[Ada] Mention -gnat2020 in error message

gcc/ada/

	* sem_ch13.adb (Check_Aspect_Too_Late): Mention -gnat2020 switch
	in error message.

diff --git a/gcc/ada/sem_ch13.adb b/gcc/ada/sem_ch13.adb
index 5937ce2..6283624 100644 (file)
--- a/gcc/ada/sem_ch13.adb
+++ b/gcc/ada/sem_ch13.adb
@@ -1034,7 +1034,8 @@ package body Sem_Ch13 is
               and then Has_Primitive_Operations (Parent_Type)
             then
                Error_Msg_N
-                 ("|representation aspect not permitted before Ada 202x!", N);
+                 ("|representation aspect not permitted before Ada 202x: " &
+                  "use -gnat2020!", N);
                Error_Msg_NE
                  ("\parent type & has primitive operations!", N, Parent_Type);