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/5.7.nix

@@ -0,0 +1,48 @@
+{ lib, stdenv, fetchFromGitHub, autoreconfHook, gmp, libffi, fetchpatch }:
+
+stdenv.mkDerivation rec {
+  pname = "polyml";
+  version = "5.7.1";
+
+  prePatch = lib.optionalString stdenv.isDarwin ''
+    substituteInPlace configure.ac --replace stdc++ c++
+  '';
+
+  patches = [
+    ./5.7-new-libffi-FFI_SYSV.patch
+
+    # glibc 2.34 compat
+    (fetchpatch {
+      url = "https://src.fedoraproject.org/rpms/polyml/raw/4d8868ca5a1ce3268f212599a321f8011c950496/f/polyml-pthread-stack-min.patch";
+      sha256 = "1h5ihg2sxld9ymrl3f2mpnbn2242ka1fsa0h4gl9h90kndvg6kby";
+    })
+  ];
+
+  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 = "0j0wv3ijfrjkfngy7dswm4k1dchk3jak9chl5735dl8yrl8mq755";
+  };
+
+  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 ];
+  };
+}