140 lines
4.4 KiB
Nix
140 lines
4.4 KiB
Nix
{ buildPackages
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, ncurses
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, callPackage
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, perl
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, bison ? null
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, flex ? null
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, stdenv
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, # The kernel source tarball.
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src
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, # The kernel version.
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version
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, # Allows overriding the default defconfig
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defconfig ? null
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, # Legacy overrides to the intermediate kernel config, as string
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extraConfig ? ""
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, # kernel intermediate config overrides, as a set
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structuredExtraConfig ? {}
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, # The version number used for the module directory
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modDirVersion ? version
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, # An attribute set whose attributes express the availability of
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# certain features in this kernel. E.g. `{iwlwifi = true;}'
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# indicates a kernel that provides Intel wireless support. Used in
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# NixOS to implement kernel-specific behaviour.
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features ? {}
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, # A list of patches to apply to the kernel. Each element of this list
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# should be an attribute set {name, patch} where `name' is a
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# symbolic name and `patch' is the actual patch. The patch may
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# optionally be compressed with gzip or bzip2.
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kernelPatches ? []
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, ignoreConfigErrors ? hostPlatform.platform.name != "pc" ||
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hostPlatform != stdenv.buildPlatform
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, extraMeta ? {}
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, hostPlatform
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# easy overrides to hostPlatform.platform members
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, autoModules ? hostPlatform.platform.kernelAutoModules
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, preferBuiltin ? hostPlatform.platform.kernelPreferBuiltin or false
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, kernelArch ? hostPlatform.platform.kernelArch
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, mkValueOverride ? null
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, ...
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}:
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assert stdenv.isLinux;
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let
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lib = stdenv.lib;
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# Combine the `features' attribute sets of all the kernel patches.
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kernelFeatures = lib.fold (x: y: (x.features or {}) // y) ({
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iwlwifi = true;
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efiBootStub = true;
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needsCifsUtils = true;
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netfilterRPFilter = true;
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grsecurity = false;
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xen_dom0 = false;
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} // features) kernelPatches;
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intermediateNixConfig = import ./common-config.nix {
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inherit stdenv version structuredExtraConfig mkValueOverride;
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# append extraConfig for backwards compatibility but also means the user can't override the kernelExtraConfig part
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extraConfig = extraConfig + lib.optionalString (hostPlatform.platform ? kernelExtraConfig) hostPlatform.platform.kernelExtraConfig;
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features = kernelFeatures; # Ensure we know of all extra patches, etc.
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};
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kernelConfigFun = baseConfig:
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let
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configFromPatches =
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map ({extraConfig ? "", ...}: extraConfig) kernelPatches;
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in lib.concatStringsSep "\n" ([baseConfig] ++ configFromPatches);
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configfile = stdenv.mkDerivation {
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inherit ignoreConfigErrors autoModules preferBuiltin kernelArch;
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name = "linux-config-${version}";
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generateConfig = ./generate-config.pl;
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kernelConfig = kernelConfigFun intermediateNixConfig;
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passAsFile = [ "kernelConfig" ];
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depsBuildBuild = [ buildPackages.stdenv.cc ];
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nativeBuildInputs = [ perl ]
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++ lib.optionals (stdenv.lib.versionAtLeast version "4.16") [ bison flex ];
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platformName = hostPlatform.platform.name;
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# e.g. "defconfig"
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kernelBaseConfig = if defconfig != null then defconfig else hostPlatform.platform.kernelBaseConfig;
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# e.g. "bzImage"
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kernelTarget = hostPlatform.platform.kernelTarget;
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prePatch = kernel.prePatch + ''
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# Patch kconfig to print "###" after every question so that
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# generate-config.pl from the generic builder can answer them.
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sed -e '/fflush(stdout);/i\printf("###");' -i scripts/kconfig/conf.c
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'';
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inherit (kernel) src patches preUnpack;
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buildPhase = ''
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export buildRoot="''${buildRoot:-build}"
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# Get a basic config file for later refinement with $generateConfig.
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make HOSTCC=${buildPackages.stdenv.cc.targetPrefix}gcc -C . O="$buildRoot" $kernelBaseConfig ARCH=$kernelArch
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# Create the config file.
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echo "generating kernel configuration..."
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ln -s "$kernelConfigPath" "$buildRoot/kernel-config"
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DEBUG=1 ARCH=$kernelArch KERNEL_CONFIG="$buildRoot/kernel-config" AUTO_MODULES=$autoModules \
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PREFER_BUILTIN=$preferBuiltin BUILD_ROOT="$buildRoot" SRC=. perl -w $generateConfig
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'';
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installPhase = "mv $buildRoot/.config $out";
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enableParallelBuilding = true;
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};
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kernel = (callPackage ./manual-config.nix {}) {
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inherit version modDirVersion src kernelPatches stdenv extraMeta configfile hostPlatform;
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config = { CONFIG_MODULES = "y"; CONFIG_FW_LOADER = "m"; };
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};
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passthru = {
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features = kernelFeatures;
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passthru = kernel.passthru // (removeAttrs passthru [ "passthru" ]);
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};
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in lib.extendDerivation true passthru kernel
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