[Nix-dev] Building linux kernle with manual-config.nix

[Sergey Mironov]

Thanks, I understand. I decided to enable the support for modules in
my kernel for now.

Here is a new wiki section regarding the topic:
https://nixos.org/wiki/How_to_tweak_Linux_kernel_config_options

Regards,
Sergey



2014-03-07 13:06 GMT+04:00 Shea Levy <shea at shealevy.com>:
> Hey Sergey,
>
> On Fri, Mar 07, 2014 at 12:17:50PM +0400, Sergey Mironov wrote:
>> Hi. I am trying to build my own minimalistic kernel with `buildLinux'
>> defined in kernel/manual-config.nix. I've written the wrapper
>> expression as follows:
>>
>> # linuxHandMade.nix
>> { stdenv, fetchurl, buildLinux } :
>>
>> buildLinux rec {
>>
>>   version = "3.10.28";
>>
>>   src = fetchurl {
>>     url = "mirror://kernel/linux/kernel/v3.x/linux-${version}.tar.xz";
>>     sha256 = "1blzvr3qywi8wxgl28zsn5djwgvw70yh3i6qjh2sz3zk9gnpd6mq";
>>   };
>>
>>   configfile = ./linux-config;
>>
>>   allowImportFromDerivation = true;
>> }
>>
>> where ./linux-config is the .config I have built manually by unpacking
>> kernel sources and doing 'make menuconfig'. Everything was OK until I
>> disabled the loadable modules support. The ./linux-config now contains
>> "# CONFIG_MODULES is not set" and kernel/manual-config.nix doesn't
>> work. The error is quite obscure:
>>
>> $ nix-build econat.nix -A linuxHandMade  --show-trace
>> error: while evaluating `callPackageWith' at
>> `/home/grwlf/proj/nixpkgs-econat/lib/customisation.nix:95:35':
>> while evaluating `makeOverridable' at
>> `/home/grwlf/proj/nixpkgs-econat/lib/customisation.nix:56:24':
>> while evaluating an anonymous function at
>> `/home/grwlf/proj/nixpkgs-econat/econat/apps/kernel.nix:1:1':
>> while evaluating an anonymous function at
>> `/home/grwlf/proj/nixpkgs-econat/pkgs/os-specific/linux/kernel/manual-config.nix:13:4':
>> while evaluating `mkDerivation' at
>> `/home/grwlf/proj/nixpkgs-econat/pkgs/stdenv/generic/default.nix:55:24':
>> while evaluating `addPassthru' at
>> `/home/grwlf/proj/nixpkgs-econat/lib/customisation.nix:100:22':
>> while evaluating an anonymous function at
>> `/nix/store/mf69pq5r5948h2q4wj4zfx69rn6zcfk4-nix-1.6.1/share/nix/corepkgs/derivation.nix:4:1':
>> value is null while a list was expected
>>
>
> That error is rubbish, and we'll fix that, but currently NixOS is not
> intended to support non-modular kernels. See [1] for where the
> restriction is specified. Lifting that would take only a little bit of
> work, just no one has gotten around to it.
>
> Cheers,
> Shea
>
> [1]: https://github.com/NixOS/nixpkgs/blob/6572708d3914a07a1c58f6162b999925ee3d695e/nixos/modules/system/boot/kernel.nix#L289
>>
>> I think I've already entered the purely-tested areas of Nixos but
>> still could anybody give me a clue of what may go wrong?
>>
>> Regards,
>> Sergey
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