Do Compilers Remove Unused Functions? A Deep Dive into Optimization Techniques.

Do Unused Functions Impact Code Optimization?

With advancements in compiler technology, significant optimizations are now possible. A common question arises: do compilers remove unused functions from the final code?

Answer:

The optimization process employed by compilers varies depending on the specific compiler. In the case of Visual C 9, unused static functions are eliminated during compilation, triggering a C4505 warning. Additionally, unused functions with external linkage may be removed during the linking phase based on specific linker settings.

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