Hier een output:
# make
Checking requirements... ok.
Checking kernel configuration... ok.
make -C /lib/modules/2.6.27-6-generic/build SUBDIRS=/usr/src/madwifi-0.9.4 modules
make[1]: Entering directory `/usr/src/linux-headers-2.6.27-6-generic'
CC [M] /usr/src/madwifi-0.9.4/net80211/ieee80211_power.o
/usr/src/madwifi-0.9.4/net80211/ieee80211_power.c: In function 'ieee80211_pwrsave':
/usr/src/madwifi-0.9.4/net80211/ieee80211_power.c:240: error: implicit declaration of function '__skb_append'
make[3]: *** [/usr/src/madwifi-0.9.4/net80211/ieee80211_power.o] Error 1
make[2]: *** [/usr/src/madwifi-0.9.4/net80211] Error 2
make[1]: *** [_module_/usr/src/madwifi-0.9.4] Error 2
make[1]: Leaving directory `/usr/src/linux-headers-2.6.27-6-generic'
make: *** [modules] Error 2