Compiler directive - what does it mean?

[Nicole]

This seems to have written some tool into my source

Code: Text  [Select][+][-]

1. {$IFnDEF FPC}
2.   {$R *.lfm}
3. {$ELSE}
4.   {$R *.lfm}
5. {$ENDIF}  

What may happen, if I delete them?
I suppose, my form may be gone? What will happen, if I delete just one part and - which one?

Thanks

[Paolo]

it shloud be something like

Code: Pascal  [Select][+][-]

1. {$IFnDEF FPC}
2.   {$R *.dfm}  //<---- dfm
3. {$ELSE}
4.   {$R *.lfm}
5. {$ENDIF}
6.  

otherwise it is a no sense... This code is tipically come from Delphi transltation to FPC

[KodeZwerg]

Fully correct, the way your original code is shown it makes absolute no sense, do it like Paole wrote and you still can open it in Delphi.

[Nicole]

thank you for your replies.

What do they mean for me?
What may I do with those items?
May I delete all of them or just one?

[KodeZwerg]

When you not need it for Delphi ->

Code: Pascal  [Select][+][-]

1.   {$R *.lfm}

Thats all you need.

[wp]

{$IFDEF FPC} means: "if the symbol "FPC" is defined" then use the following text until the {$ELSE} or {$ENDIF. The text between {$ELSE} and {$ENDIF} is ignored when FPC is defined. In Delphi, for example, the define FPC does not exist, and Delphi ignores the part between {$IFDEF FPC} and {$ELSE} and uses the part between {$ELSE} and {$ENDIF}. This way you can use the same unit in FPC and Delphi.

{$IFNDEF FPC} has the same meaning, but with inverted logic: "if the symbol "FPC" is NOT defined"...

{$R ...} tells the IDE to link the resource files (resource = "R") specified.

If you only work with Lazarus and NEVER will use the same code in Delphi you can delete all lines in the range in which the define FPC is not active.

[Fred vS]

it shloud be something like

Code: Pascal  [Select][+][-]

1. {$IFnDEF FPC}
2.   {$R *.dfm}  //<---- dfm
3. {$ELSE}
4.   {$R *.lfm}
5. {$ENDIF}
6.  

otherwise it is a no sense... This code is tipically come from Delphi transltation to FPC

Code: Pascal  [Select][+][-]

1. {$IFnDEF FPC}
2.   {$R *.dfm}  //<---- dfm
3. {$ELSE}
4.   {$IFDEF LCL}  // <---- lcl widget-set
5.     {$R *.lfm}
6.   {$ENDIF}
7. {$ENDIF}
8.  

 

[Nicole]

Thanks.

So my idea is, there must be a

Code: Pascal  [Select][+][-]

1. {$R *.lfm}  

(at least it does not work any more without it)

=> I never will turn back to Delphi, I am glad, to have left it behind.

[howardpc]

Well, for console apps, .lfm files are irrelevant, so you don't need any

Code: Pascal  [Select][+][-]

1. {$R *.lfm}

for those.

Even for GUI apps, you only need that resource directive in form files. It is not needed in other non-form files (such as a GUI's .lpr file).

If you use Lazarus as your code editor, you rarely need to even think about  that directive anyway, since Lazarus' management of the project ensures it is inserted automatically, and only where needed.