[Mesa-dev] broken tinderbox - AC_CHECK_FUNC nested in AC_CHECK_DECLS for signbit

[Dave Airlie]

On Wed, Oct 3, 2012 at 3:29 PM, Matt Turner <mattst88 at gmail.com> wrote:
> On Tue, Oct 2, 2012 at 8:02 PM, Dave Airlie <airlied at gmail.com> wrote:
>> Hi guys,
>>
>> Tinderbox is red due to mesa failing to build, investigating seems to
>> be the signbit change.
>>
>> The nesting of the AC_CHECK_FUNC inside the AC_CHECK_DECLS seems to
>> defeat autoconf 2.63 that we ship in RHEL6.
>>
>> removing the nesting lets it configure here, but hopefully someone has
>> a nicer idea.
>>
>> Dave.
>
> Brian added a signbit macro in the case that it doesn't exist, and
> then removed the check:
> http://cgit.freedesktop.org/mesa/mesa/commit/?id=24a8e0c3da65019073f89cb7248916a692707db6
>
> So, problem solved.
>
> I don't know why the nesting wouldn't work though. I'm curious if
> putting brackets around AC_CHECK_FUNC(...) solves it?

yeah sticking [] around it fixes it alright, which makes sense if you
can speak autoelvish.

Dave.