Annoying warning message a'attribute declaration must precede definition'

[tester1234 0]

After migrating from borland to clang, we get this annoying warning, which I haven't been able to resolve.

Is this a known issue or are there any workarounds?

USEFORM("Label.cpp", fmLabelView);
USEFORM("Test.cpp", fmTestView);
USEFORM("Repro.cpp", fmReproView);

[bcc32c Warning] Label.cpp(123): attribute declaration must precede definition
[bcc32c Hint] sysclass.h(137): expanded from macro 'USEFORM'
[bcc32c Hint] sysmac.h(377): expanded from macro 'DELPHICLASS'
[bcc32c Hint] test.h(58): previous definition is here
class  TfmLabelView : public TfmFormTemplate

 

 

[Lars Fosdal 1877]

Find out where that attribute is declared and include the file?

or... is this relevant: https://docwiki.embarcadero.com/RADStudio/Sydney/en/Workaround_for_C%2B%2B11_Attributes_(Clang-enhanced_C%2B%2B_Compilers)

[tester1234 0]

10 minutes ago, Lars Fosdal said:

Find out where that attribute is declared and include the file?

So at the bottom of test.h we have

extern PACKAGE TfmLabelView* fmLabelView;

Edited January 30, 2023 by tester1234

[tester1234 0]

And test.h is included in the file that contains

USEFORM("Label.cpp", fmLabelView);

[weirdo12 26]

On 1/30/2023 at 6:38 AM, tester1234 said:

And test.h is included in the file that contains

USEFORM("Label.cpp", fmLabelView);

I assume you figured this out, eh?

[weirdo12 26]

The warning is caused by having #include "Label.h" *before* the USEFORM.

#include "Label.h"
...
USEFORM("Label.cpp", fmLabelView);

Try this:

USEFORM("Label.cpp", fmLabelView);
...
#include "Label.h"

 

[Michaell 3]

@weirdo12 I had today the same Clang problem, thanks for your post.