138 lines
4.2 KiB
Nix
138 lines
4.2 KiB
Nix
{ stdenv, perl, buildLinux
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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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, # Overrides to the kernel config.
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extraConfig ? ""
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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 ? stdenv.platform.name != "pc"
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, extraMeta ? {}
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, hostPlatform
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, ...
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}:
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assert stdenv.platform.name == "sheevaplug" -> stdenv.platform.uboot != null;
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assert stdenv.isLinux;
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let
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lib = stdenv.lib;
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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;
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name = "linux-config-${version}";
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generateConfig = ./generate-config.pl;
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kernelConfig = kernelConfigFun config;
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nativeBuildInputs = [ perl ];
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platformName = stdenv.platform.name;
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kernelBaseConfig = stdenv.platform.kernelBaseConfig;
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kernelTarget = stdenv.platform.kernelTarget;
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autoModules = stdenv.platform.kernelAutoModules;
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preferBuiltin = stdenv.platform.kernelPreferBuiltin or false;
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arch = stdenv.platform.kernelArch;
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crossAttrs = let
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cp = hostPlatform.platform;
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in {
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arch = cp.kernelArch;
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platformName = cp.name;
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kernelBaseConfig = cp.kernelBaseConfig;
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kernelTarget = cp.kernelTarget;
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autoModules = cp.kernelAutoModules;
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# Just ignore all options that don't apply (We are lazy).
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ignoreConfigErrors = true;
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kernelConfig = kernelConfigFun configCross;
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inherit (kernel.crossDrv) src patches preUnpack;
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};
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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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cd $buildRoot
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# Get a basic config file for later refinement with $generateConfig.
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make -C ../$sourceRoot O=$PWD $kernelBaseConfig ARCH=$arch
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# Create the config file.
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echo "generating kernel configuration..."
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echo "$kernelConfig" > kernel-config
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DEBUG=1 ARCH=$arch KERNEL_CONFIG=kernel-config AUTO_MODULES=$autoModules \
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PREFER_BUILTIN=$preferBuiltin SRC=../$sourceRoot perl -w $generateConfig
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'';
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installPhase = "mv .config $out";
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enableParallelBuilding = true;
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};
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kernel = buildLinux {
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inherit version modDirVersion src kernelPatches stdenv;
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configfile = configfile.nativeDrv or configfile;
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crossConfigfile = configfile.crossDrv or configfile;
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config = { CONFIG_MODULES = "y"; CONFIG_FW_LOADER = "m"; };
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crossConfig = { CONFIG_MODULES = "y"; CONFIG_FW_LOADER = "m"; };
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};
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passthru = {
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# Combine the `features' attribute sets of all the kernel patches.
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features = lib.fold (x: y: (x.features or {}) // y) features kernelPatches;
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meta = kernel.meta // extraMeta;
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passthru = kernel.passthru // (removeAttrs passthru [ "passthru" "meta" ]);
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};
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configWithPlatform = kernelPlatform: import ./common-config.nix
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{ inherit stdenv version kernelPlatform extraConfig;
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features = passthru.features; # Ensure we know of all extra patches, etc.
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};
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config = configWithPlatform stdenv.platform;
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configCross = configWithPlatform hostPlatform.platform;
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nativeDrv = lib.addPassthru kernel.nativeDrv passthru;
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crossDrv = lib.addPassthru kernel.crossDrv passthru;
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in if kernel ? crossDrv then nativeDrv // { inherit nativeDrv crossDrv; } else lib.addPassthru kernel passthru
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