2 @subsection @code{isnanf}
9 @ref{Floating Point Classes,,Floating-Point Number Classification Functions,libc},
12 @url{https://www.gnu.org/software/libc/manual/html_node/Floating-Point-Classes.html},
15 @uref{https://www.kernel.org/doc/man-pages/online/pages/man3/isnanf.3.html,,man isnanf}.
20 Portability problems fixed by Gnulib:
23 This function is missing on some platforms:
24 Mac OS X 10.5, Minix 3.1.8, AIX 5.1, HP-UX 11, MSVC 14.
27 Portability problems not fixed by Gnulib: