On Fri, Oct 02, 2015 at 10:13:09PM -0400, Mike Frysinger wrote: > Title: GCC 5 Defaults to the New C++11 ABI > Author: Mike Frysinger <[email protected]> > 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'
Exactly what part of this line is the important part? I take it its the @GLIBCXX_3.4.17? or is it the lack of the __cxx11::? I have a feeling that posted like this and users will think anytime it says undefined reference then its a C++ issue which is likely not the case. > 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/ -- Jason
