Windows XP. Ruby 1.9.2. Rails installed. MySQL installed. When I try to run gem install mysql2 (or bundle install) I get errors:
C:\ruby\cred2>gem install mysql2 Building native extensions. This could take a while... ERROR: Error installing mysql2: ERROR: Failed to build gem native extension. C:/Ruby192/bin/ruby.exe extconf.rb checking for rb_thread_blocking_region()... *** 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:/Ruby192/bin/ruby C:/Ruby192/lib/ruby/1.9.1/mkmf.rb:368:in `try_do': The complier failed to genera te an executable file. (RuntimeError) You have to install development tools first. from C:/Ruby192/lib/ruby/1.9.1/mkmf.rb:435:in `try_link0' from C:/Ruby192/lib/ruby/1.9.1/mkmf.rb:440:in `try_link' from C:/Ruby192/lib/ruby/1.9.1/mkmf.rb:552:in `try_func' from C:/Ruby192/lib/ruby/1.9.1/mkmf.rb:797:in `block in have_func' from C:/Ruby192/lib/ruby/1.9.1/mkmf.rb:693:in `block in checking_for' from C:/Ruby192/lib/ruby/1.9.1/mkmf.rb:280:in `block (2 levels) in postp one' from C:/Ruby192/lib/ruby/1.9.1/mkmf.rb:254:in `open' from C:/Ruby192/lib/ruby/1.9.1/mkmf.rb:280:in `block in postpone' from C:/Ruby192/lib/ruby/1.9.1/mkmf.rb:254:in `open' from C:/Ruby192/lib/ruby/1.9.1/mkmf.rb:276:in `postpone' from C:/Ruby192/lib/ruby/1.9.1/mkmf.rb:692:in `checking_for' from C:/Ruby192/lib/ruby/1.9.1/mkmf.rb:796:in `have_func' from extconf.rb:9:in `<main>' Gem files will remain installed in C:/Ruby192/lib/ruby/gems/1.9.1/gems/mysql2-0. 2.4 for inspection. Results logged to C:/Ruby192/lib/ruby/gems/1.9.1/gems/mysql2-0.2.4/ext/mysql2/ge m_make.out C:\ruby\cred2> 
