Daniel Barlow
7e2b0068e6
There is nothing in this commit except for the changes made by nix-shell -p nixfmt-rfc-style --run "nixfmt ." If this has mucked up your open branches then sorry about that. You can probably nixfmt them to match before merging
124 lines
3.3 KiB
Nix
124 lines
3.3 KiB
Nix
{
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stdenv,
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buildPackages,
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writeText,
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lib,
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config,
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src,
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version ? "0",
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extraPatchPhase ? "echo",
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targets ? [ "vmlinux" ],
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}:
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let
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writeConfig = import ./write-kconfig.nix { inherit lib writeText; };
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kconfigFile = writeConfig "kconfig" config;
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arch = stdenv.hostPlatform.linuxArch;
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targetNames = map baseNameOf targets;
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inherit lib;
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in
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stdenv.mkDerivation rec {
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name = "kernel";
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inherit src extraPatchPhase;
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hardeningDisable = [ "all" ];
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nativeBuildInputs =
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[ buildPackages.stdenv.cc ]
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++ (with buildPackages.pkgs; [
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rsync
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bc
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bison
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flex
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pkg-config
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openssl
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ncurses.all
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perl
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]);
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CC = "${stdenv.cc.bintools.targetPrefix}gcc";
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HOSTCC = with buildPackages.pkgs; "gcc -I${openssl}/include -I${ncurses}/include";
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HOST_EXTRACFLAGS =
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with buildPackages.pkgs;
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"-I${openssl.dev}/include -L${openssl.out}/lib -L${ncurses.out}/lib";
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PKG_CONFIG_PATH = "./pkgconfig";
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CROSS_COMPILE = stdenv.cc.bintools.targetPrefix;
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ARCH = arch;
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KBUILD_BUILD_HOST = "liminix.builder";
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dontStrip = true;
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dontPatchELF = true;
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outputs = [
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"out"
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"headers"
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"modulesupport"
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"config"
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] ++ targetNames;
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phases = [
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"unpackPhase"
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"butcherPkgconfig"
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"extraPatchPhase"
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"patchPhase"
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"patchScripts"
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"configurePhase"
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"checkConfigurationPhase"
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"buildPhase"
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"installPhase"
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];
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patches = [
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./cmdline-cookie.patch
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./mips-malta-fdt-from-bootloader.patch
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] ++ lib.optional (lib.versionOlder version "5.18.0") ./phram-allow-cached-mappings.patch;
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# this is here to work around what I think is a bug in nixpkgs
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# packaging of ncurses: it installs pkg-config data files which
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# don't produce any -L options when queried with "pkg-config --lib
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# ncurses". For a regular build you'll never even notice, this only
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# becomes an issue if you do a nix-shell in this derivation and
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# expect "make nconfig" to work.
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butcherPkgconfig = ''
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cp -r ${buildPackages.pkgs.ncurses.dev}/lib/pkgconfig .
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chmod +w pkgconfig pkgconfig/*.pc
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for i in pkgconfig/*.pc; do test -f $i && sed -i 's/^Libs:/Libs: -L''${libdir} /' $i;done
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'';
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patchScripts = ''
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# Make kexec pass dtb in register when invoking new kernel. The
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# code to do this is already present, but bracketed by UHI_BOOT
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# which we can't enable.
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sed -i arch/mips/kernel/machine_kexec.c -e 's/CONFIG_UHI_BOOT/CONFIG_MIPS/g'
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patchShebangs scripts/
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'';
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configurePhase = ''
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export KBUILD_OUTPUT=`pwd`
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cp ${kconfigFile} .config
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cp ${kconfigFile} .config.orig
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make V=1 olddefconfig
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'';
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checkConfigurationPhase = ''
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echo Checking required config items:
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if comm -2 -3 <(grep 'CONFIG' ${kconfigFile} |sort) <(grep 'CONFIG' .config|sort) |grep '.' ; then
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echo -e "^^^ Some configuration lost :-(\nPerhaps you have mutually incompatible settings, or have disabled options on which these depend.\n"
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exit 0
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fi
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echo "OK"
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'';
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buildPhase = ''
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make ${lib.concatStringsSep " " targetNames} modules_prepare -j$NIX_BUILD_CORES
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'';
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installPhase = ''
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${CROSS_COMPILE}strip -d vmlinux
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${lib.concatStringsSep "\n" (map (f: "cp ${f} \$${baseNameOf f}") targets)}
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cp vmlinux $out
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mkdir -p $headers
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cp -a include .config $headers/
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mkdir -p $modulesupport
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make modules
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cp -a . $modulesupport
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cp .config $config
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'';
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}
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