[libev]error while loading shared libraries: libev.so.4

        用./configure、make、make install安装完libev后，写一个简单程序server.c，编译，gcc server.c -o server lev。

产生如下错误：error while loading shared libraries: libev.so.4: cannot open shared object file: No such file or directory

        解决方案：

在安装libev时，configure要指定安装路径，./configure --prefix=/usr，然后make && make install，不然默认安装在/usr/local/lib中，搜索路径搜不到