使用 Boost 库的 C++ 代码以退出值 -1 终止（这是什么意思？）

Question

我正在尝试启动一个使用 boost 库连接到网络服务器的 cpp 代码 (echo.websocket.org)。我已成功编译代码，0 个错误和 0 个警告。

//
// Copyright (c) 2016-2017 Vinnie Falco (vinnie dot falco at gmail dot com)
//
// Distributed under the Boost Software License, Version 1.0. (See 
accompanying
// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
//
// Official repository: https://github.com/boostorg/beast
//

//------------------------------------------------------------------------ 
//
// Example: WebSocket client, synchronous
//
//------------------------------------------------------------------------        
//[example_websocket_client

#include <boost/beast/core.hpp>
#include <boost/beast/websocket.hpp>
#include <boost/asio/connect.hpp>
#include <boost/asio/ip/tcp.hpp>
#include <cstdlib>
#include <iostream>
#include <string>

namespace beast = boost::beast;         // from <boost/beast.hpp>
namespace http = beast::http;           // from <boost/beast/http.hpp>
namespace websocket = beast::websocket; // from 
<boost/beast/websocket.hpp>
namespace net = boost::asio;            // from <boost/asio.hpp>
using tcp = boost::asio::ip::tcp;       // from <boost/asio/ip/tcp.hpp>
using namespace std;

// Sends a WebSocket message and prints the response
int main(int argc, char** argv)
{
    cout <<"Reached "<< endl;
    std::cout <<"Reached "<< argv[1] << std::endl;
    std::cout <<"Reached "<< argv[2] << std::endl;
    std::cout <<"Reached "<< argv[3] << std::endl;

 try
{
    // Check command line arguments.
    if(argc != 4)
    {
        std::cerr <<
            "Usage: websocket-client-sync <host> <port> <text>\n" <<
            "Example:\n" <<
            "    websocket-client-sync echo.websocket.org 80 \"Hello, world!\"\n";
        return EXIT_FAILURE;
    }
    auto const host = argv[1];
    auto const port = argv[2];
    auto const text = argv[3];

    // The io_context is required for all I/O
    net::io_context ioc;

    // These objects perform our I/O
    tcp::resolver resolver{ioc};
    websocket::stream<tcp::socket> ws{ioc};

    // Look up the domain name
    auto const results = resolver.resolve(host, port);

    // Make the connection on the IP address we get from a lookup
    net::connect(ws.next_layer(), results.begin(), results.end());

    // Perform the websocket handshake
    ws.handshake(host, "/");

    // Send the message
    ws.write(net::buffer(std::string(text)));

    // This buffer will hold the incoming message
    beast::multi_buffer buffer;

    // Read a message into our buffer
    ws.read(buffer);

    // Close the WebSocket connection
    ws.close(websocket::close_code::normal);

    // If we get here then the connection is closed gracefully

    // The buffers() function helps print a ConstBufferSequence
    std::cout << beast::buffers(buffer.data()) << std::endl;
}
catch(std::exception const& e)
{
    std::cerr << "Error: " << e.what() << std::endl;
    return EXIT_FAILURE;
}
return EXIT_SUCCESS;
}

我在 main 的第一行添加了 cout，但即使是那些也没有在控制台上打印。我试过将它们排除在外，但结果仍然相同。我不确定 (exit value:-1) 是什么意思以及如何前进？

构建成功后的控制台输出：

19:03:28 **** Incremental Build of configuration Debug for project BoostWebSocket **** make all Building file: ../src/BoostWebSocket.cpp Invoking: GCC C++ Compiler g++ -I/usr/local/lib/include -O0 -g3 -c -fmessage-length=0 -std=c++0x -fPIC -pthread -MMD -MP -MF"src/BoostWebSocket.d" -MT"src/BoostWebSocket.d" -o "src/BoostWebSocket.o" "../src/BoostWebSocket.cpp" Finished building: ../src/BoostWebSocket.cpp Building target: BoostWebSocket Invoking: GCC C++ Linker g++ -L/usr/lib -shared -Wl,-soname=libboost_system -pthread -o "BoostWebSocket" ./src/BoostWebSocket.o
Finished building target: BoostWebSocket 19:03:34 Build Finished. 0 errors, 0 warnings. (took 5s.963ms)

按下运行后的控制台输出为空白 (image attached)

Answer 1

这个问题的解决方案是链接

我不得不将 -soname=libboost_system 更改为 -lboost_system

使用 Boost 库的 C++ 代码以退出值 -1 终止（这是什么意思？）

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