2. the rules for local-install-files badly fail (at least when $(srcdir)!=.).
With automake 1.8.3 $(DISTFILES) contains several entries which already have
an explicit $(srcdir) attached. The code I have inserted is a simplified
version of the automake-generated code for the `distdir' target.
Wouldn't it be much better (less fragile) to have all that done via
automake, e.g. with
ltldir = $(datadir)/libtool/libltdl
ltl_DATA = COPYING.LIB Makefile.am Makefile.in README .... ltmain.sh
ltl_SCRIPTS = config.guess config.sub configure .... missing
or similar.