[MacPorts] #39975: root: Add --enable-cxx11 for some variants

[MacPorts]

#39975: root: Add --enable-cxx11 for some variants
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  Reporter:  jfcaron@…    |      Owner:  mattiafrancescomoro@…
      Type:  enhancement  |     Status:  closed
  Priority:  Normal       |  Milestone:
 Component:  ports        |    Version:  2.2.0
Resolution:  wontfix      |   Keywords:
      Port:  root         |
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Comment (by jfcaron@…):

 I would like to revive this ticket and add to the request that the flag
 not just be for --enable-cxx11, but to make root link against libcxx
 instead of libgcc.  The basic problem is that even if you compile the root
 port using a modern compiler that supports C++11, the libgcc library
 doesn't.  Try using a list initializer in a compiled ROOT macro and it
 doesn't compile.

 Whatever the ultimate solution is, I would like this line of code:

 static const vector<int> v = {1,2,3};

 to compile using ACLiC with root fresh-from-macports without special
 gSystem->SetMakeSharedLib stuff.  Language support for C++11 without
 library support only takes us so far.

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Ticket URL: <https://trac.macports.org/ticket/39975#comment:8>
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