[Bug libobjc/89586] warning: cast between incompatible function types when building libobjc

[bernd.edlinger at hotmail dot de]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89586

--- Comment #4 from Bernd Edlinger <bernd.edlinger at hotmail dot de> ---
as long as IMP is not used to call the function
you could try to define IMP as "void (*)(void)",
that would reliably suppress the warning.