This may be exciting for everyone who wants to target the 6502 using modern languages: LLVM has a 6502 backend! See these presentation slides (PDF):
There’s also a GitHub repository and an early development blog at 6502.org (both linked at the end of the PDF):
It will be coming to Compiler Explorer shortly too!
Great! – Don’t forget to let us know, when it becomes available!
It’s now live! Find it on both C and C++ language : e.g. Compiler Explorer