ok, der error ist weg! habe anstatt i2cmaster.s, i2cmaster.c eingetippt. da kann der ja lang suchen.

Jetzt gibt es aber einen neuen error...

avr-gcc -c -mmcu=atmega8 -DF_CPU=8000000UL -I. -g -Os -I../../lib/inc -funsigned-char -funsigned-bitfields -fpack-struct -fshort-enums -Wall -Wstrict-prototypes -Wa,-ahlms=test.lst test.c -o test.o
test.c: In function 'main':
test.c:18: warning: pointer targets in passing argument 1 of 'SerWrite' differ in signedness
test.c:19: warning: pointer targets in passing argument 1 of 'SerWrite' differ in signedness
avr-gcc -c -mmcu=atmega8 -DF_CPU=8000000UL -I. -g -Os -I../../lib/inc -funsigned-char -funsigned-bitfields -fpack-struct -fshort-enums -Wall -Wstrict-prototypes -Wa,-ahlms=../../lib/asuro.lst ../../lib/asuro.c -o asuro.o
avr-gcc -mmcu=atmega8 -DF_CPU=8000000UL -I. -g -Os -I../../lib/inc -funsigned-char -funsigned-bitfields -fpack-struct -fshort-enums -Wall -Wstrict-prototypes -Wa,-ahlms=test.o test.o asuro.o i2cmaster.s --output test.elf -Wl,-Map=test.map,--cref -L../../lib -lm -lasuro
avr-gcc: i2cmaster.s: No such file or directory
make: *** [test.elf] Error 1

was heißt das?