[MacPorts] #65055: Broken symbolic link libgcc_ext.10.5.dylib and libgcc_ext.10.4.dylib

[MacPorts]

#65055: Broken symbolic link libgcc_ext.10.5.dylib and libgcc_ext.10.4.dylib
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  Reporter:  Serge3leo                              |      Owner:  (none)
      Type:  defect                                 |     Status:  new
  Priority:  Normal                                 |  Milestone:
 Component:  ports                                  |    Version:  2.7.2
Resolution:                                         |   Keywords:
      Port:  libgcc, gcc6, gcc7, gcc8, gcc9, gcc10  |
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Comment (by Serge3leo):

 Replying to [comment:15 kencu]:
 > how about you reinstall gcc9 and we will find out?

 In my original report:
 1. Clean macOS & Xcode;
 2. Clean MacPorts;
 3. sudo port install gcc9

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Ticket URL: <https://trac.macports.org/ticket/65055#comment:18>
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