> Unless you want to use any other library on the OS, for example 3D graphics drivers which tend to have hardware-specific parts in userspace. Not sure what yo

> Unless you want to use any other library on the OS, for example 3D graphics drivers which tend to have hardware-specific parts in userspace. Not sure what you mean regarding this and glibc. > Which is why noone does it unless they have a very good reason. I think you changed the meaning of my sentence to be able to make this reply. I was referring to what Linux does re: syscalls vs. library exports, not hard-coding syscall numbers in the source code.