[john@xeonpwr embed]$ cat embed.rb
require 'ffi'

Hello module
  extend FFI::Library
  ffi_lib 'target/release/libembed.dylib'
  attach_function : process, [],:void
end

Hello .process

puts 'Completed!'
[john@xeonpwr embed]$ ruby embed.rb
embed.rb:4: class/module name must be CONSTANT
  extend FFI::Library
embed.rb:6: syntax error, unexpected ':', expecting `end'
  attach_function : process, [],:void
embed.rb:6: syntax error, unexpected ',', expecting '.' or &. or :: or '['
... attach_function : process, [],:void