message: check ctags when configure
diff: @@ -289,9 +289,18 @@ AC_MSG_NOTICE([checking required package dependencies])
  AC_PATH_PROG([PKG_CONFIG],[pkg-config])
  +# Check if ctags is present.
  +
  +AC_MSG_CHECKING([checking if Exuberant Ctags is available])
  +AC_PATH_PROGS_FEATURE_CHECK([CTAGS], [ctags],
  + [$ac_path_CTAGS --version | grep -q Exuberant &&
  + ac_cv_path_CTAGS=$ac_path_CTAGS],
  + [AC_MSG_ERROR([could not find ctags])])
  +AC_MSG_RESULT([$ac_cv_path_CTAGS])
  +
  # Check if the DBus module
  -PKG_CHECK_MODULES(DBUS, [dbus-1 >= 1.4], , [AC_MSG_ERROR([could not found dbus(>= 1.4)])])
  +PKG_CHECK_MODULES(DBUS, [dbus-1 >= 1.4], , [AC_MSG_ERROR([could not find dbus(>= 1.4)])])
  AC_SUBST(DBUS_CFLAGS)
  AC_SUBST(DBUS_LIBS)
  