编译安装PDO_MYSQL拓展模块，总是提示
In file included from /data0/software/PDO_MYSQL-1.0.2/pdo_mysql.c:31:
/data0/software/PDO_MYSQL-1.0.2/php_pdo_mysql_int.h:25:19: error: mysql.h: No such file or directory
In file included from /data0/software/PDO_MYSQL-1.0.2/pdo_mysql.c:31:
/data0/software/PDO_MYSQL-1.0.2/php_pdo_mysql_int.h:36: error: expected specifier-qualifier-list before ‘MYSQL’
/data0/software/PDO_MYSQL-1.0.2/php_pdo_mysql_int.h:48: error: expected specifier-qualifier-list before ‘MYSQL_FIELD’
/data0/software/PDO_MYSQL-1.0.2/php_pdo_mysql_int.h:53: error: expected specifier-qualifier-list before ‘MYSQL_RES’
make: *** [pdo_mysql.lo] Error 1
这是因为这是因为在编译时需要 MySQL 的头的文件。而它按默认搜索找不到头文件的位置，所以才出现这个问题。通过软连接把MySQL头文件对应到/usr/local/include/下就好
比如你的MySQL安装文件位于/usr/local/mysql，那么就执行以下命令：
# ln -s /usr/local/mysql/include/* /usr/local/include/