Re: require M4 1.4.5 or later

[Ralf Wildenhues]

Hi Eric,

* Eric Blake wrote on Fri, Feb 02, 2007 at 12:59:53AM CET:
> Is this patch acceptable?

FWIW, it looks good to me, thanks.  Tiny nits:

> +** Autoconf now has a hard dependency on GNU M4 1.4.5 or later.

I think "Autoconf now requires GNU M4 1.4.5 or later." is sufficient.

> +dnl Creative quoting here to avoid raw dnl in configure

s/raw dnl/& and ifdef/

> +if test x"$M4" != x \
> +    && test -z "`echo if'def(mac,bug)d'nl | $M4 --trace=mac 2>&1`" ; then
> +  ac_cv_prog_gnu_m4=yes

Cheers,
Ralf