Comment 4 for bug 490811

Actually it seems to be an issue in other scenarios as well: I couldn't get pkg-config to give me cflags or libs for one specific library, even though that library's dependencies were fully satisfied, and I was mystified until I tried running "pkg-config --list-all" and saw the error message pertaining to a missing drm.pc. After installing libdrm-dev, everything worked fine. So this can affect other people as well. Besides, at the end of the day, isn't this still a broken package that should get fixed?