Comment 39 for bug 286906

(In reply to comment #21)

> Nothing prevents you to build spidermonkey from firefox and ship it in
> /usr/lib. That's what we do in Debian, and it has worked for a quite long time.

Sure, though clearly separate tarballs are better. The larger question is what you do about the mozilla-js.pc file; in this case then, xulrunner-dev wouldn't be providing it, right? Or do you have separate .pc files?