forked from mirrors/nixpkgs
a3a6ad7a01
crossOverlays only apply to the packages being built, not the build packages. It is useful when you don’t care what is used to build your packages, just what is being built. The idea relies heavily on the cross compiling infrastructure. Using this implies that we need to create a cross stdenv.
170 lines
4.1 KiB
Nix
170 lines
4.1 KiB
Nix
{ lib
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, localSystem, crossSystem, config, overlays
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}:
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assert crossSystem == localSystem;
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let
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inherit (localSystem) system;
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shell =
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if system == "i686-freebsd" || system == "x86_64-freebsd" then "/usr/local/bin/bash"
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else "/bin/bash";
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path =
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(if system == "i686-solaris" then [ "/usr/gnu" ] else []) ++
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(if system == "i686-netbsd" then [ "/usr/pkg" ] else []) ++
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(if system == "x86_64-solaris" then [ "/opt/local/gnu" ] else []) ++
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["/" "/usr" "/usr/local"];
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prehookBase = ''
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# Disable purity tests; it's allowed (even needed) to link to
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# libraries outside the Nix store (like the C library).
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export NIX_ENFORCE_PURITY=
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export NIX_ENFORCE_NO_NATIVE="''${NIX_ENFORCE_NO_NATIVE-1}"
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'';
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prehookFreeBSD = ''
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${prehookBase}
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alias make=gmake
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alias tar=gtar
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alias sed=gsed
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export MAKE=gmake
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shopt -s expand_aliases
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'';
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prehookOpenBSD = ''
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${prehookBase}
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alias make=gmake
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alias grep=ggrep
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alias mv=gmv
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alias ln=gln
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alias sed=gsed
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alias tar=gtar
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export MAKE=gmake
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shopt -s expand_aliases
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'';
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prehookNetBSD = ''
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${prehookBase}
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alias make=gmake
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alias sed=gsed
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alias tar=gtar
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export MAKE=gmake
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shopt -s expand_aliases
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'';
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# prevent libtool from failing to find dynamic libraries
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prehookCygwin = ''
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${prehookBase}
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shopt -s expand_aliases
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export lt_cv_deplibs_check_method=pass_all
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'';
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extraNativeBuildInputsCygwin = [
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../cygwin/all-buildinputs-as-runtimedep.sh
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../cygwin/wrap-exes-to-find-dlls.sh
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] ++ (if system == "i686-cygwin" then [
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../cygwin/rebase-i686.sh
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] else if system == "x86_64-cygwin" then [
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../cygwin/rebase-x86_64.sh
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] else []);
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# A function that builds a "native" stdenv (one that uses tools in
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# /usr etc.).
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makeStdenv =
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{ cc, fetchurl, extraPath ? [], overrides ? (self: super: { }) }:
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import ../generic {
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buildPlatform = localSystem;
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hostPlatform = localSystem;
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targetPlatform = localSystem;
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preHook =
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if system == "i686-freebsd" then prehookFreeBSD else
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if system == "x86_64-freebsd" then prehookFreeBSD else
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if system == "i686-openbsd" then prehookOpenBSD else
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if system == "i686-netbsd" then prehookNetBSD else
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if system == "i686-cygwin" then prehookCygwin else
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if system == "x86_64-cygwin" then prehookCygwin else
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prehookBase;
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extraNativeBuildInputs =
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if system == "i686-cygwin" then extraNativeBuildInputsCygwin else
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if system == "x86_64-cygwin" then extraNativeBuildInputsCygwin else
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[];
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initialPath = extraPath ++ path;
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fetchurlBoot = fetchurl;
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inherit shell cc overrides config;
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};
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in
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[
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({}: rec {
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__raw = true;
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stdenv = makeStdenv {
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cc = null;
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fetchurl = null;
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};
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stdenvNoCC = stdenv;
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cc = let
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nativePrefix = { # switch
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"i686-solaris" = "/usr/gnu";
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"x86_64-solaris" = "/opt/local/gcc47";
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}.${system} or "/usr";
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in
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import ../../build-support/cc-wrapper {
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name = "cc-native";
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nativeTools = true;
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nativeLibc = true;
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inherit nativePrefix;
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bintools = import ../../build-support/bintools-wrapper {
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name = "bintools";
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inherit stdenvNoCC nativePrefix;
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nativeTools = true;
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nativeLibc = true;
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};
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inherit stdenvNoCC;
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};
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fetchurl = import ../../build-support/fetchurl {
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inherit lib stdenvNoCC;
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# Curl should be in /usr/bin or so.
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curl = null;
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};
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})
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# First build a stdenv based only on tools outside the store.
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(prevStage: {
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inherit config overlays;
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stdenv = makeStdenv {
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inherit (prevStage) cc fetchurl;
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} // { inherit (prevStage) fetchurl; };
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})
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# Using that, build a stdenv that adds the ‘xz’ command (which most systems
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# don't have, so we mustn't rely on the native environment providing it).
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(prevStage: {
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inherit config overlays;
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stdenv = makeStdenv {
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inherit (prevStage.stdenv) cc fetchurl;
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extraPath = [ prevStage.xz ];
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overrides = self: super: { inherit (prevStage) xz; };
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};
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})
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]
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