Arduino :1.8.5 (Windows 10), º¸µå:"Arduino/Genuino Uno"

In file included from sketch\MarlinConfig.h:26:0,

                 from C:\Users\soeer\Desktop\Marlin-1.1.x\Marlin-1.1.x\Marlin\Marlin.ino:31:

fastio.h:56: error: #error "Pins for this chip not defined in Arduino.h! If you have a working pins definition, please contribute!"

   #error "Pins for this chip not defined in Arduino.h! If you have a working pins definition, please contribute!"

    ^

fastio.h:314: error: #error "unknown CPU"

   #error "unknown CPU"

    ^

In file included from sketch\pins.h:61:0,

                 from sketch\MarlinConfig.h:34,

                 from C:\Users\soeer\Desktop\Marlin-1.1.x\Marlin-1.1.x\Marlin\Marlin.ino:31:

pins_RAMPS.h:48: error: #error "Oops!  Make sure you have 'Arduino Mega' selected from the 'Tools -> Boards' menu."

   #error "Oops!  Make sure you have 'Arduino Mega' selected from the 'Tools -> Boards' menu."

    ^

exit status 1
#error "Pins for this chip not defined in Arduino.h! If you have a working pins definition, please contribute!"