[MacPorts] #63469: gcc @7.5.0_2: Fails to link projects compiled with -fstack-protector-strong

[MacPorts]

#63469: gcc @7.5.0_2: Fails to link projects compiled with -fstack-protector-strong
--------------------------+--------------------
  Reporter:  evanmiller   |      Owner:  (none)
      Type:  defect       |     Status:  new
  Priority:  Normal       |  Milestone:
 Component:  ports        |    Version:  2.7.1
Resolution:               |   Keywords:
      Port:  gcc7 cmocka  |
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Comment (by kencu):

 When you get your link error, and it fails again, please go into the build
 at the exact folder where it happens, and run the link command manually
 with the same exact invocation, but add {{{-Wl,-v}}} to the link command
 line.

 You should get a spew of output, and hopefully something in it might give
 us a clue why the link library pathway to where {{{libssp}}} lives is not
 available to the linker when looking for {{{libssp}}}.

 By default, gcc7 will add the proper path to libssp, as we see above. So
 my guess at the moment is that something must be stopping it (somehow)
 from doing that.

 Exactly what is TBA...

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Ticket URL: <https://trac.macports.org/ticket/63469#comment:17>
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