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 Unit   Compiler Directive   Summary
 
    $A   Determines whether data is aligned or packed
    $Align   Determines whether data is aligned or packed
    $AppType   Determines the application type : GUI or Console
    $B   Whether to short cut and and or operations
    $BoolEval   Whether to short cut and and or operations
    $D   Determines whether application debug information is built
    $DebugInfo   Determines whether application debug information is built
    $Define   Defines a compiler directive symbol - as used by IfDef
    $DefinitionInfo   Determines whether application symbol information is built
    $Else   Starts the alternate section of an IfDef or IfNDef
    $EndIf   Terminates conditional code compilation
    $ExtendedSyntax   Controls some Pascal extension handling
    $H   Treat string types as AnsiString or ShortString
    $Hints   Determines whether Delphi shows compilation hints
    $I   Allows code in an include file to be incorporated into a Unit
    $IfDef   Executes code if a conditional symbol has been defined
    $IfNDef   Executes code if a conditional symbol has not been defined
    $IfOpt   Tests for the state of a Compiler directive
    $Include   Allows code in an include file to be incorporated into a Unit
    $IOChecks   When on, an IO operation error throws an exception
    $L   Determines what application debug information is built
    $LocalSymbols   Determines what application debug information is built
    $LongStrings   Treat string types as AnsiString or ShortString
    $MinEnumSize   Sets the minimum storage used to hold enumerated types
    $O   Determines whether Delphi optimises code when compiling
    $Optimization   Determines whether Delphi optimises code when compiling
    $OverFlowChecks   Determines whether Delphi checks integer and enum bounds
    $Q   Determines whether Delphi checks integer and enum bounds
    $R   Determines whether Delphi checks array bounds
    $RangeChecks   Determines whether Delphi checks array bounds
    $ReferenceInfo   Determines whether symbol reference information is built
    $Resource   Defines a resource file to be included in the application linking
    $UnDef   Undefines a compiler directive symbol - as used by IfDef
    $Warnings   Determines whether Delphi shows compilation warnings
    $X   Controls some Pascal extension handling
    $Y   Determines whether application symbol information is built
    $Z   Sets the minimum storage used to hold enumerated types
 
 
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