pg gem '0.14.0' on Mountain Lion fails

Question

I just upgraded from OS X Lion to OS X Mountain Lion. My rails environment for the most part stayed in tact.

The only steps I had to do to get things back to a good

Answer 1

Fro those, who are using Kubuntu 13.04 and installed pg with one click tool, pg config is in other folder, so command:

gem install pg -- --with-pg-config=/opt/PostgreSQL/9.3/bin/pg_config

Answer 2

The issue is the location of pg_config. If you use the one-click installer, it is in /Library/PostgreSQL/9.2/bin/pg_config, so this will build your gem just fine:

env ARCHFLAGS="-arch x86_64" gem install pg -- --with-pg-config=/Library/PostgreSQL/9.2/bin/pg_config

Answer 3

Reinstalling ruby fixed a similar issue I was having after upgrading to Mountain Lion

rvm reinstall 1.9.3

Note: also run the following as it seems the default version resets

rvm --default 1.9.3

For reference I posted the error I was seeing below

gem install pg
Building native extensions.  This could take a while...
ERROR:  Error installing pg:
ERROR: Failed to build gem native extension.

/System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/bin/ruby extconf.rb --with pg=/usr/local/Cellar/postgresql/9.1.4/bin
checking for pg_config... yes
Using config values from /usr/local/bin/pg_config
checking for libpq-fe.h... no
Can't find the 'libpq-fe.h header
*** extconf.rb failed ***

Answer 4

I was able to get it to work by installing the Postgres.app from Heroku and removing my existing postgresql installation. You can download the app here:

http://postgresapp.com/

brew remove postgresql

bundle install

If you didn't use brew, here's a link to more uninstall docs from Postgres.app

http://postgresapp.com/documentation#toc_16

Answer 5

I had the exact same issue; same stack trace as you've posted.

MRI 1.9.3-p286 / OS X 10.8.2 / Postgres 9.0.4 with homebrew.

I solved it by simply doing:

$ brew update
$ brew upgrade postgresql
$ bundle

Hope it works for someone else.

Answer 6

Mac comes with an outdated prebuilt PostgreSQL client installation and pg_config file that comes with it conflicts with any new PostgreSQL server & client installations.

Installing ruby gem with a fully qualified file name of pg_config overrides default known location of pg_config and installation succeeds.

Current location of pg_config by one click installer by EnterpriseDB: /Library/PostgreSQL/bin/pg_config

This command finally worked for me.

CrashMX2$ gem install pg -- --with-pg-config=/Library/PostgreSQL/bin/pg_config