8.4.7 Compress DWARF Information (--compress_dwarf Option)

The --compress_dwarf option aggressively reduces the size of DWARF information by eliminating duplicate information from input object files.

For ELF object files, which are used with EABI, the --compress_dwarf option eliminates duplicate information that could not be removed through the use of ELF COMDAT groups. (See the ELF specification for information on COMDAT groups.)