How can I install gem libv8 in Mac OS Big Sur 11.0?

Question

When I try to install the libv8 gem version 7.3.492.27.1 with command

gem install libv8 -v '7.3.492.27.1'

it fails with

unable to fetch v8 source

How can I install libv8 in Mac OS Big Sur 11.0?

Answer 1

You can install the binary build of the gem provided by Loic Nageleisen

https://github.com/rubyjs/libv8/issues/305

Search in there the file

 https://www.dropbox.com/s/wuwuqhaqcate8k5/libv8-8.4.255.0-x86_64-darwin-20.gem?dl=0

download and install with

gem install path-to-gem-file/libv8-8.4.255.0-x86_64-darwin-20.gem

Then you already have libv8 working in Mac OS Big Sur 11.0

In your Gemfile.lock there should be

GEM
  specs
    ...
    libv8 (7.3.492.27.1-x86_64-darwin-20)
    ...

PLATFORMS
  ...
  x86_64-darwin-20
  ....