Error installing pg (0.17.1) and Bundler cannot continue

Question

I just installed Rails 4.0.2 , and when I create a new application at the package stage, I get:

 Installing pg (0.17.1) Gem::Installer::ExtensionBuildError: ERROR: Failed to build gem native extension. /Users/Dee/.rvm/rubies/ruby-2.0.0-p247/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 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. 

How to fix it?

Answer 1

I am on a Mac with Mavericks. My solution was to install Postgres .

And then in a terminal installation using homebrew with the configuration:

 gem install pg -- --with-pg-config=/Applications/Postgres.app/Contents/Versions/latest/bin/pg_config 

Note. This answer has been modified to use the latest symlink, which is currently included in the delivery version of the Postgres application.

Previous Versions:

 gem install pg -- --with-pg-config=/Applications/Postgres.app/Contents/Versions/9.4/bin/pg_config 

Answer 2

Some mistake shifted here Installing the PG pearl on OS X - the inability to create your own extension

To install dependencies on Ubuntu, try the following:

 sudo apt-get install libpq-dev 

and this one

 gem install pg 

Answer 3

root applications:

• brew update
• brew install postgres
• gem install pg - --with-pg-config = / usr / local / Cellar / postgresql / 9.3.4 / bin / pg_config
• install package
• ln -sfv / usr / local / opt / postgresql / *. plist ~ / Library / LaunchAgents
• launchctl load ~ / Library / LaunchAgents / homebrew.mxcl.postgresql.plist
• createuser -s -r postgres
• rake db: create: all
• rake db: migrate
• rails s

NOTE. Replace the version number in step 3 if necessary.

Answer 4

Previously working answer with the old version

I installed Mavericks under Mac OSX by installing the postgres application (Version 9.2.2.0) from www.postgresapp.com . The main problem was that since postgres was installed through the application, the configuration file is in a location that is not the default directory when it is installed without postgressapp. so we need to tell gem where to find this file:

 gem install pg -- --with-pg-config=/Applications/Postgres.app/Contents/MacOS/bin/pg_config 

Hope help

Answer 5

If gem install pg fails, try the following command:

 env ARCHFLAGS="-arch x86_64" gem install pg -- --with-pg-config=/Applications/Postgres.app/Contents/MacOS/bin/pg_config 

... from PostgreSQL.app Documentation

Answer 6

It looks like you do not have PostgreSQL. pg graphics require some PostgreSQL headers to build their own extension.

Answer 7

I had to combine everything and use

 sudo env ARCHFLAGS="-arch x86_64" gem install pg -- --with-pg-config=/Applications/Postgres.app/Contents/Versions/9.4/bin/pg_config 

Answer 8

If you use something other than Postgres in development and Postgres only in production, you can add pg gem to your gemfile, for example ...

 group :production do gem 'pg', '0.17.1' end 

Then use bundle install --without production

Answer 9

For CentOS users:

 sudo yum install postgresql-devel 

and

 gem install pg 

Answer 10

After installing Postgres, I had to run the following command

 env ARCHFLAGS="-arch x86_64" gem install pg -- --with-pg-config=/Applications/Postgres.app/Contents/Versions/9.3/bin/pg_config 

After installing this build works great!

Hope this helps

Answer 11

How I managed to get past this error:

• cd to the application folder, and then install the ruby ​​version locally. I am using ruby ​​2.1.2.

rbenv local 2.1.2

• instead of just installing the package, install the gems in the supplier / kit

bundle install --path vendor / bundle

It did it for me.

Answer 12

I needed to use sudo

 sudo gem install pg -- --with-pg-config=/Applications/Postgres.app/Contents/Versions/9.5/bin/pg_config 

Answer 13

I had problems with Amazon and I could not use apt-get. For my work:

  sudo yum install postgresql-devel 

then:

  bundle install 

and try again:

  rails serve 

Answer 14

If you installed via Homebrew; gem install pg -- --with-pg-config=/usr/local/bin/pg_config . Works with Ruby 2.4.6 and pg 0.20.0.

Answer 15

It works for me

 rvm list gemsets rvm use ruby-2.4.1 bundle 

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