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Re: [Xen-devel] [PATCH] xen/Makefile: use CC --version instead of -v

  • To: Robert Buchholz <rbu@xxxxxxxxxx>, <xen-devel@xxxxxxxxxxxxxxxxxxx>
  • From: Keir Fraser <keir.fraser@xxxxxxxxxxxxx>
  • Date: Wed, 27 Aug 2008 12:00:31 +0100
  • Cc:
  • Delivery-date: Wed, 27 Aug 2008 04:01:03 -0700
  • List-id: Xen developer discussion <xen-devel.lists.xensource.com>
  • Thread-index: AckIMGozqQkfbHQjEd2YpwAX8io7RQAA7TqQ
  • Thread-topic: [Xen-devel] [PATCH] xen/Makefile: use CC --version instead of -v

On 27/8/08 11:33, "Keir Fraser" <keir.fraser@xxxxxxxxxxxxx> wrote:

> On 27/8/08 11:12, "Robert Buchholz" <rbu@xxxxxxxxxx> wrote:
>> Btw, what is the reason for ".*" in the first place?
> Lost somewhat in the mists of time, but I think some vendor packages
> (possibly Red Hat iirc) stuck something in between 'gcc' and 'version'.
> Another tactic might be 'tail -n1'. I can't remember if the version is
> always the last line of 'gcc -v' output though.
> Hmmm... actually that is what Linux does (tail -n 1). So let's go with that.

I've checked in 'tail -1' which I think is more portable. If that is
agreeable to everyone then I'll backport to 3.3 and 3.2 branches.

 -- Keir

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