nixpkgs/pkgs/stdenv/cross/default.nix
Matthew Bauer b86e62d30d llvm: support cross compilation with useLLVM flag
You can build (partially) with LLVM toolchain using the useLLVM flag.
This works like so:

  nix-build -A hello --arg crossSystem '{ system =
    "aarch64-unknown-linux-musl"; useLLVM = true }'

also don’t separate debug info in lldClang

It doesn’t work currently with that setup hook. Missing build-id?
2019-02-26 19:45:35 -05:00

76 lines
2.5 KiB
Nix

{ lib
, localSystem, crossSystem, config, overlays, crossOverlays ? []
}:
let
bootStages = import ../. {
inherit lib localSystem overlays;
crossSystem = localSystem;
crossOverlays = [];
# Ignore custom stdenvs when cross compiling for compatability
config = builtins.removeAttrs config [ "replaceStdenv" ];
};
in lib.init bootStages ++ [
# Regular native packages
(somePrevStage: lib.last bootStages somePrevStage // {
# It's OK to change the built-time dependencies
allowCustomOverrides = true;
})
# Build tool Packages
(vanillaPackages: {
inherit config overlays;
selfBuild = false;
stdenv =
assert vanillaPackages.stdenv.buildPlatform == localSystem;
assert vanillaPackages.stdenv.hostPlatform == localSystem;
assert vanillaPackages.stdenv.targetPlatform == localSystem;
vanillaPackages.stdenv.override { targetPlatform = crossSystem; };
# It's OK to change the built-time dependencies
allowCustomOverrides = true;
})
# Run Packages
(buildPackages: {
inherit config;
overlays = overlays ++ crossOverlays;
selfBuild = false;
stdenv = buildPackages.stdenv.override (old: rec {
buildPlatform = localSystem;
hostPlatform = crossSystem;
targetPlatform = crossSystem;
# Prior overrides are surely not valid as packages built with this run on
# a different platform, and so are disabled.
overrides = _: _: {};
extraBuildInputs = [ ]; # Old ones run on wrong platform
allowedRequisites = null;
cc = if crossSystem.useiOSPrebuilt or false
then buildPackages.darwin.iosSdkPkgs.clang
else if crossSystem.useAndroidPrebuilt or false
then buildPackages."androidndkPkgs_${crossSystem.ndkVer}".gcc
else if crossSystem.useLLVM or false
then buildPackages.llvmPackages_7.lldClang
else buildPackages.gcc;
extraNativeBuildInputs = old.extraNativeBuildInputs
++ lib.optionals
(hostPlatform.isLinux && !buildPlatform.isLinux)
[ buildPackages.patchelf ]
++ lib.optional
(let f = p: !p.isx86 || p.libc == "musl"; in f hostPlatform && !(f buildPlatform))
buildPackages.updateAutotoolsGnuConfigScriptsHook
# without proper `file` command, libtool sometimes fails
# to recognize 64-bit DLLs
++ lib.optional (hostPlatform.config == "x86_64-w64-mingw32") buildPackages.file
;
});
})
]