4.2.65.1 ‘-W@’: Set module warning flag.
Fweave can check module names for the possible anomalous conditions of
“never used” or “multiple uses.” These correspond to a module
warning level, as in the following numbered list:
- Never used.
- Multiple uses.
The module warning flag is the bitwise OR of the desired warning
levels; warning messages are printed only when the relevant bits are
turned on. By default, it is 1, so only messages about never-used
modules are printed. The ‘-W@flag’ overrides the default.
For example, to get messages only about multiple uses, say ‘-W@2’;
to get no messages, say ‘-W@0’. One can put such an option into the
.fweb initialization file (see Initialization).
Fweave will always complain about module names that are never defined.