nixpkgs/pkgs/stdenv/linux/default.nix
2015-03-06 15:09:51 +01:00

349 lines
11 KiB
Nix

# 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 ? builtins.currentSystem
, allPackages ? import ../../top-level/all-packages.nix
, platform ? null, config ? {}, lib ? (import ../../../lib)
, customBootstrapFiles ? null }:
rec {
bootstrapFiles =
if customBootstrapFiles != null then customBootstrapFiles
else if system == "i686-linux" then import ./bootstrap/i686.nix
else if system == "x86_64-linux" then import ./bootstrap/x86_64.nix
else if system == "armv5tel-linux" then import ./bootstrap/armv5tel.nix
else if system == "armv6l-linux" then import ./bootstrap/armv6l.nix
else if system == "armv7l-linux" then import ./bootstrap/armv7l.nix
else if system == "mips64el-linux" then import ./bootstrap/loongson2f.nix
else abort "unsupported platform for the pure Linux stdenv";
commonPreHook =
''
export NIX_ENFORCE_PURITY=1
${if system == "x86_64-linux" then "NIX_LIB64_IN_SELF_RPATH=1" else ""}
${if system == "mips64el-linux" then "NIX_LIB32_IN_SELF_RPATH=1" else ""}
'';
# The bootstrap process proceeds in several steps.
# Create a standard environment by downloading pre-built binaries of
# coreutils, GCC, etc.
# Download and unpack the bootstrap tools (coreutils, GCC, Glibc, ...).
bootstrapTools = derivation {
name = "bootstrap-tools";
builder = bootstrapFiles.busybox;
args = if system == "armv5tel-linux" then
[ "ash" "-e" ./scripts/unpack-bootstrap-tools-arm.sh ]
else
[ "ash" "-e" ./scripts/unpack-bootstrap-tools.sh ];
tarball = bootstrapFiles.bootstrapTools;
inherit system;
# Needed by the GCC wrapper.
langC = true;
langCC = true;
isGNU = true;
};
# This function builds the various standard environments used during
# the bootstrap. In all stages, we build an stdenv and the package
# set that can be built with that stdenv.
stageFun =
{gccPlain, glibc, binutils, coreutils, name, overrides ? (pkgs: {}), extraBuildInputs ? []}:
let
thisStdenv = import ../generic {
inherit system config extraBuildInputs;
name = "stdenv-linux-boot";
preHook =
''
# Don't patch #!/interpreter because it leads to retained
# dependencies on the bootstrapTools in the final stdenv.
dontPatchShebangs=1
${commonPreHook}
'';
shell = "${bootstrapTools}/bin/sh";
initialPath = [bootstrapTools];
fetchurlBoot = import ../../build-support/fetchurl {
stdenv = stage0.stdenv;
curl = bootstrapTools;
};
cc = if isNull gccPlain
then "/no-such-path"
else lib.makeOverridable (import ../../build-support/cc-wrapper) {
nativeTools = false;
nativeLibc = false;
cc = gccPlain;
libc = glibc;
inherit binutils coreutils;
name = name;
stdenv = stage0.stdenv;
};
extraAttrs = {
# Having the proper 'platform' in all the stdenvs allows getting proper
# linuxHeaders for example.
inherit platform;
# stdenv.glibc is used by GCC build to figure out the system-level
# /usr/include directory.
inherit glibc;
};
overrides = pkgs: (overrides pkgs) // { fetchurl = thisStdenv.fetchurlBoot; };
};
thisPkgs = allPackages {
inherit system platform;
bootStdenv = thisStdenv;
};
in { stdenv = thisStdenv; pkgs = thisPkgs; };
# Build a dummy stdenv with no GCC or working fetchurl. This is
# because we need a stdenv to build the GCC wrapper and fetchurl.
stage0 = stageFun {
gccPlain = null;
glibc = null;
binutils = null;
coreutils = null;
name = null;
overrides = pkgs: {
# The Glibc include directory cannot have the same prefix as the
# GCC include directory, since GCC gets confused otherwise (it
# will search the Glibc headers before the GCC headers). So
# create a dummy Glibc here, which will be used in the stdenv of
# stage1.
glibc = stage0.stdenv.mkDerivation {
name = "bootstrap-glibc";
buildCommand = ''
mkdir -p $out
ln -s ${bootstrapTools}/lib $out/lib
ln -s ${bootstrapTools}/include-glibc $out/include
'';
};
};
};
# Create the first "real" standard environment. This one consists
# of bootstrap tools only, and a minimal Glibc to keep the GCC
# configure script happy.
#
# For clarity, we only use the previous stage when specifying these
# stages. So stageN should only ever have references for stage{N-1}.
#
# If we ever need to use a package from more than one stage back, we
# simply re-export those packages in the middle stage(s) using the
# overrides attribute and the inherit syntax.
stage1 = stageFun {
gccPlain = bootstrapTools;
inherit (stage0.pkgs) glibc;
binutils = bootstrapTools;
coreutils = bootstrapTools;
name = "bootstrap-gcc-wrapper";
# Rebuild binutils to use from stage2 onwards.
overrides = pkgs: {
binutils = pkgs.binutils.override { gold = false; };
inherit (stage0.pkgs) glibc;
# A threaded perl build needs glibc/libpthread_nonshared.a,
# which is not included in bootstrapTools, so disable threading.
# This is not an issue for the final stdenv, because this perl
# won't be included in the final stdenv and won't be exported to
# top-level pkgs as an override either.
perl = pkgs.perl.override { enableThreading = false; };
};
};
# 2nd stdenv that contains our own rebuilt binutils and is used for
# compiling our own Glibc.
stage2 = stageFun {
gccPlain = bootstrapTools;
inherit (stage1.pkgs) glibc;
binutils = stage1.pkgs.binutils;
coreutils = bootstrapTools;
name = "bootstrap-gcc-wrapper";
overrides = pkgs: {
inherit (stage1.pkgs) perl binutils paxctl;
# This also contains the full, dynamically linked, final Glibc.
};
};
# Construct a third stdenv identical to the 2nd, except that this
# one uses the rebuilt Glibc from stage2. It still uses the recent
# binutils and rest of the bootstrap tools, including GCC.
stage3 = stageFun {
gccPlain = bootstrapTools;
inherit (stage2.pkgs) glibc binutils;
coreutils = bootstrapTools;
name = "bootstrap-gcc-wrapper";
overrides = pkgs: {
inherit (stage2.pkgs) binutils glibc perl patchelf linuxHeaders;
# Link GCC statically against GMP etc. This makes sense because
# these builds of the libraries are only used by GCC, so it
# reduces the size of the stdenv closure.
gmp = pkgs.gmp.override { stdenv = pkgs.makeStaticLibraries pkgs.stdenv; };
mpfr = pkgs.mpfr.override { stdenv = pkgs.makeStaticLibraries pkgs.stdenv; };
libmpc = pkgs.libmpc.override { stdenv = pkgs.makeStaticLibraries pkgs.stdenv; };
isl = pkgs.isl.override { stdenv = pkgs.makeStaticLibraries pkgs.stdenv; };
cloog = pkgs.cloog.override { stdenv = pkgs.makeStaticLibraries pkgs.stdenv; };
gccPlain = pkgs.gcc.cc;
};
extraBuildInputs = [ stage2.pkgs.patchelf stage2.pkgs.paxctl ];
};
# Construct a fourth stdenv that uses the new GCC. But coreutils is
# still from the bootstrap tools.
stage4 = stageFun {
inherit (stage3.pkgs) gccPlain glibc binutils;
coreutils = bootstrapTools;
name = "";
overrides = pkgs: {
# Zlib has to be inherited and not rebuilt in this stage,
# because gcc (since JAR support) already depends on zlib, and
# then if we already have a zlib we want to use that for the
# other purposes (binutils and top-level pkgs) too.
inherit (stage3.pkgs) gettext gnum4 gmp perl glibc zlib linuxHeaders;
gcc = lib.makeOverridable (import ../../build-support/cc-wrapper) {
nativeTools = false;
nativeLibc = false;
cc = stage4.stdenv.cc.cc;
libc = stage4.pkgs.glibc;
inherit (stage4.pkgs) binutils coreutils;
name = "";
stdenv = stage4.stdenv;
shell = stage4.pkgs.bash + "/bin/bash";
};
};
extraBuildInputs = [ stage3.pkgs.patchelf stage3.pkgs.xz ];
};
# Construct the final stdenv. It uses the Glibc and GCC, and adds
# in a new binutils that doesn't depend on bootstrap-tools, as well
# as dynamically linked versions of all other tools.
#
# When updating stdenvLinux, make sure that the result has no
# dependency (`nix-store -qR') on bootstrapTools or the first
# binutils built.
stdenvLinux = import ../generic rec {
inherit system config;
preHook =
''
# Make "strip" produce deterministic output, by setting
# timestamps etc. to a fixed value.
commonStripFlags="--enable-deterministic-archives"
${commonPreHook}
'';
initialPath =
((import ../common-path.nix) {pkgs = stage4.pkgs;});
extraBuildInputs = [ stage4.pkgs.patchelf stage4.pkgs.paxctl ];
cc = stage4.pkgs.gcc;
shell = cc.shell;
inherit (stage4.stdenv) fetchurlBoot;
extraAttrs = {
inherit (stage4.pkgs) glibc;
inherit platform bootstrapTools;
shellPackage = stage4.pkgs.bash;
};
allowedRequisites = with stage4.pkgs;
[ gzip bzip2 xz bash binutils coreutils diffutils findutils gawk
glibc gnumake gnused gnutar gnugrep gnupatch patchelf attr acl
paxctl zlib pcre linuxHeaders ed gcc gcc.cc libsigsegv
];
overrides = pkgs: {
gcc = cc;
inherit (stage4.pkgs)
gzip bzip2 xz bash binutils coreutils diffutils findutils gawk
glibc gnumake gnused gnutar gnugrep gnupatch patchelf
attr acl paxctl zlib pcre;
};
};
testBootstrapTools = let
defaultPkgs = allPackages { inherit system platform; };
in derivation {
name = "test-bootstrap-tools";
inherit system;
builder = bootstrapFiles.busybox;
args = [ "ash" "-e" "-c" "eval \"$buildCommand\"" ];
buildCommand = ''
export PATH=${bootstrapTools}/bin
ls -l
mkdir $out
mkdir $out/bin
sed --version
find --version
diff --version
patch --version
make --version
awk --version
grep --version
gcc --version
curl --version
ldlinux=$(echo ${bootstrapTools}/lib/ld-linux*.so.?)
export CPP="cpp -idirafter ${bootstrapTools}/include-glibc -B${bootstrapTools}"
export CC="gcc -idirafter ${bootstrapTools}/include-glibc -B${bootstrapTools} -Wl,-dynamic-linker,$ldlinux -Wl,-rpath,${bootstrapTools}/lib"
export CXX="g++ -idirafter ${bootstrapTools}/include-glibc -B${bootstrapTools} -Wl,-dynamic-linker,$ldlinux -Wl,-rpath,${bootstrapTools}/lib"
echo '#include <stdio.h>' >> foo.c
echo '#include <limits.h>' >> foo.c
echo 'int main() { printf("Hello World\\n"); return 0; }' >> foo.c
$CC -o $out/bin/foo foo.c
$out/bin/foo
echo '#include <iostream>' >> bar.cc
echo 'int main() { std::cout << "Hello World\\n"; }' >> bar.cc
$CXX -v -o $out/bin/bar bar.cc
$out/bin/bar
tar xvf ${defaultPkgs.hello.src}
cd hello-*
./configure --prefix=$out
make
make install
'';
};
}