mkdir -p extra/usr
chmod +x ./waf  
./waf configure --prefix=/usr
./waf build # --prefix=/usr
./waf install --prefix=/usr --destdir=./extra 
#chmod +x ./setup.py 
#python ./setup.py build # --prefix=/usr 
#python ./setup.py install --prefix=/usr --root=extra 
#./auto.SlackBuild