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