Attempt to fix for older versions of CMake still used in supported OSs.

cmake/ThirdPartyMPI.cmake

@@ -47,6 +47,8 @@ IF( NEKTAR_USE_MPI )
 	UNSET(HAVE_APRUN CACHE)
     ENDIF()
 
+    ADD_DEFINITIONS(-DNEKTAR_USE_MPI)
+
     IF (THIRDPARTY_BUILD_GSMPI)
         EXTERNALPROJECT_ADD(
             gsmpi-1.2

library/LibUtilities/CMakeLists.txt

@@ -411,7 +411,6 @@ ENDIF()
 # MPI
 IF( NEKTAR_USE_MPI )
     TARGET_LINK_LIBRARIES(LibUtilities LINK_PRIVATE ${GSMPI_LIBRARY} ${XXT_LIBRARY})
-    TARGET_COMPILE_DEFINITIONS(LibUtilities PUBLIC "-DNEKTAR_USE_MPI")
     IF (NOT MPI_BUILTIN)
         TARGET_LINK_LIBRARIES(LibUtilities LINK_PUBLIC ${MPI_LIBRARY} ${MPI_EXTRA_LIBRARY})
         SET_TARGET_PROPERTIES(LibUtilities

tests/CMakeLists.txt

@@ -53,6 +53,9 @@ IF( ${CMAKE_SYSTEM} MATCHES "Darwin-*")
     PROPERTIES LINK_FLAGS "-Wl,-undefined,dynamic_lookup -Wl,-rpath,${CMAKE_INSTALL_PREFIX}/${LIB_DIR} -Wl,-rpath,${Boost_LIBRARY_DIRS}")
 ENDIF( ${CMAKE_SYSTEM} MATCHES "Darwin-*")
 
+SET_TARGET_PROPERTIES(Tester
+    PROPERTIES COMPILE_FLAGS "-UNEKTAR_USE_MPI")
+
 INSTALL(TARGETS Tester
   RUNTIME DESTINATION ${NEKTAR_BIN_DIR} COMPONENT test OPTIONAL
   ARCHIVE DESTINATION ${NEKTAR_LIB_DIR} COMPONENT test OPTIONAL