avoid 'command line is too long' error on windows

CMakeLists.txt

@@ -48,7 +48,7 @@ if(${CMAKE_VERSION} VERSION_LESS "3.9.0")
 else()
   include(CheckLanguage)
   check_language(CUDA)
-  if(CMAKE_CUDA_COMPILER)
+  if(CMAKE_CUDA_COMPILER AND ENABLE_CUDA)
     set(CUDA_ARCHITECTURES "Auto" CACHE STRING "\"Auto\" detects local machine GPU compute arch at runtime, \"Common\" and \"All\" cover common and entire subsets of architectures, \"Names\" is a list of architectures to enable by name, \"Numbers\" is a list of compute capabilities (version number) to enable")
     set_property(CACHE CUDA_ARCHITECTURES PROPERTY STRINGS "Auto" "Common" "All" "Kepler Maxwell Kepler+Tegra Maxwell+Tegra Pascal" "3.0 7.5")
     enable_language(CUDA)
@@ -65,7 +65,6 @@ else()
       endif()
     endif()
   else()
-    message(STATUS "Unable to find a CUDA compiler. Disabling CUDA support")
     set(ENABLE_CUDA "FALSE" CACHE BOOL "Enable CUDA support" FORCE)
   endif()
 endif()
@@ -83,6 +82,9 @@ if(MSVC)
 endif()
 if(ENABLE_OPENCV)
   find_package(OpenCV)
+  if(OpenCV_FOUND)
+    list(APPEND OpenCV_LINKED_COMPONENTS "opencv_video")
+  endif()
 endif()
 find_package(Stb REQUIRED)
 if(${CMAKE_VERSION} VERSION_LESS "3.11.0")
@@ -126,6 +128,8 @@ if(OpenCV_FOUND)
     set(SKIP_USELIB_TRACK "TRUE" CACHE BOOL "Skip building uselib_track" FORCE)
     message(STATUS "  ->  darknet is fine for now, but uselib_track has been disabled!")
     message(STATUS "  ->  Please rebuild OpenCV from sources with CUDA support to enable it")
+  else()
+    list(APPEND OpenCV_LINKED_COMPONENTS "opencv_cudaoptflow")
   endif()
 endif()
 
@@ -276,9 +280,9 @@ if(CUDNN_FOUND)
 endif()
 
 if(OpenCV_FOUND)
-  target_link_libraries(darknet PRIVATE ${OpenCV_LIBS})
-  target_link_libraries(uselib PRIVATE ${OpenCV_LIBS})
-  target_link_libraries(dark PRIVATE ${OpenCV_LIBS})
+  target_link_libraries(darknet PRIVATE ${OpenCV_LINKED_COMPONENTS})
+  target_link_libraries(uselib PRIVATE ${OpenCV_LINKED_COMPONENTS})
+  target_link_libraries(dark PRIVATE ${OpenCV_LINKED_COMPONENTS})
   target_compile_definitions(darknet PRIVATE -DOPENCV)
   target_compile_definitions(dark PUBLIC -DOPENCV)
 endif()
@@ -339,7 +343,7 @@ if(OpenCV_FOUND AND OpenCV_VERSION VERSION_GREATER "3.0" AND NOT SKIP_USELIB_TRA
   target_compile_definitions(uselib_track PRIVATE -DUSE_CMAKE_LIBS)
   #set_target_properties(uselib_track PROPERTIES LINKER_LANGUAGE CXX)
   target_include_directories(uselib_track PRIVATE ${CMAKE_CURRENT_LIST_DIR}/include)
-  target_link_libraries(uselib_track PRIVATE ${OpenCV_LIBS})
+  target_link_libraries(uselib_track PRIVATE ${OpenCV_LINKED_COMPONENTS})
   if(ENABLE_ZED_CAMERA)
     target_link_libraries(uselib_track PRIVATE ${ZED_LIBRARIES})
     target_compile_definitions(uselib_track PRIVATE -DZED_STEREO)