@itemize
@item
This macro is missing on some platforms:
-AIX 4.3.2, IRIX 6.5, OSF/1 5.1, Solaris 11 2010-11.
+AIX 5.1, IRIX 6.5, OSF/1 5.1, Solaris 11 2010-11.
+@item
+This macro incorrectly yields true for some @samp{long double} arguments, on
+some platforms:
+OpenBSD 4.9/x86 (pseudo-Infinity).
@end itemize
Portability problems not fixed by Gnulib: