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Last Update 2020/10/25


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--help= ^

実行環境
GCC-8.2.0
GNU C Library 2.28
GNU Binutils 2.31.1

・実行例中の太字表記部分は、コマンドなどの入力された文字列を示します。
・「」や「...」の着色省略表記は、 実際のソースコードや出力内容などを省略加工した部分を示します。

動作テスト


実行結果
$ gcc --help=warnings,^joined warningsに該当するオプションの内、joinedに該当しないオプションを表示 「^」の付いた反転修飾子単独での使用は不可(出力無し) The following options control compiler warning messages: --all-warnings Same as -Wall. Use the latter option instead. --extra-warnings Same as -Wextra. Use the latter option instead. -W This switch is deprecated; use -Wextra instead. Same as -Wextra. -Wabi Warn about things that will change when compiling with an ABI-compliant compiler. -Wabi-tag Warn if a subobject has an abi_tag attribute that the complete object type does not have. -Waddress Warn about suspicious uses of memory addresses. -Wvla Warn if a variable length array is used. -Wvolatile-register-var Warn when a register variable is declared volatile. -Wwrite-strings 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 Warn when a literal '0' is used as null pointer. -Wzerotrip Warn about zero-trip DO loops. -frequire-return-statement Functions which return values must end with return statements. $