Description: Explicitly use gnatgcc as the compiler driver rather than gcc.
 Gcc may not be the default Ada compiler.
 .
 The part in asis/a4g-a_opt.ads circumvents #759038.
 The removed test was redundant in Debian anyway:
 per policy, libasis-dev depends on the gnat-X it was compiled with.
 Moreover, another test checks the tree format version.
Author: Ludovic Brenta <lbrenta@debian.org>
Author: Nicolas Boulenguez <nicolas@debian.org>

Forwarded: not-needed
--- a/asis/a4g-gnat_int.adb
+++ b/asis/a4g-gnat_int.adb
@@ -75,7 +75,7 @@
 
    LT           : String renames ASIS_Line_Terminator;
    Standard_GCC : constant String_Access :=
-     GNAT.OS_Lib.Locate_Exec_On_Path ("gcc");
+     GNAT.OS_Lib.Locate_Exec_On_Path ("gnatgcc");
 
    -----------------
    -- Create_Tree --
--- a/tools/tool_utils/asis_ul-common.adb
+++ b/tools/tool_utils/asis_ul-common.adb
@@ -180,7 +180,7 @@
    declare
       Target        : constant String := Detect_Target;
       Gcc_Name      : constant String :=
-        (if Target = "AAMP" then "gnaamp" else Target & "gcc");
+        (if Target = "AAMP" then "gnaamp" else Target & "gnatgcc");
       Gnatmake_Name : constant String :=
         (if Target = "AAMP" then "gnaampmake" else Target & "gnatmake");
       pragma Unreferenced (Gnatmake_Name);
--- a/asis/a4g-contt.adb
+++ b/asis/a4g-contt.adb
@@ -989,7 +989,7 @@
                if Dash_Idx > 0 then
                   Contexts.Table (Cont).GCC :=
                     Locate_Exec_On_Path
-                      (Tool_Name (Tool_Name'First .. Dash_Idx) & "gcc");
+                      (Tool_Name (Tool_Name'First .. Dash_Idx) & "gnatgcc");
                end if;
 
             end;
--- a/asis/a4g-a_opt.ads
+++ b/asis/a4g-a_opt.ads
@@ -59,7 +59,7 @@
    --  treated as an error: ASIS_Failed is raised and the warning message is
    --  sent to an ASIS Diagnosis string.
 
-   Strong_Version_Check : Boolean := True;
+   Strong_Version_Check : Boolean := False;
    --  Strong version check means that version strings read from the tree and
    --  stored in Gnatvsn are compared. Weak check means comparing ASIS version
    --  numbers. See BA23-002