These are auto generates names and internal names used by the compiler and linker. The main object of them is to make them so that these names do not collide with nice identifiers, variable names, and function names that you use in your program. For the most part as you write C code you would have little need to create names with the ?'s in them.

Sometimes when you make assembler modules that interface to C it may be necessary to use some of the standard ?? type names....but not usually.

Michael Karas