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10.1284 wcscat

POSIX specification:
https://pubs.opengroup.org/onlinepubs/9699919799/functions/wcscat.html

Gnulib module: wcscat

Portability problems fixed by Gnulib:

Portability problems not fixed by Gnulib:

• On Windows and 32-bit AIX platforms, wchar_t is a 16-bit type and therefore cannot accommodate all Unicode characters.