https://bugs.gentoo.org/866932
--- a/socket.c
+++ b/socket.c
@@ -29,6 +29,7 @@
 #include <poll.h>
 #include <resolv.h>
 #include <stdlib.h>
+#include <stdio.h>
 #include <string.h>
 #include <unistd.h>
 #if HAVE_ERR