[Bug libc/20639] Inconsistency in definitions of fputwc(), putwc() and putwchar() in glibc

[joseph at codesourcery dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=20639

--- Comment #4 from joseph at codesourcery dot com <joseph at codesourcery dot com> ---
You can't change existing definitions of typedefs such as wint_t without 
breaking ABI compatibility (even when you have the same size and 
signedness and so are ABI-compatible for C, changing the underlying type 
breaks compatibility for C++ mangling).

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