Compile: 
avr-gcc -Wall -g2 -gstabs -O0 -std=gnu99 -funsigned-char -funsigned-bitfields -mmcu=atmega328p -DF_CPU=1000000UL

Create hex: 
avr-objcopy -R .eeprom -O ihex lambda.elf lambda.hex

Debug info:
avr-objdump -g lambda.elf > debug.txt

Upload hex: 
avrdude -pm328p -cjtag2isp -B10 -Uflash:w:lambda.hex:a

Start AVaRICE: 
avarice -2 -w -B10 -j usb :4242

Start avr-gdb: 
avr-gdb lambda.elf

Connect to remote: 
target remote localhost:4242

Set breakpoint: 
break lambda.c:74

Continue: 
continue

Show variables, eval code: 
p time
p getTime()