Issue Installing on Raspberry Pi

[Lynchmenow]

I have been trying to get Dashing going on a Raspberry Pi but can't get past this issue.

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

current directory: /var/lib/gems/2.3.0/gems/eventmachine-1.2.5/ext
/usr/bin/ruby2.3 -r ./siteconf20170806-7796-1b94ap9.rb extconf.rb
*** 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}/lib
    --with-make-prog
    --without-make-prog
    --srcdir=.
    --curdir
    --ruby=/usr/bin/$(RUBY_BASE_NAME)2.3
    --with-ssl-dir
    --without-ssl-dir
    --with-ssl-include
    --without-ssl-include=${ssl-dir}/include
    --with-ssl-lib
    --without-ssl-lib=${ssl-dir}/lib
    --with-openssl-config
    --without-openssl-config
    --with-pkg-config
    --without-pkg-config
/usr/lib/ruby/2.3.0/mkmf.rb:456:in `try_do': The compiler failed to generate an executable file. 
(RuntimeError)
You have to install development tools first.
    from /usr/lib/ruby/2.3.0/mkmf.rb:541:in `try_link0'
    from /usr/lib/ruby/2.3.0/mkmf.rb:556:in `try_link'
    from /usr/lib/ruby/2.3.0/mkmf.rb:657:in `try_ldflags'
    from /usr/lib/ruby/2.3.0/mkmf.rb:1813:in `pkg_config'
    from extconf.rb:65:in `pkg_config_wrapper'
    from extconf.rb:92:in `<main>'

To see why this extension failed to compile, please check the mkmf.log which can be found here:

/var/lib/gems/2.3.0/extensions/arm-linux/2.3.0/eventmachine-1.2.5/mkmf.log

extconf failed, exit code 1

Gem files will remain installed in /var/lib/gems/2.3.0/gems/eventmachine-1.2.5 for inspection.
Results logged to /var/lib/gems/2.3.0/extensions/arm-linux/2.3.0/eventmachine-
1.2.5/gem_make.out`

Can someone please help?

[lepetitcreole]

Hi, I had the same issue. To solve it :
sudo apt-get install ruby-dev