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9899 cw(1onbld) should shadow more compilation
9888 cw shouldn't use __unused

*** 62,74 **** SHADOW COMPILATION If --shadow compilers are specified cw will invoke each shadow compiler, with the outputs modified (as well as any translation for compiler style) as follows: ! 1. If neither of -c, -S appears in the argument list (that is, linking ! is attempted or only the pre-processor is invoked), the shadow ! compilers will not be invoked. 2. If the -o filename option was provided, with or without a separating space, it will be replaced with -o tempfile 3. If the option -o was not provided, -o tempfile will be added to the --- 62,73 ---- SHADOW COMPILATION If --shadow compilers are specified cw will invoke each shadow compiler, with the outputs modified (as well as any translation for compiler style) as follows: ! 1. If cw is invoked to link-edit without compilation (the input files ! are all objects), the shadow compiler is not invoked. 2. If the -o filename option was provided, with or without a separating space, it will be replaced with -o tempfile 3. If the option -o was not provided, -o tempfile will be added to the