find ./ -maxdepth 3 -type f -name "*Makefile" |xargs sed -i "s/CXX = g++/CXX = ccache g++/g"
find ./ -maxdepth 3 -type f -name "*makefile" |xargs sed -i "s/CXX = g++/CXX = ccache g++/g"
find ./ -maxdepth 3 -type f -name "*makefile" |xargs sed -i "s/CXX = g++/CXX = ccache g++/g"