qt - Force qmake to error out when reading undefined variables -

i need force qmake have set -eu in bash, this:

$ bash -eu -c 'echo $foo; echo carrying on' bash: foo: unbound variable $ echo $? 1

results in failure, , not print "carrying on".

does qmake support option "reading undefined variable error"?

for qmake variables can use isempty() is. checking environment variables there dirty hack:

var = $$(foo) isempty(var) {     message(empty) } else {     message(foo $(foo)) }

test:

$ qmake project message: empty $ foo=test qmake project message: foo test

Braziel