[libvirt] Compiling a simple code which include libvirt

I am trying to compile this code by two methods but it shows error 1) Without -lvirt option */tmp/ccHGRn8q.o: In function `main': ex1.c:(.text+0x15): undefined reference to `virConnectOpen' ex1.c:(.text+0x57): undefined reference to `virConnectClose'* 2) with -lvirt option */usr/bin/ld: cannot find -lvirt collect2: ld returned 1 exit status* Someone help me!