Test declaring SYCL headers as system to supress the warning there

Author: antonwolfy

dpnp/backend/extensions/blas/CMakeLists.txt

@@ -65,16 +65,16 @@ set_target_properties(
 
 target_include_directories(
     ${python_module_name}
-    PRIVATE ${CMAKE_CURRENT_SOURCE_DIR}/../../
+    PRIVATE ${CMAKE_CURRENT_SOURCE_DIR}/../../ ${CMAKE_CURRENT_SOURCE_DIR}/../common
 )
+
+# treat below headers as system to suppress the warnings there during the build
 target_include_directories(
     ${python_module_name}
-    PRIVATE ${CMAKE_CURRENT_SOURCE_DIR}/../common
+    SYSTEM
+    PRIVATE ${SYCL_INCLUDE_DIR} ${Dpctl_INCLUDE_DIRS} ${Dpctl_TENSOR_INCLUDE_DIR}
 )
 
-target_include_directories(${python_module_name} PUBLIC ${Dpctl_INCLUDE_DIRS})
-target_include_directories(${python_module_name} PUBLIC ${Dpctl_TENSOR_INCLUDE_DIR})
-
 if(WIN32)
     target_compile_options(
         ${python_module_name}