Snow leopard と Xcode をインストールしたところ、バージョン 5.1.38 を mysql の Web サイトからダウンロードしてインストールしました。次に、sudo gem uninstall mysqlを実行しました。以下のように mysql を gem install しようとすると、ドキュメント エラーが発生します。mysqlを端末に入力するだけで、 -bash: mysql: command not found が表示されます。MySql Administrator (gui) 経由で接続しようとすると、Ruby on Rails アプリ経由でも接続しようとすると、 ソケット '/tmp/mysql.sock を介してローカル MySQL サーバーに接続できません。助言がありますか？
$ sudo env ARCHFLAGS="-arch x86_64" gem install mysql -- --with-mysql-config=/usr/local/mysql/bin/mysql_config
Building native extensions. This could take a while...
Successfully installed mysql-2.8.1
1 gem installed
Installing ri documentation for mysql-2.8.1...
No definition for next_result
No definition for field_name
No definition for field_table
No definition for field_def
No definition for field_type
No definition for field_length
No definition for field_max_length
No definition for field_flags
No definition for field_decimals
No definition for time_inspect
No definition for time_to_s
No definition for time_get_year
No definition for time_get_month
No definition for time_get_day
No definition for time_get_hour
No definition for time_get_minute
No definition for time_get_second
No definition for time_get_neg
No definition for time_get_second_part
No definition for time_set_year
No definition for time_set_month
No definition for time_set_day
No definition for time_set_hour
No definition for time_set_minute
No definition for time_set_second
No definition for time_set_neg
No definition for time_set_second_part
No definition for time_equal
No definition for error_errno
No definition for error_sqlstate
Installing RDoc documentation for mysql-2.8.1...
No definition for next_result
No definition for field_name
No definition for field_table
No definition for field_def
No definition for field_type
No definition for field_length
No definition for field_max_length
No definition for field_flags
No definition for field_decimals
No definition for time_inspect
No definition for time_to_s
No definition for time_get_year
No definition for time_get_month
No definition for time_get_day
No definition for time_get_hour
No definition for time_get_minute
No definition for time_get_second
No definition for time_get_neg
No definition for time_get_second_part
No definition for time_set_year
No definition for time_set_month
No definition for time_set_day
No definition for time_set_hour
No definition for time_set_minute
No definition for time_set_second
No definition for time_set_neg
No definition for time_set_second_part
No definition for time_equal
No definition for error_errno
No definition for error_sqlstate