Silence CMake warning regarding CMP0046

Re ECFLOW-1936

Viewer/CMakeLists.txt

@@ -8,20 +8,5 @@
 # nor does it submit to any jurisdiction.
 #
 
-# avoid warning about dependency targets that don't exist
-#
-# CMake Warning (dev) at Viewer/src/CMakeLists.txt:261 (ADD_DEPENDENCIES):
-#  Policy CMP0046 is not set: Error on non-existent dependency in
-#  add_dependencies.  Run "cmake --help-policy CMP0046" for policy details.
-#  Use the cmake_policy command to set the policy and suppress this warning.
-#
-#  The dependency target
-#  "/tmp/ma0/workspace/ecflow/Viewer/src/../images/zombie_dock.svg" of target
-#  "Qt_resource_cpp" does not exist.
-
-if (POLICY CMP0046)
-  cmake_policy(SET CMP0046 OLD)
-endif()
-
 add_subdirectory( libViewer)
 add_subdirectory( ecflowUI)

Viewer/ecflowUI/src/CMakeLists.txt

@@ -795,8 +795,7 @@ endif()
 # add all the images as dependencies of the resource file so that it is
 # automatically recompiled when an image changes
 file(GLOB image_files "${CMAKE_CURRENT_SOURCE_DIR}/../images/*.*")
-add_custom_target(Qt_resource_cpp DEPENDS ${VIEWER_RES})
-add_dependencies(Qt_resource_cpp ${image_files})
+add_custom_target(Qt_resource_cpp DEPENDS ${VIEWER_RES} ${image_files})
 
 ecbuild_add_executable(
   TARGET