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| author | Jonathan Wakely <jwakely@redhat.com> | 2019-07-26 13:36:36 +0000 |
|---|---|---|
| committer | Jonathan Wakely <jwakely@redhat.com> | 2019-07-26 13:36:36 +0000 |
| commit | 277805b1c3354c542b643b1d107dda21125f7af4 (patch) | |
| tree | 8cabb880c2b4aef3967c456f6324a224d6ad0671 /libstdc++-v3 | |
| parent | f5ba42eb97b32a9e1dd9786e3d6f021e1a450967 (diff) | |
Fix preprocessor checks for Clang builtins
Clang seems to define built-ins that start with "__builtin_" as
non-keywords, which means that we need to use __has_builtin to detect
them, not __is_identifier. The built-ins that don't start with
"__builtin_" are keywords, and can only be detected using
__is_identifier and not by __has_builtin.
Backport from mainline
2019-07-02 Jonathan Wakely <jwakely@redhat.com>
* include/bits/c++config (_GLIBCXX_HAVE_BUILTIN_LAUNDER)
(_GLIBCXX_HAVE_BUILTIN_IS_CONSTANT_EVALUATED): Use __has_builtin
instead of __is_identifier to detect Clang support.
git-svn-id: https://gcc.gnu.org/svn/gcc/branches/gcc-9-branch@273832 138bc75d-0d04-0410-961f-82ee72b054a4
Diffstat (limited to 'libstdc++-v3')
| -rw-r--r-- | libstdc++-v3/ChangeLog | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/libstdc++-v3/ChangeLog b/libstdc++-v3/ChangeLog index 1c6e5592bf4..d60df1790cd 100644 --- a/libstdc++-v3/ChangeLog +++ b/libstdc++-v3/ChangeLog @@ -1,6 +1,15 @@ 2019-07-26 Jonathan Wakely <jwakely@redhat.com> Backport from mainline + 2019-07-02 Jonathan Wakely <jwakely@redhat.com> + + * include/bits/c++config (_GLIBCXX_HAVE_BUILTIN_LAUNDER) + (_GLIBCXX_HAVE_BUILTIN_IS_CONSTANT_EVALUATED): Use __has_builtin + instead of __is_identifier to detect Clang support. + +2019-07-26 Jonathan Wakely <jwakely@redhat.com> + + Backport from mainline 2019-05-23 Jonathan Wakely <jwakely@redhat.com> * doc/xml/manual/status_cxx2017.xml: Add feature test macro for |