cd gecode-release-6.2.0/

#make CXXUSR="-lgecodegist -I/home/user/Qt5.14.2/5.14.2/gcc_64/include/ -L/home/user/Qt5.14.2/5.14.2/gcc_64/lib/ -I/usr/local/include/python3.7m -L/usr/local/lib/libpython3.7m.a -lpython3.7m"

make CXXUSR="-I/usr/local/include/python3.7m -L/usr/local/lib/libpython3.7m.a -lpython3.7m"

sudo make install
