On Thursday 24 February 2011, Jack Kelly wrote:
> Version: 1.11.1 (ubuntu 10.10). I have inspected the most recent
> master and it appears to also have this bug.
> 
> configure.ac:
> AC_INIT([a], [b], [c])
> AM_INIT_AUTOMAKE([foreign])
> dnl no LT_INIT -- on purpose
> AC_PROG_CC
> AC_CONFIG_FILES([Makefile])
> AC_OUTPUT
> 
> Makefile.am:
> lib_LTLIBRARIES = libfoo.la
> 
> Run autoreconf -i:
> $ autoreconf -i
> Makefile.am:1: Libtool library used but `LIBTOOL' is undefined
> Makefile.am:1:   The usual way to define `LIBTOOL' is to add `AC_PROG_LIBTOOL'
> Makefile.am:1:   to `configure.ac' and run `aclocal' and `autoconf' again.
> Makefile.am:1:   If `AC_PROG_LIBTOOL' is in `configure.ac', make sure
> Makefile.am:1:   its definition is in aclocal's search path.
> autoreconf: automake failed with exit status: 1
> 
> See the libtool manual (
> http://www.gnu.org/software/libtool/manual/html_node/LT_005fINIT.html
> ):
> AC_PROG_LIBTOOL and AM_PROG_LIBTOOL are deprecated names for older
> versions of this macro; autoupdate will upgrade your configure.ac
> files.
> 
> It appears that automake's message is out of date.
>
I agree with Jack that advertising the use of LT_INIT would be better,
since, according to Libtool NEWS file, that has obsoleted AC_PROG_LIBTOOL
since version 1.9b (2004-08-29).

What about the attached patch (for maint)?

Regards,
   Stefano