arc4random_buf
--------------

Documentation:

  * High Quality Random Number Functions (libc),

  * man arc4random.

Gnulib module: ---

Portability problems fixed by Gnulib:

Portability problems not fixed by Gnulib:

  * This function is missing on some platforms: glibc 2.35, AIX 7.3.1, HP-UX 11.31, Solaris 11.3, Cygwin 1.7.x, mingw, MSVC 14.