I downloaded the source files for nut and btnode. The building steps work till I try to make the library-files under lib/ by executing "make clean install" with an error in one of the source files:
avr-gcc -c -mmcu=atmega128 -Os -fno-delete-null-pointer-checks -Wall -Werror -Wstrict-prototypes -Wa,-ahlms=lanc111.lst -D__HARVARD_ARCH__ -DETHERNUT1 -I../include avr/dev/lanc111.c -o avr/dev/lanc111.o
cc1: warnings being treated as errors
avr/dev/lanc111.c: In function 'NicRxLanc':
avr/dev/lanc111.c:1183:9: error: dereferencing type-punned pointer will break strict-aliasing rules
avr/dev/lanc111.c:1183:9: error: dereferencing type-punned pointer will break strict-aliasing rules
make[1]: *** [avr/dev/lanc111.o] Fehler 1
make[1]: Leaving directory `/home/jakob/Desktop/nut/arch'
make: *** [install] Fehler 2