NetBSD 3.0.
@item
This function does not work on negative zero on some platforms:
-NetBSD 4.99.
+NetBSD 4.99, MSVC 9.
@item
This function does not work on infinite numbers on some platforms:
-IRIX 6.5, mingw.
+IRIX 6.5, mingw, MSVC 9.
@end itemize
Portability problems not fixed by Gnulib: