Re: kernel: export native PKGCONFIG variables

Re: kernel: export native PKGCONFIG variables

[Christian Eggers]

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Hi Bruce,

on 2021-11-23, you added the following patch:

> 9172d61c57e23682c3d2c25701cbd53c84d01a27
>
> kernel: export native PKGCONFIG variables
>
> In a similar manner to cml1.bbclass, we export the pkg-config
> variables to allow a direct call to pkg-config access to the
> native sysroot versus the target sysroot.
>
> The kernel doesn't use pkg-config for target configuration,
I found some calls in the tools/ directory of the kernel.
Isn't this related to target configuration?

> and has many explicit calls to pkg-config, without the
> possibility of easy override to pkg-config-native.
I just noticed that this has recently changed:

https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=d5ea4fece4508bf8e72b659cd22fa4840d8d61e5

This change is in Linux 6.0, but not in 5.15. Probably it
could be backported easily.

>
> The calls to pkg-config could be made cross friendly via
> replacement with make variables, but until that effort is
> undertaken upstream, we need a bridge approach.
>
> In particular, this is required for dtschema validation,
> which is a requirement in kernel 5.16+

regards
Christian




_______________________________________________________
Christian
Eggers
Software Engineer
​
ARRI
Arnold & Richter Cine Technik GmbH & Co. Betriebs KG
Arriweg 17,
83071
Stephanskirchen
www.arri.com

+49 8036 3009-3118
CEggers@arri.de

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Re: kernel: export native PKGCONFIG variables

[Bruce Ashfield]

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On Wed, Dec 7, 2022 at 2:45 AM Christian Eggers <ceggers@arri.de> wrote:

> Hi Bruce,
>
> on 2021-11-23, you added the following patch:
>
> > 9172d61c57e23682c3d2c25701cbd53c84d01a27
> >
> > kernel: export native PKGCONFIG variables
> >
> > In a similar manner to cml1.bbclass, we export the pkg-config
> > variables to allow a direct call to pkg-config access to the
> > native sysroot versus the target sysroot.
> >
> > The kernel doesn't use pkg-config for target configuration,
> I found some calls in the tools/ directory of the kernel.
> Isn't this related to target configuration?
>

That meant "kernel target configuration", not userspace tools.


>
> > and has many explicit calls to pkg-config, without the
> > possibility of easy override to pkg-config-native.
> I just noticed that this has recently changed:
>
>
> https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=d5ea4fece4508bf8e72b659cd22fa4840d8d61e5
>
> This change is in Linux 6.0, but not in 5.15. Probably it
> could be backported easily.
>

I was aware of that change as well, but what we have works, so there's no
rush to remove that block of code. We support a wide range of kernels and
versions, so it needs to stay in place for some time yet.

Bruce


> >
> > The calls to pkg-config could be made cross friendly via
> > replacement with make variables, but until that effort is
> > undertaken upstream, we need a bridge approach.
> >
> > In particular, this is required for dtschema validation,
> > which is a requirement in kernel 5.16+
>
> regards
> Christian
>
>
>
> _______________________________________________________
> Christian
> Eggers
> Software Engineer
> ARRI
> Arnold & Richter Cine Technik GmbH & Co. Betriebs KG
> Arriweg 17 ,
> 83071
> Stephanskirchen
>
>
> *www.arri.com * <http://www.arri.com/>
> *+49 8036 3009-3118* <+49%208036%203009-3118>
> *CEggers@arri.de* <CEggers@arri.de>
>
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>
> Arnold & Richter Cine Technik GmbH & Co. Betriebs KG
>
> Sitz: München ‑ Registergericht: Amtsgericht München ‑ Handelsregisternummer: HRA 57918
> Persönlich haftender Gesellschafter: Arnold & Richter Cine Technik GmbH
>
> Sitz: München ‑ Registergericht: Amtsgericht München ‑ Handelsregisternummer: HRB 54477
>
> Geschäftsführer: Dr. Matthias Erb (Chairman); Dr. Michael Neuhäuser; Stephan Schenk; Walter Trauninger
>
>
>

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