ghc-7.4.2: add binary snapshot required for bootstrapping ghc 7.7.x

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

@@ -0,0 +1,97 @@
+{stdenv, fetchurl, perl, ncurses, gmp}:
+
+let
+  supportedPlatforms = ["x86_64-linux" "i686-linux" "i686-darwin" "x86_64-darwin"];
+in
+
+assert stdenv.lib.elem stdenv.system supportedPlatforms;
+
+stdenv.mkDerivation rec {
+  version = "7.4.2";
+
+  name = "ghc-${version}-binary";
+
+  src =
+    if stdenv.system == "i686-linux" then
+      fetchurl {
+        url = "http://haskell.org/ghc/dist/${version}/ghc-${version}-i386-unknown-linux.tar.bz2";
+        sha256 = "0gny7knhss0w0d9r6jm1gghrcb8kqjvj94bb7hxf9syrk4fxlcxi";
+      }
+    else if stdenv.system == "x86_64-linux" then
+      fetchurl {
+        url = "http://haskell.org/ghc/dist/${version}/ghc-${version}-x86_64-unknown-linux.tar.bz2";
+        sha256 = "043jabd0lh6n1zlqhysngbpvlsdznsa2mmsj08jyqgahw9sjb5ns";
+      }
+    else if stdenv.system == "i686-darwin" then
+      fetchurl {
+        url = "http://haskell.org/ghc/dist/${version}/ghc-${version}-i386-apple-darwin.tar.bz2";
+        sha256 = "1vrbs3pzki37hzym1f1nh07lrqh066z3ypvm81fwlikfsvk4djc0";
+      }
+    else if stdenv.system == "x86_64-darwin" then
+      fetchurl {
+        url = "http://haskell.org/ghc/dist/${version}/ghc-${version}-x86_64-apple-darwin.tar.bz2";
+        sha256 = "1imzqc0slpg0r6p40n5a9m18cbcm0m86z8dgyhfxcckksw54mzwf";
+      }
+    else throw "cannot bootstrap GHC on this platform";
+
+  buildInputs = [perl];
+
+  postUnpack =
+    # Strip is harmful, see also below. It's important that this happens
+    # first. The GHC Cabal build system makes use of strip by default and
+    # has hardcoded paths to /usr/bin/strip in many places. We replace
+    # those below, making them point to our dummy script.
+     ''
+      mkdir "$TMP/bin"
+      for i in strip; do
+        echo '#!/bin/sh' >> "$TMP/bin/$i"
+        chmod +x "$TMP/bin/$i"
+        PATH="$TMP/bin:$PATH"
+      done
+     '' +
+    # We have to patch the GMP paths for the integer-gmp package.
+     ''
+      find . -name integer-gmp.buildinfo \
+          -exec sed -i "s@extra-lib-dirs: @extra-lib-dirs: ${gmp}/lib@" {} \;
+     '' +
+    # On Linux, use patchelf to modify the executables so that they can
+    # find editline/gmp.
+    (if stdenv.isLinux then ''
+      find . -type f -perm +100 \
+          -exec patchelf --interpreter "$(cat $NIX_GCC/nix-support/dynamic-linker)" \
+          --set-rpath "${ncurses}/lib:${gmp}/lib" {} \;
+      sed -i "s|/usr/bin/perl|perl\x00        |" ghc-${version}/ghc/stage2/build/tmp/ghc-stage2
+      sed -i "s|/usr/bin/gcc|gcc\x00        |" ghc-${version}/ghc/stage2/build/tmp/ghc-stage2
+      for prog in ld ar gcc strip ranlib; do
+        find . -name "setup-config" -exec sed -i "s@/usr/bin/$prog@$(type -p $prog)@g" {} \;
+      done
+     '' else "");
+
+  configurePhase = ''
+    ./configure --prefix=$out --with-gmp-libraries=${gmp}/lib --with-gmp-includes=${gmp}/include
+  '';
+
+  # Stripping combined with patchelf breaks the executables (they die
+  # with a segfault or the kernel even refuses the execve). (NIXPKGS-85)
+  dontStrip = true;
+
+  # No building is necessary, but calling make without flags ironically
+  # calls install-strip ...
+  buildPhase = "true";
+
+  postInstall =
+      ''
+        # Sanity check, can ghc create executables?
+        cd $TMP
+        mkdir test-ghc; cd test-ghc
+        cat > main.hs << EOF
+          module Main where
+          main = putStrLn "yes"
+        EOF
+        $out/bin/ghc --make main.hs
+        echo compilation ok
+        [ $(./main) == "yes" ]
+      '';
+
+  meta.platforms = supportedPlatforms;
+}

pkgs/top-level/haskell-defaults.nix

@@ -173,6 +173,10 @@
     gmp = pkgs.gmp4;
   });
 
+  ghc742Binary = lowPrio (callPackage ../development/compilers/ghc/7.4.2-binary.nix {
+    gmp = pkgs.gmp4;
+  });
+
   ghc6101BinaryDarwin = if stdenv.isDarwin then ghc704Binary else ghc6101Binary;
   ghc6121BinaryDarwin = if stdenv.isDarwin then ghc704Binary else ghc6121Binary;