[all-commits] [llvm/llvm-project] 686994: [Clang][HIP/CUDA] Guard declarations of cmath comp...

[Juan Manuel Martinez Caamaño via All-commits]

  Branch: refs/heads/users/jmmartinez/fix_hip_build_in_windows
  Home:   https://github.com/llvm/llvm-project
  Commit: 686994add2e69eb761b352235e4f0b5ef6a35120
      https://github.com/llvm/llvm-project/commit/686994add2e69eb761b352235e4f0b5ef6a35120
  Author: Juan Manuel Martinez Caamaño <jmartinezcaamao at gmail.com>
  Date:   2026-05-29 (Fri, 29 May 2026)

  Changed paths:
    M clang/lib/Headers/__clang_cuda_cmath.h
    M clang/lib/Headers/__clang_cuda_math_forward_declares.h
    M clang/lib/Headers/__clang_cuda_runtime_wrapper.h

  Log Message:
  -----------
  [Clang][HIP/CUDA] Guard declarations of cmath comparisons when using Microsoft's STL

In HIP, constexpr functions are treated as both, __host__ and
__device__.

A new version of the MS STL shipped with the build tools version 14.51.36231
has constexpr definitions for some cmath functions when the compiler in use is Clang.

These definitions conflict with the __device__ delcarations we provide in
the header wrappers.

This patch guards these declarations/definitions to use the ones coming
from the STL.



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