On Wed, Oct 7, 2015 at 12:12 AM, David Stacey wrote: > > On 06/10/15 18:51, Ken Brown wrote:
(snip) >> >> >> What about the following scenario: Package P links against library L. >> Library L is rebuilt to use the new ABI. Isn't it possible that package P >> will then have to be rebuilt as well? > > > My understanding is that if 'L' is built with -D_GLIBCXX_USE_CXX11_ABI=0 then > P wouldn't need to be rebuilt (I haven't tested that, though). However, this > compiler switch loses some C++11 features of the STL, so it isn't a magic > cure. > If you use -D_GLIBCXX_USE_CXX11_ABI=0, you're stuck with the COW (the old std::string implementation in libstdc++ which uses copy-on-write; this is not standard-conforming anymore). std::list::size() remains O(n) instead of the newly mandated O(1). AFAIK, that's it. Csaba -- GCS a+ e++ d- C++ ULS$ L+$ !E- W++ P+++$ w++$ tv+ b++ DI D++ 5++ The Tao of math: The numbers you can count are not the real numbers. Life is complex, with real and imaginary parts. "Ok, it boots. Which means it must be bug-free and perfect. " -- Linus Torvalds "People disagree with me. I just ignore them." -- Linus Torvalds -- Problem reports: http://cygwin.com/problems.html FAQ: http://cygwin.com/faq/ Documentation: http://cygwin.com/docs.html Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple
