build: separate compiler and libs

compiler/cl/_testrt/cvar/in.go

@@ -0,0 +1,19 @@
+package main
+
+import _ "unsafe"
+
+//go:linkname barX _bar_x
+var barX struct {
+	Arr       [16]int8
+	Callbacks [2]func()
+}
+
+//go:linkname barY _bar_y
+var barY struct {
+	Arr [16]int8
+}
+
+func main() {
+	_ = barX
+	_ = barY
+}