8cead61740
this makes it possible for devices to stash things in `config` (e.g. pathname to DTS) that can later be overwritten (even by the end user)
94 lines
2.8 KiB
Nix
94 lines
2.8 KiB
Nix
{ stdenv
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, buildPackages
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, runCommand
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, writeText
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, lib
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, config
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, src
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, extraPatchPhase ? "echo"
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} :
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let writeConfig = name : config: writeText name
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(builtins.concatStringsSep
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"\n"
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(lib.mapAttrsToList
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(name: value: (if value == "n" then "# CONFIG_${name} is not set" else "CONFIG_${name}=${value}"))
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config
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));
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kconfigFile = writeConfig "kconfig" config;
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inherit lib; in
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stdenv.mkDerivation rec {
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name = "kernel";
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inherit src extraPatchPhase;
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hardeningDisable = ["all"];
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nativeBuildInputs = [buildPackages.stdenv.cc] ++
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(with buildPackages.pkgs;
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[rsync bc bison flex pkgconfig openssl ncurses.all perl]);
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CC = "${stdenv.cc.bintools.targetPrefix}gcc";
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HOSTCC = with buildPackages.pkgs;
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"gcc -I${openssl}/include -I${ncurses}/include";
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HOST_EXTRACFLAGS = 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 = "mips"; # kernel uses "mips" here for both mips and mipsel
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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 = ["out" "headers"];
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phases = [
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"unpackPhase"
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"butcherPkgconfig"
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"extraPatchPhase"
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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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# 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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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' ${kconfigFile} |sort) <(grep 'CONFIG' .config|sort) |grep '.' ; then
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echo -e "^^^ Some configuration lost :-(\nPerhaps you have mutually incompatible settings, or have disabled options on which these depend.\n"
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exit 0
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fi
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echo "OK"
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'';
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buildPhase = ''
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make vmlinux modules_prepare
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'';
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installPhase = ''
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${CROSS_COMPILE}strip -d vmlinux
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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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'';
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}
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