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Date: Wed, 20 Jan 2010 14:49:40 +0100
From: =?iso-8859-1?Q?Lo=EFc?= Minier <lool@dooz.org>
Subject: Re: [Qemu-devel] Re: Stop using "which" in ./configure
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To: qemu-devel@nongnu.org

On Wed, Jan 20, 2010, Paolo Bonzini wrote:
> On 01/20/2010 12:37 PM, Lo=EFc Minier wrote:
> >+    # not found
> >+    IFS=3D"$local_ifs"
> If you do this, you should set IFS to space-tab-lf at the beginning of=20
> the script, like this:
>=20
> IFS=3D" ""	""
> "

 Are you saying that I can't backup/restore IFS without setting it
 first?  That would be odd; it works with bash, dash, and zsh here.
 Pointers to affected shell would help me avoid other issues with them.

 Alternatively, I could set IFS in a subshell.

 I checked the autoconf Portable Shell Programming section, but didn't
 find a similar recommendation:
   http://www.gnu.org/software/autoconf/manual/autoconf.html#index-IFS-16=
39

> or this (better because it does not rely on embedding whitespace=20
> characters within the line):
> IFS=3D`printf ' \t'`"
> "

 If we go that route, perhaps IFS=3D"`printf ' \t\n'`" would be more
 readable?  I'm not sure how common printf is though.

--=20
Lo=EFc Minier