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/librealsense/default.nix

@@ -0,0 +1,78 @@
+{ stdenv
+, config
+, lib
+, fetchFromGitHub
+, fetchpatch
+, cmake
+, libusb1
+, ninja
+, pkg-config
+, gcc
+, cudaSupport ? config.cudaSupport or false, cudaPackages ? {}
+, enablePython ? false, pythonPackages ? null
+}:
+
+assert cudaSupport -> (cudaPackages?cudatoolkit && cudaPackages.cudatoolkit != null);
+assert enablePython -> pythonPackages != null;
+
+stdenv.mkDerivation rec {
+  pname = "librealsense";
+  version = "2.45.0";
+
+  outputs = [ "out" "dev" ];
+
+  src = fetchFromGitHub {
+    owner = "IntelRealSense";
+    repo = pname;
+    rev = "v${version}";
+    sha256 = "0aqf48zl7825v7x8c3x5w4d17m4qq377f1mn6xyqzf9b0dnk4i1j";
+  };
+
+  buildInputs = [
+    libusb1
+    gcc.cc.lib
+  ] ++ lib.optional cudaSupport cudaPackages.cudatoolkit
+    ++ lib.optionals enablePython (with pythonPackages; [python pybind11 ]);
+
+  patches = [
+    # fix build on aarch64-darwin
+    # https://github.com/IntelRealSense/librealsense/pull/9253
+    (fetchpatch {
+      url = "https://github.com/IntelRealSense/librealsense/commit/beb4c44debc8336de991c983274cad841eb5c323.patch";
+      sha256 = "05mxsd2pz3xrvywdqyxkwdvxx8hjfxzcgl51897avz4v2j89pyq8";
+    })
+    ./py_sitepackage_dir.patch
+    ./py_pybind11_no_external_download.patch
+  ];
+
+  nativeBuildInputs = [
+    cmake
+    ninja
+    pkg-config
+  ];
+
+  cmakeFlags = [
+    "-DBUILD_EXAMPLES=ON"
+    "-DBUILD_GRAPHICAL_EXAMPLES=OFF"
+    "-DBUILD_GLSL_EXTENSIONS=OFF"
+  ] ++ lib.optionals enablePython [
+    "-DBUILD_PYTHON_BINDINGS:bool=true"
+    "-DXXNIX_PYTHON_SITEPACKAGES=${placeholder "out"}/${pythonPackages.python.sitePackages}"
+  ] ++ lib.optional cudaSupport "-DBUILD_WITH_CUDA:bool=true";
+
+  # ensure python package contains its __init__.py. for some reason the install
+  # script does not do this, and it's questionable if intel knows it should be
+  # done
+  # ( https://github.com/IntelRealSense/meta-intel-realsense/issues/20 )
+  postInstall = lib.optionalString enablePython  ''
+    cp ../wrappers/python/pyrealsense2/__init__.py $out/${pythonPackages.python.sitePackages}/pyrealsense2
+  '';
+
+  meta = with lib; {
+    description = "A cross-platform library for Intel® RealSense™ depth cameras (D400 series and the SR300)";
+    homepage = "https://github.com/IntelRealSense/librealsense";
+    license = licenses.asl20;
+    maintainers = with maintainers; [ brian-dawn ];
+    platforms = platforms.unix;
+  };
+}