按照下面的步骤能成功，亲测。转帖，做笔记
编译php-5.5-6的mysql支持，出现Cannot find MySQL header files under /usr/include/mysql. Note that the MySQL client library is not bundled anymore!错误！解决方法如下：
[root@localhost php-5.5.6]# ./configure --prefix=/usr/local/php --with-config-file-path=/usr/local/php/etc --with-mysql=/usr/include/mysql --with-mysqli=/usr/bin/mysql_config --with-iconv-dir --with-freetype-dir=/data/apps/libs --with-jpeg-dir=/data/apps/libs --with-png-dir=/data/apps/libs --with-zlib --with-libxml-dir=/usr --enable-xml --disable-rpath --enable-bcmath --enable-shmop --enable-sysvsem --enable-inline-optimization --with-curl --enable-mbregex --enable-fpm --enable-mbstring --with-mcrypt=/data/apps/libs --with-gd --enable-gd-native-ttf --with-openssl --with-mhash --enable-pcntl --enable-sockets --with-xmlrpc --enable-zip --enable-soap --enable-opcache --with-pdo-mysql --enable-maintainer-zts
checking for string.h... (cached) yes
checking for strings.h... (cached) yes
checking for unistd.h... (cached) yes
checking for sys/time.h... (cached) yes
checking sys/times.h usability... yes
checking sys/times.h presence... yes
checking for sys/times.h... yes
checking for stdarg.h... (cached) yes
checking size of int... (cached) 4
checking size of short... (cached) 2
checking size of long... (cached) 4
checking for an ANSI C-conforming const... yes
checking whether time.h and sys/time.h may both be included... yes
checking for working alloca.h... (cached) yes
checking for alloca... (cached) yes
checking for working memcmp... yes
checking for stdarg.h... (cached) yes
checking for mcrypt support... yes
checking for libmcrypt version... >= 2.5.6
checking for mcrypt_module_open in -lmcrypt... yes
checking for MSSQL support via FreeTDS... no
checking for MySQL support... yes
checking for specified location of the MySQL UNIX socket... no
configure: error: Cannot find MySQL header files under /usr/bin/mysql.
Note that the MySQL client library is not bundled anymore!
[root@localhost php-5.5.6]# find / -name mysql.h
/usr/include/mysql/mysql.h
查找到mysql.h文件，我们更改参数为--with-mysql=/usr，如果没有的话，请安装mysql-devel包，
[root@localhost php-5.5.6]# yum install mysql-devel
重新运行编译命令
[root@localhost php-5.5.6]# ./configure --prefix=/usr/local/php --with-config-file-path=/usr/local/php/etc --with-mysql=/usr --with-mysqli=/usr/bin/mysql_config --with-iconv-dir --with-freetype-dir=/data/apps/libs --with-jpeg-dir=/data/apps/libs --with-png-dir=/data/apps/libs --with-zlib --with-libxml-dir=/usr --enable-xml --disable-rpath --enable-bcmath --enable-shmop --enable-sysvsem --enable-inline-optimization --with-curl --enable-mbregex --enable-fpm --enable-mbstring --with-mcrypt=/data/apps/libs --with-gd --enable-gd-native-ttf --with-openssl --with-mhash --enable-pcntl --enable-sockets --with-xmlrpc --enable-zip --enable-soap --enable-opcache --with-pdo-mysql --enable-maintainer-zts
编译过程省略
......
Generating files
configure: creating ./config.status
creating main/internal_functions.c
creating main/internal_functions_cli.c
+--------------------------------------------------------------------+
| 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.
config.status: creating php5.spec
config.status: creating main/build-defs.h
config.status: creating scripts/phpize
config.status: creating scripts/man1/phpize.1
config.status: creating scripts/php-config
config.status: creating scripts/man1/php-config.1
config.status: creating sapi/cli/php.1
config.status: creating sapi/fpm/php-fpm.conf
config.status: creating sapi/fpm/init.d.php-fpm
config.status: creating sapi/fpm/php-fpm.service
config.status: creating sapi/fpm/php-fpm.8
config.status: creating sapi/fpm/status.html
config.status: creating sapi/cgi/php-cgi.1
config.status: creating ext/phar/phar.1
config.status: creating ext/phar/phar.phar.1
config.status: creating main/php_config.h
config.status: executing default commands
成功啦！编译通过啦！