============ linker error =================

linking kernel
if_ural.o(.text+0×713): In function `ural_free_tx_list':
: undefined reference to `ieee80211_free_node'

`rum' is a wireless NIC driver.  You need `wlan' options to compile into
the kernel.
以上是我在Freebsd7.0 正式版内核编译出现的错误的，因为服务器没有使用无线，所以在配置文件
中删除了无线的设置，
> # Wireless NIC cards
> #device        wlan        # 802.11 support
> #device        wlan_wep    # 802.11 WEP support
> #device        wlan_ccmp    # 802.11 CCMP support
> #device        wlan_tkip    # 802.11 TKIP support
> #device        wlan_amrr    # AMRR transmit rate control algorithm
> #device        wlan_scan_ap    # 802.11 AP mode scanning
> #device        wlan_scan_sta    # 802.11 STA mode scanning
[...]

错误是提示rum 需要无线协议，去除去 USB rum设置的支持即可
> # USB support
[...]
#device        rum        # Ralink Technology RT2501USB wireless NICs