[MacPorts] #61842: opendx @4.4.4_10: y.tab.c:1107:16: error: implicit declaration of function '_dxfcclex' is invalid in C99 [-Werror, -Wimplicit-function-declaration]

[MacPorts]

#61842: opendx @4.4.4_10: y.tab.c:1107:16: error: implicit declaration of function
'_dxfcclex' is invalid in C99 [-Werror,-Wimplicit-function-declaration]
----------------------+-----------------------------
  Reporter:  abitees  |      Owner:  (none)
      Type:  defect   |     Status:  new
  Priority:  Normal   |  Milestone:
 Component:  ports    |    Version:  2.6.4
Resolution:           |   Keywords:  catalina bigsur
      Port:  opendx   |
----------------------+-----------------------------

Comment (by ryandesign):

 But #61032 was about udunits2 and they are still being maintained. Their
 bug report about this issue is
 https://github.com/Unidata/UDUNITS-2/issues/97. If they work out the right
 solution, we can apply the same solution here to opendx.

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Ticket URL: <https://trac.macports.org/ticket/61842#comment:7>
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