That's dynamically loaded, try it with the runtime

    $ gcc hello.c
    $ ls -l a.out
    -rwxr-xr-x 1 maht maht 4511 Oct 11 16:38 a.out
    $ gcc --static hello.c
    $ ls -l a.out
    -rwxr-xr-x 1 maht maht 574106 Oct 11 16:38 a.out