[MacPorts] #71162: xar @1.8.0.501_0: error: implicit declaration of function 'xar_prop_get_expect_notnull' is invalid in C99 [-Werror, -Wimplicit-function-declaration]

[MacPorts]

#71162: xar @1.8.0.501_0: error: implicit declaration of function
'xar_prop_get_expect_notnull' is invalid in C99 [-Werror,-Wimplicit-
function-declaration]
-------------------------+------------------------------
  Reporter:  ryandesign  |      Owner:  Schamschula
      Type:  defect      |     Status:  assigned
  Priority:  High        |  Milestone:
 Component:  ports       |    Version:  2.10.2
Resolution:              |   Keywords:  bigsur, monterey
      Port:  xar         |
-------------------------+------------------------------

Comment (by lukaso):

 > On a side note, maybe you could take a look at this when you get a
 chance? #69525 The same problem was confirmed on 10.5.8 ppc.

 I would love to. However, I've had to stop supporting 2.10.38 (time
 constraints) to focus on 3.0, and have also dropped support for MacOS
 below 11. (All related to challenges of cross-compiling dependencies to
 older macs and to intel from arm and resources while being the only
 maintainer for GIMP on the Mac -- with a few people helping out.)

 So we are counting on the kindness of others on this.

-- 
Ticket URL: <https://trac.macports.org/ticket/71162#comment:18>
MacPorts <https://www.macports.org/>
Ports system for macOS