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{ stdenv, perl, buildLinux
, # The kernel source tarball.
src
, # The kernel version.
version
, # Overrides to the kernel config.
extraConfig ? ""
, # The version number used for the module directory
modDirVersion ? version
, # An attribute set whose attributes express the availability of
# certain features in this kernel. E.g. `{iwlwifi = true;}'
# indicates a kernel that provides Intel wireless support. Used in
# NixOS to implement kernel-specific behaviour.
features ? {}
, # A list of patches to apply to the kernel. Each element of this list
# should be an attribute set {name, patch} where `name' is a
# symbolic name and `patch' is the actual patch. The patch may
# optionally be compressed with gzip or bzip2.
kernelPatches ? []
, ignoreConfigErrors ? stdenv.platform.name != "pc"
, extraMeta ? {}
, ...
}:
assert stdenv.platform.name == "sheevaplug" -> stdenv.platform.uboot != null;
assert stdenv.isLinux;
let
lib = stdenv.lib;
kernelConfigFun = baseConfig:
let
configFromPatches =
map ({extraConfig ? "", ...}: extraConfig) kernelPatches;
in lib.concatStringsSep "\n" ([baseConfig] ++ configFromPatches);
configfile = stdenv.mkDerivation {
inherit ignoreConfigErrors;
name = "linux-config-${version}";
generateConfig = ./generate-config.pl;
kernelConfig = kernelConfigFun config;
nativeBuildInputs = [ perl ];
platformName = stdenv.platform.name;
kernelBaseConfig = stdenv.platform.kernelBaseConfig;
kernelTarget = stdenv.platform.kernelTarget;
autoModules = stdenv.platform.kernelAutoModules;
arch = stdenv.platform.kernelArch;
preConfigure = ''
buildFlagsArray+=("KBUILD_BUILD_TIMESTAMP=Thu Jan 1 00:00:01 UTC 1970")
'';
crossAttrs = let
cp = stdenv.cross.platform;
in {
arch = cp.kernelArch;
platformName = cp.name;
kernelBaseConfig = cp.kernelBaseConfig;
kernelTarget = cp.kernelTarget;
autoModules = cp.kernelAutoModules;
# Just ignore all options that don't apply (We are lazy).
ignoreConfigErrors = true;
kernelConfig = kernelConfigFun configCross;
inherit (kernel.crossDrv) src patches preUnpack;
};
prePatch = kernel.prePatch + ''
# Patch kconfig to print "###" after every question so that
# generate-config.pl from the generic builder can answer them.
sed -e '/fflush(stdout);/i\printf("###");' -i scripts/kconfig/conf.c
'';
inherit (kernel) src patches preUnpack;
buildPhase = ''
cd $buildRoot
# Get a basic config file for later refinement with $generateConfig.
make -C ../$sourceRoot O=$PWD $kernelBaseConfig ARCH=$arch
# Create the config file.
echo "generating kernel configuration..."
echo "$kernelConfig" > kernel-config
DEBUG=1 ARCH=$arch KERNEL_CONFIG=kernel-config AUTO_MODULES=$autoModules \
SRC=../$sourceRoot perl -w $generateConfig
'';
installPhase = "mv .config $out";
enableParallelBuilding = true;
};
kernel = buildLinux {
inherit version modDirVersion src kernelPatches;
configfile = configfile.nativeDrv or configfile;
crossConfigfile = configfile.crossDrv or configfile;
config = { CONFIG_MODULES = "y"; CONFIG_FW_LOADER = "m"; };
crossConfig = { CONFIG_MODULES = "y"; CONFIG_FW_LOADER = "m"; };
};
passthru = {
# Combine the `features' attribute sets of all the kernel patches.
features = lib.fold (x: y: (x.features or {}) // y) features kernelPatches;
meta = kernel.meta // extraMeta;
passthru = kernel.passthru // (removeAttrs passthru [ "passthru" "meta" ]);
};
configWithPlatform = kernelPlatform: import ./common-config.nix
{ inherit stdenv version kernelPlatform extraConfig;
features = passthru.features; # Ensure we know of all extra patches, etc.
};
config = configWithPlatform stdenv.platform;
configCross = configWithPlatform stdenv.cross.platform;
nativeDrv = lib.addPassthru kernel.nativeDrv passthru;
crossDrv = lib.addPassthru kernel.crossDrv passthru;
in if kernel ? crossDrv then nativeDrv // { inherit nativeDrv crossDrv; } else lib.addPassthru kernel passthru
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