> 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.
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.
> Overall it seems to me like coding against direct syscall numbers is a disadvantage on almost every front.
Which is why noone does it unless they have a very good reason.