Zookeeper issues during libevent development in Linux

 

I developed an httpd demo (linvo_httpd.c) based on an online example. After a series of problems, I tried Google for a long time and finally got to understand it ~

 

 

Environment:

Linux 2.6.18-164. EL5

Libevent-1.4.13

 

 

First, a bunch of errors similar to the following information are reported during GCC compilation.

/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'

It should be caused by the failure to find the compiled libevent library file, which may be caused by path problems.

After the-Levent parameter is added during compilation this time (let it find the event library in the System Library), the compilation passes smoothly

Gcc-wall linvo_httpd.c-O linvo_httpd-Levent

 

./Linvo_httpdRunning ~ I wiped it and came again ....

./Linvo_httpd: Error while loading shared libraries: libevent-1.4.so.2: cannot open shared object file: no such file or directory

The file still cannot be found due to path issues.

Whereis libeventLet's see where my libevent is installed by default.

Libevent:/usr/local/lib/libevent. La/usr/local/lib/libevent. So/usr/local/lib/libevent.

Oh ~ In the/usr/local/lib/directory

 

Ld_debug = libs./linvo_httpd-VLet's see where the demo program found the file.

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:

Let me go ~ If you have found so many places, you should not find the libevent in the directory --!

 

Make a link

Ln-S/usr/local/lib/libevent-1.4.so.2/usr/lib/libevent-1.4.so.2

 

-.-

 

PS: I tried to add -- prefix =/usr/lib/and re-compile libevent to the specified directory, which seems to be invalid .... Why ???