CCS/MSP432P401R: Unresolved symbol f_gets, first referenced | FatFs

#include <Hardware/SPI_Driver.h>
#include <Hardware/GPIO_Driver.h>
#include <Hardware/CS_Driver.h>
#include <Hardware/TIMERA_Driver.h>
#include <fatfs/ff.h>
#include <fatfs/diskio.h>
#include <Devices/MSPIO.h>

/* MISO = P1.7
 * MOSI = P1.6
 * SCK = P1.5
 * CS = P5.0
 * VCC = 3.3V
 * GND = GND
 */

/*Huge thanks to bluehash @ github.com/.../

/* UART Configuration Parameter. These are the configuration parameters to
 * make the eUSCI A UART module to operate with a 115200 baud rate. These
 * values were calculated using the online calculator that TI provides
 * at:
 * software-dl.ti.com/.../index.html
 */
eUSCI_UART_Config UART0Config =
{
     EUSCI_A_UART_CLOCKSOURCE_SMCLK,
     13,
     0,
     37,
     EUSCI_A_UART_NO_PARITY,
     EUSCI_A_UART_LSB_FIRST,
     EUSCI_A_UART_ONE_STOP_BIT,
     EUSCI_A_UART_MODE,
     EUSCI_A_UART_OVERSAMPLING_BAUDRATE_GENERATION
};

/* SPI Configuration Parameter. These are the configuration parameters to
 * make the eUSCI B SPI module to operate with a 500KHz clock.*/
eUSCI_SPI_MasterConfig SPI0MasterConfig =
{
     EUSCI_B_SPI_CLOCKSOURCE_SMCLK,
     3000000,
     500000,
     EUSCI_B_SPI_MSB_FIRST,
     EUSCI_B_SPI_PHASE_DATA_CHANGED_ONFIRST_CAPTURED_ON_NEXT,
     EUSCI_B_SPI_CLOCKPOLARITY_INACTIVITY_HIGH,
     EUSCI_B_SPI_3PIN
};

/* Timer_A UpMode Configuration Parameters */
Timer_A_UpModeConfig upConfig =
{
        TIMER_A_CLOCKSOURCE_SMCLK,              // SMCLK Clock Source
        TIMER_A_CLOCKSOURCE_DIVIDER_64,          // SMCLK/1 = 3MHz
        30000,                                  // 1 ms tick period
        TIMER_A_TAIE_INTERRUPT_DISABLE,         // Disable Timer interrupt
        TIMER_A_CCIE_CCR0_INTERRUPT_ENABLE ,    // Enable CCR0 interrupt
        TIMER_A_DO_CLEAR                        // Clear value
};

FATFS FatFs;   /* Work area (filesystem object) for logical drive */


void main(void)
{
    WDT_A_holdTimer();

    CS_Init();

    /*Initialize all hardware required for the SD Card*/
    SPI_Init(EUSCI_B0_BASE, SPI0MasterConfig);
    UART_Init(EUSCI_A0_BASE, UART0Config);
    GPIO_Init(GPIO_PORT_P5, GPIO_PIN0);
    TIMERA_Init(TIMER_A1_BASE, UP_MODE, &upConfig, disk_timerproc);

    Interrupt_enableMaster();

    FIL fil;        /* File object */
    char line[100]; /* Line buffer */
    FRESULT fr;     /* FatFs return code */


    /* Register work area to the default drive */
    f_mount(&FatFs, "", 0);

    /* Open a text file */
    fr = f_open(&fil, "message.txt", FA_READ);
    if (fr) return (int)fr;

    /* Read every line and display it */
    while (f_gets(line, sizeof line, &fil)) {
        //printf(line);
    }

    /* Close the file */
    f_close(&fil);

    return 0;
	
}