$sudo make
[: 1: -gt: argument expected
test: 1: -ge: unexpected operator
make -C /lib/modules/3.0.0-16-generic/build M=/home/umpirsky/Downloads/compat-wireless-2.6.38.2-2 modules
make[1]: Entering directory `/usr/src/linux-headers-3.0.0-16-generic'
  CC [M]  /home/umpirsky/Downloads/compat-wireless-2.6.38.2-2/net/wireless/util.o
/home/umpirsky/Downloads/compat-wireless-2.6.38.2-2/net/wireless/util.c: In function ‘cfg80211_change_iface’:
/home/umpirsky/Downloads/compat-wireless-2.6.38.2-2/net/wireless/util.c:788:2: error: implicit declaration of function ‘br_port_exists’ [-Werror=implicit-function-declaration]
cc1: some warnings being treated as errors

make[3]: *** [/home/umpirsky/Downloads/compat-wireless-2.6.38.2-2/net/wireless/util.o] Error 1
make[2]: *** [/home/umpirsky/Downloads/compat-wireless-2.6.38.2-2/net/wireless] Error 2
make[1]: *** [_module_/home/umpirsky/Downloads/compat-wireless-2.6.38.2-2] Error 2
make[1]: Leaving directory `/usr/src/linux-headers-3.0.0-16-generic'
make: *** [modules] Error 2