Re: [OE-core] [PATCH] u-boot: Fix u-boot-tools-native build after DTC update

[Joao Marcos Costa <joaomarcos.costa@bootlin.com>]

Hello,

On 4/29/26 10:03, Richard Purdie via lists.openembedded.org wrote:
> On Tue, 2026-04-28 at 21:18 -0300, Fabio Estevam via lists.openembedded.org wrote:
>> From: Marek Vasut <marek.vasut@mailbox.org>
>>
>> Set PKG_CONFIG_SYSROOT_DIR as invalid path, so the host tools
>> build will surely not find host /usr/include/yaml.h file and
>> will disable yamltree build. For details, see U-Boot commit
>> 807bcd844afe ("scripts/dtc: Fix pkg-config behavior under sysroot").
>>
>> Signed-off-by: Marek Vasut <marek.vasut@mailbox.org>
>> Signed-off-by: Fabio Estevam <festevam@gmail.com>
(...)
>>   
>> +# Set PKG_CONFIG_SYSROOT_DIR as invalid path, so the host tools
>> +# build will surely not find host /usr/include/yaml.h file and
>> +# will disable yamltree build. For details, see U-Boot commit
>> +# 807bcd844afe ("scripts/dtc: Fix pkg-config behavior under sysroot")
>> +PKG_CONFIG_SYSROOT_DIR:prepend = "/invalid/"
> 
> This feels a bit like a hack. Is there not a config option we can pass
> to u-boot to make this deterministic, i.e. always disable libyaml?
> 
> Cheers,
> 
> Richard

Maybe setting/appending "-DNO_YAML" at HOST_EXTRACFLAGS (e.g., through 
EXTRA_OEMAKE or BUILD_CFLAGS)?

In the end, that's a direct consequence of having an invalid 
PKG_CONFIG_SYSROOT_DIR:
https://github.com/u-boot/u-boot/blob/master/scripts/dtc/Makefile#L21

It is still kind of a hack, though, but I hope it helps!

-- 
Best regards,
João Marcos Costa