1make: directive-export-gmake.mk:71: Invalid line "export VAR=${:U1}", expanded to "export VAR=1" 2 in .for loop from directive-export-gmake.mk:67 with value = 1 3make: directive-export-gmake.mk:85: 16:00:00 4make: directive-export-gmake.mk:92: Variable/Value missing from "export" 5make: Fatal errors encountered -- cannot continue 6make: stopped in unit-tests 7exit status 1 8