https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68771
--- Comment #10 from Daniel Vollmer <zerolo at gmail dot com> --- Created attachment 46036 --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=46036&action=edit Example triggering "This was likely caused by different translation units being compiled with different visibility settings." Generates (w/ g++-7.4 on Darwin) ld: warning: direct access in function '__GLOBAL__sub_I_65535_0_test.cpp' from file '/var/folders/02/yl3m8d4d0397mk6dxn6dpcqw0000gp/T//ccuYv6qu.ltrans0.ltrans.o' to global weak symbol '__ZGVZ19BroadcastFromMasterImEvPT_mE4bufs' from file '/var/folders/02/yl3m8d4d0397mk6dxn6dpcqw0000gp/T//ccuYv6qu.ltrans0.ltrans.o' means the weak symbol cannot be overridden at runtime. This was likely caused by different translation units being compiled with different visibility settings.
