[Bug c++/43881] warning attached to a function is emitted even though the function is not being called

[pinskia at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=43881

--- Comment #6 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
The best way to do this is to use asm instead:
extern "C" int close(int);
extern __typeof__ (close) close __attribute__ ((__warning__ ("The symbol close
refers to the system function. Use safe_close instead.")));
extern __typeof__ (close) safe_close asm("close");