1.错误信息...................如下
checking for mcrypt support... no
checking for mhash support... no
checking whether to include mime_magic support... no
checking for MING support... no
checking for mSQL support... no
checking for MSSQL support via FreeTDS... no
checking for MySQL support... yes
checking for specified location of the MySQL UNIX socket... /tmp/mysql.sock
checking for MySQL UNIX socket location... /tmp/mysql.sock
checking for mysql_close in -lmysqlclient... no
checking for mysql_error in -lmysqlclient... no
configure: error: mysql configure failed. Please check config.log for more information.

2.解决方法:
如果是自己选择GZ包安装的MYSQL。这里要加路径。
加的方法为--with-mysql-dir=/user/local/mysql
切记不可写为：--with-mysql=/user/local/mysql

a、checking lex output file root... ./configure: line 2425: lex: command not found
configure: error: cannot find output from lex; giving up
缺少flex-2.5.4a-29.i386.rpm，从linux 9.0光盘中找到flex-2.5.4a-29.i386.rpm，安装，重新编译php，ok.