[MacPorts] #56922: Libgcc7 @7.3.0_1 fails to build on PPC Tiger, Mac OS X 10.4.11, because comparison of stages 2 and 3 fails

[MacPorts]

#56922: Libgcc7 @7.3.0_1 fails to build on PPC Tiger, Mac OS X 10.4.11, because
comparison of stages 2 and 3 fails
------------------------+--------------------
  Reporter:  ballapete  |      Owner:  (none)
      Type:  defect     |     Status:  new
  Priority:  Normal     |  Milestone:
 Component:  ports      |    Version:  2.5.3
Resolution:             |   Keywords:  tiger
      Port:  libgcc7    |
------------------------+--------------------

Comment (by cjones051073):

 libgcc7 is only a few weeks old. It did not exist prior to the GitHub PR
 above.

 I see above you have

 {{{
  libgcc @7.3.0_1 (active) platform='darwin 8' archs='ppc'
 date='2018-05-21T14:39:32+0200'
 }}}

 installed. This is, as far as the gcc build goes, identical to libgcc7. So
 it makes no sense one works and the other does not. One possibility is the
 issue is nothing to do with the gcc ports per se, but due to other changes
 made recently in ports like ld64 and cctools, which gcc uses. You are
 seeing this now simply because the new gcc ports are forcing you to
 rebuild with them.

 Anyway, I have no way to test anything as old as 10.4 (I also consider it
 a bit below the support radar myself to be frank). So you are likely going
 to have to investigate this yourself I am afraid.

-- 
Ticket URL: <https://trac.macports.org/ticket/56922#comment:4>
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