tra created this revision.
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In CUDA-9 some of device-side math functions that we need are conditionally
defined within '#if _GLIBCXX_MATH_H'. We need to temporarily undo the guard
around inclusion of math_functions.hpp
https://reviews.llvm.org/D37906
Files:
clang/lib/Headers/__clang_cuda_runtime_wrapper.h
Index: clang/lib/Headers/__clang_cuda_runtime_wrapper.h
===================================================================
--- clang/lib/Headers/__clang_cuda_runtime_wrapper.h
+++ clang/lib/Headers/__clang_cuda_runtime_wrapper.h
@@ -254,7 +254,17 @@
#pragma push_macro("__GNUC__")
#undef __GNUC__
#define signbit __ignored_cuda_signbit
+
+// CUDA-9 omits device-side definitions of some math functions if it sees
+// include guard from math.h wrapper from libstdc++. We have to undo the header
+// guard temporarily to get the definitions we need.
+#pragma push_macro("_GLIBCXX_MATH_H")
+#if CUDA_VERSION >= 9000
+#undef _GLIBCXX_MATH_H
+#endif
+
#include "math_functions.hpp"
+#pragma pop_macro("_GLIBCXX_MATH_H")
#pragma pop_macro("__GNUC__")
#pragma pop_macro("signbit")
Index: clang/lib/Headers/__clang_cuda_runtime_wrapper.h
===================================================================
--- clang/lib/Headers/__clang_cuda_runtime_wrapper.h
+++ clang/lib/Headers/__clang_cuda_runtime_wrapper.h
@@ -254,7 +254,17 @@
#pragma push_macro("__GNUC__")
#undef __GNUC__
#define signbit __ignored_cuda_signbit
+
+// CUDA-9 omits device-side definitions of some math functions if it sees
+// include guard from math.h wrapper from libstdc++. We have to undo the header
+// guard temporarily to get the definitions we need.
+#pragma push_macro("_GLIBCXX_MATH_H")
+#if CUDA_VERSION >= 9000
+#undef _GLIBCXX_MATH_H
+#endif
+
#include "math_functions.hpp"
+#pragma pop_macro("_GLIBCXX_MATH_H")
#pragma pop_macro("__GNUC__")
#pragma pop_macro("signbit")
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