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The Go linker combines separate object files from compiled packages into a single executable. It resolves cross-package symbol references, assigns memory addresses to all code and data, patches placeholder addresses with actual locations, eliminates unused code through reachability analysis, and organizes everything into OS-specific executable formats (ELF, Mach-O, PE). The process includes building a global symbol index, performing dead code elimination starting from main.main, laying out sections (.text, .rodata, .data, .bss) into segments with appropriate permissions, and generating the final binary with runtime startup code as the entry point.

Internals for Interns

A place for Go developers. This squad features articles, tutorials, guides, and tools written about and in Go.