A German introduction can be found .
(yet has to be translated into english).
Public Git repository: git://pubgit.metux.de/projects/briegel.git
Toolchains should be built using crosstool-ng (even other's might
also work, as long as they properly support sysroot).
Fixed/cleaned sourcetrees for various packages can be directly
retrieved from the OSS-QM project: https://sourceforge.net/p/oss-qm/home/
(Briegel supports direct fetching via git, so no additional tarball
downloading and patching is required)