La gemma di RMagick non riesce ad essere installata su Debian Stable

Question

modifica: [FISSO] Il problema era che l'avevo già installato, ma non lo sapevo, e ho provato ad installarlo dal sorgente. Questo ha creato due versioni e la gemma non sapeva quale usare. Ho riparato andando alla fonte scaricato e funzionante

sudo make uninstall 

Poi corsi gem install nuovo RMagick e ha funzionato!

[problema originale]

Sto cercando di installare la gemma RMagick come in this railscast. Ecco un frammento di quello che ho messo nel mio Gemfile:

gem 'rmagick' 
gem 'carrierwave' 

E quando corro bundle install ottengo il seguente output:

Installing rmagick (2.13.1) with native extensions 
Gem::Installer::ExtensionBuildError: ERROR: Failed to build gem native extension. 

     /home/techusb/.rbenv/versions/1.9.3-p125/bin/ruby extconf.rb 
checking for Ruby version >= 1.8.5... yes 
extconf.rb:128: Use RbConfig instead of obsolete and deprecated Config. 
checking for cc... yes 
checking for Magick-config... yes 

Warning: Found more than one ImageMagick installation. This could cause problems at runtime. 
     /usr/local/bin/Magick-config reports version 6.8.0 Q16 is installed in /usr/local 
     /usr/bin/Magick-config reports version 1.3.12 is installed in /usr 
Using 6.8.0 Q16 from /usr/local. 

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=/home/techusb/.rbenv/versions/1.9.3-p125/bin/ruby 
/home/techusb/.rbenv/versions/1.9.3-p125/lib/ruby/1.9.1/mkmf.rb:381:in `try_do': The compiler failed to generate an executable file. (RuntimeError) 
You have to install development tools first. 
    from /home/techusb/.rbenv/versions/1.9.3-p125/lib/ruby/1.9.1/mkmf.rb:506:in `try_cpp' 
    from /home/techusb/.rbenv/versions/1.9.3-p125/lib/ruby/1.9.1/mkmf.rb:931:in `block in have_header' 
    from /home/techusb/.rbenv/versions/1.9.3-p125/lib/ruby/1.9.1/mkmf.rb:790:in `block in checking_for' 
    from /home/techusb/.rbenv/versions/1.9.3-p125/lib/ruby/1.9.1/mkmf.rb:284:in `block (2 levels) in postpone' 
    from /home/techusb/.rbenv/versions/1.9.3-p125/lib/ruby/1.9.1/mkmf.rb:254:in `open' 
    from /home/techusb/.rbenv/versions/1.9.3-p125/lib/ruby/1.9.1/mkmf.rb:284:in `block in postpone' 
    from /home/techusb/.rbenv/versions/1.9.3-p125/lib/ruby/1.9.1/mkmf.rb:254:in `open' 
    from /home/techusb/.rbenv/versions/1.9.3-p125/lib/ruby/1.9.1/mkmf.rb:280:in `postpone' 
    from /home/techusb/.rbenv/versions/1.9.3-p125/lib/ruby/1.9.1/mkmf.rb:789:in `checking_for' 
    from /home/techusb/.rbenv/versions/1.9.3-p125/lib/ruby/1.9.1/mkmf.rb:930:in `have_header' 
    from extconf.rb:193:in `<main>' 


Gem files will remain installed in /home/techusb/.rbenv/versions/1.9.3-p125/lib/ruby/gems/1.9.1/gems/rmagick-2.13.1 for inspection. 
Results logged to /home/techusb/.rbenv/versions/1.9.3-p125/lib/ruby/gems/1.9.1/gems/rmagick-2.13.1/ext/RMagick/gem_make.out 
An error occurred while installing rmagick (2.13.1), and Bundler cannot continue. 
Make sure that `gem install rmagick -v '2.13.1'` succeeds before bundling. 

Per quanto riguarda questa linea:

The compiler failed to generate an executable file. (RuntimeError) 
You have to install development tools first. 

penso Ho esaurito tutte le informazioni su come risolvere questo errore tramite google/stackoverflow. Ho già provato a installare i pacchetti di sviluppo e così via. Non so da dove andare. Qualsiasi aiuto molto apprezzato.

Answer 1

=>https://stackoverflow.com/a/10647962/1420038;

"Il nuovo modo corretto è quello di installare libmagickwand-dev:.

sudo apt-get install libmagickwand-dev Poi si dovrebbe essere in grado di installare RMagick nessun problema"

funziona su debian 6.0.6