Index: libcc1/connection.cc
--- libcc1/connection.cc.orig
+++ libcc1/connection.cc
@@ -20,6 +20,7 @@ along with GCC; see the file COPYING3.  If not see
 #include <cc1plugin-config.h>
 #include <string>
 #include <unistd.h>
+#include <sys/select.h>
 #include <sys/types.h>
 #include <string.h>
 #include <errno.h>