Need to install The PG (Postgres GEM) via Bundler?

When attempting to upgrade a copy of Gitlab that I installed from source, I ran into an issue. Gitlab is a Ruby On Rails application that uses Bundler to handle all of it’s dependencies. When it attempted to bring in the Postgres SQL gem dependency, this had an issue with the sources that were available on the local system.

That required an install of Postgres-devel. On top of that it took some time to get bundler to recognize that the location of the libs and headers that it needed were located under/usr/pgsql-9.3/*.

To solve this, I found an answer on Stackoverflow.

bundle config build.pg --with-pg-config=/usr/pgsql-9.3/bin/pg_config

This is the equivalent to setting configuration arguments on your configure script in bash based application compiles/installs. After setting the configuration parameter, your bundler install should succeed without an issue about missing headers or pg_config binaries.