https://gcc.gnu.org/bugzilla/show_bug.cgi?id=105810
--- Comment #10 from cqwrteur <unlvsur at live dot com> --- (In reply to Jonathan Wakely from comment #7) > Right, but that function doesn't even exist today, so there's nothing to > merge today. This change adds new symbols (one for every assertion in the > library) which must be assembled and then merged by the linker. > > I'm just not sure why you're pointing this out in comment 4 like it's an > advantage of the change. Of course there's only one copy of the function, > otherwise it would be an ODR violation, or a linker error. But it's still > one more function for every assertion in the library. I am not saying "merging my code", I am saying the compiler would only emit once. Not merging my code into libstdc++ something like that.