CMAKE_CUDA_FLAGS passed to linking operations?

mblanchard
Thu, 05 Mar 2026 08:59:20 +0000
Usage

Upgrading from CMake 3.29.2 to 4.2.2, and building CPU and GPU code with Clang, it seems like CMAKE_CUDA_FLAGS are now pass to linking operations with 4.2.2, while they were not (at least with our setup) with 3.29.2. We noticed because, now with 4.2.2, some linking operations are failing in error of the like:

clang++: error: argument unused during compilation: ‘-Xarch_host -ffp-exception-behavior=strict’ [-Werror,-Wunused-command-line-argument]

Looking at release notes and policy changes, I haven’t been able to identify the new/changed CMake behavior that could explain it, hence the question here: is it intended or have I missed something?

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