http://gcc.gnu.org/bugzilla/show_bug.cgi?id=60235
--- Comment #4 from Jan Hubicka <hubicka at gcc dot gnu.org> --- Even at -O3 we inline only functions that either can not be interposed (i.e. static or -fno-pic) or are known to be same everywhere (comdat and functions declared inlined). I was considering command line option -fno-semantic-interposition to control this. Perhaps it is a good idea. In C++ context I am not really that convinced interposition makes much sense though. In real life, 99.9% symbols will never be interposed by a symbol with different semantic and I would say that all of them will be C symbols (malloc). Given that ELF decided to allow interposition to everything by default, we need to play safe. I tried to discuss in http://gcc.gnu.org/ml/gcc-patches/2013-08/msg01509.html the consequences of One Definition Rule that IMO prevents two different implementations of one template coexist in one program. But I lost the case and the conclusion was that if you fully interpose out one instantiation by another, OND rule works.
