You're probably just not linking to the xpcom glue library in eclipse/gcc.
- Kyle
On Tue, Mar 8, 2016 at 8:33 PM, Tobias Wolf <wolf.tob...@gmx.net> wrote:
> We`re develping a PKCS11 modul in c/c++ for a custom card reader to
> support. I just want to display a simple dialog. The code below works great
> until I stay on MS Visual Studio. But our project is running on eclipse/gcc.
>
> nsCOMPtr<nsIPromptService> promptService = do_GetService("@
> mozilla.org/embedcomp/prompt-service;1"));
> promptService->Alert(NULL, NULL, NULL);
>
> I`m getting the following error during linking, that comes because of the
> different coding convention between VS and mingw/gcc on windows.
>
> C:/download/xulrunner-41.0b9.en-US.win64.sdk/xulrunner-sdk/include/nsCOMPtr.h:514:
> undefined reference to
> `nsCOMPtr_base::assign_from_gs_contractid(nsGetServiceByContractID, nsID
> const&)'
>
> Am Montag, 7. März 2016 18:50:36 UTC+1 schrieb Benjamin Smedberg:
> > On 3/7/2016 11:17 AM, Tobias Wolf wrote:
> > > I try to call this code dynamically:
> > >
> > > nsCOMPtr<nsIPromptService> promptService = do_GetService("@
> mozilla.org/embedcomp/prompt-service;1"));
> > > promptService->Alert(NULL, NULL, NULL);
> > >
> > > I do the following:
> > >
> > > nsISomeInterface* mXPTCStub;
> > > nsresult rc;
> > > nsXPTCVariant params[3];
> >
> > Why are you trying to do this? Are you writing a shim layer that
> > connects some other dynamic/scripting language to XPCOM?
> >
> > >
> > > rc = NS_GetXPTCallStub(NS_IPROMPTSERVICE_IID, proxy, &mXPTCStub);
> > >
> > > params[0].val.p = NULL;
> > > params[0].type = nsXPTType::T_VOID;
> > > params[0].flags = 0;
> > >
> > > params[1].val.p = (void*)title;
> > > params[1].type = nsXPTType::T_CHAR_STR;
> > > params[1].flags = 0;
> > >
> > > params[2].val.p = (void*)text;
> > > params[2].type = nsXPTType::T_CHAR_STR;
> > > params[2].flags = 0;
> > >
> > > rc = NS_InvokeByIndex(mXPTCStub, 1, 3, params);
> > > NS_DestroyXPTCallStub(mXPTCStub);
> > >
> > > But I don`t know how to use NS_GetXPTCallStub!
> > > What means the second and third parameter from NS_GetXPTCallStub?
> >
> > Have you read the doccomments at
> >
> http://mxr.mozilla.org/mozilla-central/source/xpcom/reflect/xptcall/xptcall.h#174
> > ?
> >
> > If you are trying to *invoke* a method, you don't need an xptcall stub
> > at all. You just need NS_InvokeByIndex.
> >
> > An XPTCall stub is used to *implement* an XPCOM object whose
> > type/interface definition isn't known at compile time, typically by
> > mirroring it to an underlying scriptable object. You would need to
> > implement a c++ class which implements nsIXPTCProxy and implements
> > CallMethod.
> >
> > --BDS
> _______________________________________________
> dev-platform mailing list
> dev-platform@lists.mozilla.org
> https://lists.mozilla.org/listinfo/dev-platform
>
_______________________________________________
dev-platform mailing list
dev-platform@lists.mozilla.org
https://lists.mozilla.org/listinfo/dev-platform
