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

[Qiang Yu]

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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