[PATCH] D69822: [clang] Add new -fdebug-default-version flag.

[David Blaikie via Phabricator via cfe-commits]

dblaikie added a comment.

In D69822#1733226 <https://reviews.llvm.org/D69822#1733226>, @probinson wrote:

> > Want to decouple setting the DWARF version from enabling/disabling generation of debug info.
>
> Um, why?


If you've got a big build system with various users opting in/out of DWARF and you want to migrate to DWARFv5, say, but you can't add "-gdwarf-5" to your build system, because that'd turn on debug info in cases that don't need it - but it's easier to change the default than to modify all cases that enable dwarf across the codebase.

Open to discussion about whether this is a good/bad idea - but it'd be useful for Google at least & seemed low-cost enough to go this route.


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