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ARM Compiler armlink User Guide : Symbol versioning for BPABI models

Symbol versioning for BPABI models

Symbol versioning provides a way to tightly control the interface of a shared library.

When a symbol is imported from a shared library that has versioned symbols, armlink binds to the most recent (default) version of the symbol. At load or run-time when the platform OS resolves the symbol version, it always resolves to the version selected by armlink, even if there is a more recent version available. This process is automatic.

When a symbol is exported from an executable or a shared library, it can be given a version. armlink supports explicit symbol versioning where you use a script to precisely define the versions.

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