Problem with autoconf 2.52

[David Snopek]

This is not exactly a bug, but it does require an extra step inorder to 
work properly.  Here is the situation:

Imagine that you're including libltdl as a convenience library in a 
package (using "libtoolize --ltdl"), and specify 
"AC_CONFIG_SUBDIRS(libltdl)" in your configure.in.  You're using 
autoconf 2.52 to generate the configure script.

Under most situations, this runs fine.  But there are weird problems 
that can happen because the "configure" in libltdl was generated using 
2.13.  Most notably, specifying any host, target, or build option will 
cause libltdl's configure to exit with error.

This can be solved a couple of ways:

(1) Using "libtoolize --ltdl --copy" and running "aclocal ; autoconf ; 
automake" in the libltdl directory.
(2) Generating the original copy (located in 
${prefix}/share/libtool/libltdl) with the newest version of autoconf 
since I believe they are all "forward-compatible".
(3) Cause the "configure" in libltdl to be regenerated with using the 
local system autoconf when "libtoolize --ltdl" is called.  I think this 
is the most elegant solution.

In any case, I think the user should be warned.  This should be put in a 
FAQ or added to the info pages on libltdl.

If anyone has any additional questions or comments, please e-mail me 
directly as I am not subscribed to the list.  I hope this helps somebody!!

        -- David Snopek

/-- libksd --
| The C++ Cross-Platform Game Framework
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