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shared library

A library that stays a separate file and is joined to each program that uses it when the program starts, instead of being copied into the program when it is built.

A shared library (.so on Linux, .dylib on macOS, .dll on Windows) is a linked module loaded at run time by the dynamic linker; one copy of the file on disk serves every program that uses it, and its global symbols are its interface.

See also

DLL global symbol loader ELF
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