ImageMagick を Ruby で使おうと、Bundler で RMagick という Gem を入れようと思ったのだが、エラーが出た。ImageMagick は入っているのだが。
OS は Linux Mint 17.2。次のエラー。
Installing rmagick 2.15.4 with native extensions Gem::Ext::BuildError: ERROR: Failed to build gem native extension. /home/***i/.rbenv/versions/2.2.3/bin/ruby -r ./siteconf20160430-4264-2kinrp.rb extconf.rb checking for gcc... yes checking for Magick-config... no checking for pkg-config... yes Package MagickCore was not found in the pkg-config search path. Perhaps you should add the directory containing `MagickCore.pc' to the PKG_CONFIG_PATH environment variable No package 'MagickCore' found checking for outdated ImageMagick version (<= 6.4.9)... *** 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/***/.rbenv/versions/2.2.3/bin/$(RUBY_BASE_NAME) extconf failed, exit code 1 Gem files will remain installed in /home/***/Documents/Ruby/vendor/bundle/ruby/2.2.0/gems/rmagick-2.15.4 for inspection. Results logged to /home/***/Documents/Ruby/vendor/bundle/ruby/2.2.0/extensions/x86_64-linux/2.2.0-static/rmagick-2.15.4/gem_make.out
色いろぐぐってみたところ、開発用のライブラリが入っていないらしい。
ここを参考に
$ sudo apt-get install imagemagick libmagickcore-dev libmagickwand-dev
を実行。あとは bundle install で OK でした。