Ask HN: Cross platform build testing?

Does anyone know of a good cross-platform build testing service? Ideally I'd like to be able to upload a source tarball and have tar -xf and make run on different versions of {FreeBSD, OpenBSD, NetBSD, Redhat, Fedora, Ubuntu, Debian, SUSE, Slackware, AIX, GNU/Hurd, IRIX, Minix, OS X, Solaris, Cygwin} running on {i386, amd64, powerpc, sparc, arm, mips}, using different versions of {gcc, clang/llvm, icc}.

Obviously I'd be satisfied with far less than this, but I can't find anything which is even remotely close. I'm finding lots of "build farms" which individual open source projects have set up for themselves, but nothing available to the open source community at large.

Can anyone help me out here?