sinatraでSQLite3が必要になるのでインストールしようとしました。

Building native extensions.  This could take a while...
ERROR:  Error installing sqlite3:
	ERROR: Failed to build gem native extension.

    current directory: /usr/local/src/rbenv/versions/2.3.0/lib/ruby/gems/2.3.0/gems/sqlite3-1.3.11/ext/sqlite3
/usr/local/src/rbenv/versions/2.3.0/bin/ruby -r ./siteconf20160306-23786-15hjygh.rb extconf.rb
checking for sqlite3.h... no
sqlite3.h is missing. Try 'port install sqlite3 +universal',
'yum install sqlite-devel' or 'apt-get install libsqlite3-dev'
and check your shared library search path (the
location where your sqlite3 shared library is located).
*** 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/local/src/rbenv/versions/2.3.0/bin/$(RUBY_BASE_NAME)
	--with-sqlite3-dir
	--without-sqlite3-dir
	--with-sqlite3-include
	--without-sqlite3-include=${sqlite3-dir}/include
	--with-sqlite3-lib
	--without-sqlite3-lib=${sqlite3-dir}/lib

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

  /usr/local/src/rbenv/versions/2.3.0/lib/ruby/gems/2.3.0/extensions/x86_64-linux/2.3.0-static/sqlite3-1.3.11/mkmf.log

extconf failed, exit code 1

Gem files will remain installed in /usr/local/src/rbenv/versions/2.3.0/lib/ruby/gems/2.3.0/gems/sqlite3-1.3.11 for inspection.
Results logged to /usr/local/src/rbenv/versions/2.3.0/lib/ruby/gems/2.3.0/extensions/x86_64-linux/2.3.0-static/sqlite3-1.3.11/gem_make.out

普通にエラーがでました。調べて見るとどうやらsqlite-develがないのだとか・
http://blog.sojiro.me/blog/2014/11/10/making-first-app-with-rails-number-1-setup-rails/
yum install sqlite-devel

インストールできました。