commit 69a9760beefae554b444251ebc8f0f4c44a73207
author Marijn Kruisselbrink <mek@chromium.org> Wed Feb 16 18:54:18 2022
committer Copybara-Service <copybara-worker@google.com> Wed Feb 16 19:19:28 2022
tree 2ede309130ec252cbc0370bac9a10290fa4b2d52
parent 9575ca26524c7c7de00e89d061f4df51c346ab69

Revert "Build libc++ and libc++abi with -std=c++20"

This reverts commit aea3a572a01844fdf4b4137d2b0c1fad90f70aab.

Reason for revert: Broke compile on linux-gcc-rel bot
https://ci.chromium.org/ui/p/chromium/builders/ci/linux-gcc-rel/253851/overview

g++: error: unrecognized command line option ‘-std=c++20’; did you mean ‘-std=c++03’?

Original change's description:
> Build libc++ and libc++abi with -std=c++20
>
> This changed upstream a while ago
> (https://github.com/llvm/llvm-project/commit/3b625060fc), and as of
> this commit it's required to build libcxxabi:
>
> https://chromium.googlesource.com/external/github.com/llvm/llvm-project/libcxxabi.git/+/3359ae8b6165e0512446c0f6b3fe50da4e30c8cb
>
> Generally, we require the same -std= flag across all of chromium.
> Given that this is a low-level external library, make an exception
> for just this library. (It also used c++17 before the rest, for the
> same reasons.) No other target should do this.
>
> Bug: 1298070
> Change-Id: I6767464dfea1ae3b61224563da96be5dd08bd702
> Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/3469195
> Commit-Queue: Nico Weber <thakis@chromium.org>
> Auto-Submit: Nico Weber <thakis@chromium.org>
> Reviewed-by: Hans Wennborg <hans@chromium.org>
> Commit-Queue: Hans Wennborg <hans@chromium.org>
> Cr-Commit-Position: refs/heads/main@{#971961}

Bug: 1298070
Change-Id: Ia1d1c7e7923af63ea409d128aa842c1140fc8a58
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/3468986
Owners-Override: Marijn Kruisselbrink <mek@chromium.org>
Auto-Submit: Marijn Kruisselbrink <mek@chromium.org>
Commit-Queue: Rubber Stamper <rubber-stamper@appspot.gserviceaccount.com>
Bot-Commit: Rubber Stamper <rubber-stamper@appspot.gserviceaccount.com>
Cr-Commit-Position: refs/heads/main@{#971963}
NOKEYCHECK=True
GitOrigin-RevId: dca2c86a4bbb1664d65a810b856677c05f3e3ff1