I now have - thanks to the help of many readers of this mailing list -
Ruby 1.8.5 and gem 0.9.3 for both Cygwin and Windows.
Under Cygwin, however, ruby doesn’t seem to make use of the installed
~/tmp $ ruby -rubygem t2.rb
ruby: no such file to load – ubygem (LoadError)
Under pure Windows, it works fine.
Any idea why this happens? Note that under Cygwin, I use the Ruby
which I can load via the Cygwin setup program.