[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):

 Fedora may be right in some respects, but this pragma issue still lives
 on, and has never been fixed in gcc:

 https://gcc.gnu.org/bugzilla/show_bug.cgi?id=50909

 the Darwin build spec happens with the host/target options, and are
 correctly set, and there are no other I know of re: pragmas.

 So - no bueno.

 Re stdatomic.h ... as of a certain version clang turned off their
 (somewhat flawed) atomic support in compiler-rt, and it was broken for
 32bit build targets, but I've been turning it back on gradually.

-- 
Ticket URL: <https://trac.macports.org/ticket/61868#comment:44>
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