Hi,
in the faust.SlackBuild, $ARCH is never set. You'll need to add something
like this close to the top:
if [ -z "$ARCH" ]; then
case "$( uname -m )" in
i?86) ARCH=i586 ;;
arm*) ARCH=arm ;;
*) ARCH=$( uname -m ) ;;
esac
fi
Regards,
George