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

Dave Airlie airlied at gmail.com
Tue Oct 2 22:48:34 PDT 2012

On Wed, Oct 3, 2012 at 3:45 PM, Dave Airlie <airlied at gmail.com> wrote:
> 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.

Except you brought it back in a rebase or mismerge:

build: Use AX_PTHREAD to detect pthreads

Fail pick or rebase.


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