Re: Aclocal bug?

[Eric Blake-1]

> 
> > I think that Autoconf should require m4 >= 1.4.5.
> >
> > (Autoconf's confgiure should check for it; should it be done in
> > m4/m4.m4 in AM_PROG_GNU_M4, or in configure.ac?)
> 
> I agree.  Both when building and installing the tools from source,
> autoconf's configure should complain if the installed m4 is not new
> enough; and also when bootstrapping Autoconf itself, a diagnostic for
> too old a GNU M4 should given when necessary.

For that matter, a configure.ac that contains:

m4_indir([AM_GNU_GETTEXT_INTL_SUBDIR])

can trigger a coredump in m4 1.4.4 or earlier with CVS
autoconf.

However, m4 1.4.5 only came out this summer, and it
seems a bit scary to make autoconf 2.61 depend on something
that is not at least a year old.  But it is worth serious thought
to having autoconf 2.61 require newer m4, since we have shown
that otherwise, a common usage pattern of gettext is broken.
Making this dependency will likely force Apple and others to
upgrade their provided m4 at the same time they upgrade to
autoconf 2.61.

-- 
Eric Blake

-- 
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