a04d8532c2
linux 4.8 onwards support gcc plugins. This patch adds build inputs required to make use of gcc plugins to the generic kernel build environment.
250 lines
8.7 KiB
Nix
250 lines
8.7 KiB
Nix
{ stdenv, runCommand, nettools, bc, perl, gmp, libmpc, mpfr, kmod, openssl
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, writeTextFile, ubootChooser
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}:
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let
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readConfig = configfile: import (runCommand "config.nix" {} ''
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echo "{" > "$out"
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while IFS='=' read key val; do
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[ "x''${key#CONFIG_}" != "x$key" ] || continue
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no_firstquote="''${val#\"}";
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echo ' "'"$key"'" = "'"''${no_firstquote%\"}"'";' >> "$out"
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done < "${configfile}"
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echo "}" >> $out
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'').outPath;
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in {
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# The kernel version
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version,
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# The version of the kernel module directory
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modDirVersion ? version,
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# The kernel source (tarball, git checkout, etc.)
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src,
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# Any patches
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kernelPatches ? [],
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# Patches for native compiling only
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nativeKernelPatches ? [],
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# Patches for cross compiling only
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crossKernelPatches ? [],
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# The native kernel .config file
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configfile,
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# The cross kernel .config file
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crossConfigfile ? configfile,
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# Manually specified nixexpr representing the config
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# If unspecified, this will be autodetected from the .config
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config ? stdenv.lib.optionalAttrs allowImportFromDerivation (readConfig configfile),
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# Cross-compiling config
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crossConfig ? if allowImportFromDerivation then (readConfig crossConfigfile) else config,
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# Whether to utilize the controversial import-from-derivation feature to parse the config
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allowImportFromDerivation ? false
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}:
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let
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inherit (stdenv.lib)
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hasAttr getAttr optional optionalString optionalAttrs maintainers platforms;
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installkernel = writeTextFile { name = "installkernel"; executable=true; text = ''
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#!${stdenv.shell} -e
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mkdir -p $4
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cp -av $2 $4
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cp -av $3 $4
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''; };
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commonMakeFlags = [
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"O=$(buildRoot)"
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] ++ stdenv.lib.optionals (stdenv.platform ? kernelMakeFlags)
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stdenv.platform.kernelMakeFlags;
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drvAttrs = config_: platform: kernelPatches: configfile:
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let
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config = let attrName = attr: "CONFIG_" + attr; in {
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isSet = attr: hasAttr (attrName attr) config;
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getValue = attr: if config.isSet attr then getAttr (attrName attr) config else null;
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isYes = attr: (config.getValue attr) == "y";
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isNo = attr: (config.getValue attr) == "n";
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isModule = attr: (config.getValue attr) == "m";
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isEnabled = attr: (config.isModule attr) || (config.isYes attr);
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isDisabled = attr: (!(config.isSet attr)) || (config.isNo attr);
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} // config_;
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isModular = config.isYes "MODULES";
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installsFirmware = (config.isEnabled "FW_LOADER") &&
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(isModular || (config.isDisabled "FIRMWARE_IN_KERNEL"));
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in (optionalAttrs isModular { outputs = [ "out" "dev" ]; }) // {
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passthru = {
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inherit version modDirVersion config kernelPatches configfile;
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};
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inherit src;
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preUnpack = ''
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mkdir build
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export buildRoot="$(pwd)/build"
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'';
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patches = map (p: p.patch) kernelPatches;
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prePatch = ''
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for mf in $(find -name Makefile -o -name Makefile.include -o -name install.sh); do
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echo "stripping FHS paths in \`$mf'..."
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sed -i "$mf" -e 's|/usr/bin/||g ; s|/bin/||g ; s|/sbin/||g'
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done
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sed -i Makefile -e 's|= depmod|= ${kmod}/bin/depmod|'
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'';
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configurePhase = ''
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runHook preConfigure
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ln -sv ${configfile} $buildRoot/.config
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make $makeFlags "''${makeFlagsArray[@]}" oldconfig
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runHook postConfigure
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make $makeFlags prepare
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actualModDirVersion="$(cat $buildRoot/include/config/kernel.release)"
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if [ "$actualModDirVersion" != "${modDirVersion}" ]; then
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echo "Error: modDirVersion specified in the Nix expression is wrong, it should be: $actualModDirVersion"
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exit 1
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fi
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# Note: we can get rid of this once http://permalink.gmane.org/gmane.linux.kbuild.devel/13800 is merged.
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buildFlagsArray+=("KBUILD_BUILD_TIMESTAMP=$(date -u -d @$SOURCE_DATE_EPOCH)")
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'';
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buildFlags = [
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"KBUILD_BUILD_VERSION=1-NixOS"
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platform.kernelTarget
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"vmlinux" # for "perf" and things like that
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] ++ optional isModular "modules";
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installFlags = [
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"INSTALLKERNEL=${installkernel}"
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"INSTALL_PATH=$(out)"
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] ++ (optional isModular "INSTALL_MOD_PATH=$(out)")
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++ optional installsFirmware "INSTALL_FW_PATH=$(out)/lib/firmware";
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# Some image types need special install targets (e.g. uImage is installed with make uinstall)
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installTargets = [ (if platform.kernelTarget == "uImage" then "uinstall" else
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if platform.kernelTarget == "zImage" || platform.kernelTarget == "Image.gz" then "zinstall" else
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"install") ];
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postInstall = ''
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mkdir -p $dev
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cp $buildRoot/vmlinux $dev/
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'' + (optionalString installsFirmware ''
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mkdir -p $out/lib/firmware
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'') + (if (platform ? kernelDTB && platform.kernelDTB) then ''
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make $makeFlags "''${makeFlagsArray[@]}" dtbs dtbs_install INSTALL_DTBS_PATH=$out/dtbs
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'' else "") + (if isModular then ''
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if [ -z "$dontStrip" ]; then
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installFlagsArray+=("INSTALL_MOD_STRIP=1")
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fi
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make modules_install $makeFlags "''${makeFlagsArray[@]}" \
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$installFlags "''${installFlagsArray[@]}"
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unlink $out/lib/modules/${modDirVersion}/build
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unlink $out/lib/modules/${modDirVersion}/source
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mkdir -p $dev/lib/modules/${modDirVersion}/build
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cp -dpR ../$sourceRoot $dev/lib/modules/${modDirVersion}/source
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cd $dev/lib/modules/${modDirVersion}/source
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cp $buildRoot/{.config,Module.symvers} $dev/lib/modules/${modDirVersion}/build
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make modules_prepare $makeFlags "''${makeFlagsArray[@]}" O=$dev/lib/modules/${modDirVersion}/build
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# !!! No documentation on how much of the source tree must be kept
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# If/when kernel builds fail due to missing files, you can add
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# them here. Note that we may see packages requiring headers
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# from drivers/ in the future; it adds 50M to keep all of its
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# headers on 3.10 though.
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chmod u+w -R ../source
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arch=`cd $dev/lib/modules/${modDirVersion}/build/arch; ls`
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# Remove unusued arches
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mv arch/$arch .
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rm -fR arch
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mkdir arch
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mv $arch arch
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# Remove all driver-specific code (50M of which is headers)
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rm -fR drivers
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# Keep all headers
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find . -type f -name '*.h' -print0 | xargs -0 chmod u-w
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# Keep root and arch-specific Makefiles
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chmod u-w Makefile
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chmod u-w arch/$arch/Makefile*
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# Keep whole scripts dir
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chmod u-w -R scripts
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# Delete everything not kept
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find . -type f -perm -u=w -print0 | xargs -0 rm
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# Delete empty directories
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find -empty -type d -delete
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# Remove reference to kmod
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sed -i Makefile -e 's|= ${kmod}/bin/depmod|= depmod|'
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'' else optionalString installsFirmware ''
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make firmware_install $makeFlags "''${makeFlagsArray[@]}" \
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$installFlags "''${installFlagsArray[@]}"
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'');
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requiredSystemFeatures = [ "big-parallel" ];
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meta = {
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description =
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"The Linux kernel" +
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(if kernelPatches == [] then "" else
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" (with patches: "
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+ stdenv.lib.concatStrings (stdenv.lib.intersperse ", " (map (x: x.name) kernelPatches))
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+ ")");
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license = stdenv.lib.licenses.gpl2;
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homepage = http://www.kernel.org/;
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repositories.git = https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable.git;
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maintainers = [
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maintainers.thoughtpolice
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];
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platforms = platforms.linux;
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};
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};
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in
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stdenv.mkDerivation ((drvAttrs config stdenv.platform (kernelPatches ++ nativeKernelPatches) configfile) // {
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name = "linux-${version}";
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enableParallelBuilding = true;
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nativeBuildInputs = [ perl bc nettools openssl gmp libmpc mpfr ] ++ optional (stdenv.platform.uboot != null)
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(ubootChooser stdenv.platform.uboot);
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hardeningDisable = [ "bindnow" "format" "fortify" "stackprotector" "pic" ];
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makeFlags = commonMakeFlags ++ [
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"ARCH=${stdenv.platform.kernelArch}"
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];
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karch = stdenv.platform.kernelArch;
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crossAttrs = let cp = stdenv.cross.platform; in
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(drvAttrs crossConfig cp (kernelPatches ++ crossKernelPatches) crossConfigfile) // {
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makeFlags = commonMakeFlags ++ [
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"ARCH=${cp.kernelArch}"
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"CROSS_COMPILE=$(crossConfig)-"
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];
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karch = cp.kernelArch;
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# !!! uboot has messed up cross-compiling, nativeDrv builds arm tools on x86,
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# crossDrv builds x86 tools on x86 (but arm uboot). If this is fixed, uboot
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# can just go into buildInputs (but not nativeBuildInputs since cp.uboot
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# may be different from stdenv.platform.uboot)
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buildInputs = optional (cp.uboot != null) (ubootChooser cp.uboot).crossDrv;
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};
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})
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