[Patch]: fix bfd/targets.c build failure on AIX

[Dave Korn]

Kai Tietz wrote:
> 2009/11/17 Alan Modra <amodra@bigpond.net.au>:
>> On Tue, Nov 17, 2009 at 01:34:07PM +0100, Kai Tietz wrote:
>>> binutils-owner@sourceware.org wrote on 17.11.2009 13:20:11:
>>>> This is wrong.  alloca should not be used in libbfd, and where we
>>>> grudgingly accept it, alloca-conf.h needs to be the first include
>>>> file.
>>> just by curiousity. Where is written that alloca shouldn't be used in
>>> libbfd?
>> I don't think we document it anywhere, but see
>> http://sourceware.org/ml/binutils/2000-09/msg00367.html
>>
>> I'm inclined to think that bfd functions used only by ld are exempt
>> from Ian's rule that libraries ought not abort.
> 
> Well, main objections here is abort (), exit () AFAIU Ian's reply.

  But it also mentions that some platforms implement alloca using xmalloc,
which may abort.

    cheers,
      DaveK