case $host_os in
darwin* )
AC_CHECK_FUNC([clock_get_time], [], [AC_MSG_ERROR([could not find clock_get_time()])])
+ CFLAGS+=" -Wno-deprecated-declarations"
;;
* )
AC_CHECK_FUNC([clock_gettime], [], [AC_CHECK_LIB([rt], [clock_gettime], [], [AC_MSG_ERROR([could not find clock_gettime() in librt])])])