An error occurred while installing pg (0.17.1), and Bundler cannot continue

Question

I just installed Rails 4.0.2 and when creating a new app, in the bundle 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 do I fix this?

You may want to add an osx tag. The solution appears that it may be related specifically to your OS. — Vince, Dec 24 '13 at 02:58
You might want to visit . http://stackoverflow.com/questions/3116015/how-to-install-gem-pg-on-ubuntu . Hope one of those solutions help — Yana Agun Siswanto, Dec 24 '13 at 03:37

score 188 · Answer 1 · edited May 23 '17 at 12:26

188

Some kind of error resported here Installing PG gem on OS X - failure to build native extension

To install dependencies on Ubuntu try this:

sudo apt-get install libpq-dev

and this

gem install pg

edited May 23 '17 at 12:26

Community

1
1

answered Dec 24 '13 at 02:42

Talgat Medetbekov

3,741
1
19
26

6

Im on a mac, what should I do? – Deekor Dec 24 '13 at 02:42
1

Following the tutorial on railstutorial.org. This is what you need to do for Mint. Thanks. – Christopher Schneider Jan 28 '15 at 04:27
railstutorial.org -- paid tutorial; any other ideas? – Terra Ashley Feb 06 '16 at 09:05
@Deekor If you're using Homebrew you can run `brew install postgresql`, then the `pg` gem should properly install. See [these docs](https://wiki.postgresql.org/wiki/Homebrew). – theblang Dec 31 '20 at 19:59

score 146 · Accepted Answer · edited May 04 '17 at 08:29

146

I'm on a Mac running Mavericks. My solution was to install Postgres.

And then in terminal install 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 edited to use the latest symlink that is currently included in shipping versions of the Postgres app.

Previous versions suggested:

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

edited May 04 '17 at 08:29

LunaCodeGirl

5,432
6
30
36

answered Mar 19 '14 at 01:43

Bob O'Brien

1,583
1
11
6

Yup mine was in a different location as well. Thanks for the answer. – Deekor Apr 11 '14 at 00:07
Correct Bob, the version of postgresapp in which this worked for me, was Version 9.2.2.0, so they must have changed this location on the 9.3 release. – Robertibiris Apr 22 '14 at 13:20
1

And now, as of 1/22/15 we're looking at the 9.4 release, it's good to see they're keeping it updated -- "gem install pg -- --with-pg-config=/Applications/Postgres.app/Contents/Versions/9.4/bin/pg_config" – corprew Jan 22 '15 at 22:58
3

I was in a rush and missed the part of this answer that says "install using home-brew". This answer worked for me after I did `brew update; brew install postgres` – Dennis Feb 26 '15 at 16:28
6

In your solution, please add the version, other the latest PG gem will install: `gem install pg -v '0.17.1' -- --with-pg-config=/Applications/Postgres.app/Contents/Versions/9.3/bin/pg_config` – user1322092 Mar 07 '15 at 15:59
In my case (Linux Mint 17.1), install libpq-dev via apt-get made it. – saiyancoder Mar 11 '15 at 17:18
This worked for me while trying to `bundle install` gems included in the Ruby Getting Started Heroku walkthrough: https://devcenter.heroku.com/articles/getting-started-with-ruby#run-the-app-locally – ctlockey Apr 10 '18 at 17:57

knice · Answer 3 · 2014-05-07T21:41:59.933

23

app root:

brew update
brew install postgres
gem install pg -- --with-pg-config=/usr/local/Cellar/postgresql/9.3.4/bin/pg_config
bundle install
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 needed.

edited May 07 '14 at 21:41

answered May 07 '14 at 21:12

knice

391
2
8

score 11 · Answer 4 · edited Jun 20 '20 at 09:12

11

Previously working answer with older version

I installed under mac OSX Mavericks, having the postgres app (Version 9.2.2.0 ) from www.postgresapp.com installed. The underlying problem was simpy that the since postgres was installed via the app, the configuration file resides on a location which is not the default one when installing it without postgressapp. so we need to tell gem where to find this file by:

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

Hope it helps

edited Jun 20 '20 at 09:12

Community

1
1

answered Feb 05 '14 at 10:34

Robertibiris

844
8
15

1

This was my solution (OSX) – raulriera Feb 18 '14 at 19:46
If this isnt working for anyone, for 9.3 the config file has moved - see the accepted answer. – Deekor Apr 11 '14 at 00:10

score 5 · Answer 5 · answered Dec 24 '13 at 02:57

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 the PostgreSQL.app Documentation

answered Dec 24 '13 at 02:57

Vince

3,962
3
33
58

2

Since the official app recently changed names to "Postgres93.app", the command should be: `env ARCHFLAGS="-arch x86_64" gem install pg -- --with-pg-config=/Applications/Postgres93.app/Contents/MacOS/bin/pg_config` – Blackcoat Jan 19 '14 at 20:49
1

for me it worked with: `env ARCHFLAGS="-arch x86_64" gem install pg` – dnlcrl May 13 '14 at 23:02

score 4 · Answer 6 · answered Dec 24 '13 at 02:38

4

Looks like you do not have PostgreSQL installed. The pg gem requires some headers from PostgreSQL to compile native extension.

answered Dec 24 '13 at 02:38

tungd

14,467
5
41
45

How about your Ruby/Bundler setup? You're using Mac OS X or Linux? and if you're using Mac OS X, you installed PostgreSQL via `homebrew` or PostgreSQL.app? – tungd Dec 24 '13 at 02:44
Im on a mac. I installed via the app – Deekor Dec 24 '13 at 02:46
I have 0.17.0 installed. Any harm in using that with rails 4? – Deekor Dec 24 '13 at 02:46
Then try running `bundle config build.pg --with-pg-config=/Applications/Postgres.app/Contents/MacOS/bin/pg_config` and run `bundle` again. Adjust the config path if you install the app to `~/Application` rather than `/Application` – tungd Dec 24 '13 at 02:47

score 3 · Answer 7 · answered Apr 28 '15 at 16:28

3

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

answered Apr 28 '15 at 16:28

Mark Wang

342
3
11

score 3 · Answer 8 · answered Aug 14 '15 at 05:12

3

If you are using something other than Postgres in development and Postgres in production only, you can add the pg gem to your gemfile like so...

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

Then use bundle install --without production

answered Aug 14 '15 at 05:12

j8d

446
7
23

score 3 · Answer 9 · answered Oct 19 '17 at 05:47

3

For CentOS users:

sudo yum install postgresql-devel

and

gem install pg

answered Oct 19 '17 at 05:47

webster

3,902
6
37
59

score 1 · Answer 10 · answered Dec 12 '19 at 21:32

I have just set up a new Macbook Pro which was prebuilt with Catalina.

What worked for me:

Install the Postgres from here: https://postgresapp.com/
Add export PATH="/Applications/Postgres.app/Contents/Versions/latest/bin:$PATH"to your .zshenv, since Z shell is now the default terminal.

score 1 · Answer 11 · answered Jul 25 '22 at 15:25

1

On mac this command worked for me.

gem install pg -v '0.18.4' -- --with-cflags="-Wno-error=implicit-function-declaration"

answered Jul 25 '22 at 15:25

vikas95prasad

1,234
1
12
37

score 0 · Answer 12 · answered Nov 02 '14 at 01:26

0

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 this bundle install works great!

Hope it helps

answered Nov 02 '14 at 01:26

pochocosta

13
3

score 0 · Answer 13 · answered Nov 18 '14 at 15:36

The way I managed to get past that error was:

cd to app folder and then set the ruby version locally. I'm using ruby 2.1.2.

rbenv local 2.1.2

instead of just running bundle install, install the gems in vendor/bundle

bundle install --path vendor/bundle

This did it for me.

score 0 · Answer 14 · answered Feb 29 '16 at 00:18

0

I needed to use sudo

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

answered Feb 29 '16 at 00:18

gypsyDev

1,232
1
14
22

score 0 · Answer 15 · answered Apr 01 '19 at 22:40

0

I was having a problem with Amazon and couldn't use apt-get. For my worked:

    sudo yum install postgresql-devel

then:

    bundle install

and try again:

    rails serve

answered Apr 01 '19 at 22:40

Maurici Abad

1,012
9
20

score 0 · Answer 16 · answered May 14 '19 at 16:36

0

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

answered May 14 '19 at 16:36

zykadelic

1,083
11
19

score -2 · Answer 17 · answered Jan 27 '18 at 23:13

-2

It works for me

rvm list gemsets
rvm use ruby-2.4.1
bundle

]2

answered Jan 27 '18 at 23:13

DevMasterAryan

61
5

You're not installing the `pg` gem here – zykadelic May 14 '19 at 16:35

An error occurred while installing pg (0.17.1), and Bundler cannot continue

17 Answers17

Previously working answer with older version

Linked

Related