@itemize
@item
This function is missing on some platforms:
-AIX 4.3.2, HP-UX 11, IRIX 6.5, OSF/1 5.1, mingw.
+Minix 3.1.8, AIX 4.3.2, HP-UX 11, IRIX 6.5, OSF/1 5.1, mingw, MSVC 9.
@item
This function does not return a string for out-of-range numbers on
some platforms:
Solaris, AIX 5.1.
+
+@item
+This function is declared in @code{unistd.h} instead of
+@code{string.h} on some platforms:
+NetBSD 5.0.
@end itemize
Portability problems not fixed by Gnulib: