以下のリンクで説明されている問題とほぼ同じ問題があります。
Mysql2 gem-10.6 サーバーのインストール中にエラーが発生しました
説明されている解決策に従いましたが、次のようになります。
sudo env ARCHFLAGS="-arch x86_64" gem install mysql2 -- --with-mysql-config=/usr/local/mysql/bin/mysql_config
Building native extensions. This could take a while...
ERROR: Error installing mysql2:
ERROR: Failed to build gem native extension.
/Users/angelos/.rvm/rubies/ruby-1.9.2-p290/bin/ruby extconf.rb --with-mysql-config=/usr/local/mysql/bin/mysql_config
checking for rb_thread_blocking_region()... yes
checking for mysql.h... no
checking for mysql/mysql.h... no
-----
mysql.h is missing. please check your installation of mysql and try again.
-----
*** 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=/Users/angelos/.rvm/rubies/ruby-1.9.2-p290/bin/ruby
--with-mysql-config
Gem files will remain installed in /Users/angelos/.rvm/gems/ruby-1.9.2-p290/gems/mysql2-0.3.7 for inspection.
Results logged to /Users/angelos/.rvm/gems/ruby-1.9.2-p290/gems/mysql2-0.3.7/ext/mysql2/gem_make.out
さらに、すべてのmysqlパスを指定しようとしました：
sudo env ARCHFLAGS="-arch x86_64" gem install mysql --
--with-mysql-dir=/usr/local/mysql
--with-mysql-lib=/usr/local/mysql/lib
--with-mysql-include=/usr/local/mysql/include
--with-mysql-config=/usr/local/mysql/bin/mysql_config
それでもエラーが発生します
$ sudo env ARCHFLAGS="-arch x86_64" gem install mysql2 -- --with-mysql-dir=/usr/local/mysql --with-mysql-lib=/usr/local/mysql/lib --with-mysql-include=/usr/local/mysql/include --with-mysql-config=/usr/local/mysql/bin/mysql_config
Building native extensions. This could take a while...
ERROR: Error installing mysql2:
ERROR: Failed to build gem native extension.
/Users/angelos/.rvm/rubies/ruby-1.9.2-p290/bin/ruby extconf.rb --with-mysql-dir=/usr/local/mysql --with-mysql-lib=/usr/local/mysql/lib --with-mysql-include=/usr/local/mysql/include --with-mysql-config=/usr/local/mysql/bin/mysql_config
checking for rb_thread_blocking_region()... yes
checking for mysql.h... no
checking for mysql/mysql.h... no
-----
mysql.h is missing. please check your installation of mysql and try again.
-----
*** 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=/Users/angelos/.rvm/rubies/ruby-1.9.2-p290/bin/ruby
--with-mysql-config
Gem files will remain installed in /Users/angelos/.rvm/gems/ruby-1.9.2-p290/gems/mysql2-0.3.7 for inspection.
Results logged to /Users/angelos/.rvm/gems/ruby-1.9.2-p290/gems/mysql2-0.3.7/ext/mysql2/gem_make.out
どんな助けも高く評価しました。