加载共享库时出错：libevent-1.4.so.2：无法打开共享对象文件：

Question

我正在使用libevent进行程序，我在两台计算机A和B上编译我的程序，在A上执行成功，但是在B上我遇到了以下错误：

error while loading shared libraries: libevent-1.4.so.2: cannot open shared object file: No such file or directory

供参考：

A和B都带有fedora系统，在A和B上，我下载了libevent-1.4.14b-stable.tar.gz，并通过configure / make / make install安装它。

在A上

    [esolve@kitty temp]$ uname -r
    3.6.10-2.fc16.x86_64
    [esolve@kitty temp]$ ls -al /usr/local/lib64 | grep libevent
    [esolve@kitty temp]$ ls -al /usr/lib64 | grep libevent
    [esolve@kitty temp]$ ls -al /usr/lib | grep libevent
    lrwxrwxrwx   1 root root       32 May 21 00:25 libevent-1.4.so.2 -> /usr/local/lib/libevent-1.4.so.2
    [esolve@kitty temp]$ ls -al /usr/local/lib | grep libevent
    lrwxrwxrwx   1 root root     21 May 21 00:22 libevent-1.4.so.2 -> libevent-1.4.so.2.2.0
    -rwxr-xr-x   1 root root 435304 May 21 00:22 libevent-1.4.so.2.2.0
    -rw-r--r--   1 root root 793178 May 21 00:22 libevent.a
    lrwxrwxrwx   1 root root     26 May 21 00:22 libevent_core-1.4.so.2 -> libevent_core-1.4.so.2.2.0
    -rwxr-xr-x   1 root root 160352 May 21 00:22 libevent_core-1.4.so.2.2.0
    -rw-r--r--   1 root root 269580 May 21 00:22 libevent_core.a
    -rwxr-xr-x   1 root root    988 May 21 00:22 libevent_core.la
    lrwxrwxrwx   1 root root     26 May 21 00:22 libevent_core.so -> libevent_core-1.4.so.2.2.0
    lrwxrwxrwx   1 root root     27 May 21 00:22 libevent_extra-1.4.so.2 -> libevent_extra-1.4.so.2.2.0
    -rwxr-xr-x   1 root root 342122 May 21 00:22 libevent_extra-1.4.so.2.2.0
    -rw-r--r--   1 root root 631804 May 21 00:22 libevent_extra.a
    -rwxr-xr-x   1 root root    995 May 21 00:22 libevent_extra.la
    lrwxrwxrwx   1 root root     27 May 21 00:22 libevent_extra.so -> libevent_extra-1.4.so.2.2.0
    -rwxr-xr-x   1 root root    953 May 21 00:22 libevent.la
    lrwxrwxrwx   1 root root     21 May 21 00:22 libevent.so -> libevent-1.4.so.2.2.0

在B上：

    root@kitch server_agent]# uname -r
    3.8.5-201.fc18.x86_64
    [root@kitch server_agent]# ls -al /usr/lib | grep libevent
    lrwxrwxrwx   1 root root      32 Jun 14 17:09 libevent-1.4.so.2 -> /usr/local/lib/libevent-1.4.so.2
    [root@kitch server_agent]# ls -al /usr/local/lib | grep libevent
    lrwxrwxrwx   1 root root     21 Jun 14 16:03 libevent-1.4.so.2 -> libevent-1.4.so.2.2.0
    -rwxr-xr-x   1 root root 435524 Jun 14 16:03 libevent-1.4.so.2.2.0
    -rw-r--r--   1 root root 805650 Jun 14 16:03 libevent.a
    lrwxrwxrwx   1 root root     26 Jun 14 16:03 libevent_core-1.4.so.2 -> libevent_core-1.4.so.2.2.0
    -rwxr-xr-x   1 root root 164070 Jun 14 16:03 libevent_core-1.4.so.2.2.0
    -rw-r--r--   1 root root 270748 Jun 14 16:03 libevent_core.a
    -rwxr-xr-x   1 root root    994 Jun 14 16:03 libevent_core.la
    lrwxrwxrwx   1 root root     26 Jun 14 16:03 libevent_core.so -> libevent_core-1.4.so.2.2.0
    lrwxrwxrwx   1 root root     27 Jun 14 16:03 libevent_extra-1.4.so.2 -> libevent_extra-1.4.so.2.2.0
    -rwxr-xr-x   1 root root 339502 Jun 14 16:03 libevent_extra-1.4.so.2.2.0
    -rw-r--r--   1 root root 642916 Jun 14 16:03 libevent_extra.a
    -rwxr-xr-x   1 root root   1001 Jun 14 16:03 libevent_extra.la
    lrwxrwxrwx   1 root root     27 Jun 14 16:03 libevent_extra.so -> libevent_extra-1.4.so.2.2.0
    -rwxr-xr-x   1 root root    959 Jun 14 16:03 libevent.la
    lrwxrwxrwx   1 root root     21 Jun 14 16:03 libevent.so -> libevent-1.4.so.2.2.0
    [root@kitch server_agent]# ls -al /usr/lib64 | grep libevent
    [root@kitch server_agent]# ls -al /usr/local/lib64 | grep libevent

为什么我的程序在B上得到这个错误，是否有任何解决方案？谢谢！

Answer 1

你的“A”系统有一个从/usr/lib/libevent-1.4.so.2到/usr/local/lib/libevent-1.4.so.2的符号链接，但系统“B”没有。有可能，如果你创建它，那么一切都将开始工作。

该命令应如下所示。

sudo ln -s /usr/local/lib/libevent-1.4.so.2 /usr/lib/libevent-1.4.so.2

作为替代方案，您可以通过将/usr/local/lib导出为系统“B”的临时修订，将LD_LIBRARY_PATH=$LD_LIBRARY_PATH:/usr/local/lib添加到您的库路径作为测试。