[MacRuby-devel] symbol not found: _rb_str_freeze

Steve Clarke steve at sclarkes.me.uk
Wed Nov 16 09:29:18 PST 2011

Hi Jean-Denis,

I can't answer your question directly but I may be able to help a bit. I also want to use mysql with `MacRuby.  I tried mysql gem version 2.8.1 and hit problems I couldn't work around.  I also tried ruby-mysql 2.9.4.  I did get that to work after some mods, but it was very slow to load and didn't seem totally reliable.

I then decided to use an Objective-C framework that accesses SQL.  Sequel Pro contains such a framework called MCPKit and it's open source.  This means no gems so it loads v quickly.  However, the version of MCPKit that I downloaded had manual memory management so wouldn't link with a MacRuby app.  I don't know much about Objective-C but I thought I would just try recompiling MCPKit with ARC and garbage collection.  To my surprise and delight it worked.  I'm afraid I don't know how robust this approach is likely to be.  Maybe I've just been lucky.  It would be interesting to hear from someone who understands memory management better than me.


On 16 Nov 2011, at 15:33, Jean-Denis MUYS wrote:

> Hi,
> I have a big showstopper with my app: sequel with the mysql gem fails with the following error message:
> dyld: Symbol not found: _rb_str_freeze
> Referenced from: /Library/Frameworks/MacRuby.frameword/[…]/mysql_api.bundle
> This is mentioned on the net on the sequel project back in february. The diagnostic of the sequel developer was that this is a bug in MacRuby.
> I am using MacRuby nightly latest as of November 17, 2011, which reports its version as 0.12
> I have mysql gem version 2.8.1
> I have sequel gem version 3.29.0
> Steps to reproduce in macirb:
> 	require 'ruby gems'
> 	require 'sequel'
> 	DB = Sequel.connect(:adapter => 'mysql', :user => 'root', :host => 'localhost', :database => 'test', :password => 'your password')
> 	DB.tables
> Is there any workaround/ easy fix?
> I would appreciate any suggestion, including of alternate gems to use.
> Jean-Denis
> _______________________________________________
> MacRuby-devel mailing list
> MacRuby-devel at lists.macosforge.org
> http://lists.macosforge.org/mailman/listinfo.cgi/macruby-devel

More information about the MacRuby-devel mailing list