Re: Custom kernel config is not taken by guix

[Guillaume Le Vaillant <glv@posteo.net>]

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eisbaer@tilde.team skribis:

> Hello,
> I'm having problems compiling the linux-libre kernel with a custom config. I'm aiming at enabeling the debug info.
> The problem I am troubled with is that the configuration I am telling guix to use in my /etc/config.scm (guix system reconfigure /etc/config.scm) is not taken by guix for compiling the kernel. Instead some other configuration file is used wich hasn't the options set I want it to have. The config file I want to use is in the same folder as the /etc/config.scm and is named debug_config2. I am checking /proc/config.gz if the options I changed in debug_config2 are changed and they are not.
>
> greetings :)
>
> ================================
> /etc/config.scm
> ================================
> ;; Diese Betriebssystemkonfiguration wurde vom                                                                                                                 
> ;; grafischen Installationsprogramm erzeugt.                                                                                                                   
> ;;                                                                                                                                                             
> ;; Sobald die Installation abgeschlossen ist, kann man die                                                                                                     
> ;; Systemkonfiguration einsehen, verstehen und modifizieren. Übergeben                                                                                         
> ;; Sie die modifizierte Systemkonfiguration an den Befehl                                                                                                      
> ;; 'guix system reconfigure', damit die Veränderungen wirksam werden.                                                                                          
>
>
> ;; Gibt an, welche Module importiert werden müssen, um auf die                                                                                                 
> ;; benutzten Variablen dieser Konfiguration zugreifen zu können.                                                                                               
> (use-modules (gnu)
>              (gnu packages linux))
> (use-service-modules cups desktop networking ssh xorg)
>
>
> ;(define %custom-linux-config                                                                                                                                  
> ;  (append `(("CONFIG_DEBUG_INFO" . #t))                                                                                                                       
> ;         (@@ (gnu packages linux) %default-extra-linux-options)))                                                                                             
>
> ;(define linux-libre-debug                                                                                                                                     
> ;  ((@@ (gnu packages linux) make-linux-libre*)                                                                                                                
> ;   (@@ (gnu packages linux) linux-libre-version)                                                                                                              
> ;   (@@ (gnu packages linux) linux-libre-gnu-revision)                                                                                                         
> ;   (@@ (gnu packages linux) linux-libre-source)                                                                                                               
> ;   '("x86_64-linux")                                                                                                                                          
> ;   #:extra-version "debug"                                                                                                                                    
> ;   #:extra-options %custom-linux-config))                                                                                                                     
>
> (use-modules (guix packages)
>              (gnu)
>              (gnu packages linux)
>              (srfi srfi-1))
>
> (define-public linux-libreDEBUG
>   (package
>    (inherit linux-libre)
>    (name "linux-libreDEBUG")
>    (native-inputs
>     `(("kconfig" ,(local-file "debug_config2"))
>       ,@(alist-delete "kconfig"
>                       (package-native-inputs linux-libre))))
>
>
>     ))
>
>
> (operating-system
>   (locale "de_DE.utf8")
>   (timezone "Europe/Berlin")
>   (keyboard-layout (keyboard-layout "de"))
>   (host-name "guix-test")
>
>   (kernel linux-libreDEBUG)
>   ;(kernel linux-libre)                                                                                                                                        
>   [...]

Hi.

There's a 'customize-linux' function (in the (gnu packages linux)
module) to make Linux kernels with custom configurations. I have not
tested, but maybe something like the following could do what you want:

--8<---------------cut here---------------start------------->8---
(define linux-libre-debug
  (customize-linux #:linux linux-libre
                   #:configs '("CONFIG_DEBUG_INFO=y")))

(operating-system
  (kernel linux-libre-debug)
  ...)
--8<---------------cut here---------------end--------------->8---

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