How do I specify the path for Devkit?
I'm here on Windows 7 x64 and am trying to install Ruby on Rails from scratch. I just installed the RubyInstaller 1.9.3-p429 and now just ran the DevKit-tdm-32-4.5.2-20111229-1559-sfx. After doing ruby dk.rb install --force. I tried to test if it's setup correctly but run into:
c:\DevKit>gem install RedCloth --platform=ruby
Temporarily enhancing PATH to include DevKit...
Building native extensions. This could take a while...
The system cannot find the path specified.
ERROR: Error installing RedCloth:
ERROR: Failed to build gem native extension.
C:/Ruby193/bin/ruby.exe extconf.rb
checking for main() in -lc... no
creating Makefile
Gem files will remain installed in C:/Ruby193/lib/ruby/gems/1.9.1/gems/RedCloth-4.2.9 for inspection.
Results logged to C:/Ruby193/lib/ruby/gems/1.9.1/gems/RedCloth-4.2.9/ext/redcloth_scan/gem_make.out
And this happens to all gems that need the Devkit. I guess I have to set the path specified but I have no idea what that means. How do I do that or what's the real problem here?
P.S.
A little bit of background. I did have RailsInstaller installed but I was getting the same error so I deleted everything. I also had NodeJs installed as well but deleted that too. I erased the PATH variables completely to start from scratch.
UPDATE
Trying the RailsInstaller gives me this error:
$ gem install json -v 1.8.0
Temporarily enhancing PATH to include DevKit...
Building native extensions. This could take a while...
The system cannot find the path specified.
ERROR: Error installing json:
ERROR: Failed to build gem native extension.
c:/RailsInstaller/Ruby1.9.3/bin/ruby.exe extconf.rb
creating Makefile
Gem files will remain installed in c:/RailsInstaller/Ruby1.9.3/lib/ruby/gems/1.9.1/gems/json-1.8.0 for inspection.
Results logged to c:/RailsInstaller/Ruby1.9.3/lib/ruby/gems/1.9.1/gems/json-1.8.0/ext/json/ext/generator/gem_make.out
Answer
I hate to bump an old thread, but I wish to add to the answers just in case someone else comes by (likely as this is at the top of a Google search for a "Devkit PATH error").
After extracting the DevKit into a permanent directory and after you've navigated to the install folder within your shell and entered the "ruby dk.rb init" command, make sure you actually do the next step and install the devkit. After the init command, run "ruby dk.rb install" and that should fix many similar problems.