...
plugins/elements/Makefile.am:7: Libtool library used but `LIBTOOL' is undefined
plugins/elements/Makefile.am:7:
plugins/elements/Makefile.am:7: The usual way to define `LIBTOOL' is to add `AC_PROG_LIBTOOL'
plugins/elements/Makefile.am:7: to `configure.ac' and run `aclocal' and `autoconf' again.
...
[ad nauseum]