Error installing libv8: ERROR: Failed to build gem native extension

Question

I made a rails project with,

rails new test_bootstrap.

succeeded.

moved to the project dir and added the gems

gem \         


        

Answer 1

I tried the solution listed above command which looks very fine for installing individual gem, but for bundler users - you should use bundle config

Use

bundle config build.libv8 --with-system-v8 

and

bundle config build.therubyracer --with-system-v8

to configure bundler to take the parameters to be used while installing specific gem

Answer 2

Try with

gem "therubyracer", "~> 0.10.2" to Gemfile

And it will install dependent gem libv8 (3.3.10.4) and the issue of build gem native extension failure got resolve.

Answer 3

I also had problems using libv8 and mini_racer. Resolved the problem with

brew install v8

bundle update libv8 mini_racer

Using the latest versions mini_racer 0.2.10 and libv8 7.3.492.27 worked like a charm.

Answer 4

I do not think you need therubyracer gem on windows. It is a javascript runtime using V8 engine. Hence it is making an attempt to install libv8.

You can safely remove the gem from your Gemfile.

Rails is happy to use which ever runtime it can find. execjs,nodejs etc. are all possible options.

Microsoft already embeds JScript runtime for javascript on windows, and Rails uses it. See this for more