Libevent 2.0.22 项目编译问题（OSX）

Posted 2023-02-16

【中文标题】Libevent 2.0.22 项目编译问题（OSX）

【英文标题】：Libevent 2.0.22 project Compilation problems (OSX)

【发布时间】：2015-06-22 07:10:56

【问题描述】：

我想编译上面的示例代码，但出现以下错误。 这是什么原因。 “OSX - /usr/local”下安装的所有文件

// libevent2 library
#include <stdio.h>
#include <stdlib.h>
#include <signal.h>
#include <unistd.h>
#include <evhttp.h>
#include <event2/event.h>
#include <event2/http.h>
#include <event2/bufferevent.h>

void generic_handler(struct evhttp_request *req, void *arg) 
    struct evbuffer *buffer;
    buffer = evbuffer_new();

    if (buffer == NULL) 
        err(1, "failed to create response buffer");
    

    evbuffer_add_printf(buffer, "Requested: %sn", evhttp_request_uri(req));
    evhttp_send_reply(req, HTTP_OK, "OK", buffer);


int main(int argc, char **argv) 
    struct evhttp *httpd;
    event_init();
    httpd = evhttp_start("0.0.0.0", 8080);
    // Set a callback for requests to "/specific".
    // evhttp_set_cb(httpd, "/specific", another_handler, NULL);
    // Set a callback for all other requests.
    evhttp_set_gencb(httpd, generic_handler, NULL);
    // Not reached in this code as it is now.
    event_dispatch();
    evhttp_free(httpd);
    return 0;

错误：

/Users/batuhangoksu/Desktop/test.c:14:10: fatal error: 'evhttp.h' file not found
#include <evhttp.h>
                 ^
1 error generated.

命令：

gcc -o octopus /Users/batuhangoksu/Desktop/test.c -levent -lpthread

【参考方案1】：

首先，请找到evhttp.h文件中的path。

然后，您可以通过命令检查此path 是否在#include 文件搜索路径列表中

gcc -o octopus /Users/batuhangoksu/Desktop/test.c -levent -lpthread -v

输出是这样的，

#include "..." search starts here:
#include <...> search starts here:
 /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../lib/clang/6.1.0/include
 /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/include
 /usr/include
 /System/Library/Frameworks (framework directory)
 /Library/Frameworks (framework directory)

如果path不在搜索列表中，则将-I /missed_include（假设它是path）添加到您的命令中，例如

gcc -o 章鱼 /Users/batuhangoksu/Desktop/test.c -levent -lpthread -I /missed_include