[marcos@x mesa]$ head config.log
This file contains any messages produced by compilers while
running configure, to aid debugging if configure makes a mistake.

It was created by Mesa configure 11.1.0-devel, which was
generated by GNU Autoconf 2.69.  Invocation command line was

  $ ./configure --with-gallium-drivers=nouveau,swrast --with-dri-drivers=i965 --enable-gallium-llvm --enable-texture-float --enable-debug --prefix=/home/marcos/mesa_install