What is a Linker in Computer Science?
In computer science, a linker is a program that takes an object file and combines it with other object files and libraries to produce a executable file. The linker's primary function is to resolve symbolic references (such as function calls and variable accesses) in the object files to their corresponding definitions, which may be located in other object files or libraries.
The linker also performs other tasks such as:
* Eliminating duplicate code and data
* Optimizing the layout of the executable file
* Providing a map of the memory addresses used by the program
Linker is an essential tool in the development of software applications, as it allows developers to create modular programs that can be easily maintained and updated.
There are different types of linkers, including:
* Dynamic linker: This type of linker creates an executable file that can be loaded into memory at runtime, allowing for dynamic loading and unloading of modules.
* Static linker: This type of linker creates a fixed executable file that cannot be modified or extended at runtime.
* Shared linker: This type of linker creates an executable file that contains shared libraries, which can be used by multiple programs.
In summary, the linker is a crucial tool in software development that allows developers to create modular and maintainable applications by resolving symbolic references and optimizing the layout of the executable file.
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