[ -d /opt/local/gap4 ] || mkdir -p /opt/local/gap4
tar cf - . | (cd /opt/local/gap4 && tar xvf -)
chown -R root:admin /opt/local/gap4 &&
(cd /opt/local/gap4 &&
export COPTS='-arch ppc -arch i386 -isysroot /Developer/SDKs/MacOSX10.4u.sdk -mmacosx-version-min=10.4' 'LOPTS=-arch ppc -arch i386 -isysroot /Developer/SDKs/MacOSX10.4u.sdk -mmacosx-version-min=10.4'
./configure --prefix=/opt/local/gap4 &&
make
)