Subject: Re: [PATCH] printk: Remove no longer used second struct cont

From: Joe Perches <[email-masked]>
Date: Thu, 15 Dec 2016 22:04:25 -0800

On Thu, 2016-12-15 at 21:00 -0800, Junio C Hamano wrote:
> Joe Perches <[email-masked]> writes:
> 
> > grep 2.5.4 was the last version that supported the -P option to
> > grep through for multiple lines.
> 
> Does anybody know why it was dropped?

perl compatible regexes in grep have always been "experimental"
and never officially supported.

>From the grep manual https://www.gnu.org/software/grep/manual/grep.html

    --perl-regexp

        Interpret the pattern as a Perl-compatible regular expression
    (PCRE). This is highly experimental, particularly when combined with
    the -z (--null-data) option, and ‘grep -P’ may warn of unimplemented
    features. See Other Options.

It wasn't dropped so much as "enhanced" away.

Oh well.