Update Kokkos library in LAMMPS to v3.2

lib/kokkos/cmake/kokkos_enable_devices.cmake

@@ -36,25 +36,51 @@ IF(KOKKOS_ENABLE_OPENMP)
   IF(KOKKOS_CLANG_IS_CRAY)
     SET(ClangOpenMPFlag -fopenmp)
   ENDIF()
-  COMPILER_SPECIFIC_FLAGS(
-    Clang      ${ClangOpenMPFlag}
-    AppleClang -Xpreprocessor -fopenmp
-    PGI        -mp
-    NVIDIA     -Xcompiler -fopenmp
-    Cray       NO-VALUE-SPECIFIED
-    XL         -qsmp=omp
-    DEFAULT    -fopenmp
-  )
-  COMPILER_SPECIFIC_LIBS(
-    AppleClang -lomp
-  )
+  IF(KOKKOS_CLANG_IS_INTEL)
+    SET(ClangOpenMPFlag -fiopenmp)
+  ENDIF()
+  IF(KOKKOS_CXX_COMPILER_ID STREQUAL Clang AND "x${CMAKE_CXX_SIMULATE_ID}" STREQUAL "xMSVC")
+    #expression /openmp yields error, so add a specific Clang flag
+    COMPILER_SPECIFIC_OPTIONS(Clang /clang:-fopenmp)
+    #link omp library from LLVM lib dir
+    get_filename_component(LLVM_BIN_DIR ${CMAKE_CXX_COMPILER_AR} DIRECTORY)
+    COMPILER_SPECIFIC_LIBS(Clang "${LLVM_BIN_DIR}/../lib/libomp.lib")
+  ELSEIF(KOKKOS_CXX_COMPILER_ID STREQUAL NVIDIA)
+    COMPILER_SPECIFIC_FLAGS(
+      COMPILER_ID KOKKOS_CXX_HOST_COMPILER_ID
+      Clang      -Xcompiler ${ClangOpenMPFlag}
+      PGI        -Xcompiler -mp
+      Cray       NO-VALUE-SPECIFIED
+      XL         -Xcompiler -qsmp=omp
+      DEFAULT    -Xcompiler -fopenmp
+    )
+  ELSE()
+    COMPILER_SPECIFIC_FLAGS(
+      Clang      ${ClangOpenMPFlag}
+      AppleClang -Xpreprocessor -fopenmp
+      PGI        -mp
+      Cray       NO-VALUE-SPECIFIED
+      XL         -qsmp=omp
+      DEFAULT    -fopenmp
+    )
+    COMPILER_SPECIFIC_LIBS(
+      AppleClang -lomp
+    )
+  ENDIF()
 ENDIF()
 
 KOKKOS_DEVICE_OPTION(OPENMPTARGET OFF DEVICE "Whether to build the OpenMP target backend")
 IF (KOKKOS_ENABLE_OPENMPTARGET)
+SET(ClangOpenMPFlag -fopenmp=libomp)
+  IF(KOKKOS_CLANG_IS_CRAY)
+    SET(ClangOpenMPFlag -fopenmp)
+  ENDIF()
+
   COMPILER_SPECIFIC_FLAGS(
-    Clang      -fopenmp -fopenmp=libomp
+    Clang      ${ClangOpenMPFlag} -Wno-openmp-mapping
+    IntelClang -fiopenmp -Wno-openmp-mapping
     XL         -qsmp=omp -qoffload -qnoeh
+    PGI        -mp=gpu
     DEFAULT    -fopenmp
   )
   COMPILER_SPECIFIC_DEFS(
@@ -65,6 +91,9 @@ IF (KOKKOS_ENABLE_OPENMPTARGET)
 #  COMPILER_SPECIFIC_LIBS(
 #    Clang -lopenmptarget
 #  )
+   IF(KOKKOS_CXX_STANDARD LESS 17)
+     MESSAGE(FATAL_ERROR "OpenMPTarget backend requires C++17 or newer")
+   ENDIF()
 ENDIF()
 
 IF(Trilinos_ENABLE_Kokkos AND TPL_ENABLE_CUDA)
@@ -76,6 +105,9 @@ KOKKOS_DEVICE_OPTION(CUDA ${CUDA_DEFAULT} DEVICE "Whether to build CUDA backend"
 
 IF (KOKKOS_ENABLE_CUDA)
   GLOBAL_SET(KOKKOS_DONT_ALLOW_EXTENSIONS "CUDA enabled")
+  IF(WIN32)
+    GLOBAL_APPEND(KOKKOS_COMPILE_OPTIONS -x cu)
+  ENDIF()
 ENDIF()
 
 # We want this to default to OFF for cache reasons, but if no