in string manipulation functions like memchr and memcpy. |
| |
| Wstringop-truncation |
| C ObjC C++ LTO ObjC++ Var(warn_stringop_truncation) Warning Init (1) LangEnabledBy(C ObjC C++ LTO ObjC++, Wall) |
| Warn about truncation in string manipulation functions like strncat and strncpy. |
| |
| Wsuggest-attribute=format |
| C ObjC C++ ObjC++ Var(warn_suggest_attribute_format) Warning |
| Warn about functions which might be candidates for format attributes. |
| |
| Wsuggest-override |
| C++ ObjC++ Var(warn_override) Warning |
| Suggest that the override keyword be used when the declaration of a virtual |
| function overrides another. |
| |
| 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. |
| |
| Wswitch-bool |
| C ObjC C++ ObjC++ Var(warn_switch_bool) Warning Init(1) |
| Warn about switches with boolean controlling expression. |
| |
| Wswitch-outside-range |
| C ObjC C++ ObjC++ Var(warn_switch_outside_range) Warning Init(1) |
| Warn about switch values that are outside of the switch's type range. |
| |
| Wtemplates |
| C++ ObjC++ Var(warn_templates) Warning |
| Warn on primary template declaration. |
| |
| Wmissing-attributes |
| C ObjC C++ ObjC++ Var(warn_missing_attributes) Warning LangEnabledBy(C ObjC C++ ObjC++,Wall) |
| Warn about declarations of entities that may be missing attributes |
| that related entities have been declared with. |
| |
| Wmissing-format-attribute |
| C ObjC C++ ObjC++ Warning Alias(Wsuggest-attribute=format) |
| ; |
| |
| Wmissing-include-dirs |
| C ObjC C++ ObjC++ CPP(warn_missing_include_dirs) CppReason(CPP_W_MISSING_INCLUDE_DIRS) Var(cpp_warn_missing_include_dirs) Init(0) Warning |
| Warn about user-specified include directories that do not exist. |
| |
| Wmissing-parameter-type |
| C ObjC Var(warn_missing_parameter_type) Warning EnabledBy(Wextra) |
| 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++ WarnRemoved |
| |
| Wmultichar |
| C ObjC C++ ObjC++ CPP(warn_multichar) CppReason(CPP_W_MULTICHAR) Var(cpp_warn_multichar) Init(0) Warning |
| Warn about use of multi-character character constants. |
| |
| Wnarrowing |
| C ObjC C++ ObjC++ Warning Var(warn_narrowing) Init(-1) LangEnabledBy(C++ ObjC++,Wall || Wc++11-compat) |
| 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. |
| |
| Wnoexcept-type |
| C++ ObjC++ Warning Var(warn_noexcept_type) LangEnabledBy(C++ ObjC++,Wabi || Wc++17-compat) |
| Warn if C++17 noexcept function type will change the mangled name of a symbol. |
| |
| Wnon-template-friend |
| C++ ObjC++ Var(warn_nontemplate_friend) Init(1) Warning |
| Warn when non-templatized friend functions are declared within a template. |
| |
| Wclass-conversion |
| C++ ObjC++ Var(warn_class_conversion) Init(1) Warning |
| Warn when a conversion function will never be called due to the type it converts to. |
| |
| Wclass-memaccess |
| C++ ObjC++ Var(warn_class_memaccess) Warning LangEnabledBy(C++ ObjC++, Wall) |
| Warn for unsafe raw memory writes to objects of class types. |
| |
| Wnon-virtual-dtor |
| C++ ObjC++ Var(warn_nonvdtor) Warning LangEnabledBy(C++ ObjC++,Weffc++) |
| Warn about non-virtual destructors. |
| |
| Wnonnull |
| C ObjC C++ LTO ObjC++ Var(warn_nonnull) Warning LangEnabledBy(C ObjC C++ LTO ObjC++,Wformat=,warn_format >= 1,0) |
| Warn about NULL being passed to argument slots marked as requiring non-NULL. |
| |
| Wnonnull |
| C ObjC C++ LTO ObjC++ LangEnabledBy(C ObjC C++ LTO ObjC++,Wall) |
| ; |
| |
| Wnonnull-compare |
| C ObjC C++ ObjC++ LangEnabledBy(C ObjC C++ ObjC++,Wall) |
| ; |
| |
| Wnormalized |
| C ObjC C++ ObjC++ Warning Alias(Wnormalized=,nfc,none) |
| ; |
| |
| Wnormalized= |
| C ObjC C++ ObjC++ RejectNegative Joined Warning CPP(warn_normalize) CppReason(CPP_W_NORMALIZE) Init(normalized_C) Var(cpp_warn_normalize) Enum(cpp_normalize_level) |
| -Wnormalized=[none|id|nfc|nfkc] Warn about non-normalized Unicode strings. |
| |
| ; Required for these enum values. |
| SourceInclude |
| cpplib.h |
| |
| Enum |
| Name(cpp_normalize_level) Type(int) UnknownError(argument %qs to %<-Wnormalized%> not recognized) |
| |
| EnumValue |
| Enum(cpp_normalize_level) String(none) Value(normalized_none) |
| |
| EnumValue |
| Enum(cpp_normalize_level) String(nfkc) Value(normalized_KC) |
| |
| EnumValue |
| Enum(cpp_normalize_level) String(id) Value(normalized_identifier_C) |
| |
| EnumValue |
| Enum(cpp_normalize_level) String(nfc) Value(normalized_C) |
| |
| Wobjc-root-class |
| ObjC ObjC++ Var(warn_objc_root_class) Warning Init(1) |
| Warn if a class interface has no superclass. Root classes may use an attribute |
| to suppress this warning. |
| |
| 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) Warning EnabledBy(Wextra) |
| Warn for obsolescent usage in a declaration. |
| |
| Wold-style-definition |
| C ObjC Var(warn_old_style_definition) Init(-1) Warning |
| Warn if an old-style parameter definition is used. |
| |
| Wopenacc-parallelism |
| C C++ Var(warn_openacc_parallelism) Warning |
| Warn about potentially suboptimal choices related to OpenACC parallelism. |
| |
| 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) Warning LangEnabledBy(C ObjC C++ ObjC++,Wpedantic) |
| 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) Warning EnabledBy(Wextra) |
| Warn about overriding initializers without side effects. |
| |
| Woverride-init-side-effects |
| C ObjC Var(warn_override_init_side_effects) Init(1) Warning |
| Warn about overriding initializers with 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 LangEnabledBy(C ObjC C++ ObjC++,Wall) |
| Warn about possibly missing parentheses. |
| |
| Wpedantic |
| C ObjC C++ ObjC++ CPP(cpp_pedantic) CppReason(CPP_W_PEDANTIC) Warning |
| ; Documented in common.opt |
| |
| Wpessimizing-move |
| C++ ObjC++ Var(warn_pessimizing_move) Warning LangEnabledBy(C++ ObjC++, Wall) |
| Warn about calling std::move on a local object in a return statement preventing copy elision. |
| |
| 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 LangEnabledBy(C ObjC C++ ObjC++,Wpedantic) |
| Warn about function pointer arithmetic. |
| |
| Wpointer-sign |
| C ObjC Var(warn_pointer_sign) Warning LangEnabledBy(C ObjC,Wall || Wpedantic) |
| Warn when a pointer differs in signedness in an assignment. |
| |
| Wpointer-compare |
| C ObjC C++ ObjC++ Var(warn_pointer_compare) Init(1) Warning |
| Warn when a pointer is compared with a zero character constant. |
| |
| 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. |
| |
| Wprio-ctor-dtor |
| C ObjC C++ ObjC++ Var(warn_prio_ctor_dtor) Init(1) Warning |
| Warn if constructor or destructors with priorities from 0 to 100 are used. |
| |
| 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. |
| |
| Wplacement-new |
| C++ Warning Alias(Wplacement-new=, 1, 0) |
| Warn for placement new expressions with undefined behavior. |
| |
| Wplacement-new= |
| C++ Joined RejectNegative UInteger Var(warn_placement_new) Init(-1) Warning IntegerRange(0, 2) |
| Warn for placement new expressions with undefined behavior. |
| |
| Wredundant-decls |
| C ObjC C++ ObjC++ Var(warn_redundant_decls) Warning |
| Warn about multiple declarations of the same object. |
| |
| Wredundant-move |
| C++ ObjC++ Var(warn_redundant_move) Warning LangEnabledBy(C++ ObjC++,Wextra) |
| Warn about redundant calls to std::move. |
| |
| Wregister |
| C++ ObjC++ Var(warn_register) Warning |
| Warn about uses of register storage specifier. |
| |
| Wreorder |
| C++ ObjC++ Var(warn_reorder) Warning LangEnabledBy(C++ ObjC++,Wall) |
| Warn when the compiler reorders code. |
| |
| Wreturn-type |
| C ObjC C++ ObjC++ Var(warn_return_type) Warning LangEnabledBy(C ObjC C++ ObjC++,Wall) Init(-1) |
| Warn whenever a function's return type defaults to \"int\" (C), or about inconsistent return types (C++). |
| |
| Wscalar-storage-order |
| C ObjC C++ ObjC++ Var(warn_scalar_storage_order) Init(1) Warning |
| Warn on suspicious constructs involving reverse scalar storage order. |
| |
| 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 LangEnabledBy(C ObjC C++ ObjC++,Wall) |
| Warn about possible violations of sequence point rules. |
| |
| Wshadow-ivar |
| ObjC ObjC++ Var(warn_shadow_ivar) EnabledBy(Wshadow) Init(1) Warning |
| Warn if a local declaration hides an instance variable. |
| |
| Wshift-overflow |
| C ObjC C++ ObjC++ Warning Alias(Wshift-overflow=, 1, 0) |
| Warn if left shift of a signed value overflows. |
| |
| Wshift-overflow= |
| C ObjC C++ ObjC++ Joined RejectNegative UInteger Var(warn_shift_overflow) Init(-1) Warning IntegerRange(0, 2) |
| Warn if left shift of a signed value overflows. |
| |
| Wshift-count-negative |
| C ObjC C++ ObjC++ Var(warn_shift_count_negative) Init(1) Warning |
| Warn if shift count is negative. |
| |
| Wshift-count-overflow |
| C ObjC C++ ObjC++ Var(warn_shift_count_overflow) Init(1) Warning |
| Warn if shift count >= width of type. |
| |
| Wshift-negative-value |
| C ObjC C++ ObjC++ Var(warn_shift_negative_value) Init(-1) Warning |
| Warn if left shifting a negative value. |
| |
| Warith-conversion |
| C ObjC C++ ObjC++ Var(warn_arith_conv) Warning |
| Warn if conversion of the result of arithmetic might change the value even though converting the operands cannot. |
| |
| Wsign-compare |
| C ObjC C++ ObjC++ Var(warn_sign_compare) Warning LangEnabledBy(C++ ObjC++,Wall) |
| Warn about signed-unsigned comparisons. |
| |
| Wsign-compare |
| C ObjC C++ ObjC++ EnabledBy(Wextra) |
| ; |
| |
| Wsign-conversion |
| C ObjC C++ ObjC++ Var(warn_sign_conversion) Warning LangEnabledBy(C ObjC,Wconversion) |
| Warn for implicit type conversions between signed and unsigned integers. |
| |
| 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-aliasing= |
| C ObjC C++ ObjC++ LangEnabledBy(C ObjC C++ ObjC++,Wall, 3, 0) IntegerRange(0, 3) |
| ; |
| |
| Wstrict-overflow= |
| C ObjC C++ ObjC++ LangEnabledBy(C ObjC C++ ObjC++,Wall, 1, 0) IntegerRange(0, 5) |
| ; |
| |
| 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 |
| |
| Wtautological-compare |
| C ObjC C++ ObjC++ Var(warn_tautological_compare) Warning LangEnabledBy(C ObjC C++ ObjC++,Wall) |
| Warn if a comparison always evaluates to true or false. |
| |
| Wterminate |
| C++ ObjC++ Warning Var(warn_terminate) Init(1) |
| Warn if a throw expression will always result in a call to terminate(). |
| |
| Wtraditional |
| C ObjC CPP(cpp_warn_traditional) CppReason(CPP_W_TRADITIONAL) Var(warn_traditional) Init(0) 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++ CPP(warn_trigraphs) CppReason(CPP_W_TRIGRAPHS) Var(cpp_warn_trigraphs) Init(2) Warning LangEnabledBy(C ObjC C++ ObjC++,Wall) |
| 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++ CPP(warn_undef) CppReason(CPP_W_UNDEF) Var(cpp_warn_undef) Init(0) Warning |
| Warn if an undefined macro is used in an #if directive. |
| |
| Wuninitialized |
| C ObjC C++ ObjC++ LTO LangEnabledBy(C ObjC C++ ObjC++ LTO,Wall) |
| ; |
| |
| Wmaybe-uninitialized |
| C ObjC C++ ObjC++ LTO LangEnabledBy(C ObjC C++ ObjC++ LTO,Wall) |
| ; |
| |
| Wunknown-pragmas |
| C ObjC C++ ObjC++ Warning Var(warn_unknown_pragmas) LangEnabledBy(C ObjC C++ ObjC++,Wall, 1, 0) |
| Warn about unrecognized pragmas. |
| |
| Wunsuffixed-float-constants |
| C ObjC Var(warn_unsuffixed_float_constants) Warning |
| Warn about unsuffixed float constants. |
| |
| Wunused |
| C ObjC C++ ObjC++ LangEnabledBy(C ObjC C++ ObjC++,Wall) |
| ; documented in common.opt |
| |
| Wunused-local-typedefs |
| C ObjC C++ ObjC++ Var(warn_unused_local_typedefs) Warning EnabledBy(Wunused) |
| Warn when typedefs locally defined in a function are not used. |
| |
| Wunused-macros |
| C ObjC C++ ObjC++ CppReason(CPP_W_UNUSED_MACROS) Var(cpp_warn_unused_macros) 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. |
| |
| Wunused-variable |
| C ObjC C++ ObjC++ LangEnabledBy(C ObjC C++ ObjC++,Wunused) |
| ; documented in common.opt |
| |
| Wunused-const-variable |
| C ObjC C++ ObjC++ Warning Alias(Wunused-const-variable=, 2, 0) |
| Warn when a const variable is unused. |
| |
| Wunused-const-variable= |
| C ObjC C++ ObjC++ Joined RejectNegative UInteger Var(warn_unused_const_variable) Warning LangEnabledBy(C ObjC,Wunused-variable, 1, 0) IntegerRange(0, 2) |
| Warn when a const variable is unused. |
| |
| Wvariadic-macros |
| C ObjC C++ ObjC++ CPP(warn_variadic_macros) CppReason(CPP_W_VARIADIC_MACROS) Var(cpp_warn_variadic_macros) Init(0) Warning LangEnabledBy(C ObjC C++ ObjC++,Wpedantic || Wtraditional) |
| Warn about using variadic macros. |
| |
| Wvarargs |
| C ObjC C++ ObjC++ Warning Var(warn_varargs) Init(1) |
| Warn about questionable usage of the macros used to retrieve variable arguments. |
| |
| Wvexing-parse |
| C++ ObjC++ Warning Var(warn_vexing_parse) Init(1) |
| Warn about the most vexing parse syntactic ambiguity. |
| |
| Wvla |
| C ObjC C++ ObjC++ Var(warn_vla) Init(-1) Warning |
| Warn if a variable length array is used. |
| |
| Wvla-larger-than= |
| C ObjC C++ LTO ObjC++ Var(warn_vla_limit) Warning Joined Host_Wide_Int ByteSize Init(HOST_WIDE_INT_MAX) |
| -Wvla-larger-than=<number> Warn on unbounded uses of variable-length |
| arrays, and on bounded uses of variable-length arrays whose bound can be |
| larger than <number> bytes. |
| |
| Wno-vla-larger-than |
| C ObjC C++ LTO ObjC++ Alias(Wvla-larger-than=,18446744073709551615EiB,none) Warning |
| Disable Wvla-larger-than= warning. Equivalent to Wvla-larger-than=<SIZE_MAX> or larger. |
| |
| Wvla-parameter |
| C ObjC C++ ObjC++ Var(warn_vla_parameter) Warning LangEnabledBy(C ObjC C++ ObjC++,Wall) |
| Warn about mismatched declarations of VLA parameters. |
| |
| Wvolatile |
| C++ ObjC++ Var(warn_volatile) Warning |
| Warn about deprecated uses of volatile qualifier. |
| |
| Wvolatile-register-var |
| C ObjC C++ ObjC++ Var(warn_volatile_register_var) Warning LangEnabledBy(C ObjC C++ ObjC++,Wall) |
| Warn when a register variable is declared volatile. |
| |
| Wvirtual-inheritance |
| C++ ObjC++ Var(warn_virtual_inheritance) Warning |
| Warn on direct virtual inheritance. |
| |
| Wvirtual-move-assign |
| C++ ObjC++ Var(warn_virtual_move_assign) Warning Init(1) |
| Warn if a virtual base has a non-trivial move assignment operator. |
| |
| 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. |
| |
| 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. |
| |
| Wuseless-cast |
| C++ ObjC++ Var(warn_useless_cast) Warning |
| Warn about useless casts. |
| |
| Wsubobject-linkage |
| C++ ObjC++ Var(warn_subobject_linkage) Warning Init(1) |
| Warn if a class type has a base or a field whose type uses the anonymous namespace or depends on a type with no linkage. |
| |
| Wduplicate-decl-specifier |
| C ObjC Var(warn_duplicate_decl_specifier) Warning LangEnabledBy(C ObjC,Wall) |
| Warn when a declaration has duplicate const, volatile, restrict or _Atomic specifier. |
| |
| Wrestrict |
| C ObjC C++ ObjC++ Var(warn_restrict) Warning LangEnabledBy(C ObjC C++ ObjC++, Wall) |
| Warn when an argument passed to a restrict-qualified parameter aliases with |
| another argument. |
| |
| 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? |
| |
| fabi-compat-version= |
| C++ ObjC++ Joined RejectNegative UInteger Var(flag_abi_compat_version) Init(-1) |
| The version of the C++ ABI used for -Wabi warnings and link compatibility aliases. |
| |
| faccess-control |
| C++ ObjC++ Var(flag_access_control) Init(1) |
| Enforce class member access control semantics. |
| |
| fada-spec-parent= |
| C ObjC C++ ObjC++ RejectNegative Joined Var(ada_specs_parent) |
| -fada-spec-parent=unit Dump Ada specs as child units of given parent. |
| |
| faligned-new |
| C++ ObjC++ Alias(faligned-new=,1,0) |
| Support C++17 allocation of over-aligned types. |
| |
| faligned-new= |
| C++ ObjC++ Joined RejectNegative Var(aligned_new_threshold) UInteger Init(-1) |
| -faligned-new=<N> Use C++17 over-aligned type allocation for alignments greater than N. |
| |
| fall-virtual |
| C++ ObjC++ WarnRemoved |
| |
| fallow-parameterless-variadic-functions |
| C ObjC Var(flag_allow_parameterless_variadic_functions) |
| Allow variadic functions without named parameter. |
| |
| falt-external-templates |
| C++ ObjC++ WarnRemoved |
| 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 |
| |
| fcanonical-system-headers |
| C ObjC C++ ObjC++ |
| Where shorter, use canonicalized paths to systems headers. |
| |
| fchar8_t |
| C++ ObjC++ Var(flag_char8_t) Init(-1) |
| Enable the char8_t fundamental type and use it as the type for UTF-8 string |
| and character literals. |
| |
| fcheck-pointer-bounds |
| C ObjC C++ ObjC++ LTO WarnRemoved |
| Removed in GCC 9. This switch has no effect. |
| |
| fchkp-check-incomplete-type |
| C ObjC C++ ObjC++ LTO WarnRemoved |
| Removed in GCC 9. This switch has no effect. |
| |
| fchkp-zero-input-bounds-for-main |
| C ObjC C++ ObjC++ LTO WarnRemoved |
| Removed in GCC 9. This switch has no effect. |
| |
| fchkp-first-field-has-own-bounds |
| C ObjC C++ ObjC++ LTO WarnRemoved RejectNegative |
| Removed in GCC 9. This switch has no effect. |
| |
| fchkp-narrow-bounds |
| C ObjC C++ ObjC++ LTO WarnRemoved |
| Removed in GCC 9. This switch has no effect. |
| |
| fchkp-narrow-to-innermost-array |
| C ObjC C++ ObjC++ LTO WarnRemoved RejectNegative |
| Removed in GCC 9. This switch has no effect. |
| |
| fchkp-flexible-struct-trailing-arrays |
| C ObjC C++ ObjC++ LTO WarnRemoved |
| Removed in GCC 9. This switch has no effect. |
| |
| fchkp-optimize |
| C ObjC C++ ObjC++ LTO WarnRemoved |
| |
| fchkp-use-fast-string-functions |
| C ObjC C++ ObjC++ LTO WarnRemoved |
| Removed in GCC 9. This switch has no effect. |
| |
| fchkp-use-nochk-string-functions |
| C ObjC C++ ObjC++ LTO WarnRemoved |
| Removed in GCC 9. This switch has no effect. |
| |
| fchkp-use-static-bounds |
| C ObjC C++ ObjC++ LTO WarnRemoved |
| Removed in GCC 9. This switch has no effect. |
| |
| fchkp-use-static-const-bounds |
| C ObjC C++ ObjC++ LTO WarnRemoved |
| Removed in GCC 9. This switch has no effect. |
| |
| fchkp-treat-zero-dynamic-size-as-infinite |
| C ObjC C++ ObjC++ LTO WarnRemoved |
| Removed in GCC 9. This switch has no effect. |
| |
| fchkp-check-read |
| C ObjC C++ ObjC++ LTO WarnRemoved |
| Removed in GCC 9. This switch has no effect. |
| |
| fchkp-check-write |
| C ObjC C++ ObjC++ LTO WarnRemoved |
| Removed in GCC 9. This switch has no effect. |
| |
| fchkp-store-bounds |
| C ObjC C++ ObjC++ LTO WarnRemoved |
| Removed in GCC 9. This switch has no effect. |
| |
| fchkp-instrument-calls |
| C ObjC C++ ObjC++ LTO WarnRemoved |
| Removed in GCC 9. This switch has no effect. |
| |
| fchkp-instrument-marked-only |
| C ObjC C++ ObjC++ LTO WarnRemoved |
| Removed in GCC 9. This switch has no effect. |
| |
| fchkp-use-wrappers |
| C ObjC C++ ObjC++ LTO WarnRemoved |
| Removed in GCC 9. This switch has no effect. |
| |
| static-libmpx |
| Driver WarnRemoved |
| Removed in GCC 9. This switch has no effect. |
| |
| static-libmpxwrappers |
| Driver WarnRemoved |
| Removed in GCC 9. This switch has no effect. |
| |
| fcilkplus |
| C ObjC C++ ObjC++ LTO Undocumented Ignore |
| Removed in GCC 8. This switch has no effect. |
| |
| fconcepts |
| C++ ObjC++ Var(flag_concepts) |
| Enable support for C++ concepts. |
| |
| fconcepts-ts |
| C++ ObjC++ Var(flag_concepts_ts) Init(0) |
| Enable certain features present in the Concepts TS. |
| |
| fconcepts-diagnostics-depth= |
| C++ ObjC++ Joined RejectNegative UInteger Var(concepts_diagnostics_max_depth) Init(1) |
| Specify maximum error replay depth during recursive diagnosis of a constraint satisfaction failure. |
| |
| fcond-mismatch |
| C ObjC C++ ObjC++ |
| Allow the arguments of the '?' operator to have different types. |
| |
| fconserve-space |
| C++ ObjC++ Ignore |
| Does nothing. Preserved for backward compatibility. |
| |
| fconstant-string-class= |
| ObjC ObjC++ Joined MissingArgError(no class name specified with %qs) |
| -fconst-string-class=<name> Use class <name> for constant strings. |
| |
| fconstexpr-depth= |
| C++ ObjC++ Joined RejectNegative UInteger Var(max_constexpr_depth) Init(512) |
| -fconstexpr-depth=<number> Specify maximum constexpr recursion depth. |
| |
| fconstexpr-cache-depth= |
| C++ ObjC++ Joined RejectNegative UInteger Var(constexpr_cache_depth) Init(8) |
| -fconstexpr-cache-depth=<number> Specify maximum constexpr recursion cache depth. |
| |
| fconstexpr-loop-limit= |
| C++ ObjC++ Joined RejectNegative UInteger Var(constexpr_loop_limit) Init(262144) |
| -fconstexpr-loop-limit=<number> Specify maximum constexpr loop iteration count. |
| |
| fconstexpr-ops-limit= |
| C++ ObjC++ Joined RejectNegative Host_Wide_Int Var(constexpr_ops_limit) Init(33554432) |
| -fconstexpr-ops-limit=<number> Specify maximum number of constexpr operations during a single constexpr evaluation. |
| |
| fcoroutines |
| C++ LTO Var(flag_coroutines) |
| Enable C++ coroutines (experimental). |
| |
| fdebug-cpp |
| C ObjC C++ ObjC++ |
| Emit debug annotations during preprocessing. |
| |
| fdeduce-init-list |
| C++ ObjC++ Ignore |
| Does nothing. Preserved for backward compatibility. |
| |
| 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. |
| |
| fdiagnostics-show-template-tree |
| C++ ObjC++ Var(flag_diagnostics_show_template_tree) Init(0) |
| Print hierarchical comparisons when template types are mismatched. |
| |
| fdirectives-only |
| C ObjC C++ ObjC++ |
| Preprocess directives only. |
| |
| fdollars-in-identifiers |
| C ObjC C++ ObjC++ |
| Permit '$' as an identifier character. |
| |
| fmacro-prefix-map= |
| C ObjC C++ ObjC++ Joined RejectNegative |
| -fmacro-prefix-map=<old>=<new> Map one directory name to another in __FILE__, __BASE_FILE__, and __builtin_FILE(). |
| |
| fdump-ada-spec |
| C ObjC C++ ObjC++ RejectNegative Var(flag_dump_ada_spec) |
| Write all declarations as Ada code transitively. |
| |
| fdump-ada-spec-slim |
| C ObjC C++ ObjC++ RejectNegative Var(flag_dump_ada_spec_slim) |
| Write all declarations as Ada code for the given file only. |
| |
| felide-constructors |
| C++ ObjC++ Var(flag_elide_constructors) Init(1) |
| |
| felide-type |
| C++ ObjC++ Var(flag_elide_type) Init(1) |
| Do not elide common elements in template comparisons. |
| |
| fenforce-eh-specs |
| C++ ObjC++ Var(flag_enforce_eh_specs) Init(1) |
| Generate code to check exception specifications. |
| |
| fenum-int-equiv |
| C++ ObjC++ WarnRemoved |
| |
| 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. |
| |
| 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++ WarnRemoved |
| |
| ffor-scope |
| C++ ObjC++ WarnRemoved |
| |
| 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++ LTO 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++ WarnRemoved |
| |
| fhandle-exceptions |
| C++ ObjC++ Optimization Alias(fexceptions) Warn({%<-fhandle-exceptions%> has been renamed %<-fexceptions%> (and is now on by default)}) |
| |
| fhonor-std |
| C++ ObjC++ WarnRemoved |
| |
| fhosted |
| C ObjC |
| Assume normal C execution environment. |
| |
| fhuge-objects |
| C++ ObjC++ WarnRemoved |
| 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. |
| |
| fnew-inheriting-ctors |
| C++ ObjC++ Var(flag_new_inheriting_ctors) Init(1) |
| Implement C++17 inheriting constructor semantics. |
| |
| ffriend-injection |
| C++ ObjC++ WarnRemoved |
| |
| fkeep-inline-dllexport |
| C C++ ObjC ObjC++ Var(flag_keep_inline_dllexport) Init(1) Condition(TARGET_DLLIMPORT_DECL_ATTRIBUTES) |
| Don't emit dllexported inline functions unless needed. |
| |
| flabels-ok |
| C++ ObjC++ WarnRemoved |
| |
| 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. |
| |
| fmodules-ts |
| C++ ObjC++ Var(flag_modules) Integer Init(0) |
| Enable C++ modules-ts (experimental). |
| |
| fno-modules |
| C++ ObjC++ Undocumented RejectNegative Var(flag_modules,0) Integer |
| ;; undocumented |
| |
| fmodule-header |
| C++ ObjC RejectNegative Var(flag_header_unit,0) Integer |
| Enable C++ header module (experimental). |
| |
| fmodule-header= |
| C++ ObjC++ Joined RejectNegative Undocumented |
| |
| fmodule-implicit-inline |
| C++ ObjC++ Var(flag_module_implicit_inline,0) Integer |
| Member functions defined within their class are inline in module purview. |
| |
| fmodule-only |
| C++ ObjC RejectNegative Var(flag_module_only) Integer |
| Only emit Compiled Module Interface. |
| |
| fmodule-mapper= |
| C++ ObjC++ Joined RejectNegative MissingArgError(missing mapper) |
| Mapper for module to CMI files. |
| |
| fmodule-lazy |
| C++ ObjC++ Var(flag_module_lazy) Init(1) |
| Enable lazy module importing. |
| |
| fmodule-version-ignore |
| C++ ObjC Var(flag_module_version_ignore) Integer |
| ; undocumented, Very dangerous, but occasionally useful |
| |
| Winvalid-imported-macros |
| C++ ObjC++ Var(warn_imported_macros) Warning |
| Warn about macros that have conflicting header units definitions. |
| |
| flang-info-include-translate |
| C++ Var(note_include_translate_yes) |
| Note #include directives translated to import declarations. |
| |
| flang-info-include-translate-not |
| C++ Var(note_include_translate_no) |
| Note #include directives not translated to import declarations, and not known to be textual. |
| |
| flang-info-include-translate= |
| C++ Joined RejectNegative MissingArgError(missing header name) |
| Note a #include translation of a specific header. |
| |
| flang-info-module-cmi |
| C++ Var(note_module_cmi_yes) |
| Note Compiled Module Interface pathnames. |
| |
| flang-info-module-cmi= |
| C++ Joined RejectNegative MissingArgError(missing module name) |
| Note Compiled Module Interface pathname of a specific module or header-unit. |
| |
| fmax-include-depth= |
| C ObjC C++ ObjC++ Joined RejectNegative UInteger |
| fmax-include-depth=<number> Set the maximum depth of the nested #include. |
| |
| fms-extensions |
| C ObjC C++ ObjC++ Var(flag_ms_extensions) |
| Don't warn about uses of Microsoft extensions. |
| |
| fmudflap |
| C ObjC C++ ObjC++ WarnRemoved |
| |
| fmudflapth |
| C ObjC C++ ObjC++ WarnRemoved |
| |
| fmudflapir |
| C ObjC C++ ObjC++ WarnRemoved |
| |
| fname-mangling-version- |
| C++ ObjC++ Joined WarnRemoved |
| |
| fnew-abi |
| C++ ObjC++ WarnRemoved |
| |
| fnew-ttp-matching |
| C++ ObjC++ Var(flag_new_ttp) |
| Implement resolution of DR 150 for matching of template template arguments. |
| |
| fnext-runtime |
| ObjC ObjC++ LTO 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. |
| |
| flocal-ivars |
| ObjC ObjC++ Var(flag_local_ivars) Init(1) |
| Allow access to instance variables as if they were local declarations within instance method implementations. |
| |
| fivar-visibility= |
| ObjC ObjC++ Joined RejectNegative Enum(ivar_visibility) Var(default_ivar_visibility) Init(IVAR_VISIBILITY_PROTECTED) |
| -fvisibility=[private|protected|public|package] Set the default symbol visibility. |
| |
| Enum |
| Name(ivar_visibility) Type(enum ivar_visibility) UnknownError(unrecognized ivar visibility value %qs) |
| |
| EnumValue |
| Enum(ivar_visibility) String(private) Value(IVAR_VISIBILITY_PRIVATE) |
| |
| EnumValue |
| Enum(ivar_visibility) String(protected) Value(IVAR_VISIBILITY_PROTECTED) |
| |
| EnumValue |
| Enum(ivar_visibility) String(public) Value(IVAR_VISIBILITY_PUBLIC) |
| |
| EnumValue |
| Enum(ivar_visibility) String(package) Value(IVAR_VISIBILITY_PACKAGE) |
| |
| fnonansi-builtins |
| C++ ObjC++ Var(flag_no_nonansi_builtin, 0) |
| |
| fnonnull-objects |
| C++ ObjC++ WarnRemoved |
| |
| 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++ LTO Joined 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++ LTO 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. |
| |
| ; 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. |
| |
| fobjc-std=objc1 |
| ObjC ObjC++ Var(flag_objc1_only) |
| Conform to the Objective-C 1.0 language as implemented in GCC 4.0. |
| |
| fopenacc |
| C ObjC C++ ObjC++ LTO Var(flag_openacc) |
| Enable OpenACC. |
| |
| fopenacc-dim= |
| C ObjC C++ ObjC++ LTO Joined Var(flag_openacc_dims) |
| Specify default OpenACC compute dimensions. |
| |
| fopenmp |
| C ObjC C++ ObjC++ LTO 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\". |
| |
| foptional-diags |
| C++ ObjC++ Ignore |
| Does nothing. Preserved for backward compatibility. |
| |
| fpch-deps |
| C ObjC C++ ObjC++ |
| |
| fpch-preprocess |
| C ObjC C++ ObjC++ |
| Look for and use PCH files even when preprocessing. |
| |
| fpermissive |
| C++ ObjC++ Var(flag_permissive) |
| Downgrade conformance errors to warnings. |
| |
| fplan9-extensions |
| C ObjC Var(flag_plan9_extensions) |
| Enable Plan 9 language extensions. |
| |
| fpreprocessed |
| C ObjC C++ ObjC++ |
| Treat the input file as already preprocessed. |
| |
| ftrack-macro-expansion |
| C ObjC C++ ObjC++ JoinedOrMissing RejectNegative UInteger |
| ; converted into ftrack-macro-expansion= |
| |
| ftrack-macro-expansion= |
| C ObjC C++ ObjC++ JoinedOrMissing RejectNegative UInteger |
| -ftrack-macro-expansion=<0|1|2> Track locations of tokens coming from macro expansion and display them in error messages. |
| |
| fpretty-templates |
| C++ ObjC++ Var(flag_pretty_templates) Init(1) |
| Do not pretty-print template specializations as the template signature followed by the arguments. |
| |
| fprintf-return-value |
| C ObjC C++ ObjC++ LTO Optimization Var(flag_printf_return_value) Init(1) |
| Treat known sprintf return values as constants. |
| |
| freplace-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++ WarnRemoved |
| Removed in GCC 10. This switch has no effect. |
| |
| frtti |
| C++ ObjC++ Optimization Var(flag_rtti) Init(1) |
| Generate run time type descriptor information. |
| |
| fshort-enums |
| C ObjC C++ ObjC++ LTO Optimization Var(flag_short_enums) |
| Use the narrowest integer type possible for enumeration types. |
| |
| fshort-wchar |
| C ObjC C++ ObjC++ LTO Optimization Var(flag_short_wchar) |
| Force the underlying type for \"wchar_t\" to be \"unsigned short\". |
| |
| fsigned-bitfields |
| C ObjC C++ ObjC++ Var(flag_signed_bitfields) Init(1) |
| When \"signed\" or \"unsigned\" is not given make the bitfield signed. |
| |
| fsigned-char |
| C ObjC C++ ObjC++ LTO Var(flag_signed_char) |
| Make \"char\" signed by default. |
| |
| fsized-deallocation |
| C++ ObjC++ Var(flag_sized_deallocation) Init(-1) |
| Enable C++14 sized deallocation support. |
| |
| fsquangle |
| C++ ObjC++ WarnRemoved |
| |
| fsso-struct= |
| C ObjC Joined RejectNegative Enum(sso_struct) Var(default_sso) Init(SSO_NATIVE) |
| -fsso-struct=[big-endian|little-endian|native] Set the default scalar storage order. |
| |
| Enum |
| Name(sso_struct) Type(enum scalar_storage_order_kind) UnknownError(unrecognized scalar storage order value %qs) |
| |
| EnumValue |
| Enum(sso_struct) String(big-endian) Value(SSO_BIG_ENDIAN) |
| |
| EnumValue |
| Enum(sso_struct) String(little-endian) Value(SSO_LITTLE_ENDIAN) |
| |
| EnumValue |
| Enum(sso_struct) String(native) Value(SSO_NATIVE) |
| |
| fstats |
| C++ ObjC++ Var(flag_detailed_statistics) |
| Display statistics accumulated during compilation. |
| |
| fstrict-enums |
| C++ ObjC++ Optimization Var(flag_strict_enums) |
| Assume that values of enumeration type are always within the minimum range of that type. |
| |
| fstrict-prototype |
| C++ ObjC++ WarnRemoved |
| |
| fstrong-eval-order |
| C++ ObjC++ Common Alias(fstrong-eval-order=, all, none) |
| Follow the C++17 evaluation order requirements for assignment expressions, |
| shift, member function calls, etc. |
| |
| fstrong-eval-order= |
| C++ ObjC++ Common Var(flag_strong_eval_order) Joined Enum(strong_eval_order) RejectNegative Init(-1) |
| Follow the C++17 evaluation order requirements for assignment expressions, |
| shift, member function calls, etc. |
| |
| Enum |
| Name(strong_eval_order) Type(int) |
| |
| EnumValue |
| Enum(strong_eval_order) String(none) Value(0) |
| |
| EnumValue |
| Enum(strong_eval_order) String(some) Value(1) |
| |
| EnumValue |
| Enum(strong_eval_order) String(all) Value(2) |
| |
| ftemplate-backtrace-limit= |
| C++ ObjC++ Joined RejectNegative UInteger Var(template_backtrace_limit) Init(10) |
| Set the maximum number of template instantiation notes for a single warning or error. |
| |
| ftemplate-depth- |
| C++ ObjC++ Joined RejectNegative Undocumented Alias(ftemplate-depth=) |
| |
| ftemplate-depth= |
| C++ ObjC++ Joined RejectNegative UInteger |
| -ftemplate-depth=<number> Specify maximum template instantiation depth. |
| |
| fthis-is-variable |
| C++ ObjC++ WarnRemoved |
| |
| fthreadsafe-statics |
| C++ ObjC++ Optimization Var(flag_threadsafe_statics) Init(1) |
| -fno-threadsafe-statics Do not generate thread-safe code for initializing local statics. |
| |
| funsigned-bitfields |
| C ObjC C++ ObjC++ Var(flag_signed_bitfields, 0) |
| When \"signed\" or \"unsigned\" is not given make the bitfield unsigned. |
| |
| funsigned-char |
| C ObjC C++ ObjC++ LTO Var(flag_signed_char, 0) |
| Make \"char\" unsigned by default. |
| |
| fuse-cxa-atexit |
| C++ ObjC++ Var(flag_use_cxa_atexit) Init(DEFAULT_USE_CXA_ATEXIT) |
| Use __cxa_atexit to register destructors. |
| |
| fuse-cxa-get-exception-ptr |
| C++ ObjC++ Var(flag_use_cxa_get_exception_ptr) Init(2) |
| Use __cxa_get_exception_ptr in exception handling. |
| |
| fvisibility-inlines-hidden |
| C++ ObjC++ |
| Marks all inlined functions and 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++ WarnRemoved |
| No longer supported. |
| |
| fvtable-thunks |
| C++ ObjC++ WarnRemoved |
| No longer supported. |
| |
| fweak |
| C++ ObjC++ Var(flag_weak) Init(1) |
| 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++ Var(flag_working_directory) Init(-1) |
| Generate a #line directive pointing at the current working directory. |
| |
| fxref |
| C++ ObjC++ WarnRemoved |
| No longer supported. |
| |
| fzero-link |
| ObjC ObjC++ Var(flag_zero_link) |
| Generate lazy class lookup (via objc_getClass()) for use in Zero-Link mode. |
| |
| gen-decls |
| ObjC ObjC++ Driver Var(flag_gen_declaration) RejectNegative |
| 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. |
| |
| fext-numeric-literals |
| C++ ObjC++ Var(flag_ext_numeric_literals) Init(1) |
| 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. |
| |
| imacros |
| C ObjC C++ ObjC++ Joined Separate MissingArgError(missing filename after %qs) |
| -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 MissingArgError(missing filename after %qs) |
| -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 MissingArgError(missing path after %qs) |
| -isysroot <dir> Set <dir> to be the system root directory. |
| |
| isystem |
| C ObjC C++ ObjC++ Joined Separate MissingArgError(missing path after %qs) |
| -isystem <dir> Add <dir> to the start of the system include path. |
| |
| iquote |
| C ObjC C++ ObjC++ Joined Separate MissingArgError(missing path after %qs) |
| -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 RejectDriver |
| |
| no-integrated-cpp |
| Driver |
| |
| 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++ Alias(Wpedantic) |
| ; 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 revised by the 2003 technical corrigendum. |
| |
| std=c++03 |
| C++ ObjC++ Alias(std=c++98) |
| Conform to the ISO 1998 C++ standard revised by the 2003 technical corrigendum. |
| |
| std=c++11 |
| C++ ObjC++ |
| Conform to the ISO 2011 C++ standard. |
| |
| std=c++0x |
| C++ ObjC++ Alias(std=c++11) Undocumented |
| Deprecated in favor of -std=c++11. |
| |
| std=c++1y |
| C++ ObjC++ Alias(std=c++14) Undocumented |
| Deprecated in favor of -std=c++14. |
| |
| std=c++14 |
| C++ ObjC++ |
| Conform to the ISO 2014 C++ standard. |
| |
| std=c++1z |
| C++ ObjC++ Alias(std=c++17) Undocumented |
| Deprecated in favor of -std=c++17. |
| |
| std=c++17 |
| C++ ObjC++ |
| Conform to the ISO 2017 C++ standard. |
| |
| std=c++2a |
| C++ ObjC++ Alias(std=c++20) Undocumented |
| Conform to the ISO 2020 C++ standard (experimental and incomplete support). |
| |
| std=c++20 |
| C++ ObjC++ |
| Conform to the ISO 2020 C++ standard (experimental and incomplete support). |
| |
| std=c++2b |
| C++ ObjC++ Alias(std=c++23) |
| Conform to the ISO 2023 C++ draft standard (experimental and incomplete support). |
| |
| std=c++23 |
| C++ ObjC++ Undocumented |
| Conform to the ISO 2023 C++ draft standard (experimental and incomplete support). |
| |
| std=c11 |
| C ObjC |
| Conform to the ISO 2011 C standard. |
| |
| std=c1x |
| C ObjC Alias(std=c11) |
| Deprecated in favor of -std=c11. |
| |
| std=c17 |
| C ObjC |
| Conform to the ISO 2017 C standard (published in 2018). |
| |
| std=c18 |
| C ObjC Alias(std=c17) |
| Conform to the ISO 2017 C standard (published in 2018). |
| |
| std=c2x |
| C ObjC |
| Conform to the ISO 202X C standard draft (experimental and incomplete support). |
| |
| std=c89 |
| C ObjC Alias(std=c90) |
| 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 Alias(std=c99) |
| Deprecated in favor of -std=c99. |
| |
| std=gnu++98 |
| C++ ObjC++ |
| Conform to the ISO 1998 C++ standard revised by the 2003 technical |
| corrigendum with GNU extensions. |
| |
| std=gnu++03 |
| C++ ObjC++ Alias(std=gnu++98) |
| Conform to the ISO 1998 C++ standard revised by the 2003 technical |
| corrigendum with GNU extensions. |
| |
| std=gnu++11 |
| C++ ObjC++ |
| Conform to the ISO 2011 C++ standard with GNU extensions. |
| |
| std=gnu++0x |
| C++ ObjC++ Alias(std=gnu++11) Undocumented |
| Deprecated in favor of -std=gnu++11. |
| |
| std=gnu++1y |
| C++ ObjC++ Alias(std=gnu++14) Undocumented |
| Deprecated in favor of -std=gnu++14. |
| |
| std=gnu++14 |
| C++ ObjC++ |
| Conform to the ISO 2014 C++ standard with GNU extensions. |
| |
| std=gnu++1z |
| C++ ObjC++ Alias(std=gnu++17) Undocumented |
| Deprecated in favor of -std=gnu++17. |
| |
| std=gnu++17 |
| C++ ObjC++ |
| Conform to the ISO 2017 C++ standard with GNU extensions. |
| |
| std=gnu++2a |
| C++ ObjC++ Alias(std=gnu++20) Undocumented |
| Conform to the ISO 2020 C++ standard with GNU extensions (experimental and incomplete support). |
| |
| std=gnu++20 |
| C++ ObjC++ |
| Conform to the ISO 2020 C++ standard with GNU extensions (experimental and incomplete support). |
| |
| std=gnu++2b |
| C++ ObjC++ Alias(std=gnu++23) |
| Conform to the ISO 2023 C++ draft standard with GNU extensions (experimental and incomplete support). |
| |
| std=gnu++23 |
| C++ ObjC++ Undocumented |
| Conform to the ISO 2023 C++ draft standard with GNU extensions (experimental and incomplete support). |
| |
| std=gnu11 |
| C ObjC |
| Conform to the ISO 2011 C standard with GNU extensions. |
| |
| std=gnu1x |
| C ObjC Alias(std=gnu11) |
| Deprecated in favor of -std=gnu11. |
| |
| std=gnu17 |
| C ObjC |
| Conform to the ISO 2017 C standard (published in 2018) with GNU extensions. |
| |
| std=gnu18 |
| C ObjC Alias(std=gnu17) |
| Conform to the ISO 2017 C standard (published in 2018) with GNU extensions. |
| |
| std=gnu2x |
| C ObjC |
| Conform to the ISO 202X C standard draft with GNU extensions (experimental and incomplete support). |
| |
| std=gnu89 |
| C ObjC Alias(std=gnu90) |
| 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 |
| Conform to the ISO 1999 C standard with GNU extensions. |
| |
| std=gnu9x |
| C ObjC Alias(std=gnu99) |
| Deprecated in favor of -std=gnu99. |
| |
| std=iso9899:1990 |
| C ObjC Alias(std=c90) |
| Conform to the ISO 1990 C standard. |
| |
| std=iso9899:199409 |
| C ObjC |
| Conform to the ISO 1990 C standard as amended in 1994. |
| |
| std=iso9899:1999 |
| C ObjC Alias(std=c99) |
| Conform to the ISO 1999 C standard. |
| |
| std=iso9899:199x |
| C ObjC Alias(std=c99) |
| Deprecated in favor of -std=iso9899:1999. |
| |
| std=iso9899:2011 |
| C ObjC Alias(std=c11) |
| Conform to the ISO 2011 C standard. |
| |
| std=iso9899:2017 |
| C ObjC Alias(std=c17) |
| Conform to the ISO 2017 C standard (published in 2018). |
| |
| std=iso9899:2018 |
| C ObjC Alias(std=c17) |
| Conform to the ISO 2017 C standard (published in 2018). |
| |
| stdlib= |
| Driver C++ ObjC++ Common Condition(ENABLE_STDLIB_OPTION) Var(flag_stdlib_kind) Joined Enum(stdlib_kind) RejectNegative Init(1) |
| -stdlib=[libstdc++|libc++] The standard library to be used for C++ headers |
| and runtime. |
| |
| Enum |
| Name(stdlib_kind) Type(int) |
| |
| EnumValue |
| Enum(stdlib_kind) String(libstdc++) Value(1) |
| |
| EnumValue |
| Enum(stdlib_kind) String(libc++) Value(2) |
| |
| traditional |
| Driver |
| |
| traditional-cpp |
| C ObjC C++ ObjC++ |
| Enable traditional preprocessing. |
| |
| trigraphs |
| C ObjC C++ ObjC++ |
| -trigraphs Support ISO C trigraphs. |
| |
| undef |
| C ObjC C++ ObjC++ Var(flag_undef) |
| Do not predefine system-specific and GCC-specific macros. |
| |
| v |
| C ObjC C++ ObjC++ |
| ; Documented in common.opt |
| |
| w |
| C ObjC C++ ObjC++ |
| ; Documented in common.opt |
| |
| ; This comment is to ensure we retain the blank line above. |
