Run "make" to start compilation.

Other targets:
 * make install      same as "make"
 * make prebuilt     fetch and install prebuilt binaries
 * make list         list packages
 * make fetch        fetch required source tarballs
 * make fetch-all    fetch all source tarballs
 * make distclean    clean everything and undo bootstrap
 * make mostlyclean  clean everything except source tarballs
 * make clean        clean everything
 * make package      prepare prebuilt packages
 * make help         show this text
