Thank you. What is the intended build system? I see you've added empty NEWS etc files, but the configure script is still broken for me (config.log shows SDL test program fails with:

gcc: fatal error: cannot read spec file 'libgomp.spec': No such file or directory

I get further with cmake (which is not mentioned at all in the INSTALL file) but compilation still fails with:

/home/dtal/d2x-xl/audio/songs.cpp:48:29: error: narrowing conversion of '3759186702' from 'unsigned int' to 'int' [-Wnarrowing]

This a warning, not an error, so I assume the working system calls GCC with the correct flags. It would be great if you could update the documentation with working instructions.