--- compat/getopt.c.orig	2020-12-30 05:06:26.000000000 -0500
+++ compat/getopt.c	2020-12-30 05:11:31.000000000 -0500
@@ -43,6 +43,7 @@
 #endif
 
 #include <stdio.h>
+#include <string.h>
 
 /* Comment out all this code if we are using the GNU C Library, and are not
    actually compiling the library itself.  This code is part of the GNU C