Ruby's narray gem installation error on Windows

Question

I'm trying to install the NArray gem for Ruby to do some math functions. I'm running Ruby version 2.0.0p353 [x64-mingw32] on Windows with gem 2.014

When I attempt to install the NArray gem, it produces the following error:

D:\DocPerso\Workspace Ruby>gem install narray

Temporarily enhancing PATH to include DevKit...

Building native extensions. This could take a while...

ERROR: Error installing narray:

ERROR: Failed to build gem native extension.

C:/Ruby200-x64/Ruby200-x64/bin/ruby.exe extconf.rb

C:/Ruby200-x64/Ruby200-x64/bin/ruby.exe: No such file or directory -- extconf.rb (LoadError)

Gem files will remain installed in C:/Ruby200-x64/Ruby200-x64/lib/ruby/gems/2.0. 0/gems/narray-0.6.0.8 for inspection.

Results logged to C:/Ruby200-x64/Ruby200-x64/lib/ruby/gems/2.0.0/gems/narray-0.6 .0.8/src/gem_make.out

I've googled, with no luck whatsoever.

Her you find what I obtain with gem env :

RubyGems Environment:

• RUBYGEMS VERSION: 2.0.14

• RUBY VERSION: 2.0.0 (2013-11-22 patchlevel 353) [x64-mingw32]

• INSTALLATION DIRECTORY: C:/Ruby200-x64/Ruby200-x64/lib/ruby/gems/2.0.0

• RUBY EXECUTABLE: C:/Ruby200-x64/Ruby200-x64/bin/ruby.exe

• EXECUTABLE DIRECTORY: C:/Ruby200-x64/Ruby200-x64/bin

• RUBYGEMS PLATFORMS:

• ruby

• x64-mingw32

• GEM PATHS:

- C:/Ruby200-x64/Ruby200-x64/lib/ruby/gems/2.0.0

• GEM CONFIGURATION:

- :update_sources => true

- :verbose => true

- :backtrace => false

- :bulk_threshold => 1000

• REMOTE SOURCES:

- https://rubygems.org/

Answer 1

The instructions here worked for me.

AutoRun interferes with Ruby messing with child process executing and by result, affecting gem installation.

For the lazy; remove it with the following commands:

REG DELETE "HKCU\Software\Microsoft\Command Processor" /v AutoRun
REG DELETE "HKLM\Software\Microsoft\Command Processor" /v AutoRun