Error when trying to compile Pocket_AVR_Programmer firmware

[hansake]

When trying to compile the Pocket_AVR_Programmer firmware I get:
~/AVR/Pocket_AVR_Programmer-master/Firmware/pocket-prog/spi$ make all
avr-gcc -Os -g -Wall -I. -I../usbtiny -mmcu=attiny2313 -c ../usbtiny/crc.S
In file included from ../usbtiny/crc.S:22:0:
../usbtiny/def.h:39:13: error: attempt to use poisoned "SIG_INT0"
#if defined SIG_INT0
^
make: *** [../usbtiny/common.mk:56: crc.o] Error 1

I am using gcc/avr/5.4.0
Any idea what is wrong?
/Hans-Åke