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diff --git a/src/fmt/test/detect-stdfs.cc b/src/fmt/test/detect-stdfs.cc
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+// Formatting library for C++ - tests of formatters for standard library types
+//
+// Copyright (c) 2012 - present, Victor Zverovich
+// All rights reserved.
+//
+// For the license information refer to format.h.
+
+#include <exception> // _GLIBCXX_RELEASE & _LIBCPP_VERSION
+
+#if defined(_GLIBCXX_RELEASE) && _GLIBCXX_RELEASE == 8
+# error libfound "stdc++fs"
+#elif !defined(__apple_build_version__) && defined(_LIBCPP_VERSION) && \
+ _LIBCPP_VERSION >= 7000 && _LIBCPP_VERSION < 9000
+# error libfound "c++fs"
+#else
+// none if std::filesystem does not require additional libraries
+# error libfound ""
+#endif