Ruby Gems and OSX 10.6 (Snow Leopard)

I recently upgraded to Snow Leopard. I had to fight the urge to install sooner because we had some big projects underway at work and couldn’t afford any downtime.

Due to not having time to do a complete re-install I simply did the upgrade and I must admit I am pretty impressed with how smoothly it went. When I get some more time I’ll do a clean install but I’m happy with things for now.

One of the things I am finding however is that a lot of gems that required native extensions need to be rebuilt. For a number of these things are quite obvious and its just a case of either updating or removing the gem and re-installing.

Autotest however wasn’t quite so obvious. Some gems install dependancies that required rebuilding and its not always 100% obvious like the following:

/Library/Ruby/Gems/1.8/gems/sys-uname-0.8.3/lib/sys/uname.bundle: dlopen(/Library/Ruby/Gems/1.8/gems/sys-uname-0.8.3/lib/sys/uname.bundle, 9): no suitable image found.  Did find: (LoadError)
/Library/Ruby/Gems/1.8/gems/sys-uname-0.8.3/lib/sys/uname.bundle: no matching architecture in universal wrapper - /Library/Ruby/Gems/1.8/gems/sys-uname-0.8.3/lib/sys/uname.bundle
from /Library/Ruby/Site/1.8/rubygems/custom_require.rb:31:in `require'
from /Library/Ruby/Gems/1.8/gems/autotest-fsevent-0.1.1/lib/autotest/fsevent.rb:3
from /Library/Ruby/Site/1.8/rubygems/custom_require.rb:36:in `gem_original_require'
from /Library/Ruby/Site/1.8/rubygems/custom_require.rb:36:in `require'
from /Users/stevesmith/.autotest:2
from /Library/Ruby/Gems/1.8/gems/ZenTest-4.1.3/lib/autotest.rb:195:in `load'
from /Library/Ruby/Gems/1.8/gems/ZenTest-4.1.3/lib/autotest.rb:195:in `initialize'
from /Library/Ruby/Gems/1.8/gems/ZenTest-4.1.3/lib/autotest.rb:194:in `each'
from /Library/Ruby/Gems/1.8/gems/ZenTest-4.1.3/lib/autotest.rb:194:in `initialize'
from /Library/Ruby/Gems/1.8/gems/autotest-rails-4.1.0/lib/autotest/rails.rb:7:in `initialize'
from /Library/Ruby/Gems/1.8/gems/ZenTest-4.1.3/lib/autotest.rb:138:in `new'
from /Library/Ruby/Gems/1.8/gems/ZenTest-4.1.3/lib/autotest.rb:138:in `run'
from /Library/Ruby/Gems/1.8/gems/ZenTest-4.1.3/bin/autotest:55
from /usr/bin/autotest:19:in `load'
from /usr/bin/autotest:19

The gem sys-uname makes use of native extensions but is obviously not reinstalled as autotest is its just assumed to already exist. In this case simply doing

sudo gem uninstall sys-uname
sudo gem install sys-uname

will bring it back. I guess this isn’t the most tricky thing to figure out but I thought I’d post it in case it was of use to anyone.

4 thoughts on “Ruby Gems and OSX 10.6 (Snow Leopard)

  1. Thanks for taking the time to post this. As someone who is fairly new to this Ruby malarky, it saved me a whole heap of pain.

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