Adds the specified functions to the list of functions that could be called through the specified function pointer.
LockLint manages to gather a good deal of information about function pointer targets on its own by watching initialization and assignments. For example, for the code
struct foo { int (*fp)(); } foo1 = { bar };
LockLint does the equivalent of the command
% lock_lint declare foo::fp targets bar
LockLint does not yet do the following (for the above example):
% lock_lint declare foo1.fp targets bar