Compiler Option: -w

Set minimum warning level.

Syntax
   -w level | all | none | param | Escape | pedantic | Next | funcptr | 
   constness | suffix | Error | upcast

Parameters
   level
      Warning messages only with a level equal or greater to this value 
      will be output.  
   all
      Equivalent to specifying a level of zero (0).
   none
      Suppresses all warnings.
   param
      Warn when procedure parameters aren't specified with either ByVal or 
      ByRef.
   Escape
      Warn when string literals contain any number of escape characters (\
      ).
   pedantic
      Equivalent to specifying the param and Escape arguments, plus length 
      checking of parameters passed ByVal and of any CPtr converting to 
      pointer only, plus warning on useless suffixes in '-lang fb'.
   Next
      Warn when Next is followed by an identifier.
   funcptr
      Warn on mismatched procedure pointers, including conversions in Cast 
      and CPtr expressions.  Implies '-w all'. Experimental.  Behaviour may 
      change in future versions.
   constness
      Warn when Const (Qualifier) is discarded in an assignment. Implies 
      '-w funcptr' and '-w all'.  Behaviour may change in future versions.
   suffix
      Warn on useless suffixes in '-lang fb'.
   Error
      Report warnings as errors.  Warnings cause the error count to 
      increase, warning messages are displayed as "error warning...", 
      compilation / assembly / linking aborts, and fbc exits with an error 
      code.
   upcast
      Warn when up-casting discards initializers.

Description
   The -w compiler option determines which compiler warnings, if any, are 
   output. Each possible warning is associated with a warning level, 
   starting from zero (0) and increasing with the potential problems that 
   may occur.

   The param, Escape, pedantic, Next, funcptr, constness, suffix, Error, 
   and upcast arguments provide additional warnings not ordinarily output, 
   even by default.

   The default, if the -w option is not specified, is as if -w 1 was used. 
   The -w option can be specified multiple times.  Warning messages having 
   a level of 0 are not shown by default.

   -w none, or a significantly high level value will have the effect of 
   suppressing all warning messages.

   fbc does not issue warning or error if the warning name itself is not 
   valid.  For example -w flarg, is not a recognized name for a warning.  
   The compiler silently ignores this to allow command lines with warnings 
   added in new versions of fbc to also be used with older versions of fbc 
   without complaint.

Version
   * Since fbc 1.10.0: '-w upcast' option
   * Since fbc 1.09.0: '-w error' option.
   * Before fbc 1.08.0, default warning level was 0 and some warnings had 
     level of -1.

See also
   * Using the Command Line

