Differentiate between a linker and linkage?

Understanding the Difference Between a Linker and Linkage in C Programming

A linker converts an object code into an executable code by linking together the necessary build-in functions. The form and place of declaration where the variable is declared in a program determine the linkage of the variable.

In computer programming, a linker is a program that takes one or more object files generated by a compiler and combines them into a single executable program or library. The linker resolves references between the object files and external libraries to create a single binary file that can be executed by the operating system. It also performs functions such as symbol resolution, relocation, and dead code elimination.

On the other hand, linkage refers to the process of connecting different code modules together to form a single executable program or library. It is the process of combining separately compiled object files into a single executable file. Linkage is achieved by the linker program, which takes care of resolving external references and creating a final executable or library. Linkage can be static or dynamic, depending on whether the external libraries are linked at compile time or runtime.

In summary, a linker is a program that performs the process of linkage, which is the act of combining multiple object files into a single executable or library.

Linker in c programming:

• A linker is a program that links together multiple object files generated during compilation into a single executable program.
• Its main function is to resolve symbols, which are references to functions and variables that are defined in one source file and used in another.
• Linking typically occurs after compiling all source files in a program, and it creates an executable file that can be executed by the operating system.

Linkage in c programming:

• Linkage refers to the way in which different object files or functions are combined to form a single executable program.
• It determines how symbols defined in one source file are accessed by other source files.
• There are three types of linkage in C: external, internal, and none.
• External linkage means that a symbol can be accessed by other source files in the same program.
• Internal linkage means that a symbol can only be accessed by other functions in the same source file.
• No linkage means that a symbol can only be accessed within the scope in which it is defined.

In summary, a linker is a program that links together object files to create an executable, while linkage determines how different object files or functions are combined to form a program.