[cfe-dev] DWARFv5 by default in clang?

[Stephen Hines via cfe-dev]

Heh, I actually just moved the Android platform build to DWARFv5 last week (
https://android-review.googlesource.com/c/platform/build/soong/+/1954424).
We had previously tried this but had to revert it due to some issues with
libabigail. I'll move upstream LLVM to default to DWARFv5 for Android more
generally soon. Thanks for reminding me to do so.

Thanks,
Steve

On Sun, Jan 23, 2022 at 8:52 PM David Blaikie <dblaikie at gmail.com> wrote:

> Well, made the switch to DWARFv5 by default
> in d3b26dea16108c427b19b5480c9edc76edf8f5b4 and included a change to keep
> DWARFv4 as the default for linux-androideabi (at least I think I made that
> change in the right place). If it needs to be more generic (apply to
> non-linux toolchains, but I don't think so?) or can be removed because
> Android's OK with DWARFv5 - should be simple to make that change.
>
> On Sun, Jan 23, 2022 at 8:08 PM David Blaikie <dblaikie at gmail.com> wrote:
>
>> Hey Stephen,
>>
>> I see you added a test to ensure Android uses DWARFv4 here:
>> https://reviews.llvm.org/D60238
>>
>> Is that still the case? I can figure out how to ensure that's the case as
>> we transition the default to DWARFv5 for platforms that haven't opted out.
>>
>> On Tue, Nov 30, 2021 at 9:28 AM Khem Raj <raj.khem at gmail.com> wrote:
>>
>>> On Tue, Nov 30, 2021 at 9:10 AM via cfe-dev <cfe-dev at lists.llvm.org>
>>> wrote:
>>> >
>>> > > Generic_GCC has many (indirect) derived classes
>>> > > (FreeBSD/OpenBSD/Solaris) which override the base
>>> > > GetDefaultDwarfVersion().
>>> > > The Generic_GCC change will affect
>>> > > Haiku/Hurd/Linux/NetBSD/PS4CPU/etc. I have CC'd these folks: if
>>> > > your platform is not ready for DWARF v5, you can override
>>> > > GetDefaultDwarfVersion() in your toolchain.
>>>
>>> We have been using v5 in yocto with clang13 onwards as well [1] and
>>> have not seen any blockers.
>>>
>>> [1]
>>> https://github.com/kraj/meta-clang/blob/master/recipes-devtools/clang/clang/0027-clang-Switch-defaults-to-dwarf-5-debug-info-on-Linux.patch
>>>
>>> >
>>> > PS4 updated to set v4 explicitly as of
>>> >
>>> https://github.com/llvm/llvm-project/commit/b8e03be88dc87303f7401ea7b9906947ac67a6db
>>> > --paulr
>>> > _______________________________________________
>>> > cfe-dev mailing list
>>> > cfe-dev at lists.llvm.org
>>> > https://lists.llvm.org/cgi-bin/mailman/listinfo/cfe-dev
>>>
>>
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