Fix port to Debian GNU/kFreeBSD 7 (wheezy).

* process.c (accept4) [!HAVE_ACCEPT4]: New macro.

Fixes: debbugs:18666

src/ChangeLog

+2014-10-10  Paul Eggert  <eggert@cs.ucla.edu>
+
+	Fix port to Debian GNU/kFreeBSD 7 (wheezy) (Bug#18666).
+	* process.c (accept4) [!HAVE_ACCEPT4]: New macro.
+
 2014-10-09  Stefan Monnier  <monnier@iro.umontreal.ca>
 
 	* frame.c (Fmouse_pixel_position): Call Vmouse_position_function

src/process.c

@@ -173,6 +173,9 @@ close_on_exec (int fd)
   return fd;
 }
 
+# undef accept4
+# define accept4(sockfd, addr, addrlen, flags) \
+    process_accept4 (sockfd, addr, addrlen, flags)
 static int
 accept4 (int sockfd, struct sockaddr *addr, socklen_t *addrlen, int flags)
 {