> Not being a troll here... Why would anyone care unless they are writing a libc replacement? Linux doesn't have any single fixed libc, the system call interfa

> Not being a troll here... Why would anyone care unless they are writing a libc replacement? Linux doesn't have any single fixed libc, the system call interface is the public API. Indeed there are many different libc's used in different linux applications - glibc on many desktop distros, bionic libc on android, uclibc, musl and others on various embedded/specialized setups.