Installing the mysql Ruby gem
While trying to install this gem on Ubuntu 8.04.3 (Hardy) to run a rails app (Redmine), I encountered the following error:
$ sudo gem install mysql
Building native extensions. This could take a while...
ERROR: Error installing mysql:
ERROR: Failed to build gem native extension.
/usr/bin/ruby1.8 extconf.rb
extconf.rb:1:in `require': no such file to load -- mkmf (LoadError)
from extconf.rb:1
Building native extensions. This could take a while...
ERROR: Error installing mysql:
ERROR: Failed to build gem native extension.
/usr/bin/ruby1.8 extconf.rb
extconf.rb:1:in `require': no such file to load -- mkmf (LoadError)
from extconf.rb:1
There are a bunch of common errors when installing the mysql gem, so Googling for the solution wasn’t instant. Luckily I found this post which showed the missing package: ruby1.8-dev.
Solution
sudo apt-get install ruby1.8-dev
and the MySQL gem installed fine.
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