Merge pull request opencv#2390 from nicolasmartin3d:master_bug3546

Author: vpisarev

cmake/OpenCVFindLibsGUI.cmake

@@ -69,7 +69,7 @@ endif(WITH_OPENGL)
 if(APPLE)
   if(WITH_CARBON)
     set(HAVE_CARBON YES)
-  elseif(NOT IOS)
+  elseif(NOT IOS AND CMAKE_COMPILER_IS_CLANGCXX)
     set(HAVE_COCOA YES)
   endif()
 endif()

cmake/OpenCVFindLibsVideo.cmake

@@ -273,7 +273,7 @@ endif()
 if (NOT IOS)
   if(WITH_QUICKTIME)
     set(HAVE_QUICKTIME YES)
-  elseif(APPLE)
+  elseif(APPLE AND CMAKE_COMPILER_IS_CLANGCXX)
     set(HAVE_QTKIT YES)
   endif()
 endif()