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