[gcc r12-6451] [Ada] Simplify construction of messages about configurable runtime

[Pierre-Marie de Rodat <pmderodat@gcc.gnu.org>]

https://gcc.gnu.org/g:42c54add83708c37b350c71a2979f2d7483a1656

commit r12-6451-g42c54add83708c37b350c71a2979f2d7483a1656
Author: Piotr Trojanek <trojanek@adacore.com>
Date:   Mon Jan 3 16:48:01 2022 +0100

    [Ada] Simplify construction of messages about configurable runtime
    
    gcc/ada/
    
            * errout.adb (Error_Msg_CRT): Build message with string
            concatenation; it is slightly repetitive but much easier to
            read.

Diff:
---
 gcc/ada/errout.adb | 17 ++---------------
 1 file changed, 2 insertions(+), 15 deletions(-)

diff --git a/gcc/ada/errout.adb b/gcc/ada/errout.adb
index b3c385682f7..b8626376b0c 100644
--- a/gcc/ada/errout.adb
+++ b/gcc/ada/errout.adb
@@ -827,27 +827,14 @@ package body Errout is
    -------------------
 
    procedure Error_Msg_CRT (Feature : String; N : Node_Id) is
-      CNRT : constant String := " not allowed in no run time mode";
-      CCRT : constant String := " not supported by configuration>";
-
-      S : String (1 .. Feature'Length + 1 + CCRT'Length);
-      L : Natural;
-
    begin
-      S (1) := '|';
-      S (2 .. Feature'Length + 1) := Feature;
-      L := Feature'Length + 2;
-
       if No_Run_Time_Mode then
-         S (L .. L + CNRT'Length - 1) := CNRT;
-         L := L + CNRT'Length - 1;
+         Error_Msg_N ('|' & Feature & " not allowed in no run time mode", N);
 
       else pragma Assert (Configurable_Run_Time_Mode);
-         S (L .. L + CCRT'Length - 1) := CCRT;
-         L := L + CCRT'Length - 1;
+         Error_Msg_N ('|' & Feature & " not supported by configuration>", N);
       end if;
 
-      Error_Msg_N (S (1 .. L), N);
       Configurable_Run_Time_Violations := Configurable_Run_Time_Violations + 1;
    end Error_Msg_CRT;