Ruby on Rails

hi guys,

I have been trying to install Rmagick on ubuntu karmic koala for a
day.

Yes, ImageMagicK has already been installed and works great with
paperclip and a few other perl scripts I have (which uses
Image::Magick).

The following is what the execution looks like when I tried to
install rmagick ( " gem install rmagick" ):

-------------------- Extract start
----------------------------------------------

ct9a@ubuntu-karmic-koala:~/projects/RealAutoParts# gem install rmagick
Building native extensions. This could take a while...
ERROR: Error installing rmagick:
ERROR: Failed to build gem native extension.

/usr/local/bin/ruby extconf.rb
checking for Ruby version >= 1.8.5... yes
checking for gcc... yes
checking for Magick-config... yes
checking for ImageMagick version >= 6.4.9... yes
checking for HDRI disabled version of ImageMagick... yes
checking for stdint.h... *** 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/local/bin/ruby
/usr/local/lib/ruby/1.9.1/mkmf.rb:364:in `try_do': The complier failed
to generate an executable file. (RuntimeError)
You have to install development tools first.
from /usr/local/lib/ruby/1.9.1/mkmf.rb:433:in `try_cpp'
from /usr/local/lib/ruby/1.9.1/mkmf.rb:811:in `block in
have_header'
from /usr/local/lib/ruby/1.9.1/mkmf.rb:670:in `block in
checking_for'
from /usr/local/lib/ruby/1.9.1/mkmf.rb:276:in `block (2
levels) in postpone'
from /usr/local/lib/ruby/1.9.1/mkmf.rb:250:in `open'
from /usr/local/lib/ruby/1.9.1/mkmf.rb:276:in `block in
postpone'
from /usr/local/lib/ruby/1.9.1/mkmf.rb:250:in `open'
from /usr/local/lib/ruby/1.9.1/mkmf.rb:272:in `postpone'
from /usr/local/lib/ruby/1.9.1/mkmf.rb:669:in `checking_for'
from /usr/local/lib/ruby/1.9.1/mkmf.rb:810:in `have_header'
from extconf.rb:193:in `<main>'

Gem files will remain installed in /usr/local/lib/ruby/gems/1.9.1/gems/
rmagick-2.13.1 for inspection.
Results logged to /usr/local/lib/ruby/gems/1.9.1/gems/rmagick-2.13.1/
ext/RMagick/gem_make.out

-------------------- Extract end-
----------------------------------------------

Any ideas, guys?

thank you :)

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