https://github.com/troglobit/smcroute/commit/6036e4879cbb1b4a21224791fcf03b6daaa18417

Index: src/socket.c
--- src/socket.c.orig
+++ src/socket.c
@@ -31,6 +31,7 @@
 #include <time.h>
 #include <unistd.h>
 #include <netinet/in.h>
+#include <sys/select.h>
 #include <sys/socket.h>
 #include <sys/types.h>
 
