Gem therubyracer does not install even if libv8 is installed

Question

I have installed libv8 gem on windows by using this command:

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

Then when I try to install therubyracer it gives me 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

What I understood is that therubyracer wants to find v8. I have installed Node.js which already has it. Is it even possible to use it? Or there are other solutions for therubyracer?

Answer 1

This bug appears in OS X El Capitan. Just use [email protected] for therubyracer.

brew install [email protected]
bundle config --local build.libv8 --with-system-v8
bundle config --local build.therubyracer --with-v8-dir=/usr/local/opt/[email protected]
bundle install

Check detail of this issue

Answer 2

On MacOS Mojave this works ok:

1. install [email protected]

   brew install [email protected]
   

2. edit profile(in my case vi ~/.zshrc) and add this:

   export PATH="/usr/local/opt/[email protected]/bin:$PATH"
   export LDFLAGS="-L/usr/local/opt/[email protected]/lib"
   export CPPFLAGS="-I/usr/local/opt/[email protected]/include"
   

3. install therubyracer version in this case 0.12.2:

   gem install therubyracer -v '0.12.2' -- --with-v8-dir=/usr/local/opt/[email protected]