puma gem - Failed to build gem native extension

Question

I was getting the following error while installing puma gem

    $ gem install puma
    Fetching: puma-2.11.2.gem (100%)
    Building native extensions.  This coul         


        

Answer 1

When using bundler and homebrew:

$ bundle config build.puma --with-cppflags=-I$(brew --prefix openssl)/include
$ bundle install

I copied and adapted this answer from Lloeki here: https://stackoverflow.com/a/31516586/704499