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Re: Parallel make race in 5.1

From: Chet Ramey
Subject: Re: Parallel make race in 5.1
Date: Tue, 19 Jan 2021 16:02:59 -0500
User-agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:78.0) Gecko/20100101 Thunderbird/78.6.1

On 1/19/21 9:19 AM, Richard Purdie wrote:

In bash 5.1 we're seeing a parallel make race during build, as found a
couple of times in our automated CI for Yocto Project:

Thanks for the report. Interesting. I haven't seen this one either.

The issue is around pipesize.h which in 5.1 can be built by two
different triggers, builtins/ulimit.o or redir.o.

They can race against each other and rewrite files causing the above

I suppose that workaround will do, since it should only be built one time,
no matter how many times you run make.

``The lyf so short, the craft so long to lerne.'' - Chaucer
                 ``Ars longa, vita brevis'' - Hippocrates
Chet Ramey, UTech, CWRU    chet@case.edu    http://tiswww.cwru.edu/~chet/

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