@node signbit
@section @code{signbit}
@findex signbit

POSIX specification: @url{http://www.opengroup.org/susv3xsh/signbit.html}

Gnulib module: signbit

Portability problems fixed by Gnulib:
@itemize
@item
This function is missing on some platforms:
MacOS X 10.3, OpenBSD 3.8, AIX 5.1, IRIX 6.5, OSF/1 5.1, Solaris 10, Interix 3.5.
@end itemize

Portability problems not fixed by Gnulib:
@itemize
@end itemize