Discussion
A compiler that supports separate compilation must record in each object file
Answer: C
Correct answer: the symbols it defines and the symbols it leaves unresolved
Separate compilation means the linker must later match one module's references against another's definitions, so each object file carries two lists: the symbols it exports and the external symbols it needs.
Local variable names are not needed for linking, and appear only if debugging information is requested. The optimisations applied and the source text are irrelevant to resolution - the linker works entirely from the symbol tables and the relocation entries.
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