pyrox.dev
linuxHeaders: fix cross-compilation from darwin to mips
mips tools require endian headers which are different on darwin.
Add stub headers to define the appropriate byte swap functions.
Co-authored-by: Adam Joseph <54836058+amjoseph-nixpkgs@users.noreply.github.com>
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pkgs/os-specific/linux/kernel-headers/default.nix
+30
pkgs/os-specific/linux/kernel-headers/default.nix
···
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{ stdenvNoCC, lib, buildPackages, fetchurl, perl, elf-header
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, bison ? null, flex ? null, python ? null, rsync ? null
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, writeTextFile
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}:
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assert stdenvNoCC.hostPlatform.isAndroid ->
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(flex != null && bison != null && python != null && rsync != null);
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let
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# As part of building a hostPlatform=mips kernel, Linux creates and runs a
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# tiny utility `arch/mips/boot/tools/relocs_main.c` for the buildPlatform.
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# This utility references a glibc-specific header `byteswap.h`. There is a
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# compatibility header in gnulib for most BSDs, but not for Darwin, so we
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# synthesize one here.
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darwin-endian-h = writeTextFile {
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name = "endian-h";
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text = ''
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#include <byteswap.h>
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'';
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destination = "/include/endian.h";
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};
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darwin-byteswap-h = writeTextFile {
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name = "byteswap-h";
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text = ''
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#pragma once
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#include <libkern/OSByteOrder.h>
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#define bswap_16 OSSwapInt16
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#define bswap_32 OSSwapInt32
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#define bswap_64 OSSwapInt64
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'';
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destination = "/include/byteswap.h";
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};
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makeLinuxHeaders = { src, version, patches ? [] }: stdenvNoCC.mkDerivation {
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inherit src;
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···
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perl elf-header
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] ++ lib.optionals stdenvNoCC.hostPlatform.isAndroid [
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flex bison python rsync
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] ++ lib.optionals (stdenvNoCC.buildPlatform.isDarwin &&
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stdenvNoCC.hostPlatform.isMips) [
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darwin-endian-h
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darwin-byteswap-h
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];
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extraIncludeDirs = lib.optional (with stdenvNoCC.hostPlatform; isPower && is32bit && isBigEndian) ["ppc"];