[llvm-bugs] [Bug 44971] New: Not able to disable CUDA offloading

[via llvm-bugs]

https://bugs.llvm.org/show_bug.cgi?id=44971

            Bug ID: 44971
           Summary: Not able to disable CUDA offloading
           Product: Build scripts
           Version: trunk
          Hardware: All
                OS: All
            Status: NEW
          Severity: normal
          Priority: P
         Component: cmake
          Assignee: unassignedbugs at nondot.org
          Reporter: alexander.grund at tu-dresden.de
                CC: llvm-bugs at lists.llvm.org

The CMake build system only allows to enable or disable the OpenMP target
offloading completely via OPENMP_ENABLE_LIBOMPTARGET. But it is not possible to
disable a specific backend, e.g. CUDA. If CMake finds CUDA it will be enabled
even if the CUDA found is not what is wanted. This may lead to e.g.
https://bugs.llvm.org/show_bug.cgi?id=39388

--> There should be an option to disable specific backends, at least once that
require some external dependency (e.g CUDA)

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