gentoo-overlay/sys-apps/kmscon/files/kmscon-sysmacros-fix.patch

diff -ur a/src/uterm_vt.c b/src/uterm_vt.c
--- a/src/uterm_vt.c	2017-08-12 12:14:46.213183769 -0500
+++ b/src/uterm_vt.c	2017-08-12 12:16:12.011069210 -0500
@@ -40,6 +40,7 @@
 #include <sys/ioctl.h>
 #include <sys/signalfd.h>
 #include <sys/stat.h>
+#include <sys/sysmacros.h>
 #include <termios.h>
 #include <time.h>
 #include <unistd.h>