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In my conditional defines i have defined 'DELPHI'. In my code i. If i change IFNDEF to IFDEF, it compiles. This obviously means that it doesn't know DELPHI. Delphi 64-bit Compiler Preview and XE2 In this article, I'll cover some of the things to watch out for when using the Delphi 64-bit compiler (or when preparing your 32-bit code for the 64-bit world). The diufference between ifndef delphi and ifdef pfc is, as I explained, that the fpc compiler sets FPC by default, whereas delphi does not set something standard, only version specific. LVL Commented: 2008-10-15.
#ifdef and #ifndef Directives (C/C++) • • 2 minutes to read • Contributors • • • • • • In this article The #ifdef and #ifndef directives perform the same task as the #if directive when it is used with defined( identifier ). Syntax #ifdef identifier #ifndef identifier // equivalent to #if defined identifier #if!defined identifier Remarks You can use the #ifdef and #ifndef directives anywhere #if can be used. How to attach file to text on android phone.
Delphi Define Directive
The #ifdef identifier statement is equivalent to #if 1 when identifier has been defined, and it is equivalent to #if 0 when identifier has not been defined or has been undefined with the #undef directive. These directives check only for the presence or absence of identifiers defined with #define, not for identifiers declared in the C or C++ source code. These directives are provided only for compatibility with previous versions of the language. The defined( identifier ) constant expression used with the #if directive is preferred. The #ifndef directive checks for the opposite of the condition checked by #ifdef.
Delphi Compiler Switches
If the identifier has not been defined (or its definition has been removed with #undef), the condition is true (nonzero). Otherwise, the condition is false (0). Microsoft Specific The identifier can be passed from the command line using the /D option.
Up to 30 macros can be specified with /D. This is useful for checking whether a definition exists, because a definition can be passed from the command line. For example: // ifdef_ifndef.CPP // compile with: /Dtest /c #ifndef test #define final #endif END Microsoft Specific See Also Feedback. Download free pc software full version.