[quote=99220]no luck here 
tried to compile using your newest script but it doesn’t compile saying that reicast.elf is missing.
[/quote]
So, you might want to give it a go manually, without the help of the RetroPie-Setup scripts. Or actually, you might just need to update your RetroPie-Setup repo! Try sudo ~/RetroPie-Setup/retropie_setup.sh and select the U Update RetroPie-Setup script option and then restart the Pi, and try building the Dreamcast emulator again.
If that doesn’t do it for ya, here are some commands to build and install the latest Reicast .elf files over top of your existing installation:
`
cd ~
git clone https://github.com/free5ty1e/reicast-emulator.git
cd reicast-emulator
git checkout free5ty1e/rpi2/multiplayer
cd shell/rapi2
make
sudo cp -v *.elf /opt/retropie/emulators/reicast/
`
If you didn’t see any errors there, and you saw the two .elf files copy over, your Reicast should be up to date.
If this is the only method that works for building Reicast for you, then here are commands to update and build the latest changes (this will also be faster as it will only recompile the changed files, so you will get updates in a matter of seconds instead of 5-10 minutes for a full build.)
`
cd ~/reicast-emulator
git pull
cd shell/rapi2
make
sudo cp -v *.elf /opt/retropie/emulators/reicast/
`
If you WANT to perform a full / clean build, add a make clean command before the make command.
Hope this helps enable more Dreamcast!!