A simple dub build --build=release --build-mode=allAtOnce should just work.
The only supported compiler is ldc >= 1.17.0.
Dub doesn't know how to handle wasm files so it will put the wrong file extension on them. See dlang/dub#1749
On windows you will need to add the --combined flag to dub.
The new separate compilation feature that dub got for ldc causes an unrecognized flag (--no-as-needed) to be propagated. The short term fix is adding the --build-mode=allAtOnce to the dub invocation.
Works as intended.
ldc 1.16.0 requires the "allowWarnings" buildRequirements in your project's dub.json/sdl file.
ldc 1.16.0 produces some bloat due to the visibility not being set on compiler generated code. There is an issue open ldc #3122.
You can get the same behavior as in ldc 1.15.0 by removing the --export-dynamic in the ldc2.conf file in your ldc installation. Alternatively you can put a custom ldc2.conf in your projects root folder (from where you execute dub).