[yocto] When to create a new build directory for yocto?

[Qiang Yu]

Hi Chen Qi,

Thanks for your suggestion.

I mean the tmp/deploy/ipk dir will have one copy each build dir. And two
boards of the same SOC will
share most of them, so the disk space of the tmp/deploy/ipk part is wasted.

Regards,
Qiang


On Mon, Dec 1, 2014 at 10:01 AM, ChenQi <Qi.Chen at windriver.com> wrote:

>  Sharing sstate is safe and efficient.
> sstate does not contain any package.
>
> Regards,
> Chen Qi
>
>
> On 11/30/2014 10:28 PM, Qiang Yu wrote:
>
> Why share the sstate? Does it contain previously build ipk packages in
> other build directories for reuse?
>
>  Regards,
> Qiang
>
> On Sun, Nov 30, 2014 at 4:03 PM, ChenQi <Qi.Chen at windriver.com> wrote:
>
>>  I would suggest to use separate build directories but let these builds
>> to share downloads and sstate.
>>
>> Regards,
>> Chen Qi
>>
>>
>> On 11/30/2014 12:49 PM, Qiang Yu wrote:
>>
>> Hi all,
>>
>> I'm maintaining a Yocto build system to produce these outputs:
>>
>> 1. ARM SOC 1
>>   1). board 1 image
>>   2). board 2 image
>>   3). SDK for i686
>>   4). SDK for x86_64
>> 2. ARM SOC 2
>>   1). board 3 image
>>   2). board 4 image
>>   3). SDK for i686
>>   4). SDK for x86_64
>>
>> Now I don't know the right way to create build directories for these
>> builds. The simplest way
>> I think is creating one build directory for each of these builds. But it
>> wast resource for boards
>> with the same SOC which can share cross toolchain. And ARM SOC 1 and ARM
>> SOC 2 use
>> different conf/bblayers.conf to add different BSP layer, I need to modify
>> it when switch SOC.
>> So the right way is creating one build directory for each SOC, then
>> bitbake each output's recipe,
>> right?
>>
>> I am also not sure if I can put the SDK and board image in the same build
>> directory. Because
>> once I build a board's image after creating its SDK, I add gdbserver to
>> it, but the build fail without
>> really building the gdbserver package. So I guess the board image build
>> is confused by the SDK
>> build state.
>>
>>  So the conclusion is I need a recommended way to separate output into
>> different build directories:
>> 1. minimize rebuild shared packages
>> 2. no build state corruption
>> 3. if multi output in the same build dir, no change to conf/ files or an
>> easy way to switch between
>>
>>  Regards,
>> Qiang
>>
>>
>>
>>
>>
>> --
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>>
>>
>
>
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