Question

我已经安装了pg gem，但是......

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，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

如何解决此问题？提前谢谢。

修改答：诀窍是在正确路径下将pg gem安装到pg_config，而不是在未完全安装之前。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

您需要在

之前安装libpq-dev

Answer 2

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。在找到pg_config exec文件后，我运行了gem install pg -- --with-pg-config=/opt/local/lib/postgresql84/bin/pg_config。我只需要找到我的pg_config文件并在该路径下运行gem install。

Answer 3

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

Answer 4

对于Windows和0.13.0 gem的版本pg，您应该可以使用以下内容安装它：

subst X: "C:\Program Files\PostgreSQL\9.0"
gem install pg -- --with-pg=X:
subst X: /D

然后您可以成功运行bundle install并在输出中看到以下行：

Using pg (0.13.0)

而不是错误。

[这与this对相关问题Can't install pg gem on Windows的回答相同。]

Answer 5

在ubuntu 18.04上，运行以下命令

sudo apt update
sudo apt install libpq-dev

Answer 6

对于 iOS：

brew install libpq

参考：https://formulae.brew.sh/formula/libpq

为什么没有捆绑安装允许pg gem完全安装？

6 个答案: