Include strings.h which is needed for strcasemp. Some systems declare them

in string.h, but it should be possible to include both.

server/main.c

@@ -31,6 +31,7 @@
 #include <stdlib.h>
 #include <stdio.h>
 #include <string.h>
+#include <strings.h>
 #include <signal.h>
 #include <unistd.h>
 #ifndef WIN32