[MacPorts] #61868: libusb @1.0.24: cannot parse USB.h with mainline gcc versions due to variant pragma handling not accepted by gcc

[MacPorts]

#61868: libusb @1.0.24: cannot parse USB.h with mainline gcc versions due to
variant pragma handling not accepted by gcc
-----------------------------------+-----------------------
  Reporter:  dgonyier              |      Owner:  michaelld
      Type:  defect                |     Status:  reopened
  Priority:  Normal                |  Milestone:
 Component:  ports                 |    Version:  2.6.4
Resolution:                        |   Keywords:
      Port:  libusb, libusb-devel  |
-----------------------------------+-----------------------

Comment (by kencu):

 don't forget then that each different system will need (in cases)
 different patches, and different patches for each different file sometimes
 depending on each different system.

 eg...

 Tiger might need 10 headers to get patches, two new headers that don't
 exist in the SDK, whereas Leopard needs three headers to get three other
 patches, whereas Lion needs one.

 blah blah blah.

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Ticket URL: <https://trac.macports.org/ticket/61868#comment:35>
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