php5-安装pdo_mysql扩展中出现报错问题

php5-安装pdo_mysql扩展中出现报错问题：

报错如下：
1.[root@localhost pdo_mysql]# phpize
　Configuring for:
　PHP Api Version: 20090626
　Zend Module Api No: 20090626
　Zend Extension Api No: 220090626
　config.m4:138: warning: AC_CACHE_VAL(pdo_inc_path, ...): suspicious cache-id, must 　　contain _cv_ to be cached
　../../lib/autoconf/general.m4:1974: AC_CACHE_VAL is expanded from...
　../../lib/autoconf/general.m4:1994: AC_CACHE_CHECK is expanded from...
　aclocal.m4:2748: PHP_CHECK_PDO_INCLUDES is expanded from...
　config.m4:138: the top level
　config.m4:138: warning: AC_CACHE_VAL(pdo_inc_path, ...): suspicious cache-id, must 　contain _cv_ to be cached
　../../lib/autoconf/general.m4:1974: AC_CACHE_VAL is expanded from...
　../../lib/autoconf/general.m4:1994: AC_CACHE_CHECK is expanded from...
　aclocal.m4:2748: PHP_CHECK_PDO_INCLUDES is expanded from...
　config.m4:138: the top level

报错原因：
autoconf版本太高造成的
解决方法：
1.yum install autoconf213.noarch
export PHP_AUTOCONF=/usr/bin/autoconf-2.13
export PHP_AUTOHEADER=/usr/bin/autoheader-2.13
2.再次进行安装：
/usr/local/php/bin/phpize
./configure --with-php-config=/usr/local/php/bin/php-config --with-pdo-mysql=/usr/local/mysql
make &&make install

3.修改php.ini文件：
　　　　　extension_dir='/usr/local/php/lib/php/extensions/no-debug-zts-20090626/'
extension=pdo_mysql.so