Re: [PATCH] linux-custom: Generate cross linux-libc-dev package

["'Jan Kiszka' via isar-users" <isar-users@googlegroups.com>]

On 10.09.25 15:23, 'Jan Kiszka' via isar-users wrote:
> On 30.08.23 06:50, Uladzimir Bely wrote:
>> In addition to `linux-libc-dev`, install cross-variant of this package
>> when "cross" debian profile is enabled.
>>
>> This should allow to cross-compile packages depending on custom
>> kernel headers with different version than in debian packages.
>> Typical case - building bookworm system (with linuix-libc-dev-6.1.*)
>> against custom kernel with a lower version (e.g., 5.4).
>>
>> With this patch, when such a package is built, debian-provided package
>> `linux-libc-dev-<ARCH>-cross` will have an alternative package provided
>> by custom linux recipe so that sbuild could replace (downgrade) it.
>>
>> Signed-off-by: Uladzimir Bely <ubely@ilbers.de>
>> ---
>>  meta/recipes-kernel/linux/files/debian/control.tmpl   | 11 +++++++++++
>>  .../linux/files/debian/isar/common.tmpl               |  2 ++
>>  .../linux/files/debian/isar/install.tmpl              |  3 +++
>>  3 files changed, 16 insertions(+)
>>
>> diff --git a/meta/recipes-kernel/linux/files/debian/control.tmpl b/meta/recipes-kernel/linux/files/debian/control.tmpl
>> index dd0b6245..956db3e3 100644
>> --- a/meta/recipes-kernel/linux/files/debian/control.tmpl
>> +++ b/meta/recipes-kernel/linux/files/debian/control.tmpl
>> @@ -29,6 +29,17 @@ Description: Linux support headers for userspace development
>>   This package provides userspaces headers from the Linux kernel.  These headers
>>   are used by the installed headers for GNU glibc and other system libraries.
>>  
>> +Package: linux-libc-dev-${DISTRO_ARCH}-cross
>> +Build-Profiles: <!nolibcdev cross>
>> +Section: devel
>> +Provides: linux-kernel-headers-${DISTRO_ARCH}-cross
>> +Architecture: all
>> +Description: Linux Kernel Headers for development (for cross-compiling)
>> + This package provides headers from the Linux kernel.  These headers
>> + are used by the installed headers for GNU glibc and other system
>> + libraries. They are NOT meant to be used to build third-party modules for
>> + your kernel. Use linux-headers-* packages for that.
>> +
> 
> No idea why this was missed, but when you actually need the package like
> I do now, it's quickly clear what all went wrong here. Fix is being
> tested...

False alarm here.

Turned out that this change is not to blame for breakages I see, rather
only "linux-custom: support to add linux-libc-dev package with kernel
name". That other patch forgot to add a "Provides:
linux-libc-dev-${DISTRO_ARCH}-cross" while renaming the generated package.

Jan

-- 
Siemens AG, Foundational Technologies
Linux Expert Center

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