Comment 8 for bug 379592

For most packages it is unknown if the work when cross-compiled (build correctly and work afterwards) and it must be supported by upstream (using the right binaries during compilation). An alternative would by emulation but I don't know how fast and reliable it is (you don't want to start fixing build failures which only happen in the emulation or broken packages which compile in the emulation but don't work for some reason on the real hardware).