;;
* )
AC_CHECK_FUNC([clock_gettime], [], [AC_CHECK_LIB([rt], [clock_gettime], [], [AC_MSG_ERROR([could not find clock_gettime() in librt])])])
;;
* )
AC_CHECK_FUNC([clock_gettime], [], [AC_CHECK_LIB([rt], [clock_gettime], [], [AC_MSG_ERROR([could not find clock_gettime() in librt])])])