2172 lines
66 KiB
Plaintext
2172 lines
66 KiB
Plaintext
; Options for the C, ObjC, C++ and ObjC++ front ends.
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; Copyright (C) 2003-2019 Free Software Foundation, Inc.
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;
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; This file is part of GCC.
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;
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; GCC is free software; you can redistribute it and/or modify it under
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; the terms of the GNU General Public License as published by the Free
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; Software Foundation; either version 3, or (at your option) any later
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; version.
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;
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; GCC is distributed in the hope that it will be useful, but WITHOUT ANY
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; WARRANTY; without even the implied warranty of MERCHANTABILITY or
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; FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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; for more details.
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;
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; You should have received a copy of the GNU General Public License
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; along with GCC; see the file COPYING3. If not see
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; <http://www.gnu.org/licenses/>.
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; See the GCC internals manual for a description of this file's format.
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; Please try to keep this file in ASCII collating order.
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Language
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C
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Language
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ObjC
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Language
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C++
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Language
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ObjC++
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-all-warnings
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C ObjC C++ ObjC++ Warning Alias(Wall)
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-ansi
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C ObjC C++ ObjC++ Alias(ansi)
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-assert
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C ObjC C++ ObjC++ Separate Alias(A) MissingArgError(assertion missing after %qs)
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-assert=
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C ObjC C++ ObjC++ Joined Alias(A) MissingArgError(assertion missing after %qs)
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-comments
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C ObjC C++ ObjC++ Alias(C)
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-comments-in-macros
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C ObjC C++ ObjC++ Alias(CC)
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-define-macro
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C ObjC C++ ObjC++ Separate Alias(D) MissingArgError(macro name missing after %qs)
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-define-macro=
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C ObjC C++ ObjC++ Joined Alias(D) MissingArgError(macro name missing after %qs)
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-dependencies
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C ObjC C++ ObjC++ Alias(M)
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-dump
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C ObjC C++ ObjC++ Separate Alias(d)
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-dump=
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C ObjC C++ ObjC++ Joined Alias(d)
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-imacros
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C ObjC C++ ObjC++ Separate Alias(imacros) MissingArgError(missing filename after %qs)
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-imacros=
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C ObjC C++ ObjC++ Joined Alias(imacros) MissingArgError(missing filename after %qs)
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-include
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C ObjC C++ ObjC++ Separate Alias(include) MissingArgError(missing filename after %qs)
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-include=
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C ObjC C++ ObjC++ Joined Alias(include) MissingArgError(missing filename after %qs)
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-include-barrier
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C ObjC C++ ObjC++ Alias(I, -)
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-include-directory
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C ObjC C++ ObjC++ Separate Alias(I) MissingArgError(missing path after %qs)
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-include-directory=
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C ObjC C++ ObjC++ Joined Alias(I) MissingArgError(missing path after %qs)
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-include-directory-after
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C ObjC C++ ObjC++ Separate Alias(idirafter) MissingArgError(missing path after %qs)
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-include-directory-after=
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C ObjC C++ ObjC++ Joined Alias(idirafter) MissingArgError(missing path after %qs)
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-include-prefix
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C ObjC C++ ObjC++ Separate Alias(iprefix)
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-include-prefix=
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C ObjC C++ ObjC++ JoinedOrMissing Alias(iprefix)
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-include-with-prefix
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C ObjC C++ ObjC++ Separate Alias(iwithprefix)
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-include-with-prefix=
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C ObjC C++ ObjC++ JoinedOrMissing Alias(iwithprefix)
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-include-with-prefix-after
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C ObjC C++ ObjC++ Separate Alias(iwithprefix)
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-include-with-prefix-after=
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C ObjC C++ ObjC++ JoinedOrMissing Alias(iwithprefix)
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-include-with-prefix-before
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C ObjC C++ ObjC++ Separate Alias(iwithprefixbefore)
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-include-with-prefix-before=
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C ObjC C++ ObjC++ JoinedOrMissing Alias(iwithprefixbefore)
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-no-integrated-cpp
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Driver Alias(no-integrated-cpp)
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-no-line-commands
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C ObjC C++ ObjC++ Alias(P)
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-no-standard-includes
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C ObjC C++ ObjC++ Alias(nostdinc)
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-no-warnings
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C ObjC C++ ObjC++ Alias(w)
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-output
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C ObjC C++ ObjC++ Separate Alias(o)
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-output=
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C ObjC C++ ObjC++ Joined Alias(o)
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-output-pch=
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C ObjC C++ ObjC++ Joined Separate
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-pedantic
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C ObjC C++ ObjC++ Alias(pedantic)
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-preprocess
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C ObjC C++ ObjC++ Undocumented Alias(E)
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-print-missing-file-dependencies
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C ObjC C++ ObjC++ Alias(MG)
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-trace-includes
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C ObjC C++ ObjC++ Alias(H)
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-traditional
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Driver Alias(traditional)
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-traditional-cpp
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C ObjC C++ ObjC++ Alias(traditional-cpp)
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-trigraphs
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C ObjC C++ ObjC++ Alias(trigraphs)
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-undefine-macro
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C ObjC C++ ObjC++ Separate Alias(U) MissingArgError(macro name missing after %qs)
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-undefine-macro=
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C ObjC C++ ObjC++ Joined Alias(U) MissingArgError(macro name missing after %qs)
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-user-dependencies
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C ObjC C++ ObjC++ Alias(MM)
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-verbose
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Common C ObjC C++ ObjC++ Alias(v)
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-write-dependencies
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C ObjC C++ ObjC++ NoDriverArg Separate Alias(MD) MissingArgError(missing filename after %qs)
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-write-user-dependencies
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C ObjC C++ ObjC++ NoDriverArg Separate Alias(MMD) MissingArgError(missing filename after %qs)
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A
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C ObjC C++ ObjC++ Joined Separate MissingArgError(assertion missing after %qs)
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-A<question>=<answer> Assert the <answer> to <question>. Putting '-' before <question> disables the <answer> to <question>.
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C
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C ObjC C++ ObjC++
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Do not discard comments.
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CC
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C ObjC C++ ObjC++
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Do not discard comments in macro expansions.
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D
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C ObjC C++ ObjC++ Joined Separate MissingArgError(macro name missing after %qs)
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-D<macro>[=<val>] Define a <macro> with <val> as its value. If just <macro> is given, <val> is taken to be 1.
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E
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C ObjC C++ ObjC++ Undocumented Var(flag_preprocess_only)
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F
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Driver C ObjC C++ ObjC++ Joined Separate MissingArgError(missing path after %qs)
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-F <dir> Add <dir> to the end of the main framework include path.
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fgimple
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C Var(flag_gimple) Init(0)
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Enable parsing GIMPLE.
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H
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C ObjC C++ ObjC++
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Print the name of header files as they are used.
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I
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C ObjC C++ ObjC++ Joined Separate MissingArgError(missing path after %qs)
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-I <dir> Add <dir> to the end of the main include path.
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M
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C ObjC C++ ObjC++
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Generate make dependencies.
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MD
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C ObjC C++ ObjC++ NoDriverArg Separate MissingArgError(missing filename after %qs)
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Generate make dependencies and compile.
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MF
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C ObjC C++ ObjC++ Joined Separate MissingArgError(missing filename after %qs)
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-MF <file> Write dependency output to the given file.
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MG
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C ObjC C++ ObjC++
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Treat missing header files as generated files.
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MM
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C ObjC C++ ObjC++
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Like -M but ignore system header files.
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MMD
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C ObjC C++ ObjC++ NoDriverArg Separate MissingArgError(missing filename after %qs)
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Like -MD but ignore system header files.
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MP
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C ObjC C++ ObjC++
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Generate phony targets for all headers.
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MQ
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C ObjC C++ ObjC++ Joined Separate MissingArgError(missing makefile target after %qs)
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-MQ <target> Add a MAKE-quoted target.
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MT
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C ObjC C++ ObjC++ Joined Separate MissingArgError(missing makefile target after %qs)
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-MT <target> Add an unquoted target.
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P
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C ObjC C++ ObjC++
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Do not generate #line directives.
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U
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C ObjC C++ ObjC++ Joined Separate MissingArgError(macro name missing after %qs)
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-U<macro> Undefine <macro>.
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Wabi
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C ObjC C++ ObjC++ LTO Var(warn_abi) Warning
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Warn about things that will change when compiling with an ABI-compliant compiler.
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Wabi=
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C ObjC C++ ObjC++ LTO Joined RejectNegative UInteger Warning
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Warn about things that change between the current -fabi-version and the specified version.
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Wabi-tag
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C++ ObjC++ Var(warn_abi_tag) Warning
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Warn if a subobject has an abi_tag attribute that the complete object type does not have.
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Wpsabi
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C ObjC C++ ObjC++ LTO Var(warn_psabi) Init(1) Warning Undocumented LangEnabledBy(C ObjC C++ ObjC++,Wabi)
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Wabsolute-value
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C ObjC Var(warn_absolute_value) Warning EnabledBy(Wextra)
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Warn on suspicious calls of standard functions computing absolute values.
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Waddress
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C ObjC C++ ObjC++ Var(warn_address) Warning LangEnabledBy(C ObjC C++ ObjC++,Wall)
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Warn about suspicious uses of memory addresses.
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Enum
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Name(warn_aligned_new_level) Type(int) UnknownError(argument %qs to %<-Waligned-new%> not recognized)
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EnumValue
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Enum(warn_aligned_new_level) String(none) Value(0)
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EnumValue
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Enum(warn_aligned_new_level) String(global) Value(1)
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EnumValue
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Enum(warn_aligned_new_level) String(all) Value(2)
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Waligned-new
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C++ ObjC++ Alias(Waligned-new=,global,none)
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Warn about 'new' of type with extended alignment without -faligned-new.
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Waligned-new=
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C++ ObjC++ Var(warn_aligned_new) Enum(warn_aligned_new_level) Joined RejectNegative Warning LangEnabledBy(C++ ObjC++,Wall,1,0)
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-Waligned-new=[none|global|all] Warn even if 'new' uses a class member allocation function.
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Wall
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C ObjC C++ ObjC++ Warning
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Enable most warning messages.
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Walloca
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C ObjC C++ ObjC++ Var(warn_alloca) Warning
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Warn on any use of alloca.
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Walloc-size-larger-than=
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C ObjC C++ LTO ObjC++ Var(warn_alloc_size_limit) Joined Host_Wide_Int ByteSize Warning Init(HOST_WIDE_INT_MAX)
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-Walloc-size-larger-than=<bytes> Warn for calls to allocation functions that
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attempt to allocate objects larger than the specified number of bytes.
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Wno-alloc-size-larger-than
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C ObjC C++ LTO ObjC++ Alias(Walloc-size-larger-than=,18446744073709551615EiB,none) Warning
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-Wno-alloc-size-larger-than Disable Walloc-size-larger-than= warning. Equivalent to Walloc-size-larger-than=<SIZE_MAX> or larger.
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Walloc-zero
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C ObjC C++ ObjC++ Var(warn_alloc_zero) Warning
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-Walloc-zero Warn for calls to allocation functions that specify zero bytes.
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Walloca-larger-than=
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C ObjC C++ LTO ObjC++ Var(warn_alloca_limit) Warning Joined Host_Wide_Int ByteSize Init(HOST_WIDE_INT_MAX)
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-Walloca-larger-than=<number> Warn on unbounded uses of
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alloca, and on bounded uses of alloca whose bound can be larger than
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<number> bytes.
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Wno-alloca-larger-than
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C ObjC C++ LTO ObjC++ Alias(Walloca-larger-than=,18446744073709551615EiB,none) Warning
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-Wno-alloca-larger-than Disable Walloca-larger-than= warning. Equivalent to Walloca-larger-than=<SIZE_MAX> or larger.
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Warray-bounds
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LangEnabledBy(C ObjC C++ LTO ObjC++)
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; in common.opt
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Warray-bounds=
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LangEnabledBy(C ObjC C++ LTO ObjC++,Wall,1,0)
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; in common.opt
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Wassign-intercept
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ObjC ObjC++ Var(warn_assign_intercept) Warning
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Warn whenever an Objective-C assignment is being intercepted by the garbage collector.
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Wbad-function-cast
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C ObjC Var(warn_bad_function_cast) Warning
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Warn about casting functions to incompatible types.
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Wbool-compare
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C ObjC C++ ObjC++ Var(warn_bool_compare) Warning LangEnabledBy(C ObjC C++ ObjC++,Wall)
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Warn about boolean expression compared with an integer value different from true/false.
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Wbool-operation
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C ObjC C++ ObjC++ Var(warn_bool_op) Warning LangEnabledBy(C ObjC C++ ObjC++,Wall)
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Warn about certain operations on boolean expressions.
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Wframe-address
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C ObjC C++ ObjC++ Var(warn_frame_address) Warning LangEnabledBy(C ObjC C++ ObjC++,Wall)
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Warn when __builtin_frame_address or __builtin_return_address is used unsafely.
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Wbuiltin-declaration-mismatch
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C ObjC C++ ObjC++ Var(warn_builtin_declaraion_mismatch) Init(1) Warning
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Warn when a built-in function is declared with the wrong signature.
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Wbuiltin-macro-redefined
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C ObjC C++ ObjC++ CPP(warn_builtin_macro_redefined) CppReason(CPP_W_BUILTIN_MACRO_REDEFINED) Var(cpp_warn_builtin_macro_redefined) Init(1) Warning
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Warn when a built-in preprocessor macro is undefined or redefined.
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Wc11-c2x-compat
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C ObjC Var(warn_c11_c2x_compat) Init(-1) Warning
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Warn about features not present in ISO C11, but present in ISO C2X.
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Wc90-c99-compat
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C ObjC CPP(cpp_warn_c90_c99_compat) CppReason(CPP_W_C90_C99_COMPAT) Var(warn_c90_c99_compat) Init(-1) Warning
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Warn about features not present in ISO C90, but present in ISO C99.
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Wc99-c11-compat
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C ObjC Var(warn_c99_c11_compat) Init(-1) Warning
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Warn about features not present in ISO C99, but present in ISO C11.
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Wc++-compat
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C ObjC Var(warn_cxx_compat) CPP(warn_cxx_operator_names) CppReason(CPP_W_CXX_OPERATOR_NAMES) Init(0) Warning
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Warn about C constructs that are not in the common subset of C and C++.
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Wc++0x-compat
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C++ ObjC++ Warning Alias(Wc++11-compat) Undocumented
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Wc++11-compat
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C++ ObjC++ Var(warn_cxx11_compat) Warning LangEnabledBy(C++ ObjC++,Wall) Init(0) CPP(cpp_warn_cxx11_compat) CppReason(CPP_W_CXX11_COMPAT)
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Warn about C++ constructs whose meaning differs between ISO C++ 1998 and ISO C++ 2011.
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Wc++14-compat
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C++ ObjC++ Var(warn_cxx14_compat) Warning LangEnabledBy(C++ ObjC++,Wall)
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Warn about C++ constructs whose meaning differs between ISO C++ 2011 and ISO C++ 2014.
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Wc++1z-compat
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C++ ObjC++ Warning Alias(Wc++17-compat) Undocumented
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Wc++17-compat
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C++ ObjC++ Var(warn_cxx17_compat) Warning LangEnabledBy(C++ ObjC++,Wall)
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Warn about C++ constructs whose meaning differs between ISO C++ 2014 and ISO C++ 2017.
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Wcast-function-type
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C ObjC C++ ObjC++ Var(warn_cast_function_type) Warning EnabledBy(Wextra)
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Warn about casts between incompatible function types.
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Wcast-qual
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C ObjC C++ ObjC++ Var(warn_cast_qual) Warning
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Warn about casts which discard qualifiers.
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Wcatch-value
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C++ ObjC++ Warning Alias(Wcatch-value=, 1, 0)
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Warn about catch handlers of non-reference type.
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Wcatch-value=
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C++ ObjC++ Var(warn_catch_value) Warning Joined RejectNegative UInteger LangEnabledBy(C++ ObjC++,Wall, 1, 0) IntegerRange(0, 3)
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Warn about catch handlers of non-reference type.
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Wchar-subscripts
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C ObjC C++ ObjC++ Var(warn_char_subscripts) Warning LangEnabledBy(C ObjC C++ ObjC++,Wall)
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Warn about subscripts whose type is \"char\".
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Wchkp
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C ObjC C++ ObjC++ Warning Deprecated
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Deprecated in GCC 9. This switch has no effect.
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Wclobbered
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C ObjC C++ ObjC++ Var(warn_clobbered) Warning EnabledBy(Wextra)
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Warn about variables that might be changed by \"longjmp\" or \"vfork\".
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Wcomment
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C ObjC C++ ObjC++ CPP(warn_comments) CppReason(CPP_W_COMMENTS) Var(cpp_warn_comment) Init(0) Warning LangEnabledBy(C ObjC C++ ObjC++,Wall)
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Warn about possibly nested block comments, and C++ comments spanning more than one physical line.
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Wcomments
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C ObjC C++ ObjC++ Warning Alias(Wcomment)
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Synonym for -Wcomment.
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Wconditionally-supported
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C++ ObjC++ Var(warn_conditionally_supported) Warning
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Warn for conditionally-supported constructs.
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Wconversion
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C ObjC C++ ObjC++ Var(warn_conversion) Warning
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Warn for implicit type conversions that may change a value.
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Wconversion-null
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C++ ObjC++ Var(warn_conversion_null) Init(1) Warning
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Warn for converting NULL from/to a non-pointer type.
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Wcpp
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C ObjC C++ ObjC++ CppReason(CPP_W_WARNING_DIRECTIVE)
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; Documented in common.opt
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Wctor-dtor-privacy
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C++ ObjC++ Var(warn_ctor_dtor_privacy) Warning
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Warn when all constructors and destructors are private.
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Wdangling-else
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C ObjC C++ ObjC++ Var(warn_dangling_else) Warning LangEnabledBy(C ObjC C++ ObjC++,Wparentheses)
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Warn about dangling else.
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Wdate-time
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C ObjC C++ ObjC++ CPP(warn_date_time) CppReason(CPP_W_DATE_TIME) Var(cpp_warn_date_time) Init(0) Warning
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Warn about __TIME__, __DATE__ and __TIMESTAMP__ usage.
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Wdeclaration-after-statement
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C ObjC Var(warn_declaration_after_statement) Init(-1) Warning
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Warn when a declaration is found after a statement.
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Wdelete-incomplete
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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.
|
|
|
|
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.
|
|
|
|
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.
|
|
|
|
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-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.
|
|
|
|
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.
|
|
|
|
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.
|
|
|
|
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.
|
|
|
|
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.
|
|
|
|
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-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.
|
|
|
|
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-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.
|
|
|
|
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++ Deprecated
|
|
|
|
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)
|
|
|
|
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) 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) 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++ 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.
|
|
|
|
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.
|
|
|
|
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.
|
|
<number> bytes.
|
|
|
|
Wno-vla-larger-than
|
|
C ObjC C++ LTO ObjC++ Alias(Wvla-larger-than=,18446744073709551615EiB,none) Warning
|
|
-Wno-vla-larger-than Disable Wvla-larger-than= warning. Equivalent to Wvla-larger-than=<SIZE_MAX> or larger.
|
|
|
|
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.
|
|
|
|
fmetrowerks-abi
|
|
C++ ObjC++ Var(flag_metrowerks_abi)
|
|
|
|
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++ Deprecated
|
|
|
|
fallow-parameterless-variadic-functions
|
|
C ObjC Var(flag_allow_parameterless_variadic_functions)
|
|
Allow variadic functions without named parameter.
|
|
|
|
falt-external-templates
|
|
C++ ObjC++ Deprecated
|
|
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 Deprecated
|
|
Deprecated in GCC 9. This switch has no effect.
|
|
|
|
fchkp-check-incomplete-type
|
|
C ObjC C++ ObjC++ LTO Deprecated
|
|
Deprecated in GCC 9. This switch has no effect.
|
|
|
|
fchkp-zero-input-bounds-for-main
|
|
C ObjC C++ ObjC++ LTO Deprecated
|
|
Deprecated in GCC 9. This switch has no effect.
|
|
|
|
fchkp-first-field-has-own-bounds
|
|
C ObjC C++ ObjC++ LTO Deprecated RejectNegative
|
|
Deprecated in GCC 9. This switch has no effect.
|
|
|
|
fchkp-narrow-bounds
|
|
C ObjC C++ ObjC++ LTO Deprecated
|
|
Deprecated in GCC 9. This switch has no effect.
|
|
|
|
fchkp-narrow-to-innermost-array
|
|
C ObjC C++ ObjC++ LTO Deprecated RejectNegative
|
|
Deprecated in GCC 9. This switch has no effect.
|
|
|
|
fchkp-flexible-struct-trailing-arrays
|
|
C ObjC C++ ObjC++ LTO Deprecated
|
|
Deprecated in GCC 9. This switch has no effect.
|
|
|
|
fchkp-optimize
|
|
C ObjC C++ ObjC++ LTO Deprecated
|
|
|
|
fchkp-use-fast-string-functions
|
|
C ObjC C++ ObjC++ LTO Deprecated
|
|
Deprecated in GCC 9. This switch has no effect.
|
|
|
|
fchkp-use-nochk-string-functions
|
|
C ObjC C++ ObjC++ LTO Deprecated
|
|
Deprecated in GCC 9. This switch has no effect.
|
|
|
|
fchkp-use-static-bounds
|
|
C ObjC C++ ObjC++ LTO Deprecated
|
|
Deprecated in GCC 9. This switch has no effect.
|
|
|
|
fchkp-use-static-const-bounds
|
|
C ObjC C++ ObjC++ LTO Deprecated
|
|
Deprecated in GCC 9. This switch has no effect.
|
|
|
|
fchkp-treat-zero-dynamic-size-as-infinite
|
|
C ObjC C++ ObjC++ LTO Deprecated
|
|
Deprecated in GCC 9. This switch has no effect.
|
|
|
|
fchkp-check-read
|
|
C ObjC C++ ObjC++ LTO Deprecated
|
|
Deprecated in GCC 9. This switch has no effect.
|
|
|
|
fchkp-check-write
|
|
C ObjC C++ ObjC++ LTO Deprecated
|
|
Deprecated in GCC 9. This switch has no effect.
|
|
|
|
fchkp-store-bounds
|
|
C ObjC C++ ObjC++ LTO Deprecated
|
|
Deprecated in GCC 9. This switch has no effect.
|
|
|
|
fchkp-instrument-calls
|
|
C ObjC C++ ObjC++ LTO Deprecated
|
|
Deprecated in GCC 9. This switch has no effect.
|
|
|
|
fchkp-instrument-marked-only
|
|
C ObjC C++ ObjC++ LTO Deprecated
|
|
Deprecated in GCC 9. This switch has no effect.
|
|
|
|
fchkp-use-wrappers
|
|
C ObjC C++ ObjC++ LTO Deprecated
|
|
Deprecated in GCC 9. This switch has no effect.
|
|
|
|
static-libmpx
|
|
Driver Deprecated
|
|
Deprecated in GCC 9. This switch has no effect.
|
|
|
|
static-libmpxwrappers
|
|
Driver Deprecated
|
|
Deprecated in GCC 9. This switch has no effect.
|
|
|
|
fcilkplus
|
|
C ObjC C++ ObjC++ LTO Undocumented Ignore
|
|
Deprecated in GCC 8. This switch has no effect.
|
|
|
|
fconcepts
|
|
C++ ObjC++ Var(flag_concepts)
|
|
Enable support for C++ concepts.
|
|
|
|
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-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.
|
|
|
|
fdebug-cpp
|
|
C ObjC C++ ObjC++
|
|
Emit debug annotations during preprocessing.
|
|
|
|
fdeduce-init-list
|
|
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.
|
|
|
|
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)
|
|
-fno-elide-type 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++ Deprecated
|
|
|
|
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++ Deprecated
|
|
|
|
ffor-scope
|
|
C++ ObjC++ Deprecated
|
|
|
|
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 Report 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++ Deprecated
|
|
|
|
fhandle-exceptions
|
|
C++ ObjC++ Optimization Alias(fexceptions) Warn({%<-fhandle-exceptions%> has been renamed %<-fexceptions%> (and is now on by default)})
|
|
|
|
fhonor-std
|
|
C++ ObjC++ Deprecated
|
|
|
|
fhosted
|
|
C ObjC
|
|
Assume normal C execution environment.
|
|
|
|
fhuge-objects
|
|
C++ ObjC++ Deprecated
|
|
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++ Deprecated
|
|
|
|
fkeep-inline-dllexport
|
|
C C++ ObjC ObjC++ Var(flag_keep_inline_dllexport) Init(1) Report Condition(TARGET_DLLIMPORT_DECL_ATTRIBUTES)
|
|
Don't emit dllexported inline functions unless needed.
|
|
|
|
flabels-ok
|
|
C++ ObjC++ Deprecated
|
|
|
|
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.
|
|
|
|
fms-extensions
|
|
C ObjC C++ ObjC++ Var(flag_ms_extensions)
|
|
Don't warn about uses of Microsoft extensions.
|
|
|
|
fmudflap
|
|
C ObjC C++ ObjC++ Deprecated
|
|
|
|
fmudflapth
|
|
C ObjC C++ ObjC++ Deprecated
|
|
|
|
fmudflapir
|
|
C ObjC C++ ObjC++ Deprecated
|
|
|
|
fname-mangling-version-
|
|
C++ ObjC++ Joined Deprecated
|
|
|
|
fnew-abi
|
|
C++ ObjC++ Deprecated
|
|
|
|
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 Report 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++ Deprecated
|
|
|
|
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 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
|
|
; 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)
|
|
-fno-pretty-templates 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++
|
|
Enable automatic template instantiation.
|
|
|
|
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++ Deprecated
|
|
|
|
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++ Deprecated
|
|
|
|
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)
|
|
|
|
ftabstop=
|
|
C ObjC C++ ObjC++ Joined RejectNegative UInteger
|
|
-ftabstop=<number> Distance between tab stops for column reporting.
|
|
|
|
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++ Deprecated
|
|
|
|
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++ Deprecated
|
|
No longer supported.
|
|
|
|
fvtable-thunks
|
|
C++ ObjC++ Deprecated
|
|
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++ Deprecated
|
|
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++
|
|
Conform to the ISO 2020(?) 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++
|
|
Conform to the ISO 2020(?) 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).
|
|
|
|
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.
|