thakis added a comment.

In D91913#2520503 <https://reviews.llvm.org/D91913#2520503>, @hvdijk wrote:

> In D91913#2520432 <https://reviews.llvm.org/D91913#2520432>, @zequanwu wrote:
>
>> In D91913#2520414 <https://reviews.llvm.org/D91913#2520414>, @hvdijk wrote:
>>
>>> In D91913#2520399 <https://reviews.llvm.org/D91913#2520399>, @zequanwu 
>>> wrote:
>>>
>>>> This change also breaks many chrome ToT bots(not just windows bot), 
>>>> example build: 
>>>> https://ci.chromium.org/ui/p/chrome/builders/ci/ToTLinuxOfficial/10524/steps?succeeded=true&debug=false
>>>
>>> That requires an account to see.
>>
>> This should be accessible without an account: 
>> https://logs.chromium.org/logs/chromium/buildbucket/cr-buildbucket.appspot.com/8857139118288337920/+/steps/compile/0/stdout
>
> Indeed. However, here, this seems to be a user problem. Chrome `-std=c++*` 
> when building with clang, but `-std=gnu++*` when building with GCC for 
> exactly this reason, see build/config/compiler/BUILD.gn. Chrome should use 
> `-std=gnu++*` with clang too.

We (and every other project out there) needs some incremental rollout plan for 
this. We don't want to allow _more_ GNU features. Please put this behind a `-f` 
toggle, or revert this for a bit implementing this takes some time.


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D91913/new/

https://reviews.llvm.org/D91913

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