{ stdenvNoCC, lib, buildPackages, fetchurl, perl, elf-header , bison, flex, rsync , writeTextFile }: let # As part of building a hostPlatform=mips kernel, Linux creates and runs a # tiny utility `arch/mips/boot/tools/relocs_main.c` for the buildPlatform. # This utility references a glibc-specific header `byteswap.h`. There is a # compatibility header in gnulib for most BSDs, but not for Darwin, so we # synthesize one here. darwin-endian-h = writeTextFile { name = "endian-h"; text = '' #include <byteswap.h> ''; destination = "/include/endian.h"; }; darwin-byteswap-h = writeTextFile { name = "byteswap-h"; text = '' #pragma once #include <libkern/OSByteOrder.h> #define bswap_16 OSSwapInt16 #define bswap_32 OSSwapInt32 #define bswap_64 OSSwapInt64 ''; destination = "/include/byteswap.h"; }; makeLinuxHeaders = { src, version, patches ? [] }: stdenvNoCC.mkDerivation { inherit src; pname = "linux-headers"; inherit version; ARCH = stdenvNoCC.hostPlatform.linuxArch; strictDeps = true; enableParallelBuilding = true; # 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 ] ++ lib.optionals stdenvNoCC.hostPlatform.isAndroid [ bison flex rsync ] ++ lib.optionals (stdenvNoCC.buildPlatform.isDarwin && stdenvNoCC.hostPlatform.isMips) [ darwin-endian-h darwin-byteswap-h ]; extraIncludeDirs = lib.optionals (with stdenvNoCC.hostPlatform; isPower && is32bit && isBigEndian) ["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" # `$(..)` expanded by make alone "HOSTCC:=$(CC_FOR_BUILD)" "HOSTCXX:=$(CXX_FOR_BUILD)" ]; # Skip clean on darwin, case-sensitivity issues. buildPhase = lib.optionalString (!stdenvNoCC.buildPlatform.isDarwin) '' make mrproper $makeFlags '' + (if stdenvNoCC.hostPlatform.isAndroid then '' make defconfig make headers_install '' else '' make headers $makeFlags ''); checkPhase = '' make headers_check $makeFlags ''; # The following command requires rsync: # make headers_install INSTALL_HDR_PATH=$out $makeFlags # but rsync depends on popt which does not compile on aarch64 without # updateAutotoolsGnuConfigScriptsHook which is not enabled in stage2, # so we replicate it with cp. This also reduces bootstrap closure size. installPhase = '' mkdir -p $out cp -r usr/include $out find $out -type f ! -name '*.h' -delete '' # Some builds (e.g. KVM) want a kernel.release. + '' mkdir -p $out/include/config echo "${version}-default" > $out/include/config/kernel.release ''; meta = with lib; { description = "Header files and scripts for Linux kernel"; license = licenses.gpl2; platforms = platforms.linux; }; }; in { inherit makeLinuxHeaders; linuxHeaders = let version = "6.7"; in makeLinuxHeaders { inherit version; src = fetchurl { url = "mirror://kernel/linux/kernel/v${lib.versions.major version}.x/linux-${version}.tar.xz"; hash = "sha256-7zEUSiV20IDYwxaY6D7J9mv5fGd/oqrw1bu58zRbEGk="; }; patches = [ ./no-relocs.patch # for building x86 kernel headers on non-ELF platforms ]; }; }