Done. Generated 133/133 projects.
Linking mamearcadeui64.exe...
../../../../mingw-gcc/bin/x64/Release/mame_arcade/liboptional.a(ps2gs.o):ps2gs.cpp:(.rdata$.refptr._ZTV13device_finderI15ps2_intc_deviceLb1EE[.refptr._ZTV13device_finderI15ps2_intc_deviceLb1EE]+0x0): undefined reference to `vtable for device_finder'
collect2.exe: error: ld returned 1 exit status
make[2]: *** [mamearcade.make:265: ../../../../../mamearcadeui64.exe] Error 1
make[1]: *** [Makefile:409: mamearcade] Error 2
make: *** [makefile:1032: windows_x64] Error 2