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-rw-r--r--config.tests/unix/c++11/c++11.cpp7
1 files changed, 6 insertions, 1 deletions
diff --git a/config.tests/unix/c++11/c++11.cpp b/config.tests/unix/c++11/c++11.cpp
index d541144bf9..671723647e 100644
--- a/config.tests/unix/c++11/c++11.cpp
+++ b/config.tests/unix/c++11/c++11.cpp
@@ -42,7 +42,12 @@
#if __cplusplus >= 201103L || defined(__GXX_EXPERIMENTAL_CXX0X__)
// Compiler claims to support C++11, trust it
#else
-# error "__cplusplus must be >= 201103L"
+# error "__cplusplus must be >= 201103L, or __GXX_EXPERIMENTAL_CXX0X__ must be defined"
+#endif
+
+#include <utility>
+#if defined(__clang__) && !defined(_LIBCPP_VERSION)
+# error "C++11 with clang requires libc++ runtime"
#endif
int main(int, char **) { return 0; }