[PATCH] D61949: [OpenMP][bugfix] Fix issues with C++ 17 compilation when handling math functions

[Jonas Hahnfeld via Phabricator via cfe-commits]

Hahnfeld added inline comments.


================
Comment at: lib/Headers/__clang_cuda_device_functions.h:1477
 #endif // CUDA_VERSION >= 9020
+#if __cplusplus >= 201703L
+__DEVICE__ int abs(int __a) noexcept { return __nv_abs(__a); }
----------------
If I recall correctly, `__cplusplus` is not defined in C mode, so both GCC and Clang will issue a warning with `-Wundef`.

Maybe this can be solved with something similar to:
```lang=c
#ifdef __cplusplus
#define cpp_version __cplusplus
#else
#define cpp_version 0
#endif
```
(to avoid repetition of `#if defined(__cplusplus) && __cplusplus >= 201703L`)


Repository:
  rC Clang

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D61949/new/

https://reviews.llvm.org/D61949