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by hgs3 1285 days ago
You're basically asking why you'd want object files. They're a container of (usually) relocatable machine code. You can inspect or modify them with nm [1] or objcopy [2]. You can link them with object files generated from other programming languages to mix languages. Maybe you have a custom linker or environment that requires you to convert an ELF or COFF object file to some custom variant. There are lots of reasons.

[1] https://linux.die.net/man/1/nm

[2] https://linux.die.net/man/1/objcopy