Add the Mercury compiler to nixpkgs.

pkgs/development/compilers/mercury/default.nix

@@ -0,0 +1,62 @@
+{ stdenv, fetchurl, gcc, flex, bison, texinfo, jdk, erlang, makeWrapper
+, readline }:
+
+stdenv.mkDerivation rec {
+  name    = "mercury-${version}";
+  version = "14.01";
+
+  src = fetchurl {
+    url    = "http://dl.mercurylang.org/release/mercury-srcdist-${version}.tar.gz";
+    sha256 = "1hgwmsaacxhgx2p2hikl5px8xf0wny9wx47gjl258dgxxasbfij4";
+  };
+
+  buildInputs = [ gcc flex bison texinfo jdk erlang makeWrapper
+                  readline ];
+
+  patchPhase = ''
+    # Fix calls to programs in /bin
+    for p in uname pwd ; do
+      for f in $(egrep -lr /bin/$p *) ; do
+        sed -i 's@/bin/'$p'@'$p'@g' $f ;
+      done
+    done
+  '';
+
+  preConfigure = ''
+    ensureDir $out/lib/mercury/cgi-bin ;
+    configureFlags="--enable-deep-profiler=$out/lib/mercury/cgi-bin";
+  '';
+
+  preBuild = ''
+    # Mercury buildsystem does not take -jN directly.
+    makeFlags="PARALLEL=-j$NIX_BUILD_CORES" ;
+  '';
+
+  postInstall = ''
+    # Wrap with compilers for the different targets.
+    for e in $(ls $out/bin) ; do
+      wrapProgram $out/bin/$e \
+        --prefix PATH ":" "${gcc}/bin" \
+        --prefix PATH ":" "${jdk}/bin" \
+        --prefix PATH ":" "${erlang}/bin"
+    done
+  '';
+
+  meta = {
+    description = "Mercury is a pure logic programming language.";
+    longDescription = ''
+      Mercury is a logic/functional programming language which combines the
+      clarity and expressiveness of declarative programming with advanced
+      static analysis and error detection features.  Its highly optimized
+      execution algorithm delivers efficiency far in excess of existing logic
+      programming systems, and close to conventional programming systems.
+      Mercury addresses the problems of large-scale program development,
+      allowing modularity, separate compilation, and numerous optimization/time
+      trade-offs.
+    '';
+    homepage    = "http://mercurylang.org";
+    license     = stdenv.lib.licenses.gpl2;
+    platforms = stdenv.lib.platforms.linux;
+    maintainers = [ ];
+  };
+}

pkgs/top-level/all-packages.nix

@@ -3047,6 +3047,8 @@ let
     callPackage_i686 ../development/compilers/mentor {}
   );
 
+  mercury = callPackage ../development/compilers/mercury { };
+
   mitscheme = callPackage ../development/compilers/mit-scheme { };
 
   mlton = callPackage ../development/compilers/mlton { };