Linking a winelib application with a windows dll

[Thomas Trummer]

Hi,

I have a windows dll without source code (vendor.dll) that I want to use in
a winelib application.

There are two problems however:

1) Creating a vendor.def file doesn't work. The resulting file has an empty
EXPORTS section:

winedump spec vendor.dll
winebuild --def -E vendor.spec -o vendor.def

2) According to an older mailing post it should be possbile to use the .def
file to link:

winegcc -o test test.o -lvendor

However, this fails:

/usr/bin/ld: cannot find -lvendor
collect2: ld returned 1 exit status
winegcc: i486-linux-gnu-gcc failed

Thomas

[Thomas Trummer]

Hi,

OK, a minute after I sent the mail I figured out number two:

For vendor.dll the corresponding .def file has to be called libvendor.def.

I still need help with point one, though.

Thomas

[André Hentschel]

Thomas Trummer schrieb:
> Hi,
>
> I have a windows dll without source code (vendor.dll) that I want to use
> in a winelib application.
>
> There are two problems however:
> - Creating a vendor.def file doesn't work. The resulting file has an
>
> empty EXPORTS section:
>
> winedump spec vendor.dll
> winebuild --def -E vendor.spec -o vendor.def
> - According to an older mailing post it should be possbile to use the
>
> .def file to link:
>
> winegcc -o test test.o -lvendor
>
> However, this fails:
>
> /usr/bin/ld: cannot find -lvendor
> collect2: ld returned 1 exit status
> winegcc: i486-linux-gnu-gcc failed
>
> Thomas

Hi Thomas,
You need the Headerfile for your dll. If you got it and put it in the same Folder you can run:
 winedump spec -I . vendor.dll
-I specifies the path where to search for function prototypes, so the spec-file doesnt include only stubs.
Stubs are ignored when generating a def file.
Of course you also can rewrite the stubs into stdcalls by yourself, but i bet you wont.

[Juan Lang]

> I have a windows dll without source code (vendor.dll) that I want to use in
> a winelib application.
> - Creating a vendor.def file doesn't work. The resulting file has an empty
>
> EXPORTS section:
>
> winedump spec vendor.dll
> winebuild --def -E vendor.spec -o vendor.def

That seems to mean winedump isn't parsing this right, or that it truly
has no exports.  You want to debug winedump, perhaps by adding the -v
flag to winedump.
--Juan

[Steven Edwards]

On Sat, Aug 22, 2009 at 11:17 AM, Juan Lang wrote:
> > - Creating a vendor.def file doesn't work. The resulting file has an empty
> >
> > EXPORTS section:
> >
> > winedump spec vendor.dll
> > winebuild --def -E vendor.spec -o vendor.def
>
> That seems to mean winedump isn't parsing this right, or that it truly
> has no exports.  You want to debug winedump, perhaps by adding the -v
> flag to winedump.

You can use something like dependancy walker to verify the function
names that it exports.

[Thomas Trummer]

Hi,

The Dll exports its function names using the __stdcall decorations e.g.
_GetLibraryVersion@0. Windows OS Dlls also provide an undecorated name
(GetLibraryVersion) which winedump expects. While it would be easy to fix
winedump I'm not sure this would suffice. Especially I don't know if it's
actually possible to call decorated Dll functions from a winelib
application.

Therefore I'm going to use LoadLibrary et.al. which is a bit tiresome with
300 exported functions but at least is guaranteed to work.

Thomas