error installing gem taps

➜  ~rvm_rvmrc_cwd git:(master) gem install taps

Building native extensions.  This could take a while…

ERROR:  Error installing taps:

ERROR: Failed to build gem native extension.

/home/rajib/.rvm/rubies/ruby-1.9.2-p136/bin/ruby extconf.rb

checking for sqlite3.h… no

sqlite3.h is missing. Try ‘port install sqlite3 +universal’

or ‘yum install sqlite3-devel’ 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=/home/rajib/.rvm/rubies/ruby-1.9.2-p136/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

Gem files will remain installed in /home/rajib/.rvm/gems/ruby-1.9.2-p136@edge/gems/sqlite3-1.3.3 for inspection.

Results logged to /home/rajib/.rvm/gems/ruby-1.9.2-p136@edge/gems/sqlite3-1.3.3/ext/sqlite3/gem_make.out

WILL SOLVE THE PROBLEM =================================================

sudo apt-get install libsqlite3-dev

require ‘test_helper’ no such file to load

ruby 1.9.2 removed “.”, the current directory, from the load path. I have to do this to get it to work:

require ‘test_helper’

and call it like:

ruby -I. unit/person_test.rb

memcashed OSX

sudo port install memcached

sudo gem install memcache-client

/opt/local/bin/memcached -d -m 64 -u www -l <your ip> -p 11211