今天编译PHP的时候遇到了几个错误，记录一下
第一次编译的时候报错如下：
configure: error: mcrypt.h not found. Please reinstall libmcrypt.

报这个错是因为没有安装libmcrypt这个包，下载地址如下：
wget ftp://mcrypt.hellug.gr/pub/crypto/mcrypt/attic/libmcrypt/libmcrypt-2.5.7.tar.gz

安装：
[root@localhost app]# tar zxfv libmcrypt-2.5.7.tar.gz
[root@localhost app]# cd libmcrypt-2.5.7
[root@localhost app]# ./configure
[root@localhost app]# make ; make install

重新编译php
[root@localhost app]# cd php-5.3.28
[root@localhost php-5.3.28]# ./configure --prefix=/usr/local/php5 --with-config-file-path=/usr/local/php5/etc --with-mysql=/usr/local/mysql --with-mysqli=/usr/bin/mysql_config --with-mysql-sock=/var/lib/mysql/mysql.sock --with-gd --with-iconv  --with-zlib  --enable-xml --enable-magic-quotes --enable-safe-mode --enable-bcmath --enable-shmop --enable-sysvsem --enable-inline-optimization --with-curlwrappers --enable-mbregex  --enable-fpm --enable-mbstring --enable-ftp --enable-gd-native-ttf --with-openssl --enable-pcntl --enable-sockets --with-xmlrpc --enable-zip --enable-soap --without-pear --with-gettext --enable-session --with-mcrypt --with-curl

第二次编译报错如下：
configure: error: Cannot find libmysqlclient under /usr.
Note that the MySQL client library is not bundled anymore!

这个错误时因为在64位的linux系统中，libmysqlclient 默认安装到了 /usr/lib64/mysql/ 目录下，但是php编译时，要去/usr/lib目录下查找
解决办法：在/usr/lib目录下创建一个软连接
[root@localhost php-5.3.28]# ls /usr/lib64/mysql/libmysqlclient*
/usr/lib64/mysql/libmysqlclient_r.so     /usr/lib64/mysql/libmysqlclient_r.so.16.0.0  /usr/lib64/mysql/libmysqlclient.so.16
/usr/lib64/mysql/libmysqlclient_r.so.16  /usr/lib64/mysql/libmysqlclient.so           /usr/lib64/mysql/libmysqlclient.so.16.0.0

[root@localhost php-5.3.28]# ln -s /usr/lib64/mysql/libmysqlclient.so.16 /usr/lib/libmysqlclient.so

最后编译成功：
+--------------------------------------------------------------------+
| License:                                                           |
| This software is subject to the PHP License, available in this     |
| distribution in the file LICENSE.  By continuing this installation |
| process, you are bound by the terms of this license agreement.     |
| If you do not agree with the terms of this license, you must abort |
| the installation process at this point.                            |
+--------------------------------------------------------------------+

Thank you for using PHP.