[llvm-bugs] [Bug 45596] New: --cuda-noopt-device-debug doesn't define __CUDACC_DEBUG__

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https://bugs.llvm.org/show_bug.cgi?id=45596

            Bug ID: 45596
           Summary: --cuda-noopt-device-debug doesn't define
                    __CUDACC_DEBUG__
           Product: clang
           Version: trunk
          Hardware: PC
                OS: Linux
            Status: NEW
          Severity: enhancement
          Priority: P
         Component: CUDA
          Assignee: unassignedclangbugs at nondot.org
          Reporter: raul at tambre.ee
                CC: llvm-bugs at lists.llvm.org

NVCC defines __CUDACC_DEBUG__ if device debug code generation is enabled. It
would probably be nice if Clang did the same.

CMake has a test that checks for this define when using NVCC with device debug
code generation.
See
https://gitlab.kitware.com/cmake/cmake/-/merge_requests/4442/diffs#note_737556.

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