uboot: (firmwareOdroidC2/C4) don't invoke patch tool, use patches = [] instead

https://github.com/NixOS/nixpkgs/blob/master/pkgs/stdenv/generic/setup.sh#L948
this can do it nicely.

Signed-off-by: Anton Arapov <anton@deadbeef.mx>

pkgs/development/compilers/polyml/default.nix

@@ -0,0 +1,44 @@
+{ lib
+, stdenv
+, fetchFromGitHub
+, autoreconfHook
+, gmp
+, libffi
+}:
+
+stdenv.mkDerivation rec {
+  pname = "polyml";
+  version = "5.9";
+
+  prePatch = lib.optionalString stdenv.isDarwin ''
+    substituteInPlace configure.ac --replace stdc++ c++
+  '';
+
+  buildInputs = [ libffi gmp ];
+
+  nativeBuildInputs = lib.optional stdenv.isDarwin autoreconfHook;
+
+  configureFlags = [
+    "--enable-shared"
+    "--with-system-libffi"
+    "--with-gmp"
+  ];
+
+  src = fetchFromGitHub {
+    owner = "polyml";
+    repo = "polyml";
+    rev = "v${version}";
+    sha256 = "sha256-4oo4AB54CivhS99RuZVTP9+Ic0CDpsBb+OiHvOhmZnM=";
+  };
+
+  meta = with lib; {
+    description = "Standard ML compiler and interpreter";
+    longDescription = ''
+      Poly/ML is a full implementation of Standard ML.
+    '';
+    homepage = "https://www.polyml.org/";
+    license = licenses.lgpl21;
+    platforms = with platforms; (linux ++ darwin);
+    maintainers = with maintainers; [ maggesi kovirobi ];
+  };
+}