passenger-error

anonymous-gist.

(staging-web) root@ip-10-0-1-132 /var/log/nginx# cat /tmp/passenger_native_support-rmfgcc.log
# mkdir -p /home/neighborland/.passenger/native_support/4.0.48/ruby-2.1.2-x86_64-linux-gnu
# cd /home/neighborland/.passenger/native_support/4.0.48/ruby-2.1.2-x86_64-linux-gnu
# /usr/bin/ruby2.1 /usr/share/passenger/ruby_extension_source/extconf.rb
checking for alloca.h... *** /usr/share/passenger/ruby_extension_source/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=/usr/share/passenger/ruby_extension_source
        --curdir
        --ruby=/usr/bin/ruby2.1
/usr/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 /usr/lib/ruby/2.1.0/mkmf.rb:587:in `try_cpp'
        from /usr/lib/ruby/2.1.0/mkmf.rb:1067:in `block in have_header'
        from /usr/lib/ruby/2.1.0/mkmf.rb:918:in `block in checking_for'
        from /usr/lib/ruby/2.1.0/mkmf.rb:351:in `block (2 levels) in postpone'
        from /usr/lib/ruby/2.1.0/mkmf.rb:321:in `open'
        from /usr/lib/ruby/2.1.0/mkmf.rb:351:in `block in postpone'
        from /usr/lib/ruby/2.1.0/mkmf.rb:321:in `open'
        from /usr/lib/ruby/2.1.0/mkmf.rb:347:in `postpone'
        from /usr/lib/ruby/2.1.0/mkmf.rb:917:in `checking_for'
        from /usr/lib/ruby/2.1.0/mkmf.rb:1066:in `have_header'
        from /usr/share/passenger/ruby_extension_source/extconf.rb:37:in `<main>'

Does anyone have have a solution for this problem? I am running into the same one, but with different version numbers.