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

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 following error:

Gem::Ext::BuildError: ERROR: Failed to build gem native extension.

and, following:

An error occurred while installing nio4r (1.0.0), and Bundler cannot continue.
Make sure that `gem install nio4r -v '1.0.0'` succeeds before bundling.

When I try running gem install nio4r -v '1.0.0':

Building native extensions.  This could take a while...
ERROR: Error installing nio4r:
ERROR: Failed to build gem native extension.

When I try running bundle update:

Please make sure you have the correct access rights
and the repository exists.
Retrying git clone 'git@github.com:kshmir/requirejs-rails.git' ....*

Git error: command `git clone 'git@github.com:kshmir/requirejs-rails.git'....  has failed

When I try running bundle update nio4r:

Gem::Ext::BuildError: ERROR: Failed to build gem native extension....
An error occurred while installing eventmachine (1.0.3), and Bundler cannot continue.
Make sure that `gem install eventmachine -v '1.0.3'` succeeds before bundling.

I tried that command too, to no result.

I also tried changing Ruby version:

rvm use 2.2.1 2.2.0 2.0.0 and running the commands above, but it doesn't change anything

Edit:

The output from running bundle install log:

Fetching gem metadata from rubygems....... Fetching version metadata from rubygems... Fetching dependency metadata from rubygems.. Using rake 10.2.2 Using i18n
0.7.0 Using multi_json 1.11.0 Using activesupport 3.2.17 Using builder 3.0.4 Using activemodel 3.2.17 Using erubis 2.7.0 Using journey 1.0.4 Using rack 1.4.5 Using rack-cache 1.2 Using rack-test 0.6.2 Using hike
1.2.3 Using tilt 1.4.1 Using sprockets 2.2.2 Using actionpack 3.2.17 Using mime-types 1.25.1 Using polyglot 0.3.4 Using treetop 1.4.15 Using mail 2.5.4 Using actionmailer 3.2.17 Using arbre 1.0.1 Using sass 3.2.19 Using thor 0.19.1 Using bourbon 3.1.8 Using bcrypt 3.1.7 Using bcrypt-ruby 3.1.5 Using orm_adapter 0.5.0 Using rack-ssl 1.3.4 Using json 1.8.1 Using rdoc 3.12.2 Using railties 3.2.17 Using atomic
1.1.15 Using thread_safe 0.2.0 Using warden 1.2.3 Using devise 3.2.3 Using formtastic 2.2.1 Using has_scope 0.6.0.rc Using responders 1.0.0 Using inherited_resources 1.4.1 Using jquery-rails 2.3.0 Using kaminari 0.15.1 Using arel 3.0.3 Using tzinfo 0.3.39 Using activerecord 3.2.17 Using polyamorous 0.5.0 Using meta_search 1.1.3 Using activeresource 3.2.17 Using bundler 1.8.4 Using rails 3.2.17 Using activeadmin 0.6.2 Using rgeo 0.3.20 Using rgeo-activerecord
0.5.0 Using activerecord-postgis-adapter 0.6.5 Using addressable 2.3.5 Using airbrake 3.1.16 Using descendants_tracker 0.0.3 Using ice_nine
0.11.0 Using axiom-types 0.0.5 Using coderay 1.1.0 Using better_errors 1.1.0 Using debug_inspector 0.0.2 Using binding_of_caller 0.7.2 Using bootstrap-datepicker-rails 1.1.1.8 Using bootstrap-sass 3.1.1.0 Using browser 0.8.0 Using columnize 0.3.6 Using debugger-linecache 1.2.0 Using byebug 2.7.0 Using cancan 1.6.10 Using highline 1.6.21 Using net-ssh 2.8.0 Using net-scp 1.1.2 Using net-sftp 2.1.2 Using net-ssh-gateway 1.2.0 Using capistrano 2.15.5 Using mini_portile 0.5.2 Using nokogiri 1.6.1 Using ffi 1.9.3 Using childprocess 0.5.1 Using rubyzip 1.1.0 Using websocket 1.0.7 Using selenium-webdriver 2.40.0 Using xpath 1.0.0 Using capybara 2.0.2 Using carrierwave 0.10.0 Using carrierwave_backgrounder 0.3.0 Using hitimes 1.2.2 Using timers 4.0.1 Using celluloid 0.16.0

Gem::Ext::BuildError: ERROR: Failed to build gem native extension.

    /home/adrian/.rvm/rubies/ruby-2.2.1/bin/ruby -r ./siteconf20150424-28432-11y95op.rb extconf.rb  checking for rb_thread_blocking_region()... no checking for sys/select.h... yes checking for poll.h... yes checking for sys/epoll.h... yes checking for sys/event.h... no checking for port.h... no checking for sys/resource.h... yes creating Makefile

make "DESTDIR=" clean

make "DESTDIR=" compiling selector.c In file included from nio4r.h:10:0,
                 from selector.c:6: /home/adrian/.rvm/rubies/ruby-2.2.1/include/ruby-2.2.0/ruby/backward/rubyio.h:2:2: warning: #warning use "ruby/io.h" instead of "rubyio.h" [-Wcpp] 
#warning use "ruby/io.h" instead of "rubyio.h"   ^ In file included from selector.c:7:0: /home/adrian/.rvm/rubies/ruby-2.2.1/include/ruby-2.2.0/ruby/backward/rubysig.h:14:2: warning: #warning rubysig.h is obsolete [-Wcpp]  #warning rubysig.h is obsolete   ^ selector.c: In function ‘NIO_Selector_allocate’: selector.c:94:5: warning: dereferencing type-punned pointer will break strict-aliasing rules [-Wstrict-aliasing]
     ev_init(&selector->timer, NIO_Selector_timeout_callback);
     ^ selector.c:94:5: warning: dereferencing type-punned pointer will break strict-aliasing rules [-Wstrict-aliasing] selector.c:94:5: warning: dereferencing type-punned pointer will break strict-aliasing rules [-Wstrict-aliasing] selector.c:99:5: warning: dereferencing type-punned pointer will break strict-aliasing rules [-Wstrict-aliasing]
     ev_io_init(&selector->wakeup, NIO_Selector_wakeup_callback, selector->wakeup_reader, EV_READ);
     ^ selector.c:99:5: warning: dereferencing type-punned pointer will break strict-aliasing rules [-Wstrict-aliasing] selector.c:99:5: warning: dereferencing type-punned pointer will break strict-aliasing rules [-Wstrict-aliasing] selector.c: In function ‘NIO_Selector_synchronize’: selector.c:159:11: warning: variable ‘current_thread’ set but not used [-Wunused-but-set-variable]
     VALUE current_thread, lock_holder, lock;
           ^ selector.c: In function ‘NIO_Selector_deregister_synchronized’: selector.c:241:11: warning: unused variable ‘monitor_args’ [-Wunused-variable]
     VALUE monitor_args[3];
           ^ selector.c:240:21: warning: unused variable ‘interests’ [-Wunused-variable]
     VALUE self, io, interests, selectables, monitor;
                     ^ selector.c: In function ‘NIO_Selector_select’: selector.c:268:20: warning: unused variable ‘array’ [-Wunused-variable]
     VALUE timeout, array;
                    ^ selector.c: In function ‘NIO_Selector_select_synchronized’: selector.c:286:9: warning: unused variable ‘i’ [-Wunused-variable]
     int i, ready;
         ^ selector.c: In function ‘NIO_Selector_run’: selector.c:326:5: warning: ISO C90 forbids mixed declarations and code [-Wdeclaration-after-statement]
     ev_tstamp started_at = ev_now(selector->ev_loop);
     ^ selector.c:341:9: error: ‘TRAP_BEG’ undeclared (first use in this function)
         TRAP_BEG;
         ^ selector.c:341:9: note: each undeclared identifier is reported only once for each function it appears in selector.c:343:9: error: ‘TRAP_END’ undeclared (first use in this function)
         TRAP_END;
         ^ selector.c:347:9: warning: dereferencing type-punned pointer will break strict-aliasing rules [-Wstrict-aliasing]
         ev_timer_init(&selector->timer, NIO_Selector_timeout_callback, BUSYWAIT_INTERVAL, BUSYWAIT_INTERVAL);
         ^ selector.c:347:9: warning: dereferencing type-punned pointer will break strict-aliasing rules [-Wstrict-aliasing] selector.c:347:9: warning: dereferencing type-punned pointer will break strict-aliasing rules [-Wstrict-aliasing] selector.c:347:9: warning: dereferencing type-punned pointer will break strict-aliasing rules [-Wstrict-aliasing] selector.c: In function ‘NIO_Selector_close’: selector.c:391:5: warning: passing argument 2 of ‘NIO_Selector_synchronize’ from incompatible pointer type [enabled by default]
     return NIO_Selector_synchronize(self, NIO_Selector_close_synchronized, self);
     ^ selector.c:157:14: note: expected ‘VALUE (*)(VALUE *)’ but argument is of type ‘VALUE (*)(VALUE)’  static VALUE NIO_Selector_synchronize(VALUE self, VALUE (*func)(VALUE *args), VALUE
*args)
              ^ selector.c:391:5: warning: passing argument 3 of ‘NIO_Selector_synchronize’ makes pointer from integer without a cast [enabled by default]
     return NIO_Selector_synchronize(self, NIO_Selector_close_synchronized, self);
     ^ selector.c:157:14: note: expected ‘VALUE *’ but argument is of type ‘VALUE’  static VALUE NIO_Selector_synchronize(VALUE self, VALUE (*func)(VALUE *args), VALUE *args)
              ^ selector.c: In function ‘NIO_Selector_closed’: selector.c:407:5: warning: passing argument 2 of ‘NIO_Selector_synchronize’ from incompatible pointer type [enabled by default]
     return NIO_Selector_synchronize(self, NIO_Selector_closed_synchronized, self);
     ^ selector.c:157:14: note: expected ‘VALUE (*)(VALUE *)’ but argument is of type ‘VALUE (*)(VALUE)’  static VALUE NIO_Selector_synchronize(VALUE self, VALUE (*func)(VALUE *args), VALUE
*args)
              ^ selector.c:407:5: warning: passing argument 3 of ‘NIO_Selector_synchronize’ makes pointer from integer without a cast [enabled by default]
     return NIO_Selector_synchronize(self, NIO_Selector_closed_synchronized, self);
     ^ selector.c:157:14: note: expected ‘VALUE *’ but argument is of type ‘VALUE’  static VALUE NIO_Selector_synchronize(VALUE self, VALUE (*func)(VALUE *args), VALUE *args)
              ^ selector.c: In function ‘NIO_Selector_wakeup’: selector.c:384:10: warning: ignoring return value of ‘write’, declared with attribute warn_unused_result [-Wunused-result]
     write(selector->wakeup_writer, "\0", 1);
          ^ make: *** [selector.o] Error 1

make failed, exit code 2

Gem files will remain installed in /home/adrian/.rvm/gems/ruby-2.2.1/gems/nio4r-1.0.0 for inspection. Results logged to /home/adrian/.rvm/gems/ruby-2.2.1/extensions/x86_64-linux/2.2.0/nio4r-1.0.0/gem_make.out An error occurred while installing nio4r (1.0.0), and Bundler cannot continue. Make sure that `gem install nio4r -v '1.0.0'` succeeds before bundling.