Generates a text file that describes the contents of the linker's output file.
-map [keyword[,...]]
The options for the keyword are:
closure
Displays the symbol closures.
unused
Displays the unused symbols.
If multiple symbol =.; directives exist for the same symbol in the linker command file, the symbol appears multiple times in the map file. The last entry of a symbol in the map file always has the actual symbol address.
This is a linker option.