In v2006, the .bdsproj file can only be built by the Delphi IDE, which displays a GUI when run. The older .dpr/.dpk file formats can be built with dcc32, which is a console app.
http://www.kinook.com/VisBuildPro/Ma...ctgrouptab.htm
http://www.kinook.com/VisBuildPro/Ma...optionstab.htm