[dpdk-dev] APP outside the development kit issues

Hi,
I'm trying to create new examples for DPDK, more precisely for
bbdev but I'm facing different issues.
First, following this link (58. Building Your Own Application — Data Plane
Development Kit 21.11.0-rc0 documentation (dpdk.org)
<https://doc.dpdk.org/guides/prog_guide/build_app.html>), I found the
example for bbdev not working
with the following error message: "EAL: Error - exiting with code: 1
  Cause: cannot use port with ID 0!"

After digging a little bit, it seems that --vdev option is not creating the
device so I tried
to create it as proposed here (16. Wireless Baseband Device Library — Data
Plane Development Kit 21.11.0-rc0 documentation (dpdk.org)
<https://doc.dpdk.org/guides/prog_guide/bbdev.html>) but even if I include
"rte_bus_vdev.h" which
I think is where all the creation and initialization functions are defined,
I'm getting
an "undefined reference to rte_vdev_init"

Is there any flow diagram or something similar to understand how DPDK is
configuring the
devices? which example should I use as a reference to create my own
"outside of the kit"
examples?

Thanks in advance,
Ginés.