bug#7642: Build failure on NetBSD 5.0.2 on IA-32

[Chong Yidong]

Glenn Morris <rgm@gnu.org> writes:

> Chong Yidong wrote:
>
>> Nelson H. F. Beebe reports a build failure for the 23.2.91 pretest on
>> NetBSD 5.0.2 on IA-32.  The last Emacs version to build ok was 23.1.96
>> in April 2010:
>>
>>> On NetBSD, the configure step with both native /usr/bin/cc and
>>> gcc-4.4-20090123 fails like this:
>>>
>>> ...
>>> checking whether `alloca.c' needs Cray hooks... no
>>> checking stack direction for C alloca... -1
>>> configure: error: a system implementation of alloca is required
>
> The relevant part of the output is missing, but it looks like the
> system does not have an implementation of alloca. Support for systems
> without alloca was removed in 23.1. Does 23.1 currently build on that
> system? What does the rest of configure's output look like?

Nelson, could you post the rest of the entire configure log?  Thanks.

Surely NetBSD on IA-32 should have an alloca implementation; this is
strange.