Re: [Qemu-devel] [RFC PATCH 04/10] qemu-ga: Add Windows VSS provider to quiesce applications on fsfreeze

[Vadim Rozenfeld <vrozenfe@redhat.com>]

On Tue, 2013-03-26 at 08:09 +0100, Paolo Bonzini wrote:
> Il 25/03/2013 21:50, Tomoki Sekiyama ha scritto:
> > Hi,
> > 
> > Paolo Bonzini <pbonzini@redhat.com> wrote:
> >> Il 14/02/2013 07:10, Tomoki Sekiyama ha scritto:
> >>> diff --git a/qga/vss-win32-provider/qga-provider.idl
> >> b/qga/vss-win32-provider/qga-provider.idl
> >>> new file mode 100644
> >>> index 0000000..17abca0
> >>> --- /dev/null
> >>> +++ b/qga/vss-win32-provider/qga-provider.idl
> >>> @@ -0,0 +1,20 @@
> >>> +import "oaidl.idl";
> >>> +import "ocidl.idl";
> >>> +
> >>> +[
> >>> +    uuid(103B8142-6CE5-48A7-BDE1-794D3192FCF1),
> >>> +    version(1.0),
> >>> +    helpstring("QGAVSSProvider Type Library")
> >>> +]
> >>> +library QGAVSSHWProviderLib
> >>> +{
> >>> +    importlib("stdole2.tlb");
> >>> +    [
> >>> +        uuid(6E6A3492-8D4D-440C-9619-5E5D0CC31CA8),
> >>> +        helpstring("QGAVSSProvider Class")
> >>> +    ]
> >>> +    coclass QGAVSSHWProvider
> >>> +    {
> >>> +        [default] interface IUnknown;
> >>> +    };
> >>> +};
> >>
> >> Ok, I checked widl and it chokes on the importlib line.  If that can be
> >> removed, it's fine to use widl.
> >>
> >> The invocation is
> >>
> >> 	widl -m32/-m64 -o qga-provider.tlb -t qga-provider.idl
> >>
> >> where code to choose between -m32 and -m64 is already in the configure
> >> script (search for `case "$cpu"`).
> >>
> >> Paolo
> > 
> > Unfortunately, if I remove importlib("stdole2.tlb"), generated .tlb seems
> > rejected to register into Windows COM+ Catalog.
> > 
> > Wine has stdole2.tlb in its fakedlls directory, but widl does not accept
> > this by
> > 
> >   error: Wrong or unsupported typelib magic 405a4d
> > 
> > Even if I copied native stdole2.tlb, widl fails with the same error.
> > 
> > Do you have any idea about this error?

Seems like your tlb has nonstandard identifying characters. Check first
several bytes of the tlb file. Usually it should be something like '4D
53 46 54', or '4D 5A 90'
   
> 
> No, I suggest you ask on the Wine mailing lists.  In the meanwhile we
> can include a precompiled .tlb file in the QEMU repository and use midl.
> 
> Paolo
>