[MacPorts] #52705: libpng: configure fails with "C compiler cannot create executables"

[MacPorts]

#52705: libpng: configure fails with "C compiler cannot create executables"
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  Reporter:  DGDanforth  |      Owner:  ryandesign
      Type:  defect      |     Status:  assigned
  Priority:  Normal      |  Milestone:
 Component:  ports       |    Version:  2.3.4
Resolution:              |   Keywords:
      Port:  libpng      |
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Comment (by ken-cunningham-webuse):

 the first error is
 {{{
 ld: library not found for -lgcc
 }}}
 and that is kind of ominous. That is a basic library for all software to
 build. Something very odd has gone on, it would appear.

 Can you install any software at all?

 If nothing installs, I would first consider reinstalling Xcode and the
 command line tools.
 And after that, I'd give a very serious look at
 [wiki:LibcxxOnOlderSystems] before I went another step, as a lot of
 software you'll want to consider installing on this machine now and in the
 future will need that.

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Ticket URL: <https://trac.macports.org/ticket/52705#comment:5>
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