problem printing floating point values inside realtime tasks

Hello to all,

I tried printing a simple floating point value inside a real-time thread using:
  
   rtl_printf("%lf \n",dd_value);

but somehow it manages to print only:   
   %f
and not the value.

I have already used included the following in my code:

  pthread_attr_init(&attr);
  pthread_attr_setfp_np(&attr, 1);

  pthread_create( &mythread, &attr, mythreadcode, (void *)0);

I also have the following in my Makefile:
  -L/usr/lib -lm -lc

Am I missing something?

Thanks.

Allan
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