server:~# gem install -y mysql
Select which gem to install for your platform (i486-linux)
1. mysql 2.7.3 (mswin32)
2. mysql 2.7.1 (mswin32)
3. mysql 2.7 (ruby)
4. mysql 2.6 (ruby)
5. Skip this gem
6. Cancel installation
> 3
Building native extensions. This could take a while...
ERROR: While executing gem ... (Gem::Installer::ExtensionBuildError)
ERROR: Failed to build gem native extension.
ruby extconf.rb install -y mysql
extconf.rb:1:in `require': no such file to load -- mkmf (LoadError)
from extconf.rb:1
Gem files will remain installed in /var/lib/gems/1.8/gems/mysql-2.7 for inspection.
Results logged to /var/lib/gems/1.8/gems/mysql-2.7/gem_make.out
-------------------------------------------------------------------------------------
server:~# gem install -y mysql
Select which gem to install for your platform (i486-linux)
1. mysql 2.7.3 (mswin32)
2. mysql 2.7.1 (mswin32)
3. mysql 2.7 (ruby)
4. mysql 2.6 (ruby)
5. Skip this gem
6. Cancel installation
> 4
Building native extensions. This could take a while...
ERROR: While executing gem ... (Gem::Installer::ExtensionBuildError)
ERROR: Failed to build gem native extension.
ruby extconf.rb install -y mysql
extconf.rb:1:in `require': no such file to load -- mkmf (LoadError)
from extconf.rb:1
Gem files will remain installed in /var/lib/gems/1.8/gems/mysql-2.6 for inspection.
Results logged to /var/lib/gems/1.8/gems/mysql-2.6/gem_make.out