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From:	Eric Blake <ebb9 AT byu DOT net>
Subject:	Re: [1.7] flock change breaks autotools 'make -j2'
Date:	Mon, 20 Apr 2009 15:14:49 +0000 (UTC)
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Corinna Vinschen <corinna-cygwin <at> cygwin.com> writes:

> > > I'd prefer a testcase in C.
> > 
> > So would I.  I'm not even sure whether perl was using flock or
> > lockf/fcntl.  Do you still need me to try and write a STC, or at least
> > test how perl behaves with your first patch?
> 
> I checked in a patch which hopefully solves both problems.  The lock.pl
> testcase now works, at least.  Can you test if the original scenario
> works now as well?  If not, I'd really need another testcase.

Nope; with snapshot 20090418 I'm still seeing the 'make -j2' failures.  I'll 
see if I can come up with a C program that can be run as two processes to 
simulate the failure as a simpler test case.  I did verify via strace that perl 
is using flock(fd, LOCK_EX).

-- 
Eric Blake




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