[MacPorts] #39910: Request for bison2 port due to backwards-incompatible changes in Bison 3.0

[MacPorts]

#39910: Request for bison2 port due to backwards-incompatible changes in Bison 3.0
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  Reporter:  egall@…  |      Owner:  mww@…
      Type:  request  |     Status:  new
  Priority:  Normal   |  Milestone:
 Component:  ports    |    Version:
Resolution:           |   Keywords:
      Port:  bison2   |
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Comment (by egall@…):

 OK, I added portfiles for 3 different versions of bison that install in
 parallel. We'll probably want to add unversioned symlinks to the
 executables for the port of the version that we want to support.

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Ticket URL: <https://trac.macports.org/ticket/39910#comment:17>
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