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|
{ stdenv, runCommand, nettools, bc, perl, kmod, writeTextFile, ubootChooser }:
let
inherit (stdenv.lib)
hasAttr getAttr optionalAttrs optional optionalString maintainers platforms;
# Function to parse the config file into a nix expression
readConfig = configFile:
let
configAttrs = import "${runCommand "config.nix" {} ''
echo "{" > "$out"
while IFS='=' read key val; do
[ "x''${key#CONFIG_}" != "x$key" ] || continue
no_firstquote="''${val#\"}";
echo ' "'"$key"'" = "'"''${no_firstquote%\"}"'";' >> "$out"
done < "${configFile}"
echo "}" >> $out
''}";
config = configAttrs // rec {
attrName = attr: "CONFIG_" + attr;
isSet = attr: hasAttr (attrName attr) config;
getValue = attr: if isSet attr then getAttr (attrName attr) config else null;
isYes = attr: (isSet attr) && ((getValue attr) == "y");
isNo = attr: (isSet attr) && ((getValue attr) == "n");
isModule = attr: (isSet attr) && ((getValue attr) == "m");
isEnabled = attr: (isModule attr) || (isYes attr);
isDisabled = attr: (!(isSet attr)) || (isNo attr);
};
in
config;
in
{
# The kernel version
version,
# The version of the kernel module directory
modDirVersion ? version,
# The kernel source (tarball, git checkout, etc.)
src,
# Any patches
kernelPatches ? [],
# The kernel .config file
configfile,
# Manually specified nixexpr representing the config
# If unspecified, this will be autodetected from the .config
config ? optionalAttrs allowImportFromDerivation (readConfig configfile),
# Whether to utilize the controversial import-from-derivation feature to parse the config
allowImportFromDerivation ? false
}:
let
installkernel = writeTextFile { name = "installkernel"; executable=true; text = ''
#!${stdenv.shell} -e
mkdir -p $4
cp -av $2 $4
cp -av $3 $4
'';};
isModular = config.isYes "MODULES";
installsFirmware = (config.isEnabled "FW_LOADER") &&
(isModular || (config.isDisabled "FIRMWARE_IN_KERNEL"));
commonMakeFlags = [
"O=$(buildRoot)"
];
# Some image types need special install targets (e.g. uImage is installed with make uinstall)
installTarget = target: [ (if target == "uImage" then "uinstall" else "install") ];
sourceRoot = stdenv.mkDerivation {
name = "linux-${version}-source";
inherit src;
patches = map (p: p.patch) kernelPatches;
phases = [ "unpackPhase" "patchPhase" "installPhase" ];
prePatch = ''
for mf in $(find -name Makefile -o -name Makefile.include -o -name install.sh); do
echo "stripping FHS paths in \`$mf'..."
sed -i "$mf" -e 's|/usr/bin/||g ; s|/bin/||g ; s|/sbin/||g'
done
sed -i Makefile -e 's|= depmod|= ${kmod}/sbin/depmod|'
'';
installPhase = ''
cd ..
mv $sourceRoot $out
'';
};
in
stdenv.mkDerivation {
name = "linux-${version}";
enableParallelBuilding = true;
outputs = if isModular then [ "out" "dev" ] else null;
passthru = {
inherit version modDirVersion config kernelPatches src;
};
inherit sourceRoot;
unpackPhase = ''
mkdir build
export buildRoot="$(pwd)/build"
cd ${sourceRoot}
'';
configurePhase = ''
runHook preConfigure
ln -sv ${configfile} $buildRoot/.config
make $makeFlags "''${makeFlagsArray[@]}" oldconfig
runHook postConfigure
'';
nativeBuildInputs = [ perl bc nettools ] ++ optional (stdenv.platform.uboot != null)
(ubootChooser stdenv.platform.uboot);
makeFlags = commonMakeFlags ++ [
"ARCH=${stdenv.platform.kernelArch}"
];
buildFlags = [ stdenv.platform.kernelTarget ] ++ optional isModular "modules";
installFlags = [
"INSTALLKERNEL=${installkernel}"
"INSTALL_PATH=$(out)"
] ++ (optional isModular "INSTALL_MOD_PATH=$(out)")
++ optional installsFirmware "INSTALL_FW_PATH=$(out)/lib/firmware";
installTargets = installTarget stdenv.platform.kernelTarget;
crossAttrs = let cp = stdenv.cross.platform; in {
buildFlags = [ cp.kernelTarget ] ++ optional isModular "modules";
makeFlags = commonMakeFlags ++ [
"ARCH=${cp.kernelArch}"
"CROSS_COMPILE=$(crossConfig)-"
];
installTargets = installTarget cp.kernelTarget;
buildInputs = optional (cp.uboot != null) (ubootChooser cp.uboot).crossDrv;
};
postInstall = optionalString installsFirmware ''
mkdir -p $out/lib/firmware
'' + (if isModular then ''
make modules_install $makeFlags "''${makeFlagsArray[@]}" \
$installFlags "''${installFlagsArray[@]}"
unlink $out/lib/modules/${modDirVersion}/build
mkdir -p $dev/lib/modules/${modDirVersion}
mv $out/lib/modules/${modDirVersion}/source $dev/lib/modules/${modDirVersion}/source
mv $buildRoot $dev/lib/modules/${modDirVersion}/build
'' else optionalString installsFirmware ''
make firmware_install $makeFlags "''${makeFlagsArray[@]}" \
$installFlags "''${installFlagsArray[@]}"
'');
postFixup = if isModular then ''
if [ -z "$dontStrip" ]; then
find $out -name "*.ko" -print0 | xargs -0 -r ''${crossConfig+$crossConfig-}strip -S
# Remove all references to the source directory to avoid unneeded
# runtime dependencies
find $out -name "*.ko" -print0 | xargs -0 -r sed -i \
"s|${sourceRoot}|$NIX_STORE/eeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee-${sourceRoot.name}|g"
fi
'' else null;
meta = {
description = "The Linux kernel";
license = "GPLv2";
homepage = http://www.kernel.org/;
maintainers = [
maintainers.shlevy
];
platforms = platforms.linux;
};
}
|