doc: Mention reason for replacement on glibc/Linux systems. * doc/posix-functions/dprintf.texi: Mention the problem with special 'long double' values. * doc/posix-functions/fprintf.texi: Likewise. * doc/posix-functions/printf.texi: Likewise. * doc/posix-functions/snprintf.texi: Likewise. * doc/posix-functions/sprintf.texi: Likewise. * doc/posix-functions/vdprintf.texi: Likewise. * doc/posix-functions/vfprintf.texi: Likewise. * doc/posix-functions/vprintf.texi: Likewise. * doc/posix-functions/vsnprintf.texi: Likewise. * doc/posix-functions/vsprintf.texi: Likewise. * doc/posix-functions/fcntl.texi: Add glibc/Linux to the list of platforms with F_DUPFD_CLOEXEC problems. * doc/posix-functions/glob.texi: Mention which platforms are affected by the problem with symbolic links. * doc/posix-functions/linkat.texi: Mention the problem with AT_SYMLINK_FOLLOW on Linux.

@node inet_ntoa
@section @code{inet_ntoa}
@findex inet_ntoa

POSIX specification:@* @url{http://www.opengroup.org/onlinepubs/9699919799/functions/inet_ntoa.html}

Gnulib module: ---

Portability problems fixed by Gnulib:
@itemize
@end itemize

Portability problems not fixed by Gnulib:
@itemize
@item
This function is missing on some platforms:
mingw, MSVC 9.
@item
The @code{inet_ntoa} function need not be reentrant, and consequently
is not required to be thread safe.  Implementations of
@code{inet_ntoa} typically write the time stamp into static buffer.
If two threads call @code{inet_ntoa} at roughly the same time, you
might end up with the wrong date in one of the threads, or some
undefined string.
@end itemize

Note: @code{inet_ntoa} is specific for @acronym{IPv4} addresses.
A protocol independent function is @code{inet_ntop}.