[PATCH] D39586: [CUDA] Mark CUDA as a no-errno platform.

[Justin Lebar via Phabricator via cfe-commits]

jlebar created this revision.

CUDA doesn't support errno at all, so this is the right thing -- or at
least, in the right direction.

But also, this unbreaks the CUDA test-suite math tests [0] after https://reviews.llvm.org/D39481.
__cuda_cmath.h forwards nexttoward() to __builtin_nexttoward, which,
after that patch, was lowering to a libcall that doesn't exist in NVPTX.

[0] http://lab.llvm.org:8011/builders/clang-cuda-build/builds/14999


https://reviews.llvm.org/D39586

Files:
  clang/lib/Driver/ToolChains/Cuda.h


Index: clang/lib/Driver/ToolChains/Cuda.h
===================================================================
--- clang/lib/Driver/ToolChains/Cuda.h
+++ clang/lib/Driver/ToolChains/Cuda.h
@@ -157,6 +157,7 @@
   bool isPICDefaultForced() const override { return false; }
   bool SupportsProfiling() const override { return false; }
   bool SupportsObjCGC() const override { return false; }
+  bool IsMathErrnoDefault() const override { return false; }
 
   void AddCudaIncludeArgs(const llvm::opt::ArgList &DriverArgs,
                           llvm::opt::ArgStringList &CC1Args) const override;


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