wget http://download.zeromq.org/zeromq-4.0.4.tar.gz

$ tar zvxf zeromq-4.0.4.tar.gz
$ mv zeromq-4.0.4 zeromq
$ cd zeromq

$ yum install libtool
$ ./autogen.sh 

$ ./configure
......
checking for gcc... no
checking for cc... no
checking for cl.exe... no
configure: error: in `/home/chuser/zeromq':
configure: error: no acceptable C compiler found in $PATH
See `config.log' for more details

$ sudo yum install gcc

$ ./configure
......
checking whether the C++ compiler works... no
configure: error: Unable to find a working C++ compiler

$ sudo yum install gcc-c++ 

$ ./configure
$ make
$ sudo make install

# 对于 CentOS 8，请以根用户 root 运行下面命令：
cd /etc/yum.repos.d/
wget https://download.opensuse.org/repositories/network:messaging:zeromq:release-stable/CentOS_8/network:messaging:zeromq:release-stable.repo
yum install zeromq-devel

# 对于 CentOS 7，请以根用户 root 运行下面命令：
cd /etc/yum.repos.d/
wget https://download.opensuse.org/repositories/network:messaging:zeromq:release-stable/CentOS_7/network:messaging:zeromq:release-stable.repo
yum install zeromq-devel

# 对于 CentOS 6，请以根用户 root 运行下面命令：
cd /etc/yum.repos.d/
wget https://download.opensuse.org/repositories/network:messaging:zeromq:release-stable/CentOS_6/network:messaging:zeromq:release-stable.repo
yum install zeromq-devel

#include <zmq.h>
#include <stdio.h>
#include <unistd.h>
#include <string.h>
#include <assert.h>

int main (void)
{
    //  Socket to talk to clients
    void *context = zmq_ctx_new ();
    void *responder = zmq_socket (context, ZMQ_REP);
    int rc = zmq_bind (responder, "tcp://*:5555");
    assert (rc == 0);

    while (1) {
        char buffer [10];
        zmq_recv (responder, buffer, 10, 0);
        printf ("Received Hello\n");
        sleep (1);          //  Do some 'work'
        zmq_send (responder, "World", 5, 0);
    }
    return 0;
}

Copy
#include <zmq.h>
#include <string.h>
#include <stdio.h>
#include <unistd.h>

int main (void)
{
    printf ("Connecting to hello world server…\n");
    void *context = zmq_ctx_new ();
    void *requester = zmq_socket (context, ZMQ_REQ);
    zmq_connect (requester, "tcp://localhost:5555");

    int request_nbr;
    for (request_nbr = 0; request_nbr != 10; request_nbr++) {
        char buffer [10];
        printf ("Sending Hello %d…\n", request_nbr);
        zmq_send (requester, "Hello", 5, 0);
        zmq_recv (requester, buffer, 10, 0);
        printf ("Received World %d\n", request_nbr);
    }
    zmq_close (requester);
    zmq_ctx_destroy (context);
    return 0;
}

gcc libzmq_server.c -o libzmq_server -lzmq
gcc libzmq_client.c -o libzmq_client -lzmq

$ ./libzmq_server
Received Hello
Received Hello
Received Hello
Received Hello
Received Hello
Received Hello
Received Hello
Received Hello
Received Hello
Received Hello

$ ./libzmq_client
Connecting to hello world server…
Sending Hello 0…
Received World 0
Sending Hello 1…
Received World 1
Sending Hello 2…
Received World 2
Sending Hello 3…
Received World 3
Sending Hello 4…
Received World 4
Sending Hello 5…
Received World 5
Sending Hello 6…
Received World 6
Sending Hello 7…
Received World 7
Sending Hello 8…
Received World 8
Sending Hello 9…
Received World 9

$ whereis libzmq.so.3

$ find / -name libzmq.so.3

# cat /etc/ld.so.conf
include ld.so.conf.d/*.conf
# echo "/usr/local/lib">>/etc/ld.so.conf
# ldconfig

# vi ~/.bash_profile 

export LD_LIBRARY_PATH=/usr/local/lib/:$LD_LIBRARY_PATH

# source ~/.bash_profile