302 lines
10 KiB
Nix
302 lines
10 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 ? {}, lib ? (import ../../../lib) }:
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rec {
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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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${if system == "x86_64-linux" then "NIX_LIB64_IN_SELF_RPATH=1" else ""}
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${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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{gccPlain, glibc, binutils, coreutils, name, overrides ? (pkgs: {}), extraBuildInputs ? []}:
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let
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thisStdenv = import ../generic {
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inherit system config extraBuildInputs;
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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];
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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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gcc = if isNull gccPlain
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then "/no-such-path"
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else lib.makeOverridable (import ../../build-support/gcc-wrapper) {
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nativeTools = false;
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nativeLibc = false;
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gcc = gccPlain;
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libc = glibc;
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inherit binutils coreutils;
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name = name;
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stdenv = stage0.stdenv;
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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 glibc;
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};
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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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gccPlain = null;
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glibc = null;
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binutils = null;
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coreutils = null;
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name = null;
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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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# 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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stage1 = stageFun {
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gccPlain = bootstrapTools;
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inherit (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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# 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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inherit (stage0.pkgs) glibc;
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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 = pkgs.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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stage2 = stageFun {
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gccPlain = bootstrapTools;
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inherit (stage1.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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overrides = pkgs: {
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inherit (stage1.pkgs) perl binutils paxctl;
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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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gccPlain = bootstrapTools;
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inherit (stage2.pkgs) glibc binutils;
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coreutils = bootstrapTools;
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name = "bootstrap-gcc-wrapper";
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overrides = pkgs: {
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inherit (stage2.pkgs) binutils glibc perl patchelf linuxHeaders;
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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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gccPlain = pkgs.gcc.gcc;
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};
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extraBuildInputs = [ stage2.pkgs.patchelf stage2.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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inherit (stage3.pkgs) gccPlain glibc binutils;
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coreutils = bootstrapTools;
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name = "";
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overrides = pkgs: {
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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 (stage3.pkgs) gettext gnum4 gmp perl glibc zlib linuxHeaders;
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gcc = lib.makeOverridable (import ../../build-support/gcc-wrapper) {
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nativeTools = false;
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nativeLibc = false;
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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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stdenv = stage4.stdenv;
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shell = stage4.pkgs.bash + "/bin/bash";
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};
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};
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extraBuildInputs = [ stage3.pkgs.patchelf stage3.pkgs.xz ];
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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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extraBuildInputs = [ stage4.pkgs.patchelf stage4.pkgs.paxctl ];
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gcc = stage4.pkgs.gcc;
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shell = gcc.shell;
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inherit (stage4.stdenv) fetchurlBoot;
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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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allowedRequisites = with stage4.pkgs;
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[ gzip bzip2 xz bash binutils coreutils diffutils findutils gawk
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glibc gnumake gnused gnutar gnugrep gnupatch patchelf attr acl
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paxctl zlib pcre linuxHeaders ed gcc gcc.gcc libsigsegv
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];
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overrides = pkgs: {
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inherit gcc;
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inherit (stage4.pkgs)
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gzip bzip2 xz bash binutils 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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};
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};
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}
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