V3 PATCH: numeric_limits<> support, fix PR/3865

[Joseph S. Myers]

On Thu, 29 Aug 2002, Neil Booth wrote:

> I just worry about the vast number of new macros you're defining.  Are
> they going to be enabled only for C++ so C doesn't have to carry the
> baggage?  Are they really necessary (e.g. how does Dinkumware handle
> it since they don't control a compiler)?

Also, the _BITS__ macros for integer types are redundant with the _MAX__ 
macros used for <limits.h>; one can be derived from the other.

-- 
Joseph S. Myers
jsm28@cam.ac.uk