[MacPorts] #39975: root: Add --enable-cxx11 when using libc++

[MacPorts]

#39975: root: Add --enable-cxx11 when using libc++
--------------------------+------------------------
  Reporter:  jfcaron@…    |      Owner:  jeremyhu@…
      Type:  enhancement  |     Status:  assigned
  Priority:  Normal       |  Milestone:
 Component:  ports        |    Version:  2.2.0
Resolution:               |   Keywords:
      Port:  root         |
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Comment (by jeremyhu@…):

 Yeah, that's because it won't be enabled on your configuration.  You'd
 need to install base trunk, choose libc++ as your C++ runtime, and
 reinstall all of your ports.

 I suggest you set this in /opt/local/etc/macports/macports.conf :
 {{{
 buildfromsource         always
 delete_la_files    yes
 cxx_stdlib libc++
 }}}

 delete_la_files is there because this is a good opportunity for you to do
 that as well (it would require a full reinstall just like switching the
 C++ runtime)

 Note that Lion's libc++ is a bit older and you may run into issues that
 have been fixed in Mountain Lion and Mavericks that weren't pulled back
 into Lion software updates.

-- 
Ticket URL: <https://trac.macports.org/ticket/39975#comment:19>
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