Re: [OE-core] [PATCH 1/2] libubootenv: add rrecommends from libubootenv to u-boot-env

["Antonin Godard" <antonin.godard@bootlin.com>]

On Mon Jun 23, 2025 at 10:17 AM CEST, Antonin Godard wrote:
> On Mon Jun 23, 2025 at 9:35 AM CEST, Adrian Freihofer via lists.openembedded.org wrote:
>> From: Adrian Freihofer <adrian.freihofer@siemens.com>
>>
>> Without /etc/fw_env.config, the fw_printenv and fw_setenv utilities fail
>> with an error, as they cannot locate the U-Boot environment.
>> This limitation also affects any application linking against
>> libubootenv. To address this, add an RRECOMMENDS from libubootenv to the
>> u-boot-env package, which provides the necessary configuration files.
>>
>> While this could be an RDEPENDS, using RRECOMMENDS allows users with
>> custom implementations to more easily override the dependency if needed.
>>
>> Some examples suggest bbappending fw_env.config directly to the
>> libubootenv recipe. However, /etc/fw_env.config is machine-specific,
>> whereas libubootenv is not. Additionally, the default U-Boot
>> environment, which can be used by libubootenv, is also provided by the
>> machine-specific u-boot-env package. Therefore, it is preferable to
>> provide fw_env.config via the machine-specific u-boot recipe.
>>
>> Signed-off-by: Adrian Freihofer <adrian.freihofer@siemens.com>
>> ---
>>  meta/recipes-bsp/u-boot/libubootenv_0.3.6.bb | 4 ++++
>>  1 file changed, 4 insertions(+)
>>
>> diff --git a/meta/recipes-bsp/u-boot/libubootenv_0.3.6.bb b/meta/recipes-bsp/u-boot/libubootenv_0.3.6.bb
>> index 35678e2361f..a193872b83b 100644
>> --- a/meta/recipes-bsp/u-boot/libubootenv_0.3.6.bb
>> +++ b/meta/recipes-bsp/u-boot/libubootenv_0.3.6.bb
>> @@ -21,4 +21,8 @@ DEPENDS = "zlib libyaml"
>>  PROVIDES += "u-boot-fw-utils"
>>  RPROVIDES:${PN}-bin += "u-boot-fw-utils"
>>  
>> +# libubootenv needs /etc/fw_env.config and /etc/u-boot-initial-env configuration
>> +# files which are usually provided by the MACHINE specific u-boot-env package
>> +RRECOMMENDS:${PN} += "u-boot-env"
>> +
>>  BBCLASSEXTEND = "native"
>
> Hi,
>
> I think this patch produces the following warnings:
>
> stdio: WARNING: Nothing RPROVIDES 'u-boot-env-native' (but virtual:native:/srv/pokybuild/yocto-worker/a-full/build/meta/recipes-bsp/u-boot/libubootenv_0.3.6.bb RDEPENDS on or otherwise requires it)
> stdio: WARNING: Nothing RPROVIDES 'libubootenv-native' (but virtual:native:/srv/pokybuild/yocto-worker/a-full/build/meta/recipes-bsp/u-boot/libubootenv_0.3.6.bb RDEPENDS on or otherwise requires it)
> stdio: WARNING: Nothing RPROVIDES 'libubootenv-dev-native' (but virtual:native:/srv/pokybuild/yocto-worker/a-full/build/meta/recipes-bsp/u-boot/libubootenv_0.3.6.bb RDEPENDS on or otherwise requires it)
>
> Happens on `bitbake universe -c fetch -k`.
>
> Can you have a look?
>
> Full log:
> https://autobuilder.yoctoproject.org/valkyrie/api/v2/logs/2765656/raw_inline

Also triggers the following errors I believe:

ERROR: Nothing RPROVIDES 'lib32-u-boot-env' (but virtual:multilib:lib32:/srv/pokybuild/yocto-worker/qemux86-world-alt/build/meta/recipes-bsp/u-boot/libubootenv_0.3.6.bb RDEPENDS on or otherwise requires it)
u-boot RPROVIDES lib32-u-boot-env but was skipped: PREFERRED_PROVIDER_virtual/lib32-bootloader set to lib32-u-boot, not u-boot
NOTE: Runtime target 'lib32-u-boot-env' is unbuildable, removing...
Missing or unbuildable dependency chain was: ['lib32-u-boot-env']
ERROR: Nothing RPROVIDES 'lib32-libubootenv-dev' (but virtual:multilib:lib32:/srv/pokybuild/yocto-worker/qemux86-world-alt/build/meta/recipes-bsp/u-boot/libubootenv_0.3.6.bb RDEPENDS on or otherwise requires it)
No eligible RPROVIDERs exist for 'lib32-libubootenv-dev'
NOTE: Runtime target 'lib32-libubootenv-dev' is unbuildable, removing...
Missing or unbuildable dependency chain was: ['lib32-libubootenv-dev']
ERROR: Nothing RPROVIDES 'lib32-libubootenv' (but virtual:multilib:lib32:/srv/pokybuild/yocto-worker/qemux86-world-alt/build/meta/recipes-bsp/u-boot/libubootenv_0.3.6.bb RDEPENDS on or otherwise requires it)
No eligible RPROVIDERs exist for 'lib32-libubootenv'
NOTE: Runtime target 'lib32-libubootenv' is unbuildable, removing...
Missing or unbuildable dependency chain was: ['lib32-libubootenv']
ERROR: Nothing RPROVIDES 'u-boot-env' (but /srv/pokybuild/yocto-worker/qemux86-world-alt/build/meta/recipes-bsp/u-boot/libubootenv_0.3.6.bb RDEPENDS on or otherwise requires it)
u-boot RPROVIDES u-boot-env but was skipped: We shouldn't have multilib variants for u-boot
u-boot RPROVIDES u-boot-env but was skipped: PREFERRED_PROVIDER_virtual/lib32-bootloader set to lib32-u-boot, not u-boot
NOTE: Runtime target 'u-boot-env' is unbuildable, removing...
Missing or unbuildable dependency chain was: ['u-boot-env']
ERROR: Nothing RPROVIDES 'libubootenv' (but /srv/pokybuild/yocto-worker/qemux86-world-alt/build/meta/recipes-bsp/u-boot/libubootenv_0.3.6.bb RDEPENDS on or otherwise requires it)
No eligible RPROVIDERs exist for 'libubootenv'
NOTE: Runtime target 'libubootenv' is unbuildable, removing...
Missing or unbuildable dependency chain was: ['libubootenv']
ERROR: Nothing RPROVIDES 'libubootenv-dev' (but /srv/pokybuild/yocto-worker/qemux86-world-alt/build/meta/recipes-bsp/u-boot/libubootenv_0.3.6.bb RDEPENDS on or otherwise requires it)
No eligible RPROVIDERs exist for 'libubootenv-dev'
NOTE: Runtime target 'libubootenv-dev' is unbuildable, removing...
Missing or unbuildable dependency chain was: ['libubootenv-dev']

https://autobuilder.yoctoproject.org/valkyrie/#/builders/17/builds/1742

Antonin

-- 
Antonin Godard, Bootlin
Embedded Linux and Kernel engineering
https://bootlin.com