This gem can be a PITA to install on a mac, this is what worked for me. If you get this error:
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| charlock_holmes -v '0.7.6' | |
| Building native extensions. This could take a while… | |
| ERROR: Error installing charlock_holmes: | |
| ERROR: Failed to build gem native extension. | |
| current directory: /Users/will/.rbenv/versions/2.6.1/lib/ruby/gems/2.6.0/gems/charlock_holmes-0.7.6/ext/charlock_holmes | |
| /Users/will/.rbenv/versions/2.6.1/bin/ruby -I /Users/will/.rbenv/versions/2.6.1/lib/ruby/2.6.0 -r ./siteconf20190213-34122-e636v8.rb extconf.rb | |
| checking for -licui18n… yes | |
| checking for -licui18n… yes | |
| checking for unicode/ucnv.h… no | |
| *************************************************************************************** | |
| *********** icu required (brew install icu4c or apt-get install libicu-dev) *********** | |
| *************************************************************************************** | |
| *** 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=/Users/will/.rbenv/versions/2.6.1/bin/$(RUBY_BASE_NAME) | |
| –with-icu-dir | |
| –without-icu-dir | |
| –with-icu-include | |
| –without-icu-include=${icu-dir}/include | |
| –with-icu-lib | |
| –without-icu-lib=${icu-dir}/lib | |
| –with-icui18nlib | |
| –without-icui18nlib | |
| –with-icui18nlib | |
| –without-icui18nlib | |
| To see why this extension failed to compile, please check the mkmf.log which can be found here: | |
| /Users/will/.rbenv/versions/2.6.1/lib/ruby/gems/2.6.0/extensions/x86_64-darwin-18/2.6.0-static/charlock_holmes-0.7.6/mkmf.log | |
| extconf failed, exit code 1 | |
| Gem files will remain installed in /Users/will/.rbenv/versions/2.6.1/lib/ruby/gems/2.6.0/gems/charlock_holmes-0.7.6 for inspection. | |
| Results logged to /Users/will/.rbenv/versions/2.6.1/lib/ruby/gems/2.6.0/extensions/x86_64-darwin-18/2.6.0-static/charlock_holmes-0.7.6/gem_make.out |
First, make sure you have installed the required dependencies:
brew install xz icu4c
Now, install charlock_holmes:
gem install charlock_holmes -v=0.7.6 -- --with-opt-dir=/usr/local/opt --with-opt-include=/usr/local/opt/icu4c/include --with-opt-lib=/usr/local/opt/icu4c/lib --with-cxxflags=-std=c++11
Will writes 