Mordante added a comment.

In D126907#3737641 <https://reviews.llvm.org/D126907#3737641>, @erichkeane 
wrote:

> In D126907#3737375 <https://reviews.llvm.org/D126907#3737375>, @Mordante 
> wrote:
>
>> This change breaks libc++'s modular build see build 
>> https://buildkite.com/llvm-project/libcxx-ci/builds/12991
>> Reverting this commit on top of yesterday's build (before your revert) fixes 
>> the issue.
>>
>> libc++'s modular build uses Clang's pre-C++20 modules.
>>
>> It can be reproduced building libc++ and running the following lit invocation
>> `${LIT} -Denable_modules=True 
>> libcxx/test/libcxx/ranges/range.adaptors/range.all/all.nodiscard.verify.cpp`
>>
>> If you need assistance testing a new version of this patch on libc++ please 
>> let me know.
>
> Is this not part of check-runtimes or check-cxx?  I ran both of those 
> INCLUDING a modules-builds-all...

It should be tested in `check-cxx` when you use the cmake option 
`-DLIBCXX_TEST_PARAMS="enable_modules=True"` and you need to configure libc++ 
to use your just build clang to be used for the tests. (The command I posted 
just does a single test, which is faster during bisecting.)

I'm not sure what you mean with `modules-builds-all`.


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D126907/new/

https://reviews.llvm.org/D126907

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