From: Tim Hunter <TimHunter@...>
Date: 2009-09-03T05:50:45+09:00
Subject: Re: RMagick 2.11.0 install fails with ImageMagick 6.5.4

pharrington wrote:
> Trying to install RMagick 2.11.0 was giving me the following error:
> 
> Updating rmagick
> Building native extensions.  This could take a while...
> ERROR:  While executing gem ... (Gem::Installer::ExtensionBuildError)
>     ERROR: Failed to build gem native extension.
> 
> /usr/bin/ruby1.8 extconf.rb update
> checking for Ruby version >= 1.8.5... yes
> checking for cc... yes
> checking for Magick-config... yes
> checking for ImageMagick version >= 6.3.5... yes
> checking for HDRI disabled version of ImageMagick... yes
> checking for stdint.h... yes
> checking for sys/types.h... yes
> checking for wand/MagickWand.h... yes
> checking for InitializeMagick() in -lMagickCore... no
> checking for InitializeMagick() in -lMagick... no
> Can't install RMagick 2.11.0. Can't find the ImageMagick library or
> one of the dependent libraries. Check the mkmf.log file for more
> detailed information.
> 
> *** 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/bin/ruby1.8
>         --with-MagickCorelib
>         --without-MagickCorelib
>         --with-Magicklib
>         --without-Magicklib
> 
> 
> Gem files will remain installed in /var/lib/gems/1.8/gems/
> rmagick-2.11.0 for inspection.
> Results logged to /var/lib/gems/1.8/gems/rmagick-2.11.0/ext/RMagick/
> gem_make.out
> 
> 
> convert -version was:
> 
> Version: ImageMagick 6.5.4-2 2009-07-04 Q8 OpenMP http://www.imagemagick.org
> Copyright: Copyright (C) 1999-2009 ImageMagick Studio LLC
> 
> mkmf.log: http://pastebin.com/m776a3e36
> 
> Installing ImageMagick 6.5.5 fixes all this though. Was there a typo
> in the required ImageMagick version for the build script?
> 
> 

RMagick 2 works with ImageMagick 6.3.0 and later.

Line 98 in mkmf.log says "/usr/bin/ld: cannot find -lltdl". That is, ld 
failed because ImageMagick says it needs libltdl.so but that library 
couldn't be found. Googling "imagemagick libltdl" uncovers a number of 
questions about this library and ImageMagick. I'm guessing that some 
change to ImageMagick 6.5.5 configuration resolved the problem.

-- 
MagickWand for Ruby - http://magickwand.rubyforge.org/