已修改 database.yml: ~/mds/config$ cat database.yml

MySQL. Versions 4.1 and 5.0 are recommended.

Install the MYSQL driver

gem install mysql2

#

Ensure the MySQL gem is defined in your Gemfile

gem 'mysql2'

#

And be sure to use new-style password hashing:

http://dev.mysql.com/doc/refman/5.0/en/old-client.html

development: adapter: mysql2 encoding: utf8 reconnect: false database: mds_development pool: 5 username: root password: socket: /var/run/mysqld/mysqld.sock

Warning: The database defined as "test" will be erased and

re-generated from your development database when you run "rake".

Do not set this db to the same as development or production.

test: adapter: mysql2 encoding: utf8 reconnect: false database: mds_test pool: 5 username: root password: socket: /var/run/mysqld/mysqld.sock

production: adapter: mysql2 encoding: utf8 reconnect: false database: mds_production pool: 5 username: root password: socket: /var/run/mysqld/mysqld.sock

运行 rake: ~/blog$ rake db:create rake aborted! Please install the mysql2 adapter: gem install activerecord-mysql2-adapter (mysql2 is not part of the bundle. Add it to Gemfile.)

提示要安装 gem install activerecord-mysql2-adapter 安装： ~/blog$ gem install activerecord-mysql2-adapter Building native extensions. This could take a while... ERROR: Error installing activerecord-mysql2-adapter: ERROR: Failed to build gem native extension.

/home/liucc/.rvm/rubies/ruby-1.9.2-p320/bin/ruby extconf.rb checking for rb_thread_blocking_region()... yes checking for rb_wait_for_single_fd()... no checking for mysql_query() in -lmysqlclient... no checking for main() in -lm... yes checking for mysql_query() in -lmysqlclient... no checking for main() in -lz... yes checking for mysql_query() in -lmysqlclient... no checking for main() in -lsocket... no checking for mysql_query() in -lmysqlclient... no checking for main() in -lnsl... yes checking for mysql_query() in -lmysqlclient... no checking for main() in -lmygcc... no checking for mysql_query() in -lmysqlclient... no *** extconf.rb failed ***

求助为何安装 MYSQL adapter 报错！？！