[Lazarus] porting delphi project code

[Mattias Gaertner]

> Juha Manninen <juha.manninen62 at gmail.com> hat am 2. Juni 2013 um 13:32
> geschrieben:
>[...]
> File jvcl.inc is included in most source files. It has tests :
>
> {$IFDEF DELPHI5}
> {$I jvcld5.inc}
> {$DEFINE JVCL_CONFIGURED}
> {$ENDIF DELPIH5}
>
> {$IFDEF DELPHI6}
> {$I jvcld6.inc}
> {$DEFINE JVCL_CONFIGURED}
> {$ENDIF DELPIH6}
>
> ... and so on for every Delphi and C++Builder version.
> Then :
>
> {$IFNDEF JVCL_CONFIGURED}
> {$IFDEF SUPPORTS_COMPILETIME_MESSAGES}
> {$MESSAGE FATAL 'Your Delphi/BCB version is not supported by this
> JVCL version!'}
> {$ELSE}
> 'Your Delphi/BCB version is not supported by this JVCL version!'
> {$ENDIF SUPPORTS_COMPILETIME_MESSAGES}
> {$ENDIF !JVCL_CONFIGURED}
>
> The {$ELSE} part is correctly triggered and throws an exception.
>
> There is no way to convert Jedi libs for Lazarus. The converter only
> should stop as gracefully as possible. I think it is rather good now
> because it clearly tells where the conversion failed and now it
> properly converts every file suggesfully parsed before the error.
>
> Still, this is a PITA for the automatic conversion because it happens
> with most non-trivial projects.

Maybe optionally add a -dDelphi7?


> Sometimes codetools has thrown exceptions because of unusual code
> which is still legal in Delphi. There was the old issue #16061 about a
> strange use of {$IF...
> I have not seen similar things recently, maybe codetools is so good now.

codetools now recognizes the "declared" call, but it simply results to true.

Mattias