[launchd-dev] Compiling launchd

Dear all, I tried to compile launchd, and I failed. I downloaded the tarball and ran Xcode on launchd.xcodeproj It needs private headers from CoreFoundation or DiskArbitration, which I can download. But I don't know how to find many .defs files that are also needed. For example, Xcode is looking for a /usr/local/include/xpc/domain.defs and there is apparently no such file on http://www.opensource.apple.com What should I do? Thanks, Louis