442 lines
16 KiB
Nix
442 lines
16 KiB
Nix
# This file constructs the standard build environment for the
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# Linux/i686 platform. It's completely pure; that is, it relies on no
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# external (non-Nix) tools, such as /usr/bin/gcc, and it contains a C
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# compiler and linker that do not search in default locations,
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# ensuring purity of components produced by it.
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{ lib
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, localSystem, crossSystem, config, overlays, crossOverlays ? []
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, bootstrapFiles ?
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let table = {
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glibc = {
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i686-linux = import ./bootstrap-files/i686.nix;
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x86_64-linux = import ./bootstrap-files/x86_64.nix;
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armv5tel-linux = import ./bootstrap-files/armv5tel.nix;
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armv6l-linux = import ./bootstrap-files/armv6l.nix;
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armv7l-linux = import ./bootstrap-files/armv7l.nix;
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aarch64-linux = import ./bootstrap-files/aarch64.nix;
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mipsel-linux = import ./bootstrap-files/loongson2f.nix;
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};
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musl = {
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aarch64-linux = import ./bootstrap-files/aarch64-musl.nix;
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armv6l-linux = import ./bootstrap-files/armv6l-musl.nix;
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x86_64-linux = import ./bootstrap-files/x86_64-musl.nix;
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};
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};
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# Try to find an architecture compatible with our current system. We
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# just try every bootstrap we’ve got and test to see if it is
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# compatible with or current architecture.
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getCompatibleTools = lib.foldl (v: system:
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if v != null then v
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else if localSystem.isCompatible (lib.systems.elaborate { inherit system; }) then archLookupTable.${system}
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else null) null (lib.attrNames archLookupTable);
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archLookupTable = table.${localSystem.libc}
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or (abort "unsupported libc for the pure Linux stdenv");
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files = archLookupTable.${localSystem.system} or (if getCompatibleTools != null then getCompatibleTools
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else (abort "unsupported platform for the pure Linux stdenv"));
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in files
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}:
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assert crossSystem == localSystem;
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let
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inherit (localSystem) system;
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commonPreHook =
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''
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export NIX_ENFORCE_PURITY="''${NIX_ENFORCE_PURITY-1}"
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export NIX_ENFORCE_NO_NATIVE="''${NIX_ENFORCE_NO_NATIVE-1}"
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${if system == "x86_64-linux" then "NIX_LIB64_IN_SELF_RPATH=1" else ""}
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${if system == "mipsel-linux" then "NIX_LIB32_IN_SELF_RPATH=1" else ""}
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'';
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# The bootstrap process proceeds in several steps.
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# Create a standard environment by downloading pre-built binaries of
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# coreutils, GCC, etc.
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# Download and unpack the bootstrap tools (coreutils, GCC, Glibc, ...).
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bootstrapTools = import (if localSystem.libc == "musl" then ./bootstrap-tools-musl else ./bootstrap-tools) {
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inherit system bootstrapFiles;
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extraAttrs = lib.optionalAttrs
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(config.contentAddressedByDefault or false)
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{
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__contentAddressed = true;
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outputHashAlgo = "sha256";
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outputHashMode = "recursive";
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};
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};
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getLibc = stage: stage.${localSystem.libc};
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# This function builds the various standard environments used during
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# the bootstrap. In all stages, we build an stdenv and the package
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# set that can be built with that stdenv.
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stageFun = prevStage:
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{ name, overrides ? (self: super: {}), extraNativeBuildInputs ? [] }:
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let
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thisStdenv = import ../generic {
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name = "${name}-stdenv-linux";
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buildPlatform = localSystem;
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hostPlatform = localSystem;
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targetPlatform = localSystem;
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inherit config extraNativeBuildInputs;
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preHook =
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''
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# Don't patch #!/interpreter because it leads to retained
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# dependencies on the bootstrapTools in the final stdenv.
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dontPatchShebangs=1
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${commonPreHook}
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'';
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shell = "${bootstrapTools}/bin/bash";
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initialPath = [bootstrapTools];
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fetchurlBoot = import ../../build-support/fetchurl/boot.nix {
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inherit system;
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};
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cc = if prevStage.gcc-unwrapped == null
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then null
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else lib.makeOverridable (import ../../build-support/cc-wrapper) {
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name = "${name}-gcc-wrapper";
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nativeTools = false;
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nativeLibc = false;
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buildPackages = lib.optionalAttrs (prevStage ? stdenv) {
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inherit (prevStage) stdenv;
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};
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cc = prevStage.gcc-unwrapped;
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bintools = prevStage.binutils;
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isGNU = true;
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libc = getLibc prevStage;
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inherit lib;
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inherit (prevStage) coreutils gnugrep;
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stdenvNoCC = prevStage.ccWrapperStdenv;
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};
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overrides = self: super: (overrides self super) // { fetchurl = thisStdenv.fetchurlBoot; };
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};
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in {
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inherit config overlays;
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stdenv = thisStdenv;
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};
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in
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[
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({}: {
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__raw = true;
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gcc-unwrapped = null;
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binutils = null;
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coreutils = null;
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gnugrep = null;
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})
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# Build a dummy stdenv with no GCC or working fetchurl. This is
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# because we need a stdenv to build the GCC wrapper and fetchurl.
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(prevStage: stageFun prevStage {
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name = "bootstrap-stage0";
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overrides = self: super: {
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# We thread stage0's stdenv through under this name so downstream stages
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# can use it for wrapping gcc too. This way, downstream stages don't need
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# to refer to this stage directly, which violates the principle that each
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# stage should only access the stage that came before it.
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ccWrapperStdenv = self.stdenv;
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# The Glibc include directory cannot have the same prefix as the
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# GCC include directory, since GCC gets confused otherwise (it
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# will search the Glibc headers before the GCC headers). So
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# create a dummy Glibc here, which will be used in the stdenv of
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# stage1.
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${localSystem.libc} = self.stdenv.mkDerivation {
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pname = "bootstrap-stage0-${localSystem.libc}";
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version = "bootstrap";
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buildCommand = ''
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mkdir -p $out
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ln -s ${bootstrapTools}/lib $out/lib
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'' + lib.optionalString (localSystem.libc == "glibc") ''
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ln -s ${bootstrapTools}/include-glibc $out/include
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'' + lib.optionalString (localSystem.libc == "musl") ''
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ln -s ${bootstrapTools}/include-libc $out/include
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'';
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};
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gcc-unwrapped = bootstrapTools;
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binutils = import ../../build-support/bintools-wrapper {
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name = "bootstrap-stage0-binutils-wrapper";
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nativeTools = false;
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nativeLibc = false;
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buildPackages = { };
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libc = getLibc self;
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inherit lib;
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inherit (self) stdenvNoCC coreutils gnugrep;
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bintools = bootstrapTools;
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};
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coreutils = bootstrapTools;
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gnugrep = bootstrapTools;
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};
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})
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# Create the first "real" standard environment. This one consists
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# of bootstrap tools only, and a minimal Glibc to keep the GCC
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# configure script happy.
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#
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# For clarity, we only use the previous stage when specifying these
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# stages. So stageN should only ever have references for stage{N-1}.
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#
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# If we ever need to use a package from more than one stage back, we
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# simply re-export those packages in the middle stage(s) using the
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# overrides attribute and the inherit syntax.
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(prevStage: stageFun prevStage {
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name = "bootstrap-stage1";
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# Rebuild binutils to use from stage2 onwards.
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overrides = self: super: {
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binutils-unwrapped = super.binutils-unwrapped.override {
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gold = false;
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};
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inherit (prevStage)
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ccWrapperStdenv
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gcc-unwrapped coreutils gnugrep;
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${localSystem.libc} = getLibc prevStage;
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# A threaded perl build needs glibc/libpthread_nonshared.a,
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# which is not included in bootstrapTools, so disable threading.
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# This is not an issue for the final stdenv, because this perl
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# won't be included in the final stdenv and won't be exported to
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# top-level pkgs as an override either.
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perl = super.perl.override { enableThreading = false; };
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};
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})
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# 2nd stdenv that contains our own rebuilt binutils and is used for
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# compiling our own Glibc.
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(prevStage: stageFun prevStage {
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name = "bootstrap-stage2";
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overrides = self: super: {
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inherit (prevStage)
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ccWrapperStdenv
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gcc-unwrapped coreutils gnugrep
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perl gnum4 bison;
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dejagnu = super.dejagnu.overrideAttrs (a: { doCheck = false; } );
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# We need libidn2 and its dependency libunistring as glibc dependency.
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# To avoid the cycle, we build against bootstrap libc, nuke references,
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# and use the result as input for our final glibc. We also pass this pair
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# through, so the final package-set uses exactly the same builds.
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libunistring = super.libunistring.overrideAttrs (attrs: {
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postFixup = attrs.postFixup or "" + ''
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${self.nukeReferences}/bin/nuke-refs "$out"/lib/lib*.so.*.*
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'';
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# Apparently iconv won't work with bootstrap glibc, but it will be used
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# with glibc built later where we keep *this* build of libunistring,
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# so we need to trick it into supporting libiconv.
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am_cv_func_iconv_works = "yes";
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});
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libidn2 = super.libidn2.overrideAttrs (attrs: {
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postFixup = attrs.postFixup or "" + ''
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${self.nukeReferences}/bin/nuke-refs -e '${lib.getLib self.libunistring}' \
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"$out"/lib/lib*.so.*.*
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'';
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});
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# This also contains the full, dynamically linked, final Glibc.
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binutils = prevStage.binutils.override {
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# Rewrap the binutils with the new glibc, so both the next
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# stage's wrappers use it.
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libc = getLibc self;
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# Unfortunately, when building gcc in the next stage, its LTO plugin
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# would use the final libc but `ld` would use the bootstrap one,
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# and that can fail to load. Therefore we upgrade `ld` to use newer libc;
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# apparently the interpreter needs to match libc, too.
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bintools = self.stdenvNoCC.mkDerivation {
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inherit (prevStage.bintools.bintools) name;
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dontUnpack = true;
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dontBuild = true;
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# We wouldn't need to *copy* all, but it's easier and the result is temporary anyway.
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installPhase = ''
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mkdir -p "$out"/bin
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cp -a '${prevStage.bintools.bintools}'/bin/* "$out"/bin/
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chmod +w "$out"/bin/ld.bfd
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patchelf --set-interpreter '${getLibc self}'/lib/ld*.so.? \
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--set-rpath "${getLibc self}/lib:$(patchelf --print-rpath "$out"/bin/ld.bfd)" \
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"$out"/bin/ld.bfd
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'';
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};
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};
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};
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})
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# Construct a third stdenv identical to the 2nd, except that this
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# one uses the rebuilt Glibc from stage2. It still uses the recent
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# binutils and rest of the bootstrap tools, including GCC.
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(prevStage: stageFun prevStage {
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name = "bootstrap-stage3";
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overrides = self: super: rec {
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inherit (prevStage)
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ccWrapperStdenv
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binutils coreutils gnugrep
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perl patchelf linuxHeaders gnum4 bison libidn2 libunistring;
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${localSystem.libc} = getLibc prevStage;
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# Link GCC statically against GMP etc. This makes sense because
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# these builds of the libraries are only used by GCC, so it
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# reduces the size of the stdenv closure.
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gmp = super.gmp.override { stdenv = self.makeStaticLibraries self.stdenv; };
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mpfr = super.mpfr.override { stdenv = self.makeStaticLibraries self.stdenv; };
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libmpc = super.libmpc.override { stdenv = self.makeStaticLibraries self.stdenv; };
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isl_0_20 = super.isl_0_20.override { stdenv = self.makeStaticLibraries self.stdenv; };
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gcc-unwrapped = super.gcc-unwrapped.override {
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isl = isl_0_20;
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# Use a deterministically built compiler
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# see https://github.com/NixOS/nixpkgs/issues/108475 for context
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reproducibleBuild = true;
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profiledCompiler = false;
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};
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};
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extraNativeBuildInputs = [ prevStage.patchelf ] ++
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# Many tarballs come with obsolete config.sub/config.guess that don't recognize aarch64.
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lib.optional (!localSystem.isx86 || localSystem.libc == "musl")
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prevStage.updateAutotoolsGnuConfigScriptsHook;
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})
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# Construct a fourth stdenv that uses the new GCC. But coreutils is
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# still from the bootstrap tools.
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(prevStage: stageFun prevStage {
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name = "bootstrap-stage4";
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overrides = self: super: {
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# Zlib has to be inherited and not rebuilt in this stage,
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# because gcc (since JAR support) already depends on zlib, and
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# then if we already have a zlib we want to use that for the
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# other purposes (binutils and top-level pkgs) too.
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inherit (prevStage) gettext gnum4 bison gmp perl texinfo zlib linuxHeaders libidn2 libunistring;
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${localSystem.libc} = getLibc prevStage;
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binutils = super.binutils.override {
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# Don't use stdenv's shell but our own
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shell = self.bash + "/bin/bash";
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# Build expand-response-params with last stage like below
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buildPackages = {
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inherit (prevStage) stdenv;
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};
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};
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gcc = lib.makeOverridable (import ../../build-support/cc-wrapper) {
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nativeTools = false;
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nativeLibc = false;
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isGNU = true;
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buildPackages = {
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inherit (prevStage) stdenv;
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};
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cc = prevStage.gcc-unwrapped;
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bintools = self.binutils;
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libc = getLibc self;
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inherit lib;
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inherit (self) stdenvNoCC coreutils gnugrep;
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shell = self.bash + "/bin/bash";
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};
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};
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extraNativeBuildInputs = [ prevStage.patchelf prevStage.xz ] ++
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# Many tarballs come with obsolete config.sub/config.guess that don't recognize aarch64.
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lib.optional (!localSystem.isx86 || localSystem.libc == "musl")
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prevStage.updateAutotoolsGnuConfigScriptsHook;
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})
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# Construct the final stdenv. It uses the Glibc and GCC, and adds
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# in a new binutils that doesn't depend on bootstrap-tools, as well
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# as dynamically linked versions of all other tools.
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#
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# When updating stdenvLinux, make sure that the result has no
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# dependency (`nix-store -qR') on bootstrapTools or the first
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# binutils built.
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(prevStage: {
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inherit config overlays;
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stdenv = import ../generic rec {
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name = "stdenv-linux";
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buildPlatform = localSystem;
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hostPlatform = localSystem;
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targetPlatform = localSystem;
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inherit config;
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preHook = ''
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# Make "strip" produce deterministic output, by setting
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# timestamps etc. to a fixed value.
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commonStripFlags="--enable-deterministic-archives"
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${commonPreHook}
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'';
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initialPath =
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((import ../common-path.nix) {pkgs = prevStage;});
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extraNativeBuildInputs = [ prevStage.patchelf ] ++
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# Many tarballs come with obsolete config.sub/config.guess that don't recognize aarch64.
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lib.optional (!localSystem.isx86 || localSystem.libc == "musl")
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prevStage.updateAutotoolsGnuConfigScriptsHook;
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cc = prevStage.gcc;
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shell = cc.shell;
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inherit (prevStage.stdenv) fetchurlBoot;
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extraAttrs = {
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# TODO: remove this!
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inherit (prevStage) glibc;
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inherit bootstrapTools;
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shellPackage = prevStage.bash;
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};
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# Mainly avoid reference to bootstrap tools
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allowedRequisites = with prevStage; with lib;
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# Simple executable tools
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concatMap (p: [ (getBin p) (getLib p) ]) [
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gzip bzip2 xz bash binutils.bintools coreutils diffutils findutils
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gawk gnumake gnused gnutar gnugrep gnupatch patchelf ed
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]
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# Library dependencies
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++ map getLib (
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[ attr acl zlib pcre libidn2 libunistring ]
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++ lib.optional (gawk.libsigsegv != null) gawk.libsigsegv
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)
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# More complicated cases
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++ (map (x: getOutput x (getLibc prevStage)) [ "out" "dev" "bin" ] )
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++ [ /*propagated from .dev*/ linuxHeaders
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binutils gcc gcc.cc gcc.cc.lib gcc.expand-response-params
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]
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++ lib.optionals (!localSystem.isx86 || localSystem.libc == "musl")
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[ prevStage.updateAutotoolsGnuConfigScriptsHook prevStage.gnu-config ];
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overrides = self: super: {
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inherit (prevStage)
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gzip bzip2 xz bash coreutils diffutils findutils gawk
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gnumake gnused gnutar gnugrep gnupatch patchelf
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attr acl zlib pcre libunistring libidn2;
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${localSystem.libc} = getLibc prevStage;
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} // lib.optionalAttrs (super.stdenv.targetPlatform == localSystem) {
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# Need to get rid of these when cross-compiling.
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inherit (prevStage) binutils binutils-unwrapped;
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gcc = cc;
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};
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};
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})
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]
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