[Bug debug/93751] -g1 does not behave per manual

[ebotcazou at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=93751

--- Comment #9 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
> Hence I think we both agree that space-conscious applications are the
> primary consumers of -g1. It is just that in our case, we are also faced
> with the extreme bloat of -g2 but we need -g1 to do what it is currently
> described in the manual - just the function descriptions are not sufficient
> for us.
> 
> So I propose to introduce a new option, e.g. `-gdwarf-external-variables`
> that will make GCC generate the DIEs for external variables. In other words:
> 
> * `-g1` will keep the current behavior
> * `-g1 -gdwarf-external-variables` will do what the manual currently
> describes, which is also what we need
> 
> Would that be acceptable?

Sure.  People might even be OK to retrofit -gdwarf-external-variables into -g1
if the size increase is limited and -gno-dwarf-external-variables is available.