gdc 12.1: undefined references when linking separately compiled files

[Tejas]

On Saturday, 28 May 2022 at 13:12:46 UTC, kdevel wrote:
> I am trying to build a project with GDC. It successfully 
> compiles with dmd and ldmd2. When I use gdc in one go the 
> binary is successfully build:
>
> [...]

Is seperate compilation working successfully for dmd and ldc?

The only bug I know of regarding seperate compilation is 
https://issues.dlang.org/show_bug.cgi?id=20641