Move last external variable to shared project (Compilation_Mode).

The shared project usually collects such settings.

Author: asarhaddon

lib/gnat/aunit.gpr

@@ -3,9 +3,6 @@ with "aunit_shared";
 
 project AUnit is
 
-   type Compilation_Mode_Type is ("Devel", "Install");
-   Mode : Compilation_Mode_Type := external ("MODE", "Install");
-
    for Source_Dirs use
      ("../../include/aunit/framework",
       "../../include/aunit/containers",
@@ -42,7 +39,7 @@ project AUnit is
    --------------
 
    package Compiler is
-      case Mode is
+      case AUnit_Shared.Compilation_Mode is
          when "Devel" =>
             for Default_Switches ("ada") use
               ("-g", "-gnatQ", "-O1", "-gnatf", "-gnato",

lib/gnat/aunit_shared.gpr

@@ -1,5 +1,8 @@
 project AUnit_Shared is
 
+   type Compilation_Mode_Type is ("Devel", "Install");
+   Compilation_Mode : Compilation_Mode_Type := external ("MODE", "Install");
+
    Target := external ("PLATFORM", "native");
 
    type Runtime_Type is