portlint gives false positives about PYQT related variables. This can be seen
with the following.
$ ( cd /usr/ports/graphics/py-traitsui ; portlint -Ca )
WARN: Makefile: When USES=pyqt:5 is defined, you must also define USE_PYQT=xxxx
0 fatal errors and 1 warning found.
I propose a patch adding USE_PYQT to @varlist and checking $makevar if static
text analysis does not find the variable. This fixes the bug for me, but you
better carefully test the patch, since I do not use Perl myself.
The patch also bumps the port version, sorry if that disturbs...
port test : OK
poudriere : OK
portlint -Ca: OK