Set SYCL_EXT_ONEAPI_COMPLEX on Windows as well

Author: oleksandr-pavlyk

Diff for: dpctl/tensor/CMakeLists.txt

@@ -62,10 +62,15 @@ set_source_files_properties(
   ${CMAKE_CURRENT_SOURCE_DIR}/libtensor/source/elementwise_functions.cpp
   PROPERTIES COMPILE_OPTIONS "${_clang_prefix}-fno-fast-math")
 if (UNIX)
-  set_source_files_properties(
-    ${CMAKE_CURRENT_SOURCE_DIR}/libtensor/source/elementwise_functions.cpp
-    PROPERTIES COMPILE_DEFINITIONS "USE_STD_ABS_FOR_COMPLEX_TYPES;USE_STD_SQRT_FOR_COMPLEX_TYPES;SYCL_EXT_ONEAPI_COMPLEX")
+  set(_compiler_definitions "USE_STD_ABS_FOR_COMPLEX_TYPES;USE_STD_SQRT_FOR_COMPLEX_TYPES;SYCL_EXT_ONEAPI_COMPLEX")
+else()
+  set(_compiler_definitions "SYCL_EXT_ONEAPI_COMPLEX")
 endif()
+set_source_files_properties(
+    ${CMAKE_CURRENT_SOURCE_DIR}/libtensor/source/elementwise_functions.cpp
+    PROPERTIES COMPILE_DEFINITIONS "${_compiler_definitions}"
+)
+
 target_compile_options(${python_module_name} PRIVATE -fno-sycl-id-queries-fit-in-int)
 target_link_options(${python_module_name} PRIVATE -fsycl-device-code-split=per_kernel)
 if(UNIX)