>From 56c4a18d0d8c8ce7aa1239880138775e4db06645 Mon Sep 17 00:00:00 2001 From: Katsuhiko Nishimra <ktns...@gmail.com> Date: Thu, 27 Jul 2017 16:03:54 +0900 Subject: [PATCH] libstdc++: Support std::is_aggregate on clang++
Currently, libstdc++ tries to detect __is_aggregate built-in macro using __has_builtin, but this fails on clang++ because __has_builtin on clang++ detects only built-in functions, not built-in macros. This patch adds a test using __is_identifier. Tested on clang++ 5.0.0-svn308422-1~exp1 and g++ 7.1.0-10 from Debian unstable. --- libstdc++-v3/include/std/type_traits | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/libstdc++-v3/include/std/type_traits b/libstdc++-v3/include/std/type_traits index 390b6f40a..e7ec402fb 100644 --- a/libstdc++-v3/include/std/type_traits +++ b/libstdc++-v3/include/std/type_traits @@ -2894,6 +2894,11 @@ template <typename _From, typename _To> #if __GNUC__ >= 7 # define _GLIBCXX_HAVE_BUILTIN_IS_AGGREGATE 1 +#elif defined(__is_identifier) +// For clang +# if ! __is_identifier(__is_aggregate) +# define _GLIBCXX_HAVE_BUILTIN_IS_AGGREGATE 1 +# endif #elif defined __has_builtin // For non-GNU compilers: # if __has_builtin(__is_aggregate) -- 2.13.3
