On 6/25/21 2:34 PM, Dietmar May via Cygwin wrote:
> 
> ./configure --disable-werror --disable-doxygen-pdf --enable-ftdi 
> --enable-jlink --build=x86_64-w64-mingw32 --host=x86_64-w64-mingw32
> 

Don't set --build, you are building on Cygwin, not MSYS.