From: Pen Ttt <myocean135@...>
Date: 2010-05-05T22:41:27+09:00
Subject: sudo gem install mysql  problem

today i have installed ubuntu10.04.
pt@pt-laptop:~$ ruby -v
ruby 1.8.7 (2010-01-10 patchlevel 249) [i486-linux]
pt@pt-laptop:~$ gem -v
1.3.5
pt@pt-laptop:~$ sudo gem install mysql
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

how to sovle the problem?
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