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-rw-r--r--boost/core/demangle.hpp5
1 files changed, 4 insertions, 1 deletions
diff --git a/boost/core/demangle.hpp b/boost/core/demangle.hpp
index 44aeb8ded7..f13c26a7f4 100644
--- a/boost/core/demangle.hpp
+++ b/boost/core/demangle.hpp
@@ -17,7 +17,10 @@
# pragma once
#endif
-#if defined( __clang__ ) && defined( __has_include )
+// __has_include is currently supported by GCC and Clang. However GCC 4.9 may have issues and
+// returns 1 for 'defined( __has_include )', while '__has_include' is actually not supported:
+// https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63662
+#if defined( __has_include ) && (!defined( BOOST_GCC ) || (__GNUC__ + 0) >= 5)
# if __has_include(<cxxabi.h>)
# define BOOST_CORE_HAS_CXXABI_H
# endif