when I use strlcpy function in c the compilor give me an error

Someone told me to use the strlcpy function instead of strcpy like this

#include <stdio.h>
#include <string.h>

void main()
{
   char var1[6] = "stuff";
   char var2[7] = "world!";
   strlcpy(var1, var2, sizeof(var2));
   printf("hello %s", var1);

} 

and when I compile the file it gives me the following error:

C:\Users\PC-1\AppData\Local\Temp\ccafgEAb.o:c.c:(.text+0x45): undefined referenc
e to `strlcpy'
collect2.exe: error: ld returned 1 exit status

notice: I have installed MinGW (Minimalist GNU for Windows) and gcc version is 4.7.2

What is the problem?