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# This file constructs the standard build environment for the
# Linux/i686 platform. It's completely pure; that is, it relies on no
# external (non-Nix) tools, such as /usr/bin/gcc, and it contains a C
# compiler and linker that do not search in default locations,
# ensuring purity of components produced by it.
# The function defaults are for easy testing.
{system ? "i686-linux", allPackages ? import ../../top-level/all-packages.nix}:
rec {
bootstrapTools =
if system == "i686-linux" then import ./bootstrap/i686
else if system == "x86_64-linux" then import ./bootstrap/x86_64
else if system == "powerpc-linux" then import ./bootstrap/powerpc
else abort "unsupported platform for the pure Linux stdenv";
# The bootstrap process proceeds in several steps.
# 1) Create a standard environment by downloading pre-built
# statically linked binaries of coreutils, gcc, etc.
# To fetch the pre-built binaries, we use a statically linked `curl'
# binary which is unpacked here.
curl = derivation {
inherit system;
name = "curl";
builder = bootstrapTools.bash;
inherit (bootstrapTools) bzip2 cp curl;
args = [ ./scripts/unpack-curl.sh ];
};
# This function downloads a file.
download = {url, sha1, pkgname}: derivation {
name = baseNameOf (toString url);
builder = bootstrapTools.bash;
inherit system curl url;
args = [ ./scripts/download.sh ];
outputHashAlgo = "sha1";
outputHash = sha1;
};
# This function downloads and unpacks a file.
downloadAndUnpack = pkgname: {url, sha1}: derivation {
name = pkgname;
builder = bootstrapTools.bash;
inherit (bootstrapTools) bzip2 tar cp;
args = [ ./scripts/unpack.sh ];
tarball = download {inherit url sha1 pkgname;};
inherit system;
allowedReferences = [];
};
# The various statically linked components that make up the standard
# environment.
staticTools = downloadAndUnpack "static-tools" bootstrapTools.staticToolsURL;
staticBinutils = downloadAndUnpack "static-binutils" bootstrapTools.binutilsURL;
staticGCC = (downloadAndUnpack "static-gcc" bootstrapTools.gccURL)
// { langC = true; langCC = false; langF77 = false; };
staticGlibc = downloadAndUnpack "static-glibc" bootstrapTools.glibcURL;
# A helper function to call gcc-wrapper.
wrapGCC =
{gcc ? staticGCC, libc, binutils, shell ? ""}:
(import ../../build-support/gcc-wrapper) {
nativeTools = false;
nativeLibc = false;
inherit gcc binutils libc shell;
stdenv = stdenvInitial;
};
# The "fake" standard environment used to build "real" standard
# environments. It consists of just the basic statically linked
# tools.
stdenvInitial = let {
body = derivation {
name = "stdenv-linux-initial";
builder = bootstrapTools.bash;
args = [ ./scripts/builder-stdenv-initial.sh ];
stdenvScript = ../generic/setup.sh;
inherit system staticTools curl;
} // {
# !!! too much duplication with stdenv/generic/default.nix
mkDerivation = attrs: (derivation ((removeAttrs attrs ["meta"]) // {
builder = bootstrapTools.bash;
args = ["-e" attrs.builder];
stdenv = body;
system = body.system;
})) // { meta = if attrs ? meta then attrs.meta else {}; };
shell = bootstrapTools.bash;
};
};
# This function builds the various standard environments used during
# the bootstrap.
stdenvBootFun =
{gcc, staticGlibc, extraAttrs ? {}, extraPath ? []}:
let
fetchurlBoot = import ../../build-support/fetchurl {
stdenv = stdenvInitial;
inherit curl;
};
in import ../generic {
name = "stdenv-linux-boot";
param1 = if staticGlibc then "static" else "dynamic";
preHook = ./scripts/prehook.sh;
stdenv = stdenvInitial;
shell = bootstrapTools.bash;
initialPath = [staticTools] ++ extraPath;
inherit fetchurlBoot;
forceFetchurlBoot = true;
inherit gcc extraAttrs;
};
# Create the first "real" standard environment. This one consists
# of statically linked components only, and a minimal glibc to keep
# the gcc configure script happy.
stdenvLinuxBoot1 = stdenvBootFun {
# Use the statically linked, downloaded glibc/gcc/binutils.
gcc = wrapGCC {libc = staticGlibc; binutils = staticBinutils;};
staticGlibc = true;
};
# 2) These are the packages that we can build with the first
# stdenv. We only need Glibc (in step 3).
stdenvLinuxBoot1Pkgs = allPackages {
inherit system;
bootStdenv = stdenvLinuxBoot1;
};
# 3) Build Glibc with the statically linked tools. The result is the
# full, dynamically linked, final Glibc.
stdenvLinuxGlibc = stdenvLinuxBoot1Pkgs.glibc;
# 4) Construct a second stdenv identical to the first, except that
# this one uses the Glibc built in step 3. It still uses
# statically linked tools.
stdenvLinuxBoot2 = removeAttrs (stdenvBootFun {
staticGlibc = false;
gcc = wrapGCC {binutils = staticBinutils; libc = stdenvLinuxGlibc;};
extraAttrs = {glibc = stdenvLinuxGlibc;};
}) ["gcc" "binutils"];
# 5) The packages that can be built using the second stdenv.
stdenvLinuxBoot2Pkgs = allPackages {
inherit system;
bootStdenv = stdenvLinuxBoot2;
};
# Ugh, some packages in stdenvLinuxBoot3Pkgs need "sh", so create a
# package that contains just a symlink to bash.
shSymlink = stdenvLinuxBoot2Pkgs.runCommand "sh-symlink" {} ''
ensureDir $out/bin
ln -s $shell $out/bin/sh
'';
# 6) Construct a third stdenv identical to the second, except that
# this one uses the dynamically linked GCC and Binutils from step
# 5. The other tools (e.g. coreutils) are still static.
stdenvLinuxBoot3 = stdenvBootFun {
staticGlibc = false;
gcc = wrapGCC {
inherit (stdenvLinuxBoot2Pkgs) binutils;
libc = stdenvLinuxGlibc;
gcc = stdenvLinuxBoot2Pkgs.gcc.gcc;
};
extraPath = [stdenvLinuxBoot2Pkgs.replace shSymlink];
};
# 7) The packages that can be built using the third stdenv.
stdenvLinuxBoot3Pkgs = allPackages {
inherit system;
bootStdenv = stdenvLinuxBoot3;
};
# 8) Construct the final stdenv. It uses the Glibc, GCC and
# Binutils built above, and adds in dynamically linked versions
# of all other tools.
stdenvLinux = import ../generic {
name = "stdenv-linux";
preHook = ./scripts/prehook.sh;
initialPath = [
((import ../common-path.nix) {pkgs = stdenvLinuxBoot3Pkgs;})
stdenvLinuxBoot3Pkgs.patchelf
];
stdenv = stdenvInitial;
gcc = wrapGCC {
inherit (stdenvLinuxBoot2Pkgs) binutils;
libc = stdenvLinuxGlibc;
gcc = stdenvLinuxBoot2Pkgs.gcc.gcc;
shell = stdenvLinuxBoot3Pkgs.bash + "/bin/sh";
};
shell = stdenvLinuxBoot3Pkgs.bash + "/bin/sh";
fetchurlBoot = stdenvLinuxBoot3.fetchurlBoot;
forceFetchurlBoot = false;
extraAttrs = {
inherit (stdenvLinuxBoot2Pkgs) binutils /* gcc */ glibc;
inherit (stdenvLinuxBoot3Pkgs)
gzip bzip2 bash coreutils diffutils findutils gawk
gnumakeNix gnused gnutar gnugrep patch patchelf
attr acl;
};
};
}
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