350022247a
Make stages explicit and generalize the pattern of having an stdenv and a pkgs collection for all stages to a common stage generating function called stageFun. Rewrite all stage handling with this new function. This commit doesn't change the outhash (or drvhash) of the stdenv.
273 lines
8.5 KiB
Nix
273 lines
8.5 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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# The function defaults are for easy testing.
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{ system ? builtins.currentSystem
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, allPackages ? import ../../top-level/all-packages.nix
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, platform ? null, config ? {} }:
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rec {
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lib = import ../../../lib;
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bootstrapFiles =
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if system == "i686-linux" then import ./bootstrap/i686.nix
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else if system == "x86_64-linux" then import ./bootstrap/x86_64.nix
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else if system == "armv5tel-linux" then import ./bootstrap/armv5tel.nix
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else if system == "armv6l-linux" then import ./bootstrap/armv6l.nix
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else if system == "armv7l-linux" then import ./bootstrap/armv6l.nix
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else if system == "mips64el-linux" then import ./bootstrap/loongson2f.nix
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else abort "unsupported platform for the pure Linux stdenv";
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commonPreHook =
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''
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export NIX_ENFORCE_PURITY=1
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havePatchELF=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 = derivation {
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name = "bootstrap-tools";
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builder = bootstrapFiles.sh;
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args =
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if system == "armv5tel-linux" || system == "armv6l-linux"
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|| system == "armv7l-linux"
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then [ ./scripts/unpack-bootstrap-tools-arm.sh ]
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else [ ./scripts/unpack-bootstrap-tools.sh ];
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# FIXME: get rid of curl.
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inherit (bootstrapFiles) bzip2 mkdir curl cpio;
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tarball = import <nix/fetchurl.nix> {
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inherit (bootstrapFiles.bootstrapTools) url sha256;
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};
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inherit system;
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# Needed by the GCC wrapper.
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langC = true;
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langCC = true;
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};
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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 =
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{gcc, extraAttrs ? {}, overrides ? (pkgs: {}), extraPath ? []}:
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let
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thisStdenv = import ../generic {
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inherit system config;
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name = "stdenv-linux-boot";
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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/sh";
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initialPath = [bootstrapTools] ++ extraPath;
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fetchurlBoot = import ../../build-support/fetchurl {
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stdenv = stage0.stdenv;
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curl = bootstrapTools;
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};
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inherit gcc;
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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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extraAttrs = extraAttrs // { inherit platform; };
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overrides = pkgs: (overrides pkgs) // { fetchurl = thisStdenv.fetchurlBoot; };
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};
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thisPkgs = allPackages {
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inherit system platform;
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bootStdenv = thisStdenv;
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};
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in { stdenv = thisStdenv; pkgs = thisPkgs; };
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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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stage0 = stageFun {
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gcc = "/no-such-path";
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overrides = pkgs: {
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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 = stage0.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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};
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};
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# A helper function to call gcc-wrapper.
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wrapGCC =
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{ gcc, libc, binutils, coreutils, name }:
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lib.makeOverridable (import ../../build-support/gcc-wrapper) {
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nativeTools = false;
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nativeLibc = false;
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inherit gcc binutils coreutils libc name;
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stdenv = stage0.stdenv;
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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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stage1 = stageFun {
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gcc = wrapGCC {
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gcc = bootstrapTools;
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libc = stage0.pkgs.glibc;
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binutils = bootstrapTools;
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coreutils = bootstrapTools;
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name = "bootstrap-gcc-wrapper";
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};
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# Rebuild binutils to use from stage2 onwards.
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overrides = pkgs: {
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binutils = pkgs.binutils.override { gold = 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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stage2 = stageFun {
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gcc = wrapGCC {
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gcc = bootstrapTools;
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libc = stage0.pkgs.glibc;
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binutils = stage1.pkgs.binutils;
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coreutils = bootstrapTools;
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name = "bootstrap-gcc-wrapper";
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};
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overrides = pkgs: {
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inherit (stage1.pkgs) perl;
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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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stage3 = stageFun {
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gcc = wrapGCC {
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gcc = bootstrapTools;
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libc = stage2.pkgs.glibc;
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binutils = stage1.pkgs.binutils;
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coreutils = bootstrapTools;
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name = "bootstrap-gcc-wrapper";
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};
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overrides = pkgs: {
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inherit (stage2.pkgs) glibc perl;
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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 = pkgs.gmp.override { stdenv = pkgs.makeStaticLibraries pkgs.stdenv; };
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mpfr = pkgs.mpfr.override { stdenv = pkgs.makeStaticLibraries pkgs.stdenv; };
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mpc = pkgs.mpc.override { stdenv = pkgs.makeStaticLibraries pkgs.stdenv; };
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isl = pkgs.isl.override { stdenv = pkgs.makeStaticLibraries pkgs.stdenv; };
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cloog = pkgs.cloog.override { stdenv = pkgs.makeStaticLibraries pkgs.stdenv; };
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ppl = pkgs.ppl.override { stdenv = pkgs.makeStaticLibraries pkgs.stdenv; };
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};
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extraAttrs = {
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glibc = stage2.pkgs.glibc; # Required by gcc47 build
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};
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extraPath = [ stage1.pkgs.paxctl ];
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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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stage4 = stageFun {
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gcc = wrapGCC {
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gcc = stage3.pkgs.gcc.gcc;
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libc = stage2.pkgs.glibc;
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binutils = stage1.pkgs.binutils;
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coreutils = bootstrapTools;
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name = "";
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};
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extraPath = [ stage3.pkgs.xz ];
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overrides = pkgs: {
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inherit (stage1.pkgs) perl;
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inherit (stage3.pkgs) gettext gnum4 gmp glibc;
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};
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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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stdenvLinux = import ../generic rec {
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inherit system config;
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preHook =
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''
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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 = stage4.pkgs;})
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++ [stage4.pkgs.patchelf stage4.pkgs.paxctl ];
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shell = stage4.pkgs.bash + "/bin/bash";
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gcc = (wrapGCC rec {
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gcc = stage4.stdenv.gcc.gcc;
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libc = stage4.pkgs.glibc;
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inherit (stage4.pkgs) binutils coreutils;
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name = "";
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}).override { inherit shell; };
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fetchurlBoot = stage4.stdenv.fetchurl;
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extraAttrs = {
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inherit (stage4.pkgs) glibc;
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inherit platform bootstrapTools;
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shellPackage = stage4.pkgs.bash;
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};
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overrides = pkgs: {
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inherit gcc;
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inherit (stage3.pkgs) glibc;
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inherit (stage4.pkgs) binutils;
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inherit (stage4.pkgs)
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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 paxctl;
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};
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};
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}
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