AC_SEARCH_LIBS([dlopen], [dl],
[test "$ac_cv_search_dlopen" = "none required" || LIBS_DL=$ac_cv_search_dlopen],
AC_MSG_ERROR($msg_dl_missing))
AC_SEARCH_LIBS([dlopen], [dl],
[test "$ac_cv_search_dlopen" = "none required" || LIBS_DL=$ac_cv_search_dlopen],
AC_MSG_ERROR($msg_dl_missing))