[MacPorts] #69206: orc @0.4.35_1: fails in build stage on MacBook Pro M2, Sonoma 14.3

[MacPorts]

#69206: orc @0.4.35_1: fails in build stage on MacBook Pro M2, Sonoma 14.3
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  Reporter:  zzanderr  |      Owner:  (none)
      Type:  defect    |     Status:  new
  Priority:  Normal    |  Milestone:
 Component:  ports     |    Version:  2.9.0
Resolution:            |   Keywords:  arm64
      Port:  orc       |
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Comment (by ryandesign):

 Ok indeed 0.4.35_0 build successfully on arm64:
 https://build.macports.org/builders/ports-14_arm64-builder/builds/13528

 But 0.4.35_1 failed on arm64; that was when `-std=c99` was added:
 https://build.macports.org/builders/ports-14_arm64-builder/builds/13904

 If someone on arm64 can check if changing that to `-std=gnu99` works,
 please let us know. If that works, you can submit a PR for that fix.

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Ticket URL: <https://trac.macports.org/ticket/69206#comment:12>
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