missing file for cmake

cmake/features/NATIVE_GPU_STORAGE.cmake

@@ -0,0 +1,65 @@
+if( atlas_HAVE_ATLAS_FIELD AND ENABLE_NATIVE_GPU_STORAGE )
+
+### Native_GPU_Storage storage module
+
+    ### Native_GPU_Storage may search for CUDA, which searches for "Threads"
+    ### Set THREADS_HAVE_PTHREAD_ARG variable to false so that it can be recomputed based on
+    ### THREADS_PREFER_PTHREAD_FLAG, in case other project had it on a different setting.
+    ### This is certainly a CMake bug ( see ECKIT-426 )
+    set( THREADS_HAVE_PTHREAD_ARG FALSE )
+    if( NOT DEFINED THREADS_PREFER_PTHREAD_FLAG )
+      set( THREADS_PREFER_PTHREAD_FLAG 1 )
+    endif()
+
+ecbuild_add_option(
+  FEATURE NATIVE_GPU_STORAGE
+  DESCRIPTION "Arrays internally use Native_GPU_Storage storage layer"
+)
+
+ecbuild_add_option( FEATURE CUDA
+                    DESCRIPTION "Enable CUDA support via Native_GPU_Storage CUDA backend"
+                    )
+
+set( ATLAS_NATIVE_GPU_STORAGE_BACKEND_HOST 0 )
+set( ATLAS_NATIVE_GPU_STORAGE_BACKEND_CUDA 0 )
+set( atlas_HAVE_NATIVE_GPU_STORAGE 1 )
+
+if( atlas_HAVE_NATIVE_GPU_STORAGE )
+    if( atlas_HAVE_CUDA )
+
+        ecbuild_info( "Native GPU Storage with CUDA support" )
+
+        # Logic to check if we can use enable_language( CUDA )
+        #   - CMake already supports it (as Native_GPU_Storage requires version that supports it)
+        #   - ecbuild version 3.3 added support
+        #   - overriding mechanism possible with cached "atlas_CUDA_LANGUAGE_ENABLED" variable
+        if( DEFINED ecbuild_VERSION AND NOT ecbuild_VERSION VERSION_LESS 3.3 )
+            set( atlas_CUDA_LANGUAGE_ENABLED_DEFAULT ON )
+        else()
+            set( atlas_CUDA_LANGUAGE_ENABLED_DEFAULT OFF )
+        endif()
+        set( atlas_CUDA_LANGUAGE_ENABLED ${atlas_CUDA_LANGUAGE_ENABLED_DEFAULT} CACHE BOOL "atlas enables CUDA language" )
+
+        if( atlas_CUDA_LANGUAGE_ENABLED )
+            enable_language( CUDA )
+            ecbuild_info( "CUDA language enabled" )
+        else()
+            ecbuild_info("CUDA enabled through find_package(CUDA) instead of enable_language(CUDA)")
+            find_package( CUDA )
+        endif()
+
+        set( ATLAS_NATIVE_GPU_STORAGE_BACKEND_CUDA 1 )
+
+    else()
+
+        set( ATLAS_NATIVE_GPU_STORAGE_BACKEND_HOST 1 )
+
+    endif()
+endif()
+
+else()
+    set( HAVE_NATIVE_GPU_STORAGE 1 )
+    set( atlas_HAVE_NATIVE_GPU_STORAGE 0 )
+    set( ATLAS_NATIVE_GPU_STORAGE_BACKEND_CUDA 0 )
+    set( ATLAS_NATIVE_GPU_STORAGE_BACKEND_HOST 0 )
+endif()