The menu icon and the toolbar icon below do not appear --- Cross compile for --host=i686-w64-mingw32

[davids]

Hello everyone, I am trying to compile VLC3.0.8 on the UBUNTU 18.04 currently.
And I follow the steps of this URL to compile "https://wiki.videolan.org/Win32Compile/#Obtaining_the_toolchain".
Now i have compiled it through.

But when I run it, the function is normal, but the default icon does not appear.
The menu icon and the toolbar icon below do not appear. The main program icon is also missing.
It should be that the svg icons in "modules/gui/qt/pixmaps" are not loaded. But the Makefile did compile these resources when compiling.
These resources should be compiled into "plugins/gui/libqt_plugin.dll".
But none of the program's icons appear.

Thank you very much for your help!