Build_note

Error Message 01

<stdin>:1365:2: warning: #warning syscall epoll_pwait not implemented
  CHK     include/linux/compile.h
make[1]: *** No rule to make target `firmware/rt73.bin', needed by `firmware/rt73.bin.gen.o'.  Stop.
make: *** [firmware] Error 2
cp: cannot stat `./arch/arm/boot/uImage': No such file or directory


Fix:

  │   Location:                                                             │  
  │     -> Device Drivers                                                   │  
  │       -> Network device support (NETDEVICES [=y])                       │  
  │         -> Wireless LAN                                                 │  
  │           -> Ralink driver support (RT2X00 [=n])  
.....
  │ │    <*> Ralink driver support                                        │ │  
  │ │    < >   Ralink rt2500 (USB) support                                │ │  
  │ │    <*>   Ralink rt2501/rt73 (USB) support                           │ │  
  │ │    [*]     Ralink rt2501/rt73 leds support

don't use Ralink driver support