Don't issue a deprecated diagnostic when a deprecated macro is used in a deprecated definition #81359
Description
If a declaration itself is deprecated and uses deprecated functionality, the deprecation warning of the stuff it uses should be suppressed: https://godbolt.org/z/b839bqGj7. This looks like a Clang bug to me. Could you file one?
Originally posted by @philnik777 in #80542 (comment)
Oofda. I want to call this a bug, but it's going to be exceptionally hard to work around because of the difference in phases of translation. We issue the deprecated macro warning when the macro is expanded, which is long before we have any idea of how the value is being used. So it may be worth filing a QoI enhancement request over it, but I don't know that we have a way to improve it just yet.