DKMS make.log for bcmwl-6.30.223.248+bdcom for kernel 4.4.0-34-generic (i686)
Wed Aug 24 14:52:00 IST 2016
make: Entering directory `/usr/src/linux-headers-4.4.0-34-generic'
CFG80211 API is prefered for this kernel version
Using CFG80211 API
  LD      /var/lib/dkms/bcmwl/6.30.223.248+bdcom/build/built-in.o
  CC [M]  /var/lib/dkms/bcmwl/6.30.223.248+bdcom/build/src/shared/linux_osl.o
/var/lib/dkms/bcmwl/6.30.223.248+bdcom/build/src/shared/linux_osl.c: In function 'osl_getcycles':
/var/lib/dkms/bcmwl/6.30.223.248+bdcom/build/src/shared/linux_osl.c:935:2: error: implicit declaration of function 'rdtscl' [-Werror=implicit-function-declaration]
  rdtscl(cycles);
  ^
/var/lib/dkms/bcmwl/6.30.223.248+bdcom/build/src/shared/linux_osl.c: At top level:
cc1: warning: unrecognized command line option "-Wno-date-time" [enabled by default]
cc1: some warnings being treated as errors
make[1]: *** [/var/lib/dkms/bcmwl/6.30.223.248+bdcom/build/src/shared/linux_osl.o] Error 1
make: *** [_module_/var/lib/dkms/bcmwl/6.30.223.248+bdcom/build] Error 2
make: Leaving directory `/usr/src/linux-headers-4.4.0-34-generic'