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/libraries/cmark/default.nix

@@ -0,0 +1,36 @@
+{ lib, stdenv, fetchFromGitHub, cmake }:
+
+stdenv.mkDerivation rec {
+  pname = "cmark";
+  version = "0.30.2";
+
+  src = fetchFromGitHub {
+    owner = "jgm";
+    repo = pname;
+    rev = version;
+    sha256 = "sha256-IkNybUe/XYwAvPowym3aqfVyvNdw2t/brRjhOrjVRpA=";
+  };
+
+  nativeBuildInputs = [ cmake ];
+
+  cmakeFlags = [
+    # Link the executable with the shared library
+    "-DCMARK_STATIC=OFF"
+  ];
+
+  doCheck = true;
+
+  preCheck = let
+    lib_path = if stdenv.isDarwin then "DYLD_FALLBACK_LIBRARY_PATH" else "LD_LIBRARY_PATH";
+  in ''
+    export ${lib_path}=$(readlink -f ./src)
+  '';
+
+  meta = with lib; {
+    description = "CommonMark parsing and rendering library and program in C";
+    homepage = "https://github.com/jgm/cmark";
+    maintainers = [ maintainers.michelk ];
+    platforms = platforms.unix;
+    license = licenses.bsd2;
+  };
+}