bitbake variable override (virtual/kernel)

bitbake variable override (virtual/kernel)

[Prasant J]

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Hi,

I'm putting together my custom layer with my machine configuration. I have
set PREFERRED_PROVIDER_virtual/kernel to build my kernel but it is always
overridden by distro configuration. Below is the output of bitbake
environment:


# $PREFERRED_PROVIDER_virtual/kernel [6 operations]
#   set
/home/user/fsl-L3.14.52_1.1.0_ga/fsl-release-bsp/sources/meta-fsl-arm/conf/machine/include/imx-base.inc:117
#     [_defaultval] "linux-imx"
#   finalize ast.py:325 [finalize]
#     "was: linux-imx"
#   override[mx6]:set
/home/user/fsl-L3.14.52_1.1.0_ga/fsl-release-bsp/build-fb/conf/local.conf:26
#     "linux-myboard-imx6"
#   override[mx6]:set
/home/user/fsl-L3.14.52_1.1.0_ga/fsl-release-bsp/sources/mylayer/meta-newlayer/conf/machine/mymachine.conf:17
#     "linux-myboard-imx6"
#   override[mx6]:set
/home/user/fsl-L3.14.52_1.1.0_ga/fsl-release-bsp/sources/meta-fsl-bsp-release/imx/meta-sdk/conf/distro/include/fsl-imx-preferred-env.inc:7
#     "linux-imx"
#   finalize override[mx6]:
#     "linux-imx"
# pre-expansion value:
#   "linux-imx"
PREFERRED_PROVIDER_virtual/kernel="linux-imx"



From the above it seems that distro configuration overrides my custom
machine + glocal conf/local.conf configuration.


Is it expected? So should I also create a custom DISTRO?
Is there a way to extend the DISTRO configuration and only override
virtual/kernel value?


Any input will be of help to me. Thanks!


Regards

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Re: bitbake variable override (virtual/kernel)

[Richard Purdie]

On Mon, 2015-12-28 at 18:52 +0530, Prasant J wrote:
> Hi,
> 
> I'm putting together my custom layer with my machine configuration. I
> have set PREFERRED_PROVIDER_virtual/kernel to build my kernel but it
> is always overridden by distro configuration. Below is the output of
> bitbake environment:
> 
> 
> # $PREFERRED_PROVIDER_virtual/kernel [6 operations]
> #   set /home/user/fsl-L3.14.52_1.1.0_ga/fsl-release-bsp/sources/meta
> -fsl-arm/conf/machine/include/imx-base.inc:117
> #     [_defaultval] "linux-imx"
> #   finalize ast.py:325 [finalize]
> #     "was: linux-imx"
> #   override[mx6]:set /home/user/fsl-L3.14.52_1.1.0_ga/fsl-release
> -bsp/build-fb/conf/local.conf:26
> #     "linux-myboard-imx6"
> #   override[mx6]:set /home/user/fsl-L3.14.52_1.1.0_ga/fsl-release
> -bsp/sources/mylayer/meta-newlayer/conf/machine/mymachine.conf:17
> #     "linux-myboard-imx6"
> #   override[mx6]:set /home/user/fsl-L3.14.52_1.1.0_ga/fsl-release
> -bsp/sources/meta-fsl-bsp-release/imx/meta
> -sdk/conf/distro/include/fsl-imx-preferred-env.inc:7
> #     "linux-imx"
> #   finalize override[mx6]:
> #     "linux-imx"
> # pre-expansion value:
> #   "linux-imx"
> PREFERRED_PROVIDER_virtual/kernel="linux-imx"
> 
> From the above it seems that distro configuration overrides my custom
> machine + glocal conf/local.conf configuration.
> 
> 
> Is it expected? So should I also create a custom DISTRO?
> Is there a way to extend the DISTRO configuration and only override
> virtual/kernel value?
> 
> 
> Any input will be of help to me. Thanks!

Distro overrides are more powerful so yes, this isn't surprising. You
could disable the mx6 override (which is probably added to
MACHINEOVERRIDES or DISTROOVERRIDES)?

Something like:

MACHINEOVERRIDES_remove = ":mx6"

might even work.

Cheers,

Richard

Re: bitbake variable override (virtual/kernel)

[Prasant J]

On Mon, Dec 28, 2015 at 6:58 PM, Richard Purdie
<richard.purdie@linuxfoundation.org> wrote:
> On Mon, 2015-12-28 at 18:52 +0530, Prasant J wrote:
>> Hi,
>>
>> I'm putting together my custom layer with my machine configuration. I
>> have set PREFERRED_PROVIDER_virtual/kernel to build my kernel but it
>> is always overridden by distro configuration. Below is the output of
>> bitbake environment:
>>
>>
>> # $PREFERRED_PROVIDER_virtual/kernel [6 operations]
>> #   set /home/user/fsl-L3.14.52_1.1.0_ga/fsl-release-bsp/sources/meta
>> -fsl-arm/conf/machine/include/imx-base.inc:117
>> #     [_defaultval] "linux-imx"
>> #   finalize ast.py:325 [finalize]
>> #     "was: linux-imx"
>> #   override[mx6]:set /home/user/fsl-L3.14.52_1.1.0_ga/fsl-release
>> -bsp/build-fb/conf/local.conf:26
>> #     "linux-myboard-imx6"
>> #   override[mx6]:set /home/user/fsl-L3.14.52_1.1.0_ga/fsl-release
>> -bsp/sources/mylayer/meta-newlayer/conf/machine/mymachine.conf:17
>> #     "linux-myboard-imx6"
>> #   override[mx6]:set /home/user/fsl-L3.14.52_1.1.0_ga/fsl-release
>> -bsp/sources/meta-fsl-bsp-release/imx/meta
>> -sdk/conf/distro/include/fsl-imx-preferred-env.inc:7
>> #     "linux-imx"
>> #   finalize override[mx6]:
>> #     "linux-imx"
>> # pre-expansion value:
>> #   "linux-imx"
>> PREFERRED_PROVIDER_virtual/kernel="linux-imx"
>>
>> From the above it seems that distro configuration overrides my custom
>> machine + glocal conf/local.conf configuration.
>>
>>
>> Is it expected? So should I also create a custom DISTRO?
>> Is there a way to extend the DISTRO configuration and only override
>> virtual/kernel value?
>>
>>
>> Any input will be of help to me. Thanks!
>
> Distro overrides are more powerful so yes, this isn't surprising. You
> could disable the mx6 override (which is probably added to
> MACHINEOVERRIDES or DISTROOVERRIDES)?
>
> Something like:
>
> MACHINEOVERRIDES_remove = ":mx6"
>
> might even work.
>

Thanks for inputs!

I'm also building for imx6. Removing override may remove many other
settings that I do not want to change.

Is it possible to extend DISTRO configuration and change
PREFERRED_PROVIDER_virtual/kernel in the  extended configuration?

Regards, PJ

Re: bitbake variable override (virtual/kernel)

[Richard Purdie]

On Mon, 2015-12-28 at 20:54 +0530, Prasant J wrote:
> On Mon, Dec 28, 2015 at 6:58 PM, Richard Purdie
> <richard.purdie@linuxfoundation.org> wrote:

> Thanks for inputs!
> 
> I'm also building for imx6. Removing override may remove many other
> settings that I do not want to change.
> 
> Is it possible to extend DISTRO configuration and change
> PREFERRED_PROVIDER_virtual/kernel in the  extended configuration?

Its possible but I don't think it will do what you need. You really
need an override stronger than imx6. To be honest, I'm not sure this
"distro" include should be defining these as such strong overrides, its
really a machine setting, not a distro setting.

Anyhow, you could define your own override in MACHINEOVERRIDES or
DISTROOVERIDES which would be defined at a higher priority that the
imx6 one, then set

PREFERRED_PROVIDER_virtual/kernel_<OVERRIDE> = "x"

MACHINE is an override, so you could try that in there too:

PREFERRED_PROVIDER_virtual/kernel_<MACHINE> = "x"

Cheers,

Richard