railsでmysql2のbundle installに失敗する
$ bundle install --path vendor/bundle ... 略 clang: error: linker command failed with exit code 1 (use -v to see invocation) make: *** [mysql2.bundle] Error 1 make failed, exit code 2 Gem files will remain installed in /path/to/gems/mysql2-0.5.2 for inspection. Results logged to /path/to/ruby/2.5.0/extensions/x86_64-darwin-18/2.5.0-static/mysql2-0.5.2/gem_make.out An error occurred while installing mysql2 (0.5.2), and Bundler cannot continue. Make sure that `gem install mysql2 -v '0.5.2' --source 'https://rubygems.org/'` succeeds before bundling. In Gemfile: mysql2
以下で治った
$ bundle config --local build.mysql2 "--with-ldflags=-L/usr/local/opt/openssl/lib --with-cppflags=-I/usr/local/opt/openssl/include" $ bundle install --path vendor/bundle