* adding ghc-6.8 even though it still segfaults on my machine

(it's marked lowPrio for now, so it shouldn't break anything)

svn path=/nixpkgs/trunk/; revision=9482

pkgs/development/compilers/ghc-6.8/builder.sh

@@ -0,0 +1,26 @@
+source $stdenv/setup
+
+# Setup isolated package management
+postInstall()
+{
+    ensureDir "$out/nix-support"
+    echo "# Path to the GHC compiler directory in the store" > $out/nix-support/setup-hook
+    echo "ghc=$out" >> $out/nix-support/setup-hook
+    echo ""         >> $out/nix-support/setup-hook
+    cat $setupHook  >> $out/nix-support/setup-hook
+}
+postInstall=postInstall
+
+configureFlags="--with-gmp-libraries=$gmp/lib --with-readline-libraries=\"$readline/lib\""
+
+preConfigure()
+{
+    chmod u+x rts/gmp/configure
+    # still requires a hack for ncurses
+    sed -i "s|^\(library-dirs.*$\)|\1 \"$ncurses/lib\"|" libraries/readline/package.conf.in
+}
+preConfigure=preConfigure
+
+
+# Standard configure/make/make install
+genericBuild

pkgs/development/compilers/ghc-6.8/default.nix

@@ -0,0 +1,41 @@
+{stdenv, fetchurl, readline, ghc, perl, m4, gmp, ncurses}:
+
+stdenv.mkDerivation (rec {
+  name = "ghc-6.8.0.20071018";
+  homepage = "http://www.haskell.org/ghc";
+
+  src = map fetchurl [
+    { url = "${homepage}/dist/stable/dist/${name}-src.tar.bz2";
+      md5 = "7e61bd2a55c2d6ed5a6d996d19d3f6bf";
+    }
+    { url = "${homepage}/dist/stable/dist/${name}-src-extralibs.tar.bz2";
+      md5 = "7b155c1d1e7daa492cc2161b3828a377";
+    }
+  ];
+
+  buildInputs = [ghc readline perl m4];
+
+  setupHook = ./setup-hook.sh;
+
+  meta = {
+    description = "The Glasgow Haskell Compiler v6.8 (snapshot)";
+  };
+
+  postInstall = "
+    ensureDir \"$out/nix-support\"
+    echo \"# Path to the GHC compiler directory in the store\" > $out/nix-support/setup-hook
+    echo \"ghc=$out\" >> $out/nix-support/setup-hook
+    echo \"\"         >> $out/nix-support/setup-hook
+    cat $setupHook    >> $out/nix-support/setup-hook
+  ";
+
+  configureFlags="--with-gmp-libraries=$gmp/lib --with-readline-libraries=\"$readline/lib\"";
+
+  # the presence of this file makes Cabal cry for happy while generating makefiles ...
+  preConfigure = "
+    echo 'GhcThreaded=NO' > mk/build.mk
+    rm libraries/haskell-src/Language/Haskell/Parser.ly
+  ";
+
+  inherit readline gmp ncurses;
+})

pkgs/development/compilers/ghc-6.8/setup-hook.sh

@@ -0,0 +1,41 @@
+# Support dir for isolating GHC
+ghc_support=$TMPDIR/ghc-6.6-nix-support
+mkdir -p $ghc_support
+
+# Create isolated package config
+packages_db=$ghc_support/package.conf
+cp $ghc/lib/ghc-*/package.conf $packages_db
+chmod +w $packages_db
+
+# Generate wrappers for GHC that use the isolated package config
+makeWrapper() {
+  wrapperName="$1"
+  wrapper="$ghc_support/$wrapperName"
+  shift #the other arguments are passed to the source app
+  echo '#!'"$SHELL" > "$wrapper"
+  echo "exec \"$ghc/bin/$wrapperName\" $@" '"$@"' > "$wrapper"
+  chmod +x "$wrapper"
+}
+
+makeWrapper "ghc"         "-no-user-package-conf -package-conf $packages_db"
+makeWrapper "ghci"        "-no-user-package-conf -package-conf $packages_db"
+makeWrapper "runghc"      "-no-user-package-conf -package-conf $packages_db"
+makeWrapper "runhaskell"  "-no-user-package-conf -package-conf $packages_db"
+makeWrapper "ghc-pkg"     "--global-conf $packages_db"
+
+# Add wrappers to search path
+export _PATH=$ghc_support:$_PATH
+
+# Env hook to add packages to the package config
+addLibToPackageConf ()
+{
+    local regscript=$1/nix-support/register-ghclib.sh
+    if test -f $regscript; then
+        local oldpath=$PATH
+        export PATH=$ghc_support:$PATH
+        sh $regscript $package_db
+        export PATH=$oldpath
+    fi
+}
+
+envHooks=(${envHooks[@]} addLibToPackageConf)

pkgs/top-level/all-packages.nix

@@ -890,6 +890,12 @@ rec {
 
   ghc = ghc661;
 
+  ghc68 = lowPrio (appendToName "snapshot" (import ../development/compilers/ghc-6.8 {
+    inherit fetchurl stdenv readline perl gmp ncurses;
+    m4 = gnum4;
+    ghc = ghcboot;
+  }));
+
   ghc661 = import ../development/compilers/ghc-6.6.1 {
     inherit fetchurl stdenv readline perl gmp ncurses;
     m4 = gnum4;