Cannot install the Rubygem "Link Parser" - ruby

Question

I would like to create a chatbot, and for that I want to use Link Parser, which is basically an engine that finds out the relations between words when looking at a sentence.
There is a Ruby wrapper which I tried to install by using:
gem install linkparser
and also:
gem install linkparser -- --with-link-grammar="C:\Users\Gebruiker\Downloads\Linkparsergrammar\linkgrammar4r-0.0.3"
However, I keep getting the following errors:
Temporarily enhancing PATH to include DevKit...
Building native extensions. This could take a while...
ERROR: Error installing linkparser:
ERROR: Failed to build gem native extension.
C:/Ruby193/bin/ruby.exe extconf.rb --with-link-grammar=C:\Users\Gebruiker\Downloads\Linkparsergrammar\linkgrammar4r-0.0.3
checking for pkg-config... no
Couldn't find your pkg-config binary
*** 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:/Ruby193/bin/ruby
--with-link-grammar
--with-pkg-config
--without-pkg-config
Gem files will remain installed in C:/Ruby193/lib/ruby/gems/1.9.1/gems/linkparser-1.1.3 for inspection.
Results logged to C:/Ruby193/lib/ruby/gems/1.9.1/gems/linkparser-1.1.3/ext/gem_make.out
I am on Windows Vista 32bit, and using the newest Ruby (1.9.3-p125)
Can somebody explain what's going on?

Answer 1

Does this help with your problem? problems on installing link-parser gem on snow leopard
I know it's for mac but it sounds similar