3.4: Support of OpenVINO interface libraries

original commit: c703f1eed6

CMakeLists.txt

@@ -1528,6 +1528,7 @@ if(WITH_INF_ENGINE OR INF_ENGINE_TARGET)
   if(INF_ENGINE_TARGET)
     list(GET INF_ENGINE_TARGET 0 ie_target)
     set(__msg "YES (${INF_ENGINE_RELEASE} / ${INF_ENGINE_VERSION})")
+    ocv_get_imported_target(ie_target "${ie_target}")
     get_target_property(_lib ${ie_target} IMPORTED_LOCATION)
     get_target_property(_lib_imp_rel ${ie_target} IMPORTED_IMPLIB_RELEASE)
     get_target_property(_lib_imp_dbg ${ie_target} IMPORTED_IMPLIB_DEBUG)
@@ -1551,7 +1552,7 @@ if(WITH_INF_ENGINE OR INF_ENGINE_TARGET)
 endif()
 if(WITH_NGRAPH OR HAVE_NGRAPH)
   if(HAVE_NGRAPH)
-    set(__target ngraph::ngraph)
+    ocv_get_imported_target(__target ngraph::ngraph)
     set(__msg "YES (${ngraph_VERSION})")
     get_target_property(_lib ${__target} IMPORTED_LOCATION)
     get_target_property(_lib_imp_rel ${__target} IMPORTED_IMPLIB_RELEASE)

cmake/OpenCVUtils.cmake

@@ -1580,6 +1580,19 @@ function(ocv_add_library target)
 endfunction()
 
 
+# Returns the first non-interface target
+function(ocv_get_imported_target imported interface)
+  set(__result "${interface}")
+  get_target_property(__type "${__result}" TYPE)
+  if(__type STREQUAL "INTERFACE_LIBRARY")
+    get_target_property(__libs "${__result}" INTERFACE_LINK_LIBRARIES)
+    list(GET __libs 0 __interface)
+    ocv_get_imported_target(__result "${__interface}")
+  endif()
+  set(${imported} "${__result}" PARENT_SCOPE)
+endfunction()
+
+
 macro(ocv_get_libname var_name)
   get_filename_component(__libname "${ARGN}" NAME)
   # libopencv_core.so.3.3 -> opencv_core