How to install therubyracer gem on 10.10 Yosemite?

I don't manage to install therubyracer gem on Yosemite 10.10.

Here is the log:

11:53  $ gem install libv8 -v '3.16.14.3' -- --with-system-v8

Building native extensions with: '--with-system-v8'
This could take a while...
Successfully installed libv8-3.16.14.3
Parsing documentation for libv8-3.16.14.3
Installing ri documentation for libv8-3.16.14.3
Done installing documentation for libv8 after 0 seconds
1 gem installed
02:05  $ gem install therubyracer -v '0.12.1' -- --with-system-v8
Building native extensions with: '--with-system-v8'
This could take a while...
ERROR:  Error installing therubyracer:
ERROR: Failed to build gem native extension.
/usr/local/var/rbenv/versions/2.1.2/bin/ruby extconf.rb --with-system-v8

checking for main() in -lpthread... yes
checking for main() in -lobjc... 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=/usr/local/var/rbenv/versions/2.1.2/bin/ruby
--with-pthreadlib
--without-pthreadlib
--with-objclib
--without-objclib
--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
/usr/local/var/rbenv/versions/2.1.2/lib/ruby/gems/2.1.0/gems/libv8-3.16.14.3/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 3.16.14.3 installed. You may
need to special --with-v8-dir options if it is in a non-standard
location
thanks,
The Mgmt
from /usr/local/var/rbenv/versions/2.1.2/lib/ruby/gems/2.1.0/gems/libv8-3.16.14.3/lib/libv8.rb:7:in `configure_makefile'
from extconf.rb:32:in `<main>'

extconf failed, exit code 1
Gem files will remain installed in /usr/local/var/rbenv/versions/2.1.2/lib/ruby/gems/2.1.0/gems/therubyracer-0.12.1 for inspection.
Results logged to /usr/local/var/rbenv/versions/2.1.2/lib/ruby/gems/2.1.0/extensions/x86_64-darwin-14/2.1.0-static/therubyracer-0.12.1/gem_make.out

gem uninstall libv8
brew install v8
gem install therubyracer
gem install libv8 -v '3.16.14.3' -- --with-system-v8

this is the only way it worked for me on 10.10 (ruby 2.1.2)

Or try gem install libv8 -v 'XX.XX.XX' -- --with-system-v8 adding the version of the gem :)

UPDATE for Mac OS Catalina:

brew tap homebrew/versions
brew install v8@3.15
brew link --force v8@3.15
gem install libv8 -v 'XX.XX.XX' -- --with-system-v8
gem install therubyracer

git clone https://github.com/cowboyd/libv8.git
cd libv8
bundle install
bundle exec rake clean build binary
gem install pkg/libv8-3.16.14.3-x86_64-darwin-12.gem #note that libv8 version may change, so tab through files in pkg/, also remember to use the one with version specified

then just bundle your project gems

this is the only way it worked for me on 10.10 (ruby 2.1.2)

None of the answers work for me this time. I have too use this:

brew tap homebrew/versions
brew install v8-315

gem install libv8 -v '3.16.14.13' -- --with-system-v8
gem install therubyracer -- --with-v8-dir=/usr/local/opt/v8-315

bundle install

Seen on the rubyracer Github issues.

Hope it helps someone else.

Maybe it will be useful for someone but I had problems installing therubyracer (because of the problems with libv8) the solution was to uninstall all the libv8 that I had installed. Install therubyracer

$ gem uninstall libv8
$ gem install therubyracer -v '0.12.0'
Fetching: libv8-3.16.14.7-x86_64-darwin-14.gem ( 57%)
Fetching: libv8-3.16.14.7-x86_64-darwin-14.gem (100%)
Successfully installed libv8-3.16.14.7-x86_64-darwin-14
Building native extensions.  This could take a while...
Successfully installed therubyracer-0.12.0
2 gems installed

I hope this helps someone.

It seems like this has been fixed upstream. What worked for me and @aurels and @Mike Causer and @Juanda was:

bundle update libv8

This worked for me very well on my Yosemite and Ruby 2.1.5 (Ruby through RVM)

gem install libv8 -v '3.16.14.3' -- --with-system-v8

Earlier it was giving me error Gem::Ext::BuildError: ERROR: Failed to build gem native extension. for libv8 gem version 3.16.14.3

Only this works for me in my Yosemite, Ruby 2.1.2:

gem install libv8 -v '3.16.14.3' -- --with-system-v8
brew link --overwrite v8-315 --force
gem install therubyracer -v '0.12.2' -- --with-system-v8

I was able to proceed with ruby racer after rm Gemfile.lock

beforehand: I installed v8 via brew install v8, and then did gem install libv8 -v '3.16.14.3' -- --with-system-v8

and I am running 10.10 Yosemite

They have corrected this issue in the most recent version of libv8. See: https://github.com/cowboyd/libv8/issues/123

You should install from the github repo, in rails I added a line to my gemfile like this gem "libv8", git: "git://github.com/cowboyd/libv8.git", submodules: true

EDIT:

This apparently only solves some of the problem. I installed the new version of libv8, but now the rubyracer is still looking for the other one I think? Still looking into it.

I had the same issue on Yosemite. My solution is similar to what appears above.

Use gem uninstall libv8 to remove anything that might be installed.

Leave therubyracer in your Gemfile, but remove any explicit reference to libv8.

Run bundle install.

libv8 then installed fine as a dependency.

Updated answer for 2018.

I'm on High Sierra, on Homebrew 1.6.1

brew install v8-315

gem install libv8 -v '3.16.14.13' -- --with-system-v8
gem install therubyracer -- --with-v8-dir=/usr/local/opt/v8@3.15/

Is what worked for me.

Credit goes to @coding-addicted for his original answer.

After hours of trying simply upgrading ruby worked:

brew install ruby 

and then adding the following to gem file:

gem 'libv8'  
gem 'therubyracer' 

A heads up to anyone that might have been having my issue: I ended up uninstalling my ruby version in RVM and then reinstalling it. That seemed to use the correct dependancies in the latest version of xcode tools for compiling ruby.

rvm list
rvm uninstall ruby-x.x.x
rvm install ruby-x.x.x

I did the following

gem install therubyracer

which now installs therubyracer 0.12.1 which installs the dependency libv8 (3.16.14.7 x86_64-darwin-14) which installed with no errors.

I did this using ruby 2.1.5 which I installed via:

CC=/usr/bin/gcc rbenv install 2.1.5

which I did after running brew upgrade ruby-builds.

After installing ruby 2.1.5, I also ran

gem upgrade --system

to get rubygems-update 2.4.5

this happens due to some conflicts with the libv8 as well, although you can just assign a version to the rubyracer and it will be installed:

change the following in the gemfile:

gem 'therubyracer', '~> 0.12.1'

and do bundle install

What worked for me, based on the following comment,

https://github.com/cowboyd/therubyracer/issues/304#issuecomment-62046085

was to remove Gemfile.lock and then run bundle install

This solution worked for me following Jakub Troszok's solution above with just a minor change

gem uninstall libv8
gem install therubyracer -v '0.12.1'
    Fetching: libv8-3.16.14.19-x86_64-darwin-18.gem (100%)
    Successfully installed libv8-3.16.14.19-x86_64-darwin-18
    Building native extensions.  This could take a while...
    Successfully installed therubyracer-0.12.1
    Parsing documentation for libv8-3.16.14.19-x86_64-darwin-18
    Installing ri documentation for libv8-3.16.14.19-x86_64-darwin-18
    Parsing documentation for therubyracer-0.12.1
    Installing ri documentation for therubyracer-0.12.1
    Done installing documentation for libv8, therubyracer after 0 seconds
    2 gems installed
gem install libv8 -v '3.16.14.17' -- --with-system-v8  (if the libv8 version required for your project is different from the one installed by rubyracer)
bundle install

Using homebrew's directory of v8 for --with-v8-dir=/usr/local/Cellar/[email protected]/3.15.11.18_1, instead of /usr/local/opt/v8-315, is what worked for me, in coding addicted's answer.

This is visible in the Summary of the brew install command, brew install v8-315.