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Boost Network Library not recognized on MAC OSX

So my current code I am trying to compile:

#include <boost/network/protocol/http/client.hpp>

int main()
{
    boost::network::http::client client;

    boost::network::http::client::request request("http://www.example.com");
    request << boost::network::header("Connection", "close");
    boost::network::http::client::response response = client.get(request);

    std::cout << body(response);

    return 0;
}

All code harvested from [this post] ( How can I fetch data from a website inside a C++ program ). So I've tried running this thing by itself with a few different scripts provided, but none have worked. Here are some of the scripts I've tried:

g++ -I. -I$BOOST_ROOT -L$BOOST_ROOT/stage/lib -lboost_system
g++ -I. -I/usr/local/include/boost -lboost_thread -lboost_system
-lcppnetlib -client -connections -lcppnetlib -server -parsers
-lcppnetlib -uri -pthread main.cpp
./a.out

I have also tried:

g++ -I. -I$BOOST_ROOT -L$BOOST_ROOT/stage/lib -lboost_system -pthread main.cpp

And also tried:

g++ -I. -I/usr/local/Cellar/boost/1.59.0/include/boost -L/usr/local/Cellar/boost/1.59.0/lib -lboost_system pthread main.cpp

But I noticed after reading some more posts that the -I is used to signify the header files for boost in their root directory and the -L is used to find the libraries for the boost root directory. So I am not sure exactly what I've downloaded because I now have 2 copies and I am not sure if either of them work, and I am tried every combination to try to get this thing running. Apparently I have several copies of boost sitting all over the place. So the /usr/local/Cellar directory holds both up to date ones..

/usr/local/Cellar/boost/1.59.0/include/boost

/usr/local/Cellar/boost/1.59.0/include/lib

Also, the /usr/local/ directory holds both..

/usr/local/include/boost/

/usr/local/lib

And again,

/usr/local/opt/boost/include

/usr/local/opt/boost/include/lib

Does having multiple copies disrupt the process or something? I am so confused.

This is my directory structure:
目录结构

So my I've tried figuring this out and I am simply stumped.. I am not good with scripting (just recently learned most of it from this issue), and I simply do not know how to compile this thing.. Any help is any way, shape, or form is beyond appreciated. Thanks in advance to anyone who helps.

Example was provided for cpp-netlib , which is not part of Boost C++.

But it can be built and installed as addition to your Boost installation as described in README .

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