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-rw-r--r--libcxx/fuzzing/fuzzing.cpp4
1 files changed, 4 insertions, 0 deletions
diff --git a/libcxx/fuzzing/fuzzing.cpp b/libcxx/fuzzing/fuzzing.cpp
index d036f0cbb8b..7e58dba0c27 100644
--- a/libcxx/fuzzing/fuzzing.cpp
+++ b/libcxx/fuzzing/fuzzing.cpp
@@ -39,6 +39,10 @@
#include <cassert>
// If we had C++14, we could use the four iterator version of is_permutation and equal
+#ifndef _LIBCPP_VERSION
+#error These test should be built with libc++ only.
+#endif
+
namespace fuzzing {
// This is a struct we can use to test the stable_XXX algorithms.
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