@node iconv
@section @code{iconv}
@findex iconv

POSIX specification:@* @url{https://pubs.opengroup.org/onlinepubs/9699919799/functions/iconv.html}

Gnulib module: iconv

Portability problems fixed by Gnulib:
@itemize
@item
GNU libiconv is not found if installed in @file{$PREFIX/lib}.
@end itemize

Portability problems handled by Gnulib
(in the sense that @code{HAVE_ICONV} does not get defined if the system's
@code{iconv} function has this problem):
@itemize
@item
Failures are not distinguishable from successful returns on some platforms:
AIX 5.1..7.2, Solaris 10.
@item
A buffer overrun can occur on some platforms:
AIX 6.1..7.1.
@end itemize

Portability problems not fixed by Gnulib:
@itemize
@item
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.
@item
This function was not correctly implemented in glibc versions before 2.2.
@item
When @code{iconv} encounters an input character that is valid but that
cannot be converted to the output character set, glibc's and GNU libiconv's
@code{iconv} stop the conversion.  Some other implementations put an
implementation-defined character into the output buffer.
Gnulib provides higher-level facilities @code{striconv} and @code{striconveh}
(wrappers around @code{iconv}) that deal with conversion errors in a platform
independent way.
@item
This function returns a positive return value, instead of zero, when
converting from ISO-8859-1 to UTF-8 on HP-UX 11.
@end itemize