Do Compilers Eliminate Unused Functions?

Unused Function Elimination in Compilers

Compilers often implement various optimizations to enhance code efficiency. One question that arises is whether they eliminate unused functions from the final executable.

Answer:

The answer to this question varies depending on the compiler. Visual C 9, for instance, exhibits such behavior. It removes static functions that remain unused during the compilation phase. Additionally, functions with external linkage that are not used can be eliminated during the linking phase, subject to specific linker configurations.

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