~ gem install ghpreview
Fetching: listen-0.6.0.gem (100%)
Fetching: rb-fsevent-0.9.2.gem (100%)
Fetching: gemoji-1.3.0.gem (100%)
Fetching: github-markdown-0.5.3.gem (100%)
Building native extensions. This could take a while...
Fetching: sanitize-2.0.3.gem (100%)
Fetching: charlock_holmes-0.6.9.gem (100%)
Building native extensions. This could take a while...
ERROR: Error installing ghpreview:
ERROR: Failed to build gem native extension.
/Users/pairing/.rvm/rubies/ruby-1.9.3-p327/bin/ruby extconf.rb
checking for main() in -licui18n... no
checking for main() in -licui18n... 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/pairing/.rvm/rubies/ruby-1.9.3-p327/bin/ruby
--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
Gem files will remain installed in /Users/pairing/.rvm/gems/ruby-1.9.3-p327/gems/charlock_holmes-0.6.9 for inspection.
Results logged to /Users/pairing/.rvm/gems/ruby-1.9.3-p327/gems/charlock_holmes-0.6.9/ext/charlock_holmes/gem_make.out
...OR ELSE...