331 lines
12 KiB
Nix
331 lines
12 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
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, bootstrapFiles ? { # switch
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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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"mips64el-linux" = import ./bootstrap-files/loongson2f.nix;
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}.${localSystem.system}
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or (abort "unsupported platform for the pure Linux stdenv")
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}:
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assert crossSystem == null;
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let
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inherit (localSystem) system platform;
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commonPreHook =
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''
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export NIX_ENFORCE_PURITY="''${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 == "mips64el-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 ./bootstrap-tools { inherit system bootstrapFiles; };
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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: {}), extraBuildInputs ? [] }:
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let
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thisStdenv = import ../generic {
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name = "stdenv-linux-boot";
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buildPlatform = localSystem;
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hostPlatform = localSystem;
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targetPlatform = localSystem;
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inherit config extraBuildInputs;
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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 isNull prevStage.gcc-unwrapped
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then null
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else lib.makeOverridable (import ../../build-support/cc-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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hostPlatform = localSystem;
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targetPlatform = localSystem;
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cc = prevStage.gcc-unwrapped;
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isGNU = true;
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libc = prevStage.glibc;
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inherit (prevStage) binutils coreutils gnugrep;
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name = name;
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stdenv = prevStage.ccWrapperStdenv;
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};
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extraAttrs = {
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# Having the proper 'platform' in all the stdenvs allows getting proper
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# linuxHeaders for example.
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inherit platform;
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# stdenv.glibc is used by GCC build to figure out the system-level
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# /usr/include directory.
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inherit (prevStage) glibc;
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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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glibc = 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 = null;
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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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glibc = self.stdenv.mkDerivation {
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name = "bootstrap-glibc";
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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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ln -s ${bootstrapTools}/include-glibc $out/include
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'';
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};
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gcc-unwrapped = bootstrapTools;
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binutils = bootstrapTools;
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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-gcc-wrapper";
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# Rebuild binutils to use from stage2 onwards.
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overrides = self: super: {
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binutils = super.binutils.override { gold = false; };
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inherit (prevStage)
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ccWrapperStdenv
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glibc gcc-unwrapped coreutils gnugrep;
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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-gcc-wrapper";
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overrides = self: super: {
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inherit (prevStage)
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ccWrapperStdenv
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binutils gcc-unwrapped coreutils gnugrep
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perl paxctl gnum4 bison;
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# This also contains the full, dynamically linked, final Glibc.
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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-gcc-wrapper";
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overrides = self: super: rec {
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inherit (prevStage)
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ccWrapperStdenv
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binutils glibc coreutils gnugrep
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perl patchelf linuxHeaders gnum4 bison;
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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_14 = super.isl_0_14.override { stdenv = self.makeStaticLibraries self.stdenv; };
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gcc-unwrapped = super.gcc-unwrapped.override {
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isl = isl_0_14;
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};
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};
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extraBuildInputs = [ prevStage.patchelf prevStage.paxctl ] ++
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# Many tarballs come with obsolete config.sub/config.guess that don't recognize aarch64.
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lib.optional (system == "aarch64-linux") 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 = "";
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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 glibc zlib linuxHeaders;
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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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hostPlatform = localSystem;
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targetPlatform = localSystem;
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cc = prevStage.gcc-unwrapped;
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libc = self.glibc;
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inherit (self) stdenv binutils coreutils gnugrep;
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name = "";
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shell = self.bash + "/bin/bash";
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};
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};
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extraBuildInputs = [ 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 (system == "aarch64-linux") 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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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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extraBuildInputs = [ prevStage.patchelf prevStage.paxctl ] ++
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# Many tarballs come with obsolete config.sub/config.guess that don't recognize aarch64.
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lib.optional (system == "aarch64-linux") 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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inherit (prevStage) glibc;
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inherit platform 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 coreutils diffutils findutils gawk
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gnumake gnused gnutar gnugrep gnupatch patchelf ed paxctl
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]
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# Library dependencies
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++ map getLib [ attr acl zlib pcre libsigsegv ]
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# More complicated cases
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++ [
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glibc.out glibc.dev glibc.bin/*propagated from .dev*/ linuxHeaders
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gcc gcc.cc gcc.cc.lib gcc.expandResponseParams
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]
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++ lib.optional (system == "aarch64-linux") prevStage.updateAutotoolsGnuConfigScriptsHook;
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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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glibc gnumake gnused gnutar gnugrep gnupatch patchelf
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attr acl paxctl zlib pcre;
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} // lib.optionalAttrs (super.targetPlatform == localSystem) {
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# Need to get rid of these when cross-compiling.
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inherit (prevStage) binutils;
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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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