BSP fails to build for FreeRTOS on a Nios V with UART

In the "freertos/drivers/src/":

• intel_lw_uart_init.c
  • line 228~:

if (sp->tx_start == ((sp->tx_end + 1) & ALT_AVALON_UART_BUF_MSK))

{

ALT_FLAG_POST (sp->events,

ALT_UART_WRITE_RDY,

ALT_FLAG_SET);

}

• intel_lw_uart_read.c
  • line 205~:

ALT_FLAG_PEND (sp->events,

ALT_UART_READ_RDY,

ALT_FLAG_WAIT_SET_ANY_WITH_CONSUME,

ALT_FLAG_WAIT_MAX_TIMEOUT);

• intel_lw_uart_write.c
  • line 192~:

ALT_FLAG_PEND (sp->events,

ALT_UART_WRITE_RDY,

ALT_FLAG_WAIT_SET_ANY_WITH_CONSUME,

ALT_FLAG_WAIT_MAX_TIMEOUT);