DMD Flags when Debugging

[Nordlöw via Digitalmars-d-debugger]

What is the preferred set of flags I should use when compiling 
with DMD in order to make GDB debugging experience as pleasable 
as possible?

Ian told me at DConf 2016 that the `-gc` flag shouldn't be used.

What about `-gs` and `-gx`.

Are these preferred?