From: Ken Matsui Date: Tue, 18 Jul 2023 22:24:50 +0000 (-0700) Subject: libstdc++: Define _GLIBCXX_USE_BUILTIN_TRAIT X-Git-Tag: basepoints/gcc-15~6295 X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=286655d04678cb61dee9cac43b139571247c4ad1;p=thirdparty%2Fgcc.git libstdc++: Define _GLIBCXX_USE_BUILTIN_TRAIT This patch defines _GLIBCXX_USE_BUILTIN_TRAIT macro, which will be used as a flag to toggle the use of built-in traits in the type_traits header through _GLIBCXX_DO_NOT_USE_BUILTIN_TRAITS macro, without needing to modify the source code. libstdc++-v3/ChangeLog: * include/bits/c++config (_GLIBCXX_HAS_BUILTIN): Do not undef. (_GLIBCXX_USE_BUILTIN_TRAIT): Define. Signed-off-by: Ken Matsui Reviewed-by: Patrick Palka Reviewed-by: Jonathan Wakely --- diff --git a/libstdc++-v3/include/bits/c++config b/libstdc++-v3/include/bits/c++config index 0a41cdd29a9a..410c136e1b11 100644 --- a/libstdc++-v3/include/bits/c++config +++ b/libstdc++-v3/include/bits/c++config @@ -854,7 +854,15 @@ namespace __gnu_cxx # define _GLIBCXX_HAVE_BUILTIN_LAUNDER 1 #endif -#undef _GLIBCXX_HAS_BUILTIN +// Returns 1 if _GLIBCXX_DO_NOT_USE_BUILTIN_TRAITS is not defined and the +// compiler has a corresponding built-in type trait, 0 otherwise. +// _GLIBCXX_DO_NOT_USE_BUILTIN_TRAITS can be defined to disable the use of +// built-in traits. +#ifndef _GLIBCXX_DO_NOT_USE_BUILTIN_TRAITS +# define _GLIBCXX_USE_BUILTIN_TRAIT(BT) _GLIBCXX_HAS_BUILTIN(BT) +#else +# define _GLIBCXX_USE_BUILTIN_TRAIT(BT) 0 +#endif // Mark code that should be ignored by the compiler, but seen by Doxygen. #define _GLIBCXX_DOXYGEN_ONLY(X)