[MacPorts] #71474: Build failure on macOS 15 (wrong `CMAKE_OSX_SYSROOT`)

[MacPorts]

#71474: Build failure on macOS 15 (wrong `CMAKE_OSX_SYSROOT`)
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  Reporter:  emmyoh  |      Owner:  (none)
      Type:  defect  |     Status:  new
  Priority:  Normal  |  Milestone:
 Component:  ports   |    Version:
Resolution:          |   Keywords:
      Port:  soxr    |
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Changes (by emmyoh):

 * Attachment "main.log" added.

 Build error for `soxr` on macOS 15

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Ticket URL: <https://trac.macports.org/ticket/71474>
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