WCHAR_UNSIGNED

[Joseph S. Myers]

WCHAR_UNSIGNED is an undocumented target macro, defined for many targets
(I don't know whether correctly or not), with a default in defaults.h, and
not used.

It would be natural simply to remove this unused macro.  However, is this
correct?  Is the macro intended to be used by the preprocessor, to
determine whether wide character constants have a signed or unsigned type?

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