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10.209 duplocale

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

Gnulib module: duplocale

Portability problems fixed by Gnulib:

• The argument LC_GLOBAL_LOCALE is not supported on some platforms: glibc 2.11, AIX 7.1.
• With the argument LC_GLOBAL_LOCALE, this function returns a wrong result on some platforms: NetBSD 7.1.

Portability problems not fixed by Gnulib:

• This function is missing on many platforms: FreeBSD 9.0, NetBSD 5.0, OpenBSD 6.1, Minix 3.1.8, AIX 6.1, HP-UX 11, Solaris 11.3, Cygwin 2.5.x, mingw, MSVC 14, Android 4.4.
• This function is useless because the locale_t type is not defined on some platforms: z/OS.
• With the argument LC_GLOBAL_LOCALE, this function returns a wrong result on some platforms: Haiku.