Tuesday, October 2, 2007

Installing Mongrel on Ubuntu Feisty with rubygems

When I recently re-installed Ubuntu 7.04 (Feisty), I found that I couldn't build the native fastthread gem (a required dependency). If you get this error:

Building native extensions. This could take a while...
extconf.rb:1:in `require': no such file to load -- mkmf (LoadError)
from extconf.rb:1


ERROR: While executing gem ... (RuntimeError)
ERROR: Failed to build gem native extension.
Gem files will remain installed in /var/lib/gems/1.8/gems/fastthread-1.0 for inspection.

then you need the ruby development libraries and the build-essential package. I've found that these commands will make sure mongrel (and rails) is installed correctly:

$ sudo apt-get install ruby1.8-dev rubygems build-essential rails
$ sudo gem install mongrel --include-dependencies

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