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Date: Wed, 11 Sep 2013 17:31:00 +0800
From: Robert Yang <liezhi.yang@windriver.com>
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To: Richard Purdie <richard.purdie@linuxfoundation.org>
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Cc: openembedded-core <openembedded-core@lists.openembedded.org>
Subject: Re: [RFC PATCH] bitbake.conf: Stop providing ${P} and ${PF} by default
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On 09/10/2013 10:08 PM, Richard Purdie wrote:
> On Tue, 2013-09-10 at 15:33 +0800, Robert Yang wrote:
>> Thanks, Can we provide a replacement for the "bitbake PN-PV" since it is
>> useful, for example, can we support the PREFERRED_VERSION_${PN} in the env
>> in the future ? There is a similar bug:
>>
>> https://bugzilla.yoctoproject.org/show_bug.cgi?id=4965
>
> If you set BB_PRESERVE_ENV=1 you can set PREFERRED_VERSION_xxx from the
> environment so this should already be possible?
>

It seems that the BB_PRESERVE_ENV=1 doesn't work, but we use the
BB_ENV_EXTRAWHITE, for example:

$ export BB_ENV_EXTRAWHITE="$BB_ENV_EXTRAWHITE PREFERRED_VERSION_make"
$ export PREFERRED_VERSION_make="3.81",

Then it works, maybe something is wrong with the BB_PRESERVE_ENV.

// Robert

> Cheers,
>
> Richard
>
>
>