My first contribution to an open source project
Changed some OpenPilot defines in the build Makefiles
Corrected the qt library paths in qt.conf
Commented out the line in package/Linux.mk which causes the build to fail. Basically the define udevdir is not set, so this leads to mkdir failure. As nothing is installed currently in the udevdir, I commented the line out (as this may be a misunderstanding on my part).
It compiles ok on Linux; I haven't tested the other platforms but I wouldn't expect a problem.