CXX=aCC CC=cc ./configure --prefix=/usr/local
make
make install
make distclean
CXX=g++ CC=gcc ./configure --prefix=/usr/local --libdir=/usr/local/lib/pa20_64 --bindir=/usr/local/bin/pa20_64
make
make install
mv /usr/local/bin/make /usr/local/bin/gmake
mv /usr/local/bin/pa20_64/make /usr/local/bin/pa20_64/gmake