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 KeyPgByvalByVal or 
		KeyPgByref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 KeyPgByvalByVal and of any KeyPgCptrCPtr converting to 
		pointer only, plus warning on useless suffixes in '-lang fb'.
	Next
		Warn when KeyPgNextNext is followed by an identifier.
	funcptr
		Warn on mismatched procedure pointers, including conversions in KeyPgCastCast 
		and KeyPgCptrCPtr expressions.  Implies '-w all'. Experimental.  Behaviour may 
		change in future versions.
	constness
		Warn when KeyPgConstQualifier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
	* CompilerCmdLineUsing the Command Line

