可可熊的窝

先给出libev的主页http://software.schmorp.de/pkg/libev.html，libev是一个高性能的事件驱动模型，与libevent类似，不过设计更为小巧，简洁。

libevent有成功的应用–memcached，libev是一个比较新的项目，代码比较少，所以这几天来研究下这个。

首先从CVS中下载最新的代码：

cvs -z3 -d :pserver:anonymous@cvs.schmorp.de/schmorpforge co libev

CVS代码中有autogen.sh文件，执行该文件会生成configure，我机子上出了点问题，需要首先运行

automake –add-missing

然后就是./configure && make && make install 了。
安装好后会有一个提示：

Libraries have been installed in:
/usr/local/lib

If you ever happen to want to link against installed libraries
in a given directory, LIBDIR, you must either use libtool, and
specify the full pathname of the library, or use the `-LLIBDIR’
flag during linking and do at least one of the following:
– add LIBDIR to the `LD_LIBRARY_PATH’ environment variable
during execution
– add LIBDIR to the `LD_RUN_PATH’ environment variable
during linking
– use the `-Wl,–rpath -Wl,LIBDIR’ linker flag
– have your system administrator add LIBDIR to `/etc/ld.so.conf’

See any operating system documentation about shared libraries for
more information, such as the ld(1) and ld.so(8) manual pages.

需要注意一下，因为默认这个库安装在了/usr/local/lib/里，所以运行程序时有可能会提示找不到libev.so这个动态库。我们需要在编译时加上-LLIBDIR参数，然后设置LD_RUN_PATH这个环境变量。

安装好为了测试libev，可以使用lighttz，其实我是从这里知道的libev，下载C文件，使用下面的命令来编译：

LD_RUN_PATH=/usr/local/lib/
export LD_RUN_PATH
gcc -LLIBDIR -o lighttz lighttz.c -lev