ca5d91aa60
I was trying to cross compile SDL. Many dependencies work, but I ended seeing libX11 not ready for cross compilation. Other xorg libraries cross-compile well. libX11 may need a small patch. The problem is the usual "configure test cannot be run in cross compilation", so the configure script halts. I made the pkgconfig expression always return buildDrv, as I think it rarely will be needed as buildInput. So to avoid rewriting all its mentions to use it as buildNativeInput, I prefered this small change. svn path=/nixpkgs/branches/stdenv-updates/; revision=18500