no libpq.pc for Centos 6 or Centos 7

Hello List,

I can't seem to find  a pkgconfig file for postgresql on centos 6 or centos 7.

Centos packages installed
$ rpm -qa|grep postgresql
postgresql-server-9.2.24-1.el7_5.x86_64
postgresql-9.2.24-1.el7_5.x86_64
postgresql-devel-9.2.24-1.el7_5.x86_64
postgresql-libs-9.2.24-1.el7_5.x86_64

Centos 6 packages installed
postgresql-server-8.4.20-8.el6_9.x86_64
postgresql-devel-8.4.20-8.el6_9.x86_64
postgresql-8.4.20-8.el6_9.x86_64
postgresql-libs-8.4.20-8.el6_9.x86_64
postgresql-contrib-8.4.20-8.el6_9.x86_64


Any ideas?

Thanks,
Steve