为什么没有捆绑安装允许pg gem完全安装？

Question

我已经安装了如图所示的pg gem,但......

Building native extensions.  This could take a while...
    Successfully installed pg-0.11.0
    ERROR:  Could not find a valid gem '—' (>= 0) in any repository
    ERROR:  Could not find a valid gem '–with-pg-config=/usr/local/pg/bin/pg_config' (>= 0) in any repository
    1 gem installed
    Installing ri documentation for pg-0.11.0...
    Installing RDoc documentation for pg-0.11.0...

当我捆绑安装时会发生奇怪的事情并且它不会完全安装pg gem:

Fetching source index for http://rubygems.org/
Using rake (0.9.2) 
Using abstract (1.0.0) 
Using activesupport (3.0.10) 
Using builder (2.1.2) 
Using i18n (0.5.0) 
Using activemodel (3.0.10) 
Using erubis (2.6.6) 
Using rack (1.2.3) 
Using rack-mount (0.6.14) 
Using rack-test (0.5.7) 
Using tzinfo (0.3.29) 
Using actionpack (3.0.10) 
Using mime-types (1.16) 
Using polyglot (0.3.2) 
Using treetop (1.4.10) 
Using mail (2.2.19) 
Using actionmailer (3.0.10) 
Using arel (2.0.10) 
Using activerecord (3.0.10) 
Using activeresource (3.0.10) 
Using annotate (2.4.0) 
Using bundler (1.0.18) 
Using diff-lcs (1.1.2) 
Using factory_girl (1.3.3) 
Using rdoc (3.9.3) 
Using thor (0.14.6) 
Using railties (3.0.10) 
Using rails (3.0.10) 
Using factory_girl_rails (1.0) 
Using faker (0.3.1) 
Using gravatar_image_tag (1.0.0.pre2) 
Using nokogiri (1.5.0) 
Installing pg (0.11.0) with native extensions /Users/******/.rvm/rubies/ruby-1.9.2-p180/lib/ruby/site_ruby/1.9.1/rubygems/installer.rb:552:in `rescue in block in build_extensions': ERROR: Failed to build gem native extension. (Gem::Installer::ExtensionBuildError)

然后我得到的行告诉我,我可能缺少必要的库或标题:

   *** 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=/Users/TonyNg/.rvm/rubies/ruby-1.9.2-p180/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
extconf.rb:24:in ``': No such file or directory - /users/****/

这是我的宝石文件:

  source 'http://rubygems.org'

gem 'rails', '3.0.10'

# Bundle edge Rails instead:
# gem 'rails', :git => 'git://github.com/rails/rails.git'

gem 'pg'
gem 'gravatar_image_tag', '1.0.0.pre2'
gem 'will_paginate', '3.0.pre2'



group :development do
  gem 'rspec-rails', '2.6.1'
  gem 'annotate', '2.4.0'
  gem 'faker', '0.3.1'
end

group :test do
  gem 'rspec-rails', '2.6.1'
  gem 'webrat', '0.7.1'
  gem 'spork', '0.9.0.rc8'
  gem 'factory_girl_rails', '1.0'
end

# Use unicorn as the web server
# gem 'unicorn'

# Deploy with Capistrano
# gem 'capistrano'

# To use debugger (ruby-debug for Ruby 1.8.7+, ruby-debug19 for Ruby 1.9.2+)
# gem 'ruby-debug'
# gem 'ruby-debug19', :require => 'ruby-debug'

# Bundle the extra gems:
# gem 'bj'
# gem 'nokogiri'
# gem 'sqlite3-ruby', :require => 'sqlite3'
# gem 'aws-s3', :require => 'aws/s3'

# Bundle gems for the local environment. Make sure to
# put test-only gems in this group so their generators
# and rake tasks are available in development mode:
# group :development, :test do
#   gem 'webrat'
# end

我该如何解决这个问题？提前致谢.

编辑 答案:诀窍是将pg gem安装在pg_config 的正确路径下,而不是在完全安装之前.我运行了'gem install pg - --with-pg-config =/opt/local/lib/postgresql84/bin/pg_config'作为我在上次评论中记下的路径.我只需找到我的pg_config文件并在其下运行gem install.

Answer 1

您需要先安装libpq-dev

Answer 2

诀窍是在 pg_config 的正确路径下安装 pg gem，而在它没有完全安装之前。gem install pg -- --with-pg-config=/opt/local/lib/postgresql84/bin/pg_config我在找到 pg_config exec 文件后运行。我只需找到我的 pg_config 文件并在该路径下运行 gem install 即可。

Answer 3

在 ubuntu 18.04 中，需要运行 sudo apt install libpq-dev