Re: [gentoo-user] OT - grep: The -P option is not supported

[kashani <kashani-list@badapple.net>]

Michael Sullivan wrote:
> I have a script I wrote a couple of weeks ago.  Part of the script scans
> email files and returns IP addresses found in them.  I did this with
> this command:
> 
> cat * |  grep -Po "\[\d+\.\d+\.\d+\.\d+\]"
> 
> It worked fine right up until this afternoon.  Now I get this:
> 
> michael@bullet ~/spam $ cat * | grep -Po "\[\d+\.\d+\.\d+\.\d+\]"
> grep: The -P option is not supported
> michael@bullet ~/spam $

more /usr/portage/sys-apps/grep/ChangeLog

*grep-2.5.1a-r1 (01 Aug 2006)

   01 Aug 2006; Mike Frysinger <vapier@gentoo.org> +grep-2.5.1a-r1.ebuild:
   Add back in pcre #141609.

I suspect that's the issue, that your new grep is missing pcre, though 
it's hard to tell since you didn't mention which version of grep you 
have installed. Additionally pcre became a use flag in 2.5.1a-r1

kashani
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