RCOoutput compilation errors

gistfile1.txt

%% libraries/AP_HAL_Linux/RCOutput.o
In file included from /root/ardupilot/libraries/AP_HAL_Linux/AP_HAL_Linux.h:33:0,
                 from /root/ardupilot/libraries/AP_HAL_Linux/RCOutput.h:5,
                 from /root/ardupilot/libraries/AP_HAL_Linux/RCOutput.cpp:6:
/root/ardupilot/libraries/AP_HAL_Linux/AP_HAL_Linux_Main.h:11:17: warning: backslash and newline separated by space [enabled by default]
/root/ardupilot/libraries/AP_HAL_Linux/RCOutput.cpp:4:0: error: unterminated #if
/root/ardupilot/libraries/AP_HAL_Linux/RCOutput.cpp:17:6: error: 'LinuxRCOutput' has not been declared
/root/ardupilot/libraries/AP_HAL_Linux/RCOutput.cpp: In function 'void init()':
/root/ardupilot/libraries/AP_HAL_Linux/RCOutput.cpp:61:35: error: 'write1' was not declared in this scope
/root/ardupilot/libraries/AP_HAL_Linux/RCOutput.cpp:67:35: error: 'write1' was not declared in this scope
/root/ardupilot/libraries/AP_HAL_Linux/RCOutput.cpp: At global scope:
/root/ardupilot/libraries/AP_HAL_Linux/RCOutput.cpp:79:6: error: 'LinuxRCOutput' has not been declared
/root/ardupilot/libraries/AP_HAL_Linux/RCOutput.cpp:102:10: error: 'LinuxRCOutput' has not been declared
/root/ardupilot/libraries/AP_HAL_Linux/RCOutput.cpp:123:6: error: 'LinuxRCOutput' has not been declared
/root/ardupilot/libraries/AP_HAL_Linux/RCOutput.cpp:140:6: error: 'LinuxRCOutput' has not been declared
/root/ardupilot/libraries/AP_HAL_Linux/RCOutput.cpp:157:6: error: 'LinuxRCOutput' has not been declared
/root/ardupilot/libraries/AP_HAL_Linux/RCOutput.cpp:175:6: error: 'LinuxRCOutput' has not been declared
/root/ardupilot/libraries/AP_HAL_Linux/RCOutput.cpp:196:10: error: 'LinuxRCOutput' has not been declared
/root/ardupilot/libraries/AP_HAL_Linux/RCOutput.cpp:216:6: error: 'LinuxRCOutput' has not been declared
make: *** [/tmp/ArduCopter.build/libraries/AP_HAL_Linux/RCOutput.o] Error 1