> it would be possible to add support for alloc and std without libc on Linux specifically (since it has a stable syscall ABI).
Well yes that’s a Linux specific target so that’s kinda the point.
Technically you could do libcless on a few other platforms which are not actively hostile to it (yet) like freebsd, but that would have no chance of getting to tier 2 if it was even accepted.
I just remembered that there is also https://github.com/sunfishcode/eyra (but I think it might be a dead project) which is close to that, it had slipped my mind.
All of these are going to mean you can't link any (non-freestanding) C code, load any dylibs, etc. So you will be fairly limited in what sort of applications you can write. Forget most GUI frameworks, even native ones. You won't be able to load GL or Vulkan drivers for example. You are basically stuck with command line or servers.