On Wed, 2021-12-15 at 15:05 +0100, R. Diez wrote: > Is there a better way?
I think if $(words $(PATH_TO_CHECK)) is 1, then it's OK and if it's >1 then it contains whitespace. You can write a test using $(if ...) rather than using ifeq, then it can be put anywhere: $(if $(filter-out 1,$(words $(PATH_TO_CHECK))),$(error spaces found)) Just to note this will also say "spaces found" if the variable is empty... you'll have to check that separately if it's something to be concerned about.
