gruff and rbgsl conflict

I cannot get the server running with gruff and rbgsl together.

require 'gruff'
require 'rbgsl'

If I have these two in either environment.rb or anywhere else the
server quits with the following. The server runs fine with either one.

=> Booting Mongrel (use 'script/server webrick' to force WEBrick)
=> Rails application starting on http://0.0.0.0:3000
=> Call with -d to detach
=> Ctrl-C to shutdown server
** Starting Mongrel listening at 0.0.0.0:3000
** Starting Rails with development environment...
dyld: ruby multiple definitions of symbol _ID_call
/usr/local/lib/ruby/gems/1.8/gems/rmagick-1.15.2/lib/RMagick.bundle
definition of _ID_call
/usr/local/lib/ruby/site_ruby/1.8/powerpc-darwin7.9.0/rb_gsl.bundle
definition of _ID_call
Trace/BPT trap

The server configuration is:
ruby 1.8.5 (2006-12-25 patchlevel 12) [powerpc-darwin7.9.0]
Rails 1.2.2
mongrel-1.0.1

This problem has nothing to do with rails, the RMagick.bundle and
gsl.bundle cannot load together. Is there a way to load the modules
only when I need the them?

This problem can be resolved by applying a patch to RMagic and
recompiling. You can get the patch at rubyforge.