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Hi, No I didn't, I used cl.exe from the visual studio toolchain. What I'm proposing is a tool for processing .obj files in COFF format, reading them and generating the GHASH part. To make our build faster we use hundreds of unity build files (.cpp's with a lot of other .cpp's in them aka munch files) but still have a lot of single .cpp's as well (in total something like 3.4k

-lldb-dev, +llvm-dev lldb-dev is specifically for the llvm debugger, and llvm-dev is for everything else (including lld) Did you compile the object files with clang and use -mllvm -emit-codeview-ghash-section? It sounds like probably not. If you don’t do that /DEBUG:GHASH will indeed be much slower. I wonder if we should emit a linker diagnostic in this case On Fri, Jan 19, 2018 at 12:09 PM

..., I can offer some guidance on where to look in the code. Otherwise it's something that we'll probably get to, I'm just not sure when. > -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.llvm.org/pipermail/llvm-dev/attachments/20180119/146e560a/attachment.html>