From 75f64e6b71400a3b726dddf09119ac9563bedc45 Mon Sep 17 00:00:00 2001
From: Bruno Turcksin <bruno.turcksin@gmail.com>
Date: Mon, 28 Oct 2024 17:10:54 -0400
Subject: [PATCH] Call find_package(Kokkos) if PETSc is compiled with Kokkos
 support

---
 cmake/modules/FindDEAL_II_PETSC.cmake | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/cmake/modules/FindDEAL_II_PETSC.cmake b/cmake/modules/FindDEAL_II_PETSC.cmake
index f304cb83cc..445490aed5 100644
--- a/cmake/modules/FindDEAL_II_PETSC.cmake
+++ b/cmake/modules/FindDEAL_II_PETSC.cmake
@@ -193,6 +193,17 @@ if(NOT PETSC_PETSCVARIABLES MATCHES "-NOTFOUND")
 
     endif()
   endforeach()
+
+  # PETSc does not expose Kokkos version, so we need to search for Kokkos
+  # ourselves.
+  if(PETSC_WITH_KOKKOS)
+    file(STRINGS "${PETSC_PETSCVARIABLES}" KOKKOS_INCLUDE
+      REGEX "^KOKKOS_INCLUDE =.*")
+    string(REGEX REPLACE "^KOKKOS_INCLUDE = -I" "" KOKKOS_INCLUDE "${KOKKOS_INCLUDE}")
+    find_package(Kokkos 3.7.0 QUIET
+      HINTS ${KOKKOS_INCLUDE}/..
+      )
+  endif()
 endif()
 
 if(PETSC_WITH_MPIUNI)
-- 
2.39.5