Merge pull request #33358 from obsidiansystems/cross-haskell-samehash

haskell infra, ghc: Start to fix cross compilation without changing hashes

pkgs/development/compilers/ghc/6.10.2-binary.nix

@@ -4,6 +4,9 @@
 , enableIntegerSimple ? false
 }:
 
+# Prebuilt only does native
+assert stdenv.targetPlatform == stdenv.hostPlatform;
+
 stdenv.mkDerivation rec {
   version = "6.10.2";
 
@@ -93,6 +96,8 @@ stdenv.mkDerivation rec {
     [ $(./main) == "yes" ]
   '';
 
+  passthru = { targetPrefix = ""; };
+
   meta = {
     homepage = http://haskell.org/ghc;
     description = "The Glasgow Haskell Compiler";

pkgs/development/compilers/ghc/6.10.4.nix

@@ -1,5 +1,8 @@
 {stdenv, fetchurl, libedit, ghc, perl, gmp, ncurses}:
 
+# TODO(@Ericson2314): Cross compilation support
+assert stdenv.targetPlatform == stdenv.hostPlatform;
+
 stdenv.mkDerivation rec {
   version = "6.10.4";
 
@@ -22,6 +25,8 @@ stdenv.mkDerivation rec {
 
   NIX_CFLAGS_COMPILE = "-fomit-frame-pointer";
 
+  passthru = { targetPrefix = ""; };
+
   meta = {
     homepage = http://haskell.org/ghc;
     description = "The Glasgow Haskell Compiler";

pkgs/development/compilers/ghc/6.12.3.nix

@@ -1,5 +1,8 @@
 {stdenv, fetchurl, ghc, perl, gmp, ncurses}:
 
+# TODO(@Ericson2314): Cross compilation support
+assert stdenv.targetPlatform == stdenv.hostPlatform;
+
 stdenv.mkDerivation rec {
   version = "6.12.3";
 
@@ -33,6 +36,8 @@ stdenv.mkDerivation rec {
   # that in turn causes GHCi to abort
   stripDebugFlags=["-S" "--keep-file-symbols"];
 
+  passthru = { targetPrefix = ""; };
+
   meta = {
     homepage = http://haskell.org/ghc;
     description = "The Glasgow Haskell Compiler";

pkgs/development/compilers/ghc/7.0.4-binary.nix

@@ -3,6 +3,9 @@
 , ncurses5, gmp, libiconv
 }:
 
+# Prebuilt only does native
+assert stdenv.targetPlatform == stdenv.hostPlatform;
+
 let
   libPath = stdenv.lib.makeLibraryPath ([
     ncurses5 gmp
@@ -131,6 +134,8 @@ stdenv.mkDerivation rec {
     [ $(./main) == "yes" ]
   '';
 
+  passthru = { targetPrefix = ""; };
+
   meta.license = stdenv.lib.licenses.bsd3;
   meta.platforms = ["x86_64-linux" "i686-linux" "x86_64-darwin"];
 }

pkgs/development/compilers/ghc/7.0.4.nix

@@ -1,5 +1,8 @@
 { stdenv, fetchurl, ghc, perl, gmp, ncurses, libiconv }:
 
+# TODO(@Ericson2314): Cross compilation support
+assert stdenv.targetPlatform == stdenv.hostPlatform;
+
 stdenv.mkDerivation rec {
   version = "7.0.4";
   name = "ghc-${version}";
@@ -42,6 +45,8 @@ stdenv.mkDerivation rec {
   # that in turn causes GHCi to abort
   stripDebugFlags=["-S" "--keep-file-symbols"];
 
+  passthru = { targetPrefix = ""; };
+
   meta = {
     homepage = http://haskell.org/ghc;
     description = "The Glasgow Haskell Compiler";

pkgs/development/compilers/ghc/7.10.3-binary.nix

@@ -4,6 +4,9 @@
 , gcc
 }:
 
+# Prebuilt only does native
+assert stdenv.targetPlatform == stdenv.hostPlatform;
+
 let
   libPath = stdenv.lib.makeLibraryPath ([
     ncurses5 gmp
@@ -148,6 +151,8 @@ stdenv.mkDerivation rec {
     [ $(./main) == "yes" ]
   '';
 
+  passthru = { targetPrefix = ""; };
+
   meta.license = stdenv.lib.licenses.bsd3;
   meta.platforms = ["x86_64-linux" "i686-linux" "x86_64-darwin" "armv7l-linux"];
 }

pkgs/development/compilers/ghc/7.10.3.nix

@@ -1,14 +1,28 @@
-{ stdenv, fetchurl, fetchpatch, bootPkgs, perl, ncurses, libiconv, targetPackages, coreutils
+{ stdenv, targetPackages
-, libxml2, libxslt, docbook_xsl, docbook_xml_dtd_45, docbook_xml_dtd_42, hscolour
+, buildPlatform, hostPlatform, targetPlatform
 
-  # If enabled GHC will be build with the GPL-free but slower integer-simple
+# build-tools
+, bootPkgs, hscolour
+, coreutils, fetchurl, fetchpatch, perl
+, docbook_xsl, docbook_xml_dtd_45, docbook_xml_dtd_42, libxml2, libxslt
+
+, libiconv ? null, ncurses
+
+, # If enabled, GHC will be built with the GPL-free but slower integer-simple
   # library instead of the faster but GPLed integer-gmp library.
-, enableIntegerSimple ? false, gmp
+  enableIntegerSimple ? false, gmp ? null
 }:
 
+assert !enableIntegerSimple -> gmp != null;
+
 let
   inherit (bootPkgs) ghc;
 
+  # TODO(@Ericson2314) Make unconditional
+  targetPrefix = stdenv.lib.optionalString
+    (targetPlatform != hostPlatform)
+    "${targetPlatform.config}-";
+
   docFixes = fetchurl {
     url = "https://downloads.haskell.org/~ghc/7.10.3/ghc-7.10.3a.patch";
     sha256 = "1j45z4kcd3w1rzm4hapap2xc16bbh942qnzzdbdjcwqznsccznf0";
@@ -18,10 +32,10 @@ in
 
 stdenv.mkDerivation rec {
   version = "7.10.3";
-  name = "ghc-${version}";
+  name = "${targetPrefix}ghc-${version}";
 
   src = fetchurl {
-    url = "https://downloads.haskell.org/~ghc/${version}/${name}-src.tar.xz";
+    url = "https://downloads.haskell.org/~ghc/${version}/ghc-${version}-src.tar.xz";
     sha256 = "1vsgmic8csczl62ciz51iv8nhrkm72lyhbz7p7id13y2w7fcx46g";
   };
 
@@ -62,7 +76,7 @@ stdenv.mkDerivation rec {
 
   postInstall = ''
     # Install the bash completion file.
-    install -D -m 444 utils/completion/ghc.bash $out/share/bash-completion/completions/ghc
+    install -D -m 444 utils/completion/ghc.bash $out/share/bash-completion/completions/${targetPrefix}ghc
 
     # Patch scripts to include "readelf" and "cat" in $PATH.
     for i in "$out/bin/"*; do
@@ -73,7 +87,7 @@ stdenv.mkDerivation rec {
   '';
 
   passthru = {
-    inherit bootPkgs;
+    inherit bootPkgs targetPrefix;
   };
 
   meta = {

pkgs/development/compilers/ghc/7.2.2.nix

@@ -1,10 +1,14 @@
 { stdenv, fetchurl, ghc, perl, ncurses, libiconv
 
-  # If enabled GHC will be build with the GPL-free but slower integer-simple
+, # If enabled, GHC will be built with the GPL-free but slower integer-simple
   # library instead of the faster but GPLed integer-gmp library.
-, enableIntegerSimple ? false, gmp
+  enableIntegerSimple ? false, gmp ? null
 }:
 
+# TODO(@Ericson2314): Cross compilation support
+assert stdenv.targetPlatform == stdenv.hostPlatform;
+assert !enableIntegerSimple -> gmp != null;
+
 stdenv.mkDerivation rec {
   version = "7.2.2";
   name = "ghc-${version}";
@@ -51,6 +55,8 @@ stdenv.mkDerivation rec {
   # that in turn causes GHCi to abort
   stripDebugFlags=["-S" "--keep-file-symbols"];
 
+  passthru = { targetPrefix = ""; };
+
   meta = {
     homepage = http://haskell.org/ghc;
     description = "The Glasgow Haskell Compiler";

pkgs/development/compilers/ghc/7.4.2-binary.nix

@@ -3,6 +3,9 @@
 , ncurses5, gmp, libiconv
 }:
 
+# Prebuilt only does native
+assert stdenv.targetPlatform == stdenv.hostPlatform;
+
 let
   libPath = stdenv.lib.makeLibraryPath ([
     ncurses5 gmp
@@ -133,6 +136,8 @@ stdenv.mkDerivation rec {
     [ $(./main) == "yes" ]
   '';
 
+  passthru = { targetPrefix = ""; };
+
   meta.license = stdenv.lib.licenses.bsd3;
   meta.platforms = ["x86_64-linux" "i686-linux" "x86_64-darwin"];
 }

pkgs/development/compilers/ghc/7.4.2.nix

@@ -1,10 +1,14 @@
 { stdenv, fetchurl, ghc, perl, ncurses, libiconv
 
-  # If enabled GHC will be build with the GPL-free but slower integer-simple
+, # If enabled, GHC will be built with the GPL-free but slower integer-simple
   # library instead of the faster but GPLed integer-gmp library.
-, enableIntegerSimple ? false, gmp
+  enableIntegerSimple ? false, gmp ? null
 }:
 
+# TODO(@Ericson2314): Cross compilation support
+assert stdenv.targetPlatform == stdenv.hostPlatform;
+assert !enableIntegerSimple -> gmp != null;
+
 stdenv.mkDerivation rec {
   version = "7.4.2";
 
@@ -52,6 +56,8 @@ stdenv.mkDerivation rec {
   # that in turn causes GHCi to abort
   stripDebugFlags = [ "-S" ] ++ stdenv.lib.optional (!stdenv.isDarwin) "--keep-file-symbols";
 
+  passthru = { targetPrefix = ""; };
+
   meta = {
     homepage = http://haskell.org/ghc;
     description = "The Glasgow Haskell Compiler";

pkgs/development/compilers/ghc/7.6.3.nix

@@ -1,10 +1,14 @@
 { stdenv, fetchurl, ghc, perl, ncurses, libiconv
 
-  # If enabled GHC will be build with the GPL-free but slower integer-simple
+, # If enabled, GHC will be built with the GPL-free but slower integer-simple
   # library instead of the faster but GPLed integer-gmp library.
-, enableIntegerSimple ? false, gmp
+  enableIntegerSimple ? false, gmp ? null
 }:
 
+# TODO(@Ericson2314): Cross compilation support
+assert stdenv.targetPlatform == stdenv.hostPlatform;
+assert !enableIntegerSimple -> gmp != null;
+
 let
   # The "-Wa,--noexecstack" options might be needed only with GNU ld (as opposed
   # to the gold linker). It prevents binaries' stacks from being marked as
@@ -78,6 +82,8 @@ in stdenv.mkDerivation rec {
   # that in turn causes GHCi to abort
   stripDebugFlags = [ "-S" ] ++ stdenv.lib.optional (!stdenv.isDarwin) "--keep-file-symbols";
 
+  passthru = { targetPrefix = ""; };
+
   meta = {
     homepage = http://haskell.org/ghc;
     description = "The Glasgow Haskell Compiler";

pkgs/development/compilers/ghc/7.8.4-binary.nix

@@ -3,6 +3,9 @@
 , ncurses5, gmp, libiconv
 }:
 
+# Prebuilt only does native
+assert stdenv.targetPlatform == stdenv.hostPlatform;
+
 let
   libPath = stdenv.lib.makeLibraryPath ([
     ncurses5 gmp
@@ -146,6 +149,8 @@ stdenv.mkDerivation rec {
     [ $(./main) == "yes" ]
   '';
 
+  passthru = { targetPrefix = ""; };
+
   meta.license = stdenv.lib.licenses.bsd3;
   meta.platforms = ["x86_64-linux" "i686-linux" "x86_64-darwin"];
 }

pkgs/development/compilers/ghc/7.8.4.nix

@@ -1,10 +1,14 @@
 { stdenv, fetchurl, ghc, perl, ncurses, libiconv
 
-  # If enabled GHC will be build with the GPL-free but slower integer-simple
+, # If enabled, GHC will be built with the GPL-free but slower integer-simple
   # library instead of the faster but GPLed integer-gmp library.
-, enableIntegerSimple ? false, gmp
+  enableIntegerSimple ? false, gmp ? null
 }:
 
+# TODO(@Ericson2314): Cross compilation support
+assert stdenv.targetPlatform == stdenv.hostPlatform;
+assert !enableIntegerSimple -> gmp != null;
+
 stdenv.mkDerivation (rec {
   version = "7.8.4";
   name = "ghc-${version}";
@@ -49,6 +53,8 @@ stdenv.mkDerivation (rec {
   # that in turn causes GHCi to abort
   stripDebugFlags = [ "-S" ] ++ stdenv.lib.optional (!stdenv.isDarwin) "--keep-file-symbols";
 
+  passthru = { targetPrefix = ""; };
+
   meta = {
     homepage = http://haskell.org/ghc;
     description = "The Glasgow Haskell Compiler";

pkgs/development/compilers/ghc/8.0.2.nix

@@ -1,21 +1,33 @@
-{ stdenv, lib, fetchurl, fetchpatch, bootPkgs, perl, ncurses, libiconv, targetPackages, coreutils
+{ stdenv, targetPackages
-, hscolour, patchutils, sphinx
+, buildPlatform, hostPlatform, targetPlatform
 
-  # If enabled GHC will be build with the GPL-free but slower integer-simple
+# build-tools
+, bootPkgs, hscolour
+, coreutils, fetchurl, fetchpatch, patchutils, perl, sphinx
+
+, libiconv ? null, ncurses
+
+, # If enabled, GHC will be built with the GPL-free but slower integer-simple
   # library instead of the faster but GPLed integer-gmp library.
-, enableIntegerSimple ? false, gmp
+  enableIntegerSimple ? false, gmp ? null
-, cross ? null
 }:
 
+assert !enableIntegerSimple -> gmp != null;
+
 let
   inherit (bootPkgs) ghc;
+
+  # TODO(@Ericson2314) Make unconditional
+  targetPrefix = stdenv.lib.optionalString
+    (targetPlatform != hostPlatform)
+    "${targetPlatform.config}-";
 in
 stdenv.mkDerivation rec {
   version = "8.0.2";
-  name = "ghc-${version}";
+  name = "${targetPrefix}ghc-${version}";
 
   src = fetchurl {
-    url = "https://downloads.haskell.org/~ghc/8.0.2/${name}-src.tar.xz";
+    url = "https://downloads.haskell.org/~ghc/8.0.2/ghc-${version}-src.tar.xz";
     sha256 = "1c8qc4fhkycynk4g1f9hvk53dj6a1vvqi6bklqznns6hw59m8qhi";
   };
 
@@ -47,19 +59,20 @@ stdenv.mkDerivation rec {
     "--with-gmp-includes=${gmp.dev}/include" "--with-gmp-libraries=${gmp.out}/lib"
   ] ++ stdenv.lib.optional stdenv.isDarwin [
     "--with-iconv-includes=${libiconv}/include" "--with-iconv-libraries=${libiconv}/lib"
-  ] ++
+  ] ++ stdenv.lib.optionals (targetPlatform.isDarwin && targetPlatform.isAarch64) [
     # fix for iOS: https://www.reddit.com/r/haskell/comments/4ttdz1/building_an_osxi386_to_iosarm64_cross_compiler/d5qvd67/
-    lib.optional (cross.config or null == "aarch64-apple-darwin14") "--disable-large-address-space";
+    "--disable-large-address-space"
+  ];
 
   # required, because otherwise all symbols from HSffi.o are stripped, and
   # that in turn causes GHCi to abort
   stripDebugFlags = [ "-S" ] ++ stdenv.lib.optional (!stdenv.isDarwin) "--keep-file-symbols";
 
   postInstall = ''
-    paxmark m $out/lib/${name}/bin/{ghc,haddock}
+    paxmark m $out/lib/${name}/bin/${if targetPlatform != hostPlatform then "ghc" else "{ghc,haddock}"}
 
     # Install the bash completion file.
-    install -D -m 444 utils/completion/ghc.bash $out/share/bash-completion/completions/ghc
+    install -D -m 444 utils/completion/ghc.bash $out/share/bash-completion/completions/${targetPrefix}ghc
 
     # Patch scripts to include "readelf" and "cat" in $PATH.
     for i in "$out/bin/"*; do
@@ -70,7 +83,7 @@ stdenv.mkDerivation rec {
   '';
 
   passthru = {
-    inherit bootPkgs;
+    inherit bootPkgs targetPrefix;
   };
 
   meta = {

pkgs/development/compilers/ghc/8.2.1-binary.nix

@@ -3,6 +3,9 @@
 , ncurses5, gmp, libiconv
 }:
 
+# Prebuilt only does native
+assert stdenv.targetPlatform == stdenv.hostPlatform;
+
 let
   libPath = stdenv.lib.makeLibraryPath ([
     ncurses5 gmp
@@ -151,6 +154,8 @@ stdenv.mkDerivation rec {
     [ $(./main) == "yes" ]
   '';
 
+  passthru = { targetPrefix = ""; };
+
   meta.license = stdenv.lib.licenses.bsd3;
   meta.platforms = ["x86_64-linux" "i686-linux" "x86_64-darwin" "armv7l-linux" "aarch64-linux"];
 }

pkgs/development/compilers/ghc/8.2.2.nix

@@ -1,27 +1,30 @@
-{ stdenv, lib, fetchurl, bootPkgs, perl, ncurses, libiconv, binutils, coreutils
+{ stdenv, targetPackages
-, autoconf, automake, happy, alex, python3, sphinx, hscolour
+, buildPlatform, hostPlatform, targetPlatform
-, buildPlatform, targetPlatform , selfPkgs, cross ? null
+, selfPkgs, cross ? null
 
-  # If enabled GHC will be build with the GPL-free but slower integer-simple
+# build-tools
+, bootPkgs, alex, happy, hscolour
+, autoconf, automake, coreutils, fetchurl, perl, python3, sphinx
+
+, libiconv ? null, ncurses
+
+, # If enabled, GHC will be built with the GPL-free but slower integer-simple
   # library instead of the faster but GPLed integer-gmp library.
-, enableIntegerSimple ? false, gmp
+  enableIntegerSimple ? false, gmp ? null
 }:
 
+assert !enableIntegerSimple -> gmp != null;
+
 let
   inherit (bootPkgs) ghc;
   version = "8.2.2";
 
-  commonBuildInputs = [ alex autoconf automake ghc happy hscolour perl python3 sphinx ];
+  # TODO(@Ericson2314) Make unconditional
-  commonPreConfigure =  ''
+  targetPrefix = stdenv.lib.optionalString
-    sed -i -e 's|-isysroot /Developer/SDKs/MacOSX10.5.sdk||' configure
+    (targetPlatform != hostPlatform)
-  '' + stdenv.lib.optionalString (!stdenv.isDarwin) ''
+    "${targetPlatform.config}-";
-    export NIX_LDFLAGS="$NIX_LDFLAGS -rpath $out/lib/ghc-${version}"
+in
-  '' + stdenv.lib.optionalString stdenv.isDarwin ''
+stdenv.mkDerivation (rec {
-    export NIX_LDFLAGS+=" -no_dtrace_dof"
-  '' + stdenv.lib.optionalString enableIntegerSimple ''
-    echo "INTEGER_LIBRARY=integer-simple" > mk/build.mk
-  '';
-in stdenv.mkDerivation (rec {
   inherit version;
   name = "ghc-${version}";
 
@@ -32,9 +35,19 @@ in stdenv.mkDerivation (rec {
 
   postPatch = "patchShebangs .";
 
-  preConfigure = commonPreConfigure;
+  preConfigure = ''
+    sed -i -e 's|-isysroot /Developer/SDKs/MacOSX10.5.sdk||' configure
+  '' + stdenv.lib.optionalString (!stdenv.isDarwin) ''
+    export NIX_LDFLAGS="$NIX_LDFLAGS -rpath $out/lib/ghc-${version}"
+  '' + stdenv.lib.optionalString stdenv.isDarwin ''
+    export NIX_LDFLAGS+=" -no_dtrace_dof"
+  '' + stdenv.lib.optionalString enableIntegerSimple ''
+    echo "INTEGER_LIBRARY=integer-simple" > mk/build.mk
+  '' + stdenv.lib.optionalString (targetPlatform != hostPlatform) ''
+    sed 's|#BuildFlavour  = quick-cross|BuildFlavour  = perf-cross|' mk/build.mk.sample > mk/build.mk
+  '';
 
-  buildInputs = commonBuildInputs;
+  buildInputs = [ alex autoconf automake ghc happy hscolour perl python3 sphinx ];
 
   enableParallelBuilding = true;
 
@@ -50,28 +63,28 @@ in stdenv.mkDerivation (rec {
 
   # required, because otherwise all symbols from HSffi.o are stripped, and
   # that in turn causes GHCi to abort
-  stripDebugFlags = [ "-S" ] ++ stdenv.lib.optional (!stdenv.isDarwin) "--keep-file-symbols";
+  stripDebugFlags = [ "-S" ] ++ stdenv.lib.optional (!targetPlatform.isDarwin) "--keep-file-symbols";
 
   checkTarget = "test";
 
   postInstall = ''
-    paxmark m $out/lib/${name}/bin/{ghc,haddock}
+    paxmark m $out/lib/${name}/bin/${if targetPlatform != hostPlatform then "ghc" else "{ghc,haddock}"}
 
     # Install the bash completion file.
-    install -D -m 444 utils/completion/ghc.bash $out/share/bash-completion/completions/ghc
+    install -D -m 444 utils/completion/ghc.bash $out/share/bash-completion/completions/${targetPrefix}ghc
 
     # Patch scripts to include "readelf" and "cat" in $PATH.
     for i in "$out/bin/"*; do
       test ! -h $i || continue
       egrep --quiet '^#!' <(head -n 1 $i) || continue
-      sed -i -e '2i export PATH="$PATH:${stdenv.lib.makeBinPath [ binutils coreutils ]}"' $i
+      sed -i -e '2i export PATH="$PATH:${stdenv.lib.makeBinPath [ targetPackages.stdenv.cc.bintools coreutils ]}"' $i
     done
   '';
 
   outputs = [ "out" "doc" ];
 
   passthru = {
-    inherit bootPkgs;
+    inherit bootPkgs targetPrefix;
   } // stdenv.lib.optionalAttrs (targetPlatform != buildPlatform) {
     crossCompiler = selfPkgs.ghc.override {
       cross = targetPlatform;
@@ -89,29 +102,23 @@ in stdenv.mkDerivation (rec {
 } // stdenv.lib.optionalAttrs (cross != null) {
   name = "${cross.config}-ghc-${version}";
 
-  preConfigure = commonPreConfigure + ''
-    sed 's|#BuildFlavour  = quick-cross|BuildFlavour  = perf-cross|' mk/build.mk.sample > mk/build.mk
-  '';
-
   configureFlags = [
-    "CC=${stdenv.ccCross}/bin/${cross.config}-cc"
+    "CC=${stdenv.cc}/bin/${cross.config}-cc"
-    "LD=${stdenv.binutils}/bin/${cross.config}-ld"
+    "LD=${stdenv.cc.bintools}/bin/${cross.config}-ld"
-    "AR=${stdenv.binutils}/bin/${cross.config}-ar"
+    "AR=${stdenv.cc.bintools}/bin/${cross.config}-ar"
-    "NM=${stdenv.binutils}/bin/${cross.config}-nm"
+    "NM=${stdenv.cc.bintools}/bin/${cross.config}-nm"
-    "RANLIB=${stdenv.binutils}/bin/${cross.config}-ranlib"
+    "RANLIB=${stdenv.cc.bintools}/bin/${cross.config}-ranlib"
     "--target=${cross.config}"
     "--enable-bootstrap-with-devel-snapshot"
   ] ++
     # fix for iOS: https://www.reddit.com/r/haskell/comments/4ttdz1/building_an_osxi386_to_iosarm64_cross_compiler/d5qvd67/
-    lib.optional (cross.config or null == "aarch64-apple-darwin14") "--disable-large-address-space";
+    stdenv.lib.optional (cross.config or null == "aarch64-apple-darwin14") "--disable-large-address-space";
 
-  buildInputs = commonBuildInputs ++ [ stdenv.ccCross stdenv.binutils ];
+  configurePlatforms = [];
-
-  dontSetConfigureCross = true;
 
   passthru = {
     inherit bootPkgs cross;
-    cc = "${stdenv.ccCross}/bin/${cross.config}-cc";
+    cc = "${stdenv.cc}/bin/${cross.config}-cc";
-    ld = "${stdenv.binutils}/bin/${cross.config}-ld";
+    ld = "${stdenv.cc}/bin/${cross.config}-ld";
   };
 })

pkgs/development/compilers/ghc/head.nix

@@ -1,33 +1,33 @@
-{ stdenv, lib, fetchgit, bootPkgs, perl, ncurses, libiconv, targetPackages, coreutils
+{ stdenv, targetPackages
-, autoconf, automake, happy, alex, python3, buildPlatform, targetPlatform
+, buildPlatform, hostPlatform, targetPlatform
 , selfPkgs, cross ? null
 
-  # If enabled GHC will be build with the GPL-free but slower integer-simple
+# build-tools
+, bootPkgs, alex, happy
+, autoconf, automake, coreutils, fetchgit, perl, python3
+
+, libiconv ? null, ncurses
+
+, # If enabled, GHC will be built with the GPL-free but slower integer-simple
   # library instead of the faster but GPLed integer-gmp library.
-, enableIntegerSimple ? false, gmp
+  enableIntegerSimple ? false, gmp ? null
+
 , version ? "8.5.20171209"
 }:
 
+assert !enableIntegerSimple -> gmp != null;
+
 let
   inherit (bootPkgs) ghc;
 
-  commonBuildInputs = [ ghc perl autoconf automake happy alex python3 ];
-
   rev = "4335c07ca7e64624819b22644d7591853826bd75";
 
-  commonPreConfigure =  ''
+  # TODO(@Ericson2314) Make unconditional
-    echo ${version} >VERSION
+  targetPrefix = stdenv.lib.optionalString
-    echo ${rev} >GIT_COMMIT_ID
+    (targetPlatform != hostPlatform)
-    ./boot
+    "${targetPlatform.config}-";
-    sed -i -e 's|-isysroot /Developer/SDKs/MacOSX10.5.sdk||' configure
+in
-  '' + stdenv.lib.optionalString (!stdenv.isDarwin) ''
+stdenv.mkDerivation (rec {
-    export NIX_LDFLAGS="$NIX_LDFLAGS -rpath $out/lib/ghc-${version}"
-  '' + stdenv.lib.optionalString stdenv.isDarwin ''
-    export NIX_LDFLAGS+=" -no_dtrace_dof"
-  '' + stdenv.lib.optionalString enableIntegerSimple ''
-    echo "INTEGER_LIBRARY=integer-simple" > mk/build.mk
-  '';
-in stdenv.mkDerivation (rec {
   inherit version rev;
   name = "ghc-${version}";
 
@@ -39,9 +39,22 @@ in stdenv.mkDerivation (rec {
 
   postPatch = "patchShebangs .";
 
-  preConfigure = commonPreConfigure;
+  preConfigure = ''
+    echo ${version} >VERSION
+    echo ${rev} >GIT_COMMIT_ID
+    ./boot
+    sed -i -e 's|-isysroot /Developer/SDKs/MacOSX10.5.sdk||' configure
+  '' + stdenv.lib.optionalString (!stdenv.isDarwin) ''
+    export NIX_LDFLAGS="$NIX_LDFLAGS -rpath $out/lib/ghc-${version}"
+  '' + stdenv.lib.optionalString stdenv.isDarwin ''
+    export NIX_LDFLAGS+=" -no_dtrace_dof"
+  '' + stdenv.lib.optionalString enableIntegerSimple ''
+    echo "INTEGER_LIBRARY=integer-simple" > mk/build.mk
+  '' + stdenv.lib.optionalString (targetPlatform != hostPlatform) ''
+    sed 's|#BuildFlavour  = quick-cross|BuildFlavour  = perf-cross|' mk/build.mk.sample > mk/build.mk
+  '';
 
-  buildInputs = commonBuildInputs;
+  buildInputs = [ ghc perl autoconf automake happy alex python3 ];
 
   enableParallelBuilding = true;
 
@@ -57,15 +70,15 @@ in stdenv.mkDerivation (rec {
 
   # required, because otherwise all symbols from HSffi.o are stripped, and
   # that in turn causes GHCi to abort
-  stripDebugFlags = [ "-S" ] ++ stdenv.lib.optional (!stdenv.isDarwin) "--keep-file-symbols";
+  stripDebugFlags = [ "-S" ] ++ stdenv.lib.optional (!targetPlatform.isDarwin) "--keep-file-symbols";
 
   checkTarget = "test";
 
   postInstall = ''
-    paxmark m $out/lib/${name}/bin/{ghc,haddock}
+    paxmark m $out/lib/${name}/bin/${if targetPlatform != hostPlatform then "ghc" else "{ghc,haddock}"}
 
     # Install the bash completion file.
-    install -D -m 444 utils/completion/ghc.bash $out/share/bash-completion/completions/ghc
+    install -D -m 444 utils/completion/ghc.bash $out/share/bash-completion/completions/${targetPrefix}ghc
 
     # Patch scripts to include "readelf" and "cat" in $PATH.
     for i in "$out/bin/"*; do
@@ -78,7 +91,7 @@ in stdenv.mkDerivation (rec {
   outputs = [ "out" "doc" ];
 
   passthru = {
-    inherit bootPkgs;
+    inherit bootPkgs targetPrefix;
   } // stdenv.lib.optionalAttrs (targetPlatform != buildPlatform) {
     crossCompiler = selfPkgs.ghc.override {
       cross = targetPlatform;
@@ -96,31 +109,23 @@ in stdenv.mkDerivation (rec {
 } // stdenv.lib.optionalAttrs (cross != null) {
   name = "${cross.config}-ghc-${version}";
 
-  preConfigure = commonPreConfigure + ''
-    sed 's|#BuildFlavour  = quick-cross|BuildFlavour  = perf-cross|' mk/build.mk.sample > mk/build.mk
-  '';
-
   configureFlags = [
     "CC=${stdenv.cc}/bin/${cross.config}-cc"
-    "LD=${stdenv.cc}/bin/${cross.config}-ld"
+    "LD=${stdenv.cc.bintools}/bin/${cross.config}-ld"
-    "AR=${stdenv.cc}/bin/${cross.config}-ar"
+    "AR=${stdenv.cc.bintools}/bin/${cross.config}-ar"
-    "NM=${stdenv.cc}/bin/${cross.config}-nm"
+    "NM=${stdenv.cc.bintools}/bin/${cross.config}-nm"
-    "RANLIB=${stdenv.cc}/bin/${cross.config}-ranlib"
+    "RANLIB=${stdenv.cc.bintools}/bin/${cross.config}-ranlib"
     "--target=${cross.config}"
     "--enable-bootstrap-with-devel-snapshot"
   ] ++
     # fix for iOS: https://www.reddit.com/r/haskell/comments/4ttdz1/building_an_osxi386_to_iosarm64_cross_compiler/d5qvd67/
-    lib.optional (cross.config or null == "aarch64-apple-darwin14") "--disable-large-address-space";
+    stdenv.lib.optional (cross.config or null == "aarch64-apple-darwin14") "--disable-large-address-space";
-
-  buildInputs = commonBuildInputs;
 
   configurePlatforms = [];
 
   passthru = {
     inherit bootPkgs cross;
-
     cc = "${stdenv.cc}/bin/${cross.config}-cc";
-
     ld = "${stdenv.cc}/bin/${cross.config}-ld";
   };
 })

pkgs/development/haskell-modules/generic-builder.nix

@@ -1,7 +1,14 @@
-{ stdenv, fetchurl, ghc, pkgconfig, glibcLocales, coreutils, gnugrep, gnused
+{ stdenv, buildPackages, ghc
-, jailbreak-cabal, hscolour, cpphs, nodejs, lib, removeReferencesTo
+, jailbreak-cabal, hscolour, cpphs, nodejs
+, buildPlatform, hostPlatform
 }:
-let isCross = (ghc.cross or null) != null; in
+
+let
+  isCross = buildPlatform != hostPlatform;
+  inherit (buildPackages)
+    fetchurl removeReferencesTo
+    pkgconfig coreutils gnugrep gnused glibcLocales;
+in
 
 { pname
 , dontStrip ? (ghc.isGhcjs or false)
@@ -20,8 +27,8 @@ let isCross = (ghc.cross or null) != null; in
 , enableLibraryProfiling ? false
 , enableExecutableProfiling ? false
 # TODO enable shared libs for cross-compiling
-, enableSharedExecutables ? !isCross && (((ghc.isGhcjs or false) || stdenv.lib.versionOlder "7.7" ghc.version))
+, enableSharedExecutables ? ((ghc.isGhcjs or false) || stdenv.lib.versionOlder "7.7" ghc.version)
-, enableSharedLibraries ? !isCross && (((ghc.isGhcjs or false) || stdenv.lib.versionOlder "7.7" ghc.version))
+, enableSharedLibraries ? ((ghc.isGhcjs or false) || stdenv.lib.versionOlder "7.7" ghc.version)
 , enableSplitObjs ? null # OBSOLETE, use enableDeadCodeElimination
 , enableDeadCodeElimination ? (!stdenv.isDarwin)  # TODO: use -dead_strip  for darwin
 , enableStaticLibraries ? true
@@ -53,7 +60,7 @@ let isCross = (ghc.cross or null) != null; in
 , shellHook ? ""
 , coreSetup ? false # Use only core packages to build Setup.hs.
 , useCpphs ? false
-, hardeningDisable ? lib.optional (ghc.isHaLVM or false) "all"
+, hardeningDisable ? stdenv.lib.optional (ghc.isHaLVM or false) "all"
 , enableSeparateDataOutput ? false
 , enableSeparateDocOutput ? doHaddock
 } @ args:
@@ -102,11 +109,12 @@ let
   enableParallelBuilding = (versionOlder "7.8" ghc.version && !hasActiveLibrary) || versionOlder "8.0.1" ghc.version;
 
   crossCabalFlags = [
-    "--with-ghc=${ghc.cross.config}-ghc"
+    "--with-ghc=${ghc.targetPrefix}ghc"
-    "--with-ghc-pkg=${ghc.cross.config}-ghc-pkg"
+    "--with-ghc-pkg=${ghc.targetPrefix}ghc-pkg"
-    "--with-gcc=${ghc.cc}"
+    "--with-gcc=${stdenv.cc.targetPrefix}cc"
-    "--with-ld=${ghc.ld}"
+    "--with-ld=${stdenv.cc.bintools.targetPrefix}ld"
-    "--with-hsc2hs=${nativeGhc}/bin/hsc2hs"
+    "--with-hsc2hs=${nativeGhc}/bin/hsc2hs" # not cross one
+    "--with-strip=${stdenv.cc.bintools.targetPrefix}strip"
   ] ++ (if isHaLVM then [] else ["--hsc2hs-options=--cross-compile"]);
 
   crossCabalFlagsString =
@@ -135,7 +143,7 @@ let
   ] ++ optionals isGhcjs [
     "--ghcjs"
   ] ++ optionals isCross ([
-    "--configure-option=--host=${ghc.cross.config}"
+    "--configure-option=--host=${hostPlatform.config}"
   ] ++ crossCabalFlags);
 
   setupCompileFlags = [
@@ -171,8 +179,7 @@ let
   setupBuilder = if isCross then "${nativeGhc}/bin/ghc" else ghcCommand;
   setupCommand = "./Setup";
   ghcCommand' = if isGhcjs then "ghcjs" else "ghc";
-  crossPrefix = if (ghc.cross or null) != null then "${ghc.cross.config}-" else "";
+  ghcCommand = "${ghc.targetPrefix}${ghcCommand'}";
-  ghcCommand = "${crossPrefix}${ghcCommand'}";
   ghcCommandCaps= toUpper ghcCommand';
 
 in
@@ -269,6 +276,8 @@ stdenv.mkDerivation ({
     runHook postCompileBuildDriver
   '';
 
+  inherit configureFlags;
+
   configurePhase = ''
     runHook preConfigure
 
@@ -402,7 +411,6 @@ stdenv.mkDerivation ({
 // optionalAttrs (postCompileBuildDriver != "") { inherit postCompileBuildDriver; }
 // optionalAttrs (preUnpack != "")      { inherit preUnpack; }
 // optionalAttrs (postUnpack != "")     { inherit postUnpack; }
-// optionalAttrs (configureFlags != []) { inherit configureFlags; }
 // optionalAttrs (patches != [])        { inherit patches; }
 // optionalAttrs (patchPhase != "")     { inherit patchPhase; }
 // optionalAttrs (preConfigure != "")   { inherit preConfigure; }
@@ -421,5 +429,5 @@ stdenv.mkDerivation ({
 // optionalAttrs (postFixup != "")      { inherit postFixup; }
 // optionalAttrs (dontStrip)            { inherit dontStrip; }
 // optionalAttrs (hardeningDisable != []) { inherit hardeningDisable; }
-// optionalAttrs (stdenv.isLinux)       { LOCALE_ARCHIVE = "${glibcLocales}/lib/locale/locale-archive"; }
+// optionalAttrs (buildPlatform.isLinux){ LOCALE_ARCHIVE = "${glibcLocales}/lib/locale/locale-archive"; }
 )

pkgs/development/haskell-modules/make-package-set.nix

@@ -1,7 +1,10 @@
 # This expression takes a file like `hackage-packages.nix` and constructs
 # a full package set out of that.
 
-{ # package-set used for non-haskell dependencies (all of nixpkgs)
+{ # package-set used for build tools (all of nixpkgs)
+  buildPackages
+
+, # package-set used for non-haskell dependencies (all of nixpkgs)
   pkgs
 
 , # stdenv to use for building haskell packages
@@ -28,19 +31,21 @@
 self:
 
 let
+  inherit (stdenv) buildPlatform hostPlatform;
 
   inherit (stdenv.lib) fix' extends makeOverridable;
   inherit (haskellLib) overrideCabal;
 
+  buildHaskellPackages = if hostPlatform != buildPlatform
+                         then self.ghc.bootPkgs
+                         else self;
+
   mkDerivationImpl = pkgs.callPackage ./generic-builder.nix {
     inherit stdenv;
-    inherit (pkgs) fetchurl pkgconfig glibcLocales coreutils gnugrep gnused;
+    nodejs = buildPackages.nodejs-slim;
-    nodejs = pkgs.nodejs-slim;
+    inherit (buildHaskellPackages) jailbreak-cabal;
-    jailbreak-cabal = if (self.ghc.cross or null) != null
-      then self.ghc.bootPkgs.jailbreak-cabal
-      else self.jailbreak-cabal;
     inherit (self) ghc;
-    hscolour = overrideCabal self.hscolour (drv: {
+    hscolour = overrideCabal buildHaskellPackages.hscolour (drv: {
       isLibrary = false;
       doHaddock = false;
       hyperlinkSource = false;      # Avoid depending on hscolour for this build.
@@ -95,7 +100,7 @@ let
   defaultScope = mkScope self;
   callPackage = drv: args: callPackageWithScope defaultScope drv args;
 
-  withPackages = packages: callPackage ./with-packages-wrapper.nix {
+  withPackages = packages: buildPackages.callPackage ./with-packages-wrapper.nix {
     inherit (self) llvmPackages;
     haskellPackages = self;
     inherit packages;
@@ -104,13 +109,13 @@ let
   haskellSrc2nix = { name, src, sha256 ? null }:
     let
       sha256Arg = if isNull sha256 then "--sha256=" else ''--sha256="${sha256}"'';
-    in pkgs.stdenv.mkDerivation {
+    in pkgs.buildPackages.stdenv.mkDerivation {
       name = "cabal2nix-${name}";
-      buildInputs = [ pkgs.haskellPackages.cabal2nix ];
+      nativeBuildInputs = [ pkgs.buildPackages.haskellPackages.cabal2nix ];
       preferLocalBuild = true;
       phases = ["installPhase"];
       LANG = "en_US.UTF-8";
-      LOCALE_ARCHIVE = pkgs.lib.optionalString pkgs.stdenv.isLinux "${pkgs.glibcLocales}/lib/locale/locale-archive";
+      LOCALE_ARCHIVE = pkgs.lib.optionalString buildPlatform.isLinux "${buildPackages.glibcLocales}/lib/locale/locale-archive";
       installPhase = ''
         export HOME="$TMP"
         mkdir -p "$out"

pkgs/development/haskell-modules/with-packages-wrapper.nix

@@ -1,4 +1,4 @@
-{ stdenv, lib, ghc, llvmPackages, packages, symlinkJoin, makeWrapper
+{ lib, targetPlatform, ghc, llvmPackages, packages, symlinkJoin, makeWrapper
 , ignoreCollisions ? false, withLLVM ? false
 , postBuild ? ""
 , haskellPackages
@@ -37,8 +37,7 @@ let
   ghc761OrLater = isGhcjs || isHaLVM || lib.versionOlder "7.6.1" ghc.version;
   packageDBFlag = if ghc761OrLater then "--global-package-db" else "--global-conf";
   ghcCommand'    = if isGhcjs then "ghcjs" else "ghc";
-  crossPrefix = if (ghc.cross or null) != null then "${ghc.cross.config}-" else "";
+  ghcCommand = "${ghc.targetPrefix}${ghcCommand'}";
-  ghcCommand = "${crossPrefix}${ghcCommand'}";
   ghcCommandCaps= lib.toUpper ghcCommand';
   libDir        = if isHaLVM then "$out/lib/HaLVM-${ghc.version}" else "$out/lib/${ghcCommand}-${ghc.version}";
   docDir        = "$out/share/doc/ghc/html";
@@ -49,7 +48,7 @@ let
   # https://downloads.haskell.org/~ghc/latest/docs/html/users_guide/code-generators.html
   llvm          = lib.makeBinPath
                   ([ llvmPackages.llvm ]
-                   ++ lib.optional stdenv.isDarwin llvmPackages.clang);
+                   ++ lib.optional targetPlatform.isDarwin llvmPackages.clang);
 in
 if paths == [] && !withLLVM then ghc else
 symlinkJoin {
@@ -99,7 +98,7 @@ symlinkJoin {
         makeWrapper ${ghc}/bin/$prg $out/bin/$prg --add-flags "${packageDBFlag}=${packageCfgDir}"
       fi
     done
-  '' + (lib.optionalString stdenv.isDarwin ''
+  '' + (lib.optionalString targetPlatform.isDarwin ''
     # Work around a linker limit in macOS Sierra (see generic-builder.nix):
     local packageConfDir="$out/lib/${ghc.name}/package.conf.d";
     local dynamicLinksDir="$out/lib/links"

pkgs/os-specific/darwin/ghc-standalone-archive/default.nix

@@ -2,8 +2,7 @@
 { haskellPackages, src, deps ? p : [], name }: let
   inherit (haskellPackages) ghc ghcWithPackages;
   with-env = ghcWithPackages deps;
-  crossPrefix = if (ghc.cross or null) != null then "${ghc.cross.config}-" else "";
+  ghcName = "${ghc.targetPrefix}ghc";
-  ghcName = "${crossPrefix}ghc";
 in runCommand name { buildInputs = [ with-env cctools ]; } ''
   mkdir -p $out/lib
   mkdir -p $out/include