[MacPorts] #65286: graphviz @2.50.0+universal: malloc: *** error for object 0x10201f2c8: Non-aligned pointer being freed

[MacPorts]

#65286: graphviz @2.50.0+universal: malloc: *** error for object 0x10201f2c8: Non-
aligned pointer being freed
---------------------------+-------------------------------------
  Reporter:  barracuda156  |      Owner:  mascguy
      Type:  defect        |     Status:  assigned
  Priority:  Normal        |  Milestone:
 Component:  ports         |    Version:  2.7.2
Resolution:                |   Keywords:  powerpc, leopard, ppc64
      Port:  graphviz      |
---------------------------+-------------------------------------

Comment (by kencu):

 Sergey, what you bring to the table is great enthusiasm and willingness to
 put time in. Iain brings great expertise but little time available. I
 bring neither, but perhaps might fall in between. There are others
 interested too, as you have seen.

 The first thing for you to do is understand exactly what is needed. Using
 apple-gcc42 from MacPorts, built it universal as ppc/ppc64 and use it to
 built simple universal software (eg a simple hello.c executable). See and
 understand what driverdriver.c does to make this work. It is actually
 quite straitforward. Read the driverdriver.c code until you understand
 what parts are in it, and what each part does.

 Then choose one single newer gcc version to work on. I would say gcc7
 perhaps as that is what macports uses now. There is already a ticket where
 a very smart person has worked on updating driverdriver.c for newer gcc
 versions here

 https://trac.macports.org/ticket/48857

 and see here for how to build and use it (only the driverdriver.c part is
 needed for now)

 https://github.com/devernay/macportsGCCfixup

 that file needs some updating to work with gcc7. Once you are to that
 point, people will probably contribute small fixes if the effort gets
 stuck.

 Fred got this far, but then got bogged down in politics, you might say. I
 have a feeling you might blast through that.

 Once gcc7 works, then update it to work with gcc11.

-- 
Ticket URL: <https://trac.macports.org/ticket/65286#comment:9>
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