安装php mysqli扩展无需安装mysql服务器

在我的linux服务器上，我从源代码安装了php v5.2.14，而没有安装mysql和apache。由于这台服务器只用于运行phpunit，所以没有必要安装mysql和apache。问题是一些单元测试需要mysql扩展。所以，我尝试使用php源代码中的代码安装mysqli扩展。然而，当执行'。/configure'，它停止了:

checking for egrep... grep -E
checking for a sed that does not truncate output... /usr/bin/sed
checking for cc... cc
checking for C compiler default output file name... a.out
checking whether the C compiler works... yes
checking whether we are cross compiling... no
checking for suffix of executables...
checking for suffix of object files... o
checking whether we are using the GNU C compiler... yes
checking whether cc accepts -g... yes
checking for cc option to accept ANSI C... none needed
checking how to run the C preprocessor... cc -E
checking for icc... no
checking for suncc... no
checking whether cc understands -c and -o together... yes
checking for system library directory... lib
checking if compiler supports -R... no
checking if compiler supports -Wl,-rpath,... yes
checking build system type... x86_64-unknown-linux-gnu
checking host system type... x86_64-unknown-linux-gnu
checking target system type... x86_64-unknown-linux-gnu
checking for PHP prefix... /home/pu/php
checking for PHP includes... -I/home/pu/php/include/php -I/home/pu/php/include/php/main -I/home/pu/php/include/php/TSRM -I/home/pu/php/include/php/Zend -I/home/pu/php/include/php/ext -I/home/pu/php/include/php/ext/date/lib
checking for PHP extension directory... /home/pu/php/lib/php/extensions/no-debug-non-zts-20060613
checking for PHP installed headers prefix... /home/pu/php/include/php
checking if debug is enabled... no
checking if zts is enabled... no
checking for re2c... no
configure: WARNING: You will need re2c 0.13.4 or later if you want to regenerate PHP parsers.
checking for gawk... gawk
checking for MySQLi support... yes, shared
checking whether to enable embedded MySQLi support... no
mysql_config not found
configure: error: Please reinstall the mysql distribution

所以我认为它可能缺少mysql导致这个问题。有什么解决办法吗?我不想安装mysql服务器，只安装mysql客户端或驱动程序就足够了。