@gppezzi, @pforai, @wpoely86: review/feedback?

EasyBuild framework unit test suite PASSed (see https://jenkins1.ugent.be/job/easybuild-framework-pr-builder/2788/console for more details).

This pull request is now ready for review/testing.

Please try and find someone who can tackle this; contact @boegel if you're not sure what to do.

Ideally Cray should fix that on their module files. But maybe they consider not setting a variable for fftw root as a feature, so it's good to be able to workaround that.

thx @boegel

Well, I'm guessing they wouldn't be willing to change existing module files...

And this is a useful feature regardless.

looks good but maybe name it root instead of prefix to be consistent?

@wpoely86: well, root is confusing (could mean the root user). You could argue the same for $EBROOT... of course, but there it's kind of clear from the context, I hope.

Also, we can't just rename that now, the support for providing metadata for external modules is not experimental by itself, that's a stable feature.

Thanks for the review @wpoely86!