Problems in installing thin on windows 7 - ruby

Question

I am new to ruby. I am trying to install a ruby gem thin. It shows an error in installing the gem. I googled for the error but i could not find a link that addresses my problem.
The error is:
C:\Users\name\Desktop>ruby -v
ruby 2.0.0p247 (2013-06-27) [i386-mingw32]
C:\Users\name\Desktop>gem -v
2.0.3
C:\Users\name\Desktop>gem install thin
Temporarily enhancing PATH to include DevKit...
Building native extensions. This could take a while...
ERROR: Error installing thin:
ERROR: Failed to build gem native extension.
C:/Ruby200/bin/ruby.exe extconf.rb
checking for main() in -lc... *** extconf.rb failed ***
Could not create Makefile due to some reason, probably lack of necessary
libraries and/or headers. Check the mkmf.log file for more details. You may
need configuration options.
Provided configuration options:
--with-opt-dir
--without-opt-dir
--with-opt-include
--without-opt-include=${opt-dir}/include
--with-opt-lib
--without-opt-lib=${opt-dir}/lib
--with-make-prog
--without-make-prog
--srcdir=.
--curdir
--ruby=C:/Ruby200/bin/ruby
--with-thin_parser-dir
--without-thin_parser-dir
--with-thin_parser-include
--without-thin_parser-include=${thin_parser-dir}/include
--with-thin_parser-lib
--without-thin_parser-lib=${thin_parser-dir}/
--with-clib
--without-clib
C:/Ruby200/lib/ruby/2.0.0/mkmf.rb:430:in `try_do': The compiler failed to generate an executable file. (RuntimeError)
You have to install development tools first.
from C:/Ruby200/lib/ruby/2.0.0/mkmf.rb:515:in `try_link0'
from C:/Ruby200/lib/ruby/2.0.0/mkmf.rb:530:in `try_link'
from C:/Ruby200/lib/ruby/2.0.0/mkmf.rb:716:in `try_func'
from C:/Ruby200/lib/ruby/2.0.0/mkmf.rb:946:in `block in have_library'
from C:/Ruby200/lib/ruby/2.0.0/mkmf.rb:891:in `block in checking_for'
from C:/Ruby200/lib/ruby/2.0.0/mkmf.rb:336:in `block (2 levels) in postpone'
from C:/Ruby200/lib/ruby/2.0.0/mkmf.rb:306:in `open'
from C:/Ruby200/lib/ruby/2.0.0/mkmf.rb:336:in `block in postpone'
from C:/Ruby200/lib/ruby/2.0.0/mkmf.rb:306:in `open'
from C:/Ruby200/lib/ruby/2.0.0/mkmf.rb:332:in `postpone'
from C:/Ruby200/lib/ruby/2.0.0/mkmf.rb:890:in `checking_for'
from C:/Ruby200/lib/ruby/2.0.0/mkmf.rb:941:in `have_library'
from extconf.rb:4:in `<main>'
Gem files will remain installed in C:/Ruby200/lib/ruby/gems/2.0.0/gems/thin-1.6.0 for inspection.
Results logged to C:/Ruby200/lib/ruby/gems/2.0.0/gems/thin-1.6.0/ext/thin_parser/gem_make.out
C:\Users\name\Desktop>
Any help truly appreciated. Thanks.

Answer 1

I resolved the problem by following these steps. Posting this answer as it might be useful for others.
I uninstalled and deleted all the ruby stuff and restarted the machine. Downloaded Ruby 2.0 and Devkit from here http://rubyinstaller.org/downloads/.
Installed ruby and devkit. Install devkit using the instructions given in this link https://github.com/oneclick/rubyinstaller/wiki/Development-Kit.
cd to ruby folder and installed rails, thin gem