The recent switch from SJLJ exception handling to Dwarf2 breaks the compatibility with upstream Mingw-w64 which still sticks to SJLJ: https://sourceforge.net/p/mingw-w64/wiki2/Exception%20Handling/.
It is now no longer possible to use for example the Mingw-w64 cross packages from Cygwin for cross builds targeting 32 bit Windows on latest Debian. That's how I generated the Windows binaries for QEMU and Tesseract during the last years. Regards, Stefan W.