267 lines
7.8 KiB
Nix
267 lines
7.8 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 ? "i686-linux", allPackages ? import ../../top-level/all-packages.nix}:
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rec {
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bootstrapFiles =
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if system == "i686-linux" then import ./bootstrap/i686
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else if system == "x86_64-linux" then import ./bootstrap/x86_64
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else if system == "powerpc-linux" then import ./bootstrap/powerpc
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else if system == "armv5tel-linux" then import ./bootstrap/armv5tel
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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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'';
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# The bootstrap process proceeds in several steps.
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# 1) Create a standard environment by downloading pre-built binaries
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# of coreutils, GCC, etc.
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# This function downloads a file.
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download = {url, sha256}: derivation {
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name = baseNameOf (toString url);
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builder = bootstrapFiles.sh;
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inherit system url;
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inherit (bootstrapFiles) bzip2 mkdir curl cpio ln;
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args = [ ./scripts/download.sh ];
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outputHashAlgo = "sha256";
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outputHash = sha256;
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impureEnvVars = [ "http_proxy" "https_proxy" "ftp_proxy" "all_proxy" "no_proxy" ];
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};
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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 = if (system == "armv5tel-linux") then
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([ ./scripts/unpack-bootstrap-tools-arm.sh ])
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else
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([ ./scripts/unpack-bootstrap-tools.sh ]);
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inherit (bootstrapFiles) bzip2 mkdir curl cpio;
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tarball = download {
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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.
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stdenvBootFun =
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{gcc, extraAttrs ? {}, extraPath ? [], fetchurl}:
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import ../generic {
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inherit system;
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name = "stdenv-linux-boot";
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param1 = bootstrapTools;
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preHook = builtins.toFile "prehook.sh"
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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 = fetchurl;
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inherit gcc;
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extraAttrs = extraAttrs // {inherit fetchurl;};
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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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stdenvLinuxBoot0 = stdenvBootFun {
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gcc = "/no-such-path";
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fetchurl = null;
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};
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fetchurl = import ../../build-support/fetchurl {
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stdenv = stdenvLinuxBoot0;
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curl = bootstrapTools;
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};
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# The Glibc include directory cannot have the same prefix as the GCC
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# include directory, since GCC gets confused otherwise (it will
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# search the Glibc headers before the GCC headers). So create a
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# dummy Glibc.
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bootstrapGlibc = stdenvLinuxBoot0.mkDerivation {
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name = "bootstrap-glibc";
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buildCommand = ''
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ensureDir $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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# A helper function to call gcc-wrapper.
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wrapGCC =
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{gcc ? bootstrapTools, libc, binutils, coreutils, shell ? "", name ? "bootstrap-gcc-wrapper"}:
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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 shell name;
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stdenv = stdenvLinuxBoot0;
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};
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# Helper function to override the compiler in stdenv for specific packages.
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overrideGCC = stdenv: gcc: stdenv //
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{ mkDerivation = args: stdenv.mkDerivation (args // { NIX_GCC = gcc; });
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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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stdenvLinuxBoot1 = stdenvBootFun {
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gcc = wrapGCC {
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libc = bootstrapGlibc;
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binutils = bootstrapTools;
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coreutils = bootstrapTools;
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};
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inherit fetchurl;
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};
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# 2) These are the packages that we can build with the first
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# stdenv. We only need Glibc (in step 3).
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stdenvLinuxBoot1Pkgs = allPackages {
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inherit system;
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bootStdenv = stdenvLinuxBoot1;
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};
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# 3) Build Glibc with the bootstrap tools. The result is the full,
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# dynamically linked, final Glibc.
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stdenvLinuxGlibc = stdenvLinuxBoot1Pkgs.glibc;
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# 4) Construct a second stdenv identical to the first, except that
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# this one uses the Glibc built in step 3. It still uses
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# the rest of the bootstrap tools, including GCC.
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stdenvLinuxBoot2 = removeAttrs (stdenvBootFun {
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gcc = wrapGCC {
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binutils = bootstrapTools;
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coreutils = bootstrapTools;
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libc = stdenvLinuxGlibc;
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};
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extraAttrs = {
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glibc = stdenvLinuxGlibc;
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inherit (stdenvLinuxBoot1Pkgs) perl;
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};
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inherit fetchurl;
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}) ["gcc" "binutils"];
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# 5) The packages that can be built using the second stdenv.
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stdenvLinuxBoot2Pkgs = allPackages {
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inherit system;
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bootStdenv = stdenvLinuxBoot2;
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config = {
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packageOverrides = pkgs : {
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# The stdenv's gcc will not be built with 'ppl'
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# but the resulting 'gcc' attribute of these pkgs will.
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# (that allows bootstrapping from bootstrapTools with old gmp)
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stdenv = overrideGCC pkgs.stdenv (pkgs.wrapGCC (pkgs.gcc.gcc.override {
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ppl = null;
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cloogppl = null;
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}));
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};
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};
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};
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# 6) Construct a third stdenv identical to the second, except that
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# this one uses the dynamically linked GCC and Binutils from step
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# 5. The other tools (e.g. coreutils) are still from the
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# bootstrap tools.
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stdenvLinuxBoot3 = stdenvBootFun {
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gcc = wrapGCC rec {
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inherit (stdenvLinuxBoot2Pkgs) binutils;
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coreutils = bootstrapTools;
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libc = stdenvLinuxGlibc;
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gcc = stdenvLinuxBoot2Pkgs.gcc.gcc;
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name = "";
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};
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extraAttrs = {
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inherit (stdenvLinuxBoot1Pkgs) perl;
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};
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inherit fetchurl;
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};
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# 7) The packages that can be built using the third stdenv.
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stdenvLinuxBoot3Pkgs = allPackages {
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inherit system;
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bootStdenv = stdenvLinuxBoot3;
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};
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# 8) Construct the final stdenv. It uses the Glibc, GCC and
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# Binutils built above, and adds in dynamically linked versions
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# 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.
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stdenvLinux = import ../generic {
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name = "stdenv-linux";
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inherit system;
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preHook = builtins.toFile "prehook.sh" commonPreHook;
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initialPath =
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((import ../common-path.nix) {pkgs = stdenvLinuxBoot3Pkgs;})
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++ [stdenvLinuxBoot3Pkgs.patchelf];
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gcc = wrapGCC rec {
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inherit (stdenvLinuxBoot2Pkgs) binutils;
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inherit (stdenvLinuxBoot3Pkgs) coreutils;
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libc = stdenvLinuxGlibc;
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gcc = stdenvLinuxBoot2Pkgs.gcc.gcc;
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shell = stdenvLinuxBoot3Pkgs.bash + "/bin/bash";
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name = "";
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};
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shell = stdenvLinuxBoot3Pkgs.bash + "/bin/bash";
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fetchurlBoot = fetchurl;
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extraAttrs = {
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inherit (stdenvLinuxBoot2Pkgs) binutils /* gcc */ glibc;
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inherit (stdenvLinuxBoot3Pkgs)
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gzip bzip2 bash coreutils diffutils findutils gawk
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gnumake gnused gnutar gnugrep patch patchelf
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attr acl;
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};
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};
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}
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