[fpc-devel] external problem

[Tomas Hajny]

On Thu, 25 Nov 2004 18:18:45 +0100, rstar wrote
> interface
> 
> procedure dfCrap(setoperation: Tso); cdecl;
> 
> implementation
> 
> {$LINK dfc.ow}   //GCC object file style
> 
> procedure dfCrap(setoperation: Tso); cdecl; external;
> ...
> 
> The declaration does exist in the interface!

Yes, that's the problem. You either need to remove the declaration from interface altogether, or move the complete declaration including import specification from implementation to interface.


> BTW: I am working under Win32.

However, you don't import the procedure from a DLL - see Peter's e-mail below.

Tomas


> Peter Vreman wrote:
> 
> >>-------------------------------------------------------------
> >>...
> >>implementation
> >>
> >>{$LINK dfc.ow}   //GCC object file style
> >>
> >>procedure dfCrap(setoperation: Tso); cdecl; external;
> >>...
> >>-------------------------------------------------------------
> >>
> >>Hi!
> >>The lines above do compile and work fine under previous versions of FPC.
> >>With the latest version of FPC I got the following error message:
> >>
> >>Free Pascal Compiler version 1.9.5 [2004/11/24] for i386
> >>dfTools.pas(107,11) Error: Can't declare procedure as EXTERNAL
> >>
> >>Has there something changed?
> >>    
> >>
> >
> >Yes, there is also a declaration in the interface. You can't declare a
> >procedure external in the implementation anymore when the interface says
> >that is needs to have a body. There is an exception for win32 and os/2
> >regarding to DLL imports.