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-W: Flag-setting options for FWEAVE

This is a family of options that set miscellaneous flags appropriate only for FWEAVE. Options such as -W[ and -Wf can be combined as -W[f.

• -W@: Set module warning flag.
• -W1: Completely cross-reference single-character identifiers.
• -W[: Turn on processing of bracketed array indices.
• -WH: Send extra arguments to the C preprocessor.

  Commands that inhibit printing:

• -Wd: Don't print @d or @D in woven output.
• -Wf: Don't print @f.
• -WF: Don't print @F.
• -Wl: Don't print @l.
• -Wm: Don't print @m or @M.
• -Wv: Don't print @v.
• -Ww: Don't print @w or @W.