mesa3d 18.5 for ubuntu 16.04
https://archive.mesa3d.org/
tar zxf mesa...tar.gz
cd mesa...
$ ./configure --with-llvm-prefix=/usr/lib/llvm-8/ --with-gallium-drivers=radeonsi --with-dri-driver=radeon
vim ./configure
# implicit-function ...
$make
#sudo make install
inxi -Fxz
sudo apt install mesa-utils
glxinfo | grep OpenGL
