ZeroMQ錯誤：未知類型名稱「zctx_t」

Question

我嘗試按照此鏈接中的教程：http://hintjens.com/blog:49安裝ZeroMQ和運行一個簡單的例子如下：

#include <czmq.h> 

int main (void) { 
    zctx_t *ctx = zctx_new(); 
    void *publisher = zsocket_new (ctx, ZMQ_PUB); 
    zsocket_set_curve_server (publisher, true); 
    puts ("Hello, Curve!"); 
    zctx_destroy (&ctx); 
    return 0; 
} 

不過，我得到這個錯誤信息：

hello.c: In function ‘main’: 
hello.c:4:5: error: unknown type name ‘zctx_t’ 
    zctx_t *ctx = zctx_new(); 
    ^
hello.c:4:19: warning: initialization makes pointer from integer without a cast [enabled by default] 
    zctx_t *ctx = zctx_new(); 
       ^
hello.c:5:23: warning: initialization makes pointer from integer without a cast [enabled by default] 
    void *publisher = zsocket_new (ctx, ZMQ_PUB); 
        ^

你能幫幫我嗎？ 我使用Ubuntu 14和ZeroMQ與這些命令成功安裝：

git clone git://github.com/jedisct1/libsodium.git 
cd libsodium 
./autogen.sh 
./configure && make check 
sudo make install 
sudo ldconfig 
cd .. 

git clone git://github.com/zeromq/libzmq.git 
cd libzmq 
./autogen.sh 
./configure && make check 
sudo make install 
sudo ldconfig 
cd .. 

git clone git://github.com/zeromq/czmq.git 
cd czmq 
./autogen.sh 
./configure && make check 
sudo make install 
sudo ldconfig 
cd .. 

Answer 1

此代碼使用CZMQ API第2，這已過時，V3和V4中（https://github.com/zeromq/czmq/releases/tag/v4.0.0）去除。等效代碼V4的工作將是：

#include <czmq.h> 

int main (void) { 
    zsock_t *publisher = zsock_new (ZMQ_PUB); 
    zsock_set_curve_server (publisher, true); 
    puts ("Hello, Curve!"); 
    zsock_destroy (&publisher); 
    return 0; 
} 

您可以在https://github.com/zeromq/czmq/tree/master/examples/security找到所有樣品的現代化版本。