[MacPorts] #68974: gnupg2 @2.4.3.1 build fails with libusb error

[MacPorts]

#68974: gnupg2 @2.4.3.1 build fails with libusb error
-------------------------+--------------------
 Reporter:  aarongeller  |      Owner:  (none)
     Type:  defect       |     Status:  new
 Priority:  Normal       |  Milestone:
Component:  ports        |    Version:  2.8.1
 Keywords:               |       Port:  gnupg2
-------------------------+--------------------
 The first error in the logfile is:

 {{{
 ccid-driver.c:1155:54: error: implicit declaration of function
 'libusb_error_name' is invalid in C99
 }}}

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Ticket URL: <https://trac.macports.org/ticket/68974>
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