@item
This header file is not self-contained on some platforms: it requires
@code{<sys/types.h>} to be included first.
+@item
+This header file is lacking the @code{SHUT_RD}, @code{SHUT_WR},
+@code{SHUT_RDWR} macros on some platforms, despite having the @code{shutdown}
+functions:
+emx+gcc.
@end itemize
Portability problems not fixed by Gnulib: