[Bug 796928] New: wasapi plugins fail to build with Visual Studio when using the Windows 8.1 SDK

[GStreamer (GNOME Bugzilla)]

https://bugzilla.gnome.org/show_bug.cgi?id=796928

            Bug ID: 796928
           Summary: wasapi plugins fail to build with Visual Studio when
                    using the Windows 8.1 SDK
    Classification: Platform
           Product: GStreamer
           Version: git master
                OS: Windows
            Status: NEW
          Severity: major
          Priority: Normal
         Component: gst-plugins-bad
          Assignee: gstreamer-bugs at lists.freedesktop.org
          Reporter: nirbheek.chauhan at gmail.com
        QA Contact: gstreamer-bugs at lists.freedesktop.org
     GNOME version: ---

Install Visual Studio 2015 with only the Windows 8.1 SDK selected, open a
Visual Studio command line prompt, clone gst-build and build it with Meson.
You'll get the following error:

ninja: Entering directory `build'
[1/130] Linking target subprojects/gst-plugins-bad/sys/wasapi/gstwasapi.dll.
FAILED: subprojects/gst-plugins-bad/sys/wasapi/gstwasapi.dll
link @subprojects/gst-plugins-bad/sys/wasapi/gstwasapi.dll.rsp
gstwasapisrc.c.obj : error LNK2005: _PKEY_AudioEndpoint_FormFactor already
defined in gstwasapi.c.obj
gstwasapisrc.c.obj : error LNK2005:
_PKEY_AudioEndpoint_ControlPanelPageProvider already defined in gstwasapi.c.obj
gstwasapisrc.c.obj : error LNK2005: _PKEY_AudioEndpoint_Association already
defined in gstwasapi.c.obj
gstwasapisrc.c.obj : error LNK2005: _PKEY_AudioEndpoint_PhysicalSpeakers
already defined in gstwasapi.c.obj
gstwasapisrc.c.obj : error LNK2005: _PKEY_AudioEndpoint_GUID already defined in
gstwasapi.c.obj
gstwasapisrc.c.obj : error LNK2005: _PKEY_AudioEndpoint_Disable_SysFx already
defined in gstwasapi.c.obj
gstwasapisrc.c.obj : error LNK2005: _PKEY_AudioEndpoint_FullRangeSpeakers
already defined in gstwasapi.c.obj
gstwasapisrc.c.obj : error LNK2005:
_PKEY_AudioEndpoint_Supports_EventDriven_Mode already defined in
gstwasapi.c.obj
gstwasapisrc.c.obj : error LNK2005: _PKEY_AudioEndpoint_JackSubType already
defined in gstwasapi.c.obj
gstwasapisrc.c.obj : error LNK2005: _PKEY_AudioEngine_DeviceFormat already
defined in gstwasapi.c.obj
gstwasapisrc.c.obj : error LNK2005: _PKEY_AudioEngine_OEMFormat already defined
in gstwasapi.c.obj
gstwasapisink.c.obj : error LNK2005: _PKEY_AudioEndpoint_FormFactor already
defined in gstwasapi.c.obj
gstwasapisink.c.obj : error LNK2005:
_PKEY_AudioEndpoint_ControlPanelPageProvider already defined in gstwasapi.c.obj
gstwasapisink.c.obj : error LNK2005: _PKEY_AudioEndpoint_Association already
defined in gstwasapi.c.obj
gstwasapisink.c.obj : error LNK2005: _PKEY_AudioEndpoint_PhysicalSpeakers
already defined in gstwasapi.c.obj
gstwasapisink.c.obj : error LNK2005: _PKEY_AudioEndpoint_GUID already defined
in gstwasapi.c.obj
gstwasapisink.c.obj : error LNK2005: _PKEY_AudioEndpoint_Disable_SysFx already
defined in gstwasapi.c.obj
gstwasapisink.c.obj : error LNK2005: _PKEY_AudioEndpoint_FullRangeSpeakers
already defined in gstwasapi.c.obj
gstwasapisink.c.obj : error LNK2005:
_PKEY_AudioEndpoint_Supports_EventDriven_Mode already defined in
gstwasapi.c.obj
gstwasapisink.c.obj : error LNK2005: _PKEY_AudioEndpoint_JackSubType already
defined in gstwasapi.c.obj
gstwasapisink.c.obj : error LNK2005: _PKEY_AudioEngine_DeviceFormat already
defined in gstwasapi.c.obj
gstwasapisink.c.obj : error LNK2005: _PKEY_AudioEngine_OEMFormat already
defined in gstwasapi.c.obj
gstwasapiutil.c.obj : error LNK2005: _PKEY_AudioEndpoint_FormFactor already
defined in gstwasapi.c.obj
gstwasapiutil.c.obj : error LNK2005:
_PKEY_AudioEndpoint_ControlPanelPageProvider already defined in gstwasapi.c.obj
gstwasapiutil.c.obj : error LNK2005: _PKEY_AudioEndpoint_Association already
defined in gstwasapi.c.obj
gstwasapiutil.c.obj : error LNK2005: _PKEY_AudioEndpoint_PhysicalSpeakers
already defined in gstwasapi.c.obj
gstwasapiutil.c.obj : error LNK2005: _PKEY_AudioEndpoint_GUID already defined
in gstwasapi.c.obj
gstwasapiutil.c.obj : error LNK2005: _PKEY_AudioEndpoint_Disable_SysFx already
defined in gstwasapi.c.obj
gstwasapiutil.c.obj : error LNK2005: _PKEY_AudioEndpoint_FullRangeSpeakers
already defined in gstwasapi.c.obj
gstwasapiutil.c.obj : error LNK2005:
_PKEY_AudioEndpoint_Supports_EventDriven_Mode already defined in
gstwasapi.c.obj
gstwasapiutil.c.obj : error LNK2005: _PKEY_AudioEndpoint_JackSubType already
defined in gstwasapi.c.obj
gstwasapiutil.c.obj : error LNK2005: _PKEY_AudioEngine_DeviceFormat already
defined in gstwasapi.c.obj
gstwasapiutil.c.obj : error LNK2005: _PKEY_AudioEngine_OEMFormat already
defined in gstwasapi.c.obj
gstwasapidevice.c.obj : error LNK2005: _PKEY_AudioEndpoint_FormFactor already
defined in gstwasapi.c.obj
gstwasapidevice.c.obj : error LNK2005:
_PKEY_AudioEndpoint_ControlPanelPageProvider already defined in gstwasapi.c.obj
gstwasapidevice.c.obj : error LNK2005: _PKEY_AudioEndpoint_Association already
defined in gstwasapi.c.obj
gstwasapidevice.c.obj : error LNK2005: _PKEY_AudioEndpoint_PhysicalSpeakers
already defined in gstwasapi.c.obj
gstwasapidevice.c.obj : error LNK2005: _PKEY_AudioEndpoint_GUID already defined
in gstwasapi.c.obj
gstwasapidevice.c.obj : error LNK2005: _PKEY_AudioEndpoint_Disable_SysFx
already defined in gstwasapi.c.obj
gstwasapidevice.c.obj : error LNK2005: _PKEY_AudioEndpoint_FullRangeSpeakers
already defined in gstwasapi.c.obj
gstwasapidevice.c.obj : error LNK2005:
_PKEY_AudioEndpoint_Supports_EventDriven_Mode already defined in
gstwasapi.c.obj
gstwasapidevice.c.obj : error LNK2005: _PKEY_AudioEndpoint_JackSubType already
defined in gstwasapi.c.obj
gstwasapidevice.c.obj : error LNK2005: _PKEY_AudioEngine_DeviceFormat already
defined in gstwasapi.c.obj
gstwasapidevice.c.obj : error LNK2005: _PKEY_AudioEngine_OEMFormat already
defined in gstwasapi.c.obj
   Creating library subprojects\\gst-plugins-bad\\sys\\wasapi\\gstwasapi.lib
and object subprojects\\gst-plugins-bad\\sys\\wasapi\\gstwasapi.exp
subprojects/gst-plugins-bad/sys/wasapi/gstwasapi.dll : fatal error LNK1169: one
or more multiply defined symbols found
[8/130] Linking target subprojects/gst-plugins-bad/sys/winks/gstwinks.dll.
   Creating library subprojects\\gst-plugins-bad\\sys\\winks\\gstwinks.lib and
object subprojects\\gst-plugins-bad\\sys\\winks\\gstwinks.exp
[10/130] Compiling C object
subprojects/gst-plugins-bad/ext/gl/subprojects at gst-plugins-bad@ext at gl@@gstopenglmixers at sha/gstglvideomixer.c.obj.
ninja: build stopped: subcommand failed.

---

This error is confusing to me because I have no idea where those symbols are
coming from. Probably a header? But we guard all our header includes.

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