Building programs with libpq

Hi,
https://www.postgresql.org/docs/9.5/static/libpq-build.html tells I
need pkg-config to supply to the Makefile to be able to build the
program.

However it is availble on *nix only and not on Mac.

Is there Mac equivalent?

I'm doing development on Xcode, so maybe pg-config is enough?

Thank you.