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Re: ZILE 2.3.10 (Autoconf 2.64 finds deadly DJGPP Bash bug)

From: Ralf Wildenhues
Subject: Re: ZILE 2.3.10 (Autoconf 2.64 finds deadly DJGPP Bash bug)
Date: Sat, 22 Aug 2009 09:44:18 +0200
User-agent: Mutt/1.5.20 (2009-08-09)


* Eric Blake wrote on Fri, Aug 21, 2009 at 01:51:29AM CEST:
> Or does it require a more complex function body, to show the difference
> where the subshell avoids the crash?  At any rate, we'll need to
> characterize exactly what your shell's bug is.

Yes.  Rugxulo or Reuben, can you please post a link to the package
that's failing?  Thanks.

> However, the whole point of using 'return $ac_retval' without a subshell
> is to avoid forking, and catering to bash 2.04 brokenness (if it is indeed
> a bash bug fixed for 2.05a, as I suspect) is a step backwards.

We could use as_fn_set_status everywhere, and only define that to
use a subshell if we detect 2.05a.  That shouldn't penalize users of
non-broken shells so much.  (Of course, this is pretty vague given
that we don't know what exactly the bug is.)


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