Bundle install: ERROR: Failed to build gem native extension. nio4r gem

Question

I\'m currently working on a project using:

• rvm 1.26.11
• ruby 2.2.1p85

I tried to run bundle install but keep getting the follow

Answer 1

Works fine with macOS Sierra (10.12.2) after running the following command:

xcode-select --install

Before i had:

An error occurred while installing nio4r (1.2.1), and Bundler cannot continue.

Answer 2

If you are working on Mac OSX above version 10.11.x, the following approach worked for me:

gem install nio4r -v '1.1.0' -- with-cflags="-std=c99"

Answer 3

Setting the bundle config didn't work for me...

If you've recently updated Xcode, make sure to actually run the application and accept the terms of service.

In my bundle error, I was getting You have to install development tools first.

Answer 4

bundle config build.nio4r --with-cflags="-std=c99"
bundle install

works for me

Answer 5

I solved it with:

sudo apt-get install libmysqlclient-dev
sudo apt-get install libpq-dev
sudo apt-get install libsqlite3-dev
sudo apt-get install libev-dev
rvm use 2.0.0
Reboot pc

If I run rails -v shows me:

• Rails 3.2.17

And now I can make Bundle install

I think the rails version was in conflict. I don't know why, maybe anyone can explain me.

Answer 6

Update to version 1.0.4 if you're using Ruby 2.2.1