llvm-link issues when combining BC files. about llvm HOT 3 OPEN

Try clang-cl instead of clang since you are using the VS linker.

from llvm.

Seems to have the same issue, but maybe I'm doing something wrong.. Here's what I did:
clang-cl.exe -Xclang -emit-llvm -c one.cpp two.cpp
The above command created one.obj and two.obj, but they did seem to be bc files.
llvm-link.exe one.obj two.obj -o combined.bc
I could not figure out how to directly compile bc files with clang-cl, so I did..
llc.exe -filetype=obj combined.bc -o combined.obj
clang-cl.exe combined.obj -o test.exe
Received same COMDAT error as before.

from llvm.

Your command line looks okay. If you use clang-cl it will generate bc files. If you use /FA it will generate ll files but clang-cl will also error out because its not setup properly to do that.

I was able to reproduce your problem but I don't think this is a VS linker issue. This is most likely a problem in llvm-link. You'd probably get a better response on the LLVM developer mailing list since Microsoft doesn't develop clang-cl or llvm-link or llc.

from llvm.