[saagarjha]

I know how dynamic linkers work and am not arguing against using the libc interface in general. I'm saying that this program intentionally doesn't use those interfaces.

[vetinari]

This can be a problem on macOS; Apple doesn't keep compatibility among releases at sysenter level.

Golang used to run into this, they switched to using libSystem in 1.11: https://golang.org/doc/go1.11#runtime

[andy_threos_io]

The system call library is NOT libc.

[saagarjha]

Then Apple doesn't have it.

[andy_threos_io]

/usr/lib/system/libsystem_kernel.dylib

[andy_threos_io]

you don't know about it

/usr/lib/system/libsystem_kernel.dylib

ex. https://stackoverflow.com/questions/37656016/osx-setgid-syst...

[saagarjha]

That's part of libSystem, macOS's libc implementation…