goes to Dan Nicholson for adding autoconf support to mesa. For the first time, mesa can now pick up libdrm from a non-standard location (say, ~krh/install/lib/libdrm.so) automatically through pkg-config. With that, it's possible to build the entire X/DRI/OpenGL stack in a non-standard prefix, so you can work on the stack, without having to overwrite system libraries. And it's a simple and clean solution that can co-exist with the old hand-rolled config system. Good work!