[MacPorts] #68490: libomp @17.0.3: needs compiler with atomic support

[MacPorts]

#68490: libomp @17.0.3: needs compiler with atomic support
---------------------+-----------------------------------------
  Reporter:  RobK88  |      Owner:  eborisch
      Type:  defect  |     Status:  assigned
  Priority:  Normal  |  Milestone:
 Component:  ports   |    Version:  2.8.1
Resolution:          |   Keywords:  lion mountainlion mavericks
      Port:  libomp  |
---------------------+-----------------------------------------

Comment (by cjones051073):

 Replying to [comment:6 rmottola]:
 > Happens on 10.11 El Capitan too.
 >
 > I tried using gcc12 I have installed, but fail:
 >
 >
 > {{{
 > --->  Computing dependencies for libomp...
 > Error: Cannot install libgcc13 for the archs 'i386 x86_64' because
 > Error: its dependency libmpc cannot build for the required archs.
 > }}}
 >
 > I suppose this is not a libomp issue, but a libgcc13 issue now?
 >
 > clang 6.0 worked. Is that already a dependency issue?
 > system clang is 8.0 here... so somehow strange.

 No, this is not an issue with gcc13. The problem is with libomp, and
 started with 17.0.2. 17.0.1 for whatever reason was fine.

 https://ports.macports.org/port/libomp/details/

 It affects OSX 10.11 and older.

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Ticket URL: <https://trac.macports.org/ticket/68490#comment:10>
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