Sergey, > Well, we generally try to stick close to the ABI that Linux uses > (calling convention-wise), because why wouldn't we. But it's not > automatic, the *-gnu target has to be defined in GCC & binutils, even > if it's defined similarly to the *-linux-gnu and the BSD targets. See > gcc:gcc/config/aarch64/aarch64-gnu.h for example. So we need to submit > our target upstream either way. (And there's no default Mach ABI, but > there are targets for GNU/Hurd systems on various architectures.)
Since GCC 16, there is actually a riscv64-gnu target upstream [1]. LLVM also introduced a riscv64-gnu target not too later [2]. [1]: https://gcc.gnu.org/git/?p=gcc.git;a=commitdiff;h=869f2ab30ad53033ad6ac82569d74ce3a99fe510 [2]: https://github.com/llvm/llvm-project/pull/157212 Hakan
