按照网上例子搞了个httpd的小demo（linvo_httpd.c），遇到一连串问题，努力google了半天，终于得解，记录之~
环境：
Linux 2.6.18-164.el5
libevent-1.4.13
首先用gcc编译时候报了类似下面信息的一堆错
/tmp/ccsKVcym.o: In function `main':
linvo_httpd.c:(.text+0xdf): undefined reference to `event_init'
linvo_httpd.c:(.text+0xf3): undefined reference to `evhttp_start'
应该是找不到编译后的libevent库文件所导致，可能是路径问题
这次在编译时加上了-levent参数后（让其到系统库中找event库），顺利编译通过
gcc -Wall linvo_httpd.c -o linvo_httpd -levent
./linvo_httpd 运行之~ 我擦，又来。。。。
./linvo_httpd: error while loading shared libraries: libevent-1.4.so.2: cannot open shared object file: No such file or directory
依然是路径问题找不到文件
whereis libevent 看下我的libevent默认装到哪里了
libevent: /usr/local/lib/libevent.la /usr/local/lib/libevent.so /usr/local/lib/libevent.a
哦~在/usr/local/lib/目录下
LD_DEBUG=libs ./linvo_httpd -v 看下demo程序究竟是到哪里去找的该文件
32372: find library=libevent-1.4.so.2 [0]; searching
32372: search cache=/etc/ld.so.cache
32372: search path=/lib/tls/i686/sse2:/lib/tls/i686:/lib/tls/sse2:/lib/tls:/lib/i686/sse2:/lib/i686:/lib/sse2:/lib:/usr/lib/tls/i686/sse2:/usr/lib/tls/i686:/usr/lib/tls/sse2:/usr/lib/tls:/usr/lib/i686/sse2:/usr/lib/i686:/usr/lib/sse2:/usr/lib (system search path)
32372: trying file=/lib/tls/i686/sse2/libevent-1.4.so.2
32372: trying file=/lib/tls/i686/libevent-1.4.so.2
32372: trying file=/lib/tls/sse2/libevent-1.4.so.2
32372: trying file=/lib/tls/libevent-1.4.so.2
32372: trying file=/lib/i686/sse2/libevent-1.4.so.2
32372: trying file=/lib/i686/libevent-1.4.so.2
32372: trying file=/lib/sse2/libevent-1.4.so.2
32372: trying file=/lib/libevent-1.4.so.2
32372: trying file=/usr/lib/tls/i686/sse2/libevent-1.4.so.2
32372: trying file=/usr/lib/tls/i686/libevent-1.4.so.2
32372: trying file=/usr/lib/tls/sse2/libevent-1.4.so.2
32372: trying file=/usr/lib/tls/libevent-1.4.so.2
32372: trying file=/usr/lib/i686/sse2/libevent-1.4.so.2
32372: trying file=/usr/lib/i686/libevent-1.4.so.2
32372: trying file=/usr/lib/sse2/libevent-1.4.so.2
32372: trying file=/usr/lib/libevent-1.4.so.2
32372:
我勒个去~找了这么多地方，就是没到libevent应该在的目录中去找- -！
做个链接吧
ln -s /usr/local/lib/libevent-1.4.so.2 /usr/lib/libevent-1.4.so.2
这下欧了-.-
PS：我尝试加上--prefix=/usr/lib/把libevent重新编安装到指定目录，貌似无效。。。。Why？？？