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linux-headers: Fix Darwin cross build

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Carefully fake cc-version and cc-fullversion to avoid needing a compiler
for the kernel itself to build the headers.

For some reason, doing `make install_headers` twice, first without
INSTALL_HDR_PATH=$out then with, is neccessary to get this to work.
This commit is contained in:
Daiderd Jordan
2018-01-26 23:40:40 +01:00
committed by John Ericson
parent 88cd633ea4
commit ab6bbdd5cd
4 changed files with 82 additions and 7 deletions
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56
pkgs/os-specific/linux/kernel-headers/default.nix
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@@ -1,9 +1,10 @@
{ stdenvNoCC, lib, buildPackages
, fetchurl, perl
, fetchurl, fetchpatch, perl
, elf-header
}:
let
common = { version, sha256, patches ? null }: stdenvNoCC.mkDerivation {
common = { version, sha256, patches ? [] }: stdenvNoCC.mkDerivation ({
name = "linux-headers-${version}";
src = fetchurl {
@@ -16,7 +17,10 @@ let
# 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 ];
nativeBuildInputs = [ perl ];
# TODO make unconditional next mass rebuild
nativeBuildInputs = [ perl ] ++ lib.optional
(stdenvNoCC.hostPlatform != stdenvNoCC.buildPlatform)
elf-header;
extraIncludeDirs = lib.optional stdenvNoCC.hostPlatform.isPowerPC ["ppc"];
@@ -24,12 +28,44 @@ let
# and causing mass rebuild
inherit patches;
buildPhase = ''
# TODO avoid native hack next rebuild
makeFlags = if stdenvNoCC.hostPlatform == stdenvNoCC.buildPlatform then null else [
"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)"
];
# TODO avoid native hack next rebuild
# Skip clean on darwin, case-sensitivity issues.
buildPhase = if stdenvNoCC.hostPlatform == stdenvNoCC.buildPlatform then ''
make mrproper headers_check SHELL=bash
'' else 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
'';
installPhase = ''
# TODO avoid native hack next rebuild
checkPhase = if stdenvNoCC.hostPlatform == stdenvNoCC.buildPlatform then null else ''
make headers_check $makeFlags
'';
# TODO avoid native hack next rebuild
installPhase = (if stdenvNoCC.hostPlatform == stdenvNoCC.buildPlatform then ''
make INSTALL_HDR_PATH=$out headers_install
'' else ''
make headers_install INSTALL_HDR_PATH=$out $makeFlags
'') + ''
# Some builds (e.g. KVM) want a kernel.release.
mkdir -p $out/include/config
@@ -41,11 +77,19 @@ let
license = licenses.gpl2;
platforms = platforms.linux;
};
};
} // lib.optionalAttrs (stdenvNoCC.hostPlatform != stdenvNoCC.buildPlatform) {
# TODO Make unconditional next mass rebuild
hardeningDisable = lib.optional stdenvNoCC.buildPlatform.isDarwin "format";
});
in {
linuxHeaders = common {
version = "4.15";
sha256 = "0sd7l9n9h7vf9c6gd6ciji28hawda60yj0llh17my06m0s4lf9js";
# TODO make unconditional next mass rebuild
patches = lib.optionals (stdenvNoCC.hostPlatform != stdenvNoCC.buildPlatform) [
./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
];
};
}