kubo39/bossan — pull request #2 by rnakano (2013-02-24 08:00:26+00:00)
Title: Modify gemspec and extconf.rb for easy building

There is a problem `ruby extconf.rb && make` fail.
Fix it by move compiling file checks from gemspec to extconf.rb.
In extconf.rb, using not 'host_os' but have_header() method.