编译的时候正常：
./configure --prefix=/usr/local/mysqli --with-php-config=/usr/local/php/bin/php-config --with-mysqli=/usr/local/mysql/bin/mysql_config
在make的时候报以下错误：
/usr/local/mysql/include/mysql/my_config.h:1147:1: warning: "PACKAGE_VERSION" redefined
In file included from /usr/local/php/include/php/TSRM/tsrm_config.h:1,
from /usr/local/php/include/php/TSRM/tsrm_config_common.h:13,
from /usr/local/php/include/php/TSRM/tsrm_virtual_cwd.h:27,
from /usr/local/php/include/php/main/php.h:401,
from /usr/local/php-5.5.38/ext/mysqli/mysqli_api.c:29:
/usr/local/php/include/php/main/../main/php_config.h:2113:1: warning: this is the location of the previous definition
/usr/local/php-5.5.38/ext/mysqli/mysqli_api.c:36:47: error: ext/mysqlnd/mysql_float_to_double.h: No such file or directory
make: *** [mysqli_api.lo] Error 1
解决方法：
修改 vim /usr/local/php-5.5.38/ext/mysqli/mysqli_api.c文件
将#include "ext/mysqlnd/mysql_float_to_double.h" 修改为绝对路径：
#include "/usr/local/php-5.5.38/ext/mysqlnd/mysql_float_to_double.h"
