Skia Fails due to Unknown Function. set_sources_assignment_filter([])

[MattReid73]

Hi,
I am trying to add the TotalCross layer into my embedded Linux image based on the Toradex Multimedia Reference Image. When trying to build skia which is using the skia_71.bb recipe from meta_totalcross it fails to build gn.

Error at //BUILD.gn:858:3: Unknown function. set_souces_assingment_filter([])

Searching the error show that this is probably due to gn not being backward compatible: nodejs/build#2696
but what version of gn or meta-browser does meta-totalcross require?

Thanks
Matt