ruby - Installing RMagick Gem -

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i wanted gem install rmagick

and got this:

building native extensions.  take while... error:  error installing rmagick:     error: failed build gem native extension.  /usr/bin/ruby1.8 extconf.rb extconf.rb:1:in `require': no such file load -- mkmf (loaderror)     extconf.rb:1

imagemagick , libmagickwand-dev installed.

using ubuntu linux.

any help?

yours, joern.

use rvm install ruby (preferred) or use apt-get install ruby ruby-dev

aptitude install build-essential imagemagick libmagickcore-dev libmagickwand-dev gem install rmagick

--edit 1--
need ruby-dev (or ruby-full) compiling rmagick before gem install.


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