[ros-dev] Kernel streaming header mess / GUIDs

Andrew Greenwood reactos-development at silverblade.co.uk
Sun Sep 30 12:46:33 CEST 2007

Thanks for the replies... It *should* build with MSVC now. I'm gonna have
to fire up my laptop at some point and try building ROS on that, to find

The main issue I have at the moment is how to get MinGW/GCC to handle
things. As has been pointed out, the header uses MSVC-specific stuff.

So I need to figure out how to do it in a way so that GCC won't regurgitate
it at me later.

Doing this has at least shut up all the warnings about "cdecl" only being
applicable to functions:
    #ifdef __GNUC__
        #define DEFINE_GUIDEX(name) EXTERN_C const GUID name
        #define DEFINE_GUIDEX(name) EXTERN_C const CDECL GUID name

Having changed my code now so that it reads:
dev_info = SetupDiGetClassDevsExW(&KSCATEGORY_AUDIO, ......);

It's still doing what it has always done, when linking:
[LD]       output-i386/base/services/audiosrv/audiosrv.exe
obj-i386/base/services/audiosrv/pnp.o: In function
undefined reference to `_KSCATEGORY_AUDIO'

(this occurs multiple times, whenever KSCATEGORY_AUDIO is used)

I've tried INIT_GUID and PUT_GUIDS_HERE and all the things I can think of
to make it work. i've even tried removing the EXTERN_C from the macros at
the top.

Where am I going wrong?

On Sat, 29 Sep 2007 10:49:11 +0100, "Ged Murphy" <gedmurphy at gmail.com>
> http://www.winehq.org/pipermail/wine-devel/2004-March/025393.html
> On 9/28/07, James Tabor
> <jimtabor at adsl-64-217-116-74.dsl.hstntx.swbell.net>
> wrote:
>> Ged wrote:
>> > IMO, the 3 solutions are to either
>> > 1. assign your GUID manually using the { ... { ... }} convention
>> > 2. change the ksmedia.h header to be more GCC friendly
>> > 3. add support for __decelspec(uuid()) and __uuidof to our code base.
> It
>> > might be worth checking Wine for this as I think it's been done by
> them
>> > before.
>> >
>> > Hope that helps,
>> > Ged.
>> From wine/include/winnt.h line 76:
>> #ifndef DECLSPEC_UUID
>> # if defined(_MSC_VER) && (_MSC_VER >= 1100) && defined (__cplusplus)
>> #  define DECLSPEC_UUID(x) __declspec(uuid(x))
>> # else
>> #  define DECLSPEC_UUID(x)
>> # endif
>> #endif
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