build: sanity check options
Fail when tests/documentation is enabled without libraries. Fail when neither scanner nor libraries is enabled, because we don't build anything in that case.
Signed-off-by: Simon Ser contact@emersion.fr
Fail when tests/documentation is enabled without libraries. Fail when neither scanner nor libraries is enabled, because we don't build anything in that case.
Signed-off-by: Simon Ser contact@emersion.fr