attempt MACPORTS OpenCV4 build. weird lade and with opencv_contrib also...

attempt MACPORTS OpenCV4 build. weird lade and with opencv_contrib also openjpeg dependencies dragged in by OpenCV4. still doesn't link the OpenCV API properly

doc/BUILD.md

@@ -13,7 +13,8 @@ Using ccache to speed up recompilation is recommended, but not required, on Linu
 sudo port install CMake bison doxygen yasm ninja ccache
 
 # Libraries
-sudo port install opencv glew gsed jpeg libpng \
+sudo port install opencv4 +nonfree +opencv_contrib +openmp \
+                  glew gsed jpeg libpng \
                   tiff faac faad2 ceres-solver glfw glm OpenEXR \
                   ffmpeg +gpl2 +librtmp +nonfree
 ```

lib/CMakeLists.txt

@@ -692,6 +692,11 @@ endif()
 # Calibration && AutoCrop && CameraAmbisonics
 # ----------------------------------------------------------------------------
 find_package(OpenCV REQUIRED)
+if(MACPORTS AND (OpenCV_VERSION GREATER_EQUAL 4))
+  find_package(ade REQUIRED)
+  find_package(openjpeg REQUIRED)
+  # set(OpenCV_LIBRARIES ${OpenCV_LIBRARIES} ${ADE_LIBRARIES})
+endif()
 
 add_subdirectory(src/calibration)
 add_subdirectory(src/autocrop)