rmagick gem 未安装在 Windows 上

Question

I am trying to install all ruby gems ion windows for redmine. Everytime I am getting below exception

C:\xampp\htdocs\dev-ruby\redmine>gem install rmagick
Temporarily enhancing PATH to include DevKit...
Building native extensions.  This could take a while...
ERROR:  Error installing rmagick:
ERROR: Failed to build gem native extension.
C:/xampp/ruby/RailsInstaller/Ruby2.2.0/bin/ruby.exe extconf.rb
*** 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=C:/xampp/ruby/RailsInstaller/Ruby2.2.0/bin/$(RUBY_BASE_NAME)
extconf.rb:141:in ``': No such file or directory - identify -version (Errno::ENOENT)
from extconf.rb:141:in `configure_compile_options'
from extconf.rb:16:in `initialize'
from extconf.rb:548:in `new'
from extconf.rb:548:in `<main>'
extconf failed, exit code 1
Gem files will remain installed in C:/xampp/ruby/RailsInstaller/Ruby2.2.0/lib/ruby/gems/2.2.0/gems/rmagick-2.16.0 for inspection.
Results logged to C:/xampp/ruby/RailsInstaller/Ruby2.2.0/lib/ruby/gems/2.2.0/extensions/x86-mingw32/2.2.0/rmagick-2.16.0/gem_make.out

Answer 1

rmagick is just a wrapper for ImageMagick . extconf.rb is checking for the presence of ImageMagick by running identify , which is one of the programs provided by ImageMagick. It isn't finding it, hence the No such file or directory message.

You need to install ImageMagick and make sure that its executables are in your path.

Make sure that in the same place you run gem install rmagick you can also run identify -version successfully.

Answer 2

This topic is kind of hard to solve, due to the problems with ImageMagick can be caused by any number of reasons.

For anyone feeling a bit lost like i did, i recommend this link which helped me solve my issue: https://medium.com/ruby-on-rails-web-application-development/install-rmagick-gem-on-windows-7-8-10-imagemagick-6-9-4-q16-hdri-5492c3fef202