warning in hello building

[Poletti Francesco]

Hy, I'm developing the port of rtems on an arm simulator.
I'm using arm_bare_bsp has a base to developing my code...

When I build the hello examples I have this warning:

arm-rtems-gcc --pipe -B/home/tesi16/rtems/arm-rtems/arm_bare_bsp/lib/ -specs 
bsp_specs -qrtems -g -Wall  -g     -mcpu=arm7tdmi     -c   -o 
o-optimize/test.o test.c
test.c: In function `Init':
test.c:18: warning: implicit declaration of function `exit'
arm-rtems-gcc --pipe -B/home/tesi16/rtems/arm-rtems/arm_bare_bsp/lib/ -specs 
bsp_specs -qrtems -g -Wall  -g     -mcpu=arm7tdmi      -L 
/home/tesi16/rtems/arm-rtems/arm_bare_bsp/lib    -o o-optimize/hello.obj  
o-optimize/test.o   
/home/tesi16/rtems/arm-rtems/arm_bare_bsp/lib/no-dpmem.rel 
/home/tesi16/rtems/arm-rtems/arm_bare_bsp/lib/no-event.rel 
/home/tesi16/rtems/arm-rtems/arm_bare_bsp/lib/no-msg.rel 
/home/tesi16/rtems/arm-rtems/arm_bare_bsp/lib/no-mp.rel 
/home/tesi16/rtems/arm-rtems/arm_bare_bsp/lib/no-part.rel 
/home/tesi16/rtems/arm-rtems/arm_bare_bsp/lib/no-signal.rel 
/home/tesi16/rtems/arm-rtems/arm_bare_bsp/lib/no-timer.rel 
/home/tesi16/rtems/arm-rtems/arm_bare_bsp/lib/no-rtmon.rel
arm-rtems-nm -g -n o-optimize/hello.obj > o-optimize/hello.num
arm-rtems-size o-optimize/hello.obj
   text    data     bss     dec     hex filename
 170553    2792   11648  184993   2d2a1 o-optimize/hello.obj
arm-rtems-objcopy -O binary o-optimize/hello.obj o-optimize/hello.bin
arm-rtems-objdump -d o-optimize/hello.obj > o-optimize/hello.as
arm-rtems-objdump -x o-optimize/hello.obj > o-optimize/hello.x
cp o-optimize/hello.bin  o-optimize/hello.exe

Anyone may help me?
Thanks all.
Francesco