Originally posted by carewolf
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Although the changes were made for C++11 conformance, the choice of ABI to use is independent of the -std option used to compile your code, i.e. for a given GCC build the default value of the _GLIBCXX_USE_CXX11_ABI macro is the same for all dialects. This ensures that the -std does not change the ABI, so that it is straightforward to link C++03 and C++11 code together.
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