2 @section @code{signbit}
5 POSIX specification:@* @url{http://www.opengroup.org/onlinepubs/9699919799/functions/signbit.html}
9 Portability problems fixed by Gnulib:
12 This function is missing on some platforms:
13 MacOS X 10.5, OpenBSD 3.8, AIX 5.1, IRIX 6.5, OSF/1 5.1, Solaris 11 2010-11, Interix 3.5.
16 Portability problems not fixed by Gnulib: