Error #10056 when including headers

I'm trying to get some of Energia's digital pins functions to work with Olimex's MSP430-T5510, which uses a MSP430F5510 but I'm running into a bit of a pickle with a linking error. I've included the source file. Can you please have a look at it and see how including #include guards doesn't solve the problem? 

#10010 errors encountered during linking; 
#10056 symbol "port_to_output" redefined: first defined in "./DigitalPinsMap/PinFunctions.obj"; redefined in "./main.obj"	
#10056 symbol "port_to_dir" redefined: first defined in "./DigitalPinsMap/PinFunctions.obj"; redefined in "./main.obj"
#10056 symbol "digital_pin_to_bit_mask" redefined: first defined in "./DigitalPinsMap/PinFunctions.obj"; redefined in "./main.obj"
#10056 symbol "digital_pin_to_port" redefined: first defined in "./DigitalPinsMap/PinFunctions.obj"; redefined in "./main.obj"	
#10056 symbol "port_to_ren" redefined: first defined in "./DigitalPinsMap/PinFunctions.obj"; redefined in "./main.obj"
#10056 symbol "port_to_input" redefined: first defined in "./DigitalPinsMap/PinFunctions.obj"; redefined in "./main.obj"

Cheers.