[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 michaelld):

 true ... but for this specific issue, it's a max of 1 header regardless of
 the OSX / MacOSX / macOS version. It's easy to test for & determine
 whether it is required (via a "grep" of the header for the pragma line),
 and that single line can be patched via a "sed" script (not a patch since
 that's not reliable across versions of that same file I'm pretty sure) ...
 again: I'll give this a go when I get a chance (soon hopefully) to see how
 complicated & reliable it is. yes: blah blah blah ... :)

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Ticket URL: <https://trac.macports.org/ticket/61868#comment:36>
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