lld is a new set of modular code for creating linker tools.

lld is a new generation of linker. It is not “section” based like traditional linkers which mostly just interlace sections from multiple object files into the output file. Instead, lld is based on “Atoms”. Traditional section based linking work well for simple linking, but their model makes advanced linking features difficult to implement. Features like dead code stripping, reordering functions for locality, and C++ coalescing require the linker to work at a finer grain.