[Bug #438050] Check for sys/poll.h in configure script

config.h.in

-/* config.h.in.  Generated automatically from configure.in by autoheader 2.13.  */
+/* config.h.in.  Generated automatically from configure.in by autoheader.  */
 
 /* Define if on AIX 3.
    System headers sometimes define this.
@@ -644,6 +644,9 @@
 /* Define if you have the <sys/param.h> header file.  */
 #undef HAVE_SYS_PARAM_H
 
+/* Define if you have the <sys/poll.h> header file.  */
+#undef HAVE_SYS_POLL_H
+
 /* Define if you have the <sys/resource.h> header file.  */
 #undef HAVE_SYS_RESOURCE_H
 

configure.in

@@ -543,7 +543,7 @@ AC_HEADER_STDC
 AC_CHECK_HEADERS(dlfcn.h fcntl.h limits.h locale.h ncurses.h poll.h pthread.h \
 signal.h stdarg.h stddef.h stdlib.h thread.h unistd.h utime.h termios.h \
 sys/audioio.h sys/file.h sys/lock.h sys/modem.h db_185.h db.h \
-sys/param.h sys/select.h sys/socket.h sys/time.h sys/times.h \
+sys/param.h sys/poll.h sys/select.h sys/socket.h sys/time.h sys/times.h \
 sys/un.h sys/utsname.h sys/wait.h pty.h libutil.h \
 ndbm.h db1/ndbm.h gdbm/ndbm.h sys/resource.h)
 AC_HEADER_DIRENT