root@superman-X450JN:/home/superman/Downloads/compat-drivers-3.9-rc4-2-s# make
make -C /lib/modules/3.18.0-9-generic/build M=/home/superman/Downloads/compat-drivers-3.9-rc4-2-s modules
make[1]: Entering directory '/usr/src/linux-headers-3.18.0-9-generic'
CC [M] /home/superman/Downloads/compat-drivers-3.9-rc4-2-s/drivers/net/wireless/ath/ath9k/debug.o
/home/superman/Downloads/compat-drivers-3.9-rc4-2-s/drivers/net/wireless/ath/ath9k/debug.c: In function ‘write_file_tx_chainmask’:
/home/superman/Downloads/compat-drivers-3.9-rc4-2-s/drivers/net/wireless/ath/ath9k/debug.c:117:2: error: implicit declaration of function ‘strict_strtoul’ [-Werror=implicit-function-declaration]
if (strict_strtoul(buf, 0, &mask))
^
cc1: some warnings being treated as errors
scripts/Makefile.build:257: recipe for target '/home/superman/Downloads/compat-drivers-3.9-rc4-2-s/drivers/net/wireless/ath/ath9k/debug.o' failed
make[5]: *** [/home/superman/Downloads/compat-drivers-3.9-rc4-2-s/drivers/net/wireless/ath/ath9k/debug.o] Error 1
scripts/Makefile.build:402: recipe for target '/home/superman/Downloads/compat-drivers-3.9-rc4-2-s/drivers/net/wireless/ath/ath9k' failed
make[4]: *** [/home/superman/Downloads/compat-drivers-3.9-rc4-2-s/drivers/net/wireless/ath/ath9k] Error 2
scripts/Makefile.build:402: recipe for target '/home/superman/Downloads/compat-drivers-3.9-rc4-2-s/drivers/net/wireless/ath' failed
make[3]: *** [/home/superman/Downloads/compat-drivers-3.9-rc4-2-s/drivers/net/wireless/ath] Error 2
scripts/Makefile.build:402: recipe for target '/home/superman/Downloads/compat-drivers-3.9-rc4-2-s/drivers/net/wireless' failed
make[2]: *** [/home/superman/Downloads/compat-drivers-3.9-rc4-2-s/drivers/net/wireless] Error 2
Makefile:1393: recipe for target '_module_/home/superman/Downloads/compat-drivers-3.9-rc4-2-s' failed
make[1]: *** [_module_/home/superman/Downloads/compat-drivers-3.9-rc4-2-s] Error 2
make[1]: Leaving directory '/usr/src/linux-headers-3.18.0-9-generic'
Makefile:90: recipe for target 'modules' failed
make: *** [modules] Error 2