[MacPorts] #64240: graphviz-devel @2.50.0, or port, creates one sym-link too many on macOS High Sierra, version 10.12.6

[MacPorts]

#64240: graphviz-devel @2.50.0, or port, creates one sym-link too many on macOS
High Sierra, version 10.12.6
-----------------------------+------------------------
  Reporter:  ballapete       |      Owner:  (none)
      Type:  defect          |     Status:  new
  Priority:  Normal          |  Milestone:
 Component:  ports           |    Version:  2.7.1
Resolution:                  |   Keywords:  highsierra
      Port:  graphviz-devel  |
-----------------------------+------------------------

Comment (by ballapete):

 On PC Tiger, Mac OS X 10.4.11, I see:

 {{{
 DEBUG: deactivating file: /opt/local/share/man/man1/dotty.1.gz
 DEBUG: deactivating link: /opt/local/share/man/man1/dot2gxl.1
 DEBUG: deactivating file: /opt/local/share/man/man1/dot.1.gz
 }}}

 and then

 {{{
 x ./opt/local/share/man/man1/dot.1.gz
 x ./opt/local/share/man/man1/dot2gxl.1
 x ./opt/local/share/man/man1/dotty.1.gz
 }}}

 followed by

 {{{
 DEBUG: activating file: /opt/local/share/man/man1/dot.1.gz
 DEBUG: activating file: /opt/local/share/man/man1/dot2gxl.1
 DEBUG: activating file: /opt/local/share/man/man1/dotty.1.gz
 }}}

 which results on disk in:

 {{{
 pete 242 /\ l /opt/local/share/man/man1/dot2gxl.1
 lrwxr-xr-x 1 root admin 8 18. Dez 14:54
 /opt/local/share/man/man1/dot2gxl.1 -> gv2gxl.1
 pete 243 /\ l -L /opt/local/share/man/man1/dot2gxl.1
 gls: Zugriff auf '/opt/local/share/man/man1/dot2gxl.1' nicht möglich: No
 such file or directory
 Exit 2
 pete 244 /\ l -L /opt/local/share/man/man1/dot2gxl.1*
 gls: Zugriff auf '/opt/local/share/man/man1/dot2gxl.1' nicht möglich: No
 such file or directory
 Exit 2
 pete 245 /\ l /opt/local/share/man/man1/dot2gxl.1*
 lrwxr-xr-x 1 root admin 8 18. Dez 14:54
 /opt/local/share/man/man1/dot2gxl.1 -> gv2gxl.1
 }}}

 On `High Sierra` a working sym-link and a completely defunct sym-link are
 created while the binary archive for `Tiger` contains only the defunct
 sym-link.

-- 
Ticket URL: <https://trac.macports.org/ticket/64240#comment:1>
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