RFR(xs): 8172712: configure should check that grep handles empty pattern correctly

[Thomas Stüfe]

Thank you!

On Thu, 12 Jan 2017 at 18:30, Mikael Vidstedt <mikael.vidstedt at oracle.com>
wrote:

>
> I also ran into this problem a couple of weeks ago with some other
> "misbehaving” grep. Thanks for adding this check!
>
> Cheers,
> Mikael
>
>
> On Jan 12, 2017, at 5:04 AM, Thomas Stüfe <thomas.stuefe at gmail.com> wrote:
>
> Dear all,
>
> please take a look at this fix. This should prevent configure from using a
> grep which is not able to handle pattern lists with empty patterns.
>
> Bug:
> https://bugs.openjdk.java.net/browse/JDK-8172712
>
> webrevs:
>
> http://cr.openjdk.java.net/~stuefe/webrevs/8172712-configure-should-check-that-grep-handles-empty-pattern-correctly/webrev.00/webrev/
>
> Background:
>
> https://bugs.openjdk.java.net/browse/JDK-8172579 was a build error caused
> by a buggy grep (on AIX) and the easiest way to work around that bug would
> be to use the GNU version of grep. It was suggested in the orginal mail
> thread (
> http://mail.openjdk.java.net/pipermail/build-dev/2017-January/018495.html)
> to check this in configure.
>
> This change implements this suggestion and checks if grep behaves
> correctly.
>
> Kind Regards, Thomas
>
>
>
>