Fedora 24 - Ruby on Rails installation error - ruby-on-rails

Question

I tried install rails on my fresh Fedora 24 instalation . I followed this tutorial https://developer.fedoraproject.org/tech/languages/ruby/ror-installation.html .
But I got this error:
Building native extensions. This could take a while...
ERROR: Error installing rails:
ERROR: Failed to build gem native extension.
current directory: /usr/local/share/gems/gems/nio4r-1.2.1/ext/nio4r
/usr/bin/ruby -r ./siteconf20160918-22847-14vriyi.rb extconf.rb
checking for unistd.h... *** extconf.rb failed ***
Could not create Makefile due to some reason, probably lack of necessary
libraries and/or headers. Check the mkmf.log file for more details. You may
need configuration options.
Provided configuration options:
--with-opt-dir
--without-opt-dir
--with-opt-include
--without-opt-include=${opt-dir}/include
--with-opt-lib
--without-opt-lib=${opt-dir}/lib64
--with-make-prog
--without-make-prog
--srcdir=.
--curdir
--ruby=/usr/bin/$(RUBY_BASE_NAME)
/usr/share/ruby/mkmf.rb:456:in `try_do': The compiler failed to generate an executable file. (RuntimeError)
You have to install development tools first.
from /usr/share/ruby/mkmf.rb:587:in `try_cpp'
from /usr/share/ruby/mkmf.rb:1091:in `block in have_header'
from /usr/share/ruby/mkmf.rb:942:in `block in checking_for'
from /usr/share/ruby/mkmf.rb:350:in `block (2 levels) in postpone'
from /usr/share/ruby/mkmf.rb:320:in `open'
from /usr/share/ruby/mkmf.rb:350:in `block in postpone'
from /usr/share/ruby/mkmf.rb:320:in `open'
from /usr/share/ruby/mkmf.rb:346:in `postpone'
from /usr/share/ruby/mkmf.rb:941:in `checking_for'
from /usr/share/ruby/mkmf.rb:1090:in `have_header'
from extconf.rb:3:in `<main>'
To see why this extension failed to compile, please check the mkmf.log which can be found here:
/usr/local/lib64/gems/ruby/nio4r-1.2.1/mkmf.log
extconf failed, exit code 1
Gem files will remain installed in /usr/local/share/gems/gems/nio4r-1.2.1 for inspection.
Results logged to /usr/local/lib64/gems/ruby/nio4r-1.2.1/gem_make.out
I googled solution but I wasn't successful. Can you please give me advice?
Thanks

Answer 1

Have you installed "development tools", per the error message in your logs?
The compiler failed to generate an executable file. (RuntimeError)
You have to install development tools first.
From the linked Fedora ROR installation guide:
sudo dnf group install "C Development Tools and Libraries"