Hi Team, 

               Now it's working fine with c11 standard. 


Thanks & Regards, 
Naveen. 

On Thu, 1 Jun, 2023, 2:25 pm Guy Harris, <gharris@sonic.net> wrote:
On Jun 1, 2023, at 1:12 AM, Naveen kumar <navinagaraj18@gmail.com> wrote:

>     I added the -std=gnu11 options also it's shows same error.

So you added it to the CFLAGS= line in the Makefile and it still complains about "restrict"?  If so, what happens if you add "-std=gnu99" instead?

Or you ran

        make CFLAGS="-std=gnu11" ...

and it still complains about "restrict"?  If so, what happens if you use "-std=gnu99" instead?