On 10/3/15 4:13 AM, Mike Frysinger wrote: > Title: GCC 5 Defaults to the New C++11 ABI > Author: Mike Frysinger <vap...@gentoo.org> > 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/
Curious, can one reasonably easy downgrade from GCC 5 back to GCC 4? Are there any instructions for that? Is it sufficient to do a similar revdep-rebuild command? In case the downgrade would horribly break systems or be otherwise highly nontrivial, I'd recommend some note for that. Paweł
signature.asc
Description: OpenPGP digital signature
