I didn't see it mentioned at a cursory glance of the comments, but syscalls != standard library. Standard Libraray for C is that which is defined by the ISO C s

I didn't see it mentioned at a cursory glance of the comments, but syscalls != standard library. Standard Libraray for C is that which is defined by the ISO C standard. syscalls are whatever *nix decides them to be. Additionally Standard Library != posix. Sure, there may be some overlap or interleaving between Standard Libraries, syscalls, and posix, but they are definitely not the same.