Centos下安装Ice php扩展
安装ICE的方式有两种，一种下载安装包自己编译，一种是通过yum命令进行安装。
因为Ice需要的包比较多，所以编译安装的话比较麻烦，这里我们就只介绍第二种方式，通过yum安装。以下是官方描述：
The Ice run times and developer kits for all supported language mappings (i386 and x86_64).
You can also install Ice using yum by downloading the repository description (zeroc-ice-amzn1.repo) and installing it in /etc/yum.repos.d. Once installed, you can view the available packages using the following command:
# yum list ice* db53* mcpp-devel
Refer to the EC2 documentation for more information.
yum 安装
首先需要添加一个yum源。
# vi /etc/yum.repos.d/zeroc-ice-amzn.repo
写入：
[zeroc-ice]name=Ice 5 for Amazon Linux $releasever - $basearch
baseurl=http://www.zeroc.com/download/Ice/5/el6/$basearchenabled=1gpgcheck=1gpgkey=http://www.zeroc.com/download/RPM-GPG-KEY-zeroc-release
官网上说可以通过
# yum list ice* db53* mcpp-devel
查看安装包列表。真正的安装命令是
# yum install -y ice* db53* mcpp-devel
安装完成可以通过命令搜索文件所在路径：
# find / -name IcePHP.so
源码安装
我的PHP版本是5.4.23，对应安装的Ice版本为3.5.1。
下载Ice源
# cd /opt
# wget http://www.zeroc.com/download/Ice/3.5/Ice-3.5.1.tar.gz
# wget http://www.zeroc.com/download/Ice/3.5/ThirdParty-Sources-3.5.1.tar.gz
安装依赖库
# yum -y install gcc gcc-c++ expat-devel bzip2 bzip2-devel
# yum -y install openssl*
安装ThirdParty-Sources
# tar xvf ThirdParty-Sources-3.5.1.tar.gz
# cd ThirdParty-Sources-3.5.1
# tar xvf mcpp-2.7.2.tar.gz
# cd mcpp-2.7.2
# patch -p0 < ../mcpp/patch.mcpp.2.7.2
# ./configure CFLAGS=-fPIC --enable-mcpplib --disable-shared
# make && make install
# cd ../
安装BerkeleyDB
# tar zxf db-5.3.21.NC.tar.gz
# cd db-5.3.21.NC
# patch -p0 < ../db/patch.db.5.3.21
# cd build_unix
# ../dist/configure --prefix=/usr --enable-cxx
（说明：db的默认安装prefix路径是/usr/local/BerkeleyDB.5.3，需要改为/usr，否则make Ice时会找不到路径）
# make && make install
安装Ice
# cd /opt
# tar xvf Ice-3.5.1.tar.gz
# cd Ice-3.5.1/cpp
# vi config/Make.tules(默认)
根据环境修改config/Make.rules文件（我这里的安装目录是/opt目录，是ICE默认配置的目录，所以不用修改。）
# make && make install
# cd ../
#
# cd php //安装PHP扩展
# vi config/Make.rules.php
PHP_HOME ?= /usr/local/php (修改为你php安装目录)
# make && make install
源码安装完成之后，会在当前目录生成IcePHP.so文件。
找到IcePHP.so文件后，将这个文件复制到php的扩展目录，然后在php.ini添加该扩展即可。
extension=IcePHP.so
启动PHP的时候如果遇到扩展错误：
PHP Startup: Unable to load dynamic library ‘/usr/local/server/php/lib/php/extensions/no-debug-non-zts-20100525/IcePHP.so’ - libIce.so.35: cannot open shared object file: No such file or directory in Unknown on line 0
这个是因为没加载到Ice的so文件导致的，可以使用ldd命令查看IcePHP.so。
# ldd IcePHP.so
linux-vdso.so.1 => (0x00007fff6c1ff000)
libIce.so.35 => not found
libSlice.so.35 => not found
libIceUtil.so.35 => not found
libstdc++.so.6 => /usr/lib/libstdc++.so.6 (0x00007fdc30e74000)
libm.so.6 => /lib64/libm.so.6 (0x00007fdc30bef000)
libgcc_s.so.1 => /lib64/libgcc_s.so.1 (0x00007fdc309d9000)
libpthread.so.0 => /lib64/libpthread.so.0 (0x00007fdc307bc000)
libc.so.6 => /lib64/libc.so.6 (0x00007fdc30427000)
/lib64/ld-linux-x86-64.so.2 (0x00007fdc314a6000)
这里可以看到，libIce.so这几个文件没有查找到。
# export LD_LIBRARY_PATH=/opt/Ice-3.5.1/lib64
# ldd IcePHP.so
linux-vdso.so.1 => (0x00007fffcd5ff000)
libIce.so.35 => /opt/Ice-3.5.1/lib64/libIce.so.35 (0x00007fc9c20f6000)
libSlice.so.35 => /opt/Ice-3.5.1/lib64/libSlice.so.35 (0x00007fc9c1c76000)
libIceUtil.so.35 => /opt/Ice-3.5.1/lib64/libIceUtil.so.35 (0x00007fc9c19fd000)
libstdc++.so.6 => /usr/lib64/libstdc++.so.6 (0x00007fc9c16ed000)
libm.so.6 => /lib64/libm.so.6 (0x00007fc9c1468000)
libgcc_s.so.1 => /lib64/libgcc_s.so.1 (0x00007fc9c1252000)
libpthread.so.0 => /lib64/libpthread.so.0 (0x00007fc9c1035000)
libc.so.6 => /lib64/libc.so.6 (0x00007fc9c0ca0000)
libbz2.so.1 => /lib64/libbz2.so.1 (0x00007fc9c0a8f000)
libdl.so.2 => /lib64/libdl.so.2 (0x00007fc9c088b000)
librt.so.1 => /lib64/librt.so.1 (0x00007fc9c0682000)
/lib64/ld-linux-x86-64.so.2 (0x00007fc9c2d29000)
2014-10-28添加源码安装。