IVGCVSW-3656 Make the reference backend optional

 * Made the build of the reference backend depend on a new ARMCOMPUTEREF
   macro
 * Made the relevant targets dependent on the ref backend
 * Moved Cl and Neon static registry initializers to separate files
 * Wrapped some of the unit tests into proper ifdefs where necessary

Change-Id: I7f2c42699682630233a4c4b6aed2f005083de189
Signed-off-by: Matteo Martincigh <matteo.martincigh@arm.com>

1 files changed, 31 insertions, 22 deletions

diff --git a/src/backends/reference/CMakeLists.txt b/src/backends/reference/CMakeLists.txt
index 6852ab0b74..ff253787a1 100644
--- a/src/backends/reference/CMakeLists.txt
+++ b/src/backends/reference/CMakeLists.txt
@@ -3,30 +3,39 @@
 # SPDX-License-Identifier: MIT
 #
 
-list(APPEND armnnRefBackend_sources
-    RefBackend.cpp
-    RefBackend.hpp
-    RefBackendId.hpp
-    RefTensorHandle.hpp
-    RefTensorHandle.cpp
-    RefLayerSupport.cpp
-    RefLayerSupport.hpp
-    RefMemoryManager.hpp
-    RefMemoryManager.cpp
-    RefRegistryInitializer.cpp
-    RefWorkloadFactory.cpp
-    RefWorkloadFactory.hpp
-    RefTensorHandleFactory.hpp
-    RefTensorHandleFactory.cpp
-)
+if(ARMCOMPUTEREF)
+    list(APPEND armnnRefBackend_sources
+        RefBackend.cpp
+        RefBackend.hpp
+        RefBackendId.hpp
+        RefTensorHandle.hpp
+        RefTensorHandle.cpp
+        RefLayerSupport.cpp
+        RefLayerSupport.hpp
+        RefMemoryManager.hpp
+        RefMemoryManager.cpp
+        RefRegistryInitializer.cpp
+        RefWorkloadFactory.cpp
+        RefWorkloadFactory.hpp
+        RefTensorHandleFactory.cpp
+        RefTensorHandleFactory.hpp
+    )
+
+    add_subdirectory(workloads)
+
+    if(BUILD_UNIT_TESTS)
+        add_subdirectory(test)
+    endif()
+
+else()
+    list(APPEND armnnRefBackend_sources
+        RefBackendId.hpp
+        RefLayerSupport.cpp
+        RefLayerSupport.hpp
+    )
+endif()
 
 add_library(armnnRefBackend OBJECT ${armnnRefBackend_sources})
 target_include_directories(armnnRefBackend PRIVATE ${PROJECT_SOURCE_DIR}/src/armnn)
 target_include_directories(armnnRefBackend PRIVATE ${PROJECT_SOURCE_DIR}/src/armnnUtils)
 target_include_directories(armnnRefBackend PRIVATE ${PROJECT_SOURCE_DIR}/src/backends)
-
-add_subdirectory(workloads)
-
-if(BUILD_UNIT_TESTS)
-    add_subdirectory(test)
-endif()