nixpkgs/pkgs/os-specific/linux/kernel/generic.nix
Eelco Dolstra a2cbc77e4f Only show/build a package on the platforms listed in meta.platforms
The function ‘mkDerivation’ now checks whether the current platform
type is included in a package's meta.platform field.  If not, it
throws an exception:

  $ nix-build -A linux --argstr system x86_64-darwin
  error: user-thrown exception: the package ‘linux-3.10.15’ is not supported on ‘x86_64-darwin’

These packages also no longer show up in ‘nix-env -qa’ output.  This
means, for instance, that the number of packages shown on
x86_64-freebsd has dropped from 9268 to 4764.

Since meta.platforms was also used to prevent Hydra from building some
packages, there now is a new attribute meta.hydraPlatforms listing the
platforms on which Hydra should build the package (which defaults to
meta.platforms).
2013-11-05 00:06:10 +01:00

145 lines
4.2 KiB
Nix

{ stdenv, fetchurl, perl, mktemp, kmod, bc
, # The kernel source tarball.
src
, # The kernel version.
version
, # Overrides to the kernel config.
extraConfig ? ""
, # The version number used for the module directory
modDirVersion ? version
, # An attribute set whose attributes express the availability of
# certain features in this kernel. E.g. `{iwlwifi = true;}'
# indicates a kernel that provides Intel wireless support. Used in
# NixOS to implement kernel-specific behaviour.
features ? {}
, # A list of patches to apply to the kernel. Each element of this list
# should be an attribute set {name, patch} where `name' is a
# symbolic name and `patch' is the actual patch. The patch may
# optionally be compressed with gzip or bzip2.
kernelPatches ? []
, # Allows you to set your own kernel version suffix (e.g.,
# "-my-kernel").
localVersion ? ""
, preConfigure ? ""
, extraMeta ? {}
, ubootChooser ? null
, postInstall ? ""
, # After the builder did a 'make all' (kernel + modules)
# we force building the target asked: bzImage/zImage/uImage/...
postBuild ? "make $makeFlags $kernelTarget; make $makeFlags -C scripts unifdef"
, ...
}:
assert stdenv.platform.name == "sheevaplug" -> stdenv.platform.uboot != null;
let
lib = stdenv.lib;
kernelConfigFun = baseConfig:
let
configFromPatches =
map ({extraConfig ? "", ...}: extraConfig) kernelPatches;
in lib.concatStringsSep "\n" ([baseConfig] ++ configFromPatches);
configWithPlatform = kernelPlatform:
import ./common-config.nix { inherit stdenv version kernelPlatform extraConfig; };
config = configWithPlatform stdenv.platform;
configCross = configWithPlatform stdenv.cross.platform;
in
stdenv.mkDerivation {
name = "linux-${version}";
enableParallelBuilding = true;
passthru = {
inherit version modDirVersion kernelPatches;
# Combine the `features' attribute sets of all the kernel patches.
features = lib.fold (x: y: (x.features or {}) // y) features kernelPatches;
};
builder = ./builder.sh;
generateConfig = ./generate-config.pl;
inherit preConfigure src kmod localVersion postInstall postBuild;
patches = map (p: p.patch) kernelPatches;
kernelConfig = kernelConfigFun config;
# For UML and non-PC, just ignore all options that don't apply (We are lazy).
ignoreConfigErrors = stdenv.platform.name != "pc";
nativeBuildInputs = [ perl mktemp bc ];
buildInputs = lib.optional (stdenv.platform.uboot != null)
(ubootChooser stdenv.platform.uboot);
platformName = stdenv.platform.name;
kernelBaseConfig = stdenv.platform.kernelBaseConfig;
kernelTarget = stdenv.platform.kernelTarget;
autoModules = stdenv.platform.kernelAutoModules;
# Should we trust platform.kernelArch? We can only do
# that once we differentiate i686/x86_64 in platforms.
arch =
if stdenv.system == "i686-linux" then "i386" else
if stdenv.system == "x86_64-linux" then "x86_64" else
if stdenv.isArm then "arm" else
if stdenv.system == "mips64el-linux" then "mips" else
abort "Platform ${stdenv.system} is not supported.";
crossAttrs = let
cp = stdenv.cross.platform;
in
assert cp.name == "sheevaplug" -> cp.uboot != null;
{
arch = cp.kernelArch;
platformName = cp.name;
kernelBaseConfig = cp.kernelBaseConfig;
kernelTarget = cp.kernelTarget;
autoModules = cp.kernelAutoModules;
# Just ignore all options that don't apply (We are lazy).
ignoreConfigErrors = true;
kernelConfig = kernelConfigFun configCross;
# The substitution of crossAttrs happens *after* the stdenv cross adapter sets
# the parameters for the usual stdenv. Thus, we need to specify
# the ".crossDrv" in the buildInputs here.
buildInputs = lib.optional (cp.uboot != null) (ubootChooser cp.uboot).crossDrv;
};
meta = {
description =
"The Linux kernel" +
(if kernelPatches == [] then "" else
" (with patches: "
+ lib.concatStrings (lib.intersperse ", " (map (x: x.name) kernelPatches))
+ ")");
license = "GPLv2";
homepage = http://www.kernel.org/;
maintainers = [
lib.maintainers.eelco
lib.maintainers.chaoflow
];
platforms = lib.platforms.linux;
} // extraMeta;
}