# Linker Optimization Features

> - Plugins
>   : More Information about linker plugins can be found at {doc}`linker_plugins_updated`
>
> - Garbage Collection
>
>   > - Unused function and data sections are garbage collected by linker when we provide **--gc-sections** option at the link time
>   > - Garbage collected sections can be printed by providing **--print-gc-sections** option
>   > - --gc-sections decides which input sections are used by examining symbols and relocations.
>   > - The section containing the entry symbol and all sections containing symbols undefined on the command-line will be kept, as will sections containing symbols referenced by dynamic objects.
>   > - Note that when building shared libraries, the linker must assume that any visible symbol is referenced.
>   > - If the linker performs a partial link (-r linker option), then you will need to provide the entry point using the -e / --entry linker option.