CONFIG: cmake targets are globally unique

src/catalyst/CMakeLists-Catalyst.txt

 #------------------------------------------------------------------------------
+project(catalyst)
 
 include(${PARAVIEW_USE_FILE})
 

src/catalyst/CMakeLists.txt

 #------------------------------------------------------------------------------
 cmake_minimum_required(VERSION 2.8)
+cmake_policy(SET CMP0002 NEW)   # Policy CMP0002 required for for cmake >= 3
 
-# Fail immediately if not using an out-of-source build
+# Fail if not building out-of-source
 if (CMAKE_CURRENT_SOURCE_DIR STREQUAL CMAKE_CURRENT_BINARY_DIR)
     message(FATAL_ERROR
-        "In-source builds are not supported.  Please create a build directory "
-        "separate from the source directory")
+        "In-source builds disallowed. Use a separate build directory")
 endif()
 
-project(catalyst)
-
-# Set policy for CMP0002 needed for cmake > 3
-cmake_policy(SET CMP0002 OLD)
-
-
 include(CMakeLists-OpenFOAM.txt)
 
 #------------------------------------------------------------------------------