I am trying to use the ObjectiveC runtime function
class_getName which, according to the developer documentation,
"The functions are implemented in the shared library found at /usr/lib/libobjc.A.dylib
. This shared library provides support for the dynamic properties of the Objective-C language, and as such is linked to by all Objective-C applications."
Yet I get the warning that my use of class_getName is an "implicit definition" of it.