[RTEMS Project] #4662: Fix GCC 12 warnings

[RTEMS trac]

#4662: Fix GCC 12 warnings
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 Reporter:  Chris Johns  |       Owner:  (none)
     Type:  defect       |      Status:  new
 Priority:  normal       |   Milestone:  6.1
Component:  tool/gcc     |     Version:  6
 Severity:  blocker      |  Resolution:
 Keywords:               |  Blocked By:
 Blocking:               |
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Comment (by Chris Johns <chrisj@…>):

 In [changeset:"0cf0914efef17832ac963cc144f7288845d9b883/rtems"
 0cf0914/rtems]:
 {{{
 #!CommitTicketReference repository="rtems"
 revision="0cf0914efef17832ac963cc144f7288845d9b883"
 cpukit: Change _COMPILING_NEWLIB to _LIBC for helper functions decls

 Updates #4662
 }}}

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Ticket URL: <http://devel.rtems.org/ticket/4662#comment:3>
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