rails 5.0.0 when installing “nio4r” : Failed to build gem native extension

Question

Here is the logs: http://pastebin.com/CAgur9xd

Installing nio4r 1.2.1 with native extensions

Gem::Ext::BuildError: ERROR: Failed to build gem native extensi         


        

Answer 1

Had this same issue on Ubuntu 16.04. What I did to fix this :

Remove Gemfile.lock : sudo rm Gemfile.lock Installed Ruby-Dev:

sudo apt-add-repository ppa:brightbox/ruby-ng sudo apt-get update sudo apt-get install ruby2.4-dev

and the important step : REBOOT!