[0mp]

You may try out generic eBPF outside of Linux: https://github.com/generic-ebpf/generic-ebpf

[0b01]

LLVM also has a BPF backend so you can compile any C++/C program to run on BPF.

[mhh__]

There is also a bpf triple for gcc (I say that having never been able to actually use it)