LONG_BIT and WORD_BIT

[Joel Sherrill]

Hi

Linux and FreeBSD define LONG_BIT and WORD_BIT which are "CX"
category. Newlib doesn't so I would like to discuss how to add them.

http://pubs.opengroup.org/onlinepubs/9699919799/basedefs/limits.h.html

FreeBSD has them guarded like this in sys/types.h:

#if __XSI_VISIBLE || __POSIX_VISIBLE >= 200809
#define LONG_BIT        __LONG_BIT
#define WORD_BIT        __WORD_BIT
#endif


glibc has them in xopen_lim.h with a number of other constants.
The include of that file has guards like this in limits.h:

#ifdef  __USE_XOPEN
# include <bits/xopen_lim.h>
#endif

How do folks feel about adding these? If so, what should they
be derived from and where should they be placed?

Thanks.

--joel