> BTW, my 1.5.2 borrows wctype.h from the XPG4DL[1] source. Besides, I
> once attempted to port XPG4DL stuffs including wc*/mb* functions back
> to 1.5.2 several months ago, but gave up mainly because of lack of my
> knowledge. I think of a patch which extends only locale related things
> for 1.5.x as very useful for many people, but how much it's worth
> depends on how long it takes that the 1.6 release will come.

Reference missing...

[1] http://citrus.bsdclub.org/xpg4dl/

Regards,
Masao