This function exists only on Linux and is therefore
missing on all non-glibc platforms:
glibc 2.27, macOS 11.1, FreeBSD 14.0, NetBSD 9.0, OpenBSD 6.7, Minix 3.1.8, AIX 7.1, HP-UX 11.31, IRIX 6.5, Solaris 11.4, Cygwin 1.7.x, mingw, MSVC 14, Android 9.0.