Linker Command in Searching Library Files

The 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 file. The linker performs various tasks, such as resolving external symbols, relocating code and data, and searching library files to find the routine calls.

The command that takes the object file and searches library files to find the routine calls is the linker command. The linker command is responsible for linking all the object files generated by the compiler and ensuring that all the symbols are resolved correctly.

The linker command searches library files for routine calls by following these steps:

1. It reads the object file generated by the compiler and identifies the external symbols used in the program.

2. It searches the library files specified in the command line arguments for the definitions of these external symbols.

3. If it finds a definition for an external symbol in one of the library files, it adds the corresponding object file from the library to the final executable program.

4. If it cannot find a definition for an external symbol in any of the library files, it generates an error and terminates the linking process.

In summary, the linker command is responsible for linking all the object files generated by the compiler and searching library files to find the routine calls. It is an essential tool in the software development process and ensures that the final executable program or library file is generated correctly.