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From: Roberto Cm on 7 Jun 2010 17:25
I wanted to take a look at ruby's opengl but I'm having issues -- can
you help me out? I installed it and I can require it in irb or a file
without issue:

irb
001:0> require 'opengl'
true
002:0> include Gl, Glu, Glut
Object


I downloaded the opengl gears demo here:
http://members.shaw.ca/michael.brooks/gears_using_shaders.zip
and this won't run. It errors out with:
ruby: symbol lookup error:
/usr/lib/ruby/gems/1.9.3dev/gems/ruby-opengl-0.60.1/lib/glut.so:
undefined symbol: STR2CSTR

ruby -v
ruby 1.9.3dev (2010-05-31 trunk 28108) [powerpc64-linux]
gem specification ruby-opengl|grep -1 version
name: ruby-opengl
version: !ruby/object:Gem::Version
prerelease: false
--
- 1
version: 0.60.1
platform: ruby
...
rubyforge_project: ruby-opengl
rubygems_version: 1.3.7
signing_key:
specification_version: 2
summary: OpenGL Interface for Ruby
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From: Roberto Cm on 7 Jun 2010 17:30
I wrote:
> I downloaded the opengl gears demo here:
> http://members.shaw.ca/michael.brooks/gears_using_shaders.zip

I'm sorry that's the wrong gears demo link ..
http://aspn.activestate.com/ASPN/Mail/Message/ruby-talk/2574414
--
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From: Joel VanderWerf on 7 Jun 2010 17:31
Roberto Cm wrote:
> I wanted to take a look at ruby's opengl but I'm having issues -- can
> you help me out? I installed it and I can require it in irb or a file
> without issue:
>
> irb
> 001:0> require 'opengl'
> true
> 002:0> include Gl, Glu, Glut
> Object
>
>
> I downloaded the opengl gears demo here:
> http://members.shaw.ca/michael.brooks/gears_using_shaders.zip
> and this won't run. It errors out with:
> ruby: symbol lookup error:
> /usr/lib/ruby/gems/1.9.3dev/gems/ruby-opengl-0.60.1/lib/glut.so:
> undefined symbol: STR2CSTR

Try installing and running it with ruby 1.8.x. The STR2CSTR macro is not
used in 1.9.2, so it looks like someone will have to update the opengl lib.

From: Roberto Cm on 7 Jun 2010 17:58
Joel VanderWerf wrote:
> Roberto Cm wrote:
>>
>> I downloaded the opengl gears demo here:
>> http://members.shaw.ca/michael.brooks/gears_using_shaders.zip
>> and this won't run. It errors out with:
>> ruby: symbol lookup error:
>> /usr/lib/ruby/gems/1.9.3dev/gems/ruby-opengl-0.60.1/lib/glut.so:
>> undefined symbol: STR2CSTR
>
> Try installing and running it with ruby 1.8.x. The STR2CSTR macro is not
> used in 1.9.2, so it looks like someone will have to update the opengl
> lib.
that's a shame ...

I can confirm it does work, although very slowly, in 1.8. thanks
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