[MacPorts] #44062: root6: make it work on 10.6

[MacPorts]

#44062: root6: make it work on 10.6
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  Reporter:  mojca@…  |      Owner:  mojca@…
      Type:  defect   |     Status:  closed
  Priority:  Normal   |  Milestone:
 Component:  ports    |    Version:
Resolution:  fixed    |   Keywords:  snowleopard
      Port:  root6    |
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Comment (by jeremyhu@…):

 Replying to [comment:50 jonesc@…]:
 > Replying to [comment:49 mojca@…]:
 > > Doesn't `libc++` have exactly the same problem?

 No, it doesn't

 > To some degree yes, although its not as bad as using libstdc++ from gcc.

 No, it doesn't.  MacPorts uses only /usr/lib/libc++.dylib as the libc++
 runtime.  MacPorts will use both /usr/lib/libstdc++.dylib or
 ${prefix}/lib/libstdc++.dylib as the libstdc++.dylib depending on your
 compiler choice (system compilers use the former, macports-gcc compilers
 the latter).

 > For instance on <OSX10.9 the variants pythia and xrootd do not work,
 they fail to build, as those ports use the default c++ runtime, which on
 the older systems is the system libstdc++. You must understand forcing the
 use of libc++ was only ever a last resort solution, and only works because
 we are lucky enough that the core default port doesn't happen use any
 libraries that use another c++ runtime, otherwise it would not work... If
 a user really wants to be safe, and/or gets these variants to work, they
 need to rebuild their entire MacPorts stack using libc++ as the default
 runtime, with all the untested issues that would likely throw up ...

 All of my systems (Snow Leopard and later) have libc++ as the C++ runtime.
 I haven't run into any issues since the initial fix-fest about a year and
 a half ago.  I doubt we'll continue supporting libstdc++ for much longer
 (I know I certainly won't spend much effort fixing things for libstdc++)

-- 
Ticket URL: <https://trac.macports.org/ticket/44062#comment:51>
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