Rails: Błąd instalacji pg gem [duplikat]

Możliwy duplikat:
Postgres - ostatnia wersja 0.14.0 klejnotu „pg” daje błąd

Jestem nowy w szynach. Chcę używać PostgreSQL, ponieważ Heroku też go używa, ale mam zły czas instalującpg klejnot. Najwyraźniej brakuje niektórych plików i nie można utworzyć pliku Makefile?

Mój plik klejnotów wygląda tak:

source 'https://rubygems.org'

gem 'rails', '3.2.6'
gem 'faker', '1.0.1'
gem 'pg', '0.12.2'
gem 'json'

group :development, :test do
  gem 'rspec-rails', '2.10.0'
end

group :assets do
  gem 'sass-rails',   '~> 3.2.3'
  gem 'coffee-rails', '~> 3.2.1'
  gem 'uglifier', '>= 1.0.3'
end

gem 'jquery-rails', '2.0.0'

group :test do
  gem 'capybara', '1.1.2'
  gem 'factory_girl_rails', '1.4.0'
end

A kiedy ucieknębundle install Podczas instalowania klejnotu pg pojawia się następujący błąd:

    Installing pg (0.14.0) with native extensions 
Gem::Installer::ExtensionBuildError: ERROR: Failed to build gem native extension.

/System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/bin/ruby extconf.rb 
checking for pg_config... yes
Using config values from /usr/local/bin/pg_config
checking for libpq-fe.h... yes
checking for libpq/libpq-fs.h... yes
checking for pg_config_manual.h... yes
checking for PQconnectdb() in -lpq... no
checking for PQconnectdb() in -llibpq... no
checking for PQconnectdb() in -lms/libpq... no
Can't find the PostgreSQL client library (libpq)
*** 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=/System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/bin/ruby
    --with-pg
    --without-pg
    --with-pg-dir
    --without-pg-dir
    --with-pg-include
    --without-pg-include=${pg-dir}/include
    --with-pg-lib
    --without-pg-lib=${pg-dir}/lib
    --with-pg-config
    --without-pg-config
    --with-pg_config
    --without-pg_config
    --with-pqlib
    --without-pqlib
    --with-libpqlib
    --without-libpqlib
    --with-ms/libpqlib
    --without-ms/libpqlib


Gem files will remain installed in /Users/KennyGWang/.bundler/tmp/18833/gems/pg-0.14.0 for inspection.
Results logged to /Users/KennyGWang/.bundler/tmp/18833/gems/pg-0.14.0/ext/gem_make.out
An error occured while installing pg (0.14.0), and Bundler cannot continue.
Make sure that `gem install pg -v '0.14.0'` succeeds before bundling.

Zainstalowałem postgresql używając homebrew,brew install postgresql, więcwhich psql daje mi/usr/local/bin/psql

Każda pomoc jest doceniana!

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