[cmake][parallel] Make Dumux find and link against OpenMP, Kokkos and TBB

CMakeLists.txt

@@ -17,6 +17,7 @@ find_package(dune-common)
 
 list(APPEND CMAKE_MODULE_PATH ${dune-common_MODULE_PATH}
   "${PROJECT_SOURCE_DIR}/cmake/modules")
+
 #include the dune macros
 include(DuneMacros)
 

cmake/modules/AddKokkosFlags.cmake

+include_guard(GLOBAL)
+
+# set variable for config.h
+set(HAVE_KOKKOS ${Kokkos_FOUND})
+
+# perform DUNE-specific setup tasks
+if (Kokkos_FOUND)
+  dune_register_package_flags(
+    COMPILE_DEFINITIONS ENABLE_KOKKOS=1
+    LIBRARIES Kokkos::kokkos
+  )
+endif()

cmake/modules/AddOpenMPFlags.cmake

+include_guard(GLOBAL)
+
+# set variable for config.h
+set(HAVE_OPENMP ${OpenMP_FOUND})
+
+# perform DUNE-specific setup tasks
+if (OpenMP_FOUND)
+  dune_register_package_flags(
+    COMPILE_DEFINITIONS ENABLE_OPENMP=1
+    LIBRARIES OpenMP::OpenMP_CXX
+  )
+endif()

cmake/modules/DumuxMacros.cmake

@@ -13,3 +13,32 @@ find_package(NLOPT QUIET)
 find_package(PTScotch QUIET)
 include(AddPTScotchFlags)
 find_package(PVPython QUIET)
+
+find_package(Kokkos QUIET)
+include(AddKokkosFlags)
+
+# possibly link against TBB
+# even if an older version is found
+# otherwise we get linker errors
+# beacuse of inconsistencies with
+# dune-common's TBB setup
+find_package(TBB)
+include(AddTBBFlags)
+
+# in a second step make sure the
+# minimum TBB version required is found
+set(DUMUX_MIN_TBB_VERSION 2021)
+if(TBB_FOUND)
+  if(TBB_VERSION_MAJOR VERSION_LESS DUMUX_MIN_TBB_VERSION)
+    find_package(TBB ${DUMUX_MIN_TBB_VERSION})
+    # disable TBB manually if required version not found
+    if(NOT TBB_FOUND)
+      message(STATUS "Disabling TBB since version requirement not satisfied (>= ${DUMUX_MIN_TBB_VERSION}).")
+      set(ENABLE_TBB FALSE)
+      set(HAVE_TBB FALSE)
+    endif()
+  endif()
+endif()
+
+find_package(OpenMP QUIET)
+include(AddOpenMPFlags)

config.h.cmake

@@ -70,6 +70,12 @@
 /* Define to 1 if quadmath was found */
 #cmakedefine HAVE_QUAD 1
 
+/* Set if Kokkos was found */
+#cmakedefine HAVE_KOKKOS ENABLE_KOKKOS
+
+/* Set if OpenMP was found */
+#cmakedefine HAVE_OPENMP ENABLE_OPENMP
+
 /* end dumux
    Everything below here will be overwritten
 */