https://bugs.gentoo.org/851669
--- a/CommonSource/Utilities/SafeFunctions.h
+++ b/CommonSource/Utilities/SafeFunctions.h
@@ -17,6 +17,7 @@
 #include <cstdio>
 #include <cstdarg>
 #include <cstring>
+#include <ctime>
 #include <stdio.h>
 #include <stdlib.h>
 #include <errno.h>