ChuanqiXu9 wrote: > > clang++ -std=c++20 foo.cpp -c -fmodule-file=X=some/dir/X.pcm > > Hm, according to https://clang.llvm.org/docs/StandardCPlusPlusModules.html > this can already be achieved with the `-fmodule-output` option (and which I > was about to try in `build2`). Is there a reason a different option is used > for what seems to be the same functionality. Or am I missing something here? > > > This is the main point of the patch - to do this efficiently. > > Again, just want to clarify: as I understand it, this patch solves the > scaling issue Ben reported (#60996) but without the thin/fat BMI > complications, correct?
The difference is about the efficiency and the interfaces doesn't change a lot. Previously, in the one phase compilation mode, what clang did actually is: ``` x.cppm -> x.pcm -> x.o ``` That said we compile `x.o` from `x.pcm`. There is a reading BMI process. The goal of the patch is to remove the reading process. https://github.com/llvm/llvm-project/pull/71773 _______________________________________________ cfe-commits mailing list cfe-commits@lists.llvm.org https://lists.llvm.org/cgi-bin/mailman/listinfo/cfe-commits
