1 files changed, 47 insertions, 0 deletions
diff --git a/nixpkgs/pkgs/development/compilers/mezzo/default.nix b/nixpkgs/pkgs/development/compilers/mezzo/default.nix
new file mode 100644
index 000000000000..a90076c9eccd
--- /dev/null
+++ b/nixpkgs/pkgs/development/compilers/mezzo/default.nix
@@ -0,0 +1,47 @@
+{ stdenv, fetchFromGitHub, ocaml, findlib, ocamlbuild, menhir, yojson, ulex, pprint, fix, functory }:
+
+if stdenv.lib.versionAtLeast ocaml.version "4.06"
+then throw "mezzo is not available for OCaml ${ocaml.version}"
+else
+
+let
+  check-ocaml-version = with stdenv.lib; versionAtLeast (getVersion ocaml);
+in
+
+assert check-ocaml-version "4";
+
+stdenv.mkDerivation {
+
+  name = "mezzo-0.0.m8";
+
+  src = fetchFromGitHub {
+    owner = "protz";
+    repo = "mezzo";
+    rev = "m8";
+    sha256 = "0yck5r6di0935s3iy2mm9538jkf77ssr789qb06ms7sivd7g3ip6";
+  };
+
+  buildInputs = [ ocaml findlib ocamlbuild yojson menhir ulex pprint fix functory ];
+
+  # Sets warning 3 as non-fatal
+  prePatch = stdenv.lib.optionalString (check-ocaml-version "4.02") ''
+    substituteInPlace myocamlbuild.pre.ml \
+    --replace '@1..3' '@1..2+3'
+  '';
+
+  createFindlibDestdir = true;
+
+  postInstall = ''
+    mkdir $out/bin
+    cp mezzo $out/bin/
+  '';
+
+  meta = with stdenv.lib; {
+    homepage = "http://protz.github.io/mezzo/";
+    description = "A programming language in the ML tradition, which places strong emphasis on the control of aliasing and access to mutable memory";
+    license = licenses.gpl2;
+    platforms = ocaml.meta.platforms or [];
+  };
+}
+
+