gprbuild, gnatprove: configure for aarch64 (#394093)

pkgs/development/ada-modules/gnatprove/0002-mute-aarch64-warnings.patch

@@ -0,0 +1,22 @@
+--- a/src/counterexamples/ce_parsing.adb	2025-03-14 21:48:15.657409808 +0100
++++ b/src/counterexamples/ce_parsing.adb	2025-03-14 22:04:32.114664704 +0100
+@@ -975,6 +975,9 @@
+                elsif Is_Extended_Precision_Floating_Point_Type (Ty) then
+                   pragma Assert (Size (Exp) = 15);
+                   pragma Assert (Size (Significand) = 63);
++                  pragma Warnings (Off, "assertion will fail at run time");
++                  pragma Warnings (Off,
++                      "types for unchecked conversion have different sizes");
+                   declare
+                      package P is new Parse_Conversion
+                        (Interfaces.Unsigned_128, Long_Long_Float);
+@@ -983,6 +986,9 @@
+                   begin
+                      return (Float_K, (Extended_K, F));
+                   end;
++                  pragma Warnings (On,
++                      "types for unchecked conversion have different sizes");
++                  pragma Warnings (On, "assertion will fail at run time");
+                else
+                   raise Program_Error;
+                end if;

pkgs/development/ada-modules/gnatprove/default.nix

@@ -56,6 +56,9 @@ let
       patches = [
         # Disable Coq related targets which are missing in the fsf-14 branch
         ./0001-fix-install.patch
+
+        # Suppress warnings on aarch64: https://github.com/AdaCore/spark2014/issues/54
+        ./0002-mute-aarch64-warnings.patch
       ];
       commit_date = "2024-01-11";
     };

pkgs/development/ada-modules/gprbuild/nixpkgs-gnat.xml

@@ -53,4 +53,37 @@
       <grep regexp="[^\r\n]+"></grep>
     </target>
   </compiler_description>
+  <configuration>
+    <!-- aarch64-linux - native compiler. -->
+    <targets>
+      <target name="^aarch64-unknown-linux-gnu$" />
+    </targets>
+    <hosts>
+      <host name="^aarch64-unknown-linux-gnu$" />
+    </hosts>
+    <config>
+   for Archive_Builder  use ("ar", "cr");
+   for Archive_Builder_Append_Option use ("q");
+   for Archive_Indexer  use ("ranlib");
+   for Archive_Suffix   use ".a";
+    </config>
+  </configuration>
+  <configuration>
+    <!-- aarch64-linux - native compiler. -->
+    <targets>
+      <target name="^aarch64-unknown-linux-gnu$" />
+    </targets>
+    <hosts>
+      <host name="^aarch64-unknown-linux-gnu$" />
+    </hosts>
+    <config>
+   for Object_Lister use ("nm", "-g");
+   for Object_Lister_Matcher use " [TDRBSG] (.*)";
+
+   package Linker is
+      for Export_File_Format use "GNU";
+      for Export_File_Switch use "-Wl,--version-script=";
+   end Linker;
+    </config>
+  </configuration>
 </gprconfig>