ChuanqiXu added a comment.

@aprantl Thanks for the reverting. I never image `-fcxx-modules` would refer to 
Clang C++ modules. So the problem becomes more complicated.

In D120540#3551169 <https://reviews.llvm.org/D120540#3551169>, @iains wrote:

> I guess Chuanqi's TZ is in sleep mode at the moment, so the revert makes 
> sense.
>
> Please let's not use -fmodules-ts to mean anything - we want to phase it out 
> and make it a NOP (we are implementing the standardised modules; I do not see 
> anyone putting effort into finishing the ts implementation).
>
> my suggestion is to introduce `-fmodules={cxx20, clang, etc. etc}` where 
> `-fmodules` is mapped in the driver to `-fmodules=clang` ... and to introduce 
> an enumeration in the options that is visible in the FE so that we can be 
> explicit in checking **which** kind of modules we mean at each stage.
>
> unfortunately, right now I cannot volunteer to implement the suggestion ...

Now I feel your proposal looks better. Given the current complexity we saw,  I 
feel it might be better to disambiguate the meaning of modules in clang first 
and I filed an issue: https://github.com/llvm/llvm-project/issues/55891. So 
that we could avoid discussing the same problem again and again in different 
review pages.


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D120540/new/

https://reviews.llvm.org/D120540

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