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Ideally, you want to make a static binary, otherwise the dynamiclinker pollutes your address space with shared libs right in themiddle. (NOTE: actually, this shouldn't matter so much anymore, nowthat we only allocate huge, fixed-size slabs)Make sure your libevent has epoll (Linux) or kqueue (BSD) support.Using poll or select only is slow, and works for testing, butshouldn't be used for high-traffic memcache installations.To build libevent with epoll on Linux, you need two things. First,you need /usr/include/sys/epoll.h . To get it, you can install theuserspace epoll library, epoll-lib. The link to the latest versionis buried insidehttp://www.xmailserver.org/linux-patches/nio-improve.html ; currentlyit's http://www.xmailserver.org/linux-patches/epoll-lib-0.9.tar.gz .If you're having any trouble building/installing it, you can just copyepoll.h from that tarball to /usr/include/sys as that's the only thingfrom there that libevent really needs.Secondly, you need to declare syscall numbers of epoll syscalls, solibevent can use them. Put these declarations somewhereinside <sys/epoll.h>:#define __NR_epoll_create 254#define __NR_epoll_ctl 255#define __NR_epoll_wait 256After this you should be able to build libevent with epoll support.Once you build/install libevent, you don't need <sys/epoll.h> tocompile memcache or link it against libevent. Don't forget that for epollsupport to actually work at runtime you need to use a kernel with epollsupport patch applied, as explained in the README file.BSD users are luckier, and will get kqueue support by default.