Index: cfe/trunk/lib/Headers/__clang_cuda_runtime_wrapper.h =================================================================== --- cfe/trunk/lib/Headers/__clang_cuda_runtime_wrapper.h +++ cfe/trunk/lib/Headers/__clang_cuda_runtime_wrapper.h @@ -173,7 +173,18 @@ // __device__. #pragma push_macro("__forceinline__") #define __forceinline__ __device__ __inline__ __attribute__((always_inline)) + +#pragma push_macro("__float2half_rn") +#if CUDA_VERSION >= 9000 +// CUDA-9 has conflicting prototypes for __float2half_rn(float f) in +// cuda_fp16.h[pp] and device_functions.hpp. We need to get the one in +// device_functions.hpp out of the way. +#define __float2half_rn __float2half_rn_disabled +#endif + #include "device_functions.hpp" +#pragma pop_macro("__float2half_rn") + // math_function.hpp uses the __USE_FAST_MATH__ macro to determine whether we // get the slow-but-accurate or fast-but-inaccurate versions of functions like