From: Justin Lebar <jlebar@google.com>
Date: Fri, 3 Nov 2017 02:30:00 +0000 (+0000)
Subject: [CUDA] Mark CUDA as a no-errno platform.
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=324e0a9695a1682b11e60f5c22024243fa2246d3;p=clang

[CUDA] Mark CUDA as a no-errno platform.

Summary:
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 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

Reviewers: tra

Subscribers: sanjoy, cfe-commits

Differential Revision: https://reviews.llvm.org/D39586

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@317297 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/lib/Driver/ToolChains/Cuda.h b/lib/Driver/ToolChains/Cuda.h
index 414c9445c7..3101cb3ab7 100644
--- a/lib/Driver/ToolChains/Cuda.h
+++ b/lib/Driver/ToolChains/Cuda.h
@@ -157,6 +157,7 @@ public:
   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;