Index: quickjs-libc.c
--- quickjs-libc.c.orig
+++ quickjs-libc.c
@@ -55,6 +55,11 @@ typedef sig_t sighandler_t;
 #endif
 #endif /* __APPLE__ */
 
+#if defined(__OpenBSD__)
+typedef sig_t sighandler_t;
+extern char **environ;
+#endif
+
 #endif
 
 #if !defined(_WIN32)