[llvm-bugs] [Bug 50505] New: -fno-cuda-host-device-constexpr not supported?

[via llvm-bugs]

https://bugs.llvm.org/show_bug.cgi?id=50505

            Bug ID: 50505
           Summary: -fno-cuda-host-device-constexpr not supported?
           Product: clang
           Version: trunk
          Hardware: PC
                OS: Linux
            Status: NEW
          Severity: release blocker
          Priority: P
         Component: CUDA
          Assignee: unassignedclangbugs at nondot.org
          Reporter: carlosgalvezp at gmail.com
                CC: llvm-bugs at lists.llvm.org

Hi,

We are compiling CUDA code with clang 12
(12.0.0~%2b%2b20210319082650%2b4990141a4366-1~exp1~20210319193429.62), and get
the following error:

error: constexpr function 'foo' without __host__ or __device__ attributes
cannot overload __device__ function with same signature.  Add a __host__
attribute, or build with -fno-cuda-host-device-constexpr.
[clang-diagnostic-error]

So we try to add "-fno-cuda-host-device-constexpr" when building, but it seems
to be unsupported:

clang: error: unknown argument: '-fno-cuda-host-device-constexpr'

What should we use instead?

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