tests: revert to _XOPEN_SOURCE=500 on Linux

diff --git a/tests/test.h b/tests/test.h
index 948ea3156d11f55d5ca13fe3a86f7f2a4d933c02..e83d4e07e7d7249bdba3d299d8c52191e526234c 100644 (file)
--- a/tests/test.h
+++ b/tests/test.h
@@ -16,7 +16,9 @@
 
 #pragma once
 
-#define _BSD_SOURCE
+#ifdef __linux__
+#define _XOPEN_SOURCE 500
+#endif
 
 #include <stdlib.h>
 #include <stdarg.h>