@item
This function is missing on some platforms:
Minix 3.1.8, Cygwin, mingw, MSVC 9, Interix 3.5, BeOS.
+Note that the Gnulib replacement may fail with ENOSYS on some platforms.
@item
This function is not declared on some platforms:
AIX 7.1, OSF/1 5.1, Solaris 10.
On Solaris 10, the first argument is @code{char *} instead of
@code{const char *} and the second parameter is @code{int} instead of
@code{size_t}.
-@item
-On some platforms the Gnulib replacement always fails with ENOSYS.
@end itemize
Portability problems not fixed by Gnulib: