Biggish refactor to break cycles; my build rules were full of them. cpm builds,

which requires top and topgen.

mach/i80/libem/build.lua

@@ -0,0 +1,8 @@
+for _, plat in ipairs(vars.plats) do
+	acklibrary {
+		name = "lib_"..plat,
+		srcs = { "./*.s" },
+		vars = { plat = plat },
+	}
+end
+

mach/i80/libend/build.lua

@@ -0,0 +1,8 @@
+for _, plat in ipairs(vars.plats) do
+	acklibrary {
+		name = "lib_"..plat,
+		srcs = { "./*.s" },
+		vars = { plat = plat },
+	}
+end
+

mach/proto/top/build.lua

@@ -0,0 +1,19 @@
+include("util/topgen/build.lua")
+
+definerule("build_top",
+	{
+		arch = { type="string" },
+	},
+	function(e)
+		local t = topgen {
+			name = e.name.."_topgen",
+			srcs = { "mach/"..e.arch.."/top/table" }
+		}
+
+		return cprogram {
+			name = e.name,
+			srcs = { "mach/proto/top/*.c", },
+			deps = { t },
+		}
+	end
+)