Why are files like absvdi2.c or absvsi2.c still compiled?

According to the README, they are never called by LLVM and thus don't have to be implemented in Rust. But why is their C implementation being compiled?

While they are not called by LLVM, there are some builtins that are called by GCC-generated code. I haven't checked if this applies to these particular functions though.

IIRC this is mainly relevant when we are statically linking to GCC-generated C code, such as musl targets. I don't think we are linking to libgcc on those targets (maybe we should?).

hmmm so this sort of gets into the terrirory of #217 ? Either way, I think we should either reimplement those files in Rust, or remove them. But keeping them around and requiring people to have a C compiler for that platform around is not nice :)