[PATCH v2 4/5] termios: _SPEED_MAX and _BAUD_MAX constants

[Collin Funk]

"H. Peter Anvin" <hpa@zytor.com> writes:

> Add constants indicating the maximum values of speed_t and baud_t.
> Hopefully if and when the baud_t interface is standardized then
> _BAUD_MAX will be included in the standardization from the start.
>
> Historically, the __MAX_BAUD symbol has indicated the maximum speed_t
> value on at least some platforms (including glibc).  However, this
> name would be problematic for future standardization, because it
> would imply a reference to baud_t, not speed_t, and it is inconsistent
> with other limit symbols, which are all of the form *_MAX
> (e.g. SIZE_MAX for size_t), but add an underscore to the front to
> avoid stomping on the application namespace.
>
> Furthermore, move __MAX_BAUD under __USE_MISC as it is not a
> standardized symbol.

If the goal is to standardized baud_t and _BAUD_MAX, wouldn't it make
sense to just add BAUD_MAX now under __USE_MISC/__USE_GNU?

I doubt the name with the leading underscore would ever be standardized.
And it looks much nicer without, in my opinion.

Collin