nixpkgs/pkgs/os-specific/linux/hid-t150/default.nix
Maximilian Bosch 5645cd22d4
linux: expose make flags for modules in linuxKernel.packages.linux_X_Y
Closes #376820

The issue with providing `moduleMakeFlags` via `passthru` of the kernel
package is that when this package gets overriden[1], the `moduleMakeFlags`
list still references the kernel without the overrides.

This broke e.g. kernel modules of linux-rpi4 which can be reproduced
with

    nix-build --argstr system aarch64-linux -A linuxKernel.packages.linux_rpi4.zfs_2_3

This used to break with

    Error: modDirVersion 6.6.51 specified in the Nix expression is wrong, it should be: 6.6.51-v8

since KBUILD_OUTPUT referenced the kernel without the changes from
`overrideDerivation` that also changes the `modDirVersion`.

The new approach is to add the build flags right into
`linuxKernel.packages.linux_X_Y`: that way we don't need any hacks to
update `moduleMakeFlags` when the derivation with the passthru gets
overridden.

By using the fixpoint of the package-set, the `kernelModuleMakeFlags`
list is correctly updated. E.g. given

    with import ./. {};

    linuxKernel.packages.linux_6_6.extend (self: super: {
      kernel = super.kernel.overrideAttrs (_: {
        name = "linux-snens";
      });
    })

the `makeFlags` is correctly updated:

    $ nix-instantiate snenskek.nix -A zfs_2_3.makeFlags --eval --strict
    [ "ARCH=x86_64" "CROSS_COMPILE=" "KBUILD_OUTPUT=/nix/store/gsp68549k1aqbwxwczpgw67w5jjn4shw-linux-snens-dev/lib/modules/6.6.74/build" ]

[1] E.g. `linux-rpi4`.
2025-01-27 16:09:50 +01:00

42 lines
1.1 KiB
Nix

{
stdenv,
lib,
fetchFromGitHub,
kernel,
kernelModuleMakeFlags,
}:
stdenv.mkDerivation rec {
pname = "hid-t150";
#https://github.com/scarburato/t150_driver/blob/165d0601e11576186c9416c40144927549ef804d/install.sh#L3
version = "0.8a";
src = fetchFromGitHub {
owner = "scarburato";
repo = "t150_driver";
rev = "580b79b7b479076ba470fcc21fbd8484f5328546";
hash = "sha256-6xqm8500+yMXA/WonMv1JAOS/oIeSNDp9HFuYkEd03U=";
};
nativeBuildInputs = kernel.moduleBuildDependencies;
sourceRoot = "${src.name}/hid-t150";
makeFlags = kernelModuleMakeFlags ++ [
"KDIR=${kernel.dev}/lib/modules/${kernel.modDirVersion}/build"
"INSTALL_MOD_PATH=${placeholder "out"}"
];
installPhase = ''
make -C ${kernel.dev}/lib/modules/${kernel.modDirVersion}/build M=$(pwd) modules_install $makeFlags
'';
meta = with lib; {
description = "Linux kernel driver for Thrustmaster T150 and TMX Force Feedback wheel";
homepage = "https://github.com/scarburato/t150_driver";
license = licenses.gpl2;
maintainers = [ maintainers.dbalan ];
platforms = platforms.linux;
};
}