ubuntu server 18.04 安装zmq

安装依赖

sudo apt-get install libtool pkg-config build-essential autoconf automake

编译安装ZMQ使用的加密库

sudo wget https://download.libsodium.org/libsodium/releases/LATEST.tar.gz
sudo tar -zxvf LATEST.tar.gz
cd libsodium-stable
./configure
make
make check
sudo make install

编译安装libzmq（去官网抄袭）

echo "deb http://download.opensuse.org/repositories/network:/messaging:/zeromq:/release-stable/Debian_9.0/ ./" >> /etc/apt/sources.list
wget https://download.opensuse.org/repositories/network:/messaging:/zeromq:/release-stable/Debian_9.0/Release.key -O- | sudo apt-key add
apt-get install libzmq3-dev

ubuntu 18.04 遇到问题

error: ‘zmq::send_flags’ has not been declared

参考一些文章

How to address the problme: “build error: ‘zmq::recv_flags’ has not been declared“_Drscq的博客-优快云博客

waf build error: ‘zmq::recv_flags’ has not been declared · Issue #33 · tkn-tub/ns3-gym · GitHub

用以下方法解决

sudo apt-add-repository "deb http://in.archive.ubuntu.com/ubuntu/ focal-updates main restricted universe multiverse"
sudo apt-add-repository "deb-src http://in.archive.ubuntu.com/ubuntu/ focal-updates main restricted universe multiverse"
sudo apt-add-repository "deb http://archive.ubuntu.com/ubuntu focal main universe restricted multiverse"
sudo apt-add-repository "deb-src http://archive.ubuntu.com/ubuntu focal restricted universe multiverse main"
sudo apt-get update
sudo apt-get install libzmq3-dev

官方代码和构建命令

//  server.cpp
//  Hello World server in C++
//  Binds REP socket to tcp://*:5555
//  Expects "Hello" from client, replies with "World"
//
#include <zmq.hpp>
#include <string>
#include <iostream>
#ifndef _WIN32
#include <unistd.h>
#else
#include <windows.h>

#define sleep(n)	Sleep(n)
#endif

int main () {
    //  Prepare our context and socket
    zmq::context_t context (2);
    zmq::socket_t socket (context, zmq::socket_type::rep);
    socket.bind ("tcp://*:5555");

    while (true) {
        zmq::message_t request;

        //  Wait for next request from client
        socket.recv (request, zmq::recv_flags::none);
        std::cout << "Received Hello" << std::endl;

        //  Do some 'work'
        sleep(1);

        //  Send reply back to client
        zmq::message_t reply (5);
        memcpy (reply.data (), "World", 5);
        socket.send (reply, zmq::send_flags::none);
    }
    return 0;
}

//  client.cpp
//  Hello World client in C++
//  Connects REQ socket to tcp://localhost:5555
//  Sends "Hello" to server, expects "World" back
//
#include <zmq.hpp>
#include <string>
#include <iostream>

int main ()
{
    //  Prepare our context and socket
    zmq::context_t context (1);
    zmq::socket_t socket (context, zmq::socket_type::req);

    std::cout << "Connecting to hello world server..." << std::endl;
    socket.connect ("tcp://localhost:5555");

    //  Do 10 requests, waiting each time for a response
    for (int request_nbr = 0; request_nbr != 10; request_nbr++) {
        zmq::message_t request (5);
        memcpy (request.data (), "Hello", 5);
        std::cout << "Sending Hello " << request_nbr << "..." << std::endl;
        socket.send (request, zmq::send_flags::none);

        //  Get the reply.
        zmq::message_t reply;
        socket.recv (reply, zmq::recv_flags::none);
        std::cout << "Received World " << request_nbr << std::endl;
    }
    return 0;
}

g++ server.cpp -lzmq -o server
g++ client.cpp -lzmq -o client

完全照搬这篇文章也没问题

Linux下ZMQ的安装_zmq安装_Coder个人博客的博客-优快云博客

使用cmake
 

cmake_minimum_required(VERSION 3.14.1)

project(onlineapp)

if(CMAKE_COMPILER_IS_GNUCC)
    message("COMPILER IS GNUCC")
        ADD_DEFINITIONS ( -std=c++11 )
endif(CMAKE_COMPILER_IS_GNUCC)

SET(CMAKE_CXX_FLAGS_DEBUG "$ENV{CXXFLAGS} -O0 -Wall -ggdb3")
#SET(CMAKE_CXX_FLAGS_RELEASE "$ENV{CXXFLAGS} -O3 -Wall")

# 5. 添加头文件路径
# include_directories(${CMAKE_CURRENT_SOURCE_DIR}/inc)
# include_directories(${CMAKE_SOURCE_DIR}/include)
# include_directories(${CMAKE_SOURCE_DIR}/soc_com_mgr/inc)
# 6. 添加源文件
FILE(GLOB_RECURSE SOURCE_FILES ${CMAKE_CURRENT_SOURCE_DIR}/*.cpp)
message(${CMAKE_CURRENT_SOURCE_DIR})
message(${SOURCE_FILES})
# 7. 添加链接库
find_package(cppzmq)

# 9. 设置环境变量，编译用到的源文件全部都要放到这里，否则编译能够通过，
#但是执行的时候会出现各种问题，比如"symbol lookup error xxxxx , undefined symbol"
SET(ALL_SRCS ${SOURCE_FILES})
message(${ALL_SRCS})

# 10.add executable file，添加要编译的可执行文件
ADD_EXECUTABLE(server server.cpp)
ADD_EXECUTABLE(client client.cpp)

# 不可以
#TARGET_LINK_LIBRARIES(${CMAKE_BINARY_DIR}/module/libmodule.so)
target_link_libraries(server cppzmq)
target_link_libraries(client cppzmq)