Bugzilla Bug 57828

If you compile a binary package, then portage should record the USE flags used
when compiling that package into the package binary. This would help building
automated installations in a heterogeneous environment. The typical case is
that you have packages A and B. With default USE flags, A would depend on B,
but you don't want A to use B even though you're going to install B on some
computers. So you build a binary package with:

USE="-B" emerge -b A

Now you can't run emerge -K A on a computer where you don't need B at all (even
though the binary package A does nothing with B), without having B installed,
or you need to supply the USE flag again. The whole process is very
frustrating, because you need to record every special USE flag you've used to
compile every package...

Reproducible: Always
Steps to Reproduce:
1.
2.
3.

Err... It *is* recorded in the tbz2.
What you're after is the ability to depend (or rdepend in your case) on packages w/ a use flag enabled, which is a dupe.

*** This bug has been marked as a duplicate of 2272 ***