nixpkgs/pkgs/os-specific/linux/kernel-headers/default.nix
Matthew Bauer d8934feba1 kernel-headers: infer ARCH from config triple
This makes us less reliant on the systems/examples.nix. You should be
able to cross compile with just your triple:

$ nix build --arg crossSystem '{ config = "armv6l-unknown-linux-gnueabi"; }' stdenv
2019-04-19 14:53:48 -04:00

86 lines
2.6 KiB
Nix

{ stdenvNoCC, lib, buildPackages
, fetchurl, fetchpatch, perl
, elf-header
}:
let
common = { version, sha256, patches ? [] }: stdenvNoCC.mkDerivation {
name = "linux-headers-${version}";
src = fetchurl {
url = "mirror://kernel/linux/kernel/v4.x/linux-${version}.tar.xz";
inherit sha256;
};
ARCH = stdenvNoCC.hostPlatform.platform.kernelArch or stdenvNoCC.hostPlatform.kernelArch;
# It may look odd that we use `stdenvNoCC`, and yet explicit depend on a cc.
# We do this so we have a build->build, not build->host, C compiler.
depsBuildBuild = [ buildPackages.stdenv.cc ];
# `elf-header` is null when libc provides `elf.h`.
nativeBuildInputs = [ perl elf-header ];
extraIncludeDirs = lib.optional stdenvNoCC.hostPlatform.isPowerPC ["ppc"];
inherit patches;
hardeningDisable = lib.optional stdenvNoCC.buildPlatform.isDarwin "format";
makeFlags = [
"SHELL=bash"
# Avoid use of runtime build->host compilers for checks. These
# checks only cared to work around bugs in very old compilers, so
# these changes should be safe.
"cc-version:=9999"
"cc-fullversion:=999999"
# `$(..)` expanded by make alone
"HOSTCC:=$(BUILD_CC)"
"HOSTCXX:=$(BUILD_CXX)"
];
# Skip clean on darwin, case-sensitivity issues.
buildPhase = lib.optionalString (!stdenvNoCC.buildPlatform.isDarwin) ''
make mrproper $makeFlags
''
# For some reason, doing `make install_headers` twice, first without
# INSTALL_HDR_PATH=$out then with, is neccessary to get this to work
# for darwin cross. @Ericson2314 has no idea why.
+ ''
make headers_install $makeFlags
'';
checkPhase = ''
make headers_check $makeFlags
'';
installPhase = ''
make headers_install INSTALL_HDR_PATH=$out $makeFlags
''
# Some builds (e.g. KVM) want a kernel.release.
+ '' mkdir -p $out/include/config
echo "${version}-default" > $out/include/config/kernel.release
''
# These oddly named file records teh `SHELL` passed, which causes bootstrap
# tools run-time dependency.
+ ''
find "$out" -name '..install.cmd' -print0 | xargs -0 rm
'';
meta = with lib; {
description = "Header files and scripts for Linux kernel";
license = licenses.gpl2;
platforms = platforms.linux;
};
};
in {
linuxHeaders = common {
version = "4.19.16";
sha256 = "1pqvn6dsh0xhdpawz4ag27vkw1abvb6sn3869i4fbrz33ww8i86q";
patches = [
./no-relocs.patch # for building x86 kernel headers on non-ELF platforms
./no-dynamic-cc-version-check.patch # so we can use `stdenvNoCC`, see `makeFlags` above
];
};
}