mysql e rails... won't work!

ruby 1.9.2p0 (2010-08-18) [i386-mingw32]
Rails 3.0.0
gem -v 1.3.7

When I create an application

rails new application -d mysql

then I try to start the server

rails server

I get this message:

Could not find gem 'mysql2 (>= 0, runtime)' in any of the gem sources.
Try running `bundle install`.

so I try bundle install

Fetching source index for http://rubygems.org/
Using rake (0.8.7)
Using abstract (1.0.0)
Using activesupport (3.0.0)
Using builder (2.1.2)
Using i18n (0.4.1)
Using activemodel (3.0.0)
Using erubis (2.6.6)
Using rack (1.2.1)
Using rack-mount (0.6.13)
Using rack-test (0.5.5)
Using tzinfo (0.3.23)
Using actionpack (3.0.0)
Using mime-types (1.16)
Using polyglot (0.3.1)
Using treetop (1.4.8)
Using mail (2.2.6.1)
Using actionmailer (3.0.0)
Using arel (1.0.1)
Using activerecord (3.0.0)
Using activeresource (3.0.0)
Using bundler (1.0.0)
Installing mysql2 (0.2.4) with native extensions C:/Ruby192/lib/ruby/
1.9.1/rubygems/installer.rb:483:in `rescue in block in
build_extensions': ERROR: Failed to build gem native extension.
(Gem::Installer::ExtensionBuildError)

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 generate 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 postpone'
        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/gem_make.out
        from C:/Ruby192/lib/ruby/1.9.1/rubygems/installer.rb:486:in
`block in build_extensions'
        from C:/Ruby192/lib/ruby/1.9.1/rubygems/installer.rb:446:in
`each'
        from C:/Ruby192/lib/ruby/1.9.1/rubygems/installer.rb:446:in
`build_extensions'
        from C:/Ruby192/lib/ruby/1.9.1/rubygems/installer.rb:198:in
`install'
        from C:/Ruby192/lib/ruby/gems/1.9.1/gems/bundler-1.0.0/lib/
bundler/source.rb:100:in `install'
        from C:/Ruby192/lib/ruby/gems/1.9.1/gems/bundler-1.0.0/lib/
bundler/installer.rb:55:in `block in run'
        from C:/Ruby192/lib/ruby/gems/1.9.1/gems/bundler-1.0.0/lib/
bundler/spec_set.rb:12:in `block in each'
        from C:/Ruby192/lib/ruby/gems/1.9.1/gems/bundler-1.0.0/lib/
bundler/spec_set.rb:12:in `each'
        from C:/Ruby192/lib/ruby/gems/1.9.1/gems/bundler-1.0.0/lib/
bundler/spec_set.rb:12:in `each'
        from C:/Ruby192/lib/ruby/gems/1.9.1/gems/bundler-1.0.0/lib/
bundler/installer.rb:44:in `run'
        from C:/Ruby192/lib/ruby/gems/1.9.1/gems/bundler-1.0.0/lib/
bundler/installer.rb:8:in `install'
        from C:/Ruby192/lib/ruby/gems/1.9.1/gems/bundler-1.0.0/lib/
bundler/cli.rb:217:in `install'
        from C:/Ruby192/lib/ruby/gems/1.9.1/gems/bundler-1.0.0/lib/
bundler/vendor/thor/task.rb:22:in `run'
        from C:/Ruby192/lib/ruby/gems/1.9.1/gems/bundler-1.0.0/lib/
bundler/vendor/thor/invocation.rb:118:in `invoke_task'
        from C:/Ruby192/lib/ruby/gems/1.9.1/gems/bundler-1.0.0/lib/
bundler/vendor/thor.rb:246:in `dispatch'
        from C:/Ruby192/lib/ruby/gems/1.9.1/gems/bundler-1.0.0/lib/
bundler/vendor/thor/base.rb:389:in `start'
        from C:/Ruby192/lib/ruby/gems/1.9.1/gems/bundler-1.0.0/bin/
bundle:13:in `<top (required)>'
        from C:/Ruby192/bin/bundle:19:in `load'
        from C:/Ruby192/bin/bundle:19:in `<main>'

what am I doing wrong?

Here's your hint. Do you have the ming32 toolset installed?

Fred

im having the same issue. i forgot to run the "dk.rb install" for the
DevKit but now that I try, the dk.rb is complaining to me it cant find
the config.yml (in some unknown location) .

Frederick Cheung wrote in post #943745: