EventMachine(0.12.10)はRubyInstaller(1.9.2)+ DevKit ではgem installできない。 gem install eventmachine こんなエラー。 C:/Ruby192/bin/ruby.exe extconf.rb (省略) cmain.cpp: In function 'int evma_send_file_data_to_connection(long unsigned int, const char*)': cmain.cpp:752:6: error: cannot convert 'stat*' to '_stati64*' for argument '2' to 'int _fstati64(int, _stati64*)' make: *** [cmain.o] Error 1 (省略) Gem files will