Time to dive into GCC:
git clone git://gcc.gnu.org/git/gcc.git
Why? Because I used gccxml to build a wrapper generator for LibertyEiffel. Nowadays gccxml is not updated to the unyielding march of gcc releases so it has been lagging behind to the point that while it still easily parse POSIX headers and several GNU libraries (namely Gtk and other GObject libraries) it fails to parse the C++ library that I wich most to wrap: Qt.
Also interfacing with GCC is today far, far easier compared to some years ago. Actually interfacing with Gcc looked like sheer black magic to me when I started wrappers-generator. I can’t believe almost 8 years have already been passed!