pi@raspberrypi:~$ gem install do_sqlite3 -v 0.10.14
Building native extensions.  This could take a while...
ERROR:  Error installing do_sqlite3:
        ERROR: Failed to build gem native extension.

    /home/pi/.rbenv/versions/2.1.3/bin/ruby extconf.rb
checking for sqlite3.h... no
*** 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/pi/.rbenv/versions/2.1.3/bin/ruby
        --with-sqlite3-dir
        --without-sqlite3-dir
        --with-sqlite3-include
        --without-sqlite3-include=${sqlite3-dir}/include
        --with-sqlite3-lib
        --without-sqlite3-lib=${sqlite3-dir}/lib

extconf failed, exit code 1

Gem files will remain installed in /home/pi/.rbenv/versions/2.1.3/lib/ruby/gems/2.1.0/gems/do_sqlite3-0.10.14 for inspection.
Results logged to /home/pi/.rbenv/versions/2.1.3/lib/ruby/gems/2.1.0/extensions/armv6l-linux/2.1.0-static/do_sqlite3-0.10.14/gem_make.out