From 5b3d5f9f3c3c96f0f0f602983661d012a4a447c1 Mon Sep 17 00:00:00 2001
From: Ilya Lavrenov <ilya.lavrenov@intel.com>
Date: Thu, 9 Sep 2021 10:56:34 +0300
Subject: [PATCH] 3.4: Support of OpenVINO interface libraries

original commit: c703f1eed6c3da4f14b37cc151e03463bb4ff54f
---
 CMakeLists.txt          |  3 ++-
 cmake/OpenCVUtils.cmake | 13 +++++++++++++
 2 files changed, 15 insertions(+), 1 deletion(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index ba2d477501..617d9dd468 100644
--- a/CMakeLists.txt
+++ b/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)
diff --git a/cmake/OpenCVUtils.cmake b/cmake/OpenCVUtils.cmake
index 1e0ea947ef..9f23abe9f7 100644
--- a/cmake/OpenCVUtils.cmake
+++ b/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