[clang] [llvm] [clang] Clang multi-match behavior of WarningSuppressionMappings (PR #162237)

[Vitaly Buka via llvm-commits]

vitalybuka wrote:

> I don't know how many use this, and if we need some gentler way to change this behavior to avoid breaking people.

This file is relatively new.
We did such change for sanitizer, no complains so far.

And it's very nuanced case ON/OFF with "emit". I see how it can be theoretically useful and good for completeness, but likely only suppression case is used to temporarily suppression.

Also I am not sure ignore/suppression list does not deserve significant compatibility work.
We can do that, but seems unnecessary.

https://github.com/llvm/llvm-project/pull/162237