[gentoo-dev] gcc-5 news item wrt C++ ABI

[Mike Frysinger]

Title: GCC 5 Defaults to the New C++11 ABI 
Author: Mike Frysinger <vapier@g.o>
Content-Type: text/plain
Posted: 2015-10-02
Revision: 1
News-Item-Format: 1.0
Display-If-Installed: >=sys-devel/gcc-5

GCC 5 uses the new C++ ABI by default.  When building new code, you might run
into link time errors like:
...: undefined reference to '_ZNSt6chrono12steady_clock3nowEv@GLIBCXX_3.4.17'
Or you might see linkage failures with "std::__cxx11::string" in the output.

These are signs that you need to rebuild packages using the new C++ ABI.
You can quickly do so by using revdep-rebuild like so:
# revdep-rebuild --library 'libstdc\+\+\.so\.6'

For more details, feel free to peruse:
https://developerblog.redhat.com/2015/02/05/gcc5-and-the-c11-abi/
https://blogs.gentoo.org/blueness/2015/03/10/the-c11-abi-incompatibility-problem-in-gentoo/