[boost] [config] Should BOOST_NO_CXX11_ALLOCATOR be undefined for libcpp without std=c++11

Subject: [boost] [config] Should BOOST_NO_CXX11_ALLOCATOR be undefined for libcpp without std=c++11
From: Glen Fernandes (glen.fernandes_at_[hidden])
Date: 2014-05-07 22:17:46

I observed the absence of BOOST_NO_CXX11_ALLOCATOR with clang and
libc++ without -std=c++11. Is this intended?

Right now BOOST_NO_CXX11_ALLOCATOR's absence is (in my view) an
indication of whether C++11 allocators, including class template
std::allocator_traits, are supported - and without -std=c++11 neither
could be.

Glen