[RTEMS Project] #4503: Add glibc malloc family extension malloc_usable_size()

[RTEMS trac]

#4503: Add glibc malloc family extension malloc_usable_size()
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  Reporter:  Joel Sherrill  |      Owner:  (none)
      Type:  enhancement    |     Status:  new
  Priority:  normal         |  Milestone:  6.1
 Component:  lib            |    Version:  6
  Severity:  normal         |   Keywords:  small, tasks, SoC, libc
Blocked By:                 |   Blocking:
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 The man page for this method is at:

 https://man7.org/linux/man-pages/man3/malloc_usable_size.3.html

 Add implementation and test code to the malloc family in libcsupport/. The
 required functionality should be in the underlying score/ capability used.

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Ticket URL: <http://devel.rtems.org/ticket/4503>
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