6 then "https://gitlab.haskell.org/ghc/ghc.git"
7 else "https://downloads.haskell.org/ghc/${version}/ghc-${version}-src.tar.xz"
32 , autoSignDarwinBinariesHook
36 , libiconv ? null, ncurses
39 , # GHC can be built with system libffi or a bundled one.
42 , useLLVM ? !(stdenv.targetPlatform.isx86
43 || stdenv.targetPlatform.isPower
44 || stdenv.targetPlatform.isSparc
45 || stdenv.targetPlatform.isAarch64
46 || stdenv.targetPlatform.isGhcjs)
47 , # LLVM is conceptually a run-time-only dependency, but for
48 # non-x86, we need LLVM to bootstrap later stages, so it becomes a
49 # build-time dependency too.
50 buildTargetLlvmPackages
53 , # If enabled, GHC will be built with the GPL-free but slightly slower native
54 # bignum backend instead of the faster but GPLed gmp backend.
55 enableNativeBignum ? !(lib.meta.availableOn stdenv.hostPlatform gmp
56 && lib.meta.availableOn stdenv.targetPlatform gmp)
57 || stdenv.targetPlatform.isGhcjs
60 , # If enabled, use -fPIC when compiling static libs.
61 enableRelocatedStaticLibs ? stdenv.targetPlatform != stdenv.hostPlatform
63 # Exceeds Hydra output limit (at the time of writing ~3GB) when cross compiled to riscv64.
64 # A riscv64 cross-compiler fits into the limit comfortably.
65 , enableProfiledLibs ? !stdenv.hostPlatform.isRiscV64
67 , # Whether to build dynamic libs for the standard library (on the target
68 # platform). Static libs are always built.
69 enableShared ? with stdenv.targetPlatform; !isWindows && !useiOSPrebuilt && !isStatic && !isGhcjs
71 , # Whether to build terminfo.
72 # FIXME(@sternenseemann): This actually doesn't influence what hadrian does,
73 # just what buildInputs etc. looks like. It would be best if we could actually
74 # tell it what to do like it was possible with make.
75 enableTerminfo ? !(stdenv.targetPlatform.isWindows
76 || stdenv.targetPlatform.isGhcjs
77 # terminfo can't be built for cross
78 || (stdenv.buildPlatform != stdenv.hostPlatform)
79 || (stdenv.hostPlatform != stdenv.targetPlatform))
81 , # Libdw.c only supports x86_64, i686 and s390x as of 2022-08-04
82 enableDwarf ? (stdenv.targetPlatform.isx86 ||
83 (stdenv.targetPlatform.isS390 && stdenv.targetPlatform.is64bit)) &&
84 lib.meta.availableOn stdenv.hostPlatform elfutils &&
85 lib.meta.availableOn stdenv.targetPlatform elfutils &&
86 # HACK: elfutils is marked as broken on static platforms
87 # which availableOn can't tell.
88 !stdenv.targetPlatform.isStatic &&
89 !stdenv.hostPlatform.isStatic
92 , # What flavour to build. Flavour string may contain a flavour and flavour
93 # transformers as accepted by hadrian.
96 # TODO(@sternenseemann): does using the static flavour make sense?
97 baseFlavour = "release";
98 # Note: in case hadrian's flavour transformers cease being expressive
99 # enough for us, we'll need to resort to defining a "nixpkgs" flavour
100 # in hadrianUserSettings and using that instead.
102 lib.optionals useLLVM [ "llvm" ]
103 ++ lib.optionals (!enableShared) [
107 ++ lib.optionals (!enableProfiledLibs) [ "no_profiled_libs" ]
108 # While split sections are now enabled by default in ghc 8.8 for windows,
109 # they seem to lead to `too many sections` errors when building base for
111 ++ lib.optionals (!stdenv.targetPlatform.isWindows) [ "split_sections" ]
114 baseFlavour + lib.concatMapStrings (t: "+${t}") transformers
116 , # Contents of the UserSettings.hs file to use when compiling hadrian.
117 hadrianUserSettings ? ''
118 module UserSettings (
119 userFlavours, userPackages, userDefaultFlavour,
120 verboseCommand, buildProgressColour, successColour, finalStage
125 import {-# SOURCE #-} Settings.Default
127 -- no way to set this via the command line
130 # Always build the stage 2 compiler if possible.
131 # TODO(@sternensemann): unify condition with make-built GHCs
132 if stdenv.hostPlatform.canExecute stdenv.targetPlatform
133 then "Stage2" # native compiler or “native” cross e.g. pkgsStatic
134 else "Stage1" # cross compiler
137 userDefaultFlavour :: String
138 userDefaultFlavour = "release"
140 userFlavours :: [Flavour]
144 buildProgressColour :: BuildProgressColour
145 buildProgressColour = mkBuildProgressColour (Dull Reset)
146 successColour :: SuccessColour
147 successColour = mkSuccessColour (Dull Reset)
149 -- taken from src/UserSettings.hs unchanged, need to be there
150 userPackages :: [Package]
152 verboseCommand :: Predicate
154 verbosity <- expr getVerbosity
155 return $ verbosity >= Verbose
160 name = "ghc-${version}"; # -source appended by srcOnly
162 (if rev != null then fetchgit else fetchurl) ({
164 } // lib.optionalAttrs (rev != null) {
166 } // lib.optionalAttrs (postFetch != null) {
172 # Disable haddock generating pretty source listings to stay under 3GB on aarch64-linux
173 enableHyperlinkedSource =
174 lib.versionAtLeast version "9.8" ||
175 !(stdenv.hostPlatform.isAarch64 && stdenv.hostPlatform.isLinux);
178 # Fix docs build with Sphinx >= 7 https://gitlab.haskell.org/ghc/ghc/-/issues/24129
179 (if lib.versionAtLeast version "9.8"
180 then ./docs-sphinx-7-ghc98.patch
181 else ./docs-sphinx-7.patch )
183 ++ lib.optionals (lib.versionAtLeast version "9.6" && lib.versionOlder version "9.6.6") [
185 name = "fix-fully_static.patch";
186 url = "https://gitlab.haskell.org/ghc/ghc/-/commit/1bb24432ff77e11a0340a7d8586e151e15bba2a1.diff";
187 hash = "sha256-MpvTmFFsNiPDoOp9BhZyWeapeibQ77zgEV+xzZ1UAXs=";
190 ++ lib.optionals (lib.versionAtLeast version "9.6" && lib.versionOlder version "9.8") [
191 # Fix unlit being installed under a different name than is used in the
192 # settings file: https://gitlab.haskell.org/ghc/ghc/-/issues/23317
194 name = "ghc-9.6-fix-unlit-path.patch";
195 url = "https://gitlab.haskell.org/ghc/ghc/-/commit/8fde4ac84ec7b1ead238cb158bbef48555d12af9.patch";
196 hash = "sha256-3+CyRBpebEZi8YpS22SsdGQHqi0drR7cCKPtKbR3zyE=";
199 ++ lib.optionals (stdenv.targetPlatform.isDarwin && stdenv.targetPlatform.isAarch64) [
200 # Prevent the paths module from emitting symbols that we don't use
201 # when building with separate outputs.
203 # These cause problems as they're not eliminated by GHC's dead code
204 # elimination on aarch64-darwin. (see
205 # https://github.com/NixOS/nixpkgs/issues/140774 for details).
206 (if lib.versionOlder version "9.10"
207 then ./Cabal-at-least-3.6-paths-fix-cycle-aarch64-darwin.patch
208 else ./Cabal-3.12-paths-fix-cycle-aarch64-darwin.patch)
210 # Prevents passing --hyperlinked-source to haddock. This is a custom
211 # workaround as we wait for this to be configurable via userSettings or
212 # similar. https://gitlab.haskell.org/ghc/ghc/-/issues/23625
213 ++ lib.optionals (!enableHyperlinkedSource) [
214 # TODO(@sternenseemann): Doesn't apply for GHC >= 9.8
215 ../../tools/haskell/hadrian/disable-hyperlinked-source.patch
217 # Incorrect bounds on Cabal in hadrian
218 # https://gitlab.haskell.org/ghc/ghc/-/issues/24100
219 ++ lib.optionals (lib.elem version [ "9.8.1" "9.8.2" ]) [
220 ../../tools/haskell/hadrian/hadrian-9.8.1-allow-Cabal-3.10.patch
226 # GHC's build system hadrian built from the GHC-to-build's source tree
227 # using our bootstrap GHC.
228 , hadrian ? import ../../tools/haskell/hadrian/make-hadrian.nix { inherit bootPkgs lib; } {
230 ghcVersion = version;
231 userSettings = hadrianUserSettings;
234 , # Whether to build sphinx documentation.
235 # TODO(@sternenseemann): Hadrian ignores the --docs flag if finalStage = Stage1
237 # Docs disabled if we are building on musl because it's a large task to keep
238 # all `sphinx` dependencies building in this environment.
239 !stdenv.buildPlatform.isMusl
242 , # Whether to disable the large address space allocator
243 # necessary fix for iOS: https://www.reddit.com/r/haskell/comments/4ttdz1/building_an_osxi386_to_iosarm64_cross_compiler/d5qvd67/
244 disableLargeAddressSpace ? stdenv.targetPlatform.isiOS
246 , # Whether to build an unregisterised version of GHC.
247 # GHC will normally auto-detect whether it can do a registered build, but this
248 # option will force it to do an unregistered build when set to true.
249 # See https://gitlab.haskell.org/ghc/ghc/-/wikis/building/unregisterised
250 enableUnregisterised ? false
253 assert !enableNativeBignum -> gmp != null;
255 # GHC does not support building when all 3 platforms are different.
256 assert stdenv.buildPlatform == stdenv.hostPlatform || stdenv.hostPlatform == stdenv.targetPlatform;
258 # It is currently impossible to cross-compile GHC with Hadrian.
259 assert stdenv.buildPlatform == stdenv.hostPlatform;
262 inherit (stdenv) buildPlatform hostPlatform targetPlatform;
264 # TODO(@Ericson2314) Make unconditional
265 targetPrefix = lib.optionalString
266 (targetPlatform != hostPlatform)
267 "${targetPlatform.config}-";
270 # -fexternal-dynamic-refs apparently (because it's not clear from the
271 # documentation) makes the GHC RTS able to load static libraries, which may
272 # be needed for TemplateHaskell. This solution was described in
273 # https://www.tweag.io/blog/2020-09-30-bazel-static-haskell
274 lib.optionals enableRelocatedStaticLibs [
275 "*.*.ghc.*.opts += -fPIC -fexternal-dynamic-refs"
277 ++ lib.optionals targetPlatform.useAndroidPrebuilt [
278 "*.*.ghc.c.opts += -optc-std=gnu99"
281 # Splicer will pull out correct variations
282 libDeps = platform: lib.optional enableTerminfo ncurses
283 ++ lib.optionals (!targetPlatform.isGhcjs) [libffi]
284 # Bindist configure script fails w/o elfutils in linker search path
285 # https://gitlab.haskell.org/ghc/ghc/-/issues/22081
286 ++ lib.optional enableDwarf elfutils
287 ++ lib.optional (!enableNativeBignum) gmp
288 ++ lib.optional (platform.libc != "glibc" && !targetPlatform.isWindows && !targetPlatform.isGhcjs) libiconv;
290 # TODO(@sternenseemann): is buildTarget LLVM unnecessary?
291 # GHC doesn't seem to have {LLC,OPT}_HOST
293 (if targetPlatform.isGhcjs
294 then pkgsBuildTarget.emscripten
295 else pkgsBuildTarget.targetPackages.stdenv.cc)
296 ] ++ lib.optional useLLVM buildTargetLlvmPackages.llvm;
298 buildCC = buildPackages.stdenv.cc;
299 targetCC = builtins.head toolsForTarget;
301 if targetPlatform.isGhcjs
302 then pkgsHostTarget.emscripten
303 else pkgsHostTarget.targetPackages.stdenv.cc;
305 # toolPath calculates the absolute path to the name tool associated with a
306 # given `stdenv.cc` derivation, i.e. it picks the correct derivation to take
307 # the tool from (cc, cc.bintools, cc.bintools.bintools) and adds the correct
308 # subpath of the tool.
317 ranlib = cc.bintools;
319 readelf = cc.bintools;
320 objdump = cc.bintools;
323 "ld.gold" = cc.bintools;
325 otool = cc.bintools.bintools;
327 # GHC needs install_name_tool on all darwin platforms. The same one can
328 # be used on both platforms. It is safe to use with linker-generated
329 # signatures because it will update the signatures automatically after
330 # modifying the target binary.
331 install_name_tool = cc.bintools.bintools;
333 # strip on darwin is wrapped to enable deterministic mode.
335 # TODO(@sternenseemann): also use wrapper if linker == "bfd" or "gold"
336 if stdenv.targetPlatform.isDarwin
338 else cc.bintools.bintools;
340 # clang is used as an assembler on darwin with the LLVM backend
344 "${tools}/bin/${tools.targetPrefix}${name}";
346 # Use gold either following the default, or to avoid the BFD linker due to some bugs / perf issues.
347 # But we cannot avoid BFD when using musl libc due to https://sourceware.org/bugzilla/show_bug.cgi?id=23856
348 # see #84670 and #49071 for more background.
349 useLdGold = targetPlatform.linker == "gold" ||
350 (targetPlatform.linker == "bfd" && (targetCC.bintools.bintools.hasGold or false) && !targetPlatform.isMusl);
352 # Makes debugging easier to see which variant is at play in `nix-store -q --tree`.
353 variantSuffix = lib.concatStrings [
354 (lib.optionalString stdenv.hostPlatform.isMusl "-musl")
355 (lib.optionalString enableNativeBignum "-native-bignum")
358 # These libraries are library dependencies of the standard libraries bundled
359 # by GHC (core libs) users will link their compiled artifacts again. Thus,
360 # they should be taken from targetPackages.
362 # We need to use pkgsHostTarget if we are cross compiling a native GHC compiler,
363 # though (when native compiling GHC, pkgsHostTarget == targetPackages):
365 # 1. targetPackages would be empty(-ish) in this situation since we can't
366 # execute cross compiled compilers in order to obtain the libraries
367 # that would be in targetPackages.
368 # 2. pkgsHostTarget is fine to use since hostPlatform == targetPlatform in this
370 # 3. The core libs used by the final GHC (stage 2) for user artifacts are also
371 # used to build stage 2 GHC itself, i.e. the core libs are both host and
375 (if hostPlatform != targetPlatform then targetPackages else pkgsHostTarget)
382 # Our Cabal compiler name
383 haskellCompilerName = "ghc-${version}";
387 stdenv.mkDerivation ({
388 pname = "${targetPrefix}ghc${variantSuffix}";
393 enableParallelBuilding = true;
396 patchShebangs --build .
399 # GHC needs the locale configured during the Haddock phase.
400 LANG = "en_US.UTF-8";
402 # GHC is a bit confused on its cross terminology.
403 # TODO(@sternenseemann): investigate coreutils dependencies and pass absolute paths
405 for env in $(env | grep '^TARGET_' | sed -E 's|\+?=.*||'); do
406 export "''${env#TARGET_}=''${!env}"
408 # No need for absolute paths since these tools only need to work during the build
409 export CC_STAGE0="$CC_FOR_BUILD"
410 export LD_STAGE0="$LD_FOR_BUILD"
411 export AR_STAGE0="$AR_FOR_BUILD"
413 # Stage0 (build->build) which builds stage 1
414 export GHC="${bootPkgs.ghc}/bin/ghc"
415 # GHC is a bit confused on its cross terminology, as these would normally be
417 export CC="${toolPath "cc" targetCC}"
418 export CXX="${toolPath "c++" targetCC}"
419 # Use gold to work around https://sourceware.org/bugzilla/show_bug.cgi?id=16177
420 export LD="${toolPath "ld${lib.optionalString useLdGold ".gold"}" targetCC}"
421 export AS="${toolPath "as" targetCC}"
422 export AR="${toolPath "ar" targetCC}"
423 export NM="${toolPath "nm" targetCC}"
424 export RANLIB="${toolPath "ranlib" targetCC}"
425 export READELF="${toolPath "readelf" targetCC}"
426 export STRIP="${toolPath "strip" targetCC}"
427 export OBJDUMP="${toolPath "objdump" targetCC}"
428 '' + lib.optionalString (stdenv.targetPlatform.linker == "cctools") ''
429 export OTOOL="${toolPath "otool" targetCC}"
430 export INSTALL_NAME_TOOL="${toolPath "install_name_tool" targetCC}"
431 '' + lib.optionalString useLLVM ''
432 export LLC="${lib.getBin buildTargetLlvmPackages.llvm}/bin/llc"
433 export OPT="${lib.getBin buildTargetLlvmPackages.llvm}/bin/opt"
434 '' + lib.optionalString (useLLVM && stdenv.targetPlatform.isDarwin) ''
435 # LLVM backend on Darwin needs clang: https://downloads.haskell.org/~ghc/latest/docs/html/users_guide/codegens.html#llvm-code-generator-fllvm
436 # The executable we specify via $CLANG is used as an assembler (exclusively, it seems, but this isn't
437 # clarified in any user facing documentation). As such, it'll be called on assembly produced by $CC
438 # which usually comes from the darwin stdenv. To prevent a situation where $CLANG doesn't understand
439 # the assembly it is given, we need to make sure that it matches the LLVM version of $CC if possible.
440 # It is unclear (at the time of writing 2024-09-01) whether $CC should match the LLVM version we use
441 # for llc and opt which would require using a custom darwin stdenv for targetCC.
444 then toolPath "clang" targetCC
445 else "${buildTargetLlvmPackages.clang}/bin/${buildTargetLlvmPackages.clang.targetPrefix}clang"
448 lib.optionalString (stdenv.hostPlatform.isLinux && hostPlatform.libc == "glibc") ''
449 export LOCALE_ARCHIVE="${glibcLocales}/lib/locale/locale-archive"
450 '' + lib.optionalString (!stdenv.hostPlatform.isDarwin) ''
451 export NIX_LDFLAGS+=" -rpath $out/lib/ghc-${version}"
452 '' + lib.optionalString stdenv.hostPlatform.isDarwin ''
453 export NIX_LDFLAGS+=" -no_dtrace_dof"
455 # GHC tries the host xattr /usr/bin/xattr by default which fails since it expects python to be 2.7
456 export XATTR=${lib.getBin xattr}/bin/xattr
458 # If we are not using release tarballs, some files need to be generated using
460 + lib.optionalString (rev != null) ''
461 echo ${version} > VERSION
462 echo ${rev} > GIT_COMMIT_ID
465 + lib.optionalString targetPlatform.useAndroidPrebuilt ''
466 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
467 '' + lib.optionalString targetPlatform.isMusl ''
468 echo "patching llvm-targets for musl targets..."
469 echo "Cloning these existing '*-linux-gnu*' targets:"
470 grep linux-gnu llvm-targets | sed 's/^/ /'
471 echo "(go go gadget sed)"
472 sed -i 's,\(^.*linux-\)gnu\(.*\)$,\0\n\1musl\2,' llvm-targets
473 echo "llvm-targets now contains these '*-linux-musl*' targets:"
474 grep linux-musl llvm-targets | sed 's/^/ /'
476 echo "And now patching to preserve '-musleabi' as done with '-gnueabi'"
477 # (aclocal.m4 is actual source, but patch configure as well since we don't re-gen)
478 for x in configure aclocal.m4; do
479 substituteInPlace $x \
480 --replace '*-android*|*-gnueabi*)' \
481 '*-android*|*-gnueabi*|*-musleabi*)'
484 # Need to make writable EM_CACHE for emscripten. The path in EM_CACHE must be absolute.
485 # https://gitlab.haskell.org/ghc/ghc/-/wikis/javascript-backend#configure-fails-with-sub-word-sized-atomic-operations-not-available
486 + lib.optionalString targetPlatform.isGhcjs ''
487 export EM_CACHE="$(realpath $(mktemp -d emcache.XXXXXXXXXX))"
488 cp -Lr ${targetCC /* == emscripten */}/share/emscripten/cache/* "$EM_CACHE/"
489 chmod u+rwX -R "$EM_CACHE"
491 # Create bash array hadrianFlagsArray for use in buildPhase. Do it in
492 # preConfigure, so overrideAttrs can be used to modify it effectively.
493 # hadrianSettings are passed via the command line so they are more visible
498 ${lib.escapeShellArgs hadrianSettings}
502 ${if targetPlatform.isGhcjs then "configureScript" else null} = "emconfigure ./configure";
503 # GHC currently ships an edited config.sub so ghcjs is accepted which we can not rollback
504 ${if targetPlatform.isGhcjs then "dontUpdateAutotoolsGnuConfigScripts" else null} = true;
506 # TODO(@Ericson2314): Always pass "--target" and always prefix.
507 configurePlatforms = [ "build" "host" ]
508 ++ lib.optional (targetPlatform != hostPlatform) "target";
510 # `--with` flags for libraries needed for RTS linker
512 "--datadir=$doc/share/doc/ghc"
513 ] ++ lib.optionals enableTerminfo [
514 "--with-curses-includes=${lib.getDev targetLibs.ncurses}/include"
515 "--with-curses-libraries=${lib.getLib targetLibs.ncurses}/lib"
516 ] ++ lib.optionals (libffi != null && !targetPlatform.isGhcjs) [
517 "--with-system-libffi"
518 "--with-ffi-includes=${targetLibs.libffi.dev}/include"
519 "--with-ffi-libraries=${targetLibs.libffi.out}/lib"
520 ] ++ lib.optionals (targetPlatform == hostPlatform && !enableNativeBignum) [
521 "--with-gmp-includes=${targetLibs.gmp.dev}/include"
522 "--with-gmp-libraries=${targetLibs.gmp.out}/lib"
523 ] ++ lib.optionals (targetPlatform == hostPlatform && hostPlatform.libc != "glibc" && !targetPlatform.isWindows) [
524 "--with-iconv-includes=${libiconv}/include"
525 "--with-iconv-libraries=${libiconv}/lib"
526 ] ++ lib.optionals (targetPlatform != hostPlatform) [
527 "--enable-bootstrap-with-devel-snapshot"
528 ] ++ lib.optionals useLdGold [
529 "CFLAGS=-fuse-ld=gold"
530 "CONF_GCC_LINKER_OPTS_STAGE1=-fuse-ld=gold"
531 "CONF_GCC_LINKER_OPTS_STAGE2=-fuse-ld=gold"
532 ] ++ lib.optionals (disableLargeAddressSpace) [
533 "--disable-large-address-space"
534 ] ++ lib.optionals enableDwarf [
535 "--enable-dwarf-unwind"
536 "--with-libdw-includes=${lib.getDev targetLibs.elfutils}/include"
537 "--with-libdw-libraries=${lib.getLib targetLibs.elfutils}/lib"
538 ] ++ lib.optionals targetPlatform.isDarwin [
539 # Darwin uses llvm-ar. GHC will try to use `-L` with `ar` when it is `llvm-ar`
540 # but it doesn’t currently work because Cabal never uses `-L` on Darwin. See:
541 # https://gitlab.haskell.org/ghc/ghc/-/issues/23188
542 # https://github.com/haskell/cabal/issues/8882
543 "fp_cv_prog_ar_supports_dash_l=no"
544 ] ++ lib.optionals enableUnregisterised [
545 "--enable-unregisterised"
548 # Make sure we never relax`$PATH` and hooks support for compatibility.
551 # Don’t add -liconv to LDFLAGS automatically so that GHC will add it itself.
552 dontAddExtraLibs = true;
554 nativeBuildInputs = [
555 perl hadrian bootPkgs.alex bootPkgs.happy bootPkgs.hscolour
556 # autoconf and friends are necessary for hadrian to create the bindist
558 # Python is used in a few scripts invoked by hadrian to generate e.g. rts headers.
560 # Tool used to update GHC's settings file in postInstall
561 bootPkgs.ghc-settings-edit
562 ] ++ lib.optionals (stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isAarch64) [
563 autoSignDarwinBinariesHook
564 ] ++ lib.optionals enableDocs [
568 # For building runtime libs
569 depsBuildTarget = toolsForTarget;
570 # Everything the stage0 compiler needs to build stage1: CC, bintools, extra libs.
571 # See also GHC, {CC,LD,AR}_STAGE0 in preConfigure.
573 # N.B. We do not declare bootPkgs.ghc in any of the stdenv.mkDerivation
574 # dependency lists to prevent the bintools setup hook from adding ghc's
575 # lib directory to the linker flags. Instead we tell configure about it
576 # via the GHC environment variable.
578 # stage0 builds terminfo unconditionally, so we always need ncurses
582 # Prevent stage0 ghc from leaking into the final result. This was an issue
584 disallowedReferences = [
588 buildInputs = [ bash ] ++ (libDeps hostPlatform);
590 depsTargetTarget = map lib.getDev (libDeps targetPlatform);
591 depsTargetTargetPropagated = map (lib.getOutput "out") (libDeps targetPlatform);
594 "--flavour=${ghcFlavour}"
595 "--bignum=${if enableNativeBignum then "native" else "gmp"}"
596 "--docs=${if enableDocs then "no-sphinx-pdfs" else "no-sphinx"}"
602 # hadrianFlagsArray is created in preConfigure
603 echo "hadrianFlags: $hadrianFlags ''${hadrianFlagsArray[@]}"
605 # We need to go via the bindist for installing
606 hadrian $hadrianFlags "''${hadrianFlagsArray[@]}" binary-dist-dir
611 # required, because otherwise all symbols from HSffi.o are stripped, and
612 # that in turn causes GHCi to abort
613 stripDebugFlags = [ "-S" ] ++ lib.optional (!targetPlatform.isDarwin) "--keep-file-symbols";
615 checkTarget = "test";
619 # In nixpkgs, musl based builds currently enable `pie` hardening by default
620 # (see `defaultHardeningFlags` in `make-derivation.nix`).
621 # But GHC cannot currently produce outputs that are ready for `-pie` linking.
622 # Thus, disable `pie` hardening, otherwise `recompile with -fPIE` errors appear.
624 # * https://github.com/NixOS/nixpkgs/issues/129247
625 # * https://gitlab.haskell.org/ghc/ghc/-/issues/19580
626 ++ lib.optional stdenv.targetPlatform.isMusl "pie";
628 # big-parallel allows us to build with more than 2 cores on
629 # Hydra which already warrants a significant speedup
630 requiredSystemFeatures = [ "big-parallel" ];
632 outputs = [ "out" "doc" ];
634 # We need to configure the bindist *again* before installing
635 # https://gitlab.haskell.org/ghc/ghc/-/issues/22058
636 # TODO(@sternenseemann): it would be nice if the bindist could be an intermediate
637 # derivation, but since it is > 2GB even on x86_64-linux, not a good idea?
639 pushd _build/bindist/*
642 # the bindist configure script uses different env variables than the GHC configure script
643 # see https://github.com/NixOS/nixpkgs/issues/267250 and https://gitlab.haskell.org/ghc/ghc/-/issues/24211
644 + lib.optionalString (stdenv.targetPlatform.linker == "cctools") ''
645 export InstallNameToolCmd=$INSTALL_NAME_TOOL
646 export OtoolCmd=$OTOOL
649 $configureScript $configureFlags "''${configureFlagsArray[@]}"
653 # leave bindist directory
656 settingsFile="$out/lib/${targetPrefix}${haskellCompilerName}/lib/settings"
658 # Make the installed GHC use the host->target tools.
659 ghc-settings-edit "$settingsFile" \
660 "C compiler command" "${toolPath "cc" installCC}" \
661 "Haskell CPP command" "${toolPath "cc" installCC}" \
662 "C++ compiler command" "${toolPath "c++" installCC}" \
663 "ld command" "${toolPath "ld${lib.optionalString useLdGold ".gold"}" installCC}" \
664 "Merge objects command" "${toolPath "ld${lib.optionalString useLdGold ".gold"}" installCC}" \
665 "ar command" "${toolPath "ar" installCC}" \
666 "ranlib command" "${toolPath "ranlib" installCC}"
668 + lib.optionalString (stdenv.targetPlatform.linker == "cctools") ''
669 ghc-settings-edit "$settingsFile" \
670 "otool command" "${toolPath "otool" installCC}" \
671 "install_name_tool command" "${toolPath "install_name_tool" installCC}"
673 + lib.optionalString useLLVM ''
674 ghc-settings-edit "$settingsFile" \
675 "LLVM llc command" "${lib.getBin llvmPackages.llvm}/bin/llc" \
676 "LLVM opt command" "${lib.getBin llvmPackages.llvm}/bin/opt"
678 + lib.optionalString (useLLVM && stdenv.targetPlatform.isDarwin) ''
679 ghc-settings-edit "$settingsFile" \
680 "LLVM clang command" "${
681 # See comment for CLANG in preConfigure
683 then toolPath "clang" installCC
684 else "${llvmPackages.clang}/bin/${llvmPackages.clang.targetPrefix}clang"
689 # Install the bash completion file.
690 install -Dm 644 utils/completion/ghc.bash $out/share/bash-completion/completions/${targetPrefix}ghc
694 inherit bootPkgs targetPrefix haskellCompilerName;
696 inherit llvmPackages;
697 inherit enableShared;
699 # Expose hadrian used for bootstrapping, for debugging purposes
702 # TODO(@sternenseemann): there's no stage0:exe:haddock target by default,
703 # so haddock isn't available for GHC cross-compilers. Can we fix that?
704 hasHaddock = stdenv.hostPlatform == stdenv.targetPlatform;
708 homepage = "http://haskell.org/ghc";
709 description = "Glasgow Haskell Compiler";
710 maintainers = with lib.maintainers; [
712 ] ++ lib.teams.haskell.members;
714 platforms = lib.platforms.all;
715 inherit (bootPkgs.ghc.meta) license;
718 dontStrip = targetPlatform.useAndroidPrebuilt || targetPlatform.isWasm;
719 } // lib.optionalAttrs targetPlatform.useAndroidPrebuilt {
721 noAuditTmpdir = true;