Still broken, but adding several buildlink3.mk
  +.include "../../audio/ladspa/buildlink3.mk"
  +.include "../../audio/jack/buildlink3.mk"
  +.include "../../wip/dssi/buildlink3.mk"
  +.include "../../wip/libdssialsacompat/buildlink3.mk"
  +.include "../../wip/liblo/buildlink3.mk"
  +.include "../../math/fftwf/buildlink3.mk"
  +.include "../../textproc/liblrdf/buildlink3.mk"
Add two patches to disable libdll
Add pkg-config onto USE_TOOLS