packager-ruby-error

gistfile1.txt

oot@ip-172-30-0-137:/opt/ruby-2.1/bin# ./gem install ffi -v '1.9.6'
Building native extensions.  This could take a while...
ERROR:  Error installing ffi:
	ERROR: Failed to build gem native extension.

    /opt/ruby-2.1/bin/ruby extconf.rb
checking for ffi.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=/opt/ruby-2.1/bin/ruby
	--with-ffi_c-dir
	--without-ffi_c-dir
	--with-ffi_c-include
	--without-ffi_c-include=${ffi_c-dir}/include
	--with-ffi_c-lib
	--without-ffi_c-lib=${ffi_c-dir}/lib
	--with-libffi-config
	--without-libffi-config
	--with-pkg-config
	--without-pkg-config
/opt/ruby-2.1/lib/ruby/2.1.0/mkmf.rb:456:in `try_do': The compiler failed to generate an executable file. (RuntimeError)
You have to install development tools first.
	from /opt/ruby-2.1/lib/ruby/2.1.0/mkmf.rb:587:in `try_cpp'
	from /opt/ruby-2.1/lib/ruby/2.1.0/mkmf.rb:1067:in `block in have_header'
	from /opt/ruby-2.1/lib/ruby/2.1.0/mkmf.rb:918:in `block in checking_for'
	from /opt/ruby-2.1/lib/ruby/2.1.0/mkmf.rb:351:in `block (2 levels) in postpone'
	from /opt/ruby-2.1/lib/ruby/2.1.0/mkmf.rb:321:in `open'
	from /opt/ruby-2.1/lib/ruby/2.1.0/mkmf.rb:351:in `block in postpone'
	from /opt/ruby-2.1/lib/ruby/2.1.0/mkmf.rb:321:in `open'
	from /opt/ruby-2.1/lib/ruby/2.1.0/mkmf.rb:347:in `postpone'
	from /opt/ruby-2.1/lib/ruby/2.1.0/mkmf.rb:917:in `checking_for'
	from /opt/ruby-2.1/lib/ruby/2.1.0/mkmf.rb:1066:in `have_header'
	from extconf.rb:16:in `<main>'

extconf failed, exit code 1

Gem files will remain installed in /opt/ruby-2.1/lib/ruby/gems/2.1.0/gems/ffi-1.9.6 for inspection.
Results logged to /opt/ruby-2.1/lib/ruby/gems/2.1.0/extensions/x86_64-linux/2.1.0-static/ffi-1.9.6/gem_make.out