That is because the code hasn't been updated yet.

I managed to get NEWUI working, however MESSUI will have to wait for MAMEUI to be fixed (it is shared code).

Also, I am utterly amazed anyone was able to compile at all, there are problems with lib/util/options.c & h

options.h - atof and atoi not defined, because emu.h isn't included

options.c - delete command at around line 299, gives a compile error which i did not understand, commented it out for now.

To get newui working it was necessary to take the scalpel to various mak files (and fix the error you reported), but finally it works. smile

I'm not comitting anything because I expect Micko will want to fix it properly, and sdl people had no issues compiling.