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3.14.17: 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 .ident assembler directive in the output.
Refrain from adding .ident directives to the output file (this is the default).
Search the directories dirs, and no others, for libraries specified with `-l'.
Look in the directory dir to find the M4 preprocessor. The assembler uses this option.