我正在将我的数据库从sqlite更新到mySQL（@ mu太短了……我知道。我知道。我应该在一开始就做完）并遇到问题。

到目前为止的过程如下：

步骤1：

更新的database.yml和运行耙分贝：模式：负荷按本

rake aborted!
Please install the mysql adapter: `gem install activerecord-mysql-adapter` (mysql is not part of the bundle. Add it to Gemfile.)

第2步：

跑 rvm @global do gem install mysql

Fetching: mysql-2.9.1.gem (100%)
Building native extensions.  This could take a while...
ERROR:  Error installing mysql:
    ERROR: Failed to build gem native extension.

    /Users/charliekim/.rvm/rubies/ruby-2.0.0-p247/bin/ruby extconf.rb
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... no
checking for mysql_query() in -lmysqlclient... no
checking for main() in -lmygcc... no
checking for mysql_query() in -lmysqlclient... no
*** 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
    --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=/Users/charliekim/.rvm/rubies/ruby-2.0.0-p247/bin/ruby
    --with-mysql-config
    --without-mysql-config
    --with-mysql-dir
    --without-mysql-dir
    --with-mysql-include
    --without-mysql-include=${mysql-dir}/include
    --with-mysql-lib
    --without-mysql-lib=${mysql-dir}/
    --with-mysqlclientlib
    --without-mysqlclientlib
    --with-mlib
    --without-mlib
    --with-mysqlclientlib
    --without-mysqlclientlib
    --with-zlib
    --without-zlib
    --with-mysqlclientlib
    --without-mysqlclientlib
    --with-socketlib
    --without-socketlib
    --with-mysqlclientlib
    --without-mysqlclientlib
    --with-nsllib
    --without-nsllib
    --with-mysqlclientlib
    --without-mysqlclientlib
    --with-mygcclib
    --without-mygcclib
    --with-mysqlclientlib
    --without-mysqlclientlib


Gem files will remain installed in /Users/charliekim/.rvm/gems/ruby-2.0.0-p247@global/gems/mysql-2.9.1 for inspection.
Results logged to /Users/charliekim/.rvm/gems/ruby-2.0.0-p247@global/gems/mysql-2.9.1/ext/mysql_api/gem_make.out

第三步：

搜索SO =>无法在Mac OS X上安装mysql gem

此答案中的解决方案不起作用，因为其中没有mySQL目录，/usr/local因此我无法在其中编辑代码。

第4步：

的输出mkmf.log=> http://pastebin.com/7qSdv73R
的输出gcc -v=>

Using built-in specs.
Target: i686-apple-darwin10
Configured with: /var/tmp/gcc/gcc-5666.3~6/src/configure --disable-checking --enable-werror --prefix=/usr --mandir=/share/man --enable-languages=c,objc,c++,obj-c++ --program-transform-name=/^[cg][^.-]*$/s/$/-4.2/ --with-slibdir=/usr/lib --build=i686-apple-darwin10 --program-prefix=i686-apple-darwin10- --host=x86_64-apple-darwin10 --target=i686-apple-darwin10 --with-gxx-include-dir=/include/c++/4.2.1
Thread model: posix
gcc version 4.2.1 (Apple Inc. build 5666) (dot 3)

编辑1：

我也跑了：gem install activerecord-mysql-adapter

返回：

Fetching: mysql-2.9.1.gem (100%)
Building native extensions.  This could take a while...
Successfully installed mysql-2.9.1
Fetching: i18n-0.6.5.gem (100%)
Successfully installed i18n-0.6.5
Fetching: atomic-1.1.13.gem (100%)
Building native extensions.  This could take a while...
Successfully installed atomic-1.1.13
Fetching: thread_safe-0.1.2.gem (100%)
Successfully installed thread_safe-0.1.2
Fetching: activesupport-4.0.0.gem (100%)
Successfully installed activesupport-4.0.0
Fetching: activerecord-mysql-adapter-0.0.1.gem (100%)
Successfully installed activerecord-mysql-adapter-0.0.1
Fetching: builder-3.1.4.gem (100%)
Successfully installed builder-3.1.4
Fetching: activemodel-4.0.0.gem (100%)
Successfully installed activemodel-4.0.0
Fetching: arel-4.0.0.gem (100%)
Successfully installed arel-4.0.0
Fetching: activerecord-deprecated_finders-1.0.3.gem (100%)
Successfully installed activerecord-deprecated_finders-1.0.3
Parsing documentation for mysql-2.9.1
unable to convert "\xCF" from ASCII-8BIT to UTF-8 for lib/mysql/mysql_api.bundle, skipping
Installing ri documentation for mysql-2.9.1
Parsing documentation for i18n-0.6.5
Installing ri documentation for i18n-0.6.5
Parsing documentation for atomic-1.1.13
unable to convert "\xCF" from ASCII-8BIT to UTF-8 for lib/atomic_reference.bundle, skipping
Installing ri documentation for atomic-1.1.13
Parsing documentation for thread_safe-0.1.2
Installing ri documentation for thread_safe-0.1.2
Parsing documentation for activesupport-4.0.0
unable to convert "\x80" from ASCII-8BIT to UTF-8 for lib/active_support/values/unicode_tables.dat, skipping
Installing ri documentation for activesupport-4.0.0
Parsing documentation for activerecord-mysql-adapter-0.0.1
Installing ri documentation for activerecord-mysql-adapter-0.0.1
Parsing documentation for builder-3.1.4
/Users/charliekim/.rvm/rubies/ruby-2.0.0-p247/lib/ruby/2.0.0/rdoc/parser.rb:87: warning: Unsupported encoding : ignored
/Users/charliekim/.rvm/rubies/ruby-2.0.0-p247/lib/ruby/2.0.0/rdoc/parser.rb:87: warning: Unsupported encoding  ignored
Installing ri documentation for builder-3.1.4
Parsing documentation for activemodel-4.0.0
Installing ri documentation for activemodel-4.0.0
Parsing documentation for arel-4.0.0
Installing ri documentation for arel-4.0.0
Parsing documentation for activerecord-deprecated_finders-1.0.3
Installing ri documentation for activerecord-deprecated_finders-1.0.3
10 gems installed

但是运行时我仍然遇到相同的错误rake db:schema:load：

Rake aborted!
Please install the mysql adapter: `gem install activerecord-mysql-adapter` (mysql is not part of the bundle. Add it to Gemfile.)
...

编辑2：

这里是database.yml：

development:
  adapter: mysql
  encoding: utf8
  reconnect: false
  database: db/development
  pool: 5
  username: [name]
  password: [password]
  socket: /tmp/mysql.sock
test:
  adapter: mysql
  encoding: utf8
  reconnect: false
  database: db/test
  pool: 5
  username: [name]
  password: [password]
  socket: /tmp/mysql.sock

production:
  adapter: mysql
  encoding: utf8
  reconnect: false
  database: db/production
  pool: 5
  username: [name]
  password: [password]
  socket: /tmp/mysql.sock

我添加gem "mysql"到gemfile，现在出现错误

rake aborted!
Can't connect to local MySQL server through socket '/tmp/mysql.sock' (2)

我不知道这些套接字应该是什么，我根据一个SO帖子填充了它们，所以这可能是问题的一部分。