on some platforms:
HP-UX 11.
@item
-This function has an incompatible declaration on some platforms:
-Solaris 11 2011-11 (when @code{_POSIX_PTHREAD_SEMANTICS} is not defined).
-@item
This function returns a truncated result, instead of failing with error code
@code{ERANGE}, when the buffer is not large enough, on some platforms:
OSF/1 5.1.
Portability problems not fixed by Gnulib:
@itemize
@item
+This function has an incompatible declaration on some platforms:
+Solaris 11 2011-11 (when @code{_POSIX_PTHREAD_SEMANTICS} is not defined).
+@item
This function fails even when standard input is a tty on some platforms:
HP-UX 11.11.
@item