How to use “mysql2” gem in Rails 3 application on Windows 7?

Question

I try to install the mysql2 gem on Windows 7 32-bit.

I run:

gem install mysql2

and I get the following error:

Answer 1

THANK YOU! One note: I had to include the --platform=ruby option as well. Thus, the final entire command line was:

gem install mysql2 --platform=ruby -- '--with-mysql-lib="c:\mysql-gem-install\lib\opt" --with-mysql-include="c:\mysql-gem-install\include"'

When I tried it without the platform=ruby option, DevKit didn't run and it just installed the normal mysql2 gem - it even gave a warning message about mysql2 being built for 6.0.2. I uninstalled it (gem uninstall mysql2), then ran it again with --platform=ruby and it worked awesome!

Me: Windows 7 64bit, Ruby 1.9.3p125, Rails 3.2.1, MySQL 5.1.56