请问tcpdump.tar软件包是干什么用的？我怎么安装不上？

[weixin_38060626]

我./configure时候告诉我“configure: error: see the INSTALL doc for more info”。我看了INSTALL 文件看不懂，贴出来，请大家帮我看看，
If you have not built libpcap, do so first.  See the README
file in this directory for the ftp location.

You will need an ANSI C compiler to build tcpdump. The configure script
will abort if your compiler is not ANSI compliant. If this happens, use
the GNU C compiler, available via anonymous ftp:

        ftp://ftp.gnu.org/pub/gnu/gcc/

After libpcap has been built (either install it with "make install" or
make sure both the libpcap and tcpdump source trees are in the same
directory), run ./configure (a shell script).  "configure" will
determine your system attributes and generate an appropriate Makefile
from Makefile.in.  Now build tcpdump by running "make".