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10.444 iconv_close

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

Gnulib module: iconv

Portability problems fixed by Gnulib:

• GNU libiconv is not found if installed in $PREFIX/lib.

Portability problems not fixed by Gnulib:

• This function is missing on some platforms: macOS 11.1, FreeBSD 6.0, OpenBSD 6.7, Minix 3.1.8, Cygwin 2.9, mingw, MSVC 14, Android 8.1, when GNU libiconv is not installed.