Building static libs with -o-

[Jeremy DeHaan via digitalmars-d-ldc]

I started playing around with ldc v 0.15.1 on Linux, and when 
building static libraries I noticed that it still produced object 
files. I don't need object files for what I am doing, so I tried 
to use the -o- switch and just get the static libraries. 
Unfortunately, this causes no static library files to be produced 
either. Is this supposed to be the case or did I do something 
wrong?