Windowsへのhpricotのインストールではまった。
pikをビルドしようとしたら、hpricotがなくて怒られた。
そこで、hpricotを入れようとしたのだが、単純にgem install hpricotとしても、以下のようなエラーがでてくる。
$ gem install hpricot -v 0.8.3 Building native extensions. This could take a while... ERROR: Error installing hpricot: ERROR: Failed to build gem native extension. J:/developments/environments/Ruby/.pik/Ruby-192dev-preview3-1/bin/ruby.exe extconf.rb checking for stdio.h... *** 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=J:/developments/environments/Ruby/.pik/Ruby-192dev-preview3-1/bin/ruby J:/developments/environments/Ruby/.pik/Ruby-192dev-preview3-1/lib/ruby/1.9.1/mkmf.rb:368:in `try_do': The complier failed to generate an executable file. (RuntimeError) You have to install development tools first. from J:/developments/environments/Ruby/.pik/Ruby-192dev-preview3-1/lib/ruby/1.9.1/mkmf.rb:452:in `try_cpp' from J:/developments/environments/Ruby/.pik/Ruby-192dev-preview3-1/lib/ruby/1.9.1/mkmf.rb:834:in `block in have_header' from J:/developments/environments/Ruby/.pik/Ruby-192dev-preview3-1/lib/ruby/1.9.1/mkmf.rb:693:in `block in checking_for' from J:/developments/environments/Ruby/.pik/Ruby-192dev-preview3-1/lib/ruby/1.9.1/mkmf.rb:280:in `block (2 levels) in postpone' from J:/developments/environments/Ruby/.pik/Ruby-192dev-preview3-1/lib/ruby/1.9.1/mkmf.rb:254:in `open' from J:/developments/environments/Ruby/.pik/Ruby-192dev-preview3-1/lib/ruby/1.9.1/mkmf.rb:280:in `block in postpone' from J:/developments/environments/Ruby/.pik/Ruby-192dev-preview3-1/lib/ruby/1.9.1/mkmf.rb:254:in `open' from J:/developments/environments/Ruby/.pik/Ruby-192dev-preview3-1/lib/ruby/1.9.1/mkmf.rb:276:in `postpone' from J:/developments/environments/Ruby/.pik/Ruby-192dev-preview3-1/lib/ruby/1.9.1/mkmf.rb:692:in `checking_for' from J:/developments/environments/Ruby/.pik/Ruby-192dev-preview3-1/lib/ruby/1.9.1/mkmf.rb:833:in `have_header' from extconf.rb:2:in `<main>' Gem files will remain installed in J:/developments/environments/Ruby/.pik/Ruby-192dev-preview3-1/lib/ruby/gems/1.9.1/gems/hpricot-0.8.3 for inspection. Results logged to J:/developments/environments/Ruby/.pik/Ruby-192dev-preview3-1/lib/ruby/gems/1.9.1/gems/hpricot-0.8.3/ext/fast_xs/gem_make.out
いろいろ調べたら、ここに情報がのっていた。--> ソース
つまりは、--platform=mswin32 というオプションを付ければよかったのです。
$ gem install hpricot -v 0.8.3 --platform=mswin32 Successfully installed hpricot-0.8.3-x86-mswin32 1 gem installed Installing ri documentation for hpricot-0.8.3-x86-mswin32... Installing RDoc documentation for hpricot-0.8.3-x86-mswin32...
これで解決。