ruby-on-rails - ImageMagick : ERROR: Failed to build gem native extension

Question

我在安装名为 rmagick 的 gem 时出错。我在其他 Stack Over flow 网站上看到过关于同一问题的信息。但没有工作。

错误:

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.

    current directory: C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/rmagick-2.16.0/ext/RMagick
C:/Ruby22-x64/bin/ruby.exe -r ./siteconf20170403-8836-1ebgkj8.rb 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:/Ruby22-x64/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:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/rmagick-2.16.0 for inspection.
Results logged to C:/Ruby22-x64/lib/ruby/gems/2.2.0/extensions/x64-mingw32/2.2.0/rmagick-2.16.0/gem_make.out

C:\Users\suresh>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.

    current directory: C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/rmagick-2.16.0/ext/RMagick
C:/Ruby22-x64/bin/ruby.exe -r ./siteconf20170403-7540-1x6tan0.rb 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:/Ruby22-x64/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:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/rmagick-2.16.0 for inspection.
Results logged to C:/Ruby22-x64/lib/ruby/gems/2.2.0/extensions/x64-mingw32/2.2.0/rmagick-2.16.0/gem_make.out

我实际上做了什么，第 3 步和第 4 步输出了上面相同的错误。

    1.Downloaded ImageMagick-7.0.5-4-Q16-x64-dll
    2.Set my Path to C:\Program Files (x86)\ImageMagick-7.0.5-Q16\include 
    set
    3.Install the gem using this command:
      gem install rmagick --platform=ruby -- --with-opt-lib=C:\ImageMagick-7.0.5-Q16\lib --with-opt-include=C:\ImageMagick-7.0.5-Q16\include
    4. or gem install rmagick
    5. Using Windows 10 machine

Answer 1

RMagick 似乎还不支持 ImageMagick 7。尝试使用最新版本的 ImageMagick 6.9 安装 rmagick。