================
@@ -1460,6 +1460,11 @@ static void InitializePredefinedMacros(const TargetInfo
&TI,
}
}
+ // CUDA / HIP offloading only supports OpenMP's CPU support, but both
+ // compilations must define these macros to compile.
+ if (LangOpts.OpenMPMacros)
+ Builder.defineMacro("_OPENMP", "0");
----------------
jhuber6 wrote:
Only device code should be compiled, which shouldn't contain any OpenMP
pragmas. If you set this to a high value it would make `omp.h` stop working
because it uses OpenMP variants to define some functions. I just take this to
mean that it doesn't exist, but no code on the GPU should be using it anyway.
This is definitely a hack so I could see complaining to CMake about it instead.
https://github.com/llvm/llvm-project/pull/176791
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