Rails 3 - tidak dapat menginstal pg gem
Ketika saya mencoba menjalankan bundle (bundle install), saya selalu mendapatkannya 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...