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Message-ID: <033001c2dade$b7a76130$666d86d9@webdev>
From: "Elfyn McBratney" <elfyn-cygwin AT exposure DOT org DOT uk>
To: "cygwin" <cygwin AT cygwin DOT com>, "Wil Hunt" <wilh AT gladstone DOT uoregon DOT edu>
References: <b397t8$k0m$1 AT main DOT gmane DOT org> <031a01c2dadb$bf7b0a40$666d86d9 AT webdev> <b398id$o57$1 AT main DOT gmane DOT org>
Subject: Re: DLL calling a DLL: undefined reference when linking.
Date: Sun, 23 Feb 2003 01:56:00 -0000
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> "Elfyn McBratney" <elfyn-cygwin AT exposure DOT org DOT uk> wrote in message
> news:031a01c2dadb$bf7b0a40$666d86d9 AT webdev...
> > >     I think I'm making marvelous progress.  Unfortunately, I'm getting
> an
> > > error that doesn't make sense:
> > >
> > > $g++ -shared -mno-cygwin -o dllhello.dll dllhello.o
> > > other.dll -Wl,--out-implib,libdllhello.a -Wl,--enable-stdcall-fixup
> > > Creating library file: libdllhello.a
> > > dllhello.o(.text+0x164):dllhello.C: undefined reference to `InitAPI AT 4'
> > >
> > > In my source code, the offending call is:
> > >
> > > extern "C" PASCAL void InitAPI( int handle );
> >
> >
> > Does dllhello.c include a header containing the prototype of InitAPI or
> have
> > a declaration of InitAPI? I think that's the gotcha.
> >
> >
> > Regards,
> >
> > Elfyn McBratney
> > elfyn AT exposure DOT org DOT uk
> > www.exposure.org.uk
>
> Both the extern prototype and the function call are in dllhello.C.  Thus
it
> does see the prototype.  As a further note and after further testing, if I
> use implib on other.dll, I get the export list.  If I add an alias in the
> .def file
>
> InitAPI AT 4
> InitAPI=InitAPI AT 4
>
> then use dlltool to create the library, I can link against that library
> successfully.
>
> So it seems clear that --enable-stdcall-fixup isn't working as advertised.
>
> Any idea why?
>
> Wil

What if you change the ordering, to say

extern "C" void PASCAL InitAPI( int handle );

? Or use __stdcall instead of PASCAL ?


Regards,

Elfyn McBratney
elfyn AT exposure DOT org DOT uk
www.exposure.org.uk



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