[llvm-dev] PSA: debuginfo-tests workflow changing slightly

[Zachary Turner via llvm-dev]

Greetings,

If you dont' care about running debuginfo-tests, and don't maintain a bot
that runs debuginfo-tests, you can stop reading.

I've uploaded a patch [https://reviews.llvm.org/D39605] that changes the
way you run debuginfo-tests.

Prior to this patch, the way to run them is to clone an external git
repository into clang/test and then debuginfo-tests will happen
transparently when you run "ninja check-clang".

After this patch, there will be two workflows depending on if you use
multi-repo or mono-repo.

multi-repo: You will need to clone debuginfo-tests into llvm/projects, then
run "ninja check-debuginfo"

mono-repo: pass -DLLVM_ENABLE_PROJECTS="debuginfo-tests", then run "ninja
check-debuginfo"

The motivation for this change is that planned additions to debuginfo-tests
require us to be able to make use of lld, and as a result the tests need to
live somewhere that can access both clang and lld, not just clang.
Furthermore, giving them their own target "check-debuginfo" as opposed to
being transparently added to check-clang makes more sense from a usability
perspective.  Finally, this new approach is mono-repo friendly whereas the
previous one was not.

I'm hoping this won't be too disturbing of a change, but please leave
comments and issues on this thread or on the code rview.

Thanks!
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