[PATCH 2/5] Remove __need macros from stdio.h and wchar.h.

[Joseph Myers]

On Thu, 8 Jun 2017, Zack Weinberg wrote:

> Note that I don't expect anyone to *want* to include sys/uio_ext.h
> directly; its purpose is separation of concerns when writing new
> ports.

If you don't expect people to want to include it directly, to me that 
indicates making it a bits/ header rather than a public API one.

-- 
Joseph S. Myers
joseph@codesourcery.com