libtoolize --ltdl copies old version of configure script

[Brent Goodrick]

The libtoolize --ltdl --copy switch copies an old configure script
into the ./libltdl directory.  Thats good, but the problem is that the
configure script that is copied does not handle VAR=value options on
the command line.  The configure script that invokes it passes
arguments for values for CC, CXX etc. via this mechanism, and thus
expects the ./libltdl/configure script to respect it.

My hunch is that the configure script that comes bundled with libtool
1.4.3 is made using autoconf 2.13, and the autoconf I'm using is
2.57.  So, if this a real bug, then the solution could always be to
have the libtool's libltdl configure script be kept in sync with
autoconf if that were feasible.

My workaround is to simply rerun autoconf to regenerate the configure
script inside the libltdl subdirectory of my package.

Thanks,
Brent Goodrick