5 POSIX specification:@* @url{http://www.opengroup.org/onlinepubs/9699919799/functions/isinf.html}
9 Portability problems fixed by Gnulib:
12 This macro is missing on some platforms:
13 AIX 5.1, IRIX 6.5, OSF/1 5.1, Solaris 11 2011-11.
15 This macro incorrectly yields true for some @samp{long double} arguments, on
17 OpenBSD 4.9/x86 (pseudo-Infinity).
20 Portability problems not fixed by Gnulib: