alt_timestamp() issue!

Hi,

I am working with Altera Stratix FPGA and NiosII processor.

In Hello_World program I wanted to check time duration using HAl API alt_timestamp() and alt_timestamp_start().

i wrote progarm like this:

# include <stdio.h># include "sys/alt_timestamp.h"# include "alt_types.h"

int main (void)

{

alt_u32 time1;

alt_u32 time2;

alt_timestamp_start();

time1 = alt_timestamp();

printf("hello from niosII!\n");

time2 = alt_timestamp();

printf("value =%u \n", (unsigned int) (time2-time1));

return 0;

}

after build it is showing following error:

Info: Linking Hello_World_0.elf

nios2-elf-g++ -T'../Hello_World_0_bsp/linker.x' -msys-crt0='../Hello_World_0_bsp/obj/HAL/src/crt0.o' -msys-lib=hal_bsp -L../Hello_World_0_bsp -Wl,-Map=Hello_World_0.map -O0 -g -Wall -EL -mno-hw-div -mhw-mul -mno-hw-mulx -o Hello_World_0.elf obj/hello_world.o -lm

obj/hello_world.o: In function `main':

D:\Bharani_15RPM\Bharanisp_ep1s80_15rpm_15June2011_v6_50Mhz\software\Hello_World_0/hello_world.c:33: undefined reference to `alt_timestamp_start'

D:\Bharani_15RPM\Bharanisp_ep1s80_15rpm_15June2011_v6_50Mhz\software\Hello_World_0/hello_world.c:35: undefined reference to `alt_timestamp'

D:\Bharani_15RPM\Bharanisp_ep1s80_15rpm_15June2011_v6_50Mhz\software\Hello_World_0/hello_world.c:39: undefined reference to `alt_timestamp'

collect2: ld returned 1 exit status

make: *** [Hello_World_0.elf] Error 1

can anyone tell me what may be expected mistake?

Thanks in advance!

sblrde