This option enables you to ensure Application Binary Interface (ABI) compliance of legacy or third party objects. It checks that branch relocation applies to a branch instruction bit-pattern. The linker generates an error if there is a mismatch.
--strict_relocations to instruct the
linker to report instances of obsolete and deprecated relocations.
Relocation errors and warnings are most likely to occur if you are linking object files built with previous versions of the ARM tools.
armlink User Guide: