[MacPorts] #71728: xxhashlib 0.8.3 broken on Rosetta

[MacPorts]

#71728: xxhashlib 0.8.3 broken on Rosetta
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  Reporter:  barracuda156  |      Owner:  (none)
      Type:  defect        |     Status:  new
  Priority:  Normal        |  Milestone:
 Component:  ports         |    Version:  2.10.5
Resolution:                |   Keywords:  rosetta, snowleopard
      Port:  xxhashlib     |
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Comment (by ryandesign):

 This problem doesn't seem specific to Rosetta, but could occur in any
 cross-compiling scenario, because `$(CC) -dumpmachine` will tell you the
 machine you are building ''on'' not the machine you are building ''for''.
 To get the latter, the right `-arch` flags would have to be added there,
 e.g. by adding `$(CFLAGS)`.

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Ticket URL: <https://trac.macports.org/ticket/71728#comment:2>
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