Linkers
A linker is a system software tool that combines multiple object files generated by a compiler into a single executable program, library, or another object file. It resolves symbolic references between these files, assigns final memory addresses to code and data sections, and handles relocation to produce a runnable output. Linkers are a critical component in the software build process, especially in compiled languages like C, C++, and Rust.
Developers should learn about linkers when working with compiled languages to understand the build process, debug linking errors (e.g., undefined references or duplicate symbols), and optimize program size and performance. This is essential for systems programming, embedded development, and creating large-scale applications where managing dependencies and memory layout is crucial. Knowledge of linkers helps in tasks like static vs. dynamic linking, creating shared libraries, and cross-compilation.