@node isinf @section @code{isinf} @findex isinf POSIX specification:@* @url{http://www.opengroup.org/onlinepubs/9699919799/functions/isinf.html} Gnulib module: isinf Portability problems fixed by Gnulib: @itemize @item This macro is missing on some platforms: AIX 5.1, IRIX 6.5, OSF/1 5.1, Solaris 11.4. @end itemize Portability problems not fixed by Gnulib: @itemize @item This macro returns an unspecified result when given noncanonical values such as unnormalized numbers, pseudo-denormals, pseudo-NaNs, pseudo-Infinities, and pseudo-zeroes. @end itemize