[PATCH] D155431: [CMake] Clean up old code for handling MSVC runtime setting the old way

[Martin Storsjö via Phabricator via llvm-commits]

mstorsjo added inline comments.


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Comment at: llvm/cmake/modules/ChooseMSVCCRT.cmake:12-13
+# setting different choices for different build configurations (for
+# multi-config generators), but translating multiple differing choices to
+# CMAKE_MSVC_RUNTIME_LIBRARY isn't supported.
 
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smeenai wrote:
> Does using generator expressions for this not work, as suggested in https://cmake.org/cmake/help/latest/variable/CMAKE_MSVC_RUNTIME_LIBRARY.html?
I haven't tested myself, but I would believe them to work.

What I'm trying to say here, is that I'm not trying to make a generic function that reads a number of `LLVM_USE_CRT_*` options and generates one single generator expression for `CMAKE_MSVC_RUNTIME_LIBRARY` that would express exactly the chosen combination.

I.e. for trivial cases with `LLVM_USE_CRT_*` this should help you along and you'd get a kind warning asking you to move onwards to `CMAKE_MSVC_RUNTIME_LIBRARY` at some point. If you have a nontrivial case, you'll to express it with a generator expression directly in `CMAKE_MSVC_RUNTIME_LIBRARY` right away.

I.e. "isn't supported" refers to the transitionary implementation here, not about what `CMAKE_MSVC_RUNTIME_LIBRARY` can do.

I guess I could reword it to be clearer.


Repository:
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  https://reviews.llvm.org/D155431/new/

https://reviews.llvm.org/D155431