From: Daniel Arndt <arndtd@ornl.gov>
Date: Sun, 16 Jul 2023 16:56:45 +0000 (-0400)
Subject: Check for ArborX C++20 bug
X-Git-Tag: relicensing~667^2
X-Git-Url: https://gitweb.dealii.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=refs%2Fpull%2F15757%2Fhead;p=dealii.git

Check for ArborX C++20 bug
---

diff --git a/cmake/configure/configure_50_arborx.cmake b/cmake/configure/configure_50_arborx.cmake
index 5b0070ec18..7c65183aa8 100644
--- a/cmake/configure/configure_50_arborx.cmake
+++ b/cmake/configure/configure_50_arborx.cmake
@@ -46,6 +46,33 @@ macro(feature_arborx_find_external var)
         )
       set(${var} FALSE)
     endif()
+
+    list(APPEND CMAKE_REQUIRED_LIBRARIES
+      ArborX::ArborX
+    )
+
+    check_cxx_compiler_bug(
+      "
+      #include <ArborX.hpp>
+      int main() {
+        Kokkos::View<ArborX::Point*, Kokkos::HostSpace> points(\"points\", 0);
+        [[maybe_unused]] ArborX::BVH<Kokkos::HostSpace> bvh(Kokkos::DefaultExecutionSpace{}, points);
+      }
+      "
+      DEAL_II_ARBORX_CXX20_BUG)
+    reset_cmake_required()
+
+    if(DEAL_II_ARBORX_CXX20_BUG)
+      message(STATUS "Could not find a sufficient ArborX installation: "
+        "The ArborX version doesn't work with C++20 or higher."
+        )
+      set(ARBORX_ADDITIONAL_ERROR_STRING
+        ${ARBORX_ADDITIONAL_ERROR_STRING}
+        "Could not find a sufficient ArborX installation:\n"
+        "The ArborX version doesn't work with C++20 or higher. Try using a later ArborX release or try specifying a lower C++ standard.\n"
+        )
+      set(${var} FALSE)
+    endif()
   endif()
 
   set(DEAL_II_ARBORX_WITH_MPI ${ARBORX_WITH_MPI})