Pi3 Buster light compilation error

Hello, I'm trying to compile gst-omx master branch under the new Buster Light Pi3. I've problem in the make with make -j4 I've error that #include <OMX_Broadcom.h> is not found so I've configured CFLAGS like this:

CFLAGS='-Wno-error -Wno-redundant-decls -I/opt/vc/include -I/opt/vc/include/interface/vcos/pthreads -I/opt/vc/include/interface/vmcs_host/linux -I/opt/vc/include/interface/vmcs_host/khronos/IL'

and make like this make LDFLAGS+='-L/opt/vc/lib' -j4

now the file is resolved but I've this error in the make process:

`make[2]: Entering directory '/home/pi/src/gstreamer/gst-omx/omx'
  CC       libgstomx_la-gstomx.lo
  CC       libgstomx_la-gstomxallocator.lo
  CC       libgstomx_la-gstomxbufferpool.lo
  CC       libgstomx_la-gstomxvideo.lo
In file included from gstomx.h:62,
                 from gstomxallocator.h:30,
                 from gstomxallocator.c:25:
/home/pi/src/gstreamer/gst-omx/omx/openmax/OMX_VideoExt.h:44:14: error: nested redefinition of ‘enum OMX_NALUFORMATSTYPE’
 typedef enum OMX_NALUFORMATSTYPE {
              ^~~~~~~~~~~~~~~~~~~
/home/pi/src/gstreamer/gst-omx/omx/openmax/OMX_VideoExt.h:44:14: error: redeclaration of ‘enum OMX_NALUFORMATSTYPE’
In file included from gstomx.h:58,
                 from gstomxallocator.h:30,
                 from gstomxallocator.c:25:
/opt/vc/include/interface/vmcs_host/khronos/IL/OMX_Broadcom.h:1951:14: note: originally defined here
 typedef enum OMX_NALUFORMATSTYPE {
              ^~~~~~~~~~~~~~~~~~~
In file included from gstomx.h:62,
                 from gstomxallocator.h:30,
                 from gstomxallocator.c:25:
/home/pi/src/gstreamer/gst-omx/omx/openmax/OMX_VideoExt.h:45:5: error: redeclaration of enumerator ‘OMX_NaluFormatStartCodes’
     OMX_NaluFormatStartCodes = 1,
     ^~~~~~~~~~~~~~~~~~~~~~~~
In file included from gstomx.h:58,
                 from gstomxallocator.h:30,
                 from gstomxallocator.c:25:
/opt/vc/include/interface/vmcs_host/khronos/IL/OMX_Broadcom.h:1952:5: note: previous definition of ‘OMX_NaluFormatStartCodes’ was here
     OMX_NaluFormatStartCodes = 1,
     ^~~~~~~~~~~~~~~~~~~~~~~~
`

and others like this.

I'm not expert in compilation so I think there is some flags that I forgot to configure.

Thank you for attention