This option instructs the compiler to suppress all warning
messages.
See also
--brief_diagnostics, --no_brief_diagnostics
--diag_error=tag[,tag,...]
--diag_remark=tag[,tag,... ]
--diag_style={arm|ide|gnu}
--diag_suppress=tag[,tag,...]
--diag_warning=tag[,tag,...]
--errors=filename
--remarks
--wrap_diagnostics, --no_wrap_diagnostics