Mesa is built with:

 ./autogen.sh --prefix=/usr --sysconfdir=/etc
--with-dri-driverdir=/usr/lib/xorg/modules/dri
--with-gallium-drivers=r300,r600,radeonsi,nouveau,swrast,svga
--with-egl-platforms=x11,wayland,drm --enable-gallium-llvm --enable-gallium-egl
--enable-glx-tls --enable-glx --enable-gles1 --enable-gles2 --enable-egl
--enable-r600-llvm-compiler --enable-shared-glapi --enable-texture-float
--enable-xa --enable-gbm --enable-osmesa --enable-vdpau