Hi,

- The only C++ runtime that Apple provides on all systems since 10.5(?)
   is the one delivered with gcc 4.2.1. I really doubt that Apple
   will change that to a recent libc++

You are wrong on this point. Apple have been abandoning gcc in favour of clang/LLVM over the last few OSX releases, and finished this in 10.9 which does *not* have a 'gcc' compiler at all. OSX also does have libc++. In fact, its the only C++ runtime in 10.9.

On OSX Macports explicitly links using the libc++ runtime, where as on older releases it

This is exactly why c++11 code is fine on OSX10.9, as the default compiler libc++ used there supports it, but not on older OSC releases. This is why the c++ issue and OSX versions are mixed up here.

Chris

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