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Message-ID: <1469793389.9142.59.camel@linuxfoundation.org>
From: Richard Purdie <richard.purdie@linuxfoundation.org>
To: "Maxin B. John" <maxin.john@intel.com>,
	bitbake-devel@lists.openembedded.org
Date: Fri, 29 Jul 2016 12:56:29 +0100
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References: <1469780615-1657-1-git-send-email-maxin.john@intel.com>
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Subject: Re: [RFC][PATCH] bitbake: fetch2: fix warning while switching from master to krogoth
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On Fri, 2016-07-29 at 11:23 +0300, Maxin B. John wrote:
> While switching from master to krogoth build with a common download
> directory,
> got a large number of warnings like the one listed below:
> 
> WARNING: freetype-2.6.3-r0 do_fetch: Couldn't load checksums from
> donestamp /home/maxin/downloads/freetype-2.6.3.tar.bz2.done:
> ValueError
> (msg: unsupported pickle protocol: 4)
> 
> These warnings are caused by the difference in pickle module
> implementation in python3(master) and python2(krogoth). Python2
> supports
> 3 different protocols (0, 1, 2) and pickle.HIGHEST_PROTOCOL is 2
> where as
> Python3 supports 5 different protocols (0, 1, 2, 3, 4) and
> pickle.HIGHEST_PROTOCOL is obviously 4.
> 
> My suggestion is to use 2 since it is backward compatible with
> python2
> (all the supported distros for krogoth provides python2 which
> supports
> pickle protocol version 2)

This looks good to me, well spotted. I've merged it since the
autobuilder is likely spending a lot of time churning sources around at
the moment due to this.

Ideally we'd use a better data format in these files so I'd welcome
other improvements but this fixes the immediate problem.

Cheers,

Richard