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Date: Thu, 21 Jan 2010 16:53:57 +0000
From: Jamie Lokier <jamie@shareable.org>
Subject: Re: [Qemu-devel] Re: Stop using "which" in ./configure
Message-ID: <20100121165357.GA26539@shareable.org>
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To: =?iso-8859-1?Q?M=E5ns_Rullg=E5rd?= <mans@mansr.com>
Cc: qemu-devel@nongnu.org

Måns Rullgård wrote:
>   If IFS is not set, the shell shall behave as if the value of IFS is
>   <space>, <tab>, and <newline>
> 
> If you make that IFS=${local_ifs:-$(printf ' \t\n')} it should be safe.
> Likewise if you set the value first.

Remove the colon.  The above will wrongly change empty IFS, which
is not the same as unset IFS.

That said, nobody should expect ./configure to work if IFS has an
unusual value anyway.  Probably .configure should just set it to the
standard value at the start.

-- Jamie