[RTEMS Project] #3882: Add POSIX user environment pointer to TCB

[RTEMS trac]

#3882: Add POSIX user environment pointer to TCB
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  Reporter:  Sebastian Huber  |      Owner:  Sebastian Huber
      Type:  enhancement      |     Status:  assigned
  Priority:  normal           |  Milestone:  5.1
 Component:  posix            |    Version:  5
  Severity:  normal           |   Keywords:
Blocked By:                   |   Blocking:
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 The IO library uses a POSIX key to store an optional POSIX user
 environment pointer.  This pulls in the POSIX keys support in every
 application configuration.  Add a user environment pointer to the thread
 control block (TCB) instead.  Applications which do not need the POSIX
 user environment will just get an overhead of one pointer per thread.

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Ticket URL: <http://devel.rtems.org/ticket/3882>
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