How to use bd file.

[Readon]

I have an existed bd file, and i put it into src directory, which are expected to be included in the project.
However it is not in the project after running the generated tcl.

I also tried to add the bd file into the newly created project, and use wproj command to update the tcl.
It still did nothing.

How can i let the bd file be generated automatically through the tcl script?