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Editorial Team
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Asked: 2026-06-06T23:41:37+00:00

Trust me when I tell you I’ve read each and every single thing on

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Trust me when I tell you I’ve read each and every single thing on Stack related to this question (I know a few others have asked this).

OS: Ubuntu 10.04
Ruby: 1.8.7

I installed the latest build of ImageMagick by following their guidelines. I had a couple of problems, but was able to solve them and ultimately managed to get the ‘test’ command to spit out the correct result (i.e. convert logo: filename.png — which successfully changed the png file I gave it into a logo of ImageMagick, thus affirming that ImageMagick is installed correctly).

Now when I do sudo gem install rmagick I get the following result:

Building native extensions. This could take a while…
ERROR: Error installing rmagick:
ERROR: Failed to build gem native extension.

/usr/bin/ruby1.8 extconf.rb
extconf.rb:1:in `require’: no such file to load — mkmf (LoadError)
from extconf.rb:1

Gem files will remain installed in /var/lib/gems/1.8/gems/rmagick-2.13.1 for inspection.
Results logged to /var/lib/gems/1.8/gems/rmagick-2.13.1/ext/RMagick/gem_make.out

Would be eternally grateful for some assistance on this.

Thank you.

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1 Answer

  1. Editorial Team

    I managed to solve the problem, finally.

    I added this to my .bashrc file (to pick-up MagickCore.pc):

    export PKG_CONFIG_PATH="/usr/local/lib/pkgconfig"

    I then created two symlinks:

    ln -s /usr/local/include/ImageMagick/wand /usr/local/include/wand ln -s
/usr/local/include/ImageMagick/magick /usr/local/include/magick

    After this I was able to install rmagick by simply typing gem install rmagick.

    Hope this helps someone.

    Cheers.

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