This function is missing on some platforms:
glibc 2.7, 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.
This function has an incompatible API on some platforms:
FreeBSD 13.2.