diff --git a/cmake/MakeRootMap.cmake b/cmake/MakeRootMap.cmake
index 51007eb66e7f387464e6b713783087de3e6982d7..448d49ca2bf6a820c24f08e451efba3a1c906c44 100644
--- a/cmake/MakeRootMap.cmake
+++ b/cmake/MakeRootMap.cmake
@@ -6,7 +6,10 @@ else()
   SET ( ENV{LD_LIBRARY_PATH} ./:$ENV{LD_LIBRARY_PATH} )
 endif()
 
+MESSAGE( STATUS " *** MakeROOTMap.cmake run command : genmap -debug -i ${libname} -o ${rootmapfile}
+                 WORKING_DIRECTORY ${genmap_install_dir} "
+
 EXECUTE_PROCESS( COMMAND 
-		 genmap -i ${libname} -o ${rootmapfile}
+		 genmap -debug -i ${libname} -o ${rootmapfile}
                  WORKING_DIRECTORY ${genmap_install_dir}
 )