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Rails 3 - không thể cài đặt pg gem
Khi tôi cố gắng chạy gói (cài đặt gói), tôi luôn nhận được 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 pg_config... trying anyway. If building fails, please try again with --with-pg-config=/path/to/pg_config checking for libpq-fe.h... no Can't …