These files are a list of modules to load.
They can be of 2 types, global or by module.
Global, they have the name "bgdc.imp" and or "bgdc.import", and they should be in the compiler's directory.
Local, they are by project, the name is "<the prg's name>.imp" and or "<the prg's name>.import", and they should be in the .prg's directory.
The names of the modules should specify without extension, for example, for "mod_cd.dll" or "mod_cd.so", only "mod_cd" is necessary to put. (Without ")
One module by line should be specified.
This feature is optional, you can use the classic "import" keyword in your prg.
This file only is useful in compiler's time.