use built-in find icu module

CMakeLists.txt

@@ -247,16 +247,15 @@ IF(WITH_STATIC)
     ENDIF()
 
     # under Linux and OS X, recent libxml2 versions are linked against libicu
-    # FIND_PACKAGE(Icu)
-    FIND_LIBRARY(ICU_LIBRARY icuuc)
-    IF(ICU_LIBRARY)
-       FIND_LIBRARY(ICU_DATA_LIBRARY icudata)
-       IF(ICU_LIBRARY)
-         MESSAGE(STATUS "ICU UC was found: ${ICU_LIBRARY}")
-       ELSE()
-         MESSAGE(STATUS "ICU UC was NOT found")
-       ENDIF()
-       SET(LIBXML2_LIBRARIES ${LIBXML2_LIBRARIES} ${ICU_DATA_LIBRARY} ${ICU_LIBRARY})
+    FIND_PACKAGE(ICU COMPONENTS data uc)
+    IF(ICU_FOUND)
+      IF(ICU_UC_FOUND)
+        MESSAGE(STATUS "ICU uc was found: ${ICU_LIBRARIES}")
+      ENDIF()
+      IF(ICU_DATA_FOUND)
+        MESSAGE(STATUS "ICU data was found: ${ICU_LIBRARIES}")
+      ENDIF()
+      SET(LIBXML2_LIBRARIES ${LIBXML2_LIBRARIES} ICU::data ICU::uc)
     ENDIF()
 
   ENDIF()