error

charles@charles-desktop:~/code/chatdoe$ gem install rwx -v '0.0.1.1.dev'
Building native extensions.  This could take a while...
ERROR:  Error installing rwx:
	ERROR: Failed to build gem native extension.

    /home/charles/.rvm/rubies/ruby-2.2.1/bin/ruby -r ./siteconf20150924-19683-1gmhhqy.rb extconf.rb
checking for wx-config... yes
checking for gcc... yes
checking for g++... yes
checking for wx/preferences.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}/lib
	--with-make-prog
	--without-make-prog
	--srcdir=.
	--curdir
	--ruby=/home/charles/.rvm/rubies/ruby-2.2.1/bin/$(RUBY_BASE_NAME)
	--with-rwx-dir
	--without-rwx-dir
	--with-rwx-include
	--without-rwx-include=${rwx-dir}/include
	--with-rwx-lib
	--without-rwx-lib=${rwx-dir}/lib
	--with-gtk+-x11-2.0-config
	--without-gtk+-x11-2.0-config
	--with-pkg-config
	--without-pkg-config
	--with-gdk-x11-2.0-config
	--without-gdk-x11-2.0-config
/home/charles/.rvm/rubies/ruby-2.2.1/lib/ruby/2.2.0/mkmf.rb:456:in `try_do': The compiler failed to generate an executable file. (RuntimeError)
You have to install development tools first.
	from /home/charles/.rvm/rubies/ruby-2.2.1/lib/ruby/2.2.0/mkmf.rb:587:in `try_cpp'
	from /home/charles/.rvm/rubies/ruby-2.2.1/lib/ruby/2.2.0/mkmf.rb:1060:in `block in have_header'
	from /home/charles/.rvm/rubies/ruby-2.2.1/lib/ruby/2.2.0/mkmf.rb:911:in `block in checking_for'
	from /home/charles/.rvm/rubies/ruby-2.2.1/lib/ruby/2.2.0/mkmf.rb:351:in `block (2 levels) in postpone'
	from /home/charles/.rvm/rubies/ruby-2.2.1/lib/ruby/2.2.0/mkmf.rb:321:in `open'
	from /home/charles/.rvm/rubies/ruby-2.2.1/lib/ruby/2.2.0/mkmf.rb:351:in `block in postpone'
	from /home/charles/.rvm/rubies/ruby-2.2.1/lib/ruby/2.2.0/mkmf.rb:321:in `open'
	from /home/charles/.rvm/rubies/ruby-2.2.1/lib/ruby/2.2.0/mkmf.rb:347:in `postpone'
	from /home/charles/.rvm/rubies/ruby-2.2.1/lib/ruby/2.2.0/mkmf.rb:910:in `checking_for'
	from /home/charles/.rvm/rubies/ruby-2.2.1/lib/ruby/2.2.0/mkmf.rb:1059:in `have_header'
	from extconf.rb:71:in `block in <main>'
	from /home/charles/.rvm/rubies/ruby-2.2.1/lib/ruby/2.2.0/mkmf.rb:619:in `with_cflags'
	from extconf.rb:67:in `<main>'

extconf failed, exit code 1

Gem files will remain installed in /home/charles/.rvm/gems/ruby-2.2.1/gems/rwx-0.0.1.1.dev for inspection.
Results logged to /home/charles/.rvm/gems/ruby-2.2.1/extensions/x86_64-linux/2.2.0/rwx-0.0.1.1.dev/gem_make.out
charles@charles-desktop:~/code/chatdoe$