gem install mysql error with Xampp

Hello,

I'm trying to install mysql (to use it with Rails 2.2), without any success. After browsing the web, I found some tips (I need to target the xampp files), but it's still not working finally.

My command line is the following : sudo gem install mysql -- --with-mysql-dir=/Applications/xampp/xamppfiles/ --with-mysql-config=/Applications/xampp/xamppfiles/bin/mysql_config

Results : Building native extensions. This could take a while... ERROR: Error installing mysql:   ERROR: Failed to build gem native extension.

/System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/bin/ruby extconf.rb install mysql -- --with-mysql-dir=/Applications/xampp/xamppfiles/ --with-mysql-config=/Applications/xampp/xamppfiles/bin/mysql_config checking for mysql_ssl_set()... yes checking for mysql.h... no checking for mysql/mysql.h... no *** extconf.rb failed *** Could not create Makefile due to some reason, probably lack of necessary libraries and/or headers. Check the mkmf.log file for more details. You may need configuration options.

Provided configuration options:   --with-opt-dir   --without-opt-dir   --with-opt-include   --without-opt-include=${opt-dir}/include   --with-opt-lib   --without-opt-lib=${opt-dir}/lib   --with-make-prog   --without-make-prog   --srcdir=.   --curdir   --ruby=/System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/bin/ruby   --with-mysql-config

Gem files will remain installed in /Library/Ruby/Gems/1.8/gems/mysql-2.7 for inspection. Results logged to /Library/Ruby/Gems/1.8/gems/mysql-2.7/gem_make.out

Do I have to install something else ? I found a developer package in Xampp website, but I don't know if I have to use it and how to use it... http://www.apachefriends.org/en/xampp-macosx.html#849

Anyone could help me?

Thank you very much. Vincent