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Date: Wed, 19 Aug 2009 11:43:10 -0600
From: Eric Blake <ebb9 AT byu DOT net>
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To: cygwin AT cygwin DOT com
Subject: Re: Updated: autoconf2.5-2.64-1
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According to Charles Wilson on 8/19/2009 10:53 AM:
> Failed test was:
> 176: parallel test execution       FAILED (autotest.at:1118)
> Internal error was "broken pipe".
> 
> Furthermore, several of the other parallel tests succeeded, but only
> because I manually killed them once they entered infloops or hung
> states.  However, the parallel tests do not represent regressions,
> as autoconf-2.63 did not support parallel autotest execution.  Note
> that the autoconf-2.64 release for cygwin-1.7, autoconf2.5-2.64-10,
> does not share these issues with most of the parallel tests (although
> it, too, fails test 176 specifically).

And failure on this test is already known to be a cygwin1.dll deficiency,
by both the autoconf team and by cgf (who has made progress on improving
pipes for 1.7, but is certainly facing a tough nut to crack).
Fortunately, the workaround is simple (albeit a bit more time-consuming) -
for testsuites created by autoconf, don't try running them in parallel on
cygwin (at least bison, tar, and m4 create testsuites via autoconf) until
pipe handling is improved.

- --
Don't work too hard, make some time for fun as well!

Eric Blake             ebb9 AT byu DOT net
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