avr-gcc -c -g -Os -Wall -Wstrict-prototypes -I/media/sandbox/xtools/avr-dev/build/avr/lib/avrlib -Wa,-ahlms=main.lst -mmcu=attiny13  -I/media/sandbox/xtools/avr-dev/build/avr/include -I/media/sandbox/xtools/avr-dev/build/avr/avr/include -I. main.c -o main.o
In file included from main.c:19:
/media/sandbox/xtools/avr-dev/build/avr/lib/gcc/avr/3.4.4/../../../../avr/include/avr/signal.h:36:2: warning: #warning "This header file is obsolete.  Use <avr/interrupt.h>."
main.c: In function `servoTest':
main.c:66: error: `PORTC' undeclared (first use in this function)
main.c:66: error: (Each undeclared identifier is reported only once
main.c:66: error: for each function it appears in.)
main.c:66: error: `PC0' undeclared (first use in this function)
main.c:67: error: `PC1' undeclared (first use in this function)
main.c:68: error: `PC2' undeclared (first use in this function)
main.c:69: error: `PC3' undeclared (first use in this function)
main.c:72: error: `DDRC' undeclared (first use in this function)
make: *** [main.o] Error 1