Building Robert Bragg's drm mesa

If you are unfamiliar with the build process for drm/Mesa, these instructions should get you going. Change {exec_path} before executing the commands.

For drm

git clone -b wip/rib/oa-next https://github.com/rib/drm.git
cd drm
autoreconf --install -s
./configure --prefix {exec_path}
make install
cd ..

For Mesa

git clone -b wip/rib/oa-next https://github.com/rib/mesa.git
cd mesa
autoreconf --install -s
PKG_CONFIG_PATH={exec_path}/lib/pkgconfig ./configure --with-egl-platforms=x11,drm,surfaceless --enable-glx-tls --enable-gles1 --enable-gles2 --with-dri-drivers=i965 --prefix {exec_path}
make install