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10.1305 wcsstr

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

Gnulib module: wcsstr or wcsstr-simple

Portability problems fixed by either Gnulib module wcsstr-simple or wcsstr:

• This function is missing on some platforms: HP-UX 11.00.

Portability problems fixed by Gnulib module wcsstr:

• This function has quadratic instead of linear worst-case complexity on some platforms: glibc 2.39, macOS 14, FreeBSD 13.1, NetBSD 10.0, OpenBSD 7.2, AIX 7.2, HP-UX 11, Solaris 11.4, Cygwin 2.9.0, mingw, MSVC 14.

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.