Error compiling(firmware.px4)

Hi,friends
There was some errors when I was compiling the UART_test example.
just like this:
[/c/ardupilot/modules/PX4Firmware/Build/px4fmu-v2_APM.build/firmware.px4] Error 2
Any suggestions on how I can get it to compile?

The error is on the lines above this… probably a problem in the example. Take a look on some lines above.