https://gcc.gnu.org/bugzilla/show_bug.cgi?id=51333
--- Comment #12 from Jonathan Wakely <redi at gcc dot gnu.org> --- Author: redi Date: Fri Aug 30 15:01:10 2019 New Revision: 275192 URL: https://gcc.gnu.org/viewcvs?rev=275192&root=gcc&view=rev Log: PR libstdc++/51333 Define recursive_init_error constructor non-inline The recursive_init_error class is defined in a header, with an inline constructor, but the definition of the vtable and destructor are not exported from the shared library. With -fkeep-inline-functions the constructor gets emitted in user code, and requires the (non-exported) vtable. This fails to link. As far as I can tell, the recursive_init_error class definition was moved into <cxxabi.h> so it could be documented with Doxygen, not for any technical reason. But now it's there (and documented), somebody could be relying on it, by catching that type and possibly performing derived-to-base conversions to the std::exception base class. So the conservative fix is to leave the class definition in the header but make the constructor non-inline. This still allows the type to be caught and still defines its base class. Backport from mainline 2019-07-29 Jonathan Wakely <jwak...@redhat.com> PR libstdc++/51333 * libsupc++/cxxabi.h (__gnu_cxx::recursive_init_error): Do not define constructor inline. * libsupc++/guard_error.cc (__gnu_cxx::recursive_init_error): Define constructor. * testsuite/18_support/51333.cc: New test. Added: branches/gcc-8-branch/libstdc++-v3/testsuite/18_support/51333.cc Modified: branches/gcc-8-branch/libstdc++-v3/ChangeLog branches/gcc-8-branch/libstdc++-v3/libsupc++/cxxabi.h branches/gcc-8-branch/libstdc++-v3/libsupc++/guard_error.cc
