malloc_usable_size
------------------

Documentation:
 man malloc_usable_size

Gnulib module: ---

Portability problems fixed by Gnulib:

Portability problems not fixed by Gnulib:

  * This function is missing on some platforms: macOS 11.1, FreeBSD 6.0, NetBSD 9.0, OpenBSD 6.7, Minix 3.1.8, AIX 5.1, HP-UX 11.00, IRIX 6.5, Solaris 11.4, mingw, MSVC 14, Android 4.1.