vhdl-compose-configuration-create-file

vhdl-compose-configuration-create-file is a variable defined in `vhdl-mode.el'.
Its value is

nil

Documentation:
Specifies whether a new file should be created for the configuration.
If non-nil, a new file is created for the configuration.
The file name is obtained from variable `vhdl-configuration-file-name'.

You can customize this variable.