[llvm-bugs] [Bug 137762] Clang 20.1.3 UBSAN link on Windows fails on LLVM version update

[LLVM Bugs via llvm-bugs]

Issue	137762
Summary	Clang 20.1.3 UBSAN link on Windows fails on LLVM version update
Labels	clang
Assignees
Reporter	MisterBMisterB

    Dear all,

first of all, I appreciate your great work in the LLVM project. I'm using LLVM 19.1.2 for compiling C code on Windows. I created successfully debug, release, coverage, ASAN and UBSAN builds. Everything went fine.

When I upgrade to LLVM clang 20.1.3 the targets debug, release, coverage, ASAN build OK. When I try to build the  UBSAN target I get the following link error:

![Image](https://github.com/user-attachments/assets/70550cc4-58b4-4b8d-b47c-c209c601cc2e)

If I copy the LLVM 19.1.2 clang_rt.ubsan_standalone-x86_64.lib library to LLVM 20.1.3 installation everything build and run OK again.

Linking against a newer Windows SDK version also does not help.

What do I wrong? Has there anything changed inside the build philosophy for UBSAN? Has there anything accidential changed in clang_rt.ubsan_standalone-x86_64.lib?

Best regards

Michael

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