Merge pull request #129806 from lovesegfault/kernel-extra-build-flags
linux: groundwork to enable LLVM/LTO builds
This commit is contained in:
commit
91ffffd904
3 changed files with 26 additions and 13 deletions
pkgs/os-specific/linux/kernel
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@ -19,6 +19,7 @@ my $autoModules = $ENV{'AUTO_MODULES'};
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my $preferBuiltin = $ENV{'PREFER_BUILTIN'};
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my $ignoreConfigErrors = $ENV{'ignoreConfigErrors'};
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my $buildRoot = $ENV{'BUILD_ROOT'};
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my $makeFlags = $ENV{'MAKE_FLAGS'};
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$SIG{PIPE} = 'IGNORE';
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# Read the answers.
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@ -40,7 +41,7 @@ close ANSWERS;
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sub runConfig {
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# Run `make config'.
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my $pid = open2(\*IN, \*OUT, "make -C $ENV{SRC} O=$buildRoot config SHELL=bash ARCH=$ENV{ARCH} CC=$ENV{CC} HOSTCC=$ENV{HOSTCC} HOSTCXX=$ENV{HOSTCXX}");
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my $pid = open2(\*IN, \*OUT, "make -C $ENV{SRC} O=$buildRoot config SHELL=bash ARCH=$ENV{ARCH} CC=$ENV{CC} HOSTCC=$ENV{HOSTCC} HOSTCXX=$ENV{HOSTCXX} $makeFlags");
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# Parse the output, look for questions and then send an
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# appropriate answer.
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@ -21,6 +21,9 @@
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, # Legacy overrides to the intermediate kernel config, as string
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extraConfig ? ""
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# Additional make flags passed to kbuild
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, extraMakeFlags ? []
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, # kernel intermediate config overrides, as a set
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structuredExtraConfig ? {}
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@ -97,7 +100,7 @@ let
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in lib.concatStringsSep "\n" ([baseConfigStr] ++ configFromPatches);
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configfile = stdenv.mkDerivation {
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inherit ignoreConfigErrors autoModules preferBuiltin kernelArch;
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inherit ignoreConfigErrors autoModules preferBuiltin kernelArch extraMakeFlags;
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pname = "linux-config";
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inherit version;
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@ -116,6 +119,9 @@ let
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# e.g. "bzImage"
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kernelTarget = stdenv.hostPlatform.linux-kernel.target;
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makeFlags = lib.optionals (stdenv.hostPlatform.linux-kernel ? makeFlags) stdenv.hostPlatform.linux-kernel.makeFlags
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++ extraMakeFlags;
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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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@ -134,16 +140,19 @@ let
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export HOSTLD=$LD_FOR_BUILD
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# Get a basic config file for later refinement with $generateConfig.
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make -C . O="$buildRoot" $kernelBaseConfig \
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make $makeFlags \
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-C . O="$buildRoot" $kernelBaseConfig \
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ARCH=$kernelArch \
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HOSTCC=$HOSTCC HOSTCXX=$HOSTCXX HOSTAR=$HOSTAR HOSTLD=$HOSTLD \
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CC=$CC OBJCOPY=$OBJCOPY OBJDUMP=$OBJDUMP READELF=$READELF
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CC=$CC OBJCOPY=$OBJCOPY OBJDUMP=$OBJDUMP READELF=$READELF \
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$makeFlags
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# Create the config file.
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echo "generating kernel configuration..."
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ln -s "$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 $generateConfig
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PREFER_BUILTIN=$preferBuiltin BUILD_ROOT="$buildRoot" SRC=. MAKE_FLAGS="$makeFlags" \
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perl -w $generateConfig
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'';
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installPhase = "mv $buildRoot/.config $out";
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@ -151,7 +160,6 @@ let
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enableParallelBuilding = true;
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passthru = rec {
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module = import ../../../../nixos/modules/system/boot/kernel_config.nix;
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# used also in apache
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# { modules = [ { options = res.options; config = svc.config or svc; } ];
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@ -172,14 +180,14 @@ let
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}; # end of configfile derivation
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kernel = (callPackage ./manual-config.nix {}) {
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inherit version modDirVersion src kernelPatches randstructSeed lib stdenv extraMeta configfile;
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inherit version modDirVersion src kernelPatches randstructSeed lib stdenv extraMakeFlags extraMeta configfile;
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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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inherit commonStructuredConfig isZen isHardened isLibre modDirVersion;
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inherit commonStructuredConfig structuredExtraConfig extraMakeFlags isZen isHardened isLibre modDirVersion;
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isXen = lib.warn "The isXen attribute is deprecated. All Nixpkgs kernels that support it now have Xen enabled." true;
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kernelOlder = lib.versionOlder version;
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kernelAtLeast = lib.versionAtLeast version;
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@ -1,5 +1,5 @@
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{ lib, buildPackages, runCommand, nettools, bc, bison, flex, perl, rsync, gmp, libmpc, mpfr, openssl
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, libelf, cpio, elfutils, zstd, gawk
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, libelf, cpio, elfutils, zstd, gawk, python3Minimal
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, writeTextFile
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}:
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@ -19,6 +19,8 @@ in {
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stdenv,
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# The kernel version
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version,
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# Additional kernel make flags
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extraMakeFlags ? [],
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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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@ -121,7 +123,7 @@ let
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# See also https://kernelnewbies.org/BuildId
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sed -i Makefile -e 's|--build-id=[^ ]*|--build-id=none|'
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patchShebangs scripts/ld-version.sh
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patchShebangs scripts
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'';
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postPatch = ''
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@ -173,7 +175,9 @@ let
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"KBUILD_BUILD_VERSION=1-NixOS"
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kernelConf.target
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"vmlinux" # for "perf" and things like that
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] ++ optional isModular "modules";
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]
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++ optional isModular "modules"
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++ extraMakeFlags;
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installFlags = [
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"INSTALLKERNEL=${installkernel}"
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@ -307,7 +311,7 @@ stdenv.mkDerivation ((drvAttrs config stdenv.hostPlatform.linux-kernel kernelPat
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enableParallelBuilding = true;
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depsBuildBuild = [ buildPackages.stdenv.cc ];
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nativeBuildInputs = [ perl bc nettools openssl rsync gmp libmpc mpfr gawk zstd ]
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nativeBuildInputs = [ perl bc nettools openssl rsync gmp libmpc mpfr gawk zstd python3Minimal ]
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++ optional (stdenv.hostPlatform.linux-kernel.target == "uImage") buildPackages.ubootTools
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++ optional (lib.versionAtLeast version "4.14" && lib.versionOlder version "5.8") libelf
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# Removed util-linuxMinimal since it should not be a dependency.
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@ -325,7 +329,7 @@ stdenv.mkDerivation ((drvAttrs config stdenv.hostPlatform.linux-kernel kernelPat
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"ARCH=${stdenv.hostPlatform.linuxArch}"
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] ++ lib.optional (stdenv.hostPlatform != stdenv.buildPlatform) [
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"CROSS_COMPILE=${stdenv.cc.targetPrefix}"
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];
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] ++ extraMakeFlags;
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karch = stdenv.hostPlatform.linuxArch;
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})
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