@node signbit @section @code{signbit} @findex signbit POSIX specification: @url{http://www.opengroup.org/onlinepubs/9699919799/functions/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