What is the equivalent of -version=Flag for conditional compilation in the ldc2 compiler?

[Johan]

On Friday, 5 June 2020 at 22:36:23 UTC, data pulverizer wrote:
> Hi,
>
> I was switching from dmd to ldc2 and would like to know the 
> equivalent command line for conditional compilation 
> -version=Flag I was using in dmd. I checked the ldc2 --help but 
> didn't see anything relevant. Version there refers to compiler 
> version or some other unrelated things.

You can also use `ldmd2` as driver for ldc2 with dmd commandline 
syntax.

-Johan