Re: [Buildroot] [PATCH 0/7] Update kconfig inrastructure to Linux 7.2.9

[Petr Vorel <petr.vorel@gmail.com>]

> Hello Petr,

> First of all, thank you for having looked into this series !

Yw, I wish I had more time for testing (hopefully I find some more time).
So far I checked only "make {defconfig,nconfig,menuconfig,help}".
Big thank you to do that update.

> On 16/10/26 23:29, Petr Vorel wrote:
> > Thank you! FYI Now rebasing to current master requires resolve another conflict due
> > 5177cf9c2f ("package/openssl: move libopenssl/libressl options out of the choice")
> > (Not difficult to solve, but if you rebase you make it easier for reviewers.)
> I rebased on top of latest master, resolving the conflict, and pushed to
> https://gitlab.com/essensium-mind/buildroot/-/commits/bump-kconfig

Thank you! Maybe once a while rebase and force push until finally merged?

> > Slightly problematic is that output/ format changed. Therefore
> > without 'rm -rf output' make config fails:

> > $ make defconfig
> > Config.in:23: can't open file "(BASE_DIR)/.br2-external.in.paths"
> > make[1]: *** [Makefile:1050: defconfig] Error 1
> > make: *** [Makefile:83: _all] Error 2

> > Obviously this part in Config.in is wrong:

> > # br2-external paths definitions
> > source "$(BASE_DIR)/.br2-external.in.paths"

> > bisecting shows the first bad commit
> > 121d3e6800 ("*/Config.in: use the new $(VAR) syntax")

> > With removing output directory first everything works.
> Actually, only output/build/buildroot-config needs to be removed:

I guess there is no way to avoid people bump into this problem.
Maybe at least to document the need of removing the file in the git commit
message.

>     $ make defconfig
>     Config.in:23: can't open file "(BASE_DIR)/.br2-external.in.paths"
>     make: *** [Makefile:1050: defconfig] Error 1

>     $ rm -r output/build/buildroot-config
>     $ make defconfig
>     [...]
>     #
>     # configuration written to /home/titou/Code/buildroot/.config
>     #

> So there is probably some incorrect build dependency (kconfig source ->
> binaries).
> I will look into this.

Could be. Again, thank you for having a look.

And, if you have enough time and motivation, after this is merged, my personal
wish would be to speedup 'make help' (it takes 9 sec on my laptop, kernel's
target is much faster), but this is not due the update (an old problem).

> > $ rm -rf output/
> > $ make defconfig
> > ...

> > # No change to ...buildroot/.config


> There *are* some changes though !
> This is because of upstream commit aff11cd983 [1]. Before this series in


> Buildroot there was only the title of a menu in .config, now there is an end
> marker as well.
> See this example:

>      #
>      # Database
>     @@ -1829,6 +1855,7 @@
>      # sqlitecpp needs a toolchain w/ C++, threads, gcc >= 4.9
>      #
>      # BR2_PACKAGE_UNIXODBC is not set
>     +# end of Database

Yes, I noticed that during 'make defconfig' output comparison, done by aff11cd983 [1].

Kind regards,
Petr

> I checked that this is the only change in .config output:

>     diff -u .config.old .config | grep -E '^[+-]' | grep -v '# end of'
>     --- .config.old 2026-10-18 17:21:54.495007495 +0200
>     +++ .config 2026-10-18 17:44:13.970027594 +0200
>     -# Buildroot 2026.08-1042-g279f4b6237 Configuration
>     +# Buildroot 2026.08-1048-g55ffb69e12 Configuration


> Best regards,
> Titouan

> [1] aff11cd983 ("kconfig: Terminate menu blocks with a comment in the
> generated config")
> https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/scripts/kconfig?id=aff11cd983ec0850651ee9b1c2a88b33358cb2f2
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