centos php安装memcached模块
安装所要软件wget http://launchpad.net/libmemcached/1.0/0.42/+download/libmemcached-0.42.tar.gz
wget http://pecl.php.net/get/memcached-1.0.2.tgz
memcached的官方网站 http://www.memcached.org/
安装libmemcached
tar zxvf libmemcached-0.42.tar.gz
cd libmemcached-0.42
./configure –-prefix=/usr/local/libmemcached –-with-memcached
make && make install
安装要注意的问题：
1， 安装过程中不要忘了，–with-memcached，不然会提示你
checking for memcached… no
configure: error: “could not find memcached binary”
2，你的memcached是不是1.2.4以上的，如果不是会提示你
clients/ms_thread.o: In function `ms_setup_thread’:
/home/zhangy/libmemcached-0.42/clients/ms_thread.c:225: undefined reference to `__sync_fetch_and_add_4′
clients/ms_thread.o:/home/zhangy/libmemcached-0.42/clients/ms_thread.c:196: more undefined references to `__sync_fetch_and_add_4′ follow
collect2: ld returned 1 exit status
make: *** Error 1
make: Leaving directory `/home/zhangy/libmemcached-0.42′
解决办法是–disable-64bit LAGS=”-O3 -march=i686″，
最好的方法是换个版本的软件
https://launchpad.net/libmemcached/1.0/0.51/+download/libmemcached-0.51.tar.gz
./configure --prefix=/usr/local/libmemcached --with-memcached
如果不用这个64位的long型数据，我想php扩展memcached，memcache也就没什么区别了，装memcached也就没什么意思了。
php的扩展memcached的安装
tar zxvf memcached-1.0.2.tar.gz
cd memcached-1.0.2
/usr/local/php/bin/phpize
./configure --with-memcached -with-php-config=/usr/local/php/bin/php-config --with-libmemcached-dir=/usr/local/libmemcached --enable-memcached
make && make install
vi /usr/local/php/lib/php.ini
加上extension=memcached.so重起一下服务就可以了。
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