[Savannah-help-public] Seems to be a problem with stdio under AVR- avr-libc

[Moshe Drori]

Dear Sir,

Please your advice.I think such a problem with avr-libc..( also under powerpc but previously I hope to undersdand this issue under AVR ATmega32).

I build a AVR  GCC environment by the following components

 gcc-4.0.0.tar.bz2
 avr-libc-1.2.3.tar.tar 

Fitting to Avr

$ ../gcc –4.0.0/configure –-target=avr –-enable –languages=”c” –- enable –multilib

$./ configure  - -with-multisubdir =avr5



The following example caused to a following linker problem

it’s work well under Eclipse IDE till to a simple C' stdio.h commnd – sprintf

  char buff[20];
  sprintf (buff, "%s%d", "my_test",100);

make -k all
avr-gcc -mmcu=atmega32 -O2 -Wpadded -g3   -c -o main.o main.c
avr-gcc -mmcu=atmega32 -O2 -Wpadded -g3   -c -o appl.o appl.c
avr-gcc -mmcu=atmega32 -O2 -Wpadded -g3   -c -o asip.o asip.c
avr-gcc -mmcu=atmega32 -O2 -Wpadded -g3   -c -o service.o service.c

avr-gcc -mmcu=atmega32 -O2 -Wpadded -g3 -Wl,-Map,Servo.map -o Servo.elf  main.o appl.o asip.o service.o
/usr/local/lib/gcc/avr/4.0.0/../../../../avr/lib/avr5/libc.a(vfprintf_std.o)(.text+0x98): In function `vfprintf':
/gnu_src/avr-libc-1.2.3/libc/stdio/./vfprintf.c:159: undefined reference to `__mulhi3'
make: *** [Servo.elf] Error 1
make: Target `all' not remade because of errors.

 

 

 it’s working well only without %d – It’s insignificant for me
sprintf (buff, "%s", "my_test");

ake -k all
avr-gcc -mmcu=atmega32 -O2 -Wpadded -g3   -c -o main.o main.c
avr-gcc -mmcu=atmega32 -O2 -Wpadded -g3   -c -o appl.o appl.c
avr-gcc -mmcu=atmega32 -O2 -Wpadded -g3   -c -o asip.o asip.c
avr-gcc -mmcu=atmega32 -O2 -Wpadded -g3   -c -o service.o service.c
avr-gcc -mmcu=atmega32 -O2 -Wpadded -g3 -Wl,-Map,Servo.map -o Servo.elf  main.o appl.o asip.o service.o
avr-objcopy -O ihex Servo.elf Servo.hex
avr-objdump -h Servo.elf > Servo.dump

What can be the problam ? Exactly under PC enviroments it's ok. the problam is only avr

I’ll appreciate if u can response me regarding to this issue or forward me to other direction.

Thanks and Best Regards
Moshe Drori