C:\Users\cpable>gem install engtagger
Building native extensions. This could take a while... ERROR: Error installing engtagger: ERROR: Failed to build gem native extension.
C:/Ruby186/bin/ruby.exe extconf.rb checking for stdio.h... no * 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.