Simplified compilation of function calls

src/core/EvaluateDot.go

@@ -59,19 +59,24 @@ func (f *Function) EvaluateDot(expr *expression.Expression) (eval.Value, error)
 		return value, nil
 	}
 
-	uniqueName := fmt.Sprintf("%s.%s", leftText, rightText)
-	function, exists := f.All.Functions[uniqueName]
+	if leftText != "main" {
+		imp, exists := f.File.Imports[leftText]
 
-	if exists {
-		f.File.Imports[leftText].Used = true
+		if exists {
+			imp.Used = true
+		} else {
+			_, exists := f.All.Extern[leftText]
 
-		value := &eval.Label{
-			Typ:   types.AnyPointer,
-			Label: function.UniqueName,
+			if !exists {
+				return nil, errors.New(&errors.UnknownPackage{Name: leftText}, f.File, left.Token.Position)
+			}
 		}
-
-		return value, nil
 	}
 
-	return nil, errors.New(&errors.UnknownIdentifier{Name: uniqueName}, f.File, left.Token.Position)
+	value := &eval.Label{
+		Typ:   types.AnyPointer,
+		Label: fmt.Sprintf("%s.%s", leftText, rightText),
+	}
+
+	return value, nil
 }