.\TNKernelF4\CortexM4F/tn_port_cm4f.h(166): error:  #247: function "__get_PRIMASK" has already been defined
  __get_PRIMASK(void)
.\TNKernelF4\CortexM4F/tn_port_cm4f.h(179): error:  #247: function "__set_PRIMASK" has already been defined
  __set_PRIMASK(unsigned long mask)

#include <al_discovery_led.h>
#include <tn.h>


//----------- Tasks ----------------------------------------------------------

#define  TASK_0_PRIORITY 7
#define  TASK_0_STK_SIZE 128
align_attr_start unsigned int task_0_stack[TASK_0_STK_SIZE] align_attr_end;
TN_TCB  task_0;
void task_0_func(void);

//----------------------------------------------------------------------------

#define VECTACTIVE  (0x000001FF)
#define rNVIC_ICSR  (*((__IO unsigned int*)0xE000ED04))

void tn_cpu_int_enable()
{
   tn_arm_enable_interrupts();
}

//----------------------------------------------------------------------------
int tn_inside_int(void)
{
   if(rNVIC_ICSR & VECTACTIVE)
      return 1;
   return 0;
}


int main( void )
{
//    tn_arm_disable_interrupts();
    al_discovery_LED_init();
    tn_start_system();
    while(1)
    {
    }
}

void tn_app_init ()
{

   task_0.id_task = 0;
   tn_task_create(&task_0,               //-- task TCB
                 task_0_func,            //-- task function
                 TASK_0_PRIORITY,        //-- task priority
                 &(task_0_stack          //-- task stack first addr in memory
                    [TASK_0_STK_SIZE-1]),
                 TASK_0_STK_SIZE,        //-- task stack size (in int,not bytes)
                 NULL,                          //-- task function parameter
                 TN_TASK_START_ON_CREATION      //-- Creation option
                 );
}

//----------------------------------------------------------------------------
void task_0_func (void)
{
   for(;;)
   {
    al_discovery_LED_on(BLUE);
    tn_task_sleep(128);
   }
}

                b       .                               // Never reach this