[ptxdist] Forcing kernel options from userspace package

[ptxdist] Forcing kernel options from userspace package

[christoph]

Hi,

is there a way to force a specific kernel option by selecting a userland package?

The concrete case:
I’m working on a project that uses the SCTP protocol for which I’ve created a libsctp package for the userland support library of SCTP. The libsctp package is forced by my application via the corresponding “select LIBSCTP” in rules/my_app.in. Now I’m looking for a way to have libsctp force the kernel’s config flag CONFIG_IP_SCTP to be set. Does ptxdist provide any such mechanism or are the userland’s KConfig and the kernel’s KConfig totally separated?

Regards
Christoph

-- 
rüdiger.engineering
Christoph Rüdiger
Düsseldorfer Str. 12
45145 Essen
Germany
 
phone: +49 201 458 478 58

_______________________________________________
ptxdist mailing list
ptxdist@pengutronix.de

Re: [ptxdist] Forcing kernel options from userspace package

[Michael Olbrich]

Hi,

On Tue, Jun 06, 2017 at 07:06:47PM +0000, christoph@ruediger.engineering wrote:
> is there a way to force a specific kernel option by selecting a userland package?
> 
> The concrete case:
> I’m working on a project that uses the SCTP protocol for which I’ve created a
> libsctp package for the userland support library of SCTP. The libsctp package
> is forced by my application via the corresponding “select LIBSCTP” in
> rules/my_app.in. Now I’m looking for a way to have libsctp force the kernel’s
> config flag CONFIG_IP_SCTP to be set. Does ptxdist provide any such mechanism
> or are the userland’s KConfig and the kernel’s KConfig totally separated?

That's not possible and unlikely to change. That would mean calling kconfig
for the kernel in 'ptxdist menuconfig' and that's not possible. The kernel
source code may not be available at that point.
I suggest a validation script that checks, that the two configs fit
together. Parsing ptxconfig is quite simple.

Michael

-- 
Pengutronix e.K.                           |                             |
Industrial Linux Solutions                 | http://www.pengutronix.de/  |
Peiner Str. 6-8, 31137 Hildesheim, Germany | Phone: +49-5121-206917-0    |
Amtsgericht Hildesheim, HRA 2686           | Fax:   +49-5121-206917-5555 |

_______________________________________________
ptxdist mailing list
ptxdist@pengutronix.de

Re: [ptxdist] Forcing kernel options from userspace package

[Alexander Dahl]

[-- Attachment #1.1: Type: text/plain, Size: 771 bytes --]

Hei hei,

On Mon, Jun 26, 2017 at 10:40:08AM +0200, Michael Olbrich wrote:
> I suggest a validation script that checks, that the two configs fit
> together. Parsing ptxconfig is quite simple.

That's exactly what we do when building release images. One part of
the script checks if certain options in the ptxconfig and kernelconfig
are set/unset, to ensure no wrong settings slip through into a
production image. It's a simple shell script, easy to write yourself.

Greets
Alex

-- 
»With the first link, the chain is forged. The first speech censured, 
the first thought forbidden, the first freedom denied, chains us all 
irrevocably.« (Jean-Luc Picard, quoting Judge Aaron Satie)
*** GnuPG-FP: C28E E6B9 0263 95CF 8FAF  08FA 34AD CD00 7221 5CC6 ***

[-- Attachment #1.2: Type: application/pgp-signature, Size: 819 bytes --]

[-- Attachment #2: Type: text/plain, Size: 91 bytes --]

_______________________________________________
ptxdist mailing list
ptxdist@pengutronix.de