The author doesn't mention POSIX at all despite it being what most operating system interfaces are based on. POSIX describes its interface (types and procedure

The author doesn't mention POSIX at all despite it being what most operating system interfaces are based on. POSIX describes its interface (types and procedures) with Standard C and specifically requires that a compliant system has a C compiler available. If you want to get rid of C, you will have to get rid of POSIX too or have POSIX use something else. POSIX specification: https://pubs.opengroup.org/onlinepubs/9699919799/ https://pubs.opengroup.org/onlinepubs/9699919799/