[MacPorts] #70326: gcc13, gcc14 build failures on arm64

[MacPorts]

#70326: gcc13, gcc14 build failures on arm64
---------------------------+---------------------------
  Reporter:  barracuda156  |      Owner:  (none)
      Type:  defect        |     Status:  new
  Priority:  Normal        |  Milestone:
 Component:  ports         |    Version:  2.9.3
Resolution:                |   Keywords:  arm64, sonoma
      Port:  gcc13 gcc14   |
---------------------------+---------------------------

Comment (by ryandesign):

 Per comment:ticket:66250:5:

 > It seems to me Xcode 15 brought changes that are causing this. With the
 libunwind port installed, building against libc++ the linker hooks up any
 binary to MacPorts' dylib making opportunistic linking for basically all
 C++ based ports.

 So you would declare the build conflict against both libunwind and
 libunwind-headers. But since the problem affects all C++-using ports, it
 is probably silly to add that to all C++-using ports. Instead, the
 libunwind port should be fixed per comment:ticket:66250:1.

-- 
Ticket URL: <https://trac.macports.org/ticket/70326#comment:16>
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