[MacPorts] #44638: doxygen @1.8.7: build fails with old python

[MacPorts]

#44638: doxygen @1.8.7: build fails with old python
---------------------------+---------------------
 Reporter:  ryandesign@…   |      Owner:  css@…
     Type:  defect         |     Status:  new
 Priority:  Normal         |  Milestone:
Component:  ports          |    Version:  2.3.1
 Keywords:  tiger leopard  |       Port:  doxygen
---------------------------+---------------------
 doxygen 1.8.7 fails to build on Leopard:

 {{{
 /usr/bin/python configgen.py -cpp config.xml
 >../generated_src/doxygen/configoptions.cpp
   File "configgen.py", line 563
     except Exception as inst:
                       ^
 SyntaxError: invalid syntax
 }}}

 Leopard's python is old:

 {{{
 $ /usr/bin/python --version
 Python 2.5.1
 }}}

 You may need a build dependency on a newer MacPorts-provided python. I see
 you already do that in the doc variant but I am not using the doc variant.

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Ticket URL: <https://trac.macports.org/ticket/44638>
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