[Ruby] gem mysql installations problem

msf > gem install mysql

[*] exec: gem install mysql
 
Building native extensions. This could take a while...
ERROR: Error installing mysql:
 ERROR: Failed to build gem native extension.
 
/opt/metasploit3/app/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=/opt/metasploit3/app/ruby
 --with-mysql-config
 --without-mysql-config
/opt/metasploit3/lib/ruby/1.9.1/mkmf.rb:362:in `try_do': The complier failed to generate an executable file. (RuntimeError)
You have to install development tools first.
 from /opt/metasploit3/lib/ruby/1.9.1/mkmf.rb:415:in `try_link0'
 from /opt/metasploit3/lib/ruby/1.9.1/mkmf.rb:419:in `try_link'
 from /opt/metasploit3/lib/ruby/1.9.1/mkmf.rb:527:in `try_func'
 from /opt/metasploit3/lib/ruby/1.9.1/mkmf.rb:772:in `block in have_func'
 from /opt/metasploit3/lib/ruby/1.9.1/mkmf.rb:668:in `block in checking_for'
 from /opt/metasploit3/lib/ruby/1.9.1/mkmf.rb:274:in `block (2 levels) in postpone'
 from /opt/metasploit3/lib/ruby/1.9.1/mkmf.rb:248:in `open'
 from /opt/metasploit3/lib/ruby/1.9.1/mkmf.rb:274:in `block in postpone'
 from /opt/metasploit3/lib/ruby/1.9.1/mkmf.rb:248:in `open'
 from /opt/metasploit3/lib/ruby/1.9.1/mkmf.rb:270:in `postpone'
 from /opt/metasploit3/lib/ruby/1.9.1/mkmf.rb:667:in `checking_for'
 from /opt/metasploit3/lib/ruby/1.9.1/mkmf.rb:771:in `have_func'
 from extconf.rb:50:in `<main>'
 
 
Gem files will remain installed in /opt/metasploit3/lib/ruby/gems/1.9.1/gems/mysql-2.8.1 for inspection.
Results logged to /opt/metasploit3/lib/ruby/gems/1.9.1/gems/mysql-2.8.1/ext/mysql_api/gem_make.out

msf > ruby --version

[*] exec: ruby --version
 
ruby 1.9.1p243 (2009-07-16) [i686-linux]

msf > uname -a

[*] exec: uname -a
 
Linux localhost 2.6.35-ARCH #1 SMP PREEMPT Fri Aug 27 16:22:18 UTC 2010 i686 Intel(R) Core(TM)2 Duo CPU T5800 @ 2.00GHz GenuineIntel GNU/Linux

msf > pacman -Q | grep mysql

[*] exec: pacman -Q | grep mysql
 
libmysqlclient 5.1.50-1
mysql 5.1.50-1
mysql-clients 5.1.50-1
mysql-ruby 2.8.2-1

msf > pacman -Q | grep ruby

[*] exec: pacman -Q | grep ruby
 
mysql-ruby 2.8.2-1
ruby 1.9.2_p0-3

msf > pacman -Q | grep header

[*] exec: pacman -Q | grep header
 
kernel26-headers 2.6.35.4-1
linux-api-headers 2.6.34-1