Clock implementation for cc65
diff --git a/contiki-cc65/lib/clock.c b/contiki-cc65/lib/clock.c
new file mode 100644
index 0000000..ea75c93
--- /dev/null
+++ b/contiki-cc65/lib/clock.c
@@ -0,0 +1,7 @@
+#include <time.h>
+
+clock_time_t
+clock_time(void)
+{
+  return clock();
+}