message: Define HAVE_CXX_STDHEADERS to enable proper include statements on db_cxx.h
diff: @@ -137,6 +137,13 @@ list(APPEND CMAKE_MODULE_PATH "${CMAKE_CURRENT_SOURCE_DIR}")
  include(GetGitRevisionDescription)
  get_git_head_revision(GIT_REFSPEC CLIENT_VERSION_GIT_SHA1)
  +# ============================================================================================
  +message(STATUS "=== db4.8... ===================================================")
  +# The following flag is needed so that the inclusion
  +# of db_cxx.h into C++ files works; it leads to
  +# HAVE_CXX_STDHEADERS being defined in db_cxx.h.
  +add_definitions(-DHAVE_CXX_STDHEADERS)
  +
  # ============================================================================================
  message(STATUS "=== Dive into subdirs... ===================================================")
  add_subdirectory(src)
  