[clang-cl] --precompile make -fmodule-output directory ignored

[Arthapz]

when using clang-cl, --precompile seems to force the pcm file to be generated in the directory when clang is invoked instead of respecting -fmodule-output

// test.mpp
export module Test;

> F:\llvm\bin\clang-cl -std:c++20 -x c++-module -fmodule-output=a\test.pcm test.mpp -c

> F:\llvm\bin\clang-cl -std:c++20 -x c++-module -fmodule-output=a\test.pcm test.mpp --precompile

[ChuanqiXu9]

Maybe this is relevent? #121046 (comment)

And BTW, I encourage build system guys to look at driver's code directly if they want. Since they understand driver interfaces and the code structure in driver is somewhat, independent from the rest of compiler and there were not much other area knowledge.

[Arthapz]

Maybe this is relevent? #121046 (comment)

it is totally relevement i can properly fix it in XMake (by adding /clang:-o /clang:)

And BTW, I encourage build system guys to look at driver's code directly if they want. Since they understand driver interfaces and the code structure in driver is somewhat, independent from the rest of compiler and there were not much other area knowledge.

next time i'll do that

[ChuanqiXu9]

Fine enough. Then I thought this issue can be closed.