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Linux kernel: Difference between revisions
add cross-compiling + compiling with clang
imported>Asymmetric (add pinning section) |
imported>Mic92 (add cross-compiling + compiling with clang) |
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If the source was unpacked and an initial config exists, you can run <code>make xconfig KCONFIG_CONFIG=build/.config</code> | If the source was unpacked and an initial config exists, you can run <code>make xconfig KCONFIG_CONFIG=build/.config</code> | ||
== Requesting a change in the default nixos kernel configuration == | == Requesting a change in the default nixos kernel configuration == | ||
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</syntaxHighlight> | </syntaxHighlight> | ||
=== Cross-compiling Linux from source === | |||
Save the following as <code>shell.nix</code> for your nix-shell: | |||
<syntaxHighlight lang=nix> | |||
{ pkgs ? import <nixpkgs> {} }: | |||
let | |||
# more platforms are defined here: https://github.com/NixOS/nixpkgs/blob/master/lib/systems/examples.nix | |||
aarch64 = pkgs.pkgsCross.aarch64-multiplatform; | |||
in | |||
aarch64.linux.overrideAttrs (old: { | |||
# the override is optional if you need for example more build dependencies | |||
nativeBuildInputs = old.nativeBuildInputs ++ [ pkgs.gllvm ]; | |||
} | |||
</syntaxHighlight> | |||
Than you can run the following commands (in the nix-shell <code>$makeFlags</code> will contain | |||
the necessary cross-compiling arguments) | |||
<syntaxHightlight lang=console> | |||
$ nix-shell | |||
# to configure | |||
nix-shell> make $makeFlags defconfig -j $(nproc) | |||
# to build | |||
nix-shelll> make $makeFlags -j $(nproc) | |||
</syntaxHightlight> | |||
=== Compiling Linux with clang === | |||
Save this as <code>shell.nix</code> | |||
<syntaxHighlight lang=nix> | |||
{ pkgs ? import <nixpkgs> {} }: | |||
pkgs.linux.override { | |||
# needs to be clang11Stdenv or newer | |||
stdenv = clang11Stdenv; | |||
} | |||
</syntaxHighlight> | |||
Than you can use: | |||
<syntaxHightlight lang=console> | |||
$ nix-shell | |||
# to configure | |||
nix-shell> make $makeFlags defconfig -j $(nproc) | |||
# to build | |||
nix-shelll> make $makeFlags -j $(nproc) | |||
</syntaxHightlight> | |||
=== Overriding kernel packages === | === Overriding kernel packages === | ||