在我的Mac上安装rmagick gem时遇到问题。我的所有软件都是最新的。这是我的错误消息。我已经尝试重新安装ImageMagick，但似乎没有任何工作。我用自制软件 - 那不可能因为这个问题，对吧？
我是一个命令行新手，所以也许这是一个简单的修复，但我不明白这个错误信息。
Devens-MacBook-Air:~ Deven$ gem install rmagick
Building native extensions. This could take a while...
ERROR: Error installing rmagick:
ERROR: Failed to build gem native extension.
current directory: /usr/local/lib/ruby/gems/2.3.0/gems/rmagick- 2.15.4/ext/RMagick
/usr/local/opt/ruby/bin/ruby -r ./siteconf20160416-51851-5yrwrn.rb extconf.rb
checking for clang... yes
checking for Magick-config... yes
checking for outdated ImageMagick version (<= 6.4.9)... no
/usr/local/bin/Magick-config: line 41: pkg-config: command not found
/usr/local/bin/Magick-config: line 47: pkg-config: command not found
/usr/local/bin/Magick-config: line 50: pkg-config: command not found
/usr/local/bin/Magick-config: line 53: pkg-config: command not found
checking for Ruby version >= 1.8.5... yes
/usr/local/bin/Magick-config: line 53: pkg-config: command not found
Can't install RMagick 2.15.4. 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
-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/local/Cellar/ruby/2.3.0/bin/$(RUBY_BASE_NAME)
To see why this extension failed to compile, please check the mkmf.log which can be found here:
/usr/local/lib/ruby/gems/2.3.0/extensions/x86_64-darwin-15/2.3.0/rmagick-2.15.4/mkmf.log
extconf failed, exit code 1
Gem files will remain installed in /usr/local/lib/ruby/gems/2.3.0/gems/rmagick-2.15.4 for inspection.
Results logged to /usr/local/lib/ruby/gems/2.3.0/extensions/x86_64-darwin-15/2.3.0/rmagick-2.15.4/gem_make.out
以下所有命令行都将解决此问题。
brew install imagemagick
cd /usr/local/Cellar/imagemagick/6.8.0-10/lib
ln -s libMagick++-Q16.7.dylib libMagick++.dylib
ln -s libMagickCore-Q16.7.dylib libMagickCore.dylib
ln -s libMagickWand-Q16.7.dylib libMagickWand.dylib
gem install rmagick
6.8.0是imagemagick版本。希望这会奏效。