xkb/Makefile.am:1: Libtool library used but `LIBTOOL' is undefined
xkb/Makefile.am:1:
xkb/Makefile.am:1: The usual way to define `LIBTOOL' is to add `AC_PROG_LIBTOOL'
xkb/Makefile.am:1: to `configure.ac' and run `aclocal' and `autoconf' again.