My build.bat doesn't work

[Gattuzo]

Appears when I run firmware/build.bat:

C:\Users\edube\Desktop\Psychson-master\firmware>build.bat
*** Building main.c...
timers.h:9: warning 283: function declarator with no prototype
main.c:5: syntax error: token -> '0' ; column 39
*** There were errors! ***
*** Done.

Can anyone help?