我需要在ROR应用程序的生产环境中安装postgresql，以便在heroku上使用。但是，在尝试安装'pg'宝石时会触发以下错误。由于我是新手，所以不知道该怎么办。
我正在使用ruby 1.9.3p547（2014-05-14修订45962）[i686-linux]和Rails 3.2.19以及Ubuntu 12.04。
GemFile：
源 'https://rubygems.org'
gem 'rails'，'3.2.19'
当我运行bundle update或bundle install时，出现了问题。
我正在使用ruby 1.9.3p547（2014-05-14修订45962）[i686-linux]和Rails 3.2.19以及Ubuntu 12.04。
GemFile：
源 'https://rubygems.org'
gem 'rails'，'3.2.19'
# Bundle edge Rails instead:
# gem 'rails', :git => 'git://github.com/rails/rails.git'
gem 'mysql2'
gem 'hirb'
# Gems used only for assets and not required
# in production environments by default.
group :assets do
gem 'sass-rails', '~> 3.2.3'
gem 'coffee-rails', '~> 3.2.1'
# See https://github.com/sstephenson/execjs#readme for more supported runtimes
# gem 'therubyracer', :platforms => :ruby
gem 'uglifier', '>= 1.0.3'
end
gem 'jquery-rails'
group :production do
gem 'pg'
end
# To use ActiveModel has_secure_password
# gem 'bcrypt-ruby', '~> 3.0.0'
# To use Jbuilder templates for JSON
# gem 'jbuilder'
# Use unicorn as the app server
# gem 'unicorn'
# Deploy with Capistrano
# gem 'capistrano'
# To use debugger
# gem 'debugger'
当我运行bundle update或bundle install时，出现了问题。
Gem::Ext::BuildError: ERROR: Failed to build gem native extension.
/home/fernando/.rvm/rubies/ruby-1.9.3-p547/bin/ruby -r ./siteconf20141203-14261-3uu564.rb 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 find the 'libpq-fe.h header
*** 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/fernando/.rvm/rubies/ruby-1.9.3-p547/bin/ruby
--with-pg
--without-pg
--with-pg-config
--without-pg-config
--with-pg_config
--without-pg_config
--with-pg-dir
--without-pg-dir
--with-pg-include
--without-pg-include=${pg-dir}/include
--with-pg-lib
--without-pg-lib=${pg-dir}/lib
extconf failed, exit code 1
Gem files will remain installed in /home/fernando/.rvm/gems/ruby-1.9.3-p547@ticket_master/gems/pg-0.17.1 for inspection.
Results logged to /home/fernando/.rvm/gems/ruby-1.9.3-p547@ticket_master/extensions/x86-linux/1.9.1/pg-0.17.1/gem_make.out
An error occurred while installing pg (0.17.1), and Bundler cannot continue.
Make sure that `gem install pg -v '0.17.1'` succeeds before bundling.