.SH "CONFORMING TO"
These functions are nonstandard and not portable.
The function
-.IR fpurge ()
+.BR fpurge ()
was introduced in 4.4BSD and is not available under Linux.
The function
-.IR __fpurge ()
+.BR __fpurge ()
was introduced in Solaris, and is present in glibc 2.1.95 and later.
.SH NOTES
Usually it is a mistake to want to discard input buffers.