--- env_c.vhdl	2014-11-20 11:18:24.210947993 +0100
+++ env_c.vhdl_patched	2014-11-20 11:18:38.578652227 +0100
@@ -30,7 +30,7 @@
       1 ms, 10 ms, 100 ms,
       1 sec, 10 sec, 100 sec,
       1 min, 10 min, 100 min,
-      1 hr, 10 hr, 100 hr
+      1 hr  --, 10 hr, 100 hr (removed for GHDL)
       ) ;
 
   function RESOLUTION_LIMIT return DELAY_LENGTH is