Re: The demo subdirs

[Tim Van Holder]

> Current HEAD seems to work okay for me (post Paolo Bonzini's
> autoconf-2.50

Most of this seems automake related.

Start: clean tree
Run bootstrap
 -> no libtool or ltmain.sh present
Run configure
 -> libtool NOT created (no ltmain.sh, and no Makefile to use to
    build ltmain.sh)
Run make
 -> make will see libtool missing, and run config.status --recheck
    to build it.  configure will see no ltmain.sh, so it will run
    make to build ltmain.sh.  make will run 'config.status --recheck'
    again, resulting in an infinite loop.
    The same happens if configure is re-run, or even if
    'make ltmain.sh' is run.  The apparent cause is the automake I use
    (a CVS snapshot); it adds a rule

$(top_builddir)/config.status: $(srcdir)/configure
$(CONFIG_STATUS_DEPENDENCIES)
        $(SHELL) ./config.status --recheck

    to the makefile, and since Makefile depends on config.status, this
    gets triggered all the time.
    Removing it allows building ltmain.sh - the saga continues:
Run make
 -> ltmain.sh is built, and config.status --recheck is run, libtool is
    created.  make descends into libltdl - there the build stops because
    libtool is not found ($(OBJECTS) depends on libtool, but there is
    no OBJECTS variable, just libltdl(c)_la_OBJECTS)

Run make distclean
 -> fails immediately (it enters tagdemo, which has no Makefile, and
    therefore no distclean target).

Basically, we want config.status to be the one to create both ltmain.sh
and libtool; otherwise, make can really screw things up (especially in
combination with recent automakes).
And I think we want configure to configure the demo subdirs as well.

I'll take a stab at the 2.50-fication of the creation of libtool/ltmain.sh
next week.