https://gcc.gnu.org/bugzilla/show_bug.cgi?id=58909
--- Comment #17 from Jonathan Wakely <redi at gcc dot gnu.org> --- (In reply to Jakub Jelinek from comment #16) > Are those weak refs from libstdc++.a objects or from the user *.o files? >From libstdc++.a > If the former, perhaps we could declare some libstdc++ APIs (related to > threading) as requiring linking of -lpthread and made them non-weak in > libstdc++.a. Yes, I think we should just use the non-weak pthread_xxx symbols directly when !defined(_GLIBCXX_SHARED) and rely on those sections from libstdc++.a not being used unless they're needed. > I don't really see how can one reproduce this on Fedora/RHEL/CentOS where > libpthread.a > contains a single libpthread.o and therefore it is either you link no thread > support at all, or link it completely. The example in comment 0 fails on Fedora. Nothing in libstdc++.a causes anything from libpthread.o to be used.
