1make: Bad conditional expression `variable expression == "literal"' in variable expression == "literal"?bad:bad 2make: "varmod-ifelse.mk" line 27: Malformed conditional (${${:Uvariable expression} == "literal":?bad:bad}) 3make: Bad conditional expression ` == ""' in == ""?bad-assign:bad-assign 4make: Bad conditional expression ` == ""' in == ""?bad-cond:bad-cond 5make: "varmod-ifelse.mk" line 44: Malformed conditional (${${UNDEF} == "":?bad-cond:bad-cond}) 6make: Fatal errors encountered -- cannot continue 7make: stopped in unit-tests 8exit status 1 9