Options for System V#
These additional options are available on System V Release 4 for compatibility with other compilers on those systems:
Identify the versions of each tool used by the compiler, in a
.identassembler directive in the output.
Refrain from adding
.identdirectives to the output file (this is the default).
Look in the directory
dirto find the M4 preprocessor. The assembler uses this option.