[PATCH] error, warn, warnx: Use __fxprintf for wide printing [BZ #23519]

[Joseph Myers]

On Tue, 14 Aug 2018, Gabriel F. T. Gomes wrote:

> Just out of curiosity, how do we know that other programs use this code
> outside of glibc?  (assuming this is the reason for the _LIBC check).

Not only is it used in gnulib, but we have at least two open bugs for 
issues that only apply for such use outside glibc (10412, 17089).

-- 
Joseph S. Myers
joseph@codesourcery.com