GNU Linker
The GNU Linker (ld) is a command-line tool that combines object files and libraries into a single executable or shared library, resolving symbol references and performing memory layout. It is a core component of the GNU toolchain, used primarily in C, C++, and other compiled languages to produce final binary outputs from compiled code. The linker handles tasks like address assignment, relocation, and symbol table generation, essential for creating runnable programs.
Developers should learn and use the GNU Linker when working with compiled languages like C or C++ on Unix-like systems, especially in embedded systems, operating system development, or performance-critical applications where fine-grained control over binary layout is needed. It is crucial for linking multiple object files, managing static and dynamic libraries, and optimizing executable size or memory usage, such as in bootloaders or low-level software.