message: If db_cxx.h was found, add it to known sources
diff: @@ -162,6 +162,15 @@ target_sources(spectrecoin_lib
  ${CMAKE_CURRENT_LIST_DIR}/shutdown.cpp
  )
  +if (EXISTS ${BERKELEYDB_INCLUDE_PATH}/db_cxx.h)
  + target_sources(spectrecoin_lib
  + PUBLIC
  + ${BERKELEYDB_INCLUDE_PATH}/db_cxx.h
  + )
  +else()
  + message(WARNING "${BERKELEYDB_INCLUDE_PATH}/db_cxx.h not found. Please re-run cmake after BerkeleyDB was build.")
  +endif()
  +
  add_subdirectory(json)
  add_subdirectory(lz4)
  add_subdirectory(wordlists)
  