Re: Fixing configure with Autoconf 2.64

[Patrick McCarty]

On Thu, Aug 06, 2009 at 06:22:05PM +0200, John Mandereau wrote:
> Le mercredi 05 août 2009 à 21:03 -0700, Patrick McCarty a écrit :
> > I need this patch to run ./autogen.sh with the latest Autoconf version
> > (2.64).  The only earlier version I am able to test is 2.63, which
> > works fine with the patch.
> > 
> > The warnings I am seeing and workarounds are here:
> > 
> > http://www.gnu.org/software/hello/manual/autoconf/Expanded-Before-Required.html
> > 
> > Okay to apply? (or is there a better fix?)
> 
> Shouldn't AC_PROG_CC be AC_PROG_CXX? :-)

That's actually a good point.  But since we've always used AC_PROG_CC,
and there haven't been any reports of this not working, I think we
should just keep using the same macro.

> Other than this it works for me.  I'm not an expert with autoconf, so I'
> don't know about possible better fixes.

After looking into this some more, I think this fix is perfectly safe
for any Autoconf version.  Autoconf 2.64 catches cases of incorrect
macro nesting, so expanding AC_PROG_CC before stepmake is initialized
should be all that's needed.

I'll push.

Thanks,
Patrick