Using ROM_ function

I'm trying to use ROM_ functions to initialize the following code:

#include <stdint.h>
#include <stdbool.h>
#include "inc/hw_memmap.h"
#include "inc/hw_types.h"
#include "driverlib/gpio.h"
#include "driverlib/pin_map.h"
#include "driverlib/sysctl.h"
#include "driverlib/uart.h"
#include "driverlib/rom.h"
#include "driverlib/rom_map.h"
#include "gets.h"

#define BUFFER_SIZE 39

uint32_t ui32SysClkFreq;

int main(void)
{
	char string_[BUFFER_SIZE+1];
	uint32_t ui32strLen;

	ui32SysClkFreq = SysCtlClockFreqSet((SYSCTL_XTAL_25MHZ |
		  SYSCTL_OSC_MAIN | SYSCTL_USE_PLL |
			SYSCTL_CFG_VCO_480), 120000000);

	//
	// Configure the appropriate pins as UART pins; in this case, PA0/PA1 are
	// used for UART0.
	//
	ROM_SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOA);
	ROM_SysCtlPeripheralEnable(SYSCTL_PERIPH_UART0);

	ROM_GPIOPinConfigure(GPIO_PA0_U0RX);
	ROM_GPIOPinConfigure(GPIO_PA1_U0TX);

	ROM_GPIOPinTypeUART(GPIO_PORTA_BASE, GPIO_PIN_0 | GPIO_PIN_1);
	//
	// Initialize the UART standard IO module, when using an 80 MHz system
	// clock.
	UARTStdioConfig(0, 115200, ui32SysClkFreq);
	//
	// Print a string.
	//
	UARTprintf("HELLO\r\n");

	while(1){
		if (UARTCharsAvail(UART0_BASE)) {
			ui32strLen = UARTgets(string_, BUFFER_SIZE+1);
			if (ui32strLen == (BUFFER_SIZE+1)) {
				string_[BUFFER_SIZE] = '\0';
			}
		UARTprintf("String: %s \r\n", string_);
		}
	}
}

but when i try to build i get the following errors:

If I remove the ROM_ before the functions or change it to MAP_ the code compiles and runs without any problem.

What do I have to do to use those functions?