step-45 requires MPI and Trilinos

diff --git a/examples/step-45/CMakeLists.txt b/examples/step-45/CMakeLists.txt
index 4ad8df9fad043448997684039a6fec30346bcea0..8a525dda7ac6cb9ada7a28e5d0aeed8fb1d9d6f6 100644 (file)
--- a/examples/step-45/CMakeLists.txt
+++ b/examples/step-45/CMakeLists.txt
@@ -34,6 +34,21 @@ IF(NOT ${deal.II_FOUND})
     )
 ENDIF()
 
+#
+# Are all dependencies fulfilled?
+#
+IF( NOT DEAL_II_WITH_MPI OR
+    NOT DEAL_II_WITH_P4EST OR
+    NOT DEAL_II_WITH_TRILINOS )
+  MESSAGE(FATAL_ERROR "
+Error! The deal.II library found at ${DEAL_II_PATH} was not configured with
+    DEAL_II_WITH_MPI = ON
+    DEAL_II_WITH_P4EST = ON
+    DEAL_II_WITH_TRILINOS = ON
+One or all of these are OFF in your installation but are required for this tutorial step."
+    )
+ENDIF()
+
 DEAL_II_INITIALIZE_CACHED_VARIABLES()
 PROJECT(${TARGET})
 DEAL_II_INVOKE_AUTOPILOT()