libtool --ltdl vs. autoreconf

[Eric Blake]

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As promised here,
http://lists.gnu.org/archive/html/m4-patches/2006-05/msg00005.html, I
noticed that m4 bootstrap invokes libtoolize --ltdl prior to autoreconf,
which reinvokes libtoolize without --ltdl.  This seems like a bit of a
waste of time, but when I tried removing the explicit libtoolize line, I
got a bootstrap failure that a required file, ltmain.sh, was not found.  I
thought that using LT_CONFIG_LTDL_DIR in configure.ac would take care of
everything that --ltdl used to do on the command line, but I was obviously
mistaken.

Is there another libtool macro that I need to use in configure.ac to
ensure that all needed libtool files are installed at autoreconf time?  Or
should we enhance autoreconf to accept an --ltdl option to pass along to
libtoolize?  It would be nice if we could avoid an explicit libtoolize
pass outside of autoreconf.

- --
Life is short - so eat dessert first!

Eric Blake             address@hidden
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