--- /dev/null
+#pragma once
+
+#include "mem_config.h"
+
+#if defined __cplusplus
+# include <cstdlib>
+#else
+# include <stdlib.h>
+#endif
+
+#if !defined HAVE_REALPATH
+# if defined _WIN32
+# if defined __cplusplus
+extern "C" {
+# endif
+char *realpath(const char *path, char real[_MAX_PATH]);
+# if defined __cplusplus
+}
+# endif
+# endif // _WIN32
+#endif // HAVE_REALPATH