ruby-on-rails - Amazon Linux での sqlite3 エラー

Question

ec2 で新しい Rails アプリを作成しようとしています。Ruby 1.9.3 と Rails 3.2.3 を使用しています

[root@xxxx]# rails g
/usr/local/share/gems/gems/sqlite3-1.3.6/lib/sqlite3.rb:6:in `require': cannot load such file -- sqlite3/sqlite3_native
(LoadError)
        from /usr/local/share/gems/gems/sqlite3-1.3.6/lib/sqlite3.rb:6:in `rescue in <top (required)>'
        from /usr/local/share/gems/gems/sqlite3-1.3.6/lib/sqlite3.rb:2:in `<top (required)>'
        from /usr/local/share/gems/gems/bundler-1.1.3/lib/bundler/runtime.rb:68:in `require'
        from /usr/local/share/gems/gems/bundler-1.1.3/lib/bundler/runtime.rb:68:in `block (2 levels) in require'
        from /usr/local/share/gems/gems/bundler-1.1.3/lib/bundler/runtime.rb:66:in `each'
        from /usr/local/share/gems/gems/bundler-1.1.3/lib/bundler/runtime.rb:66:in `block in require'
        from /usr/local/share/gems/gems/bundler-1.1.3/lib/bundler/runtime.rb:55:in `each'
        from /usr/local/share/gems/gems/bundler-1.1.3/lib/bundler/runtime.rb:55:in `require'
        from /usr/local/share/gems/gems/bundler-1.1.3/lib/bundler.rb:119:in `require'
        from /root/twt/config/application.rb:7:in `<top (required)>'
        from /usr/local/share/gems/gems/railties-3.2.3/lib/rails/commands.rb:24:in `require'
        from /usr/local/share/gems/gems/railties-3.2.3/lib/rails/commands.rb:24:in `<top (required)>'
        from script/rails:6:in `require'
        from script/rails:6:in `<main>'

私がする時：

[root@xxxx]# find / | grep sqlite3/sqlite3_native

そうですか：

/usr/local/lib/gems/exts/sqlite3-1.3.6/lib/sqlite3/sqlite3_native.so
/usr/local/share/gems/gems/sqlite3-1.3.6/ext/sqlite3/sqlite3_native.so

Rails が sqlite3 を認識できないのはなぜですか?