musl is a Linux libc, so you can't use in on any other OS (because it wouldn't know how to send syscalls to the kernel). macOS handles libc a little differentl

musl is a Linux libc, so you can't use in on any other OS (because it wouldn't know how to send syscalls to the kernel). macOS handles libc a little differently from Linux; whereas the Linux kernel publishes its syscall API, and allows programs to make syscalls however they want (e.g. with glibc or musl, or with go, which does syscalls itself), macOS's syscall API is subject to change at any time, and the only (supported) way to make syscalls is to dynamically link to the system libc.