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| author | Ken Matsui <kmatsui@gcc.gnu.org> | 2023-07-18 15:24:50 -0700 |
|---|---|---|
| committer | Ken Matsui <kmatsui@gcc.gnu.org> | 2023-09-11 08:11:24 -0700 |
| commit | 286655d04678cb61dee9cac43b139571247c4ad1 (patch) | |
| tree | 97b3993ab85c949a470bacbd4936d539c4de0f74 | |
| parent | af91934c2f6b8efc67d625c99068b4761ae5edd0 (diff) | |
| download | gcc-286655d04678cb61dee9cac43b139571247c4ad1.zip gcc-286655d04678cb61dee9cac43b139571247c4ad1.tar.gz gcc-286655d04678cb61dee9cac43b139571247c4ad1.tar.bz2 | |
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 <kmatsui@gcc.gnu.org>
Reviewed-by: Patrick Palka <ppalka@redhat.com>
Reviewed-by: Jonathan Wakely <jwakely@redhat.com>
| -rw-r--r-- | libstdc++-v3/include/bits/c++config | 10 |
1 files changed, 9 insertions, 1 deletions
diff --git a/libstdc++-v3/include/bits/c++config b/libstdc++-v3/include/bits/c++config index 0a41cdd..410c136 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) |