function sourcesfromdirs(root, dirs)
	local res = {}
	for i,v in dirs do
		local files = matchfiles(
			root..v.."/*.cpp",
			root..v.."/*.h",
			root..v.."/*.asm")
		listconcat(res, files)
	end
	return res
end

function trimrootdir(root, dirs)
	for i,v in dirs do
		dirs[i] = strsub(v, strlen(root))
	end
end

function listconcat(list, values)
	for i,v in values do
		table.insert(list, v)
	end
end