Okay error resolved. I guess i should have noticed this myself but there is a typo in @madskjeldgaard README.md. It should be
./guttersynth.sh x86_64
not
./guttersynth-sc.sh x86_64
Also worth noting that i didn’t have command line tools or brew installed but once these were in place it all worked (with the exception of the VSTs). Thanks for all the help @thresholdpeople!
Hi @madskjeldgaard a bit late to this discussion but was just trying to compile some Faust stuff using the online IDE for a Apple Silicon machine (not mine). Doesn’t seem to have an arm option, binaries only x64. I assume I could adjust your script to use arm64 and should work? Or is there an easier way these days.
Hi Scott – you should be able to use the -m flag – eg. -m arm64 when running faust2sc.py
You can also run faust2sc.py -h to get more info 
Ah sorry, didn’t see about the IDE. I don’t know if it uses the faust2sc.py script yet – haven’t checked. Otherwise open an issue, but the command line tool should get you there.
I think they just haven’t updated the online compiler to do arm builds yet. I don’t believe this is a script issue. Command-line it is for now.
Thanks both for the helpful replies!
Hmm…
clang: error: the clang compiler does not support '-march=native'
that collection was really helpful, thanks!
I managed to compile vstplugin today (“yey”)
so to summarize in the hope that this might help someone in the future:
get the scripts:
git clone --recurse-submodule https://github.com/madskjeldgaard/sc-plugins-build-scripts
go to the script folder:
cd sc-plugins-build-scripts
make sure xcode is installed
xcode-select --install
activate the command line tools:
sudo xcode-select --switch /Library/Developer/CommandLineTools
run the script and for M1 with the actual arm64(!) option not just arm:
./vstplugin.sh arm64
and in general: thank you all you lovely forum people for coming up with solutions!
best
sem