Unable to install PG gem on Fedora 17
For Fedora 20+, following package is needed:
sudo yum install postgresql-devel
for fedora 30:
$sudo dnf install libpq-develthen:
$gem install pgBuilding native extensions. This could take a while...Successfully installed pg-1.1.4Parsing documentation for pg-1.1.4Installing ri documentation for pg-1.1.4Done installing documentation for pg after 1 seconds1 gem installed