gemでmysqlのライブラリインストール

gemでmysqlのライブラリがインストールできひん

[root@localhost ~]# gem install mysql
Fetching: mysql-2.9.0.gem (100%)
Building native extensions.  This could take a while...
..........
ERROR:  Error installing mysql:
	ERROR: Failed to build gem native extension.

        /usr/bin/ruby extconf.rb
checking for mysql_ssl_set()... *** 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=/usr/bin/ruby
	--with-mysql-config
	--without-mysql-config
/usr/share/ruby/mkmf.rb:381:in `try_do': The compiler failed to generate an executable file. (RuntimeError)
You have to install development tools first.
	from /usr/share/ruby/mkmf.rb:461:in `try_link0'
	from /usr/share/ruby/mkmf.rb:476:in `try_link'
	from /usr/share/ruby/mkmf.rb:619:in `try_func'
	from /usr/share/ruby/mkmf.rb:894:in `block in have_func'
	from /usr/share/ruby/mkmf.rb:790:in `block in checking_for'
	from /usr/share/ruby/mkmf.rb:284:in `block (2 levels) in postpone'
	from /usr/share/ruby/mkmf.rb:254:in `open'
	from /usr/share/ruby/mkmf.rb:284:in `block in postpone'
	from /usr/share/ruby/mkmf.rb:254:in `open'
	from /usr/share/ruby/mkmf.rb:280:in `postpone'
	from /usr/share/ruby/mkmf.rb:789:in `checking_for'
	from /usr/share/ruby/mkmf.rb:893:in `have_func'
	from extconf.rb:45:in `<main>'


Gem files will remain installed in /usr/local/share/gems/gems/mysql-2.9.0 for inspection.
Results logged to /usr/local/share/gems/gems/mysql-2.9.0/ext/mysql_api/gem_make.out

先にmysqlの開発環境を整備しないといけんかった。

# yum install mysql-devel

もちろん、mysqlmysql-serverも必要。