3.5.2 Warn Option

The --warn option requests that all warnings be issued by the assembler. This is the default behavior if no option is specified.

The --no-warn form of this option (or its alias -W) suppresses the reporting of any warnings. Errors are still reported, and this option does not affect how your source code is assembled. Use this form of the option with care, as some warning messages indicate code that might fail during execution.