From 33192e1b5f1cc8cce95f4d69cf7ecf0b6269f84b Mon Sep 17 00:00:00 2001
From: Robert Maynard <robert.maynard@kitware.com>
Date: Mon, 6 Jul 2020 17:46:03 -0400
Subject: FindMPI: Pass -pthread to NVCC through -Xlinker for device linking

Fixes: #20924
---
 Modules/FindMPI.cmake | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/Modules/FindMPI.cmake b/Modules/FindMPI.cmake
index 45c0eb0..25de562 100644
--- a/Modules/FindMPI.cmake
+++ b/Modules/FindMPI.cmake
@@ -1164,6 +1164,8 @@ macro(_MPI_create_imported_target LANG)
   set_property(TARGET MPI::MPI_${LANG} PROPERTY INTERFACE_COMPILE_DEFINITIONS "${MPI_${LANG}_COMPILE_DEFINITIONS}")
 
   if(MPI_${LANG}_LINK_FLAGS)
+    string(REPLACE "-pthread" "$<$<LINK_LANG_AND_ID:CUDA,NVIDIA>:-Xlinker >-pthread"
+      _MPI_${LANG}_LINK_FLAGS "${MPI_${LANG}_LINK_FLAGS}")
     set_property(TARGET MPI::MPI_${LANG} PROPERTY INTERFACE_LINK_OPTIONS "SHELL:${MPI_${LANG}_LINK_FLAGS}")
   endif()
   # If the compiler links MPI implicitly, no libraries will be found as they're contained within
-- 
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