https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83437
--- Comment #6 from Jakub Jelinek <jakub at gcc dot gnu.org> --- (In reply to Bernd Edlinger from comment #5) > I think the best solution would be to use "V = void (*)(void);" > > I quote from Joseph Myers e-mail from 10/10/2017 because I could not > express it any better: > > "Sometimes an interface needs to store an arbitrary function type [...] > That's the sort of thing libffi > does - so it inherently needs to be able to take pointers to arbitrary > function types, which thus need to be converted to a generic function > type, and the de facto generic function pointer type in C is void (*) > (void). (C11 6.11.6 says "The use of function declarators with empty > parentheses (not prototype-format parameter type declarators) is an > obsolescent feature.", so void (*) () is best avoided.) Likewise > interfaces such as dlsym (which happens to return void * along with a > special case in POSIX requiring conversions between void * and function > pointers to work, but void (*) (void) is the natural type for such > interfaces to use). For C sure, but we are talking here about C++. void (*) () in C++ is different from void (*) () in C.
