TCP/IP Stack error: undefined reference to 'alt_iniche_init()'

I am using Nios II IDE 9.0SPE build 235 to implement web server on nios processor with ucOS.

I added the software component 'NicheStack TCP/IP Stack' through Properties.

I get the below error:

undefined reference to `alt_iniche_init()'

undefined reference to `dhc_set_callback(int, int (*)(int, int))'

undefined reference to `dhc_set_state(int, int)'

undefined reference to `netmain()'

In the syslib folder > Debug > obj > iniche and rest of the TCP/IP folders are present

How do I debug this issue? What else should be done so that the system know about `alt_iniche_init()' ,etc?

Code (partial):

# include <stdio.h>

# include <math.h>

# include <unistd.h> // <bae> Allows usleep() to be called

# include <alt_iniche_dev.h>

/* Nichestack definitions */

# include "includes.h"

# include "ipport.h"

# include "libport.h"

# include "osport.h"

# include "tcpport.h"

# include "net.h"

# include "dhcpclnt.h"

# include "icmp.h"

/* Low-level network */

# include "triple_speed_ethernet_regs.h"

# include "iniche/triple_speed_ethernet_iniche.h"

# include "iniche/ins_tse_mac.h"

/* Nichestack definitions */

# include "includes.h"

# include "ipport.h"

# include "libport.h"

# include "osport.h"

# include "tcpport.h"

# include "net.h"

# include "dhcpclnt.h"

# include "icmp.h"

.

.

.

.

.

...

.....

void SSSInitialTask(void *task_data)

{

wait_on_phy();

dhc_set_callback( 0, ws_ipset );

alt_iniche_init();

netmain();

while (!iniche_net_ready)

{

TK_SLEEP(1);

OSTimeDlyHMSM(0, 0, 3, 0);

}

printf("\nNios II Simple Socket Server starting up.\n");

while (1); /* Correct Program Flow should never get here */

}