From: Pen Ttt <myocean135@...>
Date: 2010-12-07T16:15:07+09:00
Subject: install mysql problem

in my console,
pt@pt:~$ sudo gem install mysql
[sudo] password for pt:
Building native extensions.  This could take a while...
ERROR:  Error installing mysql:
  ERROR: Failed to build gem native extension.

/usr/bin/ruby1.8 extconf.rb
extconf.rb:10:in `require': no such file to load -- mkmf (LoadError)
  from extconf.rb:10


Gem files will remain installed in /var/lib/gems/1.8/gems/mysql-2.8.1
for inspection.
Results logged to
/var/lib/gems/1.8/gems/mysql-2.8.1/ext/mysql_api/gem_make.out
pt@pt:~$ gem -v
1.3.7
pt@pt:~$
what's wrong?

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