@node login_tty
@subsection @code{login_tty}
@findex login_tty

Gnulib module: login_tty

Portability problems fixed by Gnulib:
@itemize
@item
This function is missing on some platforms:
AIX 5.1, HP-UX 11, IRIX 6.5, Solaris 10.
@item
This function requires linking with @code{-lutil} on some platforms:
glibc 2.3.6, FreeBSD 6.0, NetBSD 3.0, OpenBSD 3.8.
It is available without link options on other platforms:
MacOS X 10.3, OSF/1 5.1, Cygwin, Interix 3.5.
@end itemize

Portability problems not fixed by Gnulib:
@itemize
@item
This function is missing on some platforms:
mingw.
@item
This function is declared in @code{<utmp.h>} on glibc, Cygwin,
in @code{<util.h>} on MacOS X 10.3, NetBSD 3.0, OpenBSD 3.8,
in @code{<libutil.h>} on FreeBSD 6.0, Haiku, and not declared at all
on OSF/1 5.1, Interix 3.5.
@end itemize