Re: fix the AC_USE_SYSTEM_EXTENSIONS regression.

[Ralf Wildenhues]

* Eric Blake wrote on Mon, Aug 04, 2008 at 02:59:45PM CEST:
> According to Ralf Wildenhues on 7/31/2008 4:32 PM:
> | OK to simply revert
> |
> | commit 6add6e92a6136865763edddb9946a8d2469153bb
> | Author: Eric Blake <address@hidden>
> | Date:   Tue Sep 11 17:13:13 2007 +0000
> |
> |     Centralize all system extensions checks.
>
> Unfortunately, now that 2.62 has been released, there are packages that
> are relying on the new combined semantics (pretty much anything
> gnulib-based),

What code expects AC_AIX to expand all of AC_USE_SYSTEM_EXTENSIONS?
And if not that, what is it exactly that the gnulib code expects?

> as well as packages that aren't expecting the combined
> semantics (witness all the bug reports).  I don't think straight reversion
> is an option because it would impact a different set of packages;

Agreed; I didn't know about the gnulib requirements.

Thanks,
Ralf