Gem therubyracer is not installed, even if libv8 is installed

Question

I installed libv8 gem on windows using this command:

 gem install libv8 -- --with-system-v8 

Then, when I try to install therubyracer , it gives me a long error message:

 Installing therubyracer 0.12.2 with native extensions Gem::Ext::BuildError: ERROR: Failed to build gem native extension. current directory: D:/Ruby21-x64/lib/ruby/gems/2.1.0/gems/therubyracer- 0.12.2/ext/v8 D:/Ruby21-x64/bin/ruby.exe -r ./siteconf20160105-4924-101vdyd.rb extconf.rb checking for main() in -lpthread... yes checking for v8.h... no *** 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=D:/Ruby21-x64/bin/ruby --with-pthreadlib --without-pthreadlib --enable-debug --disable-debug --with-v8-dir --without-v8-dir --with-v8-include --without-v8-include=${v8-dir}/include --with-v8-lib --without-v8-lib=${v8-dir}/lib D:/Ruby21-x64/lib/ruby/gems/2.1.0/gems/libv8-3.16.14.13/ext/libv8/location.rb:50:in `configure': You have chosen to use the version of V8 found on your system (Libv8::Location::System::NotFoundError) and *not* the one that is bundle with the libv8 rubygem. However, it could not be located. please make sure you have a version of v8 that is compatible with 3.16.14.13 installed. You may need to special --with-v8-dir options if it is in a non-standard location thanks, The Mgmt 

I realized that therubyracer wants to find v8 . I installed Node.js, which already has it. Is it even possible to use it? Or are there other corn solutions?

Answer 1

This error appears in OS X El Capitan. Just use v8@3.15 for therubyracer .

 brew install v8@3.15 bundle config --local build.libv8 --with-system-v8 bundle config --local build.therubyracer --with-v8-dir=/usr/local/opt/ v8@3.15 bundle install 

Check the details of this issue.