Rails 3 - impossible d'installer pg gem
Lorsque j'essaye d'exécuter bundle (bundle install), je reçois tout le temps Installing pg (0.13.2) with native extensions Gem::Installer::ExtensionBuildError: ERROR: Failed to build gem native extension. /Users/ryan/.rvm/rubies/ruby-1.9.2-p290/bin/ruby extconf.rb checking for pg_config... no No...