I have recently used BOOST_NO_NUMERIC_LIMITS_LOWEST to act as a proxy for support of numeric_limits<T>:: max_digits10 (as correctly suggested by John Maddock). Do we need yet another new macro for this, say BOOST_NO_NUMERIC_LIMITS_MAX_DIGITS10 or continue to use BOOST_NO_NUMERIC_LIMITS_LOWEST as a proxy. I think the latter will suffice (despite its unfortunate name for this task). But I think an addition to the configuration macro reference docs would be useful. Perhaps in macro_reference.qbk [[`BOOST_NO_NUMERIC_LIMITS_LOWEST`][Standard library][ Static function `numeric_limits<T>::lowest()` is not available for use. Also acts as a proxy for static const int `numeric_limits<T>:: max_digits10;` is not available for use. ]] I suspect there are also other additions that went with these two items, but I'm having a senior moment about what they are ;-( Views? Paul --- Paul A. Bristow, Prizet Farmhouse, Kendal LA8 8AB UK +44 1539 561830 07714330204 pbristow@hetp.u-net.com