nixpkgs/pkgs/development/compilers/ghc/head.nix
Sergei Trofimovich 849d47a928 ghc: use CXX=c++, not CXX=cxx
Otherwise attempt to build ghcHEAD from local checkout fails as:

    $ nix build -L --impure --expr 'with import ~/nm {}; haskell.compiler.ghcHEAD.overrideAttrs (oa: { src = ./.; patches = []; nativeBuildInputs = oa.nativeBuildInputs ++ [ git ]; })' --keep-failed
    ...
    ghc> checking C++ standard library flavour... ./configure: line 11487: /nix/store/r7r10qvsqlnvbzjkjinvscjlahqbxifl-gcc-wrapper-11.3.0/bin/cxx: No such file or directory

I think 'cxx' is not provided by stdenv.
2022-05-29 20:02:53 +02:00

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{ lib, stdenv, pkgsBuildTarget, pkgsHostTarget, targetPackages
# build-tools
, bootPkgs
, autoconf, autoreconfHook, automake, coreutils, fetchgit, perl, python3, m4, sphinx
, xattr, autoSignDarwinBinariesHook
, bash
, libiconv ? null, ncurses
, # GHC can be built with system libffi or a bundled one.
libffi ? null
# Libdw.c only supports x86_64, i686 and s390x
, enableDwarf ? (stdenv.targetPlatform.isx86 ||
(stdenv.targetPlatform.isS390 && stdenv.targetPlatform.is64bit)) &&
lib.meta.availableOn stdenv.hostPlatform elfutils &&
lib.meta.availableOn stdenv.targetPlatform elfutils
, elfutils # for DWARF support
, useLLVM ? !(stdenv.targetPlatform.isx86
|| stdenv.targetPlatform.isPower
|| stdenv.targetPlatform.isSparc
|| (stdenv.targetPlatform.isAarch64 && stdenv.targetPlatform.isDarwin))
, # LLVM is conceptually a run-time-only depedendency, but for
# non-x86, we need LLVM to bootstrap later stages, so it becomes a
# build-time dependency too.
buildTargetLlvmPackages, llvmPackages
, # If enabled, GHC will be built with the GPL-free but slightly slower native
# bignum backend instead of the faster but GPLed gmp backend.
enableNativeBignum ? !(lib.meta.availableOn stdenv.hostPlatform gmp)
, gmp
, # If enabled, use -fPIC when compiling static libs.
enableRelocatedStaticLibs ? stdenv.targetPlatform != stdenv.hostPlatform
# aarch64 outputs otherwise exceed 2GB limit
, enableProfiledLibs ? !stdenv.targetPlatform.isAarch64
, # Whether to build dynamic libs for the standard library (on the target
# platform). Static libs are always built.
enableShared ? !stdenv.targetPlatform.isWindows && !stdenv.targetPlatform.useiOSPrebuilt
, version ? "9.3.20220406"
, # What flavour to build. An empty string indicates no
# specific flavour and falls back to ghc default values.
ghcFlavour ? lib.optionalString (stdenv.targetPlatform != stdenv.hostPlatform)
(if useLLVM then "perf-cross" else "perf-cross-ncg")
, # Whether to build sphinx documentation.
enableDocs ? (
# Docs disabled for musl and cross because it's a large task to keep
# all `sphinx` dependencies building in those environments.
# `sphinx` pullls in among others:
# Ruby, Python, Perl, Rust, OpenGL, Xorg, gtk, LLVM.
(stdenv.targetPlatform == stdenv.hostPlatform)
&& !stdenv.hostPlatform.isMusl
)
, enableHaddockProgram ?
# Disabled for cross; see note [HADDOCK_DOCS].
(stdenv.targetPlatform == stdenv.hostPlatform)
, # Whether to disable the large address space allocator
# necessary fix for iOS: https://www.reddit.com/r/haskell/comments/4ttdz1/building_an_osxi386_to_iosarm64_cross_compiler/d5qvd67/
disableLargeAddressSpace ? stdenv.targetPlatform.isiOS
}:
assert !enableNativeBignum -> gmp != null;
# Cross cannot currently build the `haddock` program for silly reasons,
# see note [HADDOCK_DOCS].
assert (stdenv.targetPlatform != stdenv.hostPlatform) -> !enableHaddockProgram;
let
inherit (stdenv) buildPlatform hostPlatform targetPlatform;
inherit (bootPkgs) ghc;
# TODO(@Ericson2314) Make unconditional
targetPrefix = lib.optionalString
(targetPlatform != hostPlatform)
"${targetPlatform.config}-";
buildMK = dontStrip: ''
BuildFlavour = ${ghcFlavour}
ifneq \"\$(BuildFlavour)\" \"\"
include mk/flavours/\$(BuildFlavour).mk
endif
BUILD_SPHINX_HTML = ${if enableDocs then "YES" else "NO"}
BUILD_SPHINX_PDF = NO
'' +
# Note [HADDOCK_DOCS]:
# Unfortunately currently `HADDOCK_DOCS` controls both whether the `haddock`
# program is built (which we generally always want to have a complete GHC install)
# and whether it is run on the GHC sources to generate hyperlinked source code
# (which is impossible for cross-compilation); see:
# https://gitlab.haskell.org/ghc/ghc/-/issues/20077
# This implies that currently a cross-compiled GHC will never have a `haddock`
# program, so it can never generate haddocks for any packages.
# If this is solved in the future, we'd like to unconditionally
# build the haddock program (removing the `enableHaddockProgram` option).
''
HADDOCK_DOCS = ${if enableHaddockProgram then "YES" else "NO"}
DYNAMIC_GHC_PROGRAMS = ${if enableShared then "YES" else "NO"}
BIGNUM_BACKEND = ${if enableNativeBignum then "native" else "gmp"}
'' + lib.optionalString (targetPlatform != hostPlatform) ''
Stage1Only = ${if (targetPlatform.system == hostPlatform.system && !targetPlatform.isiOS) then "NO" else "YES"}
CrossCompilePrefix = ${targetPrefix}
'' + lib.optionalString dontStrip ''
STRIP_CMD = :
'' + lib.optionalString (!enableProfiledLibs) ''
GhcLibWays = "v dyn"
'' + lib.optionalString enableRelocatedStaticLibs ''
GhcLibHcOpts += -fPIC
GhcRtsHcOpts += -fPIC
'' + lib.optionalString targetPlatform.useAndroidPrebuilt ''
EXTRA_CC_OPTS += -std=gnu99
''
# While split sections are now enabled by default in ghc 8.8 for windows,
# they seem to lead to `too many sections` errors when building base for
# profiling.
+ lib.optionalString targetPlatform.isWindows ''
SplitSections = NO
'';
# Splicer will pull out correct variations
libDeps = platform:
[libffi ncurses]
++ lib.optional (!enableNativeBignum) gmp
++ lib.optional (platform.libc != "glibc" && !targetPlatform.isWindows) libiconv
++ lib.optional enableDwarf elfutils;
# TODO(@sternenseemann): is buildTarget LLVM unnecessary?
# GHC doesn't seem to have {LLC,OPT}_HOST
toolsForTarget = [
pkgsBuildTarget.targetPackages.stdenv.cc
] ++ lib.optional useLLVM buildTargetLlvmPackages.llvm;
targetCC = builtins.head toolsForTarget;
# Sometimes we have to dispatch between the bintools wrapper and the unwrapped
# derivation for certain tools depending on the platform.
bintoolsFor = {
# GHC needs install_name_tool on all darwin platforms. On aarch64-darwin it is
# part of the bintools wrapper (due to codesigning requirements), but not on
# x86_64-darwin.
install_name_tool =
if stdenv.targetPlatform.isAarch64
then targetCC.bintools
else targetCC.bintools.bintools;
# Same goes for strip.
strip =
# TODO(@sternenseemann): also use wrapper if linker == "bfd" or "gold"
if stdenv.targetPlatform.isAarch64 && stdenv.targetPlatform.isDarwin
then targetCC.bintools
else targetCC.bintools.bintools;
};
# Use gold either following the default, or to avoid the BFD linker due to some bugs / perf issues.
# But we cannot avoid BFD when using musl libc due to https://sourceware.org/bugzilla/show_bug.cgi?id=23856
# see #84670 and #49071 for more background.
useLdGold = targetPlatform.linker == "gold" ||
(targetPlatform.linker == "bfd" && (targetCC.bintools.bintools.hasGold or false) && !targetPlatform.isMusl);
# Makes debugging easier to see which variant is at play in `nix-store -q --tree`.
variantSuffix = lib.concatStrings [
(lib.optionalString stdenv.hostPlatform.isMusl "-musl")
(lib.optionalString enableNativeBignum "-native-bignum")
];
in
# C compiler, bintools and LLVM are used at build time, but will also leak into
# the resulting GHC's settings file and used at runtime. This means that we are
# currently only able to build GHC if hostPlatform == buildPlatform.
assert targetCC == pkgsHostTarget.targetPackages.stdenv.cc;
assert buildTargetLlvmPackages.llvm == llvmPackages.llvm;
assert stdenv.targetPlatform.isDarwin -> buildTargetLlvmPackages.clang == llvmPackages.clang;
stdenv.mkDerivation (rec {
inherit version;
inherit (src) rev;
pname = "${targetPrefix}ghc${variantSuffix}";
src = fetchgit {
url = "https://gitlab.haskell.org/ghc/ghc.git/";
rev = "c44432db254d2fc960d7864e080cb50e65dfa7c6";
sha256 = "0xagijcfcw3a19s6dmh6z7085lvkrakys3lcby4ncq1v0syh507h";
};
enableParallelBuilding = true;
outputs = [ "out" "doc" ];
postPatch = "patchShebangs .";
# GHC is a bit confused on its cross terminology.
# TODO(@sternenseemann): investigate coreutils dependencies and pass absolute paths
preConfigure = ''
for env in $(env | grep '^TARGET_' | sed -E 's|\+?=.*||'); do
export "''${env#TARGET_}=''${!env}"
done
# GHC is a bit confused on its cross terminology, as these would normally be
# the *host* tools.
export CC="${targetCC}/bin/${targetCC.targetPrefix}cc"
export CXX="${targetCC}/bin/${targetCC.targetPrefix}c++"
# Use gold to work around https://sourceware.org/bugzilla/show_bug.cgi?id=16177
# and more generally have a faster linker.
export LD="${targetCC.bintools}/bin/${targetCC.bintools.targetPrefix}ld${lib.optionalString useLdGold ".gold"}"
export AS="${targetCC.bintools.bintools}/bin/${targetCC.bintools.targetPrefix}as"
export AR="${targetCC.bintools.bintools}/bin/${targetCC.bintools.targetPrefix}ar"
export NM="${targetCC.bintools.bintools}/bin/${targetCC.bintools.targetPrefix}nm"
export RANLIB="${targetCC.bintools.bintools}/bin/${targetCC.bintools.targetPrefix}ranlib"
export READELF="${targetCC.bintools.bintools}/bin/${targetCC.bintools.targetPrefix}readelf"
export STRIP="${bintoolsFor.strip}/bin/${bintoolsFor.strip.targetPrefix}strip"
'' + lib.optionalString (stdenv.targetPlatform.linker == "cctools") ''
export OTOOL="${targetCC.bintools.bintools}/bin/${targetCC.bintools.targetPrefix}otool"
export INSTALL_NAME_TOOL="${bintoolsFor.install_name_tool}/bin/${bintoolsFor.install_name_tool.targetPrefix}install_name_tool"
'' + lib.optionalString useLLVM ''
export LLC="${lib.getBin buildTargetLlvmPackages.llvm}/bin/llc"
export OPT="${lib.getBin buildTargetLlvmPackages.llvm}/bin/opt"
'' + lib.optionalString (useLLVM && stdenv.targetPlatform.isDarwin) ''
# LLVM backend on Darwin needs clang: https://downloads.haskell.org/~ghc/latest/docs/html/users_guide/codegens.html#llvm-code-generator-fllvm
export CLANG="${buildTargetLlvmPackages.clang}/bin/${buildTargetLlvmPackages.clang.targetPrefix}clang"
'' + ''
# otherwise haddock fails when generating the compiler docs
export LANG=C.UTF-8
echo -n "${buildMK dontStrip}" > mk/build.mk
echo ${version} > VERSION
echo ${src.rev} > GIT_COMMIT_ID
./boot
sed -i -e 's|-isysroot /Developer/SDKs/MacOSX10.5.sdk||' configure
'' + lib.optionalString (!stdenv.isDarwin) ''
export NIX_LDFLAGS+=" -rpath $out/lib/ghc-${version}"
'' + lib.optionalString stdenv.isDarwin ''
export NIX_LDFLAGS+=" -no_dtrace_dof"
# GHC tries the host xattr /usr/bin/xattr by default which fails since it expects python to be 2.7
export XATTR=${lib.getBin xattr}/bin/xattr
'' + lib.optionalString targetPlatform.useAndroidPrebuilt ''
sed -i -e '5i ,("armv7a-unknown-linux-androideabi", ("e-m:e-p:32:32-i64:64-v128:64:128-a:0:32-n32-S64", "cortex-a8", ""))' llvm-targets
'' + lib.optionalString targetPlatform.isMusl ''
echo "patching llvm-targets for musl targets..."
echo "Cloning these existing '*-linux-gnu*' targets:"
grep linux-gnu llvm-targets | sed 's/^/ /'
echo "(go go gadget sed)"
sed -i 's,\(^.*linux-\)gnu\(.*\)$,\0\n\1musl\2,' llvm-targets
echo "llvm-targets now contains these '*-linux-musl*' targets:"
grep linux-musl llvm-targets | sed 's/^/ /'
echo "And now patching to preserve '-musleabi' as done with '-gnueabi'"
# (aclocal.m4 is actual source, but patch configure as well since we don't re-gen)
for x in configure aclocal.m4; do
substituteInPlace $x \
--replace '*-android*|*-gnueabi*)' \
'*-android*|*-gnueabi*|*-musleabi*)'
done
'';
# TODO(@Ericson2314): Always pass "--target" and always prefix.
configurePlatforms = [ "build" "host" ]
++ lib.optional (targetPlatform != hostPlatform) "target";
# `--with` flags for libraries needed for RTS linker
configureFlags = [
"--datadir=$doc/share/doc/ghc"
"--with-curses-libraries=${ncurses.out}/lib"
] ++ lib.optionals (libffi != null) [
"--with-system-libffi"
"--with-ffi-includes=${targetPackages.libffi.dev}/include"
"--with-ffi-libraries=${targetPackages.libffi.out}/lib"
] ++ lib.optionals (targetPlatform == hostPlatform && !enableNativeBignum) [
"--with-gmp-includes=${targetPackages.gmp.dev}/include"
"--with-gmp-libraries=${targetPackages.gmp.out}/lib"
] ++ lib.optionals (targetPlatform == hostPlatform && hostPlatform.libc != "glibc" && !targetPlatform.isWindows) [
"--with-iconv-includes=${libiconv}/include"
"--with-iconv-libraries=${libiconv}/lib"
] ++ lib.optionals (targetPlatform != hostPlatform) [
"--enable-bootstrap-with-devel-snapshot"
] ++ lib.optionals useLdGold [
"CFLAGS=-fuse-ld=gold"
"CONF_GCC_LINKER_OPTS_STAGE1=-fuse-ld=gold"
"CONF_GCC_LINKER_OPTS_STAGE2=-fuse-ld=gold"
] ++ lib.optional disableLargeAddressSpace "--disable-large-address-space"
++ lib.optionals enableDwarf [
"--enable-dwarf-unwind"
"--with-libdw-includes=${lib.getDev elfutils}/include"
"--with-libdw-libraries=${lib.getLib elfutils}/lib"
];
# Make sure we never relax`$PATH` and hooks support for compatibility.
strictDeps = true;
# Dont add -liconv to LDFLAGS automatically so that GHC will add it itself.
dontAddExtraLibs = true;
nativeBuildInputs = [
perl autoconf autoreconfHook automake m4 python3
ghc bootPkgs.alex bootPkgs.happy bootPkgs.hscolour
] ++ lib.optionals (stdenv.isDarwin && stdenv.isAarch64) [
autoSignDarwinBinariesHook
] ++ lib.optionals enableDocs [
sphinx
];
# For building runtime libs
depsBuildTarget = toolsForTarget;
buildInputs = [ perl bash ] ++ (libDeps hostPlatform);
depsTargetTarget = map lib.getDev (libDeps targetPlatform);
depsTargetTargetPropagated = map (lib.getOutput "out") (libDeps targetPlatform);
# required, because otherwise all symbols from HSffi.o are stripped, and
# that in turn causes GHCi to abort
stripDebugFlags = [ "-S" ] ++ lib.optional (!targetPlatform.isDarwin) "--keep-file-symbols";
checkTarget = "test";
hardeningDisable =
[ "format" ]
# In nixpkgs, musl based builds currently enable `pie` hardening by default
# (see `defaultHardeningFlags` in `make-derivation.nix`).
# But GHC cannot currently produce outputs that are ready for `-pie` linking.
# Thus, disable `pie` hardening, otherwise `recompile with -fPIE` errors appear.
# See:
# * https://github.com/NixOS/nixpkgs/issues/129247
# * https://gitlab.haskell.org/ghc/ghc/-/issues/19580
++ lib.optional stdenv.targetPlatform.isMusl "pie";
# big-parallel allows us to build with more than 2 cores on
# Hydra which already warrants a significant speedup
requiredSystemFeatures = [ "big-parallel" ];
postInstall = ''
# Install the bash completion file.
install -D -m 444 utils/completion/ghc.bash $out/share/bash-completion/completions/${targetPrefix}ghc
'';
passthru = {
inherit bootPkgs targetPrefix;
inherit llvmPackages;
inherit enableShared;
# This is used by the haskell builder to query
# the presence of the haddock program.
hasHaddock = enableHaddockProgram;
# Our Cabal compiler name
haskellCompilerName = "ghc-${version}";
};
meta = {
homepage = "http://haskell.org/ghc";
description = "The Glasgow Haskell Compiler";
maintainers = with lib.maintainers; [
guibou
] ++ lib.teams.haskell.members;
timeout = 24 * 3600;
inherit (ghc.meta) license platforms;
# ghcHEAD times out on aarch64-linux on Hydra.
hydraPlatforms = builtins.filter (p: p != "aarch64-linux") ghc.meta.platforms;
};
dontStrip = (targetPlatform.useAndroidPrebuilt || targetPlatform.isWasm);
} // lib.optionalAttrs targetPlatform.useAndroidPrebuilt{
dontPatchELF = true;
noAuditTmpdir = true;
})