haskell.compiler: port all make/native-bignum GHCs to common expr

The common expression is a little messy to avoid rebuilds. It can be
cleaned up in a second step.

`9.4.8.fixme.nix` is used temporarily so that git's rename detection
gets where common-make-native-bignum.nix is coming from.

8.10.7 keeps its expression since it uses integer-simple which changes
the expression's interface. This is unfortunately very annoying to
reflect in a common expression.

pkgs/development/compilers/ghc/9.0.2.nix

···
-{ lib, stdenv, pkgsBuildTarget, pkgsHostTarget, targetPackages
-
-# build-tools
-, bootPkgs
-, autoconf, automake, coreutils, fetchurl, perl, python3, m4, sphinx, xattr
-, autoSignDarwinBinariesHook
-, bash
-, fetchpatch
-
-, libiconv ? null, ncurses
-, glibcLocales ? null
-
-, # GHC can be built with system libffi or a bundled one.
-  libffi ? null
-
-, useLLVM ? !(stdenv.targetPlatform.isx86
-              || stdenv.targetPlatform.isPower
-              || stdenv.targetPlatform.isSparc)
-, # LLVM is conceptually a run-time-only dependency, 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
-                         && lib.meta.availableOn stdenv.targetPlatform gmp)
-, gmp
-
-, # If enabled, use -fPIC when compiling static libs.
-  enableRelocatedStaticLibs ? stdenv.targetPlatform != stdenv.hostPlatform
-
-, enableProfiledLibs ? true
-
-, # Whether to build dynamic libs for the standard library (on the target
-  # platform). Static libs are always built.
-  enableShared ? with stdenv.targetPlatform; !isWindows && !useiOSPrebuilt && !isStatic
-
-, # Whether to build terminfo.
-  enableTerminfo ? !stdenv.targetPlatform.isWindows
-
-, # 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 if we are building on musl because it's a large task to keep
-    # all `sphinx` dependencies building in this environment.
-    !stdenv.buildPlatform.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 = ''
-    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"}
-    # Build haddocks for boot packages with hyperlinking
-    EXTRA_HADDOCK_OPTS += --hyperlinked-source --quickjump
-
-    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 then "NO" else "YES"}
-    CrossCompilePrefix = ${targetPrefix}
-  '' + lib.optionalString (!enableProfiledLibs) ''
-    BUILD_PROF_LIBS = NO
-  '' +
-  # -fexternal-dynamic-refs apparently (because it's not clear from the documentation)
-  # makes the GHC RTS able to load static libraries, which may be needed for TemplateHaskell.
-  # This solution was described in https://www.tweag.io/blog/2020-09-30-bazel-static-haskell
-  lib.optionalString enableRelocatedStaticLibs ''
-    GhcLibHcOpts += -fPIC -fexternal-dynamic-refs
-    GhcRtsHcOpts += -fPIC -fexternal-dynamic-refs
-  '' + lib.optionalString targetPlatform.useAndroidPrebuilt ''
-    EXTRA_CC_OPTS += -std=gnu99
-  '';
-
-  # Splicer will pull out correct variations
-  libDeps = platform: lib.optional enableTerminfo ncurses
-    ++ [libffi]
-    ++ lib.optional (!enableNativeBignum) gmp
-    ++ lib.optional (platform.libc != "glibc" && !targetPlatform.isWindows) libiconv;
-
-  # 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 {
+import ./common-make-native-bignum.nix {
   version = "9.0.2";
-  pname = "${targetPrefix}ghc${variantSuffix}";
-
-  src = fetchurl {
-    url = "https://downloads.haskell.org/ghc/${version}/ghc-${version}-src.tar.xz";
-    sha256 = "140e42b96346322d1a39eb17602bcdc76e292028ad4a69286b230bab188a9197";
-  };
-
-  enableParallelBuilding = true;
-
-  outputs = [ "out" "doc" ];
-
-  patches = [
-    # Fix docs build with sphinx >= 6.0
-    # https://gitlab.haskell.org/ghc/ghc/-/issues/22766
-    (fetchpatch {
-      name = "ghc-docs-sphinx-6.0.patch";
-      url = "https://gitlab.haskell.org/ghc/ghc/-/commit/10e94a556b4f90769b7fd718b9790d58ae566600.patch";
-      sha256 = "0kmhfamr16w8gch0lgln2912r8aryjky1hfcda3jkcwa5cdzgjdv";
-    })
-    # Fix docs build with Sphinx >= 7 https://gitlab.haskell.org/ghc/ghc/-/issues/24129
-    ./docs-sphinx-7.patch
-    # fix hyperlinked haddock sources: https://github.com/haskell/haddock/pull/1482
-    (fetchpatch {
-      url = "https://patch-diff.githubusercontent.com/raw/haskell/haddock/pull/1482.patch";
-      sha256 = "sha256-8w8QUCsODaTvknCDGgTfFNZa8ZmvIKaKS+2ZJZ9foYk=";
-      extraPrefix = "utils/haddock/";
-      stripLen = 1;
-    })
-
-    # Add flag that fixes C++ exception handling; opt-in. Merged in 9.4 and 9.2.2.
-    # https://gitlab.haskell.org/ghc/ghc/-/merge_requests/7423
-    (fetchpatch {
-      name = "ghc-9.0.2-fcompact-unwind.patch";
-      # Note that the test suite is not packaged.
-      url = "https://gitlab.haskell.org/ghc/ghc/-/commit/c6132c782d974a7701e7f6447bdcd2bf6db4299a.patch?merge_request_iid=7423";
-      sha256 = "sha256-b4feGZIaKDj/UKjWTNY6/jH4s2iate0wAgMxG3rAbZI=";
-    })
-  ] ++ lib.optionals (stdenv.targetPlatform.isDarwin && stdenv.targetPlatform.isAarch64) [
-    # Prevent the paths module from emitting symbols that we don't use
-    # when building with separate outputs.
-    #
-    # These cause problems as they're not eliminated by GHC's dead code
-    # elimination on aarch64-darwin. (see
-    # https://github.com/NixOS/nixpkgs/issues/140774 for details).
-    ./Cabal-3.2-3.4-paths-fix-cycle-aarch64-darwin.patch
-  ];
-
-  postPatch = "patchShebangs .";
-
-  # GHC needs the locale configured during the Haddock phase.
-  LANG = "en_US.UTF-8";
-
-  # 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/${targetCC.targetPrefix}c++"
-    # Use gold to work around https://sourceware.org/bugzilla/show_bug.cgi?id=16177
-    export LD="${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"
-  '' + ''
-
-    echo -n "${buildMK}" > mk/build.mk
-    sed -i -e 's|-isysroot /Developer/SDKs/MacOSX10.5.sdk||' configure
-  '' + lib.optionalString (stdenv.isLinux && hostPlatform.libc == "glibc") ''
-    export LOCALE_ARCHIVE="${glibcLocales}/lib/locale/locale-archive"
-  '' + lib.optionalString (!stdenv.isDarwin) ''
-    export NIX_LDFLAGS+=" -rpath $out/lib/ghc-${version}"
-  '' + lib.optionalString stdenv.isDarwin ''
-    export NIX_LDFLAGS+=" -no_dtrace_dof"
-  '' + 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-includes=${ncurses.dev}/include" "--with-curses-libraries=${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.optionals (disableLargeAddressSpace) [
-    "--disable-large-address-space"
-  ];
-
-  # Make sure we never relax`$PATH` and hooks support for compatibility.
-  strictDeps = true;
-
-  # Don’t add -liconv to LDFLAGS automatically so that GHC will add it itself.
-  dontAddExtraLibs = true;
-
-  nativeBuildInputs = [
-    perl autoconf automake m4 python3
-    ghc bootPkgs.alex bootPkgs.happy bootPkgs.hscolour
-  ] ++ lib.optionals (stdenv.isDarwin && stdenv.isAarch64) [
-    autoSignDarwinBinariesHook
-  ] ++ lib.optionals enableDocs [
-    sphinx
-  ] ++ lib.optionals stdenv.isDarwin [
-    # TODO(@sternenseemann): backport addition of XATTR env var like
-    # https://gitlab.haskell.org/ghc/ghc/-/merge_requests/6447
-    xattr
-  ];
-
-  # 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;
-  };
-
-} // lib.optionalAttrs targetPlatform.useAndroidPrebuilt {
-  dontStrip = true;
-  dontPatchELF = true;
-  noAuditTmpdir = true;
-})
+  sha256 = "140e42b96346322d1a39eb17602bcdc76e292028ad4a69286b230bab188a9197";
+}

pkgs/development/compilers/ghc/9.2.5.nix

···
-{ lib, stdenv, pkgsBuildTarget, pkgsHostTarget, targetPackages
-
-# build-tools
-, bootPkgs
-, autoconf, automake, coreutils, fetchpatch, fetchurl, perl, python3, m4, sphinx
-, xattr, autoSignDarwinBinariesHook
-, bash
-
-, libiconv ? null, ncurses
-, glibcLocales ? null
-
-, # GHC can be built with system libffi or a bundled one.
-  libffi ? null
-
-, useLLVM ? !(stdenv.targetPlatform.isx86
-              || stdenv.targetPlatform.isPower
-              || stdenv.targetPlatform.isSparc
-              || stdenv.targetPlatform.isAarch64)
-, # LLVM is conceptually a run-time-only dependency, 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
-                         && lib.meta.availableOn stdenv.targetPlatform gmp)
-, gmp
-
-, # If enabled, use -fPIC when compiling static libs.
-  enableRelocatedStaticLibs ? stdenv.targetPlatform != stdenv.hostPlatform
-
-, enableProfiledLibs ? true
-
-, # Whether to build dynamic libs for the standard library (on the target
-  # platform). Static libs are always built.
-  enableShared ? with stdenv.targetPlatform; !isWindows && !useiOSPrebuilt && !isStatic
-
-, # Whether to build terminfo.
-  enableTerminfo ? !stdenv.targetPlatform.isWindows
-
-, # 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 if we are building on musl because it's a large task to keep
-    # all `sphinx` dependencies building in this environment.
-    !stdenv.buildPlatform.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 = ''
-    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"}
-    # Build haddocks for boot packages with hyperlinking
-    EXTRA_HADDOCK_OPTS += --hyperlinked-source --quickjump
-
-    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 then "NO" else "YES"}
-    CrossCompilePrefix = ${targetPrefix}
-  '' + lib.optionalString (!enableProfiledLibs) ''
-    BUILD_PROF_LIBS = NO
-  '' +
-  # -fexternal-dynamic-refs apparently (because it's not clear from the documentation)
-  # makes the GHC RTS able to load static libraries, which may be needed for TemplateHaskell.
-  # This solution was described in https://www.tweag.io/blog/2020-09-30-bazel-static-haskell
-  lib.optionalString enableRelocatedStaticLibs ''
-    GhcLibHcOpts += -fPIC -fexternal-dynamic-refs
-    GhcRtsHcOpts += -fPIC -fexternal-dynamic-refs
-  '' + lib.optionalString targetPlatform.useAndroidPrebuilt ''
-    EXTRA_CC_OPTS += -std=gnu99
-  '';
-
-  # Splicer will pull out correct variations
-  libDeps = platform: lib.optional enableTerminfo ncurses
-    ++ [libffi]
-    ++ lib.optional (!enableNativeBignum) gmp
-    ++ lib.optional (platform.libc != "glibc" && !targetPlatform.isWindows) libiconv;
-
-  # 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 {
+import ./common-make-native-bignum.nix {
   version = "9.2.5";
-  pname = "${targetPrefix}ghc${variantSuffix}";
-
-  src = fetchurl {
-    url = "https://downloads.haskell.org/ghc/${version}/ghc-${version}-src.tar.xz";
-    sha256 = "0606797d1b38e2d88ee2243f38ec6b9a1aa93e9b578e95f0de9a9c0a4144021c";
-  };
-
-  enableParallelBuilding = true;
-
-  outputs = [ "out" "doc" ];
-
-  patches = [
-    # Fix docs build with sphinx >= 6.0
-    # https://gitlab.haskell.org/ghc/ghc/-/issues/22766
-    (fetchpatch {
-      name = "ghc-docs-sphinx-6.0.patch";
-      url = "https://gitlab.haskell.org/ghc/ghc/-/commit/10e94a556b4f90769b7fd718b9790d58ae566600.patch";
-      sha256 = "0kmhfamr16w8gch0lgln2912r8aryjky1hfcda3jkcwa5cdzgjdv";
-    })
-    # Fix docs build with Sphinx >= 7 https://gitlab.haskell.org/ghc/ghc/-/issues/24129
-    ./docs-sphinx-7.patch
-    # fix hyperlinked haddock sources: https://github.com/haskell/haddock/pull/1482
-    (fetchpatch {
-      url = "https://patch-diff.githubusercontent.com/raw/haskell/haddock/pull/1482.patch";
-      sha256 = "sha256-8w8QUCsODaTvknCDGgTfFNZa8ZmvIKaKS+2ZJZ9foYk=";
-      extraPrefix = "utils/haddock/";
-      stripLen = 1;
-    })
-    # Don't generate code that doesn't compile when --enable-relocatable is passed to Setup.hs
-    # Can be removed if the Cabal library included with ghc backports the linked fix
-    (fetchpatch {
-      url = "https://github.com/haskell/cabal/commit/6c796218c92f93c95e94d5ec2d077f6956f68e98.patch";
-      stripLen = 1;
-      extraPrefix = "libraries/Cabal/";
-      sha256 = "sha256-yRQ6YmMiwBwiYseC5BsrEtDgFbWvst+maGgDtdD0vAY=";
-    })
-  ] ++ lib.optionals (stdenv.targetPlatform.isDarwin && stdenv.targetPlatform.isAarch64) [
-    # Prevent the paths module from emitting symbols that we don't use
-    # when building with separate outputs.
-    #
-    # These cause problems as they're not eliminated by GHC's dead code
-    # elimination on aarch64-darwin. (see
-    # https://github.com/NixOS/nixpkgs/issues/140774 for details).
-    ./Cabal-at-least-3.6-paths-fix-cycle-aarch64-darwin.patch
-  ];
-
-  postPatch = "patchShebangs .";
-
-  # GHC needs the locale configured during the Haddock phase.
-  LANG = "en_US.UTF-8";
-
-  # 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/${targetCC.targetPrefix}c++"
-    # Use gold to work around https://sourceware.org/bugzilla/show_bug.cgi?id=16177
-    export LD="${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"
-  '' + ''
-    echo -n "${buildMK}" > mk/build.mk
-  '' + lib.optionalString (stdenv.isLinux && hostPlatform.libc == "glibc") ''
-    export LOCALE_ARCHIVE="${glibcLocales}/lib/locale/locale-archive"
-  '' + 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-includes=${ncurses.dev}/include" "--with-curses-libraries=${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.optionals (disableLargeAddressSpace) [
-    "--disable-large-address-space"
-  ];
-
-  # Make sure we never relax`$PATH` and hooks support for compatibility.
-  strictDeps = true;
-
-  # Don’t add -liconv to LDFLAGS automatically so that GHC will add it itself.
-  dontAddExtraLibs = true;
-
-  nativeBuildInputs = [
-    perl autoconf 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;
-  };
-
-} // lib.optionalAttrs targetPlatform.useAndroidPrebuilt {
-  dontStrip = true;
-  dontPatchELF = true;
-  noAuditTmpdir = true;
-})
+  sha256 = "0606797d1b38e2d88ee2243f38ec6b9a1aa93e9b578e95f0de9a9c0a4144021c";
+}

pkgs/development/compilers/ghc/9.2.6.nix

···
-{ lib, stdenv, pkgsBuildTarget, pkgsHostTarget, targetPackages
-
-# build-tools
-, bootPkgs
-, autoconf, automake, coreutils, fetchpatch, fetchurl, perl, python3, m4, sphinx
-, xattr, autoSignDarwinBinariesHook
-, bash
-
-, libiconv ? null, ncurses
-, glibcLocales ? null
-
-, # GHC can be built with system libffi or a bundled one.
-  libffi ? null
-
-, useLLVM ? !(stdenv.targetPlatform.isx86
-              || stdenv.targetPlatform.isPower
-              || stdenv.targetPlatform.isSparc
-              || stdenv.targetPlatform.isAarch64)
-, # LLVM is conceptually a run-time-only dependency, 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
-                         && lib.meta.availableOn stdenv.targetPlatform gmp)
-, gmp
-
-, # If enabled, use -fPIC when compiling static libs.
-  enableRelocatedStaticLibs ? stdenv.targetPlatform != stdenv.hostPlatform
-
-, enableProfiledLibs ? true
-
-, # Whether to build dynamic libs for the standard library (on the target
-  # platform). Static libs are always built.
-  enableShared ? with stdenv.targetPlatform; !isWindows && !useiOSPrebuilt && !isStatic
-
-, # Whether to build terminfo.
-  enableTerminfo ? !stdenv.targetPlatform.isWindows
-
-, # 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 if we are building on musl because it's a large task to keep
-    # all `sphinx` dependencies building in this environment.
-    !stdenv.buildPlatform.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 = ''
-    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"}
-    # Build haddocks for boot packages with hyperlinking
-    EXTRA_HADDOCK_OPTS += --hyperlinked-source --quickjump
-
-    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 then "NO" else "YES"}
-    CrossCompilePrefix = ${targetPrefix}
-  '' + lib.optionalString (!enableProfiledLibs) ''
-    BUILD_PROF_LIBS = NO
-  '' +
-  # -fexternal-dynamic-refs apparently (because it's not clear from the documentation)
-  # makes the GHC RTS able to load static libraries, which may be needed for TemplateHaskell.
-  # This solution was described in https://www.tweag.io/blog/2020-09-30-bazel-static-haskell
-  lib.optionalString enableRelocatedStaticLibs ''
-    GhcLibHcOpts += -fPIC -fexternal-dynamic-refs
-    GhcRtsHcOpts += -fPIC -fexternal-dynamic-refs
-  '' + lib.optionalString targetPlatform.useAndroidPrebuilt ''
-    EXTRA_CC_OPTS += -std=gnu99
-  '';
-
-  # Splicer will pull out correct variations
-  libDeps = platform: lib.optional enableTerminfo ncurses
-    ++ [libffi]
-    ++ lib.optional (!enableNativeBignum) gmp
-    ++ lib.optional (platform.libc != "glibc" && !targetPlatform.isWindows) libiconv;
-
-  # 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 {
+import ./common-make-native-bignum.nix {
   version = "9.2.6";
-  pname = "${targetPrefix}ghc${variantSuffix}";
-
-  src = fetchurl {
-    url = "https://downloads.haskell.org/ghc/${version}/ghc-${version}-src.tar.xz";
-    sha256 = "7a54cf0398ad488b4ed219e15d1d1e64c0b6876c43a0564550dd11f0540d7305";
-  };
-
-  enableParallelBuilding = true;
-
-  outputs = [ "out" "doc" ];
-
-  patches = [
-    # Fix docs build with sphinx >= 6.0
-    # https://gitlab.haskell.org/ghc/ghc/-/issues/22766
-    (fetchpatch {
-      name = "ghc-docs-sphinx-6.0.patch";
-      url = "https://gitlab.haskell.org/ghc/ghc/-/commit/10e94a556b4f90769b7fd718b9790d58ae566600.patch";
-      sha256 = "0kmhfamr16w8gch0lgln2912r8aryjky1hfcda3jkcwa5cdzgjdv";
-    })
-    # Fix docs build with Sphinx >= 7 https://gitlab.haskell.org/ghc/ghc/-/issues/24129
-    ./docs-sphinx-7.patch
-    # fix hyperlinked haddock sources: https://github.com/haskell/haddock/pull/1482
-    (fetchpatch {
-      url = "https://patch-diff.githubusercontent.com/raw/haskell/haddock/pull/1482.patch";
-      sha256 = "sha256-8w8QUCsODaTvknCDGgTfFNZa8ZmvIKaKS+2ZJZ9foYk=";
-      extraPrefix = "utils/haddock/";
-      stripLen = 1;
-    })
-    # Don't generate code that doesn't compile when --enable-relocatable is passed to Setup.hs
-    # Can be removed if the Cabal library included with ghc backports the linked fix
-    (fetchpatch {
-      url = "https://github.com/haskell/cabal/commit/6c796218c92f93c95e94d5ec2d077f6956f68e98.patch";
-      stripLen = 1;
-      extraPrefix = "libraries/Cabal/";
-      sha256 = "sha256-yRQ6YmMiwBwiYseC5BsrEtDgFbWvst+maGgDtdD0vAY=";
-    })
-  ] ++ lib.optionals (stdenv.targetPlatform.isDarwin && stdenv.targetPlatform.isAarch64) [
-    # Prevent the paths module from emitting symbols that we don't use
-    # when building with separate outputs.
-    #
-    # These cause problems as they're not eliminated by GHC's dead code
-    # elimination on aarch64-darwin. (see
-    # https://github.com/NixOS/nixpkgs/issues/140774 for details).
-    ./Cabal-at-least-3.6-paths-fix-cycle-aarch64-darwin.patch
-  ];
-
-  postPatch = "patchShebangs .";
-
-  # GHC needs the locale configured during the Haddock phase.
-  LANG = "en_US.UTF-8";
-
-  # 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/${targetCC.targetPrefix}c++"
-    # Use gold to work around https://sourceware.org/bugzilla/show_bug.cgi?id=16177
-    export LD="${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"
-  '' + ''
-    echo -n "${buildMK}" > mk/build.mk
-  '' + lib.optionalString (stdenv.isLinux && hostPlatform.libc == "glibc") ''
-    export LOCALE_ARCHIVE="${glibcLocales}/lib/locale/locale-archive"
-  '' + 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-includes=${ncurses.dev}/include" "--with-curses-libraries=${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.optionals (disableLargeAddressSpace) [
-    "--disable-large-address-space"
-  ];
-
-  # Make sure we never relax`$PATH` and hooks support for compatibility.
-  strictDeps = true;
-
-  # Don’t add -liconv to LDFLAGS automatically so that GHC will add it itself.
-  dontAddExtraLibs = true;
-
-  nativeBuildInputs = [
-    perl autoconf 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;
-  };
-
-} // lib.optionalAttrs targetPlatform.useAndroidPrebuilt {
-  dontStrip = true;
-  dontPatchELF = true;
-  noAuditTmpdir = true;
-})
+  sha256 = "7a54cf0398ad488b4ed219e15d1d1e64c0b6876c43a0564550dd11f0540d7305";
+}

pkgs/development/compilers/ghc/9.2.7.nix

···
-{ lib, stdenv, pkgsBuildTarget, pkgsHostTarget, targetPackages
-
-# build-tools
-, bootPkgs
-, autoconf, automake, coreutils, fetchpatch, fetchurl, perl, python3, m4, sphinx
-, xattr, autoSignDarwinBinariesHook
-, bash
-
-, libiconv ? null, ncurses
-, glibcLocales ? null
-
-, # GHC can be built with system libffi or a bundled one.
-  libffi ? null
-
-, useLLVM ? !(stdenv.targetPlatform.isx86
-              || stdenv.targetPlatform.isPower
-              || stdenv.targetPlatform.isSparc
-              || stdenv.targetPlatform.isAarch64)
-, # LLVM is conceptually a run-time-only dependency, 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
-                         && lib.meta.availableOn stdenv.targetPlatform gmp)
-, gmp
-
-, # If enabled, use -fPIC when compiling static libs.
-  enableRelocatedStaticLibs ? stdenv.targetPlatform != stdenv.hostPlatform
-
-, enableProfiledLibs ? true
-
-, # Whether to build dynamic libs for the standard library (on the target
-  # platform). Static libs are always built.
-  enableShared ? with stdenv.targetPlatform; !isWindows && !useiOSPrebuilt && !isStatic
-
-, # Whether to build terminfo.
-  enableTerminfo ? !stdenv.targetPlatform.isWindows
-
-, # 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 if we are building on musl because it's a large task to keep
-    # all `sphinx` dependencies building in this environment.
-    !stdenv.buildPlatform.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 = ''
-    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"}
-    # Build haddocks for boot packages with hyperlinking
-    EXTRA_HADDOCK_OPTS += --hyperlinked-source --quickjump
-
-    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 then "NO" else "YES"}
-    CrossCompilePrefix = ${targetPrefix}
-  '' + lib.optionalString (!enableProfiledLibs) ''
-    BUILD_PROF_LIBS = NO
-  '' +
-  # -fexternal-dynamic-refs apparently (because it's not clear from the documentation)
-  # makes the GHC RTS able to load static libraries, which may be needed for TemplateHaskell.
-  # This solution was described in https://www.tweag.io/blog/2020-09-30-bazel-static-haskell
-  lib.optionalString enableRelocatedStaticLibs ''
-    GhcLibHcOpts += -fPIC -fexternal-dynamic-refs
-    GhcRtsHcOpts += -fPIC -fexternal-dynamic-refs
-  '' + lib.optionalString targetPlatform.useAndroidPrebuilt ''
-    EXTRA_CC_OPTS += -std=gnu99
-  '';
-
-  # Splicer will pull out correct variations
-  libDeps = platform: lib.optional enableTerminfo ncurses
-    ++ [libffi]
-    ++ lib.optional (!enableNativeBignum) gmp
-    ++ lib.optional (platform.libc != "glibc" && !targetPlatform.isWindows) libiconv;
-
-  # 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 {
+import ./common-make-native-bignum.nix {
   version = "9.2.7";
-  pname = "${targetPrefix}ghc${variantSuffix}";
-
-  src = fetchurl {
-    url = "https://downloads.haskell.org/ghc/${version}/ghc-${version}-src.tar.xz";
-    sha256 = "a253567a17b734a4c0dd0ffa296d33c2a5b5a54a77df988806a2a1e1ca7e88b8";
-  };
-
-  enableParallelBuilding = true;
-
-  outputs = [ "out" "doc" ];
-
-  patches = [
-    # Fix docs build with sphinx >= 6.0
-    # https://gitlab.haskell.org/ghc/ghc/-/issues/22766
-    (fetchpatch {
-      name = "ghc-docs-sphinx-6.0.patch";
-      url = "https://gitlab.haskell.org/ghc/ghc/-/commit/10e94a556b4f90769b7fd718b9790d58ae566600.patch";
-      sha256 = "0kmhfamr16w8gch0lgln2912r8aryjky1hfcda3jkcwa5cdzgjdv";
-    })
-    # Fix docs build with Sphinx >= 7 https://gitlab.haskell.org/ghc/ghc/-/issues/24129
-    ./docs-sphinx-7.patch
-    # fix hyperlinked haddock sources: https://github.com/haskell/haddock/pull/1482
-    (fetchpatch {
-      url = "https://patch-diff.githubusercontent.com/raw/haskell/haddock/pull/1482.patch";
-      sha256 = "sha256-8w8QUCsODaTvknCDGgTfFNZa8ZmvIKaKS+2ZJZ9foYk=";
-      extraPrefix = "utils/haddock/";
-      stripLen = 1;
-    })
-    # Don't generate code that doesn't compile when --enable-relocatable is passed to Setup.hs
-    # Can be removed if the Cabal library included with ghc backports the linked fix
-    (fetchpatch {
-      url = "https://github.com/haskell/cabal/commit/6c796218c92f93c95e94d5ec2d077f6956f68e98.patch";
-      stripLen = 1;
-      extraPrefix = "libraries/Cabal/";
-      sha256 = "sha256-yRQ6YmMiwBwiYseC5BsrEtDgFbWvst+maGgDtdD0vAY=";
-    })
-  ] ++ lib.optionals (stdenv.targetPlatform.isDarwin && stdenv.targetPlatform.isAarch64) [
-    # Prevent the paths module from emitting symbols that we don't use
-    # when building with separate outputs.
-    #
-    # These cause problems as they're not eliminated by GHC's dead code
-    # elimination on aarch64-darwin. (see
-    # https://github.com/NixOS/nixpkgs/issues/140774 for details).
-    ./Cabal-at-least-3.6-paths-fix-cycle-aarch64-darwin.patch
-  ];
-
-  postPatch = "patchShebangs .";
-
-  # GHC needs the locale configured during the Haddock phase.
-  LANG = "en_US.UTF-8";
-
-  # 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/${targetCC.targetPrefix}c++"
-    # Use gold to work around https://sourceware.org/bugzilla/show_bug.cgi?id=16177
-    export LD="${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"
-  '' + ''
-    echo -n "${buildMK}" > mk/build.mk
-  '' + lib.optionalString (stdenv.isLinux && hostPlatform.libc == "glibc") ''
-    export LOCALE_ARCHIVE="${glibcLocales}/lib/locale/locale-archive"
-  '' + 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-includes=${ncurses.dev}/include" "--with-curses-libraries=${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.optionals (disableLargeAddressSpace) [
-    "--disable-large-address-space"
-  ];
-
-  # Make sure we never relax`$PATH` and hooks support for compatibility.
-  strictDeps = true;
-
-  # Don’t add -liconv to LDFLAGS automatically so that GHC will add it itself.
-  dontAddExtraLibs = true;
-
-  nativeBuildInputs = [
-    perl autoconf 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;
-  };
-
-} // lib.optionalAttrs targetPlatform.useAndroidPrebuilt {
-  dontStrip = true;
-  dontPatchELF = true;
-  noAuditTmpdir = true;
-})
+  sha256 = "a253567a17b734a4c0dd0ffa296d33c2a5b5a54a77df988806a2a1e1ca7e88b8";
+}

pkgs/development/compilers/ghc/9.2.8.nix

···
-{ lib, stdenv, pkgsBuildTarget, pkgsHostTarget, targetPackages
-
-# build-tools
-, bootPkgs
-, autoconf, automake, coreutils, fetchpatch, fetchurl, perl, python3, m4, sphinx
-, xattr, autoSignDarwinBinariesHook
-, bash
-
-, libiconv ? null, ncurses
-, glibcLocales ? null
-
-, # GHC can be built with system libffi or a bundled one.
-  libffi ? null
-
-, useLLVM ? !(stdenv.targetPlatform.isx86
-              || stdenv.targetPlatform.isPower
-              || stdenv.targetPlatform.isSparc
-              || stdenv.targetPlatform.isAarch64)
-, # LLVM is conceptually a run-time-only dependency, 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
-                         && lib.meta.availableOn stdenv.targetPlatform gmp)
-, gmp
-
-, # If enabled, use -fPIC when compiling static libs.
-  enableRelocatedStaticLibs ? stdenv.targetPlatform != stdenv.hostPlatform
-
-, enableProfiledLibs ? true
-
-, # Whether to build dynamic libs for the standard library (on the target
-  # platform). Static libs are always built.
-  enableShared ? with stdenv.targetPlatform; !isWindows && !useiOSPrebuilt && !isStatic
-
-, # Whether to build terminfo.
-  enableTerminfo ? !stdenv.targetPlatform.isWindows
-
-, # 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 if we are building on musl because it's a large task to keep
-    # all `sphinx` dependencies building in this environment.
-    !stdenv.buildPlatform.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 = ''
-    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"}
-    # Build haddocks for boot packages with hyperlinking
-    EXTRA_HADDOCK_OPTS += --hyperlinked-source --quickjump
-
-    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 then "NO" else "YES"}
-    CrossCompilePrefix = ${targetPrefix}
-  '' + lib.optionalString (!enableProfiledLibs) ''
-    BUILD_PROF_LIBS = NO
-  '' +
-  # -fexternal-dynamic-refs apparently (because it's not clear from the documentation)
-  # makes the GHC RTS able to load static libraries, which may be needed for TemplateHaskell.
-  # This solution was described in https://www.tweag.io/blog/2020-09-30-bazel-static-haskell
-  lib.optionalString enableRelocatedStaticLibs ''
-    GhcLibHcOpts += -fPIC -fexternal-dynamic-refs
-    GhcRtsHcOpts += -fPIC -fexternal-dynamic-refs
-  '' + lib.optionalString targetPlatform.useAndroidPrebuilt ''
-    EXTRA_CC_OPTS += -std=gnu99
-  '';
-
-  # Splicer will pull out correct variations
-  libDeps = platform: lib.optional enableTerminfo ncurses
-    ++ [libffi]
-    ++ lib.optional (!enableNativeBignum) gmp
-    ++ lib.optional (platform.libc != "glibc" && !targetPlatform.isWindows) libiconv;
-
-  # 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 {
+import ./common-make-native-bignum.nix {
   version = "9.2.8";
-  pname = "${targetPrefix}ghc${variantSuffix}";
-
-  src = fetchurl {
-    url = "https://downloads.haskell.org/ghc/${version}/ghc-${version}-src.tar.xz";
-    sha256 = "sha256-XxPReGv0/RL0tF+qN6vttbs/NtXlj32lMH6L/oilZ6E=";
-  };
-
-  enableParallelBuilding = true;
-
-  outputs = [ "out" "doc" ];
-
-  patches = [
-    # Fix docs build with sphinx >= 6.0
-    # https://gitlab.haskell.org/ghc/ghc/-/issues/22766
-    (fetchpatch {
-      name = "ghc-docs-sphinx-6.0.patch";
-      url = "https://gitlab.haskell.org/ghc/ghc/-/commit/10e94a556b4f90769b7fd718b9790d58ae566600.patch";
-      sha256 = "0kmhfamr16w8gch0lgln2912r8aryjky1hfcda3jkcwa5cdzgjdv";
-    })
-    # Fix docs build with Sphinx >= 7 https://gitlab.haskell.org/ghc/ghc/-/issues/24129
-    ./docs-sphinx-7.patch
-    # fix hyperlinked haddock sources: https://github.com/haskell/haddock/pull/1482
-    (fetchpatch {
-      url = "https://patch-diff.githubusercontent.com/raw/haskell/haddock/pull/1482.patch";
-      sha256 = "sha256-8w8QUCsODaTvknCDGgTfFNZa8ZmvIKaKS+2ZJZ9foYk=";
-      extraPrefix = "utils/haddock/";
-      stripLen = 1;
-    })
-    # Don't generate code that doesn't compile when --enable-relocatable is passed to Setup.hs
-    # Can be removed if the Cabal library included with ghc backports the linked fix
-    (fetchpatch {
-      url = "https://github.com/haskell/cabal/commit/6c796218c92f93c95e94d5ec2d077f6956f68e98.patch";
-      stripLen = 1;
-      extraPrefix = "libraries/Cabal/";
-      sha256 = "sha256-yRQ6YmMiwBwiYseC5BsrEtDgFbWvst+maGgDtdD0vAY=";
-    })
-  ] ++ lib.optionals (stdenv.targetPlatform.isDarwin && stdenv.targetPlatform.isAarch64) [
-    # Prevent the paths module from emitting symbols that we don't use
-    # when building with separate outputs.
-    #
-    # These cause problems as they're not eliminated by GHC's dead code
-    # elimination on aarch64-darwin. (see
-    # https://github.com/NixOS/nixpkgs/issues/140774 for details).
-    ./Cabal-at-least-3.6-paths-fix-cycle-aarch64-darwin.patch
-  ];
-
-  postPatch = "patchShebangs .";
-
-  # GHC needs the locale configured during the Haddock phase.
-  LANG = "en_US.UTF-8";
-
-  # 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/${targetCC.targetPrefix}c++"
-    # Use gold to work around https://sourceware.org/bugzilla/show_bug.cgi?id=16177
-    export LD="${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"
-  '' + ''
-    echo -n "${buildMK}" > mk/build.mk
-  '' + lib.optionalString (stdenv.isLinux && hostPlatform.libc == "glibc") ''
-    export LOCALE_ARCHIVE="${glibcLocales}/lib/locale/locale-archive"
-  '' + 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-includes=${ncurses.dev}/include" "--with-curses-libraries=${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.optionals (disableLargeAddressSpace) [
-    "--disable-large-address-space"
-  ];
-
-  # Make sure we never relax`$PATH` and hooks support for compatibility.
-  strictDeps = true;
-
-  # Don’t add -liconv to LDFLAGS automatically so that GHC will add it itself.
-  dontAddExtraLibs = true;
-
-  nativeBuildInputs = [
-    perl autoconf 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;
-  };
-
-} // lib.optionalAttrs targetPlatform.useAndroidPrebuilt {
-  dontStrip = true;
-  dontPatchELF = true;
-  noAuditTmpdir = true;
-})
+  sha256 = "sha256-XxPReGv0/RL0tF+qN6vttbs/NtXlj32lMH6L/oilZ6E=";
+}

pkgs/development/compilers/ghc/9.4.5.nix

···
 # DO NOT port this expression to hadrian. It is not possible to build a GHC
 # cross compiler with 9.4.* and hadrian.
-{ lib, stdenv, pkgsBuildTarget, pkgsHostTarget, targetPackages
-
-# build-tools
-, bootPkgs
-, autoconf, automake, coreutils, fetchpatch, fetchurl, perl, python3, m4, sphinx
-, xattr, autoSignDarwinBinariesHook
-, bash
-
-, libiconv ? null, ncurses
-, glibcLocales ? null
-
-, # GHC can be built with system libffi or a bundled one.
-  libffi ? null
-
-, useLLVM ? !(stdenv.targetPlatform.isx86
-              || stdenv.targetPlatform.isPower
-              || stdenv.targetPlatform.isSparc
-              || stdenv.targetPlatform.isAarch64)
-, # LLVM is conceptually a run-time-only dependency, 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
-                         && lib.meta.availableOn stdenv.targetPlatform gmp)
-, gmp
-
-, # If enabled, use -fPIC when compiling static libs.
-  enableRelocatedStaticLibs ? stdenv.targetPlatform != stdenv.hostPlatform
-
-, enableProfiledLibs ? true
-
-, # Whether to build dynamic libs for the standard library (on the target
-  # platform). Static libs are always built.
-  enableShared ? with stdenv.targetPlatform; !isWindows && !useiOSPrebuilt && !isStatic
-
-, # Whether to build terminfo.
-  enableTerminfo ? !stdenv.targetPlatform.isWindows
-
-, # 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 if we are building on musl because it's a large task to keep
-    # all `sphinx` dependencies building in this environment.
-    !stdenv.buildPlatform.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 = ''
-    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"}
-    # Build haddocks for boot packages with hyperlinking
-    EXTRA_HADDOCK_OPTS += --hyperlinked-source --quickjump
-
-    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 then "NO" else "YES"}
-    CrossCompilePrefix = ${targetPrefix}
-  '' + lib.optionalString (!enableProfiledLibs) ''
-    BUILD_PROF_LIBS = NO
-  '' +
-  # -fexternal-dynamic-refs apparently (because it's not clear from the documentation)
-  # makes the GHC RTS able to load static libraries, which may be needed for TemplateHaskell.
-  # This solution was described in https://www.tweag.io/blog/2020-09-30-bazel-static-haskell
-  lib.optionalString enableRelocatedStaticLibs ''
-    GhcLibHcOpts += -fPIC -fexternal-dynamic-refs
-    GhcRtsHcOpts += -fPIC -fexternal-dynamic-refs
-  '' + lib.optionalString targetPlatform.useAndroidPrebuilt ''
-    EXTRA_CC_OPTS += -std=gnu99
-  '';
-
-  # Splicer will pull out correct variations
-  libDeps = platform: lib.optional enableTerminfo ncurses
-    ++ [libffi]
-    ++ lib.optional (!enableNativeBignum) gmp
-    ++ lib.optional (platform.libc != "glibc" && !targetPlatform.isWindows) libiconv;
-
-  # 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 {
+import ./common-make-native-bignum.nix {
   version = "9.4.5";
-  pname = "${targetPrefix}ghc${variantSuffix}";
-
-  src = fetchurl {
-    url = "https://downloads.haskell.org/ghc/${version}/ghc-${version}-src.tar.xz";
-    sha256 = "6256cf9caf6d6dc7b611dcfbb247df2d528e85aa39d22a698e870e5a590e8601";
-  };
-
-  enableParallelBuilding = true;
-
-  outputs = [ "out" "doc" ];
-
-  patches = [
-    # Don't generate code that doesn't compile when --enable-relocatable is passed to Setup.hs
-    # Can be removed if the Cabal library included with ghc backports the linked fix
-    (fetchpatch {
-      url = "https://github.com/haskell/cabal/commit/6c796218c92f93c95e94d5ec2d077f6956f68e98.patch";
-      stripLen = 1;
-      extraPrefix = "libraries/Cabal/";
-      sha256 = "sha256-yRQ6YmMiwBwiYseC5BsrEtDgFbWvst+maGgDtdD0vAY=";
-    })
-
-    # Fix docs build with sphinx >= 6.0
-    # https://gitlab.haskell.org/ghc/ghc/-/issues/22766
-    (fetchpatch {
-      name = "ghc-docs-sphinx-6.0.patch";
-      url = "https://gitlab.haskell.org/ghc/ghc/-/commit/10e94a556b4f90769b7fd718b9790d58ae566600.patch";
-      sha256 = "0kmhfamr16w8gch0lgln2912r8aryjky1hfcda3jkcwa5cdzgjdv";
-    })
-
-    # Fix docs build with Sphinx >= 7 https://gitlab.haskell.org/ghc/ghc/-/issues/24129
-    ./docs-sphinx-7.patch
-  ] ++ lib.optionals (stdenv.targetPlatform.isDarwin && stdenv.targetPlatform.isAarch64) [
-    # Prevent the paths module from emitting symbols that we don't use
-    # when building with separate outputs.
-    #
-    # These cause problems as they're not eliminated by GHC's dead code
-    # elimination on aarch64-darwin. (see
-    # https://github.com/NixOS/nixpkgs/issues/140774 for details).
-    ./Cabal-at-least-3.6-paths-fix-cycle-aarch64-darwin.patch
-  ];
-
-  postPatch = "patchShebangs .";
-
-  # GHC needs the locale configured during the Haddock phase.
-  LANG = "en_US.UTF-8";
-
-  # 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/${targetCC.targetPrefix}c++"
-    # Use gold to work around https://sourceware.org/bugzilla/show_bug.cgi?id=16177
-    export LD="${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"
-  '' + ''
-
-    echo -n "${buildMK}" > mk/build.mk
-
-    sed -i -e 's|-isysroot /Developer/SDKs/MacOSX10.5.sdk||' configure
-  '' + lib.optionalString (stdenv.isLinux && hostPlatform.libc == "glibc") ''
-    export LOCALE_ARCHIVE="${glibcLocales}/lib/locale/locale-archive"
-  '' + 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 $x \
-          --replace '*-android*|*-gnueabi*)' \
-                    '*-android*|*-gnueabi*|*-musleabi*)'
-      done
-  ''
-  # HACK: allow bootstrapping with GHC 8.10 which works fine, as we don't have
-  # binary 9.0 packaged. Bootstrapping with 9.2 is broken without hadrian.
-  + ''
-    substituteInPlace configure --replace \
-      'MinBootGhcVersion="9.0"' \
-      'MinBootGhcVersion="8.10"'
-  '';
-
-  # TODO(@Ericson2314): Always pass "--target" and always prefix.
-  configurePlatforms = [ "build" "host" ]
-    ++ lib.optional (targetPlatform != hostPlatform) "target";
-
-  # `--with` flags for libraries needed for RTS linker
-  configureFlags = [
-    "--datadir=$doc/share/doc/ghc"
-    "--with-curses-includes=${ncurses.dev}/include" "--with-curses-libraries=${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.optionals (disableLargeAddressSpace) [
-    "--disable-large-address-space"
-  ];
-
-  # Make sure we never relax`$PATH` and hooks support for compatibility.
-  strictDeps = true;
-
-  # Don’t add -liconv to LDFLAGS automatically so that GHC will add it itself.
-  dontAddExtraLibs = true;
-
-  nativeBuildInputs = [
-    perl autoconf 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;
-  };
-
-} // lib.optionalAttrs targetPlatform.useAndroidPrebuilt {
-  dontStrip = true;
-  dontPatchELF = true;
-  noAuditTmpdir = true;
-})
+  sha256 = "6256cf9caf6d6dc7b611dcfbb247df2d528e85aa39d22a698e870e5a590e8601";
+}

pkgs/development/compilers/ghc/9.4.6.nix

···
 # DO NOT port this expression to hadrian. It is not possible to build a GHC
 # cross compiler with 9.4.* and hadrian.
-{ lib, stdenv, pkgsBuildTarget, pkgsHostTarget, targetPackages
-
-# build-tools
-, bootPkgs
-, autoconf, automake, coreutils, fetchpatch, fetchurl, perl, python3, m4, sphinx
-, xattr, autoSignDarwinBinariesHook
-, bash
-
-, libiconv ? null, ncurses
-, glibcLocales ? null
-
-, # GHC can be built with system libffi or a bundled one.
-  libffi ? null
-
-, useLLVM ? !(stdenv.targetPlatform.isx86
-              || stdenv.targetPlatform.isPower
-              || stdenv.targetPlatform.isSparc
-              || stdenv.targetPlatform.isAarch64)
-, # LLVM is conceptually a run-time-only dependency, 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
-                         && lib.meta.availableOn stdenv.targetPlatform gmp)
-, gmp
-
-, # If enabled, use -fPIC when compiling static libs.
-  enableRelocatedStaticLibs ? stdenv.targetPlatform != stdenv.hostPlatform
-
-, enableProfiledLibs ? true
-
-, # Whether to build dynamic libs for the standard library (on the target
-  # platform). Static libs are always built.
-  enableShared ? with stdenv.targetPlatform; !isWindows && !useiOSPrebuilt && !isStatic
-
-, # Whether to build terminfo.
-  enableTerminfo ? !stdenv.targetPlatform.isWindows
-
-, # 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 if we are building on musl because it's a large task to keep
-    # all `sphinx` dependencies building in this environment.
-    !stdenv.buildPlatform.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 = ''
-    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"}
-    # Build haddocks for boot packages with hyperlinking
-    EXTRA_HADDOCK_OPTS += --hyperlinked-source --quickjump
-
-    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 then "NO" else "YES"}
-    CrossCompilePrefix = ${targetPrefix}
-  '' + lib.optionalString (!enableProfiledLibs) ''
-    BUILD_PROF_LIBS = NO
-  '' +
-  # -fexternal-dynamic-refs apparently (because it's not clear from the documentation)
-  # makes the GHC RTS able to load static libraries, which may be needed for TemplateHaskell.
-  # This solution was described in https://www.tweag.io/blog/2020-09-30-bazel-static-haskell
-  lib.optionalString enableRelocatedStaticLibs ''
-    GhcLibHcOpts += -fPIC -fexternal-dynamic-refs
-    GhcRtsHcOpts += -fPIC -fexternal-dynamic-refs
-  '' + lib.optionalString targetPlatform.useAndroidPrebuilt ''
-    EXTRA_CC_OPTS += -std=gnu99
-  '';
-
-  # Splicer will pull out correct variations
-  libDeps = platform: lib.optional enableTerminfo ncurses
-    ++ [libffi]
-    ++ lib.optional (!enableNativeBignum) gmp
-    ++ lib.optional (platform.libc != "glibc" && !targetPlatform.isWindows) libiconv;
-
-  # 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 {
+import ./common-make-native-bignum.nix {
   version = "9.4.6";
-  pname = "${targetPrefix}ghc${variantSuffix}";
-
-  src = fetchurl {
-    url = "https://downloads.haskell.org/ghc/${version}/ghc-${version}-src.tar.xz";
-    sha256 = "1b705cf52692f9d4d6707cdf8e761590f5f56ec8ea6a65e36610db392d3d24b9";
-  };
-
-  enableParallelBuilding = true;
-
-  outputs = [ "out" "doc" ];
-
-  patches = [
-    # Don't generate code that doesn't compile when --enable-relocatable is passed to Setup.hs
-    # Can be removed if the Cabal library included with ghc backports the linked fix
-    (fetchpatch {
-      url = "https://github.com/haskell/cabal/commit/6c796218c92f93c95e94d5ec2d077f6956f68e98.patch";
-      stripLen = 1;
-      extraPrefix = "libraries/Cabal/";
-      sha256 = "sha256-yRQ6YmMiwBwiYseC5BsrEtDgFbWvst+maGgDtdD0vAY=";
-    })
-
-    # Fix docs build with Sphinx >= 7 https://gitlab.haskell.org/ghc/ghc/-/issues/24129
-    ./docs-sphinx-7.patch
-
-    # Work around a type not being defined when including Rts.h in bytestring's cbits
-    # due to missing feature macros. See https://gitlab.haskell.org/ghc/ghc/-/issues/23810.
-    ./9.4.6-bytestring-posix-source.patch
-  ] ++ lib.optionals (stdenv.targetPlatform.isDarwin && stdenv.targetPlatform.isAarch64) [
-    # Prevent the paths module from emitting symbols that we don't use
-    # when building with separate outputs.
-    #
-    # These cause problems as they're not eliminated by GHC's dead code
-    # elimination on aarch64-darwin. (see
-    # https://github.com/NixOS/nixpkgs/issues/140774 for details).
-    ./Cabal-at-least-3.6-paths-fix-cycle-aarch64-darwin.patch
-  ];
-
-  postPatch = "patchShebangs .";
-
-  # GHC needs the locale configured during the Haddock phase.
-  LANG = "en_US.UTF-8";
-
-  # 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/${targetCC.targetPrefix}c++"
-    # Use gold to work around https://sourceware.org/bugzilla/show_bug.cgi?id=16177
-    export LD="${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"
-  '' + ''
-
-    echo -n "${buildMK}" > mk/build.mk
-
-    sed -i -e 's|-isysroot /Developer/SDKs/MacOSX10.5.sdk||' configure
-  '' + lib.optionalString (stdenv.isLinux && hostPlatform.libc == "glibc") ''
-    export LOCALE_ARCHIVE="${glibcLocales}/lib/locale/locale-archive"
-  '' + 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 $x \
-          --replace '*-android*|*-gnueabi*)' \
-                    '*-android*|*-gnueabi*|*-musleabi*)'
-      done
-  ''
-  # HACK: allow bootstrapping with GHC 8.10 which works fine, as we don't have
-  # binary 9.0 packaged. Bootstrapping with 9.2 is broken without hadrian.
-  + ''
-    substituteInPlace configure --replace \
-      'MinBootGhcVersion="9.0"' \
-      'MinBootGhcVersion="8.10"'
-  '';
-
-  # TODO(@Ericson2314): Always pass "--target" and always prefix.
-  configurePlatforms = [ "build" "host" ]
-    ++ lib.optional (targetPlatform != hostPlatform) "target";
-
-  # `--with` flags for libraries needed for RTS linker
-  configureFlags = [
-    "--datadir=$doc/share/doc/ghc"
-    "--with-curses-includes=${ncurses.dev}/include" "--with-curses-libraries=${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.optionals (disableLargeAddressSpace) [
-    "--disable-large-address-space"
-  ];
-
-  # Make sure we never relax`$PATH` and hooks support for compatibility.
-  strictDeps = true;
-
-  # Don’t add -liconv to LDFLAGS automatically so that GHC will add it itself.
-  dontAddExtraLibs = true;
-
-  nativeBuildInputs = [
-    perl autoconf 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;
-  };
-
-} // lib.optionalAttrs targetPlatform.useAndroidPrebuilt {
-  dontStrip = true;
-  dontPatchELF = true;
-  noAuditTmpdir = true;
-})
+  sha256 = "1b705cf52692f9d4d6707cdf8e761590f5f56ec8ea6a65e36610db392d3d24b9";
+}

pkgs/development/compilers/ghc/9.4.7.nix

···
 # DO NOT port this expression to hadrian. It is not possible to build a GHC
 # cross compiler with 9.4.* and hadrian.
-{ lib, stdenv, pkgsBuildTarget, pkgsHostTarget, targetPackages
-
-# build-tools
-, bootPkgs
-, autoconf, automake, coreutils, fetchpatch, fetchurl, perl, python3, m4, sphinx
-, xattr, autoSignDarwinBinariesHook
-, bash
-
-, libiconv ? null, ncurses
-, glibcLocales ? null
-
-, # GHC can be built with system libffi or a bundled one.
-  libffi ? null
-
-, useLLVM ? !(stdenv.targetPlatform.isx86
-              || stdenv.targetPlatform.isPower
-              || stdenv.targetPlatform.isSparc
-              || stdenv.targetPlatform.isAarch64)
-, # LLVM is conceptually a run-time-only dependency, 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
-                         && lib.meta.availableOn stdenv.targetPlatform gmp)
-, gmp
-
-, # If enabled, use -fPIC when compiling static libs.
-  enableRelocatedStaticLibs ? stdenv.targetPlatform != stdenv.hostPlatform
-
-, enableProfiledLibs ? true
-
-, # Whether to build dynamic libs for the standard library (on the target
-  # platform). Static libs are always built.
-  enableShared ? with stdenv.targetPlatform; !isWindows && !useiOSPrebuilt && !isStatic
-
-, # Whether to build terminfo.
-  enableTerminfo ? !stdenv.targetPlatform.isWindows
-
-, # 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 if we are building on musl because it's a large task to keep
-    # all `sphinx` dependencies building in this environment.
-    !stdenv.buildPlatform.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 = ''
-    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"}
-    # Build haddocks for boot packages with hyperlinking
-    EXTRA_HADDOCK_OPTS += --hyperlinked-source --quickjump
-
-    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 then "NO" else "YES"}
-    CrossCompilePrefix = ${targetPrefix}
-  '' + lib.optionalString (!enableProfiledLibs) ''
-    BUILD_PROF_LIBS = NO
-  '' +
-  # -fexternal-dynamic-refs apparently (because it's not clear from the documentation)
-  # makes the GHC RTS able to load static libraries, which may be needed for TemplateHaskell.
-  # This solution was described in https://www.tweag.io/blog/2020-09-30-bazel-static-haskell
-  lib.optionalString enableRelocatedStaticLibs ''
-    GhcLibHcOpts += -fPIC -fexternal-dynamic-refs
-    GhcRtsHcOpts += -fPIC -fexternal-dynamic-refs
-  '' + lib.optionalString targetPlatform.useAndroidPrebuilt ''
-    EXTRA_CC_OPTS += -std=gnu99
-  '';
-
-  # Splicer will pull out correct variations
-  libDeps = platform: lib.optional enableTerminfo ncurses
-    ++ [libffi]
-    ++ lib.optional (!enableNativeBignum) gmp
-    ++ lib.optional (platform.libc != "glibc" && !targetPlatform.isWindows) libiconv;
-
-  # 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 {
+import ./common-make-native-bignum.nix {
   version = "9.4.7";
-  pname = "${targetPrefix}ghc${variantSuffix}";
-
-  src = fetchurl {
-    url = "https://downloads.haskell.org/ghc/${version}/ghc-${version}-src.tar.xz";
-    sha256 = "06775a52b4d13ac09edc6dabc299fd11e59d8886bbcae450af367baee2684c8f";
-  };
-
-  enableParallelBuilding = true;
-
-  outputs = [ "out" "doc" ];
-
-  patches = [
-    # Don't generate code that doesn't compile when --enable-relocatable is passed to Setup.hs
-    # Can be removed if the Cabal library included with ghc backports the linked fix
-    (fetchpatch {
-      url = "https://github.com/haskell/cabal/commit/6c796218c92f93c95e94d5ec2d077f6956f68e98.patch";
-      stripLen = 1;
-      extraPrefix = "libraries/Cabal/";
-      sha256 = "sha256-yRQ6YmMiwBwiYseC5BsrEtDgFbWvst+maGgDtdD0vAY=";
-    })
-
-    # Fix docs build with Sphinx >= 7 https://gitlab.haskell.org/ghc/ghc/-/issues/24129
-    ./docs-sphinx-7.patch
-  ] ++ lib.optionals (stdenv.targetPlatform.isDarwin && stdenv.targetPlatform.isAarch64) [
-    # Prevent the paths module from emitting symbols that we don't use
-    # when building with separate outputs.
-    #
-    # These cause problems as they're not eliminated by GHC's dead code
-    # elimination on aarch64-darwin. (see
-    # https://github.com/NixOS/nixpkgs/issues/140774 for details).
-    ./Cabal-at-least-3.6-paths-fix-cycle-aarch64-darwin.patch
-  ];
-
-  postPatch = "patchShebangs .";
-
-  # GHC needs the locale configured during the Haddock phase.
-  LANG = "en_US.UTF-8";
-
-  # 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/${targetCC.targetPrefix}c++"
-    # Use gold to work around https://sourceware.org/bugzilla/show_bug.cgi?id=16177
-    export LD="${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"
-  '' + ''
-
-    echo -n "${buildMK}" > mk/build.mk
-
-    sed -i -e 's|-isysroot /Developer/SDKs/MacOSX10.5.sdk||' configure
-  '' + lib.optionalString (stdenv.isLinux && hostPlatform.libc == "glibc") ''
-    export LOCALE_ARCHIVE="${glibcLocales}/lib/locale/locale-archive"
-  '' + 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 $x \
-          --replace '*-android*|*-gnueabi*)' \
-                    '*-android*|*-gnueabi*|*-musleabi*)'
-      done
-  ''
-  # HACK: allow bootstrapping with GHC 8.10 which works fine, as we don't have
-  # binary 9.0 packaged. Bootstrapping with 9.2 is broken without hadrian.
-  + ''
-    substituteInPlace configure --replace \
-      'MinBootGhcVersion="9.0"' \
-      'MinBootGhcVersion="8.10"'
-  '';
-
-  # TODO(@Ericson2314): Always pass "--target" and always prefix.
-  configurePlatforms = [ "build" "host" ]
-    ++ lib.optional (targetPlatform != hostPlatform) "target";
-
-  # `--with` flags for libraries needed for RTS linker
-  configureFlags = [
-    "--datadir=$doc/share/doc/ghc"
-    "--with-curses-includes=${ncurses.dev}/include" "--with-curses-libraries=${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.optionals (disableLargeAddressSpace) [
-    "--disable-large-address-space"
-  ];
-
-  # Make sure we never relax`$PATH` and hooks support for compatibility.
-  strictDeps = true;
-
-  # Don’t add -liconv to LDFLAGS automatically so that GHC will add it itself.
-  dontAddExtraLibs = true;
-
-  nativeBuildInputs = [
-    perl autoconf 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;
-  };
-
-} // lib.optionalAttrs targetPlatform.useAndroidPrebuilt {
-  dontStrip = true;
-  dontPatchELF = true;
-  noAuditTmpdir = true;
-})
+  sha256 = "06775a52b4d13ac09edc6dabc299fd11e59d8886bbcae450af367baee2684c8f";
+}

pkgs/development/compilers/ghc/9.4.8.fixme.nix

···
+# DO NOT port this expression to hadrian. It is not possible to build a GHC
+# cross compiler with 9.4.* and hadrian.
+import ./common-make-native-bignum.nix {
+  version = "9.4.8";
+  sha256 = "0bf407eb67fe3e3c24b0f4c8dea8cb63e07f63ca0f76cf2058565143507ab85e";
+}

pkgs/development/compilers/ghc/9.4.8.nix pkgs/development/compilers/ghc/common-make-native-bignum.nix

···
-# DO NOT port this expression to hadrian. It is not possible to build a GHC
-# cross compiler with 9.4.* and hadrian.
+{ version
+, sha256
+, url ? "https://downloads.haskell.org/ghc/${version}/ghc-${version}-src.tar.xz"
+}:
+
 { lib, stdenv, pkgsBuildTarget, pkgsHostTarget, targetPackages
 
 # build-tools
···
 , useLLVM ? !(stdenv.targetPlatform.isx86
               || stdenv.targetPlatform.isPower
               || stdenv.targetPlatform.isSparc
-              || stdenv.targetPlatform.isAarch64)
+              || (lib.versionAtLeast version "9.2" && stdenv.targetPlatform.isAarch64))
 , # LLVM is conceptually a run-time-only dependency, but for
   # non-x86, we need LLVM to bootstrap later stages, so it becomes a
   # build-time dependency too.
···
 assert stdenv.targetPlatform.isDarwin -> buildTargetLlvmPackages.clang == llvmPackages.clang;
 
 stdenv.mkDerivation (rec {
-  version = "9.4.8";
   pname = "${targetPrefix}ghc${variantSuffix}";
+  inherit version;
 
   src = fetchurl {
-    url = "https://downloads.haskell.org/ghc/${version}/ghc-${version}-src.tar.xz";
-    sha256 = "0bf407eb67fe3e3c24b0f4c8dea8cb63e07f63ca0f76cf2058565143507ab85e";
+    inherit url sha256;
   };
 
   enableParallelBuilding = true;
 
   outputs = [ "out" "doc" ];
 
-  patches = [
+  # FIXME(@sternenseemann): This can be simplified a lot (causing a rebuild)
+  patches = (if lib.versions.majorMinor version == "9.0" then [
+    # Fix docs build with sphinx >= 6.0
+    # https://gitlab.haskell.org/ghc/ghc/-/issues/22766
+    (fetchpatch {
+      name = "ghc-docs-sphinx-6.0.patch";
+      url = "https://gitlab.haskell.org/ghc/ghc/-/commit/10e94a556b4f90769b7fd718b9790d58ae566600.patch";
+      sha256 = "0kmhfamr16w8gch0lgln2912r8aryjky1hfcda3jkcwa5cdzgjdv";
+    })
+    # Fix docs build with Sphinx >= 7 https://gitlab.haskell.org/ghc/ghc/-/issues/24129
+    ./docs-sphinx-7.patch
+    # fix hyperlinked haddock sources: https://github.com/haskell/haddock/pull/1482
+    (fetchpatch {
+      url = "https://patch-diff.githubusercontent.com/raw/haskell/haddock/pull/1482.patch";
+      sha256 = "sha256-8w8QUCsODaTvknCDGgTfFNZa8ZmvIKaKS+2ZJZ9foYk=";
+      extraPrefix = "utils/haddock/";
+      stripLen = 1;
+    })
+
+    # Add flag that fixes C++ exception handling; opt-in. Merged in 9.4 and 9.2.2.
+    # https://gitlab.haskell.org/ghc/ghc/-/merge_requests/7423
+    (fetchpatch {
+      name = "ghc-9.0.2-fcompact-unwind.patch";
+      # Note that the test suite is not packaged.
+      url = "https://gitlab.haskell.org/ghc/ghc/-/commit/c6132c782d974a7701e7f6447bdcd2bf6db4299a.patch?merge_request_iid=7423";
+      sha256 = "sha256-b4feGZIaKDj/UKjWTNY6/jH4s2iate0wAgMxG3rAbZI=";
+    })
+  ] else if lib.versions.majorMinor version == "9.2" then [
+    # Fix docs build with sphinx >= 6.0
+    # https://gitlab.haskell.org/ghc/ghc/-/issues/22766
+    (fetchpatch {
+      name = "ghc-docs-sphinx-6.0.patch";
+      url = "https://gitlab.haskell.org/ghc/ghc/-/commit/10e94a556b4f90769b7fd718b9790d58ae566600.patch";
+      sha256 = "0kmhfamr16w8gch0lgln2912r8aryjky1hfcda3jkcwa5cdzgjdv";
+    })
+    # Fix docs build with Sphinx >= 7 https://gitlab.haskell.org/ghc/ghc/-/issues/24129
+    ./docs-sphinx-7.patch
+    # fix hyperlinked haddock sources: https://github.com/haskell/haddock/pull/1482
+    (fetchpatch {
+      url = "https://patch-diff.githubusercontent.com/raw/haskell/haddock/pull/1482.patch";
+      sha256 = "sha256-8w8QUCsODaTvknCDGgTfFNZa8ZmvIKaKS+2ZJZ9foYk=";
+      extraPrefix = "utils/haddock/";
+      stripLen = 1;
+    })
     # Don't generate code that doesn't compile when --enable-relocatable is passed to Setup.hs
     # Can be removed if the Cabal library included with ghc backports the linked fix
     (fetchpatch {
···
       extraPrefix = "libraries/Cabal/";
       sha256 = "sha256-yRQ6YmMiwBwiYseC5BsrEtDgFbWvst+maGgDtdD0vAY=";
     })
+  ] else if lib.versions.majorMinor version == "9.4" then [
+    # Don't generate code that doesn't compile when --enable-relocatable is passed to Setup.hs
+    # Can be removed if the Cabal library included with ghc backports the linked fix
+    (fetchpatch {
+      url = "https://github.com/haskell/cabal/commit/6c796218c92f93c95e94d5ec2d077f6956f68e98.patch";
+      stripLen = 1;
+      extraPrefix = "libraries/Cabal/";
+      sha256 = "sha256-yRQ6YmMiwBwiYseC5BsrEtDgFbWvst+maGgDtdD0vAY=";
+    })
+  ]
+  ++ lib.optionals (version == "9.4.5") [
+    # Fix docs build with sphinx >= 6.0
+    # https://gitlab.haskell.org/ghc/ghc/-/issues/22766
+    (fetchpatch {
+      name = "ghc-docs-sphinx-6.0.patch";
+      url = "https://gitlab.haskell.org/ghc/ghc/-/commit/10e94a556b4f90769b7fd718b9790d58ae566600.patch";
+      sha256 = "0kmhfamr16w8gch0lgln2912r8aryjky1hfcda3jkcwa5cdzgjdv";
+    })
+  ]
+  ++ [
 
     # Fix docs build with Sphinx >= 7 https://gitlab.haskell.org/ghc/ghc/-/issues/24129
     ./docs-sphinx-7.patch
-  ] ++ lib.optionals (stdenv.targetPlatform.isDarwin && stdenv.targetPlatform.isAarch64) [
+  ]
+  ++ lib.optionals (version == "9.4.6") [
+    # Work around a type not being defined when including Rts.h in bytestring's cbits
+    # due to missing feature macros. See https://gitlab.haskell.org/ghc/ghc/-/issues/23810.
+    ./9.4.6-bytestring-posix-source.patch
+  ] else [ ])
+  ++ lib.optionals (stdenv.targetPlatform.isDarwin && stdenv.targetPlatform.isAarch64) [
     # Prevent the paths module from emitting symbols that we don't use
     # when building with separate outputs.
     #
     # These cause problems as they're not eliminated by GHC's dead code
     # elimination on aarch64-darwin. (see
     # https://github.com/NixOS/nixpkgs/issues/140774 for details).
-    ./Cabal-at-least-3.6-paths-fix-cycle-aarch64-darwin.patch
+    (if lib.versionAtLeast version "9.2"
+     then ./Cabal-at-least-3.6-paths-fix-cycle-aarch64-darwin.patch
+     else ./Cabal-3.2-3.4-paths-fix-cycle-aarch64-darwin.patch)
   ];
 
   postPatch = "patchShebangs .";
···
   '' + 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"
-  '' + ''
+  ''
+  + lib.optionalString (version == "9.0.2" || lib.versionAtLeast version "9.4") ''
 
+  '' + ''
     echo -n "${buildMK}" > mk/build.mk
+  '' + lib.optionalString (lib.versionAtLeast version "9.4") ''
 
+  ''
+  + lib.optionalString (lib.versionOlder version "9.2" || lib.versionAtLeast version "9.4") ''
     sed -i -e 's|-isysroot /Developer/SDKs/MacOSX10.5.sdk||' configure
   '' + lib.optionalString (stdenv.isLinux && hostPlatform.libc == "glibc") ''
     export LOCALE_ARCHIVE="${glibcLocales}/lib/locale/locale-archive"
···
     export NIX_LDFLAGS+=" -rpath $out/lib/ghc-${version}"
   '' + lib.optionalString stdenv.isDarwin ''
     export NIX_LDFLAGS+=" -no_dtrace_dof"
+  '' + lib.optionalString (stdenv.isDarwin && lib.versionAtLeast version "9.2") ''
 
     # 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
···
   ''
   # HACK: allow bootstrapping with GHC 8.10 which works fine, as we don't have
   # binary 9.0 packaged. Bootstrapping with 9.2 is broken without hadrian.
-  + ''
+  + lib.optionalString (lib.versions.majorMinor version == "9.4") ''
     substituteInPlace configure --replace \
       'MinBootGhcVersion="9.0"' \
       'MinBootGhcVersion="8.10"'
···
     autoSignDarwinBinariesHook
   ] ++ lib.optionals enableDocs [
     sphinx
+  ] ++ lib.optionals (stdenv.isDarwin && lib.versions.majorMinor version == "9.0") [
+    # TODO(@sternenseemann): backport addition of XATTR env var like
+    # https://gitlab.haskell.org/ghc/ghc/-/merge_requests/6447
+    xattr
   ];
 
   # For building runtime libs

pkgs/top-level/haskell-packages.nix

···
       buildTargetLlvmPackages = pkgsBuildTarget.llvmPackages_12;
       llvmPackages = pkgs.llvmPackages_12;
     };
-    ghc948 = callPackage ../development/compilers/ghc/9.4.8.nix {
+    ghc948 = callPackage ../development/compilers/ghc/9.4.8.fixme.nix {
       bootPkgs =
         # Building with 9.2 is broken due to
         # https://gitlab.haskell.org/ghc/ghc/-/issues/21914