Merge pull request #74090 from obsidiansystems/ghcjs-cross-without-cc

stdenv, haskell: bonafied GHCJS cross compilation without stdenv.cc

lib/systems/doubles.nix

@@ -27,6 +27,8 @@ let
     "riscv32-linux" "riscv64-linux"
 
     "aarch64-none" "avr-none" "arm-none" "i686-none" "x86_64-none" "powerpc-none" "msp430-none" "riscv64-none" "riscv32-none" "vc4-none"
+
+    "js-ghcjs"
   ];
 
   allParsed = map parse.mkSystemFromString all;
@@ -46,6 +48,7 @@ in {
   mips    = filterDoubles predicates.isMips;
   riscv   = filterDoubles predicates.isRiscV;
   vc4     = filterDoubles predicates.isVc4;
+  js      = filterDoubles predicates.isJavaScript;
 
   cygwin  = filterDoubles predicates.isCygwin;
   darwin  = filterDoubles predicates.isDarwin;

lib/tests/systems.nix

@@ -12,7 +12,7 @@ let
     expected = lib.sort lib.lessThan y;
   };
 in with lib.systems.doubles; lib.runTests {
-  testall = mseteq all (linux ++ darwin ++ freebsd ++ openbsd ++ netbsd ++ illumos ++ wasi ++ windows ++ embedded);
+  testall = mseteq all (linux ++ darwin ++ freebsd ++ openbsd ++ netbsd ++ illumos ++ wasi ++ windows ++ embedded ++ js);
 
   testarm = mseteq arm [ "armv5tel-linux" "armv6l-linux" "armv7a-linux" "armv7l-linux" "arm-none" "armv7a-darwin" ];
   testi686 = mseteq i686 [ "i686-linux" "i686-freebsd" "i686-netbsd" "i686-openbsd" "i686-cygwin" "i686-windows" "i686-none" "i686-darwin" ];

pkgs/build-support/bintools-wrapper/default.nix

@@ -66,7 +66,7 @@ let
     else null;
 
   expand-response-params =
-    if buildPackages.stdenv.cc or null != null && buildPackages.stdenv.cc != "/dev/null"
+    if buildPackages ? stdenv && buildPackages.stdenv.hasCC && buildPackages.stdenv.cc != "/dev/null"
     then import ../expand-response-params { inherit (buildPackages) stdenv; }
     else "";
 

pkgs/build-support/cc-wrapper/default.nix

@@ -59,7 +59,7 @@ let
   infixSalt = replaceStrings ["-" "."] ["_" "_"] targetPlatform.config;
 
   expand-response-params =
-    if buildPackages.stdenv.cc or null != null && buildPackages.stdenv.cc != "/dev/null"
+    if buildPackages.stdenv.hasCC && buildPackages.stdenv.cc != "/dev/null"
     then import ../expand-response-params { inherit (buildPackages) stdenv; }
     else "";
 

pkgs/development/compilers/ghcjs-ng/default.nix

@@ -1,4 +1,5 @@
 { stdenv
+, pkgsHostHost
 , callPackage
 , fetchgit
 , ghcjsSrcJson ? null
@@ -14,7 +15,6 @@
 , pkgconfig
 , gcc
 , lib
-, nodePackages
 , ghcjsDepOverrides ? (_:_:{})
 , haskell
 }:
@@ -46,7 +46,7 @@ let
 
     enableShared = true;
 
-    socket-io = nodePackages."socket.io";
+    socket-io = pkgsHostHost.nodePackages."socket.io";
 
     # Relics of the old GHCJS build system
     stage1Packages = [];

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

@@ -40,7 +40,7 @@ in
 # They must be propagated to the environment of any executable linking with the library
 , libraryFrameworkDepends ? [], executableFrameworkDepends ? []
 , homepage ? "https://hackage.haskell.org/package/${pname}"
-, platforms ? with stdenv.lib.platforms; unix ++ windows # GHC can cross-compile
+, platforms ? with stdenv.lib.platforms; all # GHC can cross-compile
 , hydraPlatforms ? null
 , hyperlinkSource ? true
 , isExecutable ? false, isLibrary ? !isExecutable
@@ -131,9 +131,13 @@ let
                    '';
 
   crossCabalFlags = [
-    "--with-ghc=${ghc.targetPrefix}ghc"
+    "--with-ghc=${ghcCommand}"
     "--with-ghc-pkg=${ghc.targetPrefix}ghc-pkg"
-    "--with-gcc=${stdenv.cc.targetPrefix}cc"
+    # Pass the "wrong" C compiler rather than none at all so packages that just
+    # use the C preproccessor still work, see
+    # https://github.com/haskell/cabal/issues/6466 for details.
+    "--with-gcc=${(if stdenv.hasCC then stdenv else buildPackages.stdenv).cc.targetPrefix}cc"
+  ] ++ optionals stdenv.hasCC [
     "--with-ld=${stdenv.cc.bintools.targetPrefix}ld"
     "--with-ar=${stdenv.cc.bintools.targetPrefix}ar"
     # use the one that comes with the cross compiler.
@@ -156,7 +160,9 @@ let
     "--libsubdir=\\$abi/\\$libname"
     (optionalString enableSeparateDataOutput "--datadir=$data/share/${ghc.name}")
     (optionalString enableSeparateDocOutput "--docdir=${docdir "$doc"}")
+  ] ++ optionals stdenv.hasCC [
     "--with-gcc=$CC" # Clang won't work without that extra information.
+  ] ++ [
     "--package-db=$packageConfDir"
     (optionalString (enableSharedExecutables && stdenv.isLinux) "--ghc-option=-optl=-Wl,-rpath=$out/lib/${ghc.name}/${pname}-${version}")
     (optionalString (enableSharedExecutables && stdenv.isDarwin) "--ghc-option=-optl=-Wl,-headerpad_max_install_names")

pkgs/development/haskell-modules/hoogle.nix

@@ -23,7 +23,8 @@
 # This will build mmorph and monadControl, and have the hoogle installation
 # refer to their documentation via symlink so they are not garbage collected.
 
-{ lib, stdenv, hoogle, writeText, ghc
+{ lib, stdenv, buildPackages
+, hoogle, writeText, ghc
 , packages
 }:
 
@@ -53,7 +54,7 @@ let
     (map (lib.getOutput "doc") packages);
 
 in
-stdenv.mkDerivation {
+buildPackages.stdenv.mkDerivation {
   name = "hoogle-local-0.1";
   buildInputs = [ghc hoogle];
 

pkgs/development/interpreters/perl/default.nix

@@ -144,7 +144,7 @@ let
         substituteInPlace "$out"/lib/perl5/*/*/Config_heavy.pl \
           --replace "${libcInc}" /no-such-path \
           --replace "${
-              if stdenv.cc.cc or null != null then stdenv.cc.cc else "/no-such-path"
+              if stdenv.hasCC then stdenv.cc.cc else "/no-such-path"
             }" /no-such-path \
           --replace "${stdenv.cc}" /no-such-path \
           --replace "$man" /no-such-path

pkgs/stdenv/booter.nix

@@ -121,9 +121,16 @@ stageFuns: let
   postStage = buildPackages: {
     __raw = true;
     stdenv.cc =
-      if buildPackages.stdenv.cc.isClang or false
-      then buildPackages.clang
-      else buildPackages.gcc;
+      if buildPackages.stdenv.hasCC
+      then
+        if buildPackages.stdenv.cc.isClang or false
+        then buildPackages.clang
+        else buildPackages.gcc
+      else
+        # This will blow up if anything uses it, but that's OK. The `if
+        # buildPackages.stdenv.cc.isClang then ... else ...` would blow up
+        # everything, so we make sure to avoid that.
+        buildPackages.stdenv.cc;
   };
 
 in dfold folder postStage (_: {}) withAllowCustomOverrides

pkgs/stdenv/cross/default.nix

@@ -51,12 +51,18 @@ in lib.init bootStages ++ [
       extraBuildInputs = [ ]; # Old ones run on wrong platform
       allowedRequisites = null;
 
+      hasCC = !targetPlatform.isGhcjs;
+
       cc = if crossSystem.useiOSPrebuilt or false
              then buildPackages.darwin.iosSdkPkgs.clang
            else if crossSystem.useAndroidPrebuilt or false
              then buildPackages."androidndkPkgs_${crossSystem.ndkVer}".clang
            else if targetPlatform.isGhcjs
-             then null
+             # Need to use `throw` so tryEval for splicing works, ugh.  Using
+             # `null` or skipping the attribute would cause an eval failure
+             # `tryEval` wouldn't catch, wrecking accessing previous stages
+             # when there is a C compiler and everything should be fine.
+             then throw "no C compiler provided for this platform"
            else if crossSystem.useLLVM or false
              then buildPackages.llvmPackages_8.lldClang
            else buildPackages.gcc;

pkgs/stdenv/generic/default.nix

@@ -1,6 +1,15 @@
 let lib = import ../../../lib; in lib.makeOverridable (
 
-{ name ? "stdenv", preHook ? "", initialPath, cc, shell
+{ name ? "stdenv", preHook ? "", initialPath
+
+, # If we don't have a C compiler, we might either have `cc = null` or `cc =
+  # throw ...`, but if we do have a C compiler we should definiely have `cc !=
+  # null`.
+  #
+  # TODO(@Ericson2314): Add assert without creating infinite recursion
+  hasCC ? cc != null, cc
+
+, shell
 , allowedRequisites ? null, extraAttrs ? {}, overrides ? (self: super: {}), config
 
 , # The `fetchurl' to use for downloading curl and its dependencies
@@ -57,7 +66,8 @@ let
       ../../build-support/setup-hooks/move-sbin.sh
       ../../build-support/setup-hooks/move-lib64.sh
       ../../build-support/setup-hooks/set-source-date-epoch-to-latest.sh
-      cc
+      # TODO use lib.optional instead
+      (if hasCC then cc else null)
     ];
 
   defaultBuildInputs = extraBuildInputs;
@@ -145,7 +155,7 @@ let
 
       inherit overrides;
 
-      inherit cc;
+      inherit cc hasCC;
     }
 
     # Propagate any extra attributes.  For instance, we use this to

pkgs/top-level/all-packages.nix

@@ -8473,7 +8473,7 @@ in
 
   llvmPackages_35 = callPackage ../development/compilers/llvm/3.5 ({
     isl = isl_0_14;
-  } // stdenv.lib.optionalAttrs (stdenv.cc.isGNU && stdenv.hostPlatform.isi686) {
+  } // stdenv.lib.optionalAttrs (stdenv.hostPlatform.isi686 && stdenv.cc.isGNU) {
     stdenv = gcc6Stdenv;
   });
 
@@ -8481,7 +8481,7 @@ in
     inherit (stdenvAdapters) overrideCC;
     buildLlvmTools = buildPackages.llvmPackages_39.tools;
     targetLlvmLibraries = targetPackages.llvmPackages_39.libraries;
-  } // stdenv.lib.optionalAttrs (stdenv.cc.isGNU && stdenv.hostPlatform.isi686) {
+  } // stdenv.lib.optionalAttrs (stdenv.hostPlatform.isi686 && stdenv.cc.isGNU) {
     stdenv = gcc6Stdenv;
   });
 
@@ -8489,7 +8489,7 @@ in
     inherit (stdenvAdapters) overrideCC;
     buildLlvmTools = buildPackages.llvmPackages_4.tools;
     targetLlvmLibraries = targetPackages.llvmPackages_4.libraries;
-  } // stdenv.lib.optionalAttrs (stdenv.cc.isGNU && stdenv.hostPlatform.isi686) {
+  } // stdenv.lib.optionalAttrs (stdenv.hostPlatform.isi686 && stdenv.cc.isGNU) {
     stdenv = gcc6Stdenv;
   });
 
@@ -8497,7 +8497,7 @@ in
     inherit (stdenvAdapters) overrideCC;
     buildLlvmTools = buildPackages.llvmPackages_5.tools;
     targetLlvmLibraries = targetPackages.llvmPackages_5.libraries;
-  } // stdenv.lib.optionalAttrs (stdenv.cc.isGNU && stdenv.hostPlatform.isi686) {
+  } // stdenv.lib.optionalAttrs (stdenv.hostPlatform.isi686 && stdenv.cc.isGNU) {
     stdenv = gcc6Stdenv; # with gcc-7: undefined reference to `__divmoddi4'
   });
 
@@ -8505,7 +8505,7 @@ in
     inherit (stdenvAdapters) overrideCC;
     buildLlvmTools = buildPackages.llvmPackages_6.tools;
     targetLlvmLibraries = targetPackages.llvmPackages_6.libraries;
-  } // stdenv.lib.optionalAttrs (stdenv.cc.isGNU && stdenv.hostPlatform.isi686) {
+  } // stdenv.lib.optionalAttrs (stdenv.hostPlatform.isi686 && stdenv.cc.isGNU) {
     # with gcc-7 on i686: undefined reference to `__divmoddi4'
     # Failing tests with gcc8.
     stdenv = overrideCC stdenv (if stdenv.hostPlatform.isi686 then gcc6 else gcc7);
@@ -8515,7 +8515,7 @@ in
     inherit (stdenvAdapters) overrideCC;
     buildLlvmTools = buildPackages.llvmPackages_7.tools;
     targetLlvmLibraries = targetPackages.llvmPackages_7.libraries;
-  } // stdenv.lib.optionalAttrs (buildPackages.stdenv.cc.isGNU && stdenv.hostPlatform.isi686) {
+  } // stdenv.lib.optionalAttrs (stdenv.hostPlatform.isi686 && buildPackages.stdenv.cc.isGNU) {
     stdenv = gcc6Stdenv; # with gcc-7: undefined reference to `__divmoddi4'
   });
 
@@ -8523,7 +8523,7 @@ in
     inherit (stdenvAdapters) overrideCC;
     buildLlvmTools = buildPackages.llvmPackages_8.tools;
     targetLlvmLibraries = targetPackages.llvmPackages_8.libraries;
-  } // stdenv.lib.optionalAttrs (buildPackages.stdenv.cc.isGNU && stdenv.hostPlatform.isi686) {
+  } // stdenv.lib.optionalAttrs (stdenv.hostPlatform.isi686 && buildPackages.stdenv.cc.isGNU) {
     stdenv = gcc6Stdenv; # with gcc-7: undefined reference to `__divmoddi4'
   });
 
@@ -8531,7 +8531,7 @@ in
     inherit (stdenvAdapters) overrideCC;
     buildLlvmTools = buildPackages.llvmPackages_9.tools;
     targetLlvmLibraries = targetPackages.llvmPackages_9.libraries;
-  } // stdenv.lib.optionalAttrs (buildPackages.stdenv.cc.isGNU && stdenv.hostPlatform.isi686) {
+  } // stdenv.lib.optionalAttrs (stdenv.hostPlatform.isi686 && buildPackages.stdenv.cc.isGNU) {
     stdenv = gcc6Stdenv; # with gcc-7: undefined reference to `__divmoddi4'
   });
 
@@ -9406,7 +9406,7 @@ in
   spidermonkey_1_8_5 = callPackage ../development/interpreters/spidermonkey/1.8.5.nix { };
   spidermonkey_38 = callPackage ../development/interpreters/spidermonkey/38.nix ({
     inherit (darwin) libobjc;
-  } // (stdenv.lib.optionalAttrs (stdenv.cc.isGNU && stdenv.hostPlatform.isi686) {
+  } // (stdenv.lib.optionalAttrs (stdenv.hostPlatform.isi686 && stdenv.cc.isGNU) {
       stdenv = gcc6Stdenv; # with gcc-7: undefined reference to `__divmoddi4'
   }));
   spidermonkey_60 = callPackage ../development/interpreters/spidermonkey/60.nix { };
@@ -10787,7 +10787,7 @@ in
 
   arrow-cpp = callPackage ../development/libraries/arrow-cpp ({
     gtest = gtest.override { static = true; };
-  } // stdenv.lib.optionalAttrs (stdenv.cc.isGNU && stdenv.hostPlatform.isi686) {
+  } // stdenv.lib.optionalAttrs (stdenv.hostPlatform.isi686 && stdenv.cc.isGNU) {
     stdenv = overrideCC stdenv buildPackages.gcc6; # hidden symbol `__divmoddi4'
   });
 
@@ -11869,27 +11869,27 @@ in
   icu58 = callPackage (import ../development/libraries/icu/58.nix fetchurl) ({
     nativeBuildRoot = buildPackages.icu58.override { buildRootOnly = true; };
   } //
-    (stdenv.lib.optionalAttrs (stdenv.cc.isGNU && stdenv.hostPlatform.isi686) {
+    (stdenv.lib.optionalAttrs (stdenv.hostPlatform.isi686 && stdenv.cc.isGNU) {
       stdenv = gcc6Stdenv; # with gcc-7: undefined reference to `__divmoddi4'
     }));
   icu59 = callPackage ../development/libraries/icu/59.nix ({
     nativeBuildRoot = buildPackages.icu59.override { buildRootOnly = true; };
-  } // (stdenv.lib.optionalAttrs (stdenv.cc.isGNU && stdenv.hostPlatform.isi686) {
+  } // (stdenv.lib.optionalAttrs (stdenv.hostPlatform.isi686 && stdenv.cc.isGNU) {
       stdenv = gcc6Stdenv; # with gcc-7: undefined reference to `__divmoddi4'
     }));
   icu60 = callPackage ../development/libraries/icu/60.nix ({
     nativeBuildRoot = buildPackages.icu60.override { buildRootOnly = true; };
-  } // (stdenv.lib.optionalAttrs (stdenv.cc.isGNU && stdenv.hostPlatform.isi686) {
+  } // (stdenv.lib.optionalAttrs (stdenv.hostPlatform.isi686 && stdenv.cc.isGNU) {
       stdenv = gcc6Stdenv; # with gcc-7: undefined reference to `__divmoddi4'
     }));
   icu63 = callPackage ../development/libraries/icu/63.nix ({
     nativeBuildRoot = buildPackages.icu63.override { buildRootOnly = true; };
-  } // (stdenv.lib.optionalAttrs (stdenv.cc.isGNU && stdenv.hostPlatform.isi686) {
+  } // (stdenv.lib.optionalAttrs (stdenv.hostPlatform.isi686 && stdenv.cc.isGNU) {
       stdenv = gcc6Stdenv; # with gcc-7: undefined reference to `__divmoddi4'
     }));
   icu64 = callPackage ../development/libraries/icu/64.nix ({
     nativeBuildRoot = buildPackages.icu64.override { buildRootOnly = true; };
-  } // (stdenv.lib.optionalAttrs (stdenv.cc.isGNU && stdenv.hostPlatform.isi686) {
+  } // (stdenv.lib.optionalAttrs (stdenv.hostPlatform.isi686 && stdenv.cc.isGNU) {
       stdenv = gcc6Stdenv; # with gcc-7: undefined reference to `__divmoddi4'
     }));
 

pkgs/top-level/release-cross.nix

@@ -135,6 +135,11 @@ in
   /* Linux on the fuloong */
   fuloongminipc = mapTestOnCross lib.systems.examples.fuloongminipc linuxCommon;
 
+  /* Javacript */
+  ghcjs = mapTestOnCross lib.systems.examples.ghcjs {
+    haskell.packages.ghcjs.hello = nativePlatforms;
+  };
+
   /* Linux on Raspberrypi */
   rpi = mapTestOnCross lib.systems.examples.raspberryPi rpiCommon;
   rpi-musl = mapTestOnCross lib.systems.examples.muslpi rpiCommon;