o.K. Also corde duo das kommt heraus bei deiner Funktion.

Code:
> "C:\ASURO_src\FirstTry\Test-all.bat" 

C:\ASURO_src\FirstTry>make all 
set -e; avr-gcc -MM -mmcu=atmega8 -I. -g -Os -funsigned-char -funsigned-bitfields -fpack-struct -fshort-enums -Wall -Wstrict-prototypes -Wa,-ahlms=test.lst test.c \
	| sed 's,\(.*\)\.o[ :]*,\1.o \1.d : ,g' > test.d; \
	[ -s test.d ] || rm -f test.d
-------- begin --------
avr-gcc --version
avr-gcc (WinAVR 20090313) 4.3.2
Copyright (C) 2008 Free Software Foundation, Inc.
This is free software; see the source for copying conditions.  There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

Size before:
test.elf  :
section           size      addr
.text             1704         0
.bss                 1   8388704
.debug_aranges      64         0
.debug_pubnames    263         0
.debug_info       1072         0
.debug_abbrev      414         0
.debug_line       1142         0
.debug_frame       288         0
.debug_str         360         0
.debug_loc         388         0
Total             5696


avr-gcc -c -mmcu=atmega8 -I. -g -Os -funsigned-char -funsigned-bitfields -fpack-struct -fshort-enums -Wall -Wstrict-prototypes -Wa,-ahlms=test.lst test.c -o test.o
test.c: In function 'PrintInt':
test.c:11: warning: implicit declaration of function 'itoa'
test.c:12: warning: implicit declaration of function 'strlen'
test.c:12: warning: incompatible implicit declaration of built-in function 'strlen'
test.c:12: warning: pointer targets in passing argument 1 of 'SerWrite' differ in signedness
test.c: In function 'main':
test.c:21: warning: pointer targets in passing argument 1 of 'SerWrite' differ in signedness
test.c:27: error: expected declaration or statement at end of input
make: *** [test.o] Error 1

> Process Exit Code: 2
> Time Taken: 00:02