https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68771
--- Comment #12 from Iain Sandoe <iains at gcc dot gnu.org> --- (In reply to Daniel Vollmer from comment #10) > Created attachment 46036 [details] > 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. Thanks, I can reproduce this with my local gcc-7 branch, interesting that it needs both -Ofast and -fprofile-generate to fire.
