echo "$1 not found"
NEEDED="$NEEDED .$1"
else
+ if [ "$1" = "xz" ] && ! tar PcJ /dev/null >/dev/null
+ then
+ echo "tar doesn't support xz (J option)"
+ NEEDED="$NEEDED .tar"
+ fi
# found, need to check version ?
[ -z "$2" ] && return # no
# we only check GNU tools, their version have the form MAJOR.MINOR