Error in Hello_world_small compilation !

Hi,

I'm just trying to get nios II ide to work with a simple Hello_world_small application.

But I get a compilation error related to the "alt_putstr()" function...

The board is working without this function (ie. led counting etc..)

I leave all the setting to the defaults settings ...

Here, the first error :

/cygdrive/c/altera/81/nios2eds/components/altera_hal/HAL/src/alt_putstr.c undefined reference to `null'

Then the following 4 errors are related to this function...

Here the console output :

**** Build of configuration Release for project hello_world_small_1 ****
make -s all includes 
Compiling hello_world_small.c...
Linking hello_world_small_0.elf...
/cygdrive/c/NiosII/software/hello_world_small_0_syslib/Release/libhello_world_small_0_syslib.a(alt_putstr.o)(.text+0x1c): In function `alt_putstr':
/cygdrive/c/altera/81/nios2eds/components/altera_hal/HAL/src/alt_putstr.c:64: undefined reference to `null'
/cygdrive/c/NiosII/software/hello_world_small_0_syslib/Release/libhello_world_small_0_syslib.a(alt_putstr.o)(.text+0x20):/cygdrive/c/altera/81/nios2eds/components/altera_hal/HAL/src/alt_putstr.c:64: undefined reference to `null'
/cygdrive/c/NiosII/software/hello_world_small_0_syslib/Release/libhello_world_small_0_syslib.a(alt_putstr.o)(.text+0x28):/cygdrive/c/altera/81/nios2eds/components/altera_hal/HAL/src/alt_putstr.c:64: undefined reference to `ALT_MODULE_CLASS_null_write'
/cygdrive/c/NiosII/software/hello_world_small_0_syslib/Release/libhello_world_small_0_syslib.a(alt_putstr.o)(.text+0x2c):/cygdrive/c/altera/81/nios2eds/components/altera_hal/HAL/src/alt_putstr.c:64: undefined reference to `ALT_MODULE_CLASS_null_write'
collect2: ld returned 1 exit status
make: ***  Error 1
Build completed in 14.321 seconds

Please help me, what's wrong ?