[PATCH] D102936: [CUDA] Work around compatibility issue with libstdc++ 11.1.0

[Artem Belevich via Phabricator via cfe-commits]

tra created this revision.
tra added reviewers: jlebar, jwakely.
Herald added subscribers: bixia, yaxunl.
tra requested review of this revision.
Herald added a project: clang.

libstdc++ 11.1.0 redeclares __failed_assertion multiple times and that results in the
function declared with conflicting set of attributes when we include <complex>
with __host__ __device__ attributes force-applied to all functions.

In order to work around the issue, we rename __failed_assertion within the
region with forced attributes.

See https://bugs.llvm.org/show_bug.cgi?id=50383 for the details.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D102936

Files:
  clang/lib/Headers/cuda_wrappers/complex


Index: clang/lib/Headers/cuda_wrappers/complex
===================================================================
--- clang/lib/Headers/cuda_wrappers/complex
+++ clang/lib/Headers/cuda_wrappers/complex
@@ -72,8 +72,16 @@
 #define _GLIBCXX_USE_C99_COMPLEX 0
 #define _GLIBCXX_USE_C99_COMPLEX_TR1 0
 
+// Work around a compatibility issue with libstdc++ 11.1.0
+// https://bugs.llvm.org/show_bug.cgi?id=50383
+#pragma push_macro("__failed_assert")
+#if _GLIBCXX_RELEASE == 11 && __GLIBCXX__ == 20210427
+#define __failed_assertion __cuda_failed_assertion
+#endif
+
 #include_next <complex>
 
+#pragma pop_macro("__failed_assert")
 #pragma pop_macro("_GLIBCXX_USE_C99_COMPLEX_TR1")
 #pragma pop_macro("_GLIBCXX_USE_C99_COMPLEX")
 


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