libtoolize --acdir --ltdir?

[Rusty Ballinger]

It's nice that autoconf's --macrodir and automake's --amdir let you specify
alternate directories to load files from.  Unfortunately, when automake
calls libtoolize, it appears that there's no way for it to tell libtoolize
to use a different pkgdatadir or aclocaldir.

One approach would be to add --acdir and --ltdir command-line arguments to
both libtoolize and automake, and make automake pass these on to libtoolize.
(I will be happy to send patches if this seems reasonable.)  Is there a
better approach?

--Rusty