examples: suppress a TBB warning

After including a TBB header to examples_utils.hpp the
compiler starts issuing a warning about __thiscall when
examples are built by DPC++ compiler on Windows (oneDNN
SYCL runtime).

Author: densamoilov

examples/CMakeLists.txt.in

@@ -116,6 +116,10 @@ else()
 endif()
 
 if(WIN32 AND DNNL_WITH_SYCL)
+    # XXX: SYCL does not like __thiscall convention coming from TBB,
+    # suppress warnings for now.
+    set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wno-ignored-attributes")
+
     # XXX: compiler always pulls in release C++ runtime by default, until
     # this is fixed we have to explicitly drop release C++ runtime for
     # debug build types.