r273832 - /branches/gcc-9-branch/libstdc++-v3/C...
redi@gcc.gnu.org
redi@gcc.gnu.org
Fri Jul 26 13:36:00 GMT 2019
Author: redi
Date: Fri Jul 26 13:36:36 2019
New Revision: 273832
URL: https://gcc.gnu.org/viewcvs?rev=273832&root=gcc&view=rev
Log:
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.
Modified:
branches/gcc-9-branch/libstdc++-v3/ChangeLog
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